CN115749169A - Prefabricated staircase structure and installation method thereof - Google Patents

Abstract

The invention relates to a prefabricated staircase structure and an installation method thereof, which aim to solve the problem that a prefabricated staircase applied to a standard floor cannot be installed on a different floor. The prefabricated staircase structure comprises a prefabricated staircase and a prefabricated staircase, wherein the prefabricated staircase is positioned above a staircase beam; the reinforcing beam is positioned between the prefabricated staircase and the ladder beam; the prefabricated staircase comprises a prefabricated staircase body, a reinforcing beam, a prefabricated staircase body and a prefabricated staircase, wherein the reinforcing beam comprises a positioning mounting surface; a height difference is arranged between the positioning installation surface and the ladder beam; at least part of the structure of the reinforcing beam is used for connecting with the ladder beam. By adopting the prefabricated staircase structure and the installation method thereof, the prefabricated staircase can be installed on the staircase beam with the height difference.

Description

Prefabricated staircase structure and installation method thereof

Technical Field

The invention relates to the technical field of assembly type building construction, in particular to a prefabricated stair structure and an installation method thereof.

Background

In recent years, with the rapid development of prefabricated concrete structure buildings, the application range of the prefabricated concrete structure buildings is developed from the original multi-storey buildings and high-rise buildings to ultra-high-rise buildings, the prefabricated stairway structures are generally assembled on the ladder beams in the prefabricated buildings to realize the function of the stairway, and compared with the traditional cast-in-place stairway, the prefabricated stairway has the characteristics of high installation efficiency and high construction speed, so that the prefabricated stairway is widely applied to the prefabricated buildings.

However, there are often differential story height floors in a building that are higher than the standard story height floors based on the need for safety performance or use functions. For example, refuge floors are required to be arranged in a high-rise building with a super-limit, and the refuge floors are generally higher than the floors of a standard floor, namely floors with different floor heights. At this time, if the special prefabricated staircase is manufactured for the floors with different floor heights, a set of mold is required to be opened, so that the engineering cost is increased, the trouble is brought to production and construction, and the design concept is contrary to the standardized design concept of the fabricated building. If the prefabricated staircase that will be applied to standard floor height floor is applied to difference floor height floor, because there is the difference in height between prefabricated staircase and the ladder beam, can't realize the installation of prefabricated staircase.

Based on this, it is necessary to provide a prefabricated staircase structure and an installation method thereof for solving the problem that the installation of the prefabricated staircase cannot be realized due to the height difference between the prefabricated staircase and the staircase beam.

Disclosure of Invention

In one aspect, the present invention provides a prefabricated staircase structure, which can be installed on a staircase girder having a height difference therebetween.

The utility model provides a prefabricated staircase structure, includes prefabricated staircase and stiffening beam, prefabricated staircase is located ladder roof beam top, and the stiffening beam is located between prefabricated staircase and the ladder roof beam. The reinforced beam comprises a positioning mounting surface, the prefabricated staircase is positioned and mounted on the positioning mounting surface and the reinforced beam, and further, a height difference is arranged between the positioning mounting surface and the staircase beam. In addition, at least part of the structure of the strong beam is used for connecting with the ladder beam. Adopt stiffening beam to connect prefabricated staircase and ladder beam among this prefabricated staircase structure, wherein the stiffening beam provides the location installation face, sets up the difference in height between location installation face and the ladder beam, installs prefabricated staircase location on the location installation face to realized installing prefabricated staircase on the ladder beam that has the difference in height with it.

In one embodiment, the reinforcing beam includes a first mounting portion and a second mounting portion, the first mounting portion being in anchored connection with the second mounting portion. Further, the first installation portion is connected with the ladder beam anchor, or the second installation portion is connected with the ladder beam anchor. First installation department, second installation department and ladder roof beam form holistic atress structure to possess sufficient structural strength and rigidity, further guarantee the stability of prefabricated staircase installation.

In one embodiment, the first mounting portion includes a first rebar skeleton and the second mounting portion includes a second rebar skeleton. Wherein, along vertical direction, first framework of steel reinforcement protrusion sets up in second framework of steel reinforcement. Along the horizontal direction, second framework of steel reinforcement protrusion sets up in first framework of steel reinforcement. Wherein, first framework of steel reinforcement and second framework of steel reinforcement can be can dismantle the connection, also can be integrated into one piece setting. First, the first framework of steel reinforcement and the second framework of steel reinforcement that are connected have improved the wholeness of first installation department and second installation department to satisfy structural strength's requirement. Secondly, adopt the stiffening beam of this structure, not only can nimble adjustment prefabricated staircase's mounted position and installation form, can also change the relative position that sets up between first installation department and the second installation department through adjusting the relative position between first framework of steel reinforcement and the second framework of steel reinforcement, and then adapt to prefabricated staircase's height and shape, realize the accurate location installation of prefabricated staircase.

