CN-122014029-A - Heavy cantilever structure supporting and unloading integrated tool and construction method

Abstract

The invention discloses a heavy cantilever structure supporting and unloading integrated tool and a construction method, wherein the tool comprises a temporary supporting column, an unloading steel bracket, a cross-shaped conversion tool, a limiting device, an unloading base plate and an unloading device, wherein the unloading base plate is arranged on the top of the temporary supporting column, the cross-shaped conversion tool is arranged between the top of the temporary supporting column and the cantilever structure and is fixed with the unloading steel bracket of the temporary supporting column through the limiting device to form a stable supporting system, and the unloading device is arranged between the unloading steel bracket and the cross-shaped conversion tool and is alternately loaded through controlling the unloading device and the base plate to form an orthogonal unloading system. The tool can be used as a stable temporary support of an upper heavy cantilever structure in the early stage, and can be used for controlling the unloading capacity in a grading and accurate manner through alternately carrying an unloading device and an unloading backing plate in the later stage. The invention ensures the safety of the construction and unloading process of the heavy overhanging structure, effectively realizes the final configuration of the overhanging structure, and has important engineering application significance.

Inventors

• Cao Zuosheng
• Miao Shuming
• LIU YUANLIANG
• ZHAO WENYAN
• LIU CHANGGANG
• LIU YUFU
• YANG SHUSEN
• LIU XIAOLIANG
• WANG PEIZHAO
• PAN WENZHI
• CHENG LONG

Assignees

• 浙江精工钢结构集团有限公司

Dates

Publication Date

20260512

Application Date

20241112

Claims (9)

1. 1. The heavy cantilever structure supporting and unloading integrated tool is characterized by comprising a temporary supporting column, an unloading steel bracket, a cross-shaped conversion tool, a limiting device, an unloading base plate and an unloading device, wherein the unloading base plate is arranged on the top of the temporary supporting column, the cross-shaped conversion tool is arranged between the top of the temporary supporting column and the cantilever structure and is fixed with the unloading steel bracket of the temporary supporting column through the limiting device to form a stable supporting system, and the unloading device is arranged between the unloading steel bracket and the cross-shaped conversion tool and is alternately loaded through controlling the unloading device and the base plate to form an orthogonal unloading system.
2. 2. The heavy cantilever structure supporting and unloading integrated tool of claim 1, wherein the temporary support column is a concrete steel column, square steel ribs are arranged in the temporary support column, and the unloading steel corbels are welded on the side surfaces of the top ends of the square steel ribs.
3. 3. The integrated supporting and unloading tool for the heavy cantilever structure of claim 1, wherein the cross end part of the cross-shaped conversion tool is hinged and fixed with the unloading steel bracket through a limiting device to form a stable center supporting system.
4. 4. The integrated fixture for supporting and unloading the heavy cantilever structure according to claim 1, wherein the unloading base plate is layered on the top of the temporary supporting column, is equally divided into a plurality of sectors, is formed by alternately stacking polytetrafluoroethylene plates and steel plates with extremely low friction coefficients, and is convenient for the graded extraction of the unloading working conditions.
5. 5. The integrated supporting and unloading tool for the heavy cantilever structure of claim 1, wherein the unloading devices are symmetrically arranged on the unloading steel corbels, so that the upper heavy load is equally divided, and the bearing capacity of the unloading tool is improved.
6. 6. The integrated fixture for supporting and unloading the heavy cantilever structure according to claim 1, wherein the limiting device comprises a connecting plate with a through length, clamping plates, bolts and mounting holes for connecting the clamping plates are arranged at the upper end and the lower end of the connecting plate, and the mounting holes at the upper end of the connecting plate are oblong holes in the vertical direction, so that the cross conversion fixture can only move in the unloading direction in the unloading process.
7. 7. The integrated supporting and unloading tool for the heavy cantilever structure, as set forth in claim 1, is characterized in that the end part of the cross-shaped conversion tool and the unloading steel corbel are designed with variable cross sections, so that construction measures are saved.
8. 8. The integrated supporting and unloading tool for the heavy cantilever structure of claim 1, wherein the unloading steel corbels and the cross-shaped conversion tool are provided with stiffening plates on the side surfaces.
9. 9. Construction method using the integrated tool according to any one of claims 1-8, characterized in that it comprises the following steps: firstly, carrying out calculation and analysis on the supporting working condition and the unloading working condition of the heavy cantilever structure, and extracting data such as supporting, unloading counterforce value, unloading displacement and the like; Installing a temporary support column, an unloading backing plate, a cross-shaped conversion tool and a limiting device under the overhanging structural column; Step three, mounting an overhanging structure from bottom to top by depending on a temporary support column, and reversely arching for presetting according to calculation deformation; finishing the construction of the upper main body structure, reaching the strength and checking and accepting; And fifthly, configuring an unloading device according to the counter force value, placing the unloading device between the unloading steel bracket and the cross-shaped conversion tool, controlling the unloading device by a computer to realize alternate bearing of the unloading device and the unloading backing plate, and after the backing plate is removed in blocks, enabling the cantilever structure to stably reach the theoretical configuration, and completing unloading.

