Steel tube arch bridge towerless buckling three-section type double-rib folding hoisting construction method

Abstract

The invention relates to a steel tube concrete arch bridge hoisting construction method, belongs to the technical field of bridge construction, and discloses a steel tube arch bridge towerless buckling three-section type double-rib folding hoisting construction method. The method includes the following steps of 1, arch rib pre-assembly, 2, ground anchor arrangement, 3, single-floating-crane transportation, 4, single-edge segment adjustment to be close to design angles through a floating crane, 5, buckling system installation, 6, repetition of the steps 3, 4 and 5 and installation of the other section of a single-edge segment, 7, double-floating-crane transportation, and 8, folding and welding. The method improves production efficiency, accelerates construction, saves engineering cost, and guarantees arch rib installation quality.

Description

technical field [0001] The invention relates to a hoisting construction method for a steel tube concrete arch bridge, and belongs to the technical field of bridge construction. Background technique [0002] One of the most important procedures in the construction of the arch rib of a concrete-filled steel tube arch bridge is the installation of the arch rib. At present, the main installation methods at home and abroad are: cable hoisting without bracket; cable hoisting with few brackets; floating hoisting with whole arch rib or few brackets; Wait. The calculation of cable hoisting is complex and requires a lot of steel. The construction equipment includes cable crane tower, cable crane main cable, hoisting cable, traction cable, buckle cable, working cable, wind cable, traverse cable, sports car, cable saddle and anchors, etc., have high requirements for construction equipment; the construction method that needs to erect supports during the hoisting process requires good g...

AI Technical Summary

Problems solved by technology

The calculation of cable hoisting is complex and requires a lot of steel. The construction equipment includes cable crane tower, cable crane main cable, hoisting cable, traction cable, buckle cable, working cable, wind cable, traverse cable, sports car, cable saddle and anchors, etc., have high requirements for construction equipment; the construction method that needs to erect supports during the hoisting process requires good geological conditions under the bridge and high foundation bearing capacity, and the erected supports must also undergo strict calculations. The river channel is closed to navigation during the period from erection of the bracket to the removal of the bracket; the swivel device and traction device of the swivel construction are time-consuming and labor-intensive, it is difficult to determine a reasonable buckle cable force, and the structure is prone to overall instability during the swivel stage; The requirements for water navigation are relatively high, and it is difficult to accurately control the line shape of a single arch rib when it is dropped during hoisting, and there is a risk of irreparable distortion and deformation of the arch rib. There are disadvantages that the inelastic deformation is difficult to control, the construction period of the buckle-hanging tower is long, there are many nodes, and the installation quality is difficult to control

Such as the "200910036700.5" patent, this patent also uses a cable tower, the disadvantage of using a cable tower is that the calculation is complicated, more steel is required, and there are high requirements for hoisting equipment, and the construction period is relatively long

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