CN117188597A - Steel frame internal arch structure and flexible back-pull relay hoisting construction method thereof - Google Patents

Abstract

The utility model provides a steel frame inside arch structure and flexible back of body pull force hoist and mount construction method thereof, the structure includes main building steel frame and inside steel structure, inside steel structure and vertical edge steel frame pass through floor horizontal beam structure fixed connection, vertical edge steel frame includes side frame and back frame, the scope that two rows of frame posts in side frame are the arch region, the scope that lies between arch region and the back frame is non-arch region, inside steel structure includes arch structure and arch region suspension structure, the arch structure includes arch steel spare and even roof beam, even roof beam is located between two pin arch steel spare, arch region suspension structure includes the davit, the vertical general length of davit sets up between arch region floor roof beam, be the pin joint between davit and the arch steel spare. The arched steel member passes through the floor horizontal beam structure, so that the stress of the whole steel structure is changed, and the stress conversion of the arched steel member in the frame structure is completed. By adopting the arch structure flexible back-pulling technology, the installation of the arch steel piece and the arch lower hanging structure thereof is safely and accurately carried out.

Description

Steel frame internal arch structure and flexible back-pull relay hoisting construction method thereof

Technical Field

The invention belongs to the field of steel structure buildings, in particular to an internal arch structure of a steel structure and a construction method thereof.

Background

With the increasing complexity of architectural modeling, a corresponding increasing number of steel structural designs employ arched members to meet the needs of a variety of architectural appearances. The existing arch-shaped member is generally a main framework of a roof structure, structural supports are arranged at two ends of the arch-shaped member during design, the structural supports are generally columns or walls, and integral hoisting or block hoisting is performed outside during construction. When the arch structure is designed to be in an internal shape, how to arrange the arch structure and the frame structure for coordinated construction needs to be considered, and the existing construction method cannot be used. When the construction site is smaller, particularly when the arched member is constructed and installed, the vertical temporary support is usually required to be arranged on the ground below the arched member or on the structure by matching with a crane, the vertical temporary support is dismounted after the arched member is connected with other structures, the material cost of the measure of the vertical temporary support is extremely high, meanwhile, the occupied area is larger, a large amount of machinery and personnel are required in the installation and removal process, and the installation and removal danger exists in the construction process.

Particularly, when the site construction condition does not allow the vertical temporary support to be erected, the crane is only used for adjusting the inclination angle of the arched component in construction and installation, and meanwhile, the arched component is difficult to position in butt joint with other components and needs to be mechanically lifted for multiple times.

Disclosure of Invention

The invention aims to provide an arch structure inside a steel frame and a flexible back pull force hoisting construction method thereof, which aim to solve the problem that the arch structure is stressed when being designed inside the steel frame, solve the problem that the angle adjustment of a single support point is very difficult to vertically and temporarily support when the arch structure is installed in a butt joint mode, solve the problem that the positioning is difficult when other members are in butt joint, and solve the technical problems that a large amount of machines, personnel and cost are consumed in the construction, installation and detachment process and the construction, installation and detachment risks are high.

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

the steel frame internal arch structure comprises a main building steel frame and an internal steel structure, wherein the front side center of the main building frame is inwards concave to form a C-shaped space, the edge structure of the three main building steel frames of the C-shaped space comprises three surrounding vertical edge steel frames, the internal steel structure is arranged in the C-shaped space and is fixedly connected with the vertical edge steel frames through a floor horizontal beam structure,

The vertical edge steel frame comprises side frames which are arranged oppositely at the left side and the right side of the internal steel structure and a back frame which is arranged at the back side of the internal steel structure, wherein the edge steel frames at each side respectively comprise frame columns and frame beams which are fixedly connected between the frame columns and are arranged in a layered mode, the frame columns stand on the ground, the range of the front two rows of frame columns of the side frames is an arch area main column, the two rows of frame columns are arch area main columns, the frame beams between the arch area main columns of the same side frames are arch area main beams, the range between the arch area and the back frame is a non-arch area main column, the frame beams between the non-arch area main columns are non-arch area main beams, the frame beams between the arch area main columns of the back row and the non-arch area main columns are interval main beams,

the floor horizontal beam structures are arranged at intervals in layers along the height direction of the frame columns and correspond to the positions of the frame beams, and each layer comprises an arch area floor beam and a non-arch area floor beam;

the arch area floor girders comprise arch area floor girders and arch area floor secondary girders, two ends of the arch area floor girders are respectively and fixedly connected between corresponding arch area main columns in the frames on the left side and the right side which are oppositely arranged, the arch area floor secondary girders are vertically arranged between two arch area floor girders on the same layer at intervals, and two ends of the arch area floor secondary girders are respectively and fixedly connected between the arch area floor girders on the same layer;

The non-arch area floor beams comprise non-arch area floor secondary beams, the non-arch area floor secondary beams are vertical to arch area floor main beams, and two ends of the non-arch area floor secondary beams are respectively and fixedly connected between arch area floor main beams and non-arch area main beams of the rear row;

the inner steel structure includes an arch structure and an arch region suspension structure,

the arch structure comprises two arch steel pieces and connecting beams which are arranged in parallel front and back, the arrangement distance between the two arch steel pieces is equal to the distance between arch area main columns, each arch steel piece corresponds to the corresponding arch area main column and is located in the same vertical plane, the vertical plane is an arch face, each floor horizontal beam structure of each arch steel piece in each arch face is penetrated, the positions of steel members penetrated by the arch steel pieces are truncated and are fixedly connected with the arch steel pieces, the two ends of the arch steel pieces extend out of the side frames, the extending positions are the top ends of support sections of the arch steel pieces, and the bottom ends of the support sections obliquely stand on the ground;

the connecting beams are positioned between the two arched steel pieces, the two arched steel pieces are fixedly connected into a whole by pulling and connecting, the connecting beams are arranged at intervals along the radian of the arched steel pieces, the arrangement positions of the connecting beams correspond to the positions of the floor beams in each arch area, the connecting beams are added arch area floor secondary beams, the rear ends of the connecting beams extend backwards and are fixedly connected to the back frame, the connection positions are positioned on the main beams in the non-arch areas and/or the beam-column connection nodes of the main beams in the non-arch areas and the main columns in the non-arch areas, and the extended parts are added non-arch area floor secondary beams;

The arch area suspension structure comprises suspension columns, the suspension columns are vertically and generally arranged between the bottom arch area floor beams and the top arch area floor beams, the suspension columns are positioned in arch surfaces and are symmetrically arranged at intervals towards two sides by taking the top points of arch steel pieces as boundaries, the suspension columns are fixedly connected to the connection node positions of the arch area floor secondary beams and the arch area floor main beams in each layer of floor horizontal beam structure in a penetrating manner in each arch surface, each suspension column comprises an arch lower suspension column positioned at the lower side of the arch steel piece and an arch upper suspension column positioned at the upper side of the arch steel piece by taking the arch steel piece as a boundary, and the suspension columns and the arch steel pieces are in pin joint.

Eight-shaped reinforced diagonal braces are arranged between the arch area main beams; the arch area floor beams also comprise cross reinforced diagonal braces which are arranged in groups, and every three arch area floor secondary beams are arranged into a group as a unit.

The non-arch area floor beam is downwards provided with one layer of non-arch area floor beam forming a first layer compared with the arch area floor beam, and comprises two rows of non-arch area floor beams of the first layer, wherein the front row of non-arch area floor beams are arranged right below the two layers of arch area floor beams, the rear row of non-arch area floor beams are arranged right below the two layers of non-arch area floor beams, and non-arch area floor secondary beams are also arranged between the front row of non-arch area floor beams and the rear row of non-arch area floor beams;

The arch steel part is divided into a front arch and a rear arch, the suspension columns of the rear arch extend downwards to form a section bottom section, and two ends of the section bottom section are respectively and fixedly connected between the two-layer arch area floor main beams and the front non-arch area floor main beams;

the set elevation position of the arch area floor beam of the two layers is positioned at the top end of the support section.

