Partition evaluation method for safety influence caused by shield tunnel construction on surrounding environments

Abstract

The invention provides a partition evaluation method for safety influence caused by shield tunnel construction on surrounding environments. The method comprises the following steps that ground surface settlement caused by tunnel construction is calculated, a united soil body moving model solution is adopted for calculating the ground surface settlement, and the influence of shield construction on the surrounding environments can take displacement (5 mm, 10 mm and 20 mm) caused by a tunnel in a corresponding area as a standard control value for dividing an influence area; evaluation is conducted on the influence of shield tunnel construction on the surrounding environments in practical engineering according to influence partition results. The influence of shield tunnel construction on the surrounding environments such as buildings and underground pipelines can be evaluated through the displacement caused by shield tunnel construction, and the application range is wide. According to the partition evaluation method for the safety influence caused by shield tunnel construction on the surrounding environments, the calculation method is simple, the influence of the soil condition on partition is considered, the application range is wide, and the method is suitable for evaluation of the safety influence caused by shield tunnel excavation on all surrounding structures including the buildings, the underground pipelines and the like.

Description

technical field [0001] The invention belongs to the technical field of underground engineering, and in particular relates to a partition assessment method for the impact of shield tunnel construction on the safety of the surrounding environment. Background technique [0002] At present, the subway projects to be built in my country generally cross the main roads of the city, and there are buildings, underground pipelines, and some existing tunnels nearby. In the process of subway construction, problems such as distortion and cracking of buildings and underground pipelines will occur. At the same time, the existing subway will also have new displacement and deformation due to the influence of the new subway. Dividing the affected area according to the degree of impact can predict the impact of shield construction on the area where structures (including buildings, underground pipelines, existing subway tunnels, etc.) are located, which has important research value. [0003] S...

AI Technical Summary

Problems solved by technology

[0006] 1) The influence of the soil conditions around the tunnel on the partition is not considered in the calculation;

[0007] 2) It is only applicable to the interaction between two adjacent tunnels during the construction of shield tunnels;

[0011] 2) In the literature using displacement as the partition criterion, its application range is narrow

Images