Method for constructing deep-large foundation pit over operating tunnel an ddeformation-preventing strucutre

Abstract

A method about deep and big hole construction above conveyance tunnel and the structure distorting prevention, the deep and big hole used for the underground engineering construction above the conveyance tunnel zone. The method includes the following step: 1) establish at least one line of anti-pull stake in two side of soil of conveyance tunnel in the construction areas; 2)Beginning above that conveyance tunnel; 3) dig the soil to meet the anti-pull stakes, place or sprinkle to build the structure scaleboard between the row of anti-pull stakes, the valid conjunction of the structure scaleboard and anti-pull stake. This construction method and structure used to defends transforming, keeping the surroundings soils from return to play transforming and the tunnel transform caused by the load which caused by digging the soil above the tunnel availability, guaranteed the safety of tunnel conveyance without a break.

Description

technical field [0001] The invention relates to a construction method of a deep and large foundation pit above an operating tunnel and an anti-deformation structure, for example, a construction method for constructing a deep and large foundation pit above an operating subway tunnel while ensuring the safety of the tunnel. Background technique [0002] The development of urban construction has led to the construction of underground space. At present, underground spaces for various purposes have been developed and utilized in major cities around the world, such as underground parking lots, underground commercial streets, underground warehouses, underground civil defense fortifications, and cross-river tunnels. The number and scale of underground engineering construction projects have increased rapidly in cut-and-cut sections, urban overpasses and other various underground municipal public facilities; at the same time, since the beginning of the 21st century, rail transit has I...

AI Technical Summary

Problems solved by technology

[0004] Since the subway tunnels that have been built and are in operation have extremely strict requirements on deformation, and the current engineering circles are not forward-looking and systematic about how to effectively control the deformation of operating tunnels, the engineering measures are therefore lack of pertinence, and it is difficult to control the deformation of tunnels. Within the scope limited by the above-mentioned relevant regulations, such projects must often be carried out before the operation of the tunnel, and it is almost difficult to carry out such construction after the operation of the tunnel to build urban interchanges and other various underground municipal public facilities

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