A flexible back pull relay hoisting construction method for an arch structure in a steel frame comprises the following construction steps:

firstly, constructing a main building steel frame, wherein the main building steel frame comprises three vertical edge steel frames, pouring of each layer of floor slab concrete is finished simultaneously, the design strength is achieved, the installation condition of a steel structure in a C-shaped space is met, and the integral construction of a support section and an arch area main column is finished;

step two, hoisting a first automobile crane at the front side position of the C-shaped space, and arranging a safety upright rod or an anti-falling device or a ladder stand on the upper surface of a first arch section of a rear arch before hoisting; the temporary fixing splicing is carried out between the first arch segment and the support segment through the temporary splicing device of the arch segment with the temporary fixing structure, then the installation position of the first arch segment and the support segment is adjusted through the arch segment adjusting device with the temporary fixing structure, after the condition of unhooking of the crane is provided,

Welding a first temporary rigid diagonal rod between the first arch segment and the arch region main column to restrict welding deformation in the arch steel surface;

fourth, repeating the second to third steps to install the first arch segment of the front row arch;

step five, adopting a tower crane close to the installation side to install a connecting beam, and welding main welding seams of a first arch section and a support section in a rear arch and a front arch after the installation is completed;

step six, repeating the step two to the step five, and installing the first arch segments on the opposite sides according to the same method;

step seven, adopting a second automobile crane, repeating the steps two to six, installing a second arch segment on the first arch segment, welding a second temporary rigid diagonal rod between the second arch segment and the arch region main column, dismantling a steel wire rope of an arch segment adjusting device on the first arch segment after welding, reserving the first temporary rigid diagonal rod, and hanging a horizontal net below a floor beam of the first arch region to prevent high altitude falling;

step eight, adopting a third automobile crane, repeating the steps two to six, installing a third arch segment on the second arch segment, and adjusting the pre-lifting height of the arch segment to be the same when in place according to the simulated and calculated arch segment deformation height, so as to ensure that the welded arch segment meets the design precision; welding a third temporary rigid diagonal rod between a third arch segment and the main column of the arch area, wherein the segment of arch is required to be welded to finish at least one length of a main welding line before the hook of the automobile crane is detached, continuing to be welded after the hook is detached, dismantling a steel wire rope of an arch segment adjusting device on the second arch segment after the welding is finished, and reserving the third temporary rigid diagonal rod;

Step nine, installing the closure sections of the arch sections, measuring the actual size of the closure sections in advance, checking the size of the member, sequentially welding the two arch sections of the front row and the rear row, and checking and accepting the arch sections after all welding work is completed;

step ten, after the arch segment is accepted, removing the steel wire rope of the arch segment adjusting device on the third arch segment and the first, second and third temporary rigid diagonal rods, performing deformation monitoring in the removing process, comparing deformation data with construction simulation data, and performing next procedure installation to meet the design requirement; according to calculation, after the temporary rigid diagonal rods are removed, the deformation of the main arch is smaller than that of the qualified main arch;

eleventh, a fourth automobile crane is adopted, a lifting column of a rear row arch is installed, and a lifting cage or a climbing vehicle is adopted as an operation platform; according to construction simulation, firstly installing an under-arch hanging column in a rear arch surface, and then installing an under-arch hanging column in a front arch surface, wherein the influence on arch deformation is smaller than that of the under-arch hanging column;

step twelve, adopting a fourth automobile crane to mount the arch area floor girder of the rear arch two layers from two sections to the middle section, and carrying out integral correction after the mounting is finished, and welding from the middle section to two ends;

thirteenth, a fourth automobile crane is adopted to install the interval bottom section of the rear row arch;

fourteen, a fourth automobile crane is adopted to install a floor girder in a non-arch area below the rear row arch; after the installation is completed, the whole correction is carried out, and welding is carried out from the middle section to the two ends;

Fifteen, adopting a fourth automobile crane to sequentially install arch area floor girders between arch lower hanging columns in a rear arch surface from bottom to top;

sixthly, installing a floor girder in an arch area between the under-arch hanging columns of the front arch and the under-arch hanging columns by adopting an installation method which is the same as that of the rear arch;

seventeenth, adopting a tower crane to install a non-arch area floor secondary beam of the first layer;

eighteenth, adopting a tower crane or an automobile crane to install all other two layers of arch area floor beams and non-arch area floor beams;

nineteenth, repeating eighteen steps, and adopting a tower crane or an automobile crane to install all the other three-layer, four-layer arch area floor beams and non-arch area floor beams;

twenty, adopting a tower crane or an automobile crane to install all the other five layers of arch area floor beams, non-arch area floor beams and arch hanging columns;

step twenty-one, adopting a tower crane or an automobile crane to install all six-layer arch area floor beams and non-arch area floor beams, and completing the installation of an internal steel structure;

and twenty-two steps, paving a floor support plate on the floor beam from the first layer upwards, pouring floor slab concrete, and completing building construction in the C-shaped space.

In the second step, the temporary splicing device of the arch segments is arranged on the arch segments, the arch segments comprise support segments and first arch segments, the support segments comprise positioning plates, splicing ear plates, fixing clamping plates and fixing bolts, the splicing positions are defined as the lower side and the upper side based on the height of elevation,

The positioning plates are diagonally and symmetrically arranged at the upper side and the lower side of the splicing position, and comprise a lower positioning plate arranged at the lower side of the side surface of the top end part of the support section and an upper positioning plate arranged at the upper side of the side surface of the bottom end part of the first arch section, one half part of the positioning plate is fixedly connected with the arch section, the other half part extends out of the arch section and stretches into the splicing position, the bottom end part of the first arch section is respectively clamped and limited at the upper end part and the lower side of the splicing position by the positioning plate to limit the top end part on the support section, the bottom surface of the first arch section is butted with the top surface of the support section, the positioning plate forms a vertical limiting part,

the splicing ear plates comprise lower-section splicing ear plates which are arranged on the upper side and the lower side of the side surface of the top end part of the support section and upper-section splicing ear plates which are arranged on the upper side and the lower side of the side surface of the bottom end part of the first arch section, the lower-section splicing ear plates and the upper-section splicing ear plates are correspondingly arranged in pairs at splicing positions and are positioned in the same vertical plane, splicing ear plate holes are formed in the splicing ear plates,

the fixed splint cooperate every pair of concatenation otic placode, press from both sides to establish in every pair of concatenation otic placode's both sides, and upper segment concatenation otic placode is established to the top clamp of fixed splint, and lower segment concatenation otic placode is established to the bottom clamp of fixed splint, and the last fixed splint hole that corresponds of fixed splint has fixed splint hole, and fixed splint hole and concatenation otic placode hole pass through fixing bolt anchor.

The workman stands on the main body structure floor beam of main body building steel frame that has been under construction and adjusts the installation angle and the gesture of first section of encircleing through hunch section adjusting device, encircles the structure lug of district principal post and the regulation lug of first section of encircleing and all is located the main body structure floor beam position's of main body building steel frame top, encircle section adjusting device and include chain block, main steel wire rope, regulation wire rope and safety rope, the one end and the structure lug pull joint of main steel wire rope, the chain block is connected to the other end of main steel wire rope that hangs, the one end and the regulation lug pull joint of regulation wire rope, the chain block is located the top of main body structure floor beam and passes through the workman and pulls the regulation, the one end and the main steel wire rope fixed connection of safety rope, the other end and regulation lug fixed connection.

The first arch section is provided with two layers of connecting brackets connected with the floor beams in the arch area, the upper brackets and the lower brackets respectively correspond to the floor beams with the two layers of main structures respectively,

the arch segment temporary splicing device is positioned below the main body structure floor beam corresponding to the lower bracket;

the arch segment adjusting device is located above the main body structure floor beam corresponding to the upper bracket.

