CN109235656B

CN109235656B - Installation method of prefabricated staircase in modular building

Info

Publication number: CN109235656B
Application number: CN201811226573.0A
Authority: CN
Inventors: 不公告发明人
Original assignee: Yike Energy Technology (tianjin) Co Ltd
Current assignee: Tianjin Longren Real Estate Development Co ltd
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2019-12-27
Anticipated expiration: 2038-10-19
Also published as: CN109235656A

Abstract

A method of installing a prefabricated staircase in a modular building, the prefabricated staircase comprising a lower staircase section and an upper staircase section, the method of installing comprising: fixing the bottom of the lower stair section on a bottom beam of the lower modular unit, and fixing the top of the lower stair section on a middle stair beam; a temporary fixing beam is arranged below the middle stair beam, the bottom of the upper stair section is temporarily fixed on the temporary fixing beam, and the upper end of the upper stair section is temporarily fixed on the top beam of the lower module unit; after the upper-layer module unit and the lower-layer module unit are assembled, the upper stair section is lifted, the bottom of the upper stair is fixed on the middle stair beam, and the top of the upper stair section is fixed on the bottom beam of the upper-layer module unit. The invention can realize that all the stairwell module units are constructed in a factory, and avoids the defects of insufficient operation space and incapability of construction when the stairwell is installed in the later period.

Description

Installation method of prefabricated staircase in modular building

Technical Field

The invention belongs to the technical field of buildings, and particularly relates to a method for installing a prefabricated staircase in a modular building.

Background

The modular steel structure system is a building produced by manufacturing house units or components according to the standard and uniform building part specification and then transporting the house units or components to a construction site for assembly in place. The building construction method has the characteristics of light building weight, energy conservation, environmental protection, high construction speed, high industrialization degree and the like, can solve the problems of low building industrialization level, low building construction labor productivity, low quality of traditional house products and the like in China, and is suitable for the development of the building industry in China.

In the existing modular building, the stairway is generally assembled on site, there is a problem of inconvenience in construction due to limited space in the module unit, and the stairway assembly is greatly restricted and the assembly efficiency is also low due to the inability to use large equipment in the module unit.

Disclosure of Invention

Technical problem to be solved

In order to solve the problems in the prior art, the invention provides an installation method of a prefabricated staircase in a modular building, which can solve the problems of inconvenient operation and the like during field assembly.

(II) technical scheme

In order to achieve the purpose, the invention adopts the following technical scheme:

a method of installing a prefabricated staircase in a modular building, said prefabricated staircase comprising a lower staircase section and an upper staircase section, said method of installation comprising:

fixing the bottom of the lower stair section on a bottom beam of the lower modular unit, and fixing the top of the lower stair section on a middle stair beam;

a temporary fixing beam is arranged below the middle stair beam, the bottom of the upper stair section is temporarily fixed on the temporary fixing beam, and the upper end of the upper stair section is temporarily fixed on the top beam of the lower module unit;

after the upper-layer module unit and the lower-layer module unit are assembled, the upper stair section is lifted, the bottom of the upper stair is fixed on the middle stair beam, and the top of the upper stair section is fixed on the bottom beam of the upper-layer module unit.

In some embodiments, a chain block is used to lift the upper stair flight.

In some embodiments, the temporarily fixed upper stair sections are used for transportation and/or passage ways.

In some embodiments, the intermediate stair nosing is secured to a post of the lower modular unit.

In some embodiments, the temporary securing beam is fixed to the upright of the lower modular unit.

In some embodiments, the prefabricated staircase includes a platform secured to the intermediate stair stringer, the top of the lower stair section being fixedly attached to the platform, and the bottom of the upper stair section being fixedly attached to the platform when the upper stair section is installed.

In some embodiments, the top of the lower stair section includes a first platform secured to the intermediate stair stringer and the bottom of the upper stair section includes a second platform temporarily secured to the temporary securing stringer to fixedly connect the second platform of the upper stair section to the intermediate stair stringer when the upper stair section is installed.

In some embodiments, the upper stair section is temporarily secured and finally secured with bolts.

(III) advantageous effects

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

the prefabricated staircase installation method provided by the invention can avoid the problems of inconvenient operation and the like when the upper and lower layer module units of the modular building are assembled on site, and can realize that all the stairwell module units are constructed in a factory. After the upper stair sections are temporarily fixed, the upper stair sections can pass through, so that the upper stair sections and the lower stair sections can be used as up-down transportation and passing channels in the assembly field. In addition, the stair are installed in the stairwell module unit in advance, and the defects that the operation space is insufficient and the construction cannot be carried out when the stair are installed in the later period are avoided.

Drawings

FIG. 1 is a component exploded view of a joint structure using welding of inner liners according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a connection structure using welding of inner liner plates according to an embodiment of the present invention;

FIG. 3 is a schematic structural view of a modular building employing an interior lining panel attachment structure according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a column welding mold according to an embodiment of the present invention;

FIG. 5 is a schematic view of a stud welding combination connection structure of the pillar and the top beam according to the embodiment of the invention;

FIG. 6 is a schematic view of a stud-welded assembly connection structure of a stud and a bottom beam according to an embodiment of the present invention;

FIG. 7 is a schematic view of a primary and secondary beam connection structure according to an embodiment of the present invention;

FIG. 8(a) is an overall schematic view of a building module unit assembly mold according to an embodiment of the present invention;

FIG. 8(b) is a side view of FIG. 8 (a);

FIG. 9(a) is a top view of the building module unit assembly mold of FIG. 8(a) without the top positioning frame;

FIG. 9(b) is a bottom view of the top positioning frame of FIG. 8 (a);

FIG. 10 is a schematic structural view of a chute according to an embodiment of the invention;

FIG. 11 is a schematic view of a U-shaped channel steel fixed die floor slab structure according to an embodiment of the invention;

FIG. 12 is a schematic view of a modular building having a U-shaped steel channel fixed die floor structure according to an embodiment of the present invention;

FIG. 13 is a schematic structural view of a foundation anchor bolt coupling device according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a modular building manufactured based on a stud welding mold according to an embodiment of the present invention;

FIG. 15A is a schematic diagram of a connection structure of module units at the same layer according to an embodiment of the present invention;

FIG. 15B is a schematic view of a connection structure of module units at the same layer according to another embodiment of the present invention;

FIG. 16 is a top view of a connection structure for connecting adjacent second beam-column gusset panels according to an embodiment of the present invention;

FIG. 17 is a schematic structural view of a nut holding member according to an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of the connection of the upper and lower module units by the positioning component according to the embodiment of the present invention;

FIG. 19 is a schematic structural diagram of a positioning member according to an embodiment of the present invention;

FIG. 20 is a schematic view of a fire wall apparatus according to an embodiment of the present invention;

fig. 21A is a schematic view of a modular unit base floor splicing structure according to an embodiment of the invention;

FIG. 21B is a schematic view of a V-shaped plate according to an embodiment of the present invention;

fig. 22 is a schematic structural view illustrating temporary installation and fixation of a stair and storey module unit according to an embodiment of the present invention;

fig. 23 is a schematic structural view of the stair-step module unit according to the embodiment of the present invention after installation.

Detailed Description

In order that the objects, technical solutions and advantages of the present invention will become more apparent, the present invention will be further described in detail with reference to the accompanying drawings in conjunction with the following specific embodiments.

The modular building of the present invention may be a one-storey or multi-storey structure building comprising a plurality of modular units. Each modular unit comprises a plurality of upright posts, and each upright post is a hollow rectangular, square or round steel pipe. The bottom of stand is through welded mounting have the bottom connecting plate, and the top of stand is through welded mounting have the top connecting plate. The bottom end connecting plate and the top end connecting plate can be rectangular, square or circular, and the cross sectional area of the bottom end connecting plate and the top end connecting plate is larger than that of the upright post. The upper end and the lower end of the upright post are respectively connected with the top beam and the bottom beam.

In the module unit, the upper end and the lower end of each upright post are welded with connecting plates. Because the size and the straightness that hangs down of steel structural component such as stand all have higher requirements among the modularization building, current welding technique, two component beadings that are connected are together usually, this way shortcoming is when connecting the component beading, and electric welding machine welder directly carries out the hot melt to the welded connection position of steel member, and the size deformation of component is great, and size precision is difficult to control. Accordingly, in one exemplary embodiment of the present invention, a connection structure using welding of an inner liner plate is provided. Through the assistance of the inner lining plate, the welding gun of the electric welding machine does not need to directly carry out hot melting on the welding connection part of the steel member, the deformation of the welding part generated by the hot melting is effectively controlled, and the size precision of the stand column can be accurately controlled.

Fig. 1 and 2 are a disassembled view and a sectional view of a connecting structure welded by using an inner lining plate 102 according to an embodiment of the present invention. As shown in the drawings, the connection structure welded by the lining plate 102 according to the present invention includes: a column 101, a connecting plate 103, and an inner lining plate 102.

The following describes each part of the connection structure of the present embodiment by welding the inner liner plate 102 in detail.

The vertical column 101 is a hollow square or round steel pipe and is used as a bearing structure of a building module unit. The building module unit is formed by combining at least four upright posts 101, and the lower parts of the upright posts 101 of the upper-layer module unit and the upper parts of the upright posts 101 of the lower-layer module unit are connected with each other through connecting plates 103. The at least four uprights 101 are of identical construction. In other embodiments, the number of the columns 101 may be 4, or may be 6 or more.

The lower end of the upright column 101 of the upper layer module unit and the upper end of the upright column 101 of the lower layer module unit are provided with connecting plates 103 through welding, and two beam-column connecting node plates which are spaced are respectively arranged above the connecting plates 103 at the lower end of the upright column 101. An H-shaped bottom beam is fixed between the two beam-column connecting node plates through welding. And an ALC floor is laid on the bottom beam. Since the modular building is formed by assembling a plurality of building units, the requirement on the dimensional accuracy of the connection between the upright post 101 and the connecting plate 103 is very high, otherwise, the installation cannot be performed.

In this embodiment, the column 101 is a hollow square steel column. The dimension of the hollow inner diameter of the square steel column is substantially equal to the outer dimension of the inner lining plate 102, so that the inner lining plate 102 can be placed on the hollow inner diameter of the steel pipe column. The four side surfaces of the surface of the inner lining plate 102 are provided with clamping parts 105, and the clamping parts 105 are at the same distance from the outer side of the inner lining plate 102. The square steel column is engaged with the lining plate 102, so that the relative positions of the lining plate 102 and the column 101 are fixed. Preferably, the convex clamping portion 105 on each inner side surface is two convex clamping points.

Preferably, the outer side of the fracture of the end part of the square pipe raw material of the upright column 101 is provided with a groove 104 for increasing the welding area, so that the square circular pipe of the upright column 101 is more fully welded with the connecting plate 103, and the connection is firmer.

The outer diameter of the lining plate 102 is the same as the inner diameter of the column 101, so that the outer side surface of the lining plate 102 is attached to the inner side surface of the column 101. In this embodiment, the inner lining plate 102 is a section of square column 101 corresponding to the hollow square steel column, and the outer diameter thereof is the same as the inner diameter of the direction steel column. The first end of the lining plate 102 is placed in the hollow part of the upright post 101, the second end of the lining plate is reserved outside the upright post 101, and the edge of the second end of the lining plate is parallel to the fracture outside edge of the upright post 101.

Since the length of each upright 101 of the modular building is required to meet the standardized production, the precision of the dimensions of each part needs to be strictly controlled. The position of the clamping portion 105 on the inner liner 102 can be set according to the length of the upright 101. Meanwhile, in the welding method, the inner lining plate 102 is used as a welding transition piece, the inner lining plate 102 can be used as a part for bearing a welding seam, and the welding gun does not directly melt the welding part, so that deformation after the welding seam is finished can be reduced, and the welding precision of the upright column 101 can be effectively controlled.

In the welding process, the groove 104 and the lining plate 102 are arranged so that the section of the welding position forms a trapezoid, and thus the welding liquid 106 can be fully contacted with the groove 104, the lining plate 102 and the connecting plate 103.

A clamping groove is arranged at the first end of the lining plate 102, which is arranged in the hollow part of the upright column 101, and is used as a clamping part 105, and a convex clamping point is formed at one side of the clamping groove and correspondingly clamped with the outer edge of the fracture of the square upright column, so that the lining plate 102 and the upright column 101 are fixed in relative positions. Preferably, the clamping groove is a wedge-shaped groove.

