Shield construction method for subway underneath passing highway

Abstract

The invention discloses a subway underneath passing highway shield construction method which comprises the steps that a shield tunneling machine is adopted to conduct tunneling in a rock-soil layer until the distance between the shield tunneling machine and a highway is not smaller than 12-15 m, the posture of the shield tunneling machine is corrected in multiple times, and the posture requirement of a designed tunneling path is met when the shield tunneling machine conducts tunneling to the position 12-15 m away from the highway; starting from the position 12-15 meters away from the highway, the tunneling speed of the shield tunneling machine is controlled to be 30-50 mm / min, the thrust is controlled to be 12000-15000 KN, and the torque is controlled to be 2000-3000 KN. M; and the shield tunneling machine is tunneled to penetrate through the highway and is tunneled to a position which is not less than 12 meters away from the highway. The method has the advantages that disturbance to surrounding soil can be effectively reduced, land subsidence can be effectively controlled, safety is high, construction is easy and convenient, and operation, popularization and implementation are easy.

Description

technical field [0001] The invention relates to the technical field of shield tunneling construction, in particular to a shield tunneling construction method for a subway underpassing an expressway. Background technique [0002] In subway shield construction, it is often necessary to cross the expressway. When the shield machine tunnels under the expressway, it will cause soil layer loss and groundwater disturbance, resulting in settlement deformation and increased gravity, which will lead to the settlement of the expressway and pose a safety risk. At present, there is no construction method that can well control the track settlement for the shield construction of the subway under the expressway. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies in the prior art and provide a subway underpass that can effectively reduce the disturbance to the surrounding soil and control the ground subsidence, ha...

AI Technical Summary

Problems solved by technology

When the shield machine tunnels under the expressway, it will cause soil layer loss and groundwater disturbance, resulting in settlement deformation and increased gravity, which will lead to the settlement of the expressway and pose a safety risk

At present, there is no construction method that can well control the track settlement for the shield construction of the subway under the expressway.

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