The lower side locating plate is symmetrically arranged on the support section by a column shaft of the arched steel piece, the lower half part of the lower side locating plate is fixedly connected on the support section, the upper half part of the lower side locating plate extends out of the splicing position,

two upper positioning plates are symmetrically arranged on the first arch section to be installed in a column axis symmetry manner by using arch sections, the upper half parts of the upper positioning plates are fixedly connected to the first arch section to be installed, and the lower half parts of the upper positioning plates extend out of the splicing position;

the splicing ear plates are symmetrically arranged on the left and right sides of the arch section column shaft and are positioned on the outer sides of the positioning plates, two splicing ear plates are arranged on each side of the upper section splicing ear plate, and two splicing ear plates are arranged on each side of the lower section splicing ear plate;

the bottom of the upper segment splicing ear plate is higher than the bottom end face of the first arch segment, the top of the lower segment splicing ear plate is lower than the top end face of the support segment, and the splicing ear plate holes are vertically arranged at intervals on the upper segment splicing ear plate or the lower segment splicing ear plate;

the fixing clamp plate comprises an inner plate arranged on the inner side of the spliced ear plate and an outer plate arranged on the outer side of the spliced ear plate, wherein the inner plate is connected with the spliced ear plate in advance, and the inner plate forms a left limiting piece and a right limiting piece;

the plate width of the fixed clamping plate is smaller than that of the spliced lug plate, and the outer edges of the fixed clamping plate and the spliced lug plate are flush.

The steps are divided into the following steps:

step a, fixedly connecting a lower segment splicing ear plate and a lower side positioning plate on a preset position of a support segment in advance; fixedly connecting an upper segment splicing ear plate and an upper side positioning plate on a preset position of a first arch segment in advance; the inner plate is temporarily connected with the upper-section splicing ear plate in advance through a fixing bolt;

step b, hoisting the first arch segment to a connecting position, and then connecting the arch segment adjusting device with the first arch segment in advance;

c, a worker steps on a floor beam of a main body structure to operate an arch segment adjusting device, a crane gradually lifts a to-be-first arch segment to a preset position, and then a temporary arch splicing device is spliced and aligned in place, wherein an inner plate serves as a horizontal limiting piece to limit the horizontal position of the first arch segment, positioning plates serve as vertical limiting pieces on the upper side and the lower side respectively to limit the vertical position of the first arch segment, and the positioning plates are aligned in place at one time, and in the process, the worker assists the installation posture and the angle of the arch by operating the arch segment adjusting device;

step d, after the adjustment is finished, a worker climbs in place by adopting a climbing ladder arranged on the back side of the arch section, the outer plates of the fixed clamping plates are spliced in place, and then all the fixed bolts are screwed and fixed;

And e, connecting a first temporary rigid diagonal rod between the first arch segment and the arch region main column, and then disassembling the arch segment adjusting device.

Compared with the prior art, the invention has the following characteristics and beneficial effects:

the arch structure of the invention comprises arch steel pieces, hanging columns and a floor horizontal beam structure. The arch steel piece passes through the horizontal beam structure of the building, the stress of the whole steel structure is changed, the building beams in the arch area in the arch surface of the arch steel piece become the arch pull beams of the arch steel piece, the other horizontal beam structures of the building are pull structures between the arch surfaces, and the horizontal beam structure of the building realizes two functions. The suspension columns are connected with the arched steel pieces in a pin joint mode, and the suspension columns are connected between the horizontal beam structures of the floors in a pulling mode, and stress conversion of the arched steel pieces in the frame structure is completed. Therefore, how to safely and accurately mount the arched steel piece and the under-arch hanging structure thereof is also the construction key point of the invention.

According to the construction method, an arch structure flexible back-pull force hoisting technology is adopted, according to structural characteristics and design requirements, after the concrete structure of the skirt building structure is capped and the floor slab reaches the design strength, the arch steel piece is installed, and a temporary support cannot be erected below the field arch steel piece, so that the arch structure flexible back-pull technology is adopted. The arch girder is hoisted every time, the arch section temporary splicing device is adopted between the upper surface of the arch girder and the steel column of the skirt building structure of the original building to splice the arch girder, the arch section temporary fixing measure is adopted, the arch section adjusting device is simultaneously pulled and arranged to adjust, the adjusted steel wire rope is reserved, the tension is pulled back by back layer according to the construction section, the installation efficiency is greatly improved, the follow-up accurate correction is convenient and quick, and the precision meets the requirements.

The invention aims to solve the problem of difficult butt joint positioning of arch-shaped members, adopts the temporary fixing device at the interface position of a section to be installed and a section already installed, carries out vertical clamping and limiting during installation by arranging the locating plates symmetrically connected at the upper side and the lower side, simultaneously forms a horizontal limiting part by pre-connecting the fixing clamp plate and the splicing ear plate, carries out horizontal limiting during installation, positions the section to be installed in one step, can quickly and accurately align the butt joint through the temporary fixing device at the interface, avoids time waste caused by repeated adjustment, and finally anchors the ear plate and the clamp plate into a whole through the fixing bolt, thereby realizing the purposes of quickly positioning the arch section, avoiding building high-altitude support, improving the construction efficiency and reducing the construction cost.

The invention aims to solve the problem that the angle adjustment of a single supporting point of a vertical temporary support is very difficult, and adopts the arrangement of the adjusting device at the top of the arch, wherein the adjusting device comprises a lifting lug, a steel wire rope and a chain block, so that the angle and the gesture can be adjusted in an auxiliary way when the arch is in place, and the arch can be hooked loosely when the design requirement is basically met, thereby avoiding the arrangement of a high-altitude support, reducing the construction cost and the operation risk, realizing the repeated use of the device and reducing the use cost of hoisting machinery.

Drawings

The novel form of the present invention will now be described in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic view of the position of the C-shaped space of the present invention.

Fig. 2 is a schematic view of the overall structure of the front side of the internal steel structure of the present invention.

Fig. 3 is a schematic side view of the structure of fig. 1.

Fig. 4 is a schematic view of the rear overall structure of the internal steel structure of the present invention.

Fig. 5 is a schematic view of the bottom structure of fig. 1.

Fig. 6 is a schematic structural view of an arch floor beam.

Fig. 7 is a schematic structural view of a non-arch floor beam.

Fig. 8 is a schematic structural view of a bridge.

Fig. 9 is a schematic view of an installation structure of an arch segment adjusting device exemplified by a first arch segment.

Fig. 10 is a schematic view of the installation structure of the temporary splicing device and the arch segment adjusting device taking the first arch segment as an example.

Fig. 11 is a schematic structural view of a suspension post.

Fig. 12 is a schematic view of the structure of three temporary rigid diagonal rods.

Fig. 13 is a schematic view of the construction of the first arch segment after installation.

Fig. 14 is a schematic view of the temporary bonding device of fig. 13.

Fig. 15 is a schematic view of the structure of the adjusting device in fig. 13.

Fig. 16 is a schematic view of the first arch segment installation process of fig. 13.

Fig. 17 is a schematic view of the temporary bonding device of fig. 16.

Fig. 18 is a schematic view of the structure in which the inner panels are connected in advance at the upper side split position.

Fig. 19 is a schematic view showing a structure in which the inner panels are previously attached at the lower side split position.

Fig. 20 is a schematic view of an outer plate mounting process of the fixing clip.

Fig. 21 is a schematic view of the structure of the fixing clip after installation.

Fig. 22 is a schematic view of the structure of the vertical edge steel frame of the present invention.

Fig. 23 is a schematic diagram of a three-step completion structure of the construction method.

Fig. 24 is a schematic diagram of a step four completion structure of the construction method.

Fig. 25 is a schematic diagram of a five-step completed structure of the construction method.

Fig. 26 is a schematic diagram of a construction completion structure in step six of the construction method.

Fig. 27 is a schematic view of a construction completion structure of step seven of the construction method.

Fig. 28 is a schematic view of a construction completion structure of step eight of the construction method.

Fig. 29 is a schematic view of a construction completion structure of step nine of the construction method.

Fig. 30 is a schematic diagram of a construction completion structure of step eleven of the construction method.

Fig. 31 is a schematic diagram of a construction completion structure of step twelve of the construction method.

Fig. 32 is a schematic diagram of a construction completion structure of step thirteen of the construction method.

Fig. 33 is a schematic view of a construction completion structure of step fourteen of the construction method.

Fig. 34 is a schematic view of a fifteen-construction-completed structure of the construction method.

Fig. 35 is a schematic view of a construction completion structure in step sixteen of the construction method.

Fig. 36 is a schematic view of a seventeen construction completion structure of the step of the construction method.

Fig. 37 is a schematic view of the construction completion structure of the step eighteen of the construction method.

Fig. 38 is a schematic diagram of a step nineteenth construction completion structure of the construction method.