The connecting plate 103 is a rectangular or circular plate having a cross-sectional area larger than that of the column 101, and has 4 bolt holes formed around it. When steel structural members are welded in the prior art, two connected members are usually welded together directly, and the method has the defects that the connected members are welded directly, an electric welding machine directly carries out hot melting on the welding connection parts of the steel structural members, the size deformation of the members is large, and the size precision of the members is difficult to control. Therefore, if the upright posts are directly welded with the connecting plates, the welding positions of the upright posts are deformed, the dimensional accuracy standard of the building module unit is difficult to achieve, and the module unit cannot be installed on site.

Therefore, in the embodiment, the connecting plate is abutted to the inner lining plate and then welded with the column and the inner lining plate, the inner lining plate plays a role in bearing a weld joint in the welding process, the electric welding machine does not directly carry out hot melting on the steel column structure, deformation in the welding process of the column and the connecting plate is inhibited to a certain extent, and the inner lining plate is utilized to weld the column and the connecting plate, so that the verticality after the column is welded is effectively controlled.

In one exemplary embodiment of the present invention, a stud welding method based on an inner liner is provided. Through the assistance of the inner lining plate, the electric welding machine does not need to directly carry out hot melting on the welding connection part of the steel member, the deformation of the welding part is effectively controlled, and the size precision of the stand column can be accurately controlled.

The method for welding the upright post and the connecting plate by adopting the lining plate comprises the following steps:

performing beveling treatment on the fracture edge of the upright post;

sleeving a first end of the lining plate on the hollow part of the upright post, reserving a second end of the lining plate outside the fracture of the upright post, and keeping the second end parallel to the outer edge of the fracture of the upright post;

and abutting the second end of the lining plate against the connecting plate, and welding the connecting plate and the upright column so that the welding liquid is in full contact with the groove and the lining plate and the connecting plate.

The respective steps of the welding method of the inner liner plate according to the present embodiment will be described in detail below.

The upright posts are hollow square or round steel pipes and are used as bearing structures of building module units. The outer side edge of the fracture of the upright post is provided with a groove for increasing the welding area. In the welding process, the groove and the lining plate are arranged to enable the section of the welding position to form a trapezoid, so that the welding liquid can be fully contacted with the groove, the lining plate and the connecting plate, and the welding is firmer.

After the stand column is subjected to beveling treatment before welding, the inner lining plate is sleeved in the hollow part of the stand column, and the outer diameter of the inner lining plate is the same as the inner diameter of the stand column in size and shape, so that the outer side face of the inner lining plate is attached to the inner side face of the stand column. In this embodiment, the column is a hollow square steel column, and the inner lining plate is a section of square column structure, and the outer diameter of the section of square column structure is the same as the inner diameter of the direction steel column. When the inner lining plate is sleeved, the first end of the inner lining plate is arranged in the hollow part of the upright post, the second end of the inner lining plate is reserved outside the upright post, and the edge of the second end of the inner lining plate is parallel to the outer edge of the fracture of the upright post.

Specifically, when the first end of the lining plate is sleeved in the hollow portion of the pillar, the position of the lining plate and the position of the pillar need to be relatively fixed. The first end of the lining plate, which is arranged in the hollow part of the upright post, is provided with a clamping part, and the clamping part forms a raised clamping point. In an embodiment, the clamping portion is a clamping groove, and one side of the clamping groove forms a protruding clamping point which is correspondingly clamped with the outer edge of the fracture of the square steel column, so as to fix the relative position of the lining plate and the column. Preferably, the clamping groove is two wedge-shaped grooves.

Since the length of each upright of the modular unit of the modular building is required to meet the standardized production, the precision of the dimensions of the various parts needs to be strictly controlled. The adopted position of the clamping groove of the inner lining plate is set according to the standardized length of the upright column, so that the accuracy of the welding length of the upright column can be effectively controlled. Since the length of each upright of the modular unit of the modular building is required to meet the standardized production, the precision of the dimensions of the various parts needs to be strictly controlled.

After the inner lining plate is fixed, the second end of the inner lining plate is abutted against the connecting plate, and the connecting plate and the upright post are welded. The connecting plate is a rectangular or circular plate with a cross-sectional area larger than that of the stand column, and 4 bolt holes are formed in the periphery of the connecting plate. When steel structural members are welded in the prior art, two connected members are usually welded together directly, and the method has the defects that the connected members are welded directly, a welding gun of an electric welding machine directly carries out hot melting on the welding connection parts of the steel structural members, the size deformation of the members is large, and the size precision of the members is difficult to control. Therefore, if the upright posts are directly welded with the connecting plates, the welded parts of the upright posts can be deformed, the dimensional accuracy standard of the building module unit is difficult to achieve, and the module unit cannot be installed on site.

In the embodiment, the connecting plate is abutted to the inner lining plate and then welded with the stand column, and the transition piece is welded by using the inner lining plate in the welding method, so that the inner lining plate can be used as a part for bearing a welding seam, and the welding gun does not directly perform hot melting on the welded part, thereby reducing the deformation after the welding seam is finished, and effectively controlling the verticality after the stand column is welded.

In one exemplary embodiment of the present invention, a modular building employing an interior lining attachment structure is provided. The modular building is a modular unit building spliced by a plurality of building modular unit modules with columns, top beams and bottom beams, wherein the upper ends of the columns of the lower modular units are welded with connecting plates, the lower ends of the columns of the upper modular units are also welded with connecting plates, and the upper connecting plates and the lower connecting plates are fixed through bolts and nuts.

In this embodiment, the building module unit is formed by combining at least four upright posts, and the lower portion of the upright post of the upper layer module unit and the upper portion of the upright post of the lower layer module unit are connected with each other. The four upright posts have the same structure. In other embodiments, the number of the pillars may be 4, or may be 6 or more.

The lower end of the upright post of the upper layer module unit and the upper end of the upright post of the lower layer module unit are provided with connecting plates by welding, and two beam-column connecting node plates which are spaced are respectively arranged above the connecting plates at the lower ends of the upright posts. And an H-shaped bottom beam is fixed between the two beam-column connecting node plates through bolt welding combination. And an ALC floor is laid on the bottom beam. Because the modularization building is assembled by a plurality of building module units and is formed, the requirement on the size precision of the connection between the upright post and the connecting plate is very high, otherwise, the condition that the installation cannot be carried out can occur.

When stand and connecting plate welding, supplementary through the inside lining board for electric welding welder need not directly carry out the hot melt to the welded connection position of steel member, has effectively controlled the welding position and has warp, and can the size precision of accurate control stand.

Fig. 3 is a schematic structural view of a modular building adopting an interior lining connection structure according to an embodiment of the present invention. As shown in fig. 3, the modular building using the interior lining connection structure according to the present invention includes a plurality of module units, and the module units are connected to each other. The module unit comprises an upright column 301, a top beam 302 and a bottom beam 303, a connecting plate 304 is welded at the tail end of the upright column, and the upper module unit 305 is connected with the upright column of the lower module unit 306 through the connecting plate.

The connection structure of the tail end of the upright column 301 and the connection plate 304 adopts inner lining plate welding, and comprises: stand, connecting plate and interior welt. For the purpose of brevity, any technical features that can be applied to the same embodiment are described herein, and the same description need not be repeated.

The welding of the upright post and the connecting plate needs to be standardized by adopting a die in a factory, and in order to achieve the dimensional accuracy and the verticality of the welding of the standard upright post, the invention provides an upright post welding die and a welding structure thereof.

The invention provides a stand column welding die. Fig. 4 is a schematic structural diagram of a column welding mold according to an embodiment of the present invention. As shown in fig. 4, the pillar welding mold of the present invention includes: a base, two U-shaped channel steels 404, two vertical angle steels 405, a sliding device 406 and an end plate.

The lower base of the welding die is composed of an H-shaped steel 403, sliding devices are respectively arranged at two ends of the H-shaped steel 403, the end plates comprise a first end plate 401 and a second end plate 402 which are vertical, the first end plate 401 and the second end plate 402 are respectively arranged on the sliding devices at two ends of the base and are vertical to the upper surface of the base, and the first end plate 401 and the second end plate 402 are vertical to flange plates on the H-shaped steel 403 to limit the positions of the two end plates. Two standard position marks 410 are arranged on the welding mould and used for determining the standard length of the upright post connected with the connecting plate component, and the distance between the two end plates during welding needs to meet the standard length. Specifically, the positions of the first end plate and the second end plate are changed by adjusting the sliding device, the first end plate and the second end plate abut against a component welded with the upright column, and the two end plates respectively reach corresponding standard position marks, so that the length of the welded upright column is controlled, the length of a finished product processed by the upright column is consistent, and standardized production is realized. Specifically, the sliding device comprises a sliding chute, and a transmission screw is arranged on the sliding chute; a sliding block is erected on the sliding groove and is in threaded connection with the transmission screw rod, and an end plate is fixed on the sliding block; and the adjusting roller is arranged at the end part of the transmission screw rod and is used for adjusting the rotation of the transmission screw rod, so that the sliding block drives the end plate to move relative to the base, and the distance between the first end plate and the second end plate is changed.

Preferably, the slideway further comprises a lock catch for locking the transmission screw. The hasp is the rotatory handle that is fixed in on the drive screw, when this rotatory handle rotatory to the joint in when the spout, to drive screw deadlocks.

Two U-shaped channel steels 404 are further fixed on the sliding block of the sliding device, and the U-shaped channel steels 404 are arranged on the upper surface of the sliding block in an inverted mode and used as supports when the upright columns 408 are machined.

Two vertical angle steels 405 are welded on the flange plate surface of the H-shaped steel 403 and used for limiting the radial position of the upright column 408 on the mold. The clamp 409 is disposed on two vertical angles 405 and two end plates. Wherein, set up in the radial direction that two vertical angle steel 405 are used for fixed stand, set up anchor clamps on two end plates and be used for fixing the connecting plate.

The upright column 408 to be processed is horizontally placed between a first end plate 401 and a second end plate 402 at two ends of a welding mould, the second end of the lining plate is abutted against a connecting plate to be welded with the upright column at two ends of the upright column, the positions of the first end plate 401 and the second end plate 402 on the upright column are adjusted through sliding devices 406 at two ends of the welding mould, the two end plates respectively reach standard position marks corresponding to bottoms, and the length directions of the upright column 408 and the connecting plate are limited through the first end plate 401 and the second end plate 402 of the welding mould; after the radial direction of the upright column 408 is limited and fixed and the length and the radial position of the upright column 408 are both arranged, the position of the upright column is fixed by a clamp 409, and the column body and the connecting plate 407 are fixed by spot welding. After the column 408 and the connecting plate are fixed in a spot welding mode, the clamp 409 is loosened, the processed column is lifted away, and the spot welding processing of the column is completed.

In the embodiment, the stand welding mold is combined with the welding of the lining plate, so that the stand shaping and the fixed mold processing production are realized, and the size and the modulus of the processed stand are consistent. The length size precision after the stand processing has effectively been guaranteed in the standardized production of stand, has solved the problem that the stand length differs when the modular unit assembles and influences the equipment precision. The stand column is processed through the welding mould, so that the verticality of the stand column gusset plate and the column body is guaranteed, and the processing verticality of the stand column is guaranteed.

Further, the structure for welding the stand column by using the welding mold according to the embodiment of the present invention includes: stand, connecting plate and interior welt. Any technical features that can be applied to the same embodiment are described herein, and the same description need not be repeated.

In one exemplary embodiment of the present invention, a modular building manufactured based on a stud welding die is provided. The modular building is a modular unit building spliced by a plurality of building modular units with columns, top beams and bottom beams, wherein the upper ends of the columns of the lower modular units are welded with connecting plates, the lower ends of the columns of the upper modular units are also welded with connecting plates, and the upper connecting plates and the lower connecting plates are fixed through bolts and nuts. When stand and connecting plate welding, supplementary through the inside backing plate for the electric welding need not directly carry out the hot melt to the welded connection position of steel member, has effectively controlled the welding position and has warp, and can the accurate control stand size, every modular unit the stand is a standardized length with the overall length of connecting plate.

The standardized production of connecting plate and stand realizes through stand welding mould. Adopt standardized stand welded structure that welding die made includes: stand, connecting plate and interior welt. Any technical features that can be applied to the same embodiment are described herein, and the same description need not be repeated.

In the process of installing the module unit, after the post and the connecting plate are welded, the beam and the post need to be connected.

The invention provides a beam-column stud welding combined connection structure, which replaces a common pure welding structure for connecting a traditional beam and a traditional column, has great stress potential at a connecting node of the beam and the column compared with the traditional pure welding structure, and can be suitable for a steel structure building system. In the stud welding combined connection structure of the present invention, the upper end and the lower end of the upright post are respectively connected to the two cross beams by stud welding, and a specific embodiment of the stud welding combined connection structure will be specifically described below.

