Determination method of safe vertical distance between shield and cave in sandy karst formation
A technology of vertical distance and determination method, which is applied in earth-moving drilling, wellbore/well components, design optimization/simulation, etc. It can solve the problems of low efficiency, poor operability, and it is not easy for field engineers to judge quickly and intuitively, and achieve the expression Simple and clear, convenient construction and operation, strong operability effect
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[0054] 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.
[0055] A method for determining the safe vertical distance between a shield tunnel and a karst cave in an overlying sandy karst underlying carbonaceous limestone formation. Specifically as follows:
[0056] A rail transit project is located in Guangzhou, and complex strata will appear on the face of the tunnel during the excavation of the shield construction section. The landform belongs to the alluvial and alluvial plain of the river, and the terrain is flat and wide, revealing that the Quaterna...
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