Fig. 39 is a schematic diagram of a construction completion structure at step twenty of the construction method.

Fig. 40 is a schematic view of a twenty-first construction completion structure of the construction method.

Reference numerals: 1-side frames, 11-arch area main beams, 12-arch area main beams, 121-splayed reinforcement diagonal braces, 13-section main beams, 2-back frames, 21-non-arch area main beams, 22-non-arch area main beams, 3-arch area floor beams, 31-arch area floor beams, 311-upper brackets, 312-lower brackets, 32-arch area floor sub-beams, 33-cross reinforcement diagonal braces, 4-non-arch area floor beams, 41-non-arch area floor main beams, 42-non-arch area floor sub-beams, 5-arch structures, 5 a-front row arch, 5 b-rear row arch, 51-arch steel members, 511-support sections, 512-first arch sections, 513-second arch sections, 514-third arch sections, 515-closure sections, 52-tie beams, 6-arch section temporary splice devices, 61-locating plates, 611-lower side locating plates 612-upper side locating plate, 62-splicing ear plate, 621-lower section splicing ear plate, 622-upper section splicing ear plate, 623-splicing ear plate hole, 63-fixed clamping plate, 631-fixed clamping plate hole, 632-inner plate, 633-outer plate, 64-fixed bolt, 7-arch section adjusting device, 71-chain block, 72-main hanging wire rope, 73-adjusting wire rope, 74-safety rope, 8-structure lifting lug, 9-adjusting lifting lug, 10-lifting column, 101-arch lower lifting column, 102-arch upper lifting column, 103-interval bottom section, 14-first automobile crane, 15-first temporary rigid diagonal, 16-second automobile crane, 17-second temporary rigid diagonal, 18-third temporary rigid diagonal, 19-fourth automobile crane, 20-main structure floor beam, 21-C type space and 22-third automobile crane.

Detailed Description

Examples referring to fig. 1, in this example, a skirt house building has a span of 41.6mx 29.08m in the range of 2-6 floors, and is converted by an arch structure. The utility model provides an inside arch structure of steel frame, includes main part building steel frame and inside steel construction, the front side central authorities indent of main part building frame forms C type space 21, and the edge structure of the three side main part building steel frame in C type space 21 includes the vertical edge steel frame that three enclose, inside steel construction sets up in C type space 21 and passes through floor horizontal beam structure fixed connection with vertical edge steel frame.

Referring to fig. 2-5, the vertical edge steel frame comprises side frames 1 and a back frame 2, wherein the side frames 1 are oppositely arranged on the left side and the right side of the inner steel structure, the back frame 2 is arranged on the back side of the inner steel structure, each side of the edge steel frame comprises frame columns and frame beams which are fixedly connected between the frame columns and are arranged in a layered mode, the frame columns stand on the ground, the range of the front two rows of frame columns of the side frames 1 is an arch region main column 11, the frame beams between the arch region main columns 11 of the same side frames 1 are arch region main beams 12, the range between the arch region and the back frame 2 is a non-arch region main column 21, the frame beams between the non-arch region main columns 21 are non-arch region main beams 22, and the frame beams between the arch region main columns 11 of the back row and the non-arch region main columns 21 are section main beams 13.

The floor horizontal beam structures are arranged at intervals in layers along the height direction of the frame columns and corresponding to the positions of the frame beams, and each layer comprises an arch area floor beam 3 and a non-arch area floor beam 4. In this embodiment, six layers of arch area floor beams 3 and five layers of non-arch area floor beams 4 are provided.

Referring to fig. 6, the arch floor girder 3 includes an arch floor girder 31 and an arch floor secondary girder 32, two ends of the arch floor girder 31 are respectively and fixedly connected between corresponding arch main columns 11 in the left-right opposite side frames 1, the arch floor secondary girders 32 are vertically and alternately arranged between two arch floor girders 31 on the same floor, and two ends of the arch floor secondary girder 32 are respectively and fixedly connected between the arch floor girders 31 on the same floor.

Referring to fig. 7, the non-arch floor beam 4 includes a non-arch floor sub-beam 42, the non-arch floor sub-beam 42 is perpendicular to the arch floor main beam 31, and two ends of the non-arch floor sub-beam 42 are fixedly connected between the arch floor main beam 31 and the non-arch floor main beam 22 of the rear row, respectively.

The inner steel structure comprises an arch structure 5 and an arch region suspension structure:

referring to fig. 2-5, the arch structure 5 includes two arch steel members 51 and a connecting beam 52, which are arranged in parallel, a distance between the two arch steel members 51 is equal to a distance between the arch area main columns 11, each arch steel member 51 corresponds to the corresponding arch area main column 11 and is located in the same vertical plane, the vertical plane is an arch surface, the arch steel members 51 are penetrated in each floor horizontal beam structure in each arch surface, positions of steel members penetrated by the arch steel members 51 are truncated and are fixedly connected with the arch steel members 51, two ends of the arch steel members 51 extend out of the side frames 1, the extending positions are top ends of support sections 511 of the arch steel members 51, and bottom ends of the support sections 511 obliquely stand on the ground.

Referring to fig. 8, the connecting beams 52 are located between two arch steel members 51, and are pulled and connected to make the two arch steel members 51 fixedly connected together, the connecting beams 52 are arranged at intervals along the radian of the arch steel members 51, the arrangement positions of the connecting beams 52 correspond to the positions of the floor beams 3 in each layer of arch area, the connecting beams 52 are added arch area floor sub-beams 32, the rear ends of the connecting beams 52 extend backwards and are fixedly connected to the back frame 2, the connection positions are located on the main beams 22 in non-arch areas and/or on beam-column connection nodes of the main beams 22 in non-arch areas and the main columns 21 in non-arch areas, and the extending parts are added non-arch area floor sub-beams 42.

Referring to fig. 11, the arch area suspension structure includes suspension columns 10, wherein the suspension columns 10 are vertically and generally arranged between the bottom arch area floor beams 3 and the top arch area floor beams 3, the suspension columns 10 are positioned in arch planes and are symmetrically and alternately arranged on two sides by taking the top points of the arch steel members 51 as boundaries, the suspension columns 10 are fixedly connected to the connection node positions of the arch area floor secondary beams 32 and the arch area floor main beams 31 in each layer of horizontal beam structure in a penetrating manner in each arch plane, and each suspension column 10 comprises an arch lower suspension column 101 positioned on the lower side of the arch steel members 51 and an arch upper suspension column 102 positioned on the upper side of the arch steel members 51 by taking the arch steel members 51 as boundaries. The suspension post 10 and the arch steel 51 are all in pin joint.

Referring to fig. 6, splayed reinforcing diagonal braces 121 are arranged between the arch area main beams 12; the arch floor beams 3 further comprise cross reinforcement braces 33 arranged in groups, one group being arranged for each three arch floor sub-beams 32.

Referring to fig. 3, 5 and 7, the non-arch area floor beam 4 is provided with one more non-arch area floor beam 4 which forms a first layer downwards than the arch area floor beam 3, and comprises two rows of non-arch area floor beams 41 of the first layer, wherein the front row of non-arch area floor beams 41 is arranged right below the two layers of arch area floor beams 31, the rear row of non-arch area floor beams 41 is arranged right below the two layers of non-arch area floor beams 22, and non-arch area floor sub-beams 42 are also arranged between the front row of non-arch area floor beams 41 and the rear row of non-arch area floor beams 41.

The arch steel member 51 is divided into a front arch 5a and a rear arch 5b, the suspension posts 10 of the rear arch 5b extend downwards to form a section bottom section 103, and two ends of the section bottom section 103 are respectively and fixedly connected between the two-layer arch area floor main beam 31 and the front non-arch area floor main beam 41.

Referring to fig. 5, the set elevation position of the arch floor beam 3 of the two floors is located at the top end of the pedestal section 511.

The flexible back pull relay hoisting construction method for the arch structure in the steel frame comprises the following construction steps:

Before construction: because the beam section of the arched steel piece is large and 900mm multiplied by 800mm multiplied by 80mm, the arched steel piece is connected with floor beams, horizontal supports, under-arch hanging columns, on-arch hanging columns and the like, and the joints are complex. Therefore, the Tekla software is adopted to carry out deep design of the components, the performance of the on-site tower crane and the performance of the automobile crane are combined, the high-altitude operation is reasonably segmented, the performance of hoisting equipment is fully exerted, and the on-site construction efficiency is improved. And the midas software is adopted to simulate the construction process, and the components, the steel wire ropes, the clamping plates, the bolts and the like are all calculated, so that the safety of the construction process is ensured.