In one embodiment of the present invention, a modular building is provided having a bolted composite joint comprising a column 510 and a beam, which in this embodiment is illustrated by a top beam 520. As shown in fig. 5, a top connecting plate 512 perpendicular to the column is fixed to the top end of the column 510, a first beam-column connecting node plate 511 perpendicular to the column is fixed to the top end, and a first beam-column connecting web 513 is fixed to the side wall of the column 510 between the top connecting plate 512 and the first beam-column connecting node plate 511. The top beam 520 is an H-shaped steel beam and is integrally formed by an upper flange plate 522, a lower flange plate 521 and a top beam web 523.

The top end connecting plate 512 and the first beam-column connecting node plate 511 are respectively welded and connected corresponding to the upper flange plate 522 and the lower flange plate 521, and the first beam-column connecting web 513 and the top beam web 523 are attached and connected through bolts, so that the stud welding combination connection of the upright column 510 and the top beam 520 is completed.

In this embodiment, the first beam-column connecting web 513 and the top beam web 523 are provided with 3 pairs of mounting holes 514 corresponding in position, through which bolts can respectively pass for bolt connection. Preferably, the bolt is a friction type high strength bolt.

Preferably, the first beam web 513 is welded to the top beam web 523 at the peripheral edge position of the joint surface between the first beam web 513 and the top beam web 523, so as to improve the joint strength.

In this embodiment, the upright 510 may be a hollow circular steel tube, a square or a rectangular steel tube, and is not particularly limited, and may be selected according to actual requirements. The top end connecting plate 512 is a circular plate, a square plate, a rectangular plate, or the like having a larger cross-sectional area than the pillar, and the outer edge of the first beam-column connecting gusset plate 511 may have a circular, square, or rectangular shape, and the shape is not particularly limited as long as the top end connecting plate can be welded to the upper flange plate 522 and the lower flange plate 521, respectively.

Top end connecting plate 512, first beam-column connecting gusset plate 511 and first beam-column connecting web 513 may be welded to columns 510, respectively.

In this embodiment, the top connection plate has bolt holes 515 for bolts to pass through for bolting when connecting to adjacent columns.

After the beam-column bolt-welding combined connection mode is applied to a frame type building structure, if an earthquake or accidental huge load occurs, a welding seam between a top end connecting plate of an upright column and upper and lower flange plates of a top beam is firstly broken and cracked, first-stage stress is borne, and a friction surface between a first beam-column connecting web plate and a top beam web plate bears second-stage stress; if the friction surfaces between the first beam-column connecting web plate and the top beam web plate are relatively dislocated, the screw shearing force of the bolt bears the third stage, and the stress potential of the connecting joint between the beam and the column is improved.

As shown in fig. 6, the cross beam in this embodiment is illustrated by a bottom beam 620. The bottom beam 620 has the same structure as the top beam 610 of the first embodiment, and includes an upper flange plate 622, a lower flange plate 621, and a bottom beam web 623, which are integrally formed. A second beam-column connecting node plate 611 and a third beam-column connecting node plate 611 'which are perpendicular to the vertical column are fixed at the position, close to the bottom end, of the vertical column 610, and a second beam-column connecting web 613 is fixed between the second beam-column connecting node plate 611 and the third beam-column connecting node plate 611' on the side wall of the vertical column.

The second beam-column connecting node plate 611 and the third beam-column connecting node plate 611' are welded to the upper flange plate 622 and the lower flange plate 621, respectively, and the second beam-column connecting web 613 and the bottom beam web 623 are attached to each other and connected by bolts, so as to complete the bolt-weld combination connection of the upright column 610 and the bottom beam 620.

In this embodiment, the second beam-column connecting web 613 and the bottom beam web 623 are provided with 2 pairs of mounting holes 614 at corresponding positions, through which bolts can pass for bolt connection respectively. Also, the bolt is preferably a friction type high strength bolt.

In this embodiment, a bottom end connecting plate 612 is fixed to the bottom end of the upright 610, and is perpendicular to the upright 610, and the bottom end connecting plate 612 has a mounting hole 615 for a bolt to pass through for bolting when connecting with an adjacent upright.

The invention changes the traditional method of pure welding of the beam column, and replaces pure welding technology with bolt welding combination connection, thereby improving the stress characteristic of the node. Brittle failure is likely to occur due to tensile failure of the pure weld joint. The bolt welding combination connection of the invention is approximate to three-stage fortification stress. If earthquake or accidental huge load occurs, the welding seams of the column gusset plate and the upper and lower flange plates of the beam are firstly damaged and pulled apart to bear the stress of the first stage; the friction surface between the webs bears the stress of the second stage; if the friction surfaces of the webs are relatively dislocated, the screw shearing force of the high-strength bolt is subjected to a third stage. Compared with pure welding rigid connection, beam-column connection uses stud welding combination rigid connection, and has great stress reserve potential on the stress characteristic of the node. The anti-seismic performance of the structural system is greatly improved, and the anti-seismic design concept of 'strong nodes and weak members' is also met.

In the installation process of the modular unit, the bottom beam and the top beam which are directly and fixedly connected with the upright posts are main beams of the modular unit, and the main beams can be connected through secondary beams. The secondary beam can also be H-shaped steel.

In one embodiment, as shown in fig. 7, the invention provides a modular building with primary and secondary beam bolted joints, comprising at least one modular unit comprising uprights, primary beams and secondary beams, wherein the primary beams are fixedly connected to the uprights, and the secondary beams are connected between the primary beams. The main beams 701 are fixedly connected with a vertical column (not shown in the figure), the secondary beam 702 is connected between the two main beams 701, and both the main beams 701 and the secondary beam 702 are H-shaped steel. At the connecting position of the girder 701, a connecting web 706 is welded on a girder web 705 between the upper flange plate 703 and the lower flange plate 704, the connecting web 706 is perpendicular to the girder web 705, and the connecting web 706 is welded with the upper flange plate 703 and the lower flange plate 704 respectively. The width of the welding end of the connecting web 706 is equal to the net distance between the upper flange plate 703 and the lower flange plate 704 of the main beam, and the other end of the connecting web 706 protrudes out of the upper flange plate 703 and the lower flange plate 704 of the main beam, and is provided with two or more bolt holes, and the width of the bolt holes can be smaller than the width of the welding end. At the connecting part of the secondary beam 702, bolt holes corresponding to the bolt holes on the connecting web 706 are formed at the end part of the secondary beam web 707, and the connecting web 706 and the secondary beam web 707 of the secondary beam are fixed through bolts and nuts, wherein the bolts are preferably friction type high-strength bolts.

In one embodiment, the connecting web 706 is rounded at the intersection of the spar web 705 and the upper and lower flange plates 703, 704 in order to ensure that the weld between the connecting web and spar is continuous and complete. Certain gaps can be reserved between the upper flange plates 708 and 709 of the secondary beams and the upper flange plates 703 and 704 of the main beams, so that when an earthquake or accidental huge load occurs, the flexible connection of the primary beams and the secondary beams generates relative movement to absorb partial energy, and in addition, the damage to beam members caused by contact collision between the flange plates of the main beams and the flange plates of the secondary beams can be avoided when the primary beams and the secondary beams move relatively.

In one embodiment, a rectangular stiffening plate 710 is arranged on the back side of the connection part of the primary and secondary beams, is perpendicular to the upper flange plate 703 and the lower flange plate 704 of the primary beam, and is welded with the upper flange plate 703, the lower flange plate 704 and the web 705 of the primary beam. The stiffening plate 710 can prevent the main beam from being damaged due to local instability when the main beam is twisted and bending moment is generated due to the single-side stress of the connection part of the main beam and the secondary beam.

The pure bolt connection of the connection structure of the main beam and the secondary beam can realize the hinge pure flexible connection between the main beam and the secondary beam, and the main beam and the secondary beam can move relatively to absorb partial energy when encountering accidental huge load, thereby meeting the design principle of standard requirements and having the stress characteristic of a structural system. And when the structure is adopted, the construction is simple and convenient, the disassembly and the assembly are easy, the components are easy to replace, and the repeated utilization rate of the steel components is high.

In order to ensure the dimensional accuracy of the processing of the module units, the module units are assembled in a positioning die.

The invention provides an assembly mold for building module units, which is used for assembling the building module units on the mold, accurately positioning an upright post, ensuring the verticality of the upright post and realizing standardized assembly.

In an embodiment of the present invention, a building module unit assembling mold is provided, and fig. 8(a) is an overall schematic view of the building module unit assembling mold according to the embodiment of the present invention; FIG. 8(b) is a side view of FIG. 8 (a); FIG. 9(a) is a top view of the building module unit assembly mold of FIG. 8(a) without the top positioning frame; fig. 9(b) is a bottom view of the top positioning frame shown in fig. 8 (a).

As shown in fig. 8(a), 8(b), 9(a), and 9(b), the building module unit of this embodiment includes a column 810, a bottom beam 820, and a top beam 830, and the building module unit assembling mold of this embodiment includes a bottom positioning mold 840 and a top positioning mold 850, where:

the bottom positioning mold 840 includes a plurality of mounting bases 841 and a first horizontal adjusting device, wherein the mounting bases 841 temporarily fix the bottom ends of the columns 810, the mounting bases 841 are connected to the first horizontal adjusting device, and the positions and the intervals of the mounting bases 841 in the horizontal direction are adjusted by the first horizontal adjusting device;

the top positioning mold 850 includes a plurality of fixing caps 851, a top positioning frame 852, a second horizontal adjustment device and a height adjustment device 855, wherein the plurality of fixing caps 851 temporarily fix the top ends of the plurality of pillars 810, the fixing caps 851 are fixed to the second horizontal adjustment device, the position and the distance of each fixing cap 851 in the horizontal direction are adjusted by the second horizontal adjustment device, the second horizontal adjustment device is connected below the top positioning frame 852, the top positioning frame 852 is connected to the height adjustment device 855, and the position of the top positioning frame 852 in the height direction is adjusted by the height adjustment device 855.

The components of the building module unit assembly mold will be described in detail below.

A bottom end connecting plate 811 is generally provided at the bottom end of the column 810, and a plurality of mounting holes (not shown) are provided in the bottom end connecting plate 811 for upper and lower connection with the column of the module unit adjacent below, and in the bottom positioning mold of the present embodiment, mounting holes corresponding to the number and positions of the mounting holes in the bottom end connecting plate are provided in the mounting base 841 for the bolt bars to pass through to temporarily bolt the mounting base 841 and the bottom end connecting plate 811 together.

As shown in fig. 9(a), the mounting holes on the mounting base 841 are arranged in groups of four, and preferably, the mounting holes on the mounting base 841 are arranged in at least two groups, respectively for mounting bottom end connection plates of different sizes; the number of the mounting holes in each group is consistent with that of the mounting holes in the bottom end connecting plate.

As shown in fig. 8(a) - (b) and 9(a), the first horizontal adjustment device includes a first length adjustment mechanism 843 and a first width adjustment mechanism 842, the first length adjustment mechanism 843 includes 2 first slide ways 843a, 843b arranged horizontally in parallel, the first width adjustment mechanism 842 is provided with at least two second slide ways (3 second slide ways 842a, 842b, 842c shown in the figure) arranged horizontally in parallel, the second slide ways 842a, 842b, 842c are vertically arranged on the first slide ways 843a, 843b and can move along the first slide ways 843a, 843b to change the distance between the adjacent second slide ways, and each second slide way is provided with at least two mounting bases 841 (2 shown in the figure) which can move along the second slide ways 842a, 842b, 842 c. For the convenience of understanding, the first slide way and the second slide way are simply drawn by using a block as a schematic diagram in the foregoing drawings, and a specific schematic structure diagram is shown in fig. 10.

As shown in fig. 10, the first sliding track 843a includes a first sliding slot 1010a, on which a first transmission screw 1020a is disposed; a first sliding block 1030a is erected on the first sliding groove 1010a and is in threaded connection with the first transmission screw 1020a, and a second sliding way is fixed on the first sliding block 1030 a; a first adjusting roller 1040a is disposed at an end of the first transmission screw 1020a for adjusting the rotation of the first transmission screw 1020 a. At this time, the first adjusting roller 1040a is rotated to enable the first slider 1030a to drive the second sliding track to move relative to the first sliding slot 1010a, so as to change the distance between the adjacent second sliding tracks. It is easy to understand that in order to enable each second slideway to move independently, at least two first transmission screws can be arranged on the first chute to respectively transmit the second slideways.

