Construction method for preventing roof caving of shield in construction
A construction method and technology in construction, which are applied in the fields of foundation structure engineering, earthwork drilling, field foundation soil survey, etc. Body disturbance and ground deformation, improve the quality of axis control, overcome the effects of poor results
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[0061] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0062] This embodiment provides a construction method for preventing shield tunnels from roof-falling during construction. It is applied to a straight section of a power cable tunnel with a length of 267m, a longitudinal gradient of 0.56%, and a thickness of 11.93m of soil covering the top of the tunnel pipe section. The soil layer is a muddy silty clay layer, and the jacking force F of the shield acting on the cutter head surface is 500kN; the specific implementation steps of applying a constructi...
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