Shield construction method for subway underneath passing high-speed rail line

Abstract

The invention discloses a shield construction method for a subway underneath passing high-speed rail line, which comprises the following steps: after a shield tunneling machine is adopted to perform tunneling in a rock-soil layer to reach a first preset distance away from the high-speed rail line, the shield tunneling machine continues to perform tunneling to excavate a tunnel, and segments are mounted in the tunnel to form an annular lining; grouting is synchronously conducted between the constructed annular lining and the rock-soil layer; and after the shield tunneling machine conducts tunneling through the high-speed rail line and exceeds the second preset distance of the high-speed rail line, a conventional method is adopted for continuing to conduct tunneling. The method has the advantages of capability of reducing settlement during construction and after construction, high safety, simplicity and convenience in construction, easiness in operation, popularization and implementation and the like.

Description

technical field [0001] The invention relates to the technical field of shield tunneling construction, in particular to a shield tunneling construction method for underground high-speed railway lines. Background technique [0002] In subway shield construction, it is often necessary to cross high-speed rail lines. When the shield machine tunnels under the high-speed rail line, it will cause soil loss and groundwater disturbance, resulting in settlement deformation and increased gravity, which in turn will cause the track of the high-speed rail line to settle 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 high-speed rail line. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the existing technology, and provide a subway underpass high-speed rail line shield that can reduce the set...

AI Technical Summary

Problems solved by technology

When the shield machine tunnels under the high-speed rail line, it will cause soil layer loss and groundwater disturbance, resulting in settlement deformation and increased gravity, which in turn will cause the track of the high-speed rail line to settle 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 high-speed rail line

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