Extra-large-span saddle-shaped flexible network cable tensioning forming construction method

Abstract

The invention provides an extra-large-span saddle-shaped flexible network cable tensioning forming construction method. A step-by-step lifting overall tensioning method is provided to carry out construction, blanking is carried out on hanging cables and annular cables according to the set length, the hanging cables and the annular cables are assembled on the ground, the hanging cables are selected as tensioning cables, the hanging cables are hoisted in batches in a subsection mode, finally the hanging cables are tensioned and mounted in place, and the whole network cable structure is tensioned and formed. The method solves the problem that construction difficulty is large due to annular cable tensioning, and saves the number of construction personnel and mechanical consumption, due to the fact that the dynamic and continuous construction process is divided into construction periods and each hoisting period is statically controllable, construction quality detection is facilitated better, the whole set of brand-new extra-large-span saddle-shaped flexible network structure construction technology is formed, the construction method is small in high-attitude work quantity, the high-attitude work quantity is reduced by more than 60 percent relative to a traditional tensioning hoisting process, a supporting tower and other auxiliary facilities are removed, the construction period is shortened by 50 percent, and the method can be widely applied to flexible network structure construction.

Description

technical field [0001] The invention relates to a construction method of a prestressed space structure, in particular to a construction method of a cable net structure. Background technique [0002] With the development of society and the advancement of science and technology, people continue to put forward new requirements for large-span space structures, which makes people have to create new structural forms to meet this need, which has the characteristics of low cost, reasonable force, and light weight. Spatial structures are created accordingly. Space structures can be divided into rigid space structures and flexible space structures according to their stiffness differences. Rigid space structures mainly include reticulated shell structures, three-dimensional truss structures, and folded plate structures. This structure itself has good rigidity, and the shape of the structure is formed by its own rigidity. Flexible space structures mainly include suspension cable str...

AI Technical Summary

Problems solved by technology

[0004] The tensioning process is the core of the construction of the super-large-span saddle-shaped flexible cable-net structure. In the construction of the traditional super-long-span flexible cable-net structure, it is necessary to set up a full house of temporary supports to the elevation of the slings, deploy the slings on the temporary supports, and pull the sling head After being connected with the lug plate of the sling, it is re-tensioned. This method has a long construction period and requires the installation of a large number of scaffolds, which wastes manpower, material resources and costs. The efficiency is not high, and there is no corresponding complete, safe and efficient method suitable for super large Construction method of saddle-shaped flexible cable-net structure

Images