Description

Heavy cantilever structure supporting and unloading integrated tool and construction method Technical Field The invention relates to the technical field of building steel structures, in particular to a heavy cantilever structure supporting and unloading integrated tool and a construction method. Background Along with the demand on the aesthetic appearance of constructional engineering is higher and higher, large spans, complicated space steel structures such as overhanging, hanging and the like emerge, and in the construction process of the large overhanging steel structures, a temporary supporting structure is required to be erected to ensure the construction of the overhanging structure because a structural system is not formed, the number of structural layers of overhanging parts is excessive and the span is large, the supporting structure can bear hundreds or even thousands of tons of loads along with the continuous increase of the number of construction layers, and the existing lattice type supporting frame cannot meet the bearing demand. In the unloading process, the main body structure stress system is converted to generate larger vertical displacement, so that the conversion of the cantilever structure stress system in heavy load and large displacement deformation is ensured, and the technical problem to be solved is that the structure unloading is stably completed. Therefore, an economical, reasonable, safe and efficient heavy support and unloading integrated tool and a construction method thereof are needed to solve the problems. Disclosure of Invention Aiming at the problems that a supporting jig of a traditional cantilever structure cannot meet the requirements of temporary supporting and grading unloading of heavy loads and the like, the invention provides a construction tool and a construction method for integrating heavy supporting and unloading. The invention ensures the safety of the construction and unloading process of the heavy overhanging structure, effectively realizes the final configuration of the overhanging structure, and has important engineering application significance. The technical aim of the invention is achieved through the following technical scheme that the heavy cantilever structure supporting and unloading integrated tool comprises a temporary supporting column, an unloading steel bracket, a cross-shaped conversion tool, a limiting device, an unloading base plate and an unloading device, wherein the unloading base plate is arranged on the top of the temporary supporting column, the cross-shaped conversion tool is arranged between the top of the temporary supporting column and the cantilever structure and is fixed with the unloading steel bracket of the temporary supporting column through the limiting device to form a stable supporting system, and the unloading device is arranged between the unloading steel bracket and the cross-shaped conversion tool and is alternately carried by controlling the unloading device and the base plate to form an orthogonal unloading system. The cross type conversion tool is used for directly transmitting the cantilever structure load to the lower temporary support column through the middle core area in the supporting stage, converting the cantilever structure load to the end part of the cross type unloading tool in the unloading stage, and transmitting the cantilever structure load to the lower temporary support column through the unloading device to unload the steel corbel. Further, the temporary support column adopts a concrete steel rib column, a square steel rib is arranged in the temporary support column, and the unloading steel corbel is welded on the side face of the top end of the square steel rib. The temporary support column adopts the structural structure of the steel skeleton column and the orthogonal unloading steel corbel, and the cooperative action of the steel skeleton column and the concrete further improves the bearing capacity and the unloading capacity of the temporary support column. Further, the cross end part of the cross-shaped conversion tool is hinged and fixed with the unloading steel bracket through a limiting device, so that a stable center supporting system is formed. Furthermore, the unloading backing plate is layered on the top of the temporary supporting column and is equally divided into a plurality of sectors (can be divided into four sectors), and the unloading backing plate is formed by alternately stacking polytetrafluoroethylene plates and steel plates with extremely low friction coefficients, so that the unloading working condition is conveniently extracted in a grading manner. Further, the unloading devices are symmetrically arranged on the unloading steel corbels, so that the upper heavy load is equally divided. The unloading device adopts the jack, and 2 or 4 jacks can be symmetrically placed to the unloading steel corbel for upper portion heavy load 2 or 4 equals to divide, in order to improve the