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Strengthening method for water-rich glacial drift layer tunnel base

A technology for enriching water and tunnels, which is applied in tunnels, tunnel linings, and earth-moving drilling and mining, etc., can solve the problems of unsatisfactory drainage design, rapid drainage of rainwater, damage, etc. The effect of carrying capacity

Inactive Publication Date: 2020-07-31
SOUTHWEST JIAOTONG UNIV +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the drainage design of the tunnel bottom structure in plateau areas does not meet the requirements, the rainwater cannot be quickly discharged during the rainy season, coupled with the construction technology and quality problems of the tunnel base, and the daily maintenance and repairs are not timely, resulting in cracks, damage and damage to the tunnel base. Phenomena such as churn and mud will affect the normal operation of the train

Method used

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  • Strengthening method for water-rich glacial drift layer tunnel base
  • Strengthening method for water-rich glacial drift layer tunnel base
  • Strengthening method for water-rich glacial drift layer tunnel base

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0037] see figure 1 , the application provides a method for reinforcing a tunnel base in a water-rich moraine layer, comprising the following steps:

[0038] S100: Drill holes at preset positions of the water-rich moraine section.

[0039] see figure 2 and image 3 , During construction, drill holes with a depth of 5-7m in the position below the invert arch 1 of the water-rich moraine layer. In the specific implementation, the drilling rod 2 is used for drilling construction.

[0040] S200: Install the ultrasonic vibration device 3 into the hole. In the specific selection, the parameters of the ultrasonic vibration device 3 are as follows: the size is 18mm×85mm, the resolution is 0.13mm, the voltage is 0-10V, the output is 4ma-20ma, and the vibration frequency it can provide is 25KHz.

[0041] see Figure 4 , During installation, the ultrasonic vibration device 3 is installed on the wall of the drilled hole.

[0042] S300: inject fast-setting cement slurry into the hol...

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Abstract

The invention provides a strengthening method for a water-rich glacial drift layer tunnel base and belongs to the field of tunnel engineering. By means of the strengthening method for the water-rich glacial drift layer tunnel base, the bearing force of the tunnel base can be improved, and meanwhile accumulation of water below the base can also be effectively avoided. Different from stirring vibration of transmission, the noise influences of an ultrasonic vibration device on constructors are little; and compared with a traditional vibration manner, the method better facilitates the reaction andgrowth of microorganisms, and the strengthening effect of the water-rich glacial drift layer base is further improved.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a method for reinforcing a tunnel base in a water-rich moraine layer. Background technique [0002] The moraine layer refers to the special stratum formed by the sediment and rock fragments carried and transported in the process of glaciation, and left in place and deposited after the glacier recedes. It is also called the glacier sedimentary layer. , The gravel is mostly angular, sub-angular, and a few are rounded. Mixed particle size, lack of sorting, lenses composed of gravel, sand or clay, often a mixture of huge stones and fine muddy materials, with very different particle sizes. Its color mostly depends on the composition of the parent rock. The widely distributed ones are mostly brown with brown, red and gray spots, and the composition is also related to the depositional environment. The surrounding rock is rich in water, and the self-stabilizing ability is poor after e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/00E21D11/10
CPCE21D11/00E21D11/105
Inventor 刘大刚王明年王勇郑宗溪胡云鹏王岩刘金松强新刚胖涛曹彧张维
Owner SOUTHWEST JIAOTONG UNIV
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