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CN-122013992-A - High-altitude large-span steel structure corridor installation method

CN122013992ACN 122013992 ACN122013992 ACN 122013992ACN-122013992-A

Abstract

The invention discloses an installation method of a high-altitude large-span steel structure corridor, which comprises the steps of S1, a step of sectionally prefabricating, wherein each side of a main truss of the corridor is respectively processed into at least two small trusses, the small trusses are transported to a site and assembled to form the main truss, S2, a step of calculating and selecting a lifting point, wherein the position of the center of gravity of the main truss is calculated, connecting intersection points of web members on two sides of the center of gravity and an upper chord are selected to serve as lifting points, S3, a step of lifting and positioning is carried out by using a lifting device to lift the main truss through the lifting points, the main truss is positioned on a high-altitude support, S4, a step of temporarily stabilizing is carried out, wherein a steel wire rope is pulled on the main truss positioned by the first truss, and after the steel wire rope is regulated to be stabilized, and S5, a step of wholly stabilizing is carried out, and connecting members are installed between the adjacent main trusses to remove the steel wire rope. The invention solves the technical problem in the installation of the high-altitude large-span steel structure corridor through the process of 'subsection prefabrication, accurate hoisting, temporary stabilization and integral forming', and realizes safe, economic and efficient construction.

Inventors

  • CHEN XI
  • ZHANG TING
  • WANG DAGEN
  • ZHAO PENG
  • WANG HONGLIANG
  • WANG ZEMIN
  • Xia Ke Er external force
  • MA HONGWEI
  • LIU LONG
  • WANG ZEYI

Assignees

  • 中建新疆建工集团第一建筑工程有限公司

Dates

Publication Date
20260512
Application Date
20251222

Claims (9)

  1. 1. The installation method of the high-altitude large-span steel structure corridor is characterized by comprising the following steps of: S1, a step of subsection prefabrication, namely respectively processing each side of a main truss (1) of the corridor into at least two small trusses (4), transporting to the site, and assembling to form the main truss (1) to be hoisted; S2, calculating and selecting a hanging point, namely calculating the gravity center position of the main truss (1), and selecting connecting intersection points (6) of web members and upper chord members at two sides of the gravity center as the hanging point; s3, hoisting and positioning, namely hoisting the main truss (1) through the hoisting point by using hoisting equipment to position the main truss on the high-altitude support (2); s4, a temporary stabilization step, namely, a steel wire rope (3) is pulled on the main truss (1) of the first truss in place, and after the steel wire rope (3) is regulated to be stabilized, the hoisting equipment can be unhooked; And S5, integrally stabilizing, namely installing connecting members between the adjacent main trusses (1) to form a stable integral structure, and removing the steel wire ropes (3).
  2. 2. The installation method according to claim 1, characterized in that in the step S3, a steel pipe sheet (5) is interposed as a wrap angle protector at the corner contact position of the steel wire rope (4) at the hanging point and the main truss (1).
  3. 3. The installation method according to claim 1, wherein the step S3 specifically comprises the steps of controlling the lowest point of the main truss (1) to be always higher than the set height of the bracket (7) of the support (2) in the lifting process, and pulling the main truss (1) to be accurately positioned on the support (2) by using a chain block after the height of the support end of the main truss (1) is basically consistent with the installation height.
  4. 4. The installation method according to claim 1, wherein in the step S4, the number of the steel wire ropes (3) is at least four, and the steel wire ropes are arranged on the chain block in a matching manner for adjusting the tightness thereof.
  5. 5. The method of installation according to claim 1, wherein in step S5, the connection members comprise horizontal supports and vertical diagonal braces, and the main truss (1) forms a stable space frame structure after the connection members are installed.
  6. 6. The method according to claim 1, wherein in step S1, a weld gap is reserved at the butt joint when the small trusses (4) are assembled on site, and the amount of arch formation in assembly is controlled.
  7. 7. The method of installing according to claim 6, wherein the assembled camber is a positive camber, and the control value is within 1/5000 of the span of the beam.
  8. 8. The installation method according to claim 1, further comprising, after said step S5, a step S6 of installing the remaining parts of the corridor on said main truss (1) forming a stable whole.
  9. 9. A method of installation according to claim 1 or 4, characterized in that the end of the wire rope (3) remote from the main truss (1) is anchored to the built body structure adjacent to the corridor.