Step one, referring to fig. 1, the construction main body building steel frame comprises three vertical edge steel frames, casting of each layer of floor slab concrete is completed simultaneously, design strength is achieved, and the installation condition of a steel structure in a C-shaped space is met, wherein the support section 511 and the arch area main column 11 are integrally constructed.

Hoisting the front side of the C-shaped space by adopting a first automobile crane 14, and arranging a safety upright rod or a falling protector or a cat ladder on the upper surface of a first arch section 512 of the rear arch before hoisting; the temporary fixing and splicing are carried out between the first arch segment 512 and the support segment 511 through the temporary fixing structure arch segment temporary splicing device 6, then the installation positions of the first arch segment 512 and the support segment 511 are adjusted through the temporary fixing structure arch segment adjusting device 7, after the condition of unhooking a crane is achieved, unhooking is carried out, and a welding platform is adopted by an operation platform.

Step three, welding a first temporary rigid diagonal rod 15 between the first arch segment and the arch region main column 11 to constrain the in-plane welding deformation of the arched steel members 51, as shown in fig. 23.

Step four, the first arch segment of the front row arch is installed by repeating steps two to three, as shown in fig. 24.

And fifthly, installing the connecting beam 52 by adopting a tower crane close to the installation side, and installing and welding main welding seams of the first arch segment 512 and the support segment 511 in the rear arch 5a and the front arch 5b after the installation is finished by adopting an operation platform, wherein the operation platform is shown in fig. 25.

Step six, repeating steps two to five, installing the first arch segments on the opposite sides in the same way, as shown in fig. 26.

Step seven, adopting a second automobile crane 16, repeating the steps two to six, installing a second arch section 513 on the first arch section 512, welding a second temporary rigid diagonal rod 17 between the second arch section 513 and the arch region main column 11, dismantling a steel wire rope of an arch section adjusting device on the first arch section 512 after welding, reserving the first temporary rigid diagonal rod 15, and hanging a horizontal net below the floor beam 3 of the first arch region to prevent high altitude falling, wherein the method is shown in fig. 27.

Step eight, adopting a third automobile crane 18, repeating the steps two to six, installing a third arch segment 514 on the second arch segment 513, and adjusting the pre-lifting height of the arch segment to be the same when in place according to the simulated and calculated arch segment deformation height, so as to ensure that the welded arch segment meets the design precision; in this example 5mm.

And a third temporary rigid diagonal rod 18 is welded between the third arch segment 514 and the arch region main column 11, the segment of the arch needs to be welded to complete the main welding seam by at least 1/5 length before the automobile crane is unhooked, the welding is continued after unhooking, the steel wire rope of the arch segment adjusting device on the second arch segment 513 is removed after the welding is completed, and the third temporary rigid diagonal rod 18 is reserved, as shown in fig. 28.

Step nine, installing the folding sections 515 of the arch sections, measuring the actual size of the folding sections in advance, checking the size of the components, sequentially welding the two arch sections of the front row and the rear row, and checking and accepting the arch sections after all welding work is completed. When the size of the component is rechecked again, if the length of the component is overlength, a polishing machine can be adopted to polish and repair the component properly, so that the folded section can be installed smoothly, the welding can be performed after the arch posture and the positioning size are adjusted, the bottom flange of the arch section adopts an overhead welding seam, and the situation that the welding engineering amount is increased when a manhole is arranged is avoided, as shown in fig. 29.

And step ten, after the arch segments are accepted, removing the steel wire rope of the arch segment adjusting device on the third arch segment 514 and the first, second and third temporary rigid diagonal rods, wherein the specific positions are shown in fig. 12. Performing deformation monitoring in the dismantling process, comparing deformation data with construction simulation data, and performing next procedure installation while meeting design requirements; and according to calculation, after the temporary rigid diagonal rods are removed, the main arch deformation is smaller than 1mm and is qualified.

Eleventh, a fourth automobile crane 19 is adopted, a rear row arch suspension post 10 is installed, and a suspension cage or a climbing vehicle is adopted as an operation platform; according to construction simulation, two arch lower suspension columns are sequentially installed, the influence on arch deformation is smaller than 1mm, in order to facilitate construction, the arch lower suspension columns 101 in the arch surface of the rear row are installed first, and then the arch lower suspension columns 101 in the arch surface of the front row are installed, so that the influence on arch deformation is smaller than 1mm, and the arch deformation is realized, as shown in fig. 30.

Step twelve, mounting the arch area floor main beams 31 of the rear arch two layers from two sections to the middle section by adopting a fourth automobile crane 19, and integrally correcting after the mounting, and welding from the middle section to two ends, as shown in fig. 31.

In step thirteen, a fourth crane 19 is used to install the section bottom segment 103 of the rear row arch, as shown in fig. 32.

Fourteen, mounting a floor main beam 41 in a non-arch area below the rear row arch by adopting a fourth automobile crane 19; after the installation is completed, the whole is corrected, and welding is performed from the middle section to the two ends, as shown in fig. 33.

Fifteen, the fourth crane 19 is adopted to sequentially install the arch area floor girders 31 between the under-arch hanging columns in the rear arch surface from bottom to top, as shown in fig. 34.

Sixthly, the same mounting method as the rear arch is used to mount the floor girders 31 in the arch area between the front arch lower suspension columns 101 and the lower arch lower suspension columns, as shown in fig. 35.

Seventeenth, the tower crane is used to install the non-arch area floor secondary beam 42 of the first floor, as shown in fig. 36.

Eighteenth, using tower crane or car crane to install all other two layers of arch area floor beams 3 and non-arch area floor beams 4, see figure 37.

Step nineteenth, repeat step eighteen, install all other three, four layers of arch area floor beams 3 and non-arch area floor beams 4 with tower crane or truck crane, see figure 38.

Twenty, using a tower crane or an automobile crane, installing all the remaining five-layer arch area floor beams 3, non-arch area floor beams 4 and arch hanging columns 102, as shown in fig. 39.

Twenty-one, adopting a tower crane or an automobile crane to install all six-layer arch area floor beams 3 and non-arch area floor beams 4, and completing the installation of the internal steel structure, as shown in fig. 40.

And twenty-two steps, paving a floor support plate on the floor beam from the first layer upwards, pouring floor slab concrete, and completing building construction in the C-shaped space.

In the second step, referring to fig. 13-17, the temporary arch segment splicing device 6 is disposed on an arch segment, where the arch segment includes a support 511 and a first arch segment 512, and includes a positioning plate 61, a splicing ear 62, a fixing clamping plate 63, and a fixing bolt 65, and the splicing position is defined as a lower side and an upper side based on the height of the elevation. The first arch segment 512 is provided with two layers of connecting brackets for connecting the floor beams 3 in the arch area, and the upper brackets 311 and the lower brackets 312 respectively correspond to the two layers of floor beams 20 in the main body structure. The arch segment temporary splicing device 6 is positioned below the main body structure floor beam 20 corresponding to the lower bracket 312.

Referring to fig. 18-19, the positioning plate 61 is disposed diagonally and symmetrically on the upper and lower sides of the splicing position, and includes a lower positioning plate 611 disposed on the lower side of the top end side of the support section 511 and an upper positioning plate 612 disposed on the upper side of the bottom end side of the first arch section 512, where a half of the positioning plate 61 is fixedly connected with the arch section, and the other half extends out of the arch section and stretches into the splicing position, and the bottom end of the first arch section 512 is respectively clamped and limited on the top end of the support section 511 at the splicing position by the positioning plate 61, so that the bottom surface of the first arch section 512 is abutted with the top surface of the support section 511, and the positioning plate 61 forms a vertical limiting member.