In one embodiment, the positioning installation surface comprises a first positioning installation surface, and the first positioning installation surface is positioned between the first installation part and the prefabricated staircase. Wherein, first location installation face is protruding to be equipped with a plurality of first positioning steel bars, a plurality of first positioning steel bars and a plurality of prefabricated hole location installation on the prefabricated stair. Through the cooperation of first spacer bar and prefabricated hole, further realized the accurate location to prefabricated stair.

In one embodiment, the positioning installation surface comprises a second positioning installation surface, and the second positioning installation surface is positioned between the second installation part and the prefabricated staircase. The second positioning installation surface is provided with a leveling layer, and the prefabricated staircase is installed on the leveling layer so as to be installed on a horizontal plane. The leveling layer is arranged, so that the installation stability of the prefabricated staircase can be improved, and the prefabricated staircase can be accurately placed in place.

In one embodiment, a gap is reserved between the prefabricated staircase and the first installation part, and a filling layer is arranged in the gap. The filling layer is arranged, so that the shock resistance of the prefabricated staircase structure can be improved, and the deformation of the prefabricated staircase and the reinforcing beam caused by climate temperature change can be eliminated.

In one embodiment, the second positioning installation surface is convexly provided with a plurality of second positioning reinforcing steel bars, and the second positioning reinforcing steel bars are installed with the prefabricated holes on the prefabricated staircase in a positioning mode. Through the cooperation of second positioning reinforcement and prefabricated hole, realize the accurate location to prefabricated stair.

In another aspect, the invention provides a method for installing a prefabricated staircase, which can be installed on a ladder beam with a height difference.

A prefabricated staircase installation method comprises the following steps: obtaining a stiffening beam and a ladder beam, wherein the stiffening beam comprises a positioning installation surface; connecting at least part of the structure of the reinforcing beam above the ladder beam so as to keep the height difference between the positioning installation surface of the reinforcing beam and the ladder beam; acquiring a prefabricated staircase; and positioning and installing the prefabricated staircase on the positioning installation surface so that the reinforcing beam is positioned between the prefabricated staircase and the staircase beam.

In one embodiment, the step of obtaining a reinforcement beam and a ladder beam, the reinforcement beam including a locating mounting surface comprises: acquiring the standard floor height, the difference floor elevation and the height of a prefabricated staircase installation section; calculating the height of the first installation part and the elevation of the second installation part according to the standard floor height, the difference floor height and the prefabricated staircase installation section height; the first installation part and the second installation part are connected to form the reinforcing beam, and the elevation of the second installation part is the height of the positioning installation surface.

Calculate the size that reachs first installation department and second installation department through the data that acquire, the prefabricated staircase that the adaptation was installed of being convenient for realizes the accurate installation of prefabricated staircase.

In one embodiment, the step of attaching at least part of the structure of the reinforcing beam above the ladder beam to maintain a height difference between the locating attachment surface of the reinforcing beam and the ladder beam comprises: acquiring a first steel reinforcement framework with the same height as the first installation part; acquiring a second steel bar framework; binding and overlapping the first steel reinforcement framework and the second steel reinforcement framework above the steel reinforcement framework of the ladder beam; the first steel bar framework is installed on the second steel bar framework in a protruding mode in the vertical direction, and the second steel bar framework is installed on the first steel bar framework in a protruding mode in the horizontal direction; the elevation of the second steel bar framework is the elevation of the second installation part; and carrying out concrete pouring on the first steel reinforcement framework, the second steel reinforcement framework and the steel reinforcement framework of the ladder beam, wherein the first installation part is obtained after the first steel reinforcement framework is poured, and the second installation part is obtained after the second steel reinforcement framework is subjected to concrete pouring.

Make first installation department, second installation department and ladder roof beam connect as overall structure through above-mentioned step, satisfy installation prefabricated staircase required structural strength and rigidity, further guarantee the stability of prefabricated staircase installation.

Drawings

FIG. 1 is a schematic structural view of a prefabricated staircase structure of the present invention;

FIG. 2 is a schematic structural view of another embodiment of the reinforcement beam of the present invention;

FIG. 3 is a schematic structural view of an embodiment of the prefabricated staircase positioning installation of the present invention;

FIG. 4 is a schematic structural view of another embodiment of the prefabricated staircase positioning installation of the present invention;

fig. 5 is a flow chart showing steps of the installation method of the prefabricated staircase according to the present invention.

Reference numbers:

100-ladder beam; 110-a ladder beam reinforcement cage; 200-a stiffening beam; 300-prefabricating the stairs; 310-prefabricating holes; 320-prefabricated staircase installation sections; 210-positioning a mounting surface; 211-a first locating mounting surface; 212-a second locating mounting surface; 220-a first mounting portion; 230-a second mounting portion; 221-a first steel reinforcement cage; 222-vertical ribs; 231-a second steel reinforcement cage; 232-stirrup; 240-positioning the reinforcing steel bars; 241-first positioning steel bars; 242-a second spacer bar; 250-a leveling layer; 260-a filling layer; 2421-a thread section; 2422-nut; 311-first connection hole; 312 — a second connection hole; 313-a limiting surface; 314-reinforcing ribs; 270-a supplementary stage; 280-first horizontal plane.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, but are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the second feature or the first and second features may be indirectly contacting each other through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

In recent years, fabricated staircases are widely used, that is, prefabricated staircases of uniform types are manufactured in advance and applied to standard floors with floor heights matched with the prefabricated staircases, and a common method is to pre-embed a ladder beam on a wallboard or a floor slab and install the prefabricated staircases on the ladder beam to realize the function of the staircases. And in the actual work progress, often have with the above-mentioned unmatched floor in the prefabricated staircase height of unified model for prefabricated staircase can not the direct mount on the ladder roof beam.

