CN-121976630-A - Roof truss lower hanging column structure system and construction method thereof

CN121976630ACN 121976630 ACN121976630 ACN 121976630ACN-121976630-A

Abstract

The invention discloses a roof truss lower hanging suspension column structure system and a construction method thereof, wherein the roof truss lower hanging suspension column structure system comprises a supporting steel beam, a supporting steel beam and a supporting steel beam, wherein the supporting steel beam comprises a longitudinal girder, a transverse girder and a secondary girder; the system comprises a building main body, a pull rod, an end pipe, a stand column, a support truss and a support girder, wherein the pull rod is obliquely arranged, the upper end of the pull rod is connected with the building main body, the lower end of the pull rod is connected with the front end of a longitudinal girder, the end pipe is vertically arranged at the front end of the longitudinal girder, the stand column is vertically arranged between two adjacent layers of end pipes and on the uppermost layer of end pipe, and the support truss is arranged between the uppermost layer of support girder and the stand column. The invention adopts the cooperation of the supporting truss, the combined upright post and the pull rod to form a temporary stable structural system, changes the stress state of the suspension post structural system, solves the problems of easy cracking of the overhanging floor slab and the downward deflection of the overhanging component caused by overlarge suspension post load, and simultaneously adopts a forward temporary fixing and reverse running water disassembling mode to reduce the instantaneous downward deflection of concentrated load, reduce displacement deformation and reduce error accumulation, thereby ensuring the stability and controllable deformation of the whole structure.

Inventors

JIANG XUNWEI
WANG DAWEI
MA YUFENG
QI XIAOQIANG
LV WEIWEI
WANG JUNYANG
ZHANG XU
WANG JIAHAO
Zhao Mingzi
WANG WENLONG

Assignees

北京建工集团有限责任公司

Dates

Publication Date: 20260505
Application Date: 20260122

Claims (7)

1. The utility model provides a hanging column structure system under roofing truss which characterized in that includes: The support steel girder (1) comprises longitudinal girders (11), transverse girders (12) and secondary girders (13), wherein the longitudinal girders (11) are horizontally and at intervals fixed on a building main body, the transverse girders (12) are horizontally arranged between the front ends of two adjacent longitudinal girders (11), and between the longitudinal girders (11) at the two most sides and a core tube of the building main body, and the secondary girders (13) are transversely arranged between the two adjacent longitudinal girders (11); the pull rod (2) is obliquely arranged, the upper end of the pull rod (2) is connected with the building main body, and the lower end of the pull rod is connected with the front end of the longitudinal main beam (11); the end pipe (3) is vertically arranged at the front end of the longitudinal main beam (11); The upright posts (4) are vertically arranged between two adjacent layers of end pipes (3) and on the uppermost layer of end pipes (3); and the support truss (5) is arranged between the support steel beam (1) and the upright post (4) at the uppermost layer.
2. The roof truss lower hanging column structure system according to claim 1, wherein the pull rod (2) comprises an inclined support (21), a mounting seat (22) and a connecting seat (23), the inclined support (21) is obliquely arranged, the mounting seat (22) is arranged at two ends of the inclined support (21), the connecting seat (23) is arranged at the front ends of the building main body and the longitudinal girder (11), and the mounting seat (22) and the connecting seat (23) are fixedly connected through bolts.
3. The roof truss lower hanging column structure system according to claim 1, wherein the end positions of the upright posts (4) and the end pipes (3) are vertically provided with lug plates (6), fixing plates (7) are vertically arranged between two sides of the upper lug plates (6) and the lower lug plates (6), and locking pins (71) penetrating through the lug plates (6) are arranged at the upper ends and the lower ends of the fixing plates (7).
4. The roof truss lower hanging column structure system according to claim 3, wherein a round hole (72) for the locking pin (71) to penetrate is formed in the upper end of the fixing plate (7), and a strip-shaped hole (73) for the locking pin (71) to penetrate is vertically formed in the lower end of the fixing plate.
5. A construction method of a roof truss lower hanging column structure system is characterized by comprising the following steps: S1, horizontally fixing a longitudinal girder (11) on one side of the main body of a building, enabling an end pipe (3) on the longitudinal girder to vertically upwards, respectively installing two ends of a pull rod (2) between the longitudinal girder (11) and the main body of the building, then fixing a transverse girder (12) between the end part of the longitudinal girder (11) and a core tube of the main body of the building, sequentially reciprocating, realizing the installation of all the longitudinal girders (11) and the transverse girder (12), and finally fixing a secondary girder (13) between two adjacent longitudinal girders (11), thereby completing the installation and fixation of a first layer of support girder (1); S2, hoisting the first layer of upright posts (4) above each end pipe (3), and carrying out preliminary positioning connection on the upright posts (4) and the end pipes (3) by utilizing the cooperation of the lug plates (6) and the fixed plates (7), wherein no welding operation is carried out between the upright posts (4) and the end pipes (3); S3, mounting and fixing the second layer of supporting steel beams (1), wherein an end pipe (3) at the lower end position on the second layer of supporting steel beams (1) is in primary positioning connection with the upper end of the first layer of upright posts (4) by utilizing the cooperation of the lug plates (6) and the fixing plates (7), and welding operation is not performed between the upright posts (4) and the end pipe (3); S4, hoisting the second layer of upright posts (4) above each end pipe (3), and carrying out preliminary positioning connection on the upright posts (4) and the end pipes (3) by utilizing the cooperation of the lug plates (6) and the fixed plates (7), wherein no welding operation is carried out between the upright posts (4) and the end pipes (3); s5, installing and fixing the third-layer support steel beam (1), wherein an end pipe (3) at the lower end position on the third-layer support steel beam (1) is in primary positioning connection with the upper end of the second-layer upright post (4) by utilizing the cooperation of the lug plate (6) and the fixing plate (7), and welding operation is not performed between the upright post (4) and the end pipe (3); S6, hoisting the third-layer upright post (4) above each end pipe (3), and performing welding operation between the upright post (4) and the end pipe (3); s7, fixing the support truss (5) between the support steel beam (1) and the upright post (4) at the uppermost layer; S8, dismantling the pull rod (2) at the topmost layer, then performing welding operation on the upper connecting position of the second-layer upright post (4), and then pouring the floor at the topmost layer; S9, welding the lower connecting position of the second layer of upright posts (4), dismantling the pull rod (2) of the middle layer, welding the upper connecting position of the first layer of upright posts (4), and pouring the middle layer of floor slab; S10, welding the lower connecting position of the first layer of upright posts (4), dismantling the pull rod (2) at the bottommost layer, and pouring the floor at the bottommost layer.
6. The construction method of the roof truss lower hanging column structure system according to claim 5, wherein when the pull rod (2) of each layer is removed, a connecting seat (23) at the lower end of the pull rod (2) is cut, then a short steel bar is welded on a steel reinforcement cage of a floor slab, the short steel bar is utilized to temporarily support the pull rod (2), after the pouring of the floor slab is completed, the short steel bar is cut, and the pull rod (2) is removed.
7. The construction method of the roof truss lower hanging column structure system is characterized in that when steel structure construction and pouring construction are carried out, stress and displacement deformation of all the columns (4) are monitored by adopting the cooperation of a vibrating wire strain gauge and three-dimensional laser scanning.