Further, the first sliding way 843a further includes a first locking device, which can lock the first transmission screw 1020a, for example, the first locking device is a first rotating handle 1050a fixed on the first transmission screw, and when the first rotating handle 1050a rotates to be clamped in the first sliding groove 1010a, the first transmission screw 1020a is locked.

Similarly, taking the second slide way 842a as an example, it has the same structure as the first slide way 843a, and includes a second slide way 1010b on which the second transmission screw 1020b is disposed; a second sliding block 1030b is erected on the second sliding groove 1010b and is in threaded connection with the second transmission screw 1020b, and a mounting base 841 is fixed on the second sliding block 1030 b; a second adjustment roller 1040b is disposed at an end of the second driving screw 1020b to adjust the rotation of the second driving screw 1020 b. At this time, the second adjusting roller 1040b is rotated to make the second sliding block 1030b drive the mounting base 841 to move relative to the second sliding slot 1010b, so as to change the distance between adjacent mounting bases. It is easy to understand that in order to enable each mounting base to move independently, at least two second transmission screws may be disposed on the second chutes to transmit the mounting bases, respectively.

Further, the second slide 842a further includes a second lock catch, which can lock the second transmission screw 1020b, for example, the second lock catch is a second rotation handle 1050b fixed on the second transmission screw 1020b, and when the second rotation handle 1050b rotates to be clamped in the second slide groove 1010b, the second transmission screw 1020b is locked.

In this embodiment, the first leveling device is fixed to the bottom positioning frame 844 welded by a plurality of cross members by welding or the like, thereby forming a firm integral structure and ensuring accurate positioning of the mold.

A top connecting plate 812 is generally provided at the top end of the column 810, and a plurality of mounting holes are provided in the top connecting plate 812 for upper and lower connection with the column of the adjacent module unit above, and in the top positioning mold of the present embodiment, mounting holes corresponding to the number and positions of the mounting holes in the top connecting plate 812 are provided in the mounting nut 851, through which a bolt rod passes to temporarily bolt the mounting nut 851 and the top connecting plate 812 together.

Similar to the design of the mounting holes in the mounting base 841, the mounting holes in the mounting cap 851 are arranged in at least two sets for mounting different sized top end attachment plates 812; the number of the mounting holes in each group is consistent with that of the mounting holes in the top end connecting plate.

Cooperating locating features 813 and locating holes may also be provided between the mounting cap 851 and the stud's top end attachment plate 812 to facilitate mating of the mounting cap 851 and the top end attachment plate 812.

As shown in fig. 8(a) - (b) and 9(a), the second horizontal adjusting device has the same structure as the first horizontal adjusting device, and includes a second length adjusting mechanism 853 and a second width adjusting mechanism 854, the second length adjusting mechanism includes two third slide ways 853a, 853b arranged horizontally in parallel, the second width adjusting mechanism 854 includes at least two fourth slide ways (shown as 3 fourth slide ways 854a, 854b and 854c in the figure) arranged horizontally in parallel, the fourth slide ways 854a, 854b and 854c are vertically arranged on the third slide way 855a, and can move along the third slide way to change the distance between the adjacent fourth slide ways, and each fourth slide way is provided with at least two mounting caps 851; height adjustment assembly 855 includes at least two fifth slides (shown as 3 fifth slides 855a, 855b, and 855c) to which a top positioning frame is attached that is movable along the fifth slides.

It is easy to understand that the principle of the structure of the third slide ways 853a, 853b and the fourth slide ways 854a, 854b and 854c is shown in fig. 10, which is the same as the first slide ways 843a, 843b and the second slide ways 842a, 842b and 842c, specifically, the third slide ways 853a, 853b respectively include a third slide slot 1010c, a third driving screw 1020c, a third slider 1030c, a third adjusting roller 1040c and a third rotating handle 1050c, wherein the fourth slide way is fixed on the third slider 1030 c; and the fourth slide ways 854a, 854b and 854c respectively comprise a fourth slide slot 1010d, a fourth transmission screw 1020d, a fourth slide block 1030d, a fourth adjusting roller 1040d and a fourth rotating handle 1050d, wherein the fourth slide block 1030d is fixedly provided with a mounting buckle cap 851.

The fifth slide rails 855a, 855b, and 855c of the height adjusting device 855 are similar to the first to fourth slide rails and respectively include a fifth slide groove 1010e, a fifth transmission screw 1020e, a fifth slider 1030e, a fifth adjusting roller 1040e, and a fifth rotating handle 1050e, and are different in that the fifth slide rail is vertically disposed so that the fifth slider 1030e thereon moves in the height direction, a support plate 858 is horizontally fixed to the fifth slider 1030e by welding, etc., and the support plate 858 has a mounting hole 858 fitted with a mounting nut 858 for a bolt to pass through to fix the support plate and the mounting nut 851 together.

As shown in fig. 8(b) and 9(b), the number of the mounting caps 851 on the top positioning mold is 9, 3 of them are respectively fixed on the supporting plate 858 of the height adjusting device 855, and in other embodiments, the number of the mounting caps can be adjusted according to the actual requirement of the module unit, as long as the top positioning mold can be stably connected to the height adjusting device.

In this embodiment, the height adjusting device 855 is fixed to the seat frame welded by the supporting posts 857 and the cross beam 856 by welding or the like, thereby forming a firm integral structure and ensuring accurate positioning of the mold.

As shown in fig. 8(b), the building module unit assembling mold further includes two chain blocks 860 crossing between two adjacent columns where the bottom end and the top end are temporarily fixed, and the lengths of the two chain blocks 860 between the two columns are adjustable, a first end 860a of the two chain blocks is fixed to the top end of one of the columns, a second end 860b of the two chain blocks is fixed to the bottom end of the other column, and the verticality of the column fixed to the first end of the two chain blocks is adjusted by adjusting the length.

The building module unit assembling die further comprises line weights 870 which are respectively arranged on the side faces of the stand columns and used for judging the verticality of the stand columns, and preferably, the line weights are respectively arranged on the two non-opposite side faces of the stand columns so as to judge the verticality of the two side faces of the stand columns at the same time.

Based on the building module unit assembling die, the invention further provides a building module unit assembling method, which comprises the following steps:

step 1: and temporarily fixing the bottom ends of the plurality of stand columns in the building module unit by using the bottom positioning die.

In this step, first, the first horizontal adjustment device is needed to adjust the spacing and the position of each mounting base 841 in the bottom positioning mold, and then the first horizontal adjustment device is locked after the adjustment is completed, specifically, the first adjustment roller 1040a and the second adjustment roller 1040b are rotated to adjust the positions of the mounting bases 841 in the length direction and the width direction, and after the adjustment is completed, the first rotation handle 1050a and the second rotation handle 1050b are rotated to lock the first transmission screw 1020a and the second transmission screw 1020b, respectively; next, a plurality of studs 810 are placed on corresponding mounting bases 841, and the mounting bases 841 and bottom end connecting plates 811 are temporarily bolted together with bolts passing through corresponding mounting holes in the mounting bases 841 and the bottom end connecting plates 811 of the studs.

Step 2: and respectively assembling a bottom beam and a top beam on the plurality of upright columns, and temporarily fixing the beam-column connecting nodes and the beam-beam connecting nodes.

In this step, beam-column connected node and beam-beam connected node are fixed temporarily through not hard up bolted connection to influence the follow-up step of perpendicularity adjustment to the stand.

And step 3: and temporarily fixing the top ends of the plurality of stand columns by utilizing a top positioning die.

In this step, the position of the installation buckle cap 851 is adjusted by adjusting the second horizontal adjusting device, then the height adjusting device 855 is adjusted to reduce the height of the top positioning frame 852, and the installation buckle cap 851 is placed on the top end connecting plate 812 corresponding to the upright post, preferably, the installation buckle cap 851 and the top end connecting plate 812 can be butted by matching a positioning part and a positioning hole between the installation buckle cap 851 and the top end connecting plate 812. Next, the mounting cap 851 and the tip attachment plate 812 are temporarily bolted together using bolts through corresponding mounting holes in the mounting cap 851 and the tip attachment plate 812.

And 4, step 4: after the verticality of the multiple upright columns is adjusted, the beam column connecting nodes and the beam connecting nodes are permanently fixed.

As shown in the figure, in this step, the verticality of the vertical column 810 is adjusted by two chain blocks 860 with adjustable length, which are arranged between two adjacent vertical columns in a crossed manner; after the verticality of the upright post is adjusted, the beam-column connecting node and the beam-beam connecting node can be permanently fixed by welding; or may be permanently secured by tightening loose bolts at the beam-column and beam-beam connection nodes.

The building module unit can be assembled through the four steps, and the building module units assembled by using the same top positioning die and the same bottom positioning die have standardized sizes.

Based on the above description of the building module unit assembling mold, in an embodiment of the present invention, there is provided an adjusting system for building module unit assembling, as shown in fig. 8(a), 8(b), 9(a), and 9(b), the building module unit of the present embodiment includes columns 810, bottom beams 820, and top beams 830, and the adjusting system of the present embodiment includes a first horizontal adjusting device, a second horizontal adjusting device, and a height adjusting device, wherein the first horizontal adjusting device is used for adjusting the position and the distance in the horizontal direction of a plurality of mounting bases 841, which can temporarily fix the bottom ends of a plurality of columns 810; the second horizontal adjusting device is used for adjusting the position and the distance of the plurality of mounting caps 851 in the horizontal direction, the second horizontal adjusting device is fixed on a top positioning frame 852, and the height adjusting device 855 is used for adjusting the position of the top positioning frame 852 in the height direction. The building module unit assembling die and the adjusting system can accurately position the upright post and ensure the verticality of the upright post, thereby realizing the standardized assembly of the building module unit.

During the installation of the modular units in a factory, the staircase shaft, the elevator shaft, needs to be implemented in a single modular unit. In which the sill structure is used as a support structure for the walls of the floor slab, while the stairwell and elevator shaft are usually smaller than the space of a single unit, and the floor slab in the peripheral part thereof is required to form a regular square space. The squareness of the hoistway must be controlled within a tolerable error range, for example if the hoistway is not square, the elevator will not operate properly after installation. The traditional steel structure floor type has: the method for manufacturing the profiled steel plate concrete floor slab comprises the following steps of forming profiled steel plate concrete floor slabs, cast-in-place integral concrete floor slabs, concrete composite floor slabs, ribbed OSB slabs, light steel floor slabs, self-supporting reinforced truss concrete composite floor slabs, fiber cement pressure slabs and the like, and has certain difficulty in realizing regular and square space and controlling size deviation at the periphery of a hoistway.

In order to solve the above problems, in an exemplary embodiment of the present invention, there is provided a modular building having a U-shaped steel channel fixed mold floor structure. The modular building is a modular unit building spliced by a plurality of building modular units with columns, top beams and bottom beams, wherein the upper ends of the columns of the lower modular units are welded with connecting plates, the lower ends of the columns of the upper modular units are also welded with connecting plates, and the upper connecting plates and the lower connecting plates are fixed through bolts and nuts.

FIG. 12 is a schematic view of a modular building with a U-shaped steel channel fixed die floor structure according to an embodiment of the invention. As shown in fig. 12, wherein the modular unit includes regular hoistway spaces 1201, the U-channel steel floor structure 1202 is used for the wall support structure of the modular unit hoistway. The floor slabs on the periphery of the shaft are made into shaped U-shaped channel steel, the U-shaped channel steel and the module bottom beam 1203 are welded together, and then concrete or ALC (autoclaved lightweight concrete) plate 1204 blocks and cement mortar 1205 are poured into the U-shaped channel steel for fixation. The U-shaped channel steel is used as a bearing structure of the wall body to form a regular square well floor slab, so that the construction size precision is effectively controlled.

Fig. 11 is a schematic view of a fixed die floor structure of U-shaped channel steel according to an embodiment of the invention. As shown in fig. 11, when the U-shaped channel steel structure is used as a floor structure of the module unit hoistway, a regular module building space can be formed. And (3) making the periphery of the well into a shaped U-shaped channel steel, welding the U-shaped channel steel and the bottom beam of the module together, and then pouring concrete or an ALC plate block and cement mortar into the U-shaped channel steel for fixation. The floor filled with the U-shaped channel steel forms a regular and square well floor which is used as a bearing structure of a wall body to form the regular and square well floor, so that the construction size precision is controlled.

