Construction method for controlling deformation of anchor piles at barrel segment of tunnel
A body and tunnel technology, which is applied in the field of construction methods for controlling deformation of anchor piles in the body of tunnels, can solve problems such as cracks on the support surface, subsidence, and concave curvature of rock mass, so as to enhance longitudinal stiffness and bearing capacity, ensure safety and The effect of tunneling efficiency
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[0053] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0054] see figure 1 , figure 2 and image 3 , the embodiment of the present invention provides a construction method for controlling deformation of anchor piles in the tunnel body, including the following steps:
[0055] In step S100, the section of the tunnel to be excavated is divided into three parts: the upper step, the middle step and the lower step, and the upper step part is excavated to a depth of M meters in the tunnel body, and the supporting steel frame 30 for initial support is arranged at intervals And lock foot anchor tube 40;
[0056] Step S200, on the basis of the upper step, excavate the middle step part to the depth of the hole body N mete...
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