CN-122013988-A - Large-span steel structure sectional accumulated slippage construction method

CN122013988ACN 122013988 ACN122013988 ACN 122013988ACN-122013988-A

Abstract

The invention provides a large-span steel structure subsection accumulated sliding construction method which comprises the following steps of S1, dividing a construction area into a truss total section integral splicing area and a truss block falling area, arranging a truss subsection ground splicing area outside the construction area, S2, arranging ground splicing jig frames, integral splicing jig frames and sliding measures, S3, splicing truss sections in the truss subsection ground splicing area, S4, integrally splicing the truss sections into truss total sections, sliding and splicing the next truss total section, repeating the operation to gradually slide to complete truss blocks spliced by a plurality of truss total sections, S5, integrally sliding the truss blocks to appointed and falling positions, repeatedly completing all truss block splicing falling positions, S6, performing interpolation between adjacent truss blocks, and performing truss total section ground splicing in the truss total section integral splicing area to complete construction. The method can avoid disturbance of floor construction on the traditional crane to the floor structure, simultaneously reduces the use of a lower interlayer support frame body and shortens the construction period.

Inventors

LI PENG
SUN CHUNE
GONG XIUGANG
ZHANG QINGHUA
CHENG JUNXIN
BAI JIANAN

Assignees

中建二局第二建筑工程有限公司

Dates

Publication Date: 20260512
Application Date: 20260226

Claims (9)

1. The sectional accumulated slippage construction method of the large-span steel structure is characterized by comprising the following steps of: S1, dividing a construction area into a truss total section whole splicing area and a truss block falling area, and arranging a truss sectional ground splicing area outside the construction area; S2, performing construction preparation, arranging a ground splicing jig frame in a truss sectional ground splicing area, arranging a whole splicing jig frame in a truss main section whole splicing area, and arranging sliding measures in the truss main section whole splicing area and a truss sectional falling area; S3, truss sectional assembly, wherein truss sections are assembled in a truss sectional ground assembly area; s4, hoisting and transferring truss sections to a truss section whole splicing area, splicing truss sections into truss sections in the air, sliding one truss section into a construction area after finishing, splicing the next truss section in the empty truss section whole splicing area, splicing two truss sections, repeating operation and gradually sliding to finish truss sections spliced by a plurality of truss sections; s5, sliding the whole truss blocks into a construction area to the designated truss block falling area and falling, repeating the steps S3-S4 to finish the split assembly of all the truss blocks, and sliding the truss blocks to the designated truss block falling area; and S6, performing interpolation between adjacent truss blocks, and performing truss block ground assembly in a truss block integral assembly area to finish construction.
2. The large-span steel structure sectional accumulated sliding construction method according to claim 1, wherein the truss total sectional integral splicing area is a first block and a fifth block which are positioned at two ends of a construction area, the truss block falling area comprises a second block, a third block and a fourth block which are sequentially positioned between the first block and the fifth block, the truss block slides from the second block to a direction far away from the first block, the truss block slides from the third block and the fourth block to a direction far away from the second block, a first interpolation block is arranged between the second block and the third block, a second interpolation block is arranged between the third block and the fourth block, and the truss sectional ground splicing area is respectively arranged outside the first block and the fifth block.
3. The method for sectional accumulated slippage construction of a large-span steel structure according to claim 1, wherein the floor jig comprises a section steel, a bottom embedded part and a lateral support steel groove.
4. The large-span steel structure sectional accumulation sliding construction method according to claim 3, wherein the integral splicing jig frame comprises a plurality of supporting components, the supporting components comprise three supporting columns, a pair of crossed diagonal rods are arranged between the two transverse supporting columns, diagonal rods are arranged between the two transverse supporting columns and the ground, one diagonal rod is connected to the bottom of the other supporting column, and when the integral splicing of the total sections of the first truss is carried out, H-shaped steel supports are arranged on the side faces of the first truss.
5. The large-span steel structure sectional accumulation sliding construction method according to claim 4, wherein the number of the sliding measures is at least three, the sliding measures are distributed on two sides and the middle of a construction area, the sliding measures comprise sliding tracks, steel sliding blocks, thrusters and thrusting lug plates, concrete columns and track beams of factory building structures are arranged on the two sides and the middle of the construction area, the concrete columns are supported at the bottoms of the track beams, the top heights of the concrete beams are flush with the tops of the integral splicing jig frames, sliding embedded parts are arranged on the track beams, the sliding tracks are channel steel tracks, the sliding tracks are arranged on the track beams through the sliding embedded parts, the thrusting lug plates are arranged on the lower chord of a truss, the steel sliding blocks are arranged at the bottoms of the truss and can slide in the sliding tracks, one end of each thrusting device is rotatably connected to each thrusting lug plate, and one end of each positioning device is arranged on each sliding track.
6. The large-span steel structure sectional accumulated sliding construction method according to claim 5 is characterized in that truss blocks are placed in a mode of replacing a support base plate and a steel slide block, the truss blocks are jacked up by a hydraulic jack after the truss blocks slide in place, the steel slide block and a sliding rail are removed, the support base plate is installed, and truss block girder placement is completed.
7. The method for constructing the large-span steel structure sectional accumulated slip according to claim 1, wherein the trusses are welded H-shaped steel to form sheet type orthogonal trusses, the section of truss rod members is in box type and H type, the main truss is divided into 5 truss sections, truss rod members are manufactured in factory parts and transported to a truss section ground assembling area to be assembled into truss sections, the truss sections are hung to the high altitude by crawler cranes and placed on an integral assembly jig frame to be integrally assembled in truss sections, and after the assembly welding of one truss section is completed, the truss section is assembled and constructed in a sliding accumulated mode.
8. The method for constructing the large-span steel structure sectional accumulation sliding according to claim 1, wherein in the step S3, the truss sectional assembling process comprises the steps of jig frame positioning paying-off, assembling upper and lower chords, assembling straight web members and assembling inclined web members, and finally, the whole welding is completed.
9. The method for constructing the large-span steel structure sectional cumulative sliding according to claim 1, wherein in the step S4, the whole splicing and hoisting sequence of the truss section is a hoisting middle block, blocks on two sides of the hoisting middle block, two blocks on the outer side of the hoisting middle block, and a hoisting clerestory.

