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Micro-disturbance foundation reinforcement device and underground tunnel envelope structure construction method

A technology for foundation reinforcement and underground tunnels, which is applied in basic structure engineering, soil protection, sheet pile walls, etc., can solve the problems of inconvenient construction, inconvenience and low efficiency.

Active Publication Date: 2020-06-09
浙江吉通地空建筑科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The cement-soil mixing pile formed by the mixing pile machine in the current perturbation mixing pile construction method is cylindrical, and its outer diameter is consistent from top to bottom. It is impossible to adjust the outer diameter of the cement-soil mixing pile during construction. The ladder-like cement-soil mixing pile with a large bottom and a small top cannot meet some special foundation reinforcement construction needs. For example, it is inconvenient to use the current perturbation pile machine for the enclosure of underground tunnels. It not only needs to construct underground The side retaining walls on the left and right sides of the tunnel, and the lower retaining wall under the underground tunnel are also constructed. The gas construction operation is inconvenient, the construction steps are complicated, and the efficiency is low.

Method used

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  • Micro-disturbance foundation reinforcement device and underground tunnel envelope structure construction method
  • Micro-disturbance foundation reinforcement device and underground tunnel envelope structure construction method
  • Micro-disturbance foundation reinforcement device and underground tunnel envelope structure construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Embodiment one: if figure 1 , figure 2 As shown, a micro-disturbance foundation reinforcement device includes a stirring pile driver, a high-pressure grouting system and a low-pressure grouting system. The stirring pile driver includes a drill pipe 1 . The lower end of the drill rod is provided with a drill bit 2. In the present embodiment, the drill bit includes a triangular knife rest 2.1 and a plurality of cutter teeth 2.2 arranged on the knife rest. The bottom of the drill pipe is also provided with two stirring paddles 3, and in this embodiment, the stirring paddles extend radially along the drill pipe. The high-pressure grouting system 4 includes a high-pressure grouting passage 4.1 arranged in the drill pipe and a high-pressure injection passage 4.2 arranged in one of the stirring paddles. In this embodiment, the high-pressure grouting passage extends along the axial direction of the drill pipe, and The top of the drill pipe forms a high-pressure grouting po...

Embodiment 2

[0046] Embodiment two, such as image 3 As shown, a micro-disturbance foundation reinforcement device also includes an underground barrier-breaking device 7 . The underground barrier breaking device includes a pressure injection channel 7.1 arranged in the drill pipe, a support column 7.2 formed by extending downward from the lower end of the drill pipe, a vertical cavity 7.3 arranged in the support column, a The upper, middle and lower pistons, the connecting rod connecting the upper piston 7.4 and the middle piston 7.5, the connecting rod connecting the middle piston and the lower piston 7.6, the limit block 7.7 arranged on the inner side of the supporting cylinder and the connecting rod arranged in the supporting cylinder. 2 detonators 7.8. In this embodiment, the pressure injection channel extends along the axial direction of the drill pipe, and a pressure injection port is formed on the top of the drill pipe. The underground barrier breaking device also includes a pressu...

Embodiment 3

[0050] Embodiment three, such as Figure 4 As shown, a method for constructing an underground tunnel enclosure structure using a micro-disturbance foundation reinforcement device. For the specific structure of the micro-disturbance foundation reinforcement device in this embodiment, refer to Embodiment 1 or Embodiment 2. The underground tunnel in this embodiment refers to various underground tunnels, such as subway tunnels or pