Method for processing grouting position of hidden cave at bottom of tunnel

A technology of karst cave and grouting, which is applied in the fields of soil protection, construction, and infrastructure engineering, etc. It can solve problems affecting the stability of tunnel surrounding rock, achieve obvious reinforcement effects, high construction efficiency, and shorten the total drilling time.

Active Publication Date: 2015-05-13
SHANDONG UNIV OF SCI & TECH
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Problems solved by technology

[0010] The purpose of the present invention is to solve the above technical problems and provide a grouting treatment method for hidden karst caves at the bottom of the tunnel, aiming to solve the problem that the hidden karst caves at the bottom of the tunnel affect the stability of the surrounding rock of the tunnel

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  • Method for processing grouting position of hidden cave at bottom of tunnel
  • Method for processing grouting position of hidden cave at bottom of tunnel
  • Method for processing grouting position of hidden cave at bottom of tunnel

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Embodiment example

[0042] The above implementation case has the following advantages:

[0043] First, it is suitable for reinforcement treatment in the stress concentration area of ​​the karst cave when there is a hidden karst cave at the bottom of the tunnel. This method has clear construction sites, high construction efficiency, low engineering cost, and obvious karst cave reinforcement effect.

[0044] Second, the amount of grouting is based on theoretical calculations, and the amount used is more in line with the actual usage of the project, avoiding the waste of grouting materials caused by estimating the amount of grouting based on experience.

[0045] Third, the layout of the grouting holes is determined based on the two-dimensional stress distribution around the circular holes in the elastic plate. The layout is more scientific and reasonable, avoiding unnecessary drilling, saving the total drilling time, and indirectly speeding up construction speed.

[0046] Fourth, the diameter of th...

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Abstract

The invention relates to the technical field of tunnel engineering and discloses a method for processing a grouting position of a hidden cave at the bottom of a tunnel. The processing method includes the steps that firstly, cave detection is conducted, wherein an advance geological forecast method is comprehensively used for determining the position of the cave at the bottom of the tunnel according to the position of the bottom of the tunnel, and the position where the hidden cave is detected is marked; secondly, a second hole site is designed, the position of a grouting hole is designed based on the first step according to the two-dimensional stress distribution condition around a round hole in an elastic flat plate; thirdly, grouting is conducted, jet grouting is conducted on the stress concentrated part of the hidden cave for strengthening; fourthly, grouting is conducted, a compaction grouting technology is used for filling a hidden cave body. According to the method for processing the grouting position of the hidden cave at the bottom of the tunnel, the two-dimensional stress distribution state around the round hole in the elastic flat plate serve as the theoretical basis, the defect that construction is conducted by mainly relying on experience in the past is overcome, the stability of tunnel surrounding rock on the upper portion of the hidden cave is ensured, and the normal operation of the rear stage of the tunnel is ensured.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a grouting treatment method for hidden karst caves at the bottom of tunnels. Background technique: [0002] At present, the research on the construction of karst tunnels is deepening continuously, and the construction of tunnels in karst areas is developing vigorously. When there are hidden karst caves at the bottom of the tunnel, how to take reasonable measures to control them is a very difficult technical problem. It is related to the smooth construction and safe operation of the tunnel, and also affects the selection of the tunnel route to a certain extent. In order to bypass the hidden karst cave, the length of the route has to be increased, which indirectly increases the project cost. [0003] At present, in view of the hidden caves that may be encountered when the tunnel passes through the karst area, most experts and scholars mainly focus on the safety distance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/12E02D15/04
CPCE02D3/12E02D15/02E02D2250/003
Inventor 王清标张军贤乔培贞孙金泽吕荣山王天天白云胡忠经许垒张聪施振跃
Owner SHANDONG UNIV OF SCI & TECH
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