Reinforcement structure and method of structures passing through large section tunnel group in soft soil rich in water

Abstract

The invention relates to a reinforcement structure and a method for reinforcing structures passing through large-section tunnel groups in soft soil and rich water, including the existing structures above the tunnels and the tunnel group structure of underground tunnels below them; the ends of underground tunnels on both sides of the existing structures above the tunnels There are horizontal rows of vertical ground reinforcement flexible piles. The reinforcement width of the vertical ground reinforcement flexible piles extends to a certain distance outside the tunnel excavation line; The sides and vaults are equipped with horizontal stratum reinforcement water-stop piles, and the ends are lapped with vertical stratum reinforcement flexible piles; the outer ring of the underground excavation tunnel is equipped with underground excavation advanced pipe sheds. The invention is convenient for construction in soft soil and saturated water-rich stratum, has strong water leakage resistance, is beneficial to the safe construction of underground excavation tunnels, and is also very effective in controlling the settlement and deformation of structures above the tunnels, and can ensure the normal use of the structures.

Description

technical field [0001] The invention belongs to the technical field of underground engineering construction, and in particular relates to a reinforcement structure and a method for passing through structures under a group of tunnels with rich water and large sections in soft soil. Background technique [0002] With the continuous construction of urban underground projects and the increasing development of rail transit, cross-construction forms such as overspan and underpass between new projects and existing projects are emerging. Shallow-buried large-section tunnels and tunnel groups in soft soil and water-rich strata are prone to risks such as sandblasting and water gushing, excessive ground subsidence, excessive primary support deformation, and even partial collapse, especially when there are sensitive structures on the ground , Large-diameter pipelines, when the open-cut construction conditions are not available, it is difficult to meet the deformation control requirement...

AI Technical Summary

Problems solved by technology

Shallow-buried large-section tunnels and tunnel groups in soft soil and water-rich strata are prone to risks such as sandblasting and water gushing, excessive ground subsidence, excessive primary support deformation, and even partial collapse, especially when there are sensitive structures on the ground , Large-diameter pipelines, when open-cut construction conditions are not available, it is difficult to meet the deformation control requirements by using the traditional underground excavation method, and the construction will seriously affect the structural safety and normal use functions of the structure

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