Specifically, U type groove steel construction includes:

the supporting substrate 1101 is a supporting structure of a U-shaped channel steel, and in this embodiment, the supporting substrate 1101 is a bottom beam of a module unit upright. Specifically, in the modularization building, every unit module includes four stands at least, and the bottom of every stand is provided with the bottom connecting plate, and the top is provided with the top connecting plate, has set gradually first beam column connecting plate, second beam column connecting plate and third beam column connecting plate from the top down between top connecting plate and the bottom connecting plate, and wherein first beam column connecting plate is close to the top connecting plate, and second beam column connecting plate and third beam column connecting plate are close to the bottom connecting plate to with floorbar fixed connection, the floorbar is as the bearing basement 1101 of the bearing structure of U type channel-section steel.

And the U-shaped groove 1102 is used as a floor base layer after being filled and filled, and is used as a bearing structure of a wall body, and the wall body is fixedly arranged on the floor base layer. The opening of the U-shaped groove 1102 is upward, and the width of the opening can be shaped together according to the width of the wall and the size of the well. In particular, the wall may be a fire wall with a large thickness, and the width of the U-shaped groove 1102 may be widened according to the construction of the fire-proof rating of the fire-proof wall.

In this embodiment, the U-shaped groove 1102 and the bottom beam are fixed by welding. Specifically, the U-shaped groove 1102 is welded to the upper portion of the upper flange plate of the H-shaped bottom beam and extends to the upright column from the upper portion of the upper flange plate, and the U-shaped groove 1102 is welded and fixed to the upper portion of the upper flange plate. Preferably, the size of the hoistway space formed by the U-shaped groove 1102 is set according to the space required by an elevator car and the like; namely, the groove edge of the U-shaped groove 1102 close to the shaft is arranged according to the space required by the shaft, and the groove edge far away from the shaft is flush with the outer sides of other floor base layers.

And the filling material 1110 is arranged in the opening of the U-shaped groove 1102, so that the upper part of the U-shaped steel is flat, and a stable supporting platform of the wall body is formed. The filler material may include concrete or ALC slab blocks 1111 and cement mortar 1112 or other setting building materials.

In one embodiment, the filler material is concrete. By casting concrete inside the opening of the U-shaped channel 1102, a flat support platform is formed at the upper part of the U-shaped channel 1102.

In another embodiment, the filler material is ALC plate blocks and cement mortar. Specifically, the ALC board is made into a plurality of ALC blocks 1111, the thickness of the ALC blocks 1111 is equal to the opening depth of the U-shaped groove, the length and the width of each ALC block 1111 are smaller than the length and the width of the opening of the U-shaped steel groove, so that the ALC blocks 1111 can be placed inside the opening of the U-shaped groove 1102, and pouring materials such as concrete or cement mortar can be poured around the ALC blocks 1111 in the U-shaped groove 1102 to better fix the ALC board; after the U-shaped steel groove is welded to the bearing substrate 1101, a plurality of ALC blocks 1111 are uniformly placed inside the opening of the U-shaped steel groove 1102 side by side and fixed through pouring cement mortar, so that a flat supporting platform is formed at the upper part of the U-shaped steel groove 1102.

In the embodiment, the ALC is an inorganic silicate material, has good fire resistance and heat insulation performance, and is low in manufacturing cost. After a predetermined size of the hoistway space is formed, ALC floors are laid at the rest positions. Meanwhile, as the ALC block 1111 is fixed by pouring cement mortar, the performance of the wall body bearing platform is ensured, the manufacturing method is simplified, and the manufacturing cost is reduced.

The modular building of this embodiment adopts U shaped steel groove cover half floor structure for the modular building floor size is easier to be controlled, and construction convenience need not erect the template. Through the U type channel-section steel of welding design on the floorbar, can regard as the peripheral wall body bearing board of well to realize the well of regular side, make upper and lower module form the well space of a perpendicular side rule.

After the installation of each module unit is completed in a factory, the module units need to be transported to a construction site for installation. The first layer of module units and the module corner fittings, the base or the foundation base are usually welded and fixed and are rigidly connected, and the installation level and elevation of different column bases of the same module unit are difficult to control. Because the corner fittings and the basic embedded plate or the base are directly welded, when the corner fittings and the basic embedded plate or the base are reused, the corner fittings and the basic embedded plate or the base need to be cut and damaged, and the problem of low reuse rate of the module unit is caused. The field welding space is narrow, holes need to be reserved on the basis or on the inner sides of the module units for operation, the structure and the connectivity of decoration are affected, and the workload of subsequent plugging and decoration repair is increased.

In one exemplary embodiment of the present invention, a connection device for a foundation leveling support is provided. Fig. 13 is a schematic structural view of a connecting device of a basic horizontal adjusting support according to an embodiment of the invention. As shown in fig. 13, the connecting device includes:

n anchor bolts 1301 embedded on a foundation base 1302 of the modular building, wherein n is larger than 1;

a horizontal adjusting support 1303, pre-embedded on the foundation base 1302 of the modular building;

bolt holes 1306 are arranged on the periphery of a connecting plate 1305 of the first-layer module unit upright 1304, and the positions of the bolt holes on the connecting plate 1305 of the first-layer module unit upright correspond to the positions of the n anchor bolts 1301.

Further, n anchor bolts 1301 are uniformly distributed on the base connecting plate 1305; the m horizontal adjustment supports 1303 are evenly distributed in the region formed by the n anchor bolts 1301.

Further, the position of the horizontal adjustment support 1303 corresponds to the position of the center of the base connection plate 1305 of the column 1304 of the first-tier modular unit.

Wherein the horizontal adjustment support 1303 includes:

a supporting nut 1307, wherein a first end of the supporting nut 1307 is provided with a grounding positioning disc 1310, and the grounding positioning disc 1310 is fixedly connected with the base substrate 1302;

a bolt bar 1308 which penetrates through the second end of the supporting nut 1307 and can rotate in the supporting nut 1307 to adjust the horizontal height;

a chuck 1309 nested on the bolt bar 1308, the chuck being rotatable on the bolt bar 1308 to adjust the position on the bolt bar 1308 for abutting against the second end of the support nut 1307 after the bolt bar 1308 reaches a predetermined support height, thereby fixing the relative position of the bolt bar 1308 and the support nut 1307.

Above-mentioned basic level (l) ing supports connecting device need not the welding, when modular unit reuse or shift position, need not the cutting and destroys, and reuse rate is high, and is energy-concerving and environment-protective more. The invention also carries out fastening adjustment through the horizontal adjusting support, controls the construction error of the elevation of the foundation and leads the installation of the first-layer module unit to be more convenient.

When the foundation horizontal adjustment support connecting device is used for realizing the connection between the first-layer module unit and the construction foundation base, the connecting method comprises the following steps:

n foundation bolts are pre-buried on a foundation base, wherein n is larger than 1, and the positions of the n foundation bolts correspond to the positions of bolt holes in a connecting plate of a first-layer module unit upright post;

embedding a horizontal adjusting support in the middle of the foundation bolt on a foundation base;

a connecting plate of the first-layer module unit upright column is contacted with a horizontal adjusting support bolt rod, and meanwhile, foundation bolts penetrate through bolt holes of the connecting plate;

adjusting the height of the horizontal adjusting support to enable the module unit to be horizontal, and fastening an anchor bolt nut to enable an anchor bolt and a first-layer module unit foundation connecting plate to be fixed together;

after the first-layer module unit is connected with the foundation base, the gap between the foundation base and the connecting plate is filled and filled with micro-expansion concrete, and the horizontal adjusting support and the exposed part of the foundation bolt between the gaps are completely covered and wrapped.

When the horizontal adjustment support is adjusted, firstly, the bolt rod at the upper part of the support nut is rotated to adjust the support height. And when the bolt rod reaches a preset supporting height, rotating the chuck to enable the chuck to abut against the second end of the supporting nut, limiting the bolt rod and fixing the supporting height.

The first-layer module unit is connected with the foundation base by adopting the connection method, the foundation bolts are embedded in the corresponding positions of the upright column base connecting plates, the horizontal adjusting supports are embedded in the middle parts of the foundation bolts, the horizontal adjusting supports of the foundation base are in contact with the upright column connecting plates of the upper first-layer module unit, and the construction of the connection structure of the first-layer module unit and the foundation base is convenient. The method improves the welding of the prior art, and can control the construction error of the elevation of the foundation by utilizing the horizontal adjusting support in the middle of the foundation bolt, so that the first-layer module unit is more convenient and simpler to install.

Because this embodiment adopts middle level (l) ing to support the first floor stand connecting plate, the rag bolt lower part need not to set up fixed baseplate, only fastens with the nut on rag bolt's upper portion. And the method does not need welding on the construction site, thereby being beneficial to environmental protection. And adopt this connected mode, if modular unit reuse or shift position, need not the cutting and destroy for modular unit reuse rate is high.

In an exemplary embodiment of the present invention, a modular building based on a foundation level adjustment support connection device is provided, and fig. 14 is a schematic structural view of a modular building based on a foundation level adjustment support according to an exemplary embodiment of the present invention. As shown in fig. 14, the first layer module unit and the base substrate are connected to each other. The first-layer module unit comprises a vertical column 1401, a top beam 1402 and a bottom beam 1403, a connecting plate 1404 is welded at the tail end of the vertical column 1401, and the vertical column 1401 and a base substrate 1405 of the first-layer module unit are connected through the connecting plate 1404.

Specifically, the building modular unit is assembled from at least four columns 1401, with the lower column sections of the upper modular units and the upper column sections of the lower modular units being interconnected. The four upright posts have the same structure. In other embodiments, the number of the pillars is not limited to 4, and may be more than 6.

The lower end of the column of the second layer module unit 1408 and the upper end of the column of the first layer module unit are provided with a connecting plate 1404 by welding, and two beam-column connecting node plates 1406 are respectively arranged above the connecting plate 1404 at the lower end of the column at intervals. An H-shaped bottom beam is fixed between the two beam-column connecting gusset plates 1406 by welding. And an ALC floor is laid on the bottom beam.

The foundation connection mode of the existing module building generally adopts the welding fixation of a first-layer module unit and a module corner fitting, a base or a foundation base, belongs to rigid connection, and the control of the installation level elevation of foundation bases of different columns of the same module unit is difficult. Because the corner fittings and the basic embedded plate or the base are directly welded, when the corner fittings and the basic embedded plate or the base are reused, the corner fittings and the basic embedded plate or the base need to be cut and damaged, and the problem of low reuse rate of the module unit is caused. The field welding space is narrow, holes need to be reserved on the basis or on the inner sides of the module units for operation, the structure and the connectivity of decoration are affected, and the workload of subsequent plugging and decoration repair is increased. This embodiment therefore provides a modular building for a bolted connection, comprising:

the bolt connecting device 1407 is pre-embedded on the concrete foundation base 1405;

the first floor module unit 1409 is connected with the concrete foundation base 1405 of the module building through the bolt connecting device 1407.

The bolt connecting device is described in any technical features applicable to the same embodiment, and the same description is not repeated.

The modular units are interconnected at the construction site to form an integrated modular building. The modular building comprises a plurality of module units which are connected with each other, each module unit comprises a plurality of stand columns, a plurality of top beams and a plurality of bottom beams, the top beams are connected with the upper parts of the stand columns, the bottom beams are connected with the lower parts of the stand columns, top end connecting plates are arranged at the upper ends of the stand columns, bottom end connecting plates are arranged at the lower ends of the stand columns, and the top end connecting plates and the bottom end connecting plates are perpendicular to the axes of the stand columns.

As shown in fig. 15A and 15B, two modular units to be connected, one modular unit comprises an upright 1501 and the other modular unit comprises an upright 1502, wherein the upper parts of the uprights 1501 and 1502 are connected with top beams 1503 and 1504 and the lower parts of the uprights are connected with bottom beams 1505 and 1506, and the top ends of the uprights are provided with top end connecting plates 1507,1508, and the bottom ends of the uprights are provided with bottom end connecting plates 1509,1510. The area of the top and bottom connector panels 1507,1508, 1509,1510 is greater than the cross-sectional area of the uprights 1501, 1502.

First beam-column connecting node plates 1511 and 1512 are fixed below the top end connecting plate 1507,1508, the first beam-column connecting node plates 1511 and 1512 are rectangular, holes in the middle are formed in the shape of the columns 1501 and 1502, the holes are sized to freely penetrate through the columns, the columns 1501 and 1502 penetrate through the holes and are welded with the first beam-column connecting node plates 1511 and 1512, and the first beam-column connecting node plates 1511 and 1512 are parallel to the top end connecting plate 1507,1508. The top end connecting plate 1507,1508 and the first beam-column connecting node plates 1511, 1512 are welded and fixed to the upper flange plate and the lower flange plate of the top beams 1503, 1504 respectively, which are H-shaped steel.