Based on above-mentioned problem, this scheme provides a prefabricated staircase structure, can be applied to the difference floor with prefabricated staircase, promptly, can install prefabricated staircase on the ladder roof beam that has the difference in height with it. When the floor height of the difference floor is higher than that of the standard floor, the prefabricated staircase structure of the scheme is applied as an example, referring to fig. 1, the prefabricated staircase structure of the scheme comprises a prefabricated staircase 300 and a reinforcing beam 200, the prefabricated staircase 300 is located above a ladder beam 100, the reinforcing beam 200 is located between the prefabricated staircase 300 and the ladder beam 100, the prefabricated staircase 300 is located and installed on the reinforcing beam 200, and at least part of the reinforcing beam 200 is structurally connected to the ladder beam 100.

It should be noted that the present embodiment does not limit the specific structure and installation position of the mounted ladder beam 100, as long as the function of the ladder beam 100 can be achieved. Illustratively, the ladder beam 100 may be configured in a "Z" -shape, an "L" -shape, or a "1" -shape. Illustratively, the ladder beam 100 may be disposed at an end of a floor slab, or may be disposed directly at one side of a wall slab. The scheme does not limit the connection form between the ladder beam 100 and the floor slab or the wallboard, and only needs to realize the function of the ladder beam 100. The ladder beam 100 may be pre-embedded in a floor or a wall panel in advance, or may be integrally cast with the floor or the wall panel. Illustratively, the ladder beam 100 is pre-buried in the tip of floor, and ladder beam 100 includes ladder beam framework 110, and ladder beam framework 110 overlaps with the reinforcement banding that the floor tip stretches out to after pouring concrete, ladder beam 100 is connected as integral structure with the floor anchor.

In addition, the specific shape, size and type of the prefabricated staircase 300 are not limited by the scheme, as long as the function of the prefabricated staircase 300 can be realized. Illustratively, the prefabricated staircase 300 may be a beam staircase or a plate staircase.

Further, referring to fig. 1, the reinforcement beam 200 is provided with a positioning installation surface 210, and the prefabricated staircase 300 is positioned and installed on the positioning installation surface 210 and the reinforcement beam 200. Wherein, a height difference is arranged between the positioning installation surface 210 and the ladder beam 100, and the height difference is kept within a preset range. In order to ensure the installation stability and operability of the prefabricated staircase 300, the preset range may be 15mm-150mm. The specific setting direction and angle of the positioning and mounting surface 210 are not limited in the application, and the positioning and mounting of the prefabricated staircase 300 can be realized only by matching with the prefabricated staircase 300.

To further achieve the positioning and installation of the prefabricated staircase 300, the reinforcement beam 200 illustratively includes a first installation portion 220 and a second installation portion 230, which may be connected as a unitary stressed structure. The first mounting portion 220 protrudes from the second mounting portion 230 in the vertical direction. The second mounting portion 230 is disposed to protrude from the first mounting portion 220 in the horizontal direction. The concrete direction and position of setting up of this scheme to first installation department 220 and second installation department 230 do not restrict, as long as can with above-mentioned prefabricated stair 300 phase-match, the realization just has the structural strength who is used for supporting prefabricated stair 300 to the location installation of prefabricated stair 300 can.

For example, the first mounting portion 220 may be disposed along a vertical direction, and the second mounting portion 230 may be disposed along a horizontal direction, which form an included angle of 90 °. Or, the included angle between the first installation part 220 and the second installation part 230 may be any angle between 0 ° and 180 °, and it is only necessary to match with the prefabricated staircase 300 to stably install the prefabricated staircase 300.

For example, referring to fig. 1, the second mounting portion 230 may be disposed across a middle portion of the first mounting portion 220. At this time, both ends of the first installation part 220 protrude from the second installation part 230, one end of the second installation part 230, which is close to the prefabricated staircase 300, protrudes from the first installation part 220, and the first installation part 220 and the second installation part 230 are constructed together in a "T" shape. For example, referring to fig. 2, the second installation part 230 may also be transversely disposed at an end of the first installation part 220, one end of the first installation part 220 close to the prefabricated staircase 300 protrudes from the second installation part 230, one end of the second installation part 230 close to the prefabricated staircase 300 protrudes from the first installation part 220, and the first installation part 220 and the second installation part 230 are jointly configured into an "L" shape.

By adopting the reinforcing beam 200 with the structure, the installation position and the installation form of the prefabricated staircase 300 can be flexibly adjusted, and the relative arrangement position between the first installation part 220 and the second installation part 230 can be adjusted to adapt to the height and the shape of the prefabricated staircase 300, so that the precise positioning and installation of the prefabricated staircase are realized.