Description

High-altitude large-span steel structure corridor installation method Technical Field The invention relates to the technical field of steel structure building construction, in particular to a method for installing a high-altitude large-span steel structure corridor. Background In modern public buildings and high-rise buildings, high-altitude large-span steel structure galleries are often designed for communicating different building bodies and enriching building functions and forms. The installation construction of the corridor is key and difficult in engineering, and has the characteristics of large span, high installation position, heavy self weight, high positioning accuracy requirement and the like, and the construction difficulty and the safety risk are very outstanding. Conventional mounting methods typically employ integral hoisting or high-altitude bulk. Integral hoisting has extremely high requirements on the capacity of hoisting equipment, is greatly limited by sites and transportation, and is often difficult to implement. The high-altitude bulk loading requires to set up a large-scale temporary supporting platform or full-hall scaffold at high altitude, so that the high-altitude bulk loading has high measure cost, long construction period, huge high-altitude operation amount, concentrated safety risk and difficult guarantee of construction quality (particularly butt joint precision and welding quality). The construction process is slightly error, and serious safety accidents such as structural instability, falling and the like are extremely easy to cause. In the prior art, a plurality of construction platform schemes aiming at the post-stage curtain wall decoration of the corridor exist, which solve the peripheral construction problem after the main body of the corridor is built, but do not relate to the fundamental problem of how to safely, efficiently and accurately install the main body structure of the corridor in place. Therefore, a method for installing a main body structure of a high-altitude long-span steel structure corridor is needed to solve the technical problems. Disclosure of Invention The invention aims to overcome the defects of the prior art and provides a high-altitude large-span steel structure corridor installation method. The method aims to solve the technical problems of high difficulty, low precision and high risk in the installation of the high-altitude large-span steel structure corridor through a systematic process of subsection prefabrication, precise hoisting, temporary stability and integral forming, and realizes safe, economical and efficient construction. In order to achieve the above purpose, the invention adopts the following technical scheme: S1, respectively processing each side of a main truss of the corridor into at least two small trusses, transporting to the site, and assembling to form the main truss to be hoisted; s2, calculating and selecting a hanging point, namely calculating the gravity center position of the main truss, and selecting connecting intersection points of web members and upper chord members at two sides of the gravity center as hanging points; S3, hoisting and positioning, namely hoisting the main truss through the hoisting points by using hoisting equipment to position the main truss on the high-altitude support; S4, a temporary stabilization step, namely, a steel wire rope is pulled on the main truss in which the first truss is located, and after the steel wire rope is regulated to be stabilized, the lifting equipment can be unhooked; And S5, integrally stabilizing, namely installing connecting members between the adjacent main trusses to form a stable integral structure, and removing the steel wire ropes. Further, in the step S3, a steel pipe sheet is arranged at the contact position of the steel wire rope at the lifting point and the edge angle of the main truss in a cushioning manner to serve as a wrap angle protection piece, so that the steel wire rope is prevented from being cut by the edge angle, and the truss coating is protected. Further, the step S3 specifically comprises the steps of controlling the lowest point of the main truss to be always higher than the set height (for example, about 1 meter) of the bracket of the support in the lifting process, and accurately locating the main truss on the support by using a chain block after the height of the support end of the main truss is basically consistent with the installation height. The method realizes fine adjustment and positioning of the high-altitude large component. Further, in the step S4, the number of the steel wire ropes is at least four, and the chain block is arranged in a matched mode and used for adjusting the tightness of the chain block, so that the spatial stability of the single truss before the whole truss is formed is ensured. Further, in the step S5, the connection member includes a horizontal support and a vertical diagonal support, and after the connection