Second beam-column connecting node plates 1513 and 1514 and third beam-column connecting node plates 1515 and 1516 are fixed above the bottom connecting plate 1509,1510, and the second beam-column connecting node plates 1513 and 1514 and the third beam-column connecting node plates 1515 and 1516 are respectively installed and fixed in the same way as the first beam-column connecting node plates 1511 and 1512 and are parallel to the bottom connecting plate 1509,1510. The second beam column connection node plates 1513 and 1514 and the third beam column connection node plates 1515 and 1516 are welded and fixed to the upper flange plates and the lower flange plates of the bottom beams 1505 and 1506, respectively, the bottom beams are made of H-shaped steel, and floors can be laid on the bottom beams.

As shown in fig. 15A, in one embodiment, in order to facilitate left-right connection of two adjacent module units in the same layer, a vertical connecting web 1517, 1518 is welded and fixed between the second beam-column connecting joint 1513, 1514 and the third beam-column connecting node plate 1515, 1516 of each upright column, two or more bolt holes are formed on each connecting web 1517, 1518, a connecting plate 1519 is attached to two adjacent connecting webs 1517, 1518, bolt holes corresponding to the bolt holes on the adjacent connecting webs 1517, 1518 are formed on the connecting plate 1519, and the two adjacent connecting webs 1517, 1518 and the connecting plate 1519 are fixedly connected through high-strength bolts and nuts. The connection plate 1519 may be a steel plate.

Two or more bolt holes are respectively formed at the outer sides of the first beam-column connecting node plates 1511, 1512 on each adjacent column of the two module units, two adjacent first beam-column connecting node plates 1511, 1512 are covered with a connecting plate 1520, bolt holes corresponding to the bolt holes on the adjacent first beam-column connecting node plates 1511, 1512 are formed on the connecting plate 1520, and the adjacent first beam-column connecting node plates 1511, 1512 and the connecting plate 1520 are fixedly connected through high-strength bolts and nuts. The connecting plate 1520 may be a steel plate.

As shown in fig. 15B, in another embodiment, in order to facilitate left-right connection of two adjacent module units in the same layer, a vertical connecting web 1517, 1518 is welded and fixed between the top end connecting plate 1507,1508 of each column and the first beam-column connecting node plate 1511, 1512 below, two or more bolt holes are formed on each connecting web 1517, 1518, a connecting plate 1519 is attached to two adjacent connecting webs 1517, 1518, bolt holes corresponding to the bolt holes on the adjacent connecting webs 1517, 1518 are formed on the connecting plate 1519, and the two adjacent connecting webs 1517, 1518 and the connecting plate 1519 are fixedly connected through high-strength bolts and nuts. The connection plate 1519 may be a steel plate.

Two or more bolt holes are respectively formed at the outer sides of the second beam-column connecting node plates 1513, 1514 on each adjacent column of the two module units, a connecting plate 1520 covers the two adjacent second beam-column connecting node plates 1513, 1514, bolt holes corresponding to the bolt holes on the adjacent second beam-column connecting node plates 1513, 1514 are formed on the connecting plate 1520, and the adjacent second beam-column connecting node plates 1513, 1514 and the connecting plate 1520 are fixedly connected by high-strength bolts and nuts. The connecting plate 1520 may be a steel plate. Fig. 16 is a top view of a connection structure of adjacent second beam-column connecting gusset plates.

In other embodiments, the upper and lower portions of the column may be connected by connecting webs 1517 and 1518 in cooperation with a connecting plate 1519 or by a connecting plate 1520, for example, two or more bolt holes are formed on the outer sides of the first beam-column connecting node plates 1511 and 1512 and the second beam-column connecting node plates 1513 and 1514/third beam-column connecting node plates 1515 and 1516, respectively, and the adjacent beam-column connecting node plates and the connecting plate 1520 are fixedly connected by high-strength bolts and nuts. Alternatively, a vertical connecting web 1517, 1518 is welded and fixed between the top end connecting plate 1507,1508 and the first beam-column connecting node plate 1511, 1512 below and between the second beam-column connecting joint 1513, 1514 and the third beam-column connecting node plate 1515, 1516 or between the third beam-column connecting node plate 1515, 1516 and the bottom end connecting plate 1509,1510, and the two connecting webs 1517, 1518 and the connecting plate 1519 are connected with each other by high-strength bolts and nuts.

In another embodiment, spaced apart first 1511, 1512 and second 1513, 1514 beam connecting node plates are secured below the top connecting plates 1507,1508, and the first 1511, 1512 and second 1513, 1514 beam connecting node plates are welded to the upper and lower flange plates of a top beam 1503, 1504, respectively, which is H-section steel. Third beam-column connecting node plates 1515 and 1516 are fixed above the bottom end connecting plate 1509,1510, the bottom end connecting plate and the third beam-column connecting node plates 1515 and 1516 are respectively welded and fixed with the upper flange plate and the lower flange plate of a bottom beam 1505 or 1506, the bottom beam is H-shaped steel, and a floor can be laid on the bottom beam.

In order to facilitate left-right connection of two adjacent module units in the same layer, a vertical connecting web 1517, 1518 is welded and fixed between the first beam-column connecting node plate 1511, 1512 and the second beam-column connecting node plate 1513, 1514 of each upright column, two or more bolt holes are formed in each connecting web, a connecting plate 1519 is attached to two adjacent connecting webs 1517, 1518, bolt holes corresponding to the bolt holes in the adjacent connecting webs 1517, 1518 are formed in the connecting plate 1519, and the two adjacent connecting webs 1517, 1518 are fixedly connected with the connecting plate 1519 through high-strength bolts and nuts.

The third beam-column connection node plates 1515, 1516 on each adjacent column of the two module units are respectively formed with two or more bolt holes at the outer sides thereof, the adjacent two third beam-column connection node plates 1515, 1516 are covered with a connection plate 1520, the connection plate 1520 is formed with bolt holes corresponding to the bolt holes on the adjacent third beam-column connection node plates 1515, 1516, and the adjacent third beam-column connection node plates 1515, 1516 and the connection plate 1520 are fixedly connected by high-strength bolts and nuts.

Likewise, in the above structure, the positions of the connection webs 1517, 1518 and the connection plate 1520 may be interchanged, or the upper and lower portions of the column may be connected by the connection webs 1517, 1518 in cooperation with the connection plate 1519 or by the connection plate 1520.

The left module unit and the right module unit are connected by bolts through the upper part and the lower part of the upright post, and are approximately flexibly connected. When an earthquake or an accidental large load occurs, the modules are flexibly connected, so that slight deformation can be allowed to occur, partial energy is absorbed, and the damage degree of the earthquake to a structural system is reduced.

In one embodiment, in order to facilitate the connection between the upper layer module unit and the lower layer module unit, a plurality of bolt holes are formed around the top end connecting plate and the bottom end connecting plate of each upright column, the bolt holes of the bottom end connecting plate of the upright column of the upper layer module unit correspond to the bolt holes of the top end connecting plate of the upright column of the lower layer module unit, and when the connection is performed, high-strength bolts penetrate through the corresponding bolt holes to fixedly connect the upper layer upright column and the lower layer upright column.

The upper part and the lower part of the column are connected by steel plates with larger sections than the upright column, and friction type high-strength bolts are arranged around the steel plates for fixation, so that the column is stressed outside the column. The rectangular connecting plate with a larger cross section is additionally arranged, so that the friction stress surface of the connecting part of the stand column is correspondingly increased, and the stress between the stand columns is enhanced. The friction type high-strength bolt is selected, the relative sliding of the friction surfaces is used as main stress, and the shearing resistance and bearing capacity of the bolt rod piece can be used as safe storage of stress between columns, so that the stress characteristic of the connection part between the columns is enhanced.

When the module unit is assembled by the module units, the bolt fastening can not be carried out due to narrow local space. In order to solve the problem that a fastening bolt does not have an operation surface, the invention provides a nut fixing piece, and a nut is pre-installed by utilizing a nut fixing sleeve.

As shown in fig. 17, in one embodiment, the nut retainer of the present invention includes a nut retainer 1701 that nests on the outside of the nut 1702, the nut retainer 1701 having an internal shape that matches the external shape of the nut 1702. The nut fixing sleeve 1701 is embedded outside the nut 1702 in advance at a position with a small or no working surface and is welded and fixed with a steel member 1703 (such as a top end connecting plate, a bottom end connecting plate, a connecting web plate, a connecting plate and the like), and the free rotation of the nut can be limited because the internal shape of the nut fixing sleeve is matched with the external shape of the nut.

In one embodiment, the nut 1702 is a hex high-strength bolt nut and the interior of the nut retainer case 1701 has a space that matches the shape of the nut 1702 to secure the nut 1702 in the space. Preferably, a washer (not shown) may be disposed between the nut 1702 and the steel member 1703.

The existing bolt fastening technology is that a nut is usually fixed by a spanner or a manual work at one end, a bolt rod is screwed in by rotating the other end, and after the bolt rod is screwed in and fixed, the bolt fastening is finished. This bolt fastening method requires operations at both ends. When the working surface is small or there is no working surface, the bolt cannot be fastened at that portion, and the operation is inconvenient. When the nut fixing piece is adopted, the bolt can be fastened even if no operation space is arranged on one side of the nut, and the bolt can be fastened only by drilling the screw into the reserved part of the nut. When the bolt is disassembled, only the screw rod is screwed by a spanner.

The method solves the defect that no operation space is available for bolt fastening. The bolt fastening is convenient, and the construction is simple. Any part assembled by the module units can be connected by bolts according to design requirements. When the modular building needs to be disassembled, moved and reused, only the bolt rod needs to be screwed. Therefore, the nut is pre-fixed by using the fixed nut sleeve, and the bolt is convenient to disassemble and assemble.

As shown in fig. 18, in one embodiment, in order to facilitate accurate alignment of the upper module unit and the lower module unit, a positioning member 1802 is disposed on the top end connection plate 1801 of the lower module unit, and the positioning member 1802 may be located at the center of the top end connection plate 1801. The bottom end connecting plate 1803 of the upper module unit is formed with a positioning hole 1804 corresponding to the positioning member 1802.

As shown in fig. 19, in one embodiment, the positioning member 1802 includes, from bottom to top, a first cylindrical section, a second cylindrical section, and a frustum, and the diameter of the first cylindrical section may be greater than or equal to the diameter of the second cylindrical section. The first cylinder section is located in a hole of the top end connecting plate 1801, the height of the first cylinder section is equal to the thickness of the top end connecting plate 1801, the lower portion of the first cylinder section is fixed in the hole through welding, the second cylinder section and the cone frustum body expose out of the top end connecting plate 1801, the height of the second cylinder section is equal to or larger than the thickness 1803 of the bottom end connecting plate, and the diameter of the second cylinder section can be slightly smaller than the diameter of a positioning hole of the bottom end connecting plate 1803.

The number of the positioning members 1802 and the positioning holes 1804 is one or more. In one embodiment, the number of positioning members 1802 is one, and is located at the center of the top end connecting plate 1801. Correspondingly, the number of the positioning holes 1804 is also one, and the positioning holes are located in the center of the bottom end connecting plate 1803.

During installation, the truncated cone body of the positioning component 1802 firstly initially extends into the positioning hole 1804 of the bottom end connecting plate 1803 of the upper module unit, and after each positioning hole 1804 is aligned to the corresponding positioning component 1802, the module units are completely hung, so that accurate alignment of the upper module unit and the lower module unit is realized.

According to the invention, the positioning component and the positioning hole are adopted to realize accurate alignment of the upper layer module unit and the lower layer module unit, the installation is convenient, the positioning is accurate, and the verticality of the upper layer module unit and the lower layer module unit can be ensured.

Correspondingly, the invention also provides a connecting method of the modular building, which comprises the connection of the module units on the same floor and the connection of the module units on the upper floor and the lower floor.

The connection of the module units on the same layer comprises the upper connection and the lower connection of the upright posts. When the upper parts of the stand columns are connected, firstly, a first connecting web is fixedly welded on one side adjacent to the second stand column between the first beam-column connecting node plate of the first stand column and the top end connecting plate, a second connecting web is fixedly welded on one side adjacent to the first stand column between the first beam-column connecting node plate of the second stand column and the top end connecting plate, and then the first connecting web and the second connecting web are simultaneously connected with a connecting plate through bolts. Or the upper parts of the columns do not adopt the connection mode, two or more bolt holes are respectively formed in the first beam-column connection node plate of the first column and the first beam-column connection node plate of the second column, and then the first beam-column connection node plate of the first column and the first beam-column connection node plate of the second column are simultaneously in bolt connection with the other connection plate.