Because this scheme is applied to in the prefabricated building, in order to possess sufficient structural strength, rigidity and stability, first installation department 220 and second installation department 230 interconnect form holistic atress structure. Illustratively, the first mounting portion 220 is in anchored connection with the second mounting portion 230.

Further, the reinforcing beam 200 is connected to the ladder beam 100 to form an integral stress structure, so as to ensure the installation stability of the prefabricated staircase 300. Referring to fig. 1 and 2, for example, the reinforcing beam 200 may be anchored to the ladder beam 100 by the first mounting portion 220. Wherein, the one end of the first installation portion 220 far away from the prefabricated staircase 300 is connected with the ladder beam 100 in an anchoring manner, the second installation portion 230 is transversely arranged in the middle of the first installation portion 220, and the second installation portion 230 is connected with the first installation portion 220 in an anchoring manner. Illustratively, the reinforcing beam 200 may also be anchored to the ladder beam 100 by the second mounting portion 230. Wherein, the second installation part 230 is connected to the ladder beam 100 by anchoring at the end far away from the prefabricated staircase 300, and the first installation part 220 is located right above the ladder beam 100 and connected to the second installation part 230 by anchoring. In this way, the first mounting portion 220, the second mounting portion 230 and the ladder beam 100 form an integrated stress structure, and the stability of the installation of the prefabricated staircase 300 is ensured.

For example, referring to fig. 1 and 2, the reinforcing beam 200 is a cast-in-place concrete structure, in order to restrain concrete, improve the integrity of the reinforcing beam 200 and meet the requirement of structural strength, the first installation part 220 includes a first steel reinforcement framework 221, the second installation part 230 includes a second steel reinforcement framework 231, and after the first steel reinforcement framework 221 and the second steel reinforcement framework 231 together construct the shape preset by the reinforcing beam 200, concrete is poured, so as to form an integral stressed structure.

The first steel bar framework 221 is connected with the second steel bar framework 231, and the first steel bar framework and the second steel bar framework can be detachably connected or fixedly connected. Illustratively, the first armature 221 may be lashed to the second armature 231 by rebar. Illustratively, the first steel framework 221 and the second steel framework 231 can be welded together. In addition, the first steel reinforcement framework 221 and the second steel reinforcement framework 231 can be integrally formed, so that the construction steps of a construction site are saved, and the construction is facilitated.

The concrete setting direction and position of first framework of steel reinforcement 221 and second framework of steel reinforcement 231 are not limited by this scheme, as long as can realize the restraint and the firm connection of first installation department 220 and second installation department 230. Referring to fig. 1, for example, the first steel reinforcement cage 221 may be disposed along a vertical direction, the second steel reinforcement cage 231 may be disposed along a horizontal direction, and the second steel reinforcement cage 231 may be disposed across the first steel reinforcement cage 221.

The concrete shapes of the first steel reinforcement framework 221 and the second steel reinforcement framework 231 are not limited by the scheme, and the function of the steel reinforcement frameworks in the cast-in-place concrete structure can be realized. For example, each of the first and second bobbins 221 and 231 may be constructed in a rectangular parallelepiped structure.

Illustratively, a plurality of vertical ribs 222 extend from one side of the first steel reinforcement framework 221, the vertical ribs 22 can extend into the ladder beam steel reinforcement framework 110 and be connected therewith, and after concrete is poured, the vertical ribs 222 are anchored into an integral structure, and besides the anchoring connection with the ladder beam 100, the vertical ribs 222 also bear pressure together with the concrete when in use. In order to fix the position of the second steel reinforcement frame 231 on the first steel reinforcement frame 221, so that the first steel reinforcement frame 221 and the second steel reinforcement frame 231 form a firm framework structure, the second steel reinforcement frame 231 may include a plurality of stirrups 232. Wherein, a plurality of stirrups 232 arrange in proper order along second framework 231's length direction, and first framework 221 is penetrated to one side of every stirrup 232 to through the ligature overlap joint, make second framework 231 be fixed in on the preset position of first framework 221, after concrete placement, first installation department 220, second installation department 230 and ladder beam 100 anchor are overall structure.

Wherein the vertical bars 222 refer to longitudinal bars and the stirrups 232 refer to transverse bars. The first and second armatures 221, 231 may include either the vertical ribs 222 or the stirrups 232. In addition, the specific shapes of the vertical rib 222 and the stirrup 232 are not limited in the present solution, as long as the functions of the first steel bar framework 221 and the second steel bar framework 231 in the present solution can be realized. Illustratively, the vertical ribs 222 may be in the shape of bars or hooks. Illustratively, the stirrup 232 may be rectangular or polygonal, and may or may not be closed.