In this embodiment, two lower positioning plates 611 are symmetrically disposed on the support section 511 about the column axis of the arched steel member 51, the lower half of the lower positioning plate 611 is fixedly connected to the support section 511, and the upper half of the lower positioning plate 611 extends out of the splicing position. The upper positioning plate 612 is provided with two upper positioning plates 612 on the first arch segment 512 in an axisymmetric manner, the upper half of the upper positioning plate 612 is fixedly connected to the first arch segment 512, and the lower half of the upper positioning plate 612 extends out of the splicing position.

The splicing ear plate 62 includes a lower-section splicing ear plate 621 disposed on the upper and lower sides of the top end side of the support section 511 and an upper-section splicing ear plate 622 disposed on the upper and lower sides of the bottom end side of the first arch section 512, the lower-section splicing ear plate 621 and the upper-section splicing ear plate 622 are disposed in pairs at the splicing positions and on the same vertical plane, and the splicing ear plate 62 is provided with a splicing ear plate hole 623.

In this embodiment, the splicing ear plates 62 are symmetrically arranged on the left and right sides of the arch section column axis and are located on the outer sides of the positioning plates, two splicing ear plates 622 are arranged on each side of the upper section splicing ear plate, and two splicing ear plates 621 are arranged on each side of the lower section splicing ear plate. The bottom of the upper segment splice lug 622 is higher than the bottom end surface of the first arch segment 512, the top of the lower segment splice lug 621 is lower than the top end surface of the support segment 511, and the splice lug holes 623 are vertically arranged at intervals on the upper segment splice lug 622 or the lower segment splice lug 621.

The fixed splint 63 cooperates every pair of concatenation otic placode 62, presss from both sides to establish in every pair of concatenation otic placode 62, and upper segment concatenation otic placode 622 is pressed from both sides at the top of fixed splint 63, and lower segment concatenation otic placode 621 is pressed from both sides to the bottom of fixed splint 63, and corresponding concatenation otic placode 623 on the fixed splint 63 opens has fixed splint hole 631, and fixed splint hole 631 passes through fixing bolt 64 anchor with concatenation otic placode 623.

The fixing clamp plate 63 comprises an inner plate 632 arranged on the inner side of the splicing ear plate 62 and an outer plate 633 arranged on the outer side of the splicing ear plate 62, the inner plate 632 is connected with the splicing ear plate 62 in advance, and the inner plate 632 forms a left limiting part and a right limiting part. The plate width of the fixing clamp plate 63 is smaller than that of the splicing ear plate 62, and the outer edges of the fixing clamp plate and the splicing ear plate are flush.

In this embodiment, the arch adjusting device 7 is located above the main structural floor beam 20 corresponding to the upper bracket 311. The workman stands on the main structure floor beam 20 and adjusts the installation angle and the gesture of first hunch section 512 through hunch post adjusting device 7, and the structure lug 8 of hunch post adjusting device 7, hunch district main column 11 and the regulation lug 9 of first hunch section 512 all are located the top of main structure floor beam 20 position, hunch post adjusting device 7 includes chain 71, main wire rope 72, adjusts wire rope 73 and safety rope 73, the one end and the structure lug 8 pull joint of main wire rope 72, the chain 71 is connected to the other end of main wire rope 72, the one end and the regulation lug 9 pull joint of wire rope 73, and chain 71 is connected to the other end of adjusting wire rope 73, and chain 71 is located the top of main structure floor beam 20 and passes through workman's pulling adjustment. One end of the safety rope 74 is fixedly connected with the main hoisting wire rope 72, and the other end is fixedly connected with the adjusting lifting lug 9.

The specification and model of the lifting lug, the steel wire rope, the chain block and the like related in the invention are all required to be determined through calculation. The temporary rigid diagonal rod is made of H200 section steel, the first truck crane 14 is 130 tons, the second truck crane 16 is 260 tons, the third truck crane 18 is 350 tons, and the fourth truck crane 19 is 50 tons.

After the temporary splicing device 6 and the adjusting device 7 of the arch segments are adopted, the steps are divided into the following steps for construction:

step a, referring to fig. 17 to 19, the lower splice ear plate 621 and the lower positioning plate 611 are fixedly attached in advance to a predetermined position of the support section 511; fixedly connecting the upper splice lug 622 and the upper positioning plate 612 to predetermined positions of the first arch segment 512 in advance; the inner panel 632 is then temporarily attached to the upper splice ear panel 622 by the fixing bolts 65 in advance.

Step b, the first arch segment 512 is lifted to the connection position, and then the arch segment adjusting device 7 is connected with the first arch segment 512 in advance.

Step c, a worker steps on the floor beam of the main structure to operate the arch segment adjusting device, the crane gradually lifts the first arch segment 512 to a preset position, and then the temporary arch splicing device is spliced and aligned in place, wherein the inner plate 632 serves as a horizontal limiting piece to limit the horizontal position of the first arch segment 512, the positioning plates serve as vertical limiting pieces to limit the vertical position of the first arch segment 512 on the upper side and the lower side respectively, and the positioning plates are aligned in place at one time, and in this process, the worker assists the installation posture and the angle of the arch by operating the arch segment adjusting device.

Step d, referring to fig. 20-21, after the adjustment, the worker climbs in place by using a ladder arranged on the back side of the arch section, splice the outer plate 633 of the fixing clamp 63 in place, and then screw and fix all the fixing bolts.

And e, connecting a first temporary rigid diagonal rod between the first arch segment 512 and the arch region main column 11, and then disassembling the arch segment adjusting device.

In the invention, in the step eleven, the step thirteenth and the step sixteenth, the section of the arch lower hanging column is 380mm multiplied by 24mm, the maximum length is 18.5m, and the arch lower hanging column and the arch member are connected by adopting a pin shaft. Because the arch structure beam has a large section, the hanging column is difficult to install, and the construction requirement is met by adopting a relay hoisting technology on site. Firstly, hanging and setting a suspension cage at the position of a suspension column installation node, so that the operation requirement of personnel is met, and the safety of the operators is ensured; lifting lug plates are arranged on four sides of a lifting column, two lifting lugs in the direction of an arched girder are adopted to enable lifting to be vertical and to be lifted below a position to be installed, two lifting lugs in the direction of a vertical arched girder are lifted on the arched girder in a manner of chain pouring and safety ropes, and after the chain pouring is tensioned, a lifting machine slowly loosens a hook until a sling is released after the lifting machine is not stressed; the position of the suspension post is accurately adjusted by adopting slow tensioning of a chain block, and a pin shaft is installed.

Claims (9)

1. An inside arch structure of steel frame, its characterized in that: comprises a main building steel frame and an internal steel structure, wherein the center of the front side of the main building frame is inwards concave to form a C-shaped space (21), the edge structure of the three main building steel frames of the C-shaped space (21) comprises a vertical edge steel frame surrounded by three sides, the internal steel structure is arranged in the C-shaped space (21) and is fixedly connected with the vertical edge steel frame through a floor horizontal beam structure,

The vertical edge steel frame comprises side frames (1) which are oppositely arranged at the left side and the right side of the inner steel structure and a back frame (2) which is arranged at the back side of the inner steel structure, wherein the edge steel frames at each side respectively comprise frame columns and frame beams which are fixedly connected between the frame columns and are arranged in a layered mode, the frame columns stand on the ground, the range of the front two rows of frame columns of the side frames (1) is an arch area, the two rows of frame columns are arch area main columns (11), the frame beams between the arch area main columns (11) of the same side frames (1) are arch area main beams (12), the range between the arch area and the back frame (2) is a non-arch area main column (21), the frame beams between the non-arch area main columns (21) are non-arch area main beams (22), the frame beams between the arch area main columns (11) of the back row and the non-arch area main columns (21) are section main beams (13),

the floor horizontal beam structures are arranged at intervals in layers along the height direction of the frame columns and correspond to the positions of the frame beams, and each layer comprises an arch area floor beam (3) and a non-arch area floor beam (4);

the arch area floor beams (3) comprise arch area floor main beams (31) and arch area floor secondary beams (32), two ends of the arch area floor main beams (31) are respectively and fixedly connected between corresponding arch area main columns (11) in the left-right opposite side frames (1), the arch area floor secondary beams (32) are vertically arranged between two arch area floor main beams (31) on the same layer at intervals, and two ends of the arch area floor secondary beams (32) are respectively and fixedly connected between the arch area floor main beams (31) on the same layer;