When the lower parts of the stand columns are connected, firstly, a third connecting web is fixedly welded on one side adjacent to the second stand column between the second beam column connecting node plate of the first stand column and the third beam column connecting node plate, a fourth connecting web is fixedly welded on one side adjacent to the first stand column between the second beam column connecting node plate of the second stand column and the third beam column connecting node plate, and then the third connecting web and the fourth connecting web are simultaneously connected with a connecting plate through bolts. Or the lower part of the upright post does not adopt the connection mode, but two or more bolt holes are respectively formed on the second beam-column connection node plate of the first upright post and the second beam-column connection node plate of the second upright post, and then the second beam-column connection node plate of the first upright post and the second beam-column connection node plate of the second upright post are simultaneously in bolt connection with the other connection plate.

As shown in fig. 15B, in the connection of the module units in the same layer, two or more bolt holes are formed on the outer sides of the second beam-column connection node plates 1513 and 1514 of each upright 1501 and 1502 to be connected, respectively, and a vertical connection web 1517 and 1518 is welded and fixed between the top end connection plate 1507,1508 of each upright 1501 and 1502 to the first beam-column connection node plates 1511 and 1512 below the top end connection plate, and two or more bolt holes are formed on the connection webs 1517 and 1518.

When two module units are connected, the two module units on the same layer are placed to a predetermined position by a lifting tool, a connecting plate 1520 is covered on the second beam-column connecting node plates 1513, 1514 of the two uprights 1501, 1502 to be connected, bolt holes corresponding to the bolt holes on the adjacent second beam-column connecting node plates 1513, 1514 are formed on the connecting plate 1520, and then the adjacent two second beam-column connecting node plates 1513, 1514 are fixedly connected to the connecting plate 1520 by using high-strength bolts and nuts. Another connecting plate 1519 is attached to two adjacent connecting webs 1517 and 1518, bolt holes corresponding to the bolt holes on the two adjacent connecting webs 1517 and 1518 are formed in the connecting plate 1519, and then the two adjacent connecting webs 1517 and 1518 are connected with the connecting plate 1519 by high-strength bolts and nuts.

And repeating the operations until the connection of all the same-layer module units is completed.

In the installation of the upper and lower layer module units, an upper layer module unit is hoisted, so that the bottom end connecting plate of the upright column of the upper layer module unit is positioned above the top end connecting plate of the upright column of the lower layer module unit, the bolt hole of the bottom end connecting plate is superposed with the bolt hole of the top end connecting plate, and then the upper layer module unit is put down to determine the final position. And then fixing the top end connecting plate of the lower layer module unit and the bottom end connecting plate of the upper layer module unit by using high-strength bolts and nuts.

When another upper module unit is installed, the above operations are repeated, the other upper module unit and the corresponding lower module unit are fixed through high-strength bolts and nuts, and the two adjacent upper module units are connected by adopting the above mode.

When a new module unit is superposed on the upper module unit, the operation is carried out according to the same mode until the installation of all the module units is finished.

In one embodiment, because the working surface is small, a nut retainer is nested on the outside of the nut for ease of handling, and the inside shape of the nut retainer matches the outside shape of the nut. Before connection, the nut fixing sleeve is nested outside the nut and is welded and fixed with the top end connecting plate or the bottom end connecting plate. In addition, the nut fixing sleeve can be welded and fixed on the connecting web plate or the connecting plate.

In one embodiment, in order to facilitate accurate alignment of the upper module unit and the lower module unit, a positioning member is disposed on the top end connecting plate of the lower module unit, and the positioning member may be located at the center of the top end connecting plate. And a positioning hole corresponding to the positioning part is formed on the bottom end connecting plate of the upper layer module unit. During the installation of the upper and lower layer module units, the upper layer module unit is lifted by a lifting appliance, so that the positioning hole in the middle of the bottom end connecting plate of the upright column of the upper layer module unit is sleeved into the positioning part in the middle of the top end connecting plate of the upright column of the lower layer module unit, and then the upper layer module unit is put down to determine the final position. In the process, it is ensured that each positioning hole is sleeved in the positioning part.

Fire protection is required during the connection of the modular units. After the existing module units are connected, the top beam and the bottom beam between the upper module unit and the lower module unit are almost contacted. Because steel structural member carries out fire prevention fire-resistant processing and needs the corresponding fire retardant coating of parcel, but current module unit connected mode does not do enough reservation space between connecting the back beam and carries out fire prevention processing, has very big fire prevention hidden danger. Accordingly, in one exemplary embodiment of the present invention, a fire boundary wall apparatus is provided.

FIG. 20 is a schematic view of a fire-limiting wall apparatus according to an embodiment of the present invention. As shown in fig. 20, the fire-proof boundary wall plate of the present embodiment is disposed between the top beam 2006 of the lower module unit and the bottom beam 2007 of the upper module unit, and includes: a fire-rated wall plate 2009, and a fire-rated material 2011. The fire-proof boundary wall plate 2009 is an angle steel and is connected to the upper part of the top beam or the lower part of the bottom beam through welding. The top beam 2006 of the lower modular unit and the bottom beam 2007 of the upper modular unit are boundaries of fire zones, and fire zone partitions are arranged at the boundaries, so that different closed fire zones are formed in the plane layout of the building. Therefore, a gap is provided between the upper modular unit top beam 2006 and the upper modular unit bottom beam 2007, the beam member and the continuous fire-barrier wall plate 2009 are fully wrapped with the fire-proof material 2011, the space between the beams is completely filled, and a sealed space is formed in the same fire-proof partition.

Specifically, the beam structure is fixedly connected with the upright column by adopting a horizontal position, in which the lower surface of the bottom beam 2007 is higher than the bottom end connecting plate 2005 of the upright column 2008 of the upper module unit; or the upper surface of the top beam 2006 is lower than the horizontal position of the top connecting plate 2004 of the lower modular unit column 2008 for connection.

The upper module unit bottom beams 2007 and the lower module unit top beams 2006 are H-shaped steel beams. Connecting plates are welded at the lower end of the upright column 2008 of the upper-layer module unit and the upper end of the upright column 2008 of the lower-layer module unit, and the upper connecting plate and the lower connecting plate are fixed through bolts and nuts. In an embodiment, a first beam-column connecting plate 2001 is arranged below a connecting plate at the upper end of a vertical column 2008, a second beam-column connecting plate 2002 and a third beam-column connecting plate 2003 which are spaced apart are respectively arranged above a connecting plate at the lower end of the vertical column 2008, and an H-shaped steel beam is fixed between the second beam-column connecting plate 2002 and the third beam-column connecting plate 2003 through welding to serve as a bottom beam 2007; an H-shaped steel beam is fixed between the upper end connecting plate of the upright column 2008 and the first beam column connecting plate 2001 through welding to serve as a top beam 2006, and a floor 2010 is laid on the bottom beam 2007. Therefore, the top beam 2006 of the lower modular unit and the bottom beam 2007 of the upper modular unit are separated from each other to form a gap of a certain height. The gap between the lower modular unit top beam 2006 and the upper modular unit bottom beam 2007 is a space less than 200 mm. Preferably, a gap with a height of less than 200mm is formed between the top beam 2006 and the bottom beam 2007 of the lower modular unit as a construction space, and preferably, the height of the gap may be 50mm, 80mm, 100mm, 120mm, 150mm or 180 mm. Through the construction space, the problems that the top beam 2006 and the bottom beam 2007 cannot wrap refractory materials and the like can be solved. Since the upper surface of the top beam 2006 and the lower surface of the bottom beam 2007 are structures separated from each other, the top beam 2006 and the bottom beam 2007 are not closely connected. The separation of the top and bottom beams 2006, 2007 from one another allows for complete wrapping around the top and bottom beams 2006, 2007 while wrapping refractory material within the factory.

In this embodiment, the lower modular unit is continuously disposed on the upper portion of the top beam 2006 of the lower modular unit by the fire-boundary-wall plate 2009; in other embodiments, the fire boundary wall 2009 may be placed continuously below the bottom beams 2007 of the upper module units. And a first beam-column connecting plate 2001 and a second beam-column connecting plate 2002 are fixedly connected with a top beam 2006, and a bottom end connecting plate 2005 and a third beam-column connecting plate 2003 are fixedly connected with a bottom beam 2007, so that a method for forming an inter-beam gap that the upper surface of the top beam sinks and the lower surface of the bottom beam is flush with the lower end connecting plate 2005 can be realized.

The fireproof material 2011 is used for wrapping the continuous fireproof boundary wall plate 2009 and the beam structure and is filled between the lower-layer modular unit top beam 2006 assembly and the upper-layer modular unit bottom beam 2007 assembly, so that the fireproof material is tightly attached to the lower-layer modular unit top beam 2006 assembly and the upper-layer modular unit bottom beam 2007 assembly; preferably, the fireproof material 2011 also fills the space between the connecting plate at the lower end of the upper module unit upright 2008 and the third beam-column connecting plate 2003; or the space between the top end connecting plate 2004 and the first beam-column connecting plate 2001 of the lower modular unit is filled.

The fire-boundary wall plate 2009 serves as a base layer of fire-retardant material 2011 attached to the fire-retardant partition wall to form a continuous fire-retardant partition airtight plate. The fire partition sealing plate is arranged at the partition position of the fire partition and used for blocking fire and smoke generated by combustion and enabling each fire partition to form a sealed space so as to prevent fire from spreading. In a modular unit manufacturing plant, the fire-rated boundary panels 2009, lower modular unit top beams 2006, and upper modular unit bottom beams 2007 are fully wrapped with the fire-rated material 2011. The upper flange plate of the top beam 2006 and the lower flange plate of the bottom beam 2007 can be completely covered with the fireproof material 2011.

Optionally, the cross-sectional shape of the cylinder is rectangular, square or circular. The cross section of the connecting plate is rectangular, square or circular. The connecting plate is connected to the column 2008 by welding. There are 4 bolt holes around the connecting plate for going on the fixed connection of unit from top to bottom through the bolt.

In the existing modular building, since the upper surface of the top beam 2006 of the lower modular unit and the lower surface of the bottom beam 2007 of the upper modular unit are generally connected together, the wrapping of the refractory material needs to be performed after the upper and lower surfaces are connected. In this case, since the refractory can be wrapped only on the side surfaces of the top beam 2006 and the bottom beam 2007, a sealed fireproof space cannot be formed. However, in the present embodiment, since the upper surface of the top beam 2006 and the lower surface of the bottom beam 2007 are separated from each other, the refractory material can be sufficiently wrapped around the top beam 2006 and the bottom beam 2007 in the modular unit manufacturing factory, and the refractory material wrapping work at the construction site is not performed any more.

The top beam 2006 and the bottom beam 2007 are H-shaped steel beams, and the top beam 2006, the bottom beam 2007 and the upright column 2008 are connected in a combined mode through friction type high-strength bolts and welding. Specifically, the first beam-column connecting plate 2001 is connected with a lower flange plate of the top beam 2006 in a welding manner, the top end connecting plate 2004 is connected with an upper flange plate of the top beam 2006 in a welding manner, the second beam-column connecting plate 2002 is connected with an upper flange plate of the bottom beam 2007 in a welding manner, and the third beam-column connecting plate 2003 is connected with a lower flange plate of the bottom beam 2007 in a welding manner; or the first beam-column connecting plate 2001 is welded with the upper flange plate of the top beam 2006, the second beam-column connecting plate 2002 is welded with the lower flange plate of the top beam 2006, the third beam-column connecting plate 2003 is welded with the upper flange plate of the bottom beam 2007, and the bottom end connecting plate 2005 is welded with the lower flange plate of the bottom beam 2007.

Further, the lower-layer module unit top beam 2006 assembly comprises two flange plates and a top beam 2006 web plate between the two flange plates, a first beam-column connecting web plate is welded between the connecting plate at the upper end of the upright column 2008 and the first beam-column connecting plate 2001, and the top beam 2006 web plate is connected with the first beam-column connecting web plate through bolts; the bottom beam 2007 assembly of the upper-layer module unit comprises two flange plates and a bottom beam 2007 web plate between the two flange plates, a second beam-column connecting web plate is welded between a second beam-column connecting plate 2002 and a third beam-column connecting plate 2003 of the upright column 2008, and the bottom beam 2007 web plate is connected with the second connecting beam-column web plate through bolts; the outer sides of the first connecting web and the second connecting web can be wrapped with fireproof materials 2011.

