Support-free overhead zip line construction method of two-way single-layer cable net structure

Abstract

The invention discloses a support-free overhead zip line construction method of a two-way single-layer cable net structure. An overhead zip line manner is adopted for sequentially installing track cables and stabilization cables, middle nuts and end nuts are arranged on high-strength bolts, and cable clamps are fastened twice in the achieving process for clamping the track cables and the stabilization cables correspondingly. The method includes the steps that firstly, the track cables are straightly expanded on the ground, bottom boards and middle boards of the cable clamps are installed and fastened, and the track cables are sequentially installed at the designed positions through guide cables and traction cables to be connected with and anchored to outer pressing rings; and then the stabilization cables are straightly expanded on the ground, catwalks are laid on the installed track cables in the directions of the stabilization cables, the stabilization cables are dragged to the overhead catwalks to be expanded, top boards of the cable clamps are installed and fastened, the stabilization cables are tensioned to be connected with and anchored to the outer pressing rings, and therefore the structure is tensioned and formed. By the adoption of the method, no support or large-area work face is needed, main equipment and tools are used in a circulating manner, and the input is small; inhaul cables run overhead, and protection is easy; and construction is easy and convenient, efficiency is high, the measure cost is low, and a construction period is short.

Description

technical field [0001] The invention relates to a cable construction method for a two-way single-layer cable net structure in civil engineering. It belongs to the technical field of space cable structures. Background technique [0002] The two-way single-layer cable net structure belongs to the tension structure system, which is generally composed of two-way load-bearing cables, stabilizing cables and external pressure rings on the outer edge. The prestress must be established by tensioning the cables, so that the cable network can generate the necessary structural rigidity and form a stable load-bearing structure. Inside the cable net, the load-bearing cables and the stabilizing cables are connected by cable clips; at the edge of the cable net, the cable head at the end of the cable is connected with the outer pressure ring. In order to clamp two-way cables, the cable clamp is generally composed of a bottom plate, a middle plate, a top plate and high-strength bolt pairs, ...

AI Technical Summary

Problems solved by technology

The construction of the full hall support method requires a large number of high supports to be erected on the ground in the site. Although the network working surface is good and the technical requirements are low, the construction measures are expensive and the construction period is long. The ground in the site has been occupied for a long time. Cable Protection Measures

The construction of the overall traction lifting method requires the overall lifting of the cable net assembled on the ground to the high-altitude design position. Although the construction with few or no supports can be realized, the technical requirements are high, and the investment in traction and lifting equipment and tooling is large. If the terrain If the conditions are complex, it is necessary to set up low-altitude supports on the ground to form a better networking working surface, and take cable protection measures within the entire working surface

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