Further, referring to fig. 1, the prefabricated staircase 300 is installed on the positioning installation surface 210 in a positioning manner with the reinforcing beam 200 in various manners, and for example, the positioning installation surface 210 may include a first positioning installation surface 211, the first positioning installation surface 211 is located between the first installation portion 220 and the prefabricated staircase 300, and the prefabricated staircase 300 is installed in a positioning manner with the reinforcing beam 200 through the first positioning installation surface 211. Illustratively, the positioning mounting surface 210 may further include a second positioning mounting surface 212, the second positioning mounting surface 212 is located between the second mounting portion 230 and the prefabricated staircase 300, and the prefabricated staircase 300 is positioned and mounted with the reinforcement beam 200 through the second positioning mounting surface 212.

Further, referring to fig. 1, 3 and 4, in order to ensure the accuracy and convenience of the positioning and installation between the reinforcement beam 200 and the prefabricated staircase 300, the reinforcement beam 200 further includes a plurality of positioning bars 240, and each of the positioning bars 240 has one end anchored to the reinforcement beam 200 and the other end protruding from the positioning installation surface 210. For example, the plurality of positioning bars 240 may include a plurality of first positioning bars 241, and the first positioning bars 241 may be anchored to the reinforcing beam 200 by the first mounting portions 220 and protrude from the first positioning mounting surface 211. Illustratively, the plurality of positioning bars 240 may further include a plurality of second positioning bars 242, and the second positioning bars 242 may be anchored to the reinforcing beam 200 by the second mounting portion 230 and protrude from the second positioning mounting surface 212.

Correspondingly, the prefabricated staircase 300 comprises a plurality of prefabricated holes 310 corresponding to the positioning steel bars 240 one by one, and the positioning steel bars 240 are positioned and installed with the prefabricated holes 310 on the prefabricated staircase 300. The specific arrangement direction and position of the prefabricated holes 310 are not limited in the scheme, and the prefabricated staircase 300 can be positioned and installed. For example, the prefabricated holes 310 may be disposed toward the first mounting portion 220 in a horizontal direction, and the first positioning steel bars 241 are positioned and mounted with the prefabricated holes 310 corresponding to one another. For example, the prefabricated holes 310 may be further disposed toward the second mounting portion 230 in a vertical direction, and a plurality of second positioning bars 242 are positioned and mounted with the corresponding prefabricated holes 310.

Further, there are various forms of the positioning installation of the positioning bars 240 and the prefabricated holes 310. Referring to fig. 3, for example, the prefabricated hole 310 is arranged along a vertical direction and is positioned and installed with the second positioning steel bar 242, a threaded section 2421 is arranged at one end of the second positioning steel bar 242 protruding out of the second positioning installation surface 212, and a nut 2422 matched with the threaded section 2421 is arranged on the threaded section 2421.

Correspondingly, the preformed hole 310 comprises a first connection hole 311 and a second connection hole 312 which are communicated with each other, the diameter of the first connection hole 311 is larger than that of the second connection hole 312, and a limiting surface 313 is formed at the joint of the first connection hole 311 and the second connection hole 312. When the positioning and installation are performed, the threaded section 2421 of the second positioning steel bar 242 sequentially passes through the second connecting hole 312 and the first connecting hole 311, and is bolted to the position of the limiting surface 313 together with the nut 2422. Thereafter, cement mortar or other grouting material is poured into the first connection hole 311 to block the prefabricated hole 310. Further, one or more, and for example, two, washers may be disposed between the nut 2422 and the limiting surface 313. Furthermore, reinforcing ribs 314 are embedded around each prefabricated hole 310 to resist stress concentration caused by the arrangement of the prefabricated holes 310, so that cracking of the prefabricated holes is avoided. The ribs 314 may be provided in various shapes, and an exemplary rib 314 may be provided in a "U" shape.

Further, referring to fig. 1, because the reinforcing beam has poor flatness, the prefabricated staircase 300 is directly installed on the reinforcing beam 200, which may affect the stability of the staircase, so that the leveling layer 250 is disposed on the second positioning and installing surface 212, and the prefabricated staircase 300 is installed on the leveling layer 250 during positioning and installation, so that the prefabricated staircase 300 is installed on a horizontal plane, thereby eliminating the problems of looseness, hollowing, sanding, cracking and the like, improving the installation stability of the prefabricated staircase 300, and realizing accurate positioning of the prefabricated staircase 300. It should be noted that the leveling layer 250 in this embodiment refers to a structural layer for leveling, slope finding or reinforcing, and may be laid by using cement mortar or cement concrete. Illustratively, the screed 250 may be a cement mortar layer of cement and mortar in a volume ratio of 1. The thickness of the leveling layer 250 ranges from 20 to 50mm, and the thickness of the leveling layer 250 may be 20mm, for example. The present embodiment does not limit the specific construction and materials of the screed 250, as long as the function thereof is achieved.

Furthermore, in order to improve the shock resistance and eliminate the deformation of the prefabricated staircase 300 and the reinforcement beam 200 caused by the climate temperature change, a gap is left between the prefabricated staircase 300 and the first installation part 220, a filling layer 260 is arranged in the gap, and the filling layer 260 is fully distributed in the whole gap. Wherein the thickness of the gap is in the range of 20-50mm, and the gap may be set to 30mm, for example. The filling layer 260 is made of a buffer material for shock resistance and deformation resistance, and illustratively, the filling layer 260 may be filled with polystyrene, and plugged with a PE rod on the top and sealed with a sealant. For example, the sealant can be a 30x30mm sealant strip.

