Non-stand construction method for large bridge arch rib

Abstract

The invention relates to a large-scale bridge (steel pipe concrete arch bridge) arch rib non-support construction method, which is characterized in that: the fastening tower process and hanging tower process are combined; the fastening anchor process and hanging anchor process are combined; rubber support is applied in the tower articulation (steel structure); steel twisted wire is used as the fastening-hanging tower -anti-wind rope (tower pressing cable); centralized working surfaces and steel twisted wires are adopted in the fastening-hanging process; steel pipe support are used in tower; and less fastening cables are used in the fastening-hanging process. The construction method reduces arch rib assembling places and mounting supports, accelerates the construction progress; the stayed-fastening cable construction uses the masts type tower hung by the cable to mount arch rib, reduces construction of a group of tower and anchor; by adopting less cable construction method, the invention reduces the anchor box segment positions on the tower and reduces anchor cable quantity; and by adopting one-time forming, monitoring and measuring method, the invention simplifies the arch rib mounting construction process and the cable adjusting construction engineering, increases production efficiency, accelerates construction progress and ensures arch rib mounting quality.

Description

technical field [0001] The method of the invention relates to a construction method of a large-scale bridge (concrete-filled steel tube arch bridge), in particular to a construction method for hoisting arch ribs of a large-scale bridge. Background technique [0002] Traditional steel pipe arch rib installation adopts the following technologies: [0003] (1) The buckle tower and the pendant tower are separated without support for antenna hoisting or vertical rotation combined with horizontal rotation; [0004] (2) The foundation method of the cable crane hoisting tower is designed as a complex hinge structure (steel structure); [0005] (3) The wind-resistant cable of the pendant tower and buckle tower is designed separately; [0006] (4) The fastening construction adopts a one-to-one correspondence between the buckle cable and the number of arch rib segments; [0007] (5) Before the arch ribs are closed, it is cumbersome to adjust the alignment of the arch ribs; [0008]...

AI Technical Summary

Problems solved by technology

[0007] (5) Before the arch ribs are closed, it is cumbersome to adjust the alignment of the arch ribs;

[0008] (6) The space angle design of the buckle cable is basically the same, there are many working faces for the buckle and hang, and the force of the buckle tower is complicated;

[0009] (7) The buckle cable adopts steel wire rope, and the inelastic deformation is difficult to control;

[0011] The construction method of hoisting and installing the arch rib of the concrete-filled steel tube arch bridge without support has many procedures, difficult operation, long construction period, and it is difficult to guarantee the construction quality of each procedure

The conventional construction method of buckling and hanging is complicated, the input material is large, and the cost is high, which is one of the important reasons for the high cost of arch rib installation and construction, which directly restricts the popularization and application of large steel pipe arch bridges.

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