Description

Large-span steel structure sectional accumulated slippage construction method Technical Field The invention relates to the technical field of steel structure house construction, in particular to a large-span steel structure sectional accumulated sliding construction method. Background The steel structure form of the newly built factory building is continuously developed from traditional single-layer single-span, light weight and the like to modeling diversification, large-span, node complicacy and general quantification. When the main structure of the lower part of the large-span steel structure system is a multi-layer concrete structure beam slab, because the load born by the floor slab is limited, if the traditional construction method is adopted to directly hoist on the floor slab, the lower supporting system of the floor slab cannot be dismantled, so that the construction of penetration cannot be carried out in a plurality of floors of the lower part, the construction period is seriously influenced, a large amount of turnover materials are accumulated, the large-tonnage crane is easy to damage the floor slab during the construction of the floor slab, and the later repair quantity is large. Disclosure of Invention In order to overcome the defects of the prior art, the invention provides a large-span steel structure sectional accumulated sliding construction method, which can avoid disturbance of floor construction on a traditional crane to the floor structure, reduce the use of a lower interlayer support frame body and shorten the construction period. The invention discloses a sectional accumulated slipping construction method of a large-span steel structure, which comprises the following steps of: S1, dividing a construction area into a truss total section whole splicing area and a truss block falling area, and arranging a truss sectional ground splicing area outside the construction area; S2, performing construction preparation, arranging a ground splicing jig frame in a truss sectional ground splicing area, arranging a whole splicing jig frame in a truss main section whole splicing area, and arranging sliding measures in the truss main section whole splicing area and a truss sectional falling area; S3, truss sectional assembly, wherein truss sections are assembled in a truss sectional ground assembly area; s4, hoisting and transferring truss sections to a truss section whole splicing area, splicing truss sections into truss sections in the air, sliding one truss section into a construction area after finishing, splicing the next truss section in the empty truss section whole splicing area, splicing two truss sections, repeating operation and gradually sliding to finish truss sections spliced by a plurality of truss sections; s5, sliding the whole truss blocks into a construction area to the designated truss block falling area and falling, repeating the steps S3-S4 to finish the split assembly of all the truss blocks, and sliding the truss blocks to the designated truss block falling area; and S6, performing interpolation between adjacent truss blocks, and performing truss block ground assembly in a truss block integral assembly area to finish construction. Further, the truss total section whole splicing area is a first block and a fifth block which are positioned at two ends of the construction area, the truss block falling area comprises a second block, a third block and a fourth block which are sequentially positioned between the first block and the fifth block, the truss block slides from the second block to a direction far away from the first block, the truss block slides from the third block and the fourth block to a direction far away from the second block, a first embedded block is arranged between the second block and the third block, a second embedded block is arranged between the third block and the fourth block, and the truss sectional ground splicing area is respectively arranged at the outer sides of the first block and the fifth block. Further, the floor jig frame comprises a section steel, a bottom embedded part and a lateral support steel groove. Further, the whole jig frame comprises a plurality of supporting components, each supporting component comprises three supporting columns, a pair of crossed diagonal braces are arranged between the two transverse supporting columns, diagonal braces are arranged between the two transverse supporting columns and the ground, one diagonal brace is connected to the bottom of the other supporting column, and when the whole truss is spliced in the whole section of the first truss, H-shaped steel supports are arranged on the side faces of the first trusses. Further, the number of the sliding measures is at least three, the sliding measures are distributed on two sides and the middle of a construction area, the sliding measures comprise sliding tracks, steel sliding blocks, thrusters and thrusting lug plates, concrete columns and track beams which are