The non-arch area floor beams (4) comprise non-arch area floor sub-beams (42), the non-arch area floor sub-beams (42) are perpendicular to the arch area floor main beams (31), and two ends of the non-arch area floor sub-beams (42) are fixedly connected between the arch area floor main beams (31) and the non-arch area main beams (22) of the rear row respectively;

the inner steel structure comprises an arch structure (5) and an arch area suspension structure,

the arch structure (5) comprises two arch steel pieces (51) and connecting beams (52) which are arranged in parallel from front to back, the arrangement distance between the two arch steel pieces (51) is equal to the distance between arch area main columns (11), each arch steel piece (51) corresponds to the corresponding arch area main column (11) and is located in the same vertical plane, the vertical plane is an arch surface, the arch steel pieces (51) are penetrated in each floor horizontal beam structure in each arch surface, the positions of steel members penetrated by the arch steel pieces (51) are truncated and are fixedly connected with the arch steel pieces (51), the two ends of the arch steel pieces (51) extend out of the side frames (1), the extending positions are the top ends of support sections (511) of the arch steel pieces (51), and the bottom ends of the support sections (511) are obliquely erected on the ground;

the connecting beams (52) are positioned between the two arched steel pieces (51) and are connected with each other in a pulling way so that the two arched steel pieces (51) are fixedly connected into a whole, the connecting beams (52) are arranged at intervals along the radian of the arched steel pieces (51), the arrangement positions of the connecting beams (52) correspond to the positions of the floor beams (3) in each arch area, the connecting beams (52) are added arch area floor secondary beams (32), the rear ends of the connecting beams (52) extend backwards and are fixedly connected to the back frame (2), the connection positions are positioned on the main beams (22) in the non-arch areas and/or the beam-column connection nodes of the main beams (22) in the non-arch areas and the main columns (21), and the extended parts are added non-arch area floor secondary beams (42);

The arch area suspension structure comprises suspension columns (10), wherein the suspension columns (10) are vertically and generally arranged between a floor beam (3) in a bottom arch area and a floor beam (3) in a top arch area, the suspension columns (10) are positioned in arch planes and are symmetrically arranged at intervals from the top points of arch steel pieces (51) to two sides, the suspension columns (10) are fixedly connected to the connection node positions of a secondary beam (32) of the floor beam structure in each floor horizontal beam structure and a main beam (31) of the floor in the arch area in an inserting manner in each arch plane, each suspension column (10) comprises a suspension column (101) positioned at the lower side of the arch steel piece (51) and a suspension column (102) positioned at the upper side of the arch steel piece (51) by taking the arch steel piece (51) as the boundary, and the suspension columns (10) and the arch steel pieces (51) are in pin joint.

2. The steel frame internal arch as recited in claim 1, wherein: splayed reinforcing diagonal braces (121) are arranged between the arch area main beams (12); the arch area floor beams (3) further comprise cross reinforcement diagonal braces (33) which are arranged in groups, and every three arch area floor secondary beams (32) are arranged in groups for one unit.

3. The steel frame internal arch according to claim 1 or 2, wherein: the non-arch area floor beam (4) is downwards provided with one layer of non-arch area floor beam (4) forming a first layer more than the arch area floor beam (3), and comprises two rows of non-arch area floor beams (41) of the first layer, wherein the front row of non-arch area floor beams (41) are arranged right below the two layers of arch area floor beams (31), the rear row of non-arch area floor beams (41) are arranged right below the two layers of non-arch area floor beams (22), and non-arch area floor secondary beams (42) are also arranged between the front row of non-arch area floor beams (41) and the rear row of non-arch area floor beams (41);

The arch steel piece (51) is divided into a front arch (5 a) and a rear arch (5 b), the hanging columns (10) of the rear arch (5 b) extend downwards to form a section bottom section (103), and two ends of the section bottom section (103) are respectively and fixedly connected between a two-layer arch area floor main beam (31) and a front non-arch area floor main beam (41);

the set elevation position of the floor beam (3) in the arch area of the two floors is positioned at the top end of the support section (511).

4. A flexible back tension hoisting construction method of an arch structure inside a steel frame according to claim 3, characterized in that the construction steps are as follows:

firstly, constructing a main building steel frame, wherein the main building steel frame comprises three vertical edge steel frames, pouring of each layer of floor slab concrete is finished simultaneously, the design strength is achieved, the installation condition of a steel structure in a C-shaped space is met, and the support section (511) and an arch area main column (11) are integrally constructed;

hoisting the front side of the C-shaped space by adopting a first automobile crane (14), and arranging a safety upright rod or a falling protector or a ladder stand on the upper surface of a first arch section (512) of the rear arch before hoisting; the temporary fixing splicing is carried out between the first arch segment (512) and the support segment (511) through the arch segment temporary splicing device (6) with a temporary fixing structure, then the installation position of the first arch segment (512) and the support segment (511) is adjusted through the arch segment adjusting device (7) with a temporary fixing structure, after the condition of picking the hook of the crane is provided,

Welding a first temporary rigid diagonal rod (15) between the first arch segment and the arch region main column (11) to restrict welding deformation of the arch steel (51) in the plane;

fourth, repeating the second to third steps to install the first arch segment of the front row arch;

step five, adopting a tower crane close to the installation side to install a connecting beam (52), and welding main welding seams of a first arch section (512) and a support section (511) in a rear arch (5 a) and a front arch (5 b) after the installation is completed;

step six, repeating the step two to the step five, and installing the first arch segments on the opposite sides according to the same method;

step seven, adopting a second automobile crane (16), repeating the steps two to six, installing a second arch segment (513) on the first arch segment (512), welding a second temporary rigid diagonal rod (17) between the second arch segment (513) and the arch region main column (11), dismantling a steel wire rope of an arch segment adjusting device on the first arch segment (512) after welding is finished, reserving the first temporary rigid diagonal rod (15), and hanging a horizontal net below the floor beam (3) in the first arch region to prevent high altitude falling;

step eight, adopting a third automobile crane (18), repeating the steps two to six, installing a third arch segment (514) on the second arch segment (513), and adjusting the same pre-lifting height when the arch segment is in place according to the simulated and calculated arch segment deformation height to ensure that the welded arch segment meets the design precision; welding a third temporary rigid diagonal rod (18) between a third arch segment (514) and the arch region main column (11), wherein the segment of arch is required to be welded for at least 1/5 length of a main welding line before the automobile crane is unhooked, continuing to be welded after unhooking, dismantling a steel wire rope of an arch segment adjusting device on the second arch segment (513) after welding is completed, and reserving the third temporary rigid diagonal rod (18);

Step nine, installing the closure sections (515) of the arch sections, measuring the actual sizes of the closure sections in advance, checking the sizes of the components, sequentially welding the two arch sections of the front row and the rear row, and checking and accepting the arch sections after all welding work is completed;

step ten, after the arch segment is accepted, removing the steel wire rope and the first, second and third temporary rigid diagonal rods of the arch segment adjusting device on the third arch segment (514), performing deformation monitoring in the removing process, comparing deformation data with construction simulation data, and performing next procedure installation to meet the design requirement; according to calculation, after the temporary rigid diagonal rods are removed, the main arch deformation is smaller than 1mm and is qualified;

eleventh, a fourth automobile crane (19) is adopted, a rear row arch hanging column (10) is installed, and a hanging cage or a climbing vehicle is adopted as an operation platform; according to construction simulation, firstly installing an under-arch hanging column (101) in a rear arch surface, and then installing the under-arch hanging column (101) in a front arch surface, wherein the influence on arch deformation is less than 1mm;

step twelve, adopting a fourth automobile crane (19), installing a rear arch two-layer arch area floor girder (31) from two sections to the middle section, integrally correcting after the installation, and welding from the middle section to two ends;

thirteenth, a fourth automobile crane (19) is adopted, and a section bottom section (103) of a rear row arch is installed;

Fourteen, a fourth automobile crane (19) is adopted to install a floor girder (41) in a non-arch area below the rear row arch; after the installation is completed, the whole correction is carried out, and welding is carried out from the middle section to the two ends;

fifteen, adopting a fourth automobile crane (19) to sequentially install arch area floor girders (31) between arch lower hanging columns in a rear arch surface from bottom to top;

sixthly, installing a floor girder (31) in an arch area between an under-arch hanging column (101) of the front arch and the under-arch hanging column by adopting the same installation method as that of the rear arch;

seventeenth, adopting a tower crane to install a non-arch area floor secondary beam (42) of the first floor;

eighteenth, adopting a tower crane or an automobile crane to install all other two layers of arch area floor beams (3) and non-arch area floor beams (4);

nineteenth, repeating the eighteenth step, and adopting a tower crane or an automobile crane to install all the other three-layer and four-layer arch area floor beams (3) and non-arch area floor beams (4);

twenty, adopting a tower crane or an automobile crane to install all other five layers of arch area floor beams (3), non-arch area floor beams (4) and arch hanging columns (102);

step twenty-one, adopting a tower crane or an automobile crane to install all six-layer arch area floor beams (3) and non-arch area floor beams (4), and completing the installation of the internal steel structure;

And twenty-two steps, paving a floor support plate on the floor beam from the first layer upwards, pouring floor slab concrete, and completing building construction in the C-shaped space.