Because the prefabricated staircase 300 and the ladder beam 100 have a height difference of 15-150mm, in order to realize smooth transition and good appearance between the prefabricated staircase 300 and the ladder beam 100, referring to fig. 1, a supplementary platform stage 270 is further provided at a side of the reinforcing beam 200 away from the prefabricated staircase 300. Illustratively, the reinforcement beam 200 is coupled to the ladder beam 100 at a first level 280, and the supplemental landing stage 270 extends from the first level 280 to a height within which the prefabricated staircase 300 is located. The height range refers to the allowable height difference between the supplementary landing stage 270 and the prefabricated staircase 300, and the specific value of the height difference is not limited by the scheme as long as the transition function between the prefabricated staircase 300 and the first horizontal plane 280 can be realized. The present embodiment does not limit the specific structure, size or material of the supplementary stage 270 as long as the function thereof can be achieved. Illustratively, the supplementary bench stage 270 may be a brick bench or a concrete cast-in-place bench.

Further, the present scheme also provides an installation method of the prefabricated staircase 300, which can apply the prefabricated staircase 300 to different floors, that is, the prefabricated staircase 300 can be installed on the ladder beam 100 with a height difference. Referring to fig. 5, fig. 5 is a flow chart showing steps of the installation method of the prefabricated staircase 300 according to the present invention, and the installation method of the prefabricated staircase 300 according to the present embodiment comprises the following steps:

step S1: a reinforcement beam 200 and a ladder beam 100 are obtained, the reinforcement beam 200 comprising a positioning mounting surface 210.

In the embodiment of the scheme, the reinforcing beam 200 and the stair beam 100 are obtained according to a construction scheme and an actual application scene, wherein the reinforcing beam 200 is provided with a positioning installation surface 210 so as to realize subsequent positioning installation of the prefabricated stair 300.

Step S2: at least a part of the structure of the reinforcing beam 200 is attached above the ladder beam 100 such that a height difference is maintained between the locating attachment surface 210 of the reinforcing beam 200 and the ladder beam 100.

In the embodiment of the present disclosure, at least a part of the structure of the reinforcing beam 200 is connected to the ladder beam 100, so that a height difference is maintained between the positioning and mounting surface 210 of the reinforcing beam 200 and the ladder beam 100, thereby ensuring that the prefabricated staircase 300 can be installed on a different floor having a height difference. Secondly, the stiffening beam 200 and the ladder beam 100 are connected to form an integral stressed structure, and the requirements of the prefabricated staircase 300 on the structural strength and rigidity of different floors are met. Wherein, the ladder beam 100 is directly connected with the difference floor, and the height of the ladder beam 100 is the height of the difference floor. In addition, the present solution does not limit the connection form and connection position of the ladder beam 100 and the different floors, as long as the function of the ladder beam 100 can be realized.

And step S3: and obtaining the prefabricated staircase 300.

In the embodiment of the present disclosure, the obtained prefabricated staircase 300 may be of a uniform size or a different size from the prefabricated staircase 300 installed on the standard floor. The specific shape, size and type of the prefabricated staircase 300 are not limited by the scheme, as long as the function of the prefabricated staircase 300 can be realized. Illustratively, the prefabricated staircase 300 may be a beam staircase or a plate staircase.

And step S4: the prefabricated staircase 300 is positioned and installed on the positioning installation surface 210 such that the reinforcing beam 200 is positioned between the prefabricated staircase 300 and the ladder beam 100.

In the embodiment of the present disclosure, the reinforcement beam 200 receives the prefabricated staircase 300 above the ladder beam 100, and the prefabricated staircase 300 is positioned and installed on the positioning installation surface 210 of the reinforcement beam 200, so as to ensure the function of the prefabricated staircase 300.

Further, in order to enable the reinforcement beam 200 to be adapted to the height difference between the prefabricated staircase 300 and the difference floor, and to achieve accurate positioning and installation of the prefabricated staircase 300, the step S1 of obtaining the reinforcement beam 200 and the ladder beam 100 according to the present embodiment, where the reinforcement beam 200 includes the positioning and installation surface 210, may include the following steps:

s11: and acquiring the standard floor height, the difference floor elevation and the height of the prefabricated staircase installation section 320.

S12: calculating the height of the first installation part 220 and the elevation of the second installation part 230 according to the standard floor height, the difference floor height and the height of the prefabricated staircase installation section 320; the first mounting portion 220 and the second mounting portion 230 are connected to form the reinforcing beam 200, and the elevation of the second mounting portion 230 is the height of the positioning mounting surface 210.

In the embodiment of the present embodiment, the specific installation position of the reinforcing beam 200, that is, the height of the first installation part 220 and the elevation of the second installation part 230, is determined according to the difference in height between the standard floor and the difference floor. The elevation in this embodiment is a structural elevation, that is, an installation or construction height of the building structure with respect to a starting point, which is a height of a main ground level of an indoor first floor of the building, as the starting point.

