A construction method of jacking municipal frame bridge

Abstract

The invention relates to the technical field of construction of municipal frame bridges, in particular to a construction method for jacking municipal frame bridges. The jacking municipal frame bridge structure includes a foundation pit, the first surrounding pile crown beam and a plurality of first surrounding protecting piles are arranged on both sides of the foundation pit, and the back pile is arranged at the tail of the foundation pit , the top of the back pile is provided with a back pile crown beam; the cast-in-situ frame bridge is arranged in the foundation pit, and the bottom of the frame bridge is provided with sliding parts; both sides of the frame bridge are provided with A second retaining pile crown beam and a plurality of second retaining piles. The invention applies the jacking construction method to the design and construction of the municipal frame bridge adjacent to the high-speed railway bridge, and uses the structural counterweight to solve the problem of high-speed railway bridge pile uplift caused by soil unloading during construction, and the timeliness of passing time and space is reduced due to soil exposure A longer time will affect the deformation of high-speed rail bridge piles, and effectively reduce the impact of municipal roads adjacent to high-speed rail bridge pile construction on existing railway operations.

Description

technical field [0001] The invention relates to the technical field of construction of municipal frame bridges, in particular to a construction method for jacking municipal frame bridges. Background technique [0002] Municipal road engineering is an important part of urban construction. The municipal frame bridge is a highway-rail overpass that passes under the road and is close to the railway. At present, due to the rapid development of high-speed railway construction, there are more and more bridge projects passing under the high-speed railway under the municipal road, and there will be problems with adjacent high-speed railway bridge piles during the underpassing process. In recent years, the requirements for the deformation control of high-speed rail bridges have become increasingly strict, and railway safety must be ensured during the operation period. At present, the existing technologies for municipal engineering adjacent to high-speed rail bridge piles are mainly op...

AI Technical Summary

Problems solved by technology

In recent years, the requirements for the deformation control of high-speed rail bridges have become increasingly strict, and railway safety must be ensured during the operation period. At present, the existing technologies for municipal engineering adjacent to high-speed rail bridge piles are mainly open excavation, concealed excavation, and shield construction. The cost of underground excavation and shield construction It is generally high and has strict requirements on the alignment of municipal roads. The open-cut construction method can easily cause high-speed rail bridge piles to bulge when unloading soil during foundation pit excavation. Improper construction control can easily cause the amount of uplift to exceed the limit and the smoothness of the high-speed rail track to exceed the limit , affecting driving safety

Images