The angle steel is welded in the gap between the top beam and the bottom beam, and the top beam, the bottom beam and the angle steel are wrapped with the fireproof materials to form the closed fireproof partition sealing plate, so that different fireproof partitions are formed in the plane layout of the building, and a sealed space is formed in the same fireproof partition. Once a fire disaster occurs, the beam structure and the angle steel are fully wrapped by the fireproof materials, and the formed fireproof subarea airtight plate can prevent a fire source from spreading to another fireproof subarea, so that the fire spread is effectively prevented.

In one exemplary embodiment of the present invention, a modular unit employing a fire-boundary wall is provided. The module unit that this embodiment adopted fire boundary wall includes: at least four upright posts as a support structure for the modular unit; the beam structure comprises a top beam and a bottom beam, is horizontally arranged between the upright posts and connects the upright post structures; the connecting positions of the top beam and the bottom beam with the upright column are configured to enable a gap with a preset height to be formed between the lower surface of the bottom beam and the bottom end of the upright column or between the upper surface of the top beam and the top end of the upright column, and the gap is used for containing fireproof materials.

Further, the module unit adopting the fire-boundary wall further comprises: a fire-proof boundary wall plate disposed in the gap; and fireproof materials are filled between the lower-layer module unit top beam assembly and the upper-layer module unit bottom beam assembly, and the fireproof materials are tightly attached to the lower-layer module unit top beam assembly and the upper-layer module unit bottom beam assembly. The fireproof boundary wall plates are continuously arranged on the upper portion of the top beam or the lower portion of the bottom beam and used for wrapping a fireproof material base layer, and continuous fireproof partition airtight plates are formed to achieve fireproof partition.

Any technical features that can be applied to the same embodiment are described herein, and the same description need not be repeated.

In one exemplary embodiment of the present invention, a modular building employing a fire-boundary wall is provided. A modular building employing a fire boundary wall comprising: at least two floors; each floor comprises at least one module unit, each module unit comprises a top beam, a bottom beam and at least four upright columns serving as upright columns of a supporting structure, the bottom end of each upright column is provided with a bottom end connecting plate, the top end of each upright column is provided with a top end connecting plate, and the bottom end connecting plate of each upright column in the upper module unit is connected with the top end connecting plate of each upright column in the lower module unit; wherein, a gap with a preset height is arranged between the top beam of the lower module unit and the bottom beam of the upper module unit and is used for accommodating fireproof materials.

Further, the modular building that adopts fire boundary wall still includes: the fireproof boundary wall plate is arranged in the gap; and a gap between the lower-layer module unit top beam assembly and the upper-layer module unit bottom beam assembly is filled with a fireproof material, and the fireproof material is tightly attached to the lower-layer module unit top beam assembly and the upper-layer module unit bottom beam assembly. The fireproof boundary wall plates are continuously arranged on the upper portion of the top beam or the lower portion of the bottom beam and used for wrapping a fireproof material base layer, and continuous fireproof partition airtight plates are formed to achieve fireproof partition.

Further, after the main structure of the modular building is installed, there are floor gaps with a certain distance between the module units, so that the floor gaps need to be processed.

As shown in fig. 21A, the present invention provides a modular building using metal plates to splice floor joints, the modular building may be one or more floors and is formed by connecting a plurality of module units, a floor gap 2103 is provided between a first floor 2101 of a first module unit and a second floor 2102 of a second module unit on the same floor, a V-shaped metal plate 2104 is installed in the floor gap 2103, edges 2105 are formed at two sides of the V-shaped metal plate 2104, the edges 2105 are lapped at two sides of the floor gap, and cement mortar is filled above the V-shaped plate 2104.

The V-shaped metal plate 2104 has a certain elasticity, and the opening width d in a natural state should be larger than the width of the floor gap 2103, so that the V-shaped metal plate 2104 can generate a certain tension in the floor gap 2103 to be clamped in the floor gap 2103, thereby offsetting a small displacement between the module units and not generating a new crack.

In one embodiment, the V-shaped metal plate 2104 is a V-shaped steel plate. As shown in fig. 21B, the V-shaped steel plate is formed by folding a right-angle steel plate in half, and a rim 2105 is formed at the end of each of the two legs of the right-angle steel plate, and extends along the outside of the right angle. The width d of the right-angle side (i.e. the side plate of the V-shaped plate) is determined according to the thickness of the floor slab, preferably equal to the thickness h of the floor slab, the width of the side is determined according to the width of the floor slab gap, preferably, the sum of the widths of the two side sides of the side plate is greater than or equal to the width of the floor slab gap, and the length of the right-angle steel plate is equal to the length of the floor slab. For example, the thickness of the floor slab can be 50-150mm, the gap of the floor slab can be 10-40mm, the width of the right-angle side of the right-angle steel plate can be 50-150mm, and the width of the edge can be 5-15 mm.

In one embodiment, the floor slab of the module unit is a 100mm ALC (automatic light weight concrete) prefabricated floor slab, and the ALC prefabricated floor slab is directly installed and fixed on the upper surfaces of the main beams and the secondary beams. After the module units are assembled, floor slab gaps of 30mm are formed at the joint parts of the floor slabs among the module units. A rectangular steel plate with the size of 100 multiplied by 100mm is manufactured, and the end part of the rectangular side of the steel plate is provided with a short side with the size of 10 mm. In the seam that ALC precast floor was placed to the roll extrusion V type to right angle steel sheet, the border overlap joint on ALC precast floor on the right angle limit, and finally V-arrangement steel sheet top is irritated solid cement mortar and is sealed again.

The invention adopts right-angle steel plates to fill up the floor slab joints among the module units. Because the right-angle steel plate is folded into a V shape and then is put into a floor slab gap, the right-angle steel plate is clamped in the slab gap through the restoring force of the right-angle steel plate, and a fixing mode is not needed to be additionally arranged. The edges of the ends of the right-angle sides are clamped at the two sides of a floor slab gap, so that the folded V-shaped steel plate after being installed has certain bearing capacity. The height of the V-shaped steel plate is consistent with that of the floor slab, and the V-shaped steel plate is folded into a V-shaped steel plate to be filled with cement mortar, and the gap is filled with the steel plate with the same thickness as the ALC plate.

The invention utilizes the V-shaped steel plate to fill the ALC floor slab gap, and has the advantages of simple and rapid construction, good ALC slab gap sealing effect, high bearing capacity and the like.

For multi-storey modular buildings, stairways need to be assembled within the building. In order to minimize the field construction, the stair is assembled in the same module unit. Therefore, the invention provides a modular building adopting temporary fixed stairs, which comprises an upper layer modular unit and a lower layer modular unit, wherein the stairs in the lower layer modular unit comprise two stair sections, a platform is arranged at the connecting part of each stair section, and the platform can be integrally formed with each stair section or independently arranged with each stair section. The lower stair section is installed in a module unit according to the design, the upper stair section is temporarily fixed in the module unit, and after the upper module unit and the lower module unit are assembled, the upper stair section is installed at a preset position and connected with the lower stair section.

When temporarily fixing the upper stair section, a temporary fixing beam can be arranged in the modular unit, the lower end of the upper stair section is fixed on the temporary fixing beam, and the upper end of the upper stair section can be temporarily fixed on the top beam of the modular unit. The temporary fixing beam can be fixed at a corresponding height position between the upright posts of the module unit.

In another embodiment of the invention, as shown in fig. 22, the staircase between adjacent floors is divided into an upper landing 2301 and a lower landing 2302, the bottom of the upper landing and the top of the lower landing being integrally formed with a landing 2303, 2304, respectively. The bottom of the lower stair section is fixed on the bottom beam of the modular unit, the platform 2304 at the top of the lower stair section is fixed on the middle stair beam 2305, and two ends of the middle stair beam are respectively and fixedly connected on the two upright posts of the modular unit. A temporary fixing beam 2306 is provided under the middle stair beam 2305, a platform at the bottom of the upper stair section is temporarily fixed on the temporary fixing beam 2306, and the upper end of the upper stair section 2301 is temporarily fixed on the top beam of the modular unit. The two ends of the temporary fixing beam are fixed on the upright posts of the module unit.

The middle stair beam 2305 is reserved with a mounting portion for fixing the bottom of the upper stair section 2301 after the upper module unit and the lower module unit are connected, and the bottom beam of the upper module unit is reserved with a mounting portion for fixing the top of the upper stair section 2301 after the upper module unit and the lower module unit are connected.

Correspondingly, the invention provides a method for installing a prefabricated staircase in a modular building, which comprises the following steps:

fixing the bottom of the lower stair section on a bottom beam of the lower layer module unit, and fixing the top of the lower stair section on a middle stair beam;

In one embodiment, after the upper and lower modular units are assembled, the upper stair section 2301 is lifted and the platform 2303 at the bottom of the upper stair section is secured to the middle stair beam 2305 at the level of the platform 2304 at the top of the lower stair section, and then the upper end of the upper stair section is secured to the bottom beam of the upper modular unit. The stair after installation is shown in fig. 23.

In one embodiment of the invention, in the stairwell of the modular building, the stairway between adjacent floors is divided into an upper stair section and a lower stair section, a platform is arranged at the joint of the upper stair section and the lower stair section, the platform is fixedly connected with the middle stair beam, and two ends of the middle stair beam are respectively and fixedly connected with two upright posts of the modular unit. Two ends of the lower stair section are respectively fixed on a bottom beam and a platform of the module unit, and the top end of the lower stair section and the platform are on the same horizontal plane. The upper end of the upper stair section is temporarily fixed on the top beam of the modular unit, the lower end of the upper stair section is temporarily fixed on a temporary fixed beam, the temporary fixed beam is arranged below the middle stair beam, and two ends of the temporary fixed beam are fixed on the stand columns of the modular unit. After the modular units on the upper floor and the lower floor of the stairwell are assembled, the upper stairway section is lifted, the lower end of the upper stairway section is fixed on the platform, and the upper end of the upper stairway section is fixed on the bottom beam of the upper modular unit, so that the installation of the stairway is completed.

In some embodiments, the lower stair section is bolted at each end to the bottom sill and middle stair sill of a modular unit. The upper stair sections are also temporarily and finally secured with bolts. Of course, the lower and upper stair sections may be secured in other ways. A chain block pulley can be used when lifting the upper stair section.

The stair installation method provided by the invention can avoid the problems of inconvenient operation and the like when the modular building is assembled on the upper and lower floors on site, and can realize that all stair well module units are constructed in a factory. After the upper stair sections are temporarily fixed, the upper stair sections can pass through, so that the upper stair sections and the lower stair sections can be used as up-down transportation and passing channels in the assembly field. In addition, the stair are installed in the stairwell module unit in advance, and the defects that the operation space is insufficient and the construction cannot be carried out when the stair are installed in the later period are avoided.

The modular units of the modular building are processed in a factory and finished in indoor fine assembly, and only module units are assembled on site, so that the assembly efficiency is greatly improved.

The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A method of installing a prefabricated staircase in a modular building, said prefabricated staircase comprising a lower stairway section and an upper stairway section, said prefabricated staircase being installed in advance in stairwell module units of said modular building, said method of installation comprising:

a temporary fixing beam is arranged below the middle stair beam, the temporary fixing beam is fixed on the upright post of the lower modular unit, the bottom of the upper stair section is temporarily fixed on the temporary fixing beam, and the upper end of the upper stair section is temporarily fixed on the top beam of the lower modular unit;

2. The installation method of claim 1 wherein a chain block is employed in lifting the upper stair section.

3. Installation method according to claim 1, wherein the temporarily fixed upper stair sections are used for transportation and passage ways.

4. The method of installation according to claim 1, wherein the intermediate stair nosing is secured to a post of the lower modular unit.

5. The method of installing as claimed in claim 1, wherein the prefabricated staircase includes a platform secured to the intermediate staircase beam, the top of the lower staircase section being fixedly attached to the platform, and the bottom of the upper staircase section being fixedly attached to the platform when the upper staircase section is installed.

6. The method of installing as claimed in claim 1, wherein the top of the lower stair section includes a first platform secured to the intermediate stair stringer and the bottom of the upper stair section includes a second platform temporarily secured to the temporary securing stringer for fixedly connecting the second platform of the upper stair section to the intermediate stair stringer when the upper stair section is installed.

7. The installation method according to claim 1, wherein the upper stair sections are temporarily and finally fixed with bolts.