First, the reinforcing beam 200 may be configured in any possible structure as mentioned above, and for example, the reinforcing beam 200 is a cast-in-place concrete structure, the first installation part 220 is disposed along a vertical direction, the second installation part 230 may be disposed along a horizontal direction, the second installation part 230 is transversely disposed in the middle of the first installation part 220, two ends of the first installation part 220 protrude from the second installation part 230, and one end of the second installation part 230, which is close to the prefabricated staircase 300, protrudes from the first installation part 220.

In this embodiment, the prefabricated staircase 300 is installed on a different floor, and the standard floor height, the different floor elevation, and the height of the prefabricated staircase installation section 320 are obtained.

The height of the first installation part 220 = | difference floor height-standard floor height | -building floor thickness.

The elevation of the first mounting portion 220 = the height of the first mounting portion 220 + the difference floor elevation.

The elevation of the second installation part 230 = the elevation of the first installation part 220 + the thickness of the building deck-the height of the prefabricated staircase installation section 320-the preset thickness of the leveling layer 250.

The building surface layer is a decorative layer laid on a basic structure of a building, the thickness of the building surface layer depends on application scenes and functions of the building surface layer, the scheme is applied to a staircase, and the thickness of the building surface layer can be 30mm. The leveling layer 250 refers to a construction layer for leveling, slope finding or reinforcing, and the thickness of the leveling layer 250 may be 20-50mm. The preset thickness of the leveling layer 250 in the present embodiment refers to the thickness of the preset leveling layer 250, which is calculated for convenience, and the preset thickness of the leveling layer 250 in the present embodiment is 20mm.

Illustratively, the obtained standard floor level is 2700mm, the difference floor level is 3000mm, the difference floor elevation is 10000mm, and the height of the prefabricated staircase installation section 320 is 30mm. At this time, according to the above calculation formula, it can be calculated that: the height of the first mounting portion 220 is 270mm, the elevation of the first mounting portion is 10270mm, and the elevation of the second mounting portion is 10250mm.

The structure of the reinforcing beam 200 provided by the scheme has other forms, the calculation formulas of the height of the first installation part 220 and the elevation of the second installation part 230 are correspondingly changed, the scheme does not limit the specific calculation formulas of the height of the first installation part 220 and the elevation of the second installation part 230, and the reinforcing beam 200 can be used for accurately positioning and installing the prefabricated staircase 300.

Further, in order to connect the reinforcing beam 200 and the ladder beam 100 into a unitary structure, satisfy the structural strength and rigidity required for installing the prefabricated staircase 300, and ensure the stability of the installation of the prefabricated staircase 300, the step S2 of connecting at least a part of the structure of the reinforcing beam 200 above the ladder beam 100 to maintain the height difference between the positioning and mounting surface 210 of the reinforcing beam 200 and the ladder beam 100 may include the steps of:

s21: a first framework 221 of a height equal to the first installation portion 220 is obtained.

S22: a second rebar skeleton 231 is obtained.

S23: and binding and overlapping the first steel reinforcement framework 221 and the second steel reinforcement framework 231 above the steel reinforcement framework 110 of the ladder beam. Wherein, along the vertical direction, the first steel-bar framework 221 is installed on the second steel-bar framework 231 in a protruding manner. The second steel-reinforcement frame 231 is protrudingly installed at the first steel-reinforcement frame 221 in the horizontal direction. The elevation of the second steel bar framework 231 is the elevation of the second installation part 230.

S24: the first steel reinforcement framework 221, the second steel reinforcement framework 231 and the steel reinforcement framework 110 of the ladder beam are concreted, the first steel reinforcement framework 221 is concreted to obtain the first installation part 220, and the second steel reinforcement framework 231 is concreted to obtain the second installation part 230.

In the embodiment of this embodiment, a first steel reinforcement framework 221 is disposed in the first installation portion 220, and a second steel reinforcement framework 231 is disposed in the second installation portion 230, wherein the steel reinforcement of the first steel reinforcement framework 221 and the steel reinforcement of the second steel reinforcement framework 231 can be obtained by calculation through stress analysis. Through the mode of concreting behind the first framework of steel reinforcement 221, second framework of steel reinforcement 231 and the 110 ligature overlap joint of ladder beam framework of steel reinforcement for first installation department 220, second installation department 230 and the firm connection of ladder beam 100.

Further, the step S4 of positioning and mounting the prefabricated staircase 300 on the positioning and mounting surface 210 so that the reinforcing beam 200 is located between the prefabricated staircase 300 and the ladder beam 100 according to the present embodiment may further include the steps of:

s41: filling the gap between the prefabricated staircase 300 and the positioning installation surface 210.

The step includes filling the gap reserved between the first positioning installation surface 211 and the prefabricated staircase 300, and filling the part between the second positioning installation surface 212 and the prefabricated staircase 300, which is not filled by the leveling layer 250.