5. The flexible back tension hoisting construction method for the arch structure inside the steel frame according to claim 4, wherein the construction method comprises the following steps:

in the second step, the arch segment temporary splicing device (6) is arranged on the arch segment, the arch segment comprises a support segment (511) and a first arch segment (512), the arch segment comprises a positioning plate (61), a splicing ear plate (62), a fixed clamping plate (63) and a fixed bolt (65), the splicing position is defined as the lower side and the upper side based on the height of the elevation,

the positioning plate (61) is diagonally and symmetrically arranged at the upper side and the lower side of the splicing position, comprises a lower positioning plate (611) arranged at the lower side of the side surface of the top end of the support section (511) and an upper positioning plate (612) arranged at the upper side of the side surface of the bottom end of the first arch section (512), one half part of the positioning plate (61) is fixedly connected with the arch section, the other half parts extend out of the arch section and extend into the splicing position, the bottom end of the first arch section (512) is respectively clamped and limited at the upper side and the lower side of the splicing position by the positioning plate (61) at the top end of the support section (511), the bottom surface of the first arch section (512) is butted with the top surface of the support section (511), the positioning plate (61) forms a vertical limiting piece,

The splicing ear plate (62) comprises a lower-section splicing ear plate (621) which is arranged on the upper side and the lower side of the side surface of the top end part of the support section (511) and an upper-section splicing ear plate (622) which is arranged on the upper side and the lower side of the side surface of the bottom end part of the first arch section (52), the lower-section splicing ear plate (621) and the upper-section splicing ear plate (622) are correspondingly arranged in pairs at the splicing positions and are positioned in the same vertical plane, the splicing ear plate (62) is provided with a splicing ear plate hole (623),

the fixed splint (63) cooperates every pair of concatenation otic placode (62), presss from both sides to establish in the both sides of every pair of concatenation otic placode (62), and upper segment concatenation otic placode (622) are pressed from both sides at the top of fixed splint (63), and lower segment concatenation otic placode (621) are pressed from both sides to the bottom of fixed splint (63), and fixed splint (63) are gone up and are opened corresponding concatenation otic placode hole (623) and have fixed splint hole (631), and fixed splint hole (631) pass through fixing bolt (65) anchor with concatenation otic placode hole (623).

6. The flexible back tension hoisting construction method for the arch structure inside the steel frame according to claim 5, wherein the construction method comprises the following steps: the workman stands on the main part building steel frame's that has been under construction main structure floor beam (1) through hunch section adjusting device (7) regulation first hunch section (512) installation angle and gesture, hunch section adjusting device (7), hunch district main column (11) structure lug (8) and first hunch section (512) regulation lug (9) all are located the top of main structure floor beam (20) position of main building steel frame, hunch section adjusting device (7) including chain (71), main hanging wire rope (72), regulation wire rope (73) and safety rope (75), chain (71) are connected with structure lug (8) to the one end of main hanging wire rope (72), chain (71) are connected to the other end of regulation wire rope (73) and regulation lug (9) pull, chain (71) are connected to the other end of regulation wire rope (73), and chain (71) are located the top of main structure floor beam (20) and pass through the workman and pull regulation, the one end and the main hanging wire rope (72) are connected with main hanging wire rope (9) fixedly.

7. The flexible back tension hoisting construction method for the arch structure inside the steel frame according to claim 6, wherein the flexible back tension hoisting construction method is characterized in that: the first arch section (512) is provided with two layers of connecting brackets connected with the arch area floor beams (3), an upper bracket (311) and a lower bracket (312) respectively correspond to the two layers of main structure floor beams (20),

the arch segment temporary splicing device (6) is positioned below the main body structure floor beam (20) corresponding to the lower bracket (312);

the arch segment adjusting device (7) is positioned above the main body structure floor beam (20) corresponding to the upper bracket (311).

8. The flexible back tension hoisting construction method for the arch structure inside the steel frame according to claim 6, wherein the flexible back tension hoisting construction method is characterized in that: the lower positioning plate (611) is symmetrically arranged on the support section (511) by a column shaft of the arched steel piece (51), the lower half part of the lower positioning plate (611) is fixedly connected on the support section (511), the upper half part of the lower positioning plate (611) extends out of the splicing position,

two upper positioning plates (612) are symmetrically arranged on the first arch section (512) to be installed in an arch section column axis manner, the upper half part of each upper positioning plate (612) is fixedly connected to the first arch section (512), and the lower half part of each upper positioning plate (612) extends out of the splicing position;

The splicing ear plates (62) are symmetrically arranged on the left and right sides of the arch section column shaft and are positioned on the outer sides of the positioning plates, two splicing ear plates are arranged on each side of the upper section splicing ear plate (622), and two splicing ear plates are arranged on each side of the lower section splicing ear plate (621);

the bottom of the upper segment splicing ear plate (622) is higher than the bottom end surface of the first arch segment (512), the top of the lower segment splicing ear plate (621) is lower than the top end surface of the support segment (511), and the splicing ear plate holes (623) are vertically arranged at intervals on the upper segment splicing ear plate (622) or the lower segment splicing ear plate (621);

the fixing clamp plate (63) comprises an inner plate (632) arranged on the inner side of the spliced ear plate (62) and an outer plate (633) arranged on the outer side of the spliced ear plate (62), the inner plate (632) is connected with the spliced ear plate (62) in advance, and the inner plate (632) forms a left limiting piece and a right limiting piece;

the plate width of the fixing clamp plate (63) is smaller than that of the splicing ear plate (62), and the outer edges of the fixing clamp plate and the splicing ear plate are flush.

9. The flexible backpull lifting construction method of the arch structure inside the steel frame according to any one of claims 5 to 8, wherein the construction method comprises the following steps:

the steps are divided into the following steps:

step a, fixedly connecting a lower splicing ear plate (621) and a lower positioning plate (611) on a preset position of a support section (511) in advance; fixedly connecting an upper segment spliced lug plate (622) and an upper side positioning plate (612) at a preset position of a first arch segment (512) in advance; then the inner plate (632) is temporarily connected with the upper-section splicing ear plate (622) in advance through a fixing bolt (65);

Step b, hoisting the first arch segment (512) to a connecting position, and then connecting the arch segment adjusting device (7) with the first arch segment (512) in advance;

step c, a worker steps on a floor beam of a main structure to operate an arch segment adjusting device, a crane gradually lifts a to-be-first arch segment (512) to a preset position, then a temporary arch column splicing device is spliced and aligned in place, wherein an inner plate (632) serves as a horizontal limiting piece to limit the horizontal position of the first arch segment (512), positioning plates serve as vertical limiting pieces on the upper side and the lower side respectively to limit the vertical position of the first arch segment (512), and the positioning plates are aligned in place at one time, and in the process, the worker assists the installation posture and the angle of an arch column through operating the arch segment adjusting device;

step d, after the adjustment is finished, a worker climbs in place by adopting a climbing ladder arranged on the back side of the arch section, an outer plate (633) of the fixed clamping plate (63) is spliced in place, and then all the fixed bolts are screwed and fixed;

and e, connecting a first temporary rigid diagonal rod between the first arch segment (512) and the arch region main column (11), and then disassembling the arch segment adjusting device.