Description

Roof truss lower hanging column structure system and construction method thereof Technical Field The invention relates to the field of building construction, in particular to a roof truss lower hanging column structure system and a construction method thereof. Background With the continuous progress of economic development, the requirements of owners on building quality and functions are increasingly improved, and an innovative overhanging column structure system is recently developed to adapt to the diversified requirements. According to the structure, the number of the peripheral upright posts at the lower layer is reduced, the hanging posts are arranged at the edge of the upper layer and used for bearing the load of floors, and the weight of the overhanging and hanging post parts is balanced through the roof truss, so that a wider and shielding-free shared space is created, and smooth passing of people and stream is facilitated. Although the overhanging column structure has many advantages, in the actual construction process, if the conventional bottom-up construction steps are followed, the structure cannot form a perfect self-balancing structure until the column is not installed. At this time, the upper flange of the overhanging part bears the tensile force, and along with the increase of the building height, the weight of the upper structure can be transferred to the lower layer through the suspender, so that the tensile stress of the lower layer floor slab is further increased, and the risk of cracking and displacement deviation accumulation of the floor slab in the construction stage is increased. In order to solve the above problems, the prior art generally adopts a temporary supporting mode for large-sized components such as overhanging and the like, but when the temporary supporting is intensively unloaded, the generated concentrated stress can cause the cracking of the floor slab and the displacement downwarping which cannot be repaired, and the improvement is needed. Disclosure of Invention Aiming at the defects of the prior art, the invention aims to provide a roof truss lower hanging column structure system which can form a temporary stable structure system, and adopts a forward temporary fixing and reverse running water dismantling mode to reduce the instantaneous downwarping of concentrated load, thereby ensuring the stability of the whole structure and controllable deformation. The technical aim of the invention is achieved by the following technical scheme that the lower hanging column structure system of the roof truss comprises: The support steel girder comprises longitudinal girders, transverse girders and secondary girders, wherein the longitudinal girders are horizontally and alternately fixed on the building main body, the transverse girders are horizontally arranged between the front ends of two adjacent longitudinal girders, and between the longitudinal girders at the two most sides and a core tube of the building main body, and the secondary girders are horizontally arranged between the two adjacent longitudinal girders; The pull rod is obliquely arranged, the upper end of the pull rod is connected with the building main body, and the lower end of the pull rod is connected with the front end of the longitudinal girder; the end pipe is vertically arranged at the front end of the longitudinal girder; the upright posts are vertically arranged between two adjacent layers of end pipes and on the uppermost layer of end pipes; The support truss is arranged between the support steel beam and the upright post on the uppermost layer. The invention can be further configured in a preferred example that the pull rod comprises an inclined support, an installation seat and a connecting seat, wherein the inclined support is obliquely arranged, the installation seat is arranged at two ends of the inclined support, the connecting seat is arranged at the front ends of the building main body and the longitudinal girder, and the installation seat is fixedly connected with the connecting seat through bolts. In a preferred example, the invention can be further configured that the end positions of the upright post and the end pipe are vertically provided with ear plates, a fixing plate is vertically arranged between the two sides of the upper ear plate and the lower ear plate, and locking pins penetrating through the ear plates are arranged at the upper end and the lower end of the fixing plate. The invention can be further configured in a preferred example that the upper end of the fixing plate is provided with a round hole for the lock pin to pass through, and the lower end of the fixing plate is vertically provided with a strip-shaped hole for the lock pin to pass through. The invention further aims to provide a construction method of the roof truss lower hanging suspension column structure system, which mainly adopts a construction mode of forward temporary fixation and reverse running water disasse