Further, the gap reserved between the first positioning installation surface 211 and the prefabricated staircase 300 can be filled with polyphenyl, a PE rod is plugged into the top of the gap, and the gap is sealed by sealant.

Further, the filling of the part between the second positioning installation surface 212 and the prefabricated staircase 300 which is not filled with the leveling layer 250 can be performed by filling and blocking with polyphenyl.

Further, in order to achieve smooth transition between the prefabricated staircase 300 and the staircase beam 100 and aesthetic property, the installation method of the prefabricated staircase of the present embodiment may further include the step S5: a complementary stage 270 is made. Wherein the supplementary landing stage 270 extends from the height of the difference floor level to within the height range of the prefabricated staircase 300. The supplementary stage 270 may be a brick step or a concrete cast-in-place method.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims (10)

1. A prefabricated staircase structure, comprising:

the prefabricated staircase is positioned above the ladder beam;

the reinforcing beam is positioned between the prefabricated staircase and the ladder beam;

the reinforcement beam comprises a positioning mounting surface, and the prefabricated staircase is positioned and mounted on the positioning mounting surface and the reinforcement beam; a height difference is arranged between the positioning installation surface and the ladder beam;

at least part of the structure of the reinforcing beam is used for connecting with the ladder beam.

2. The precast stair structure of claim 1, wherein the reinforcement beam comprises a first mounting portion and a second mounting portion, the first mounting portion being in anchored connection with the second mounting portion; the first mounting part is connected with the ladder beam in an anchoring way; or the second mounting part is connected with the ladder beam in an anchoring mode.

3. The prefabricated staircase structure of claim 2, wherein the first mounting portion includes a first rebar skeleton and the second mounting portion includes a second rebar skeleton;

the first steel bar framework protrudes out of the second steel bar framework along the vertical direction;

along the horizontal direction, second framework of steel reinforcement protrusion in first framework of steel reinforcement sets up.

4. The prefabricated staircase structure of claim 3, wherein the positioning installation surface comprises a first positioning installation surface, the first positioning installation surface is arranged between the first installation portion and the prefabricated staircase, the first positioning installation surface is provided with a plurality of first positioning steel bars in a protruding mode, and the first positioning steel bars are arranged in a positioning mode with the prefabricated holes in the prefabricated staircase.

5. The prefabricated staircase structure of claim 3 or 4, wherein the positioning installation surface comprises a second positioning installation surface, the second positioning installation surface is positioned between the second installation part and the prefabricated staircase, a leveling layer is arranged on the second positioning installation surface, and the prefabricated staircase is installed on the leveling layer so that the prefabricated staircase is installed on a horizontal plane.

6. The prefabricated staircase structure of claim 5, wherein a gap is left between the prefabricated staircase and the first installation part, and a filling layer is arranged in the gap.

7. The prefabricated staircase structure of claim 5, wherein the second positioning installation surface is provided with a plurality of second positioning steel bars in a protruding manner, and the plurality of second positioning steel bars are installed in a positioning manner with the plurality of prefabricated holes on the prefabricated staircase.

8. A method for installing a prefabricated staircase is characterized by comprising the following steps:

obtaining a reinforcing beam and a ladder beam, wherein the reinforcing beam comprises a positioning installation surface;

connecting at least part of the structure of the reinforcing beam above the ladder beam so as to maintain a height difference between the positioning installation surface of the reinforcing beam and the ladder beam;

acquiring a prefabricated staircase;

and positioning and mounting the prefabricated staircase on the positioning mounting surface so that the reinforcing beam is positioned between the prefabricated staircase and the ladder beam.

9. The method of installing a pre-fabricated staircase according to claim 8, wherein the step of obtaining a reinforcement beam and a ladder beam, the reinforcement beam comprising a positioning mounting surface comprises:

acquiring the standard floor height, the difference floor elevation and the height of a prefabricated staircase installation section;

calculating the height of the first installation part and the elevation of the second installation part according to the standard floor height, the difference floor height and the prefabricated staircase installation section height; the first installation part and the second installation part are connected to form the reinforcing beam, and the elevation of the second installation part is the height of the positioning installation surface.

10. The method of installing a pre-fabricated staircase as defined in claim 9, wherein said step of attaching at least part of the structure of the reinforcing beam above the ladder beam to maintain a height difference between the locating mounting surface of the reinforcing beam and the ladder beam comprises:

acquiring a first steel reinforcement framework with the same height as the first installation part;

acquiring a second steel bar framework;

binding and lapping the first steel bar framework and the second steel bar framework above the steel bar framework of the ladder beam; wherein the first steel bar framework is convexly arranged on the second steel bar framework along the vertical direction; the second steel bar framework is installed on the first steel bar framework in a protruding mode along the horizontal direction, and the elevation of the second steel bar framework is the elevation of the second installation portion;

and carrying out concrete pouring on the first steel reinforcement framework, the second steel reinforcement framework and the steel reinforcement framework of the ladder beam, wherein the first installation part is obtained after the first steel reinforcement framework is poured, and the second installation part is obtained after the second steel reinforcement framework is subjected to concrete pouring.

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