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Anchor Length Design Method Based on Displacement Difference/Gradient in Underground Engineering

A technology of underground engineering and design methods, applied in design optimization/simulation, instruments, geometric CAD, etc., can solve the problems of low support construction efficiency, achieve the effect of improving construction efficiency and reducing support costs

Active Publication Date: 2022-06-21
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims at the deficiencies in current anchor length design, and provides an anchor length design method based on displacement difference / gradient in underground engineering, so as to solve the problem of low support construction efficiency caused by relying on experience to select the anchor length in the prior art

Method used

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  • Anchor Length Design Method Based on Displacement Difference/Gradient in Underground Engineering
  • Anchor Length Design Method Based on Displacement Difference/Gradient in Underground Engineering
  • Anchor Length Design Method Based on Displacement Difference/Gradient in Underground Engineering

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Embodiment Construction

[0019] The specific embodiments of the present invention are described below to facilitate those skilled in the art to understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes Such changes are obvious within the spirit and scope of the present invention as defined and determined by the appended claims, and all inventions and creations utilizing the inventive concept are within the scope of protection.

[0020] All " / " mentioned in this scheme means or means.

[0021] refer to figure 1 , figure 1 A flow chart showing an anchor length design method based on displacement difference / gradient in underground engineering; as figure 1 As shown, the method includes steps 101 to 107 .

[0022] In step 101, the method of numerical simulation or model test is used to obtain the surrounding rock parameters of the surrounding rock in the underground...

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Abstract

The invention discloses a method for designing the length of anchor pieces based on displacement difference / gradient in underground engineering. The three-dimensional model of the project; the numerical simulation software is used to simulate the excavation of underground engineering, and the displacement of a certain point of any surrounding rock depth and the displacement of a certain point of the surrounding rock on the same radial direction under any surrounding rock depth after different active support forces are applied; Calculation Displacement difference / displacement gradient at any depth of surrounding rock; draw the displacement difference or displacement gradient change curve of the surrounding rock under the same active support force; select each displacement difference / displacement gradient change curve in which the displacement difference / displacement gradient is less than and infinitely close to The surrounding rock depth of the ultimate elongation of the anchor / ultimate elongation is taken as the length of the anchor; among all the lengths of the anchor, the length of the anchor that satisfies the principle of minimum cost is selected as the design length of the anchor.

Description

technical field [0001] The invention relates to an anchoring structure in underground engineering, in particular to a method for designing the length of anchors based on displacement difference / gradient in underground engineering. Background technique [0002] The traditional anchoring design method in underground engineering comes from the design reference in the code, and the length of the anchor rod (cable) in the relevant code is mostly based on engineering experience, and there is no clear test method or calculation formula. cable) length determination lacks effective design guidance. In fact, in the process of tunnel construction, one of the most critical factors to characterize the construction efficiency of bolt (cable) support is the drilling time. The drilling time and the drilling depth are not simply proportional to each other. The drilling time of the bolt (cable) has a specific sensitive section to the drilling depth. Within the hole depth of 5m, the drilling ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/13G06F30/20G06F119/14
Inventor 汪波蔡树垚李杰喻炜金辉
Owner SOUTHWEST JIAOTONG UNIV
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