Construction method for laterally crossing bridge piles by intersected porous subway tunnels

Abstract

The invention discloses a construction method for laterally crossing bridge piles by intersected porous subway tunnels. The construction method comprises the following steps of arranging multiple lines in an intersecting manner according to line planning, intersecting one line again, and forming a triangular manner through any three in the multiple tunnels in the multiple lines; before laterally crossing the bridge piles on the tunnel side, isolating and reinforcing G-series high-speed train bridge piles; and performing shield crossing construction, constructing the tunnels in sequence from bottom to top, performing grouting reinforcing on the intersecting segments of the tunnels, and before upper tunnels are constructed, reinforcing lower tunnels. Through the construction method, the multiple bridge pile crossing lines are arranged in the intersecting manner, the need for reasonable space between the tunnels and the bridge piles can be met, and needs of tunnel stress and G-series high-speed train bridge safety can be met.

Description

technical field [0001] The disclosure belongs to the technical field of rail transit engineering construction, and in particular relates to a construction method for side bridge piles of stacked porous subway tunnels. Background technique [0002] In the design of urban rail transit tunnels, it is inevitable to pass through various types of bridge pile foundations. Most side tunnels are designed to pass through adjacent bridge holes with a single hole. When the bridge span is large, the left and right lines pass through the same bridge hole. If it is small or due to line layout factors, it is difficult to lay out the left and right tunnels parallel to the same bridge hole, the upper and lower superimposed layouts are laid, and the lower tunnel is constructed first and then the upper tunnel is constructed. When the upper tunnel is constructed, the lower tunnel is rigidly supported and reinforced. Determine the installation, inversion method, and removal plan of the reinforcem...

AI Technical Summary

Problems solved by technology

[0003] In the design scheme of the section tunnel for parallel transfer, four tunnels are drawn from the section of the station at the same elevation. The impact of the bridge, four tunnels pass through the same bridge cavity at the same time, and it is difficult to lay out four tunnels in parallel under the condition of a certain distance between the spans of the bridge. The construction is difficult and risky, and the tunnel construction has a greater impact on the bridge piles, and the tunnel construction has a greater potential safety hazard for the safety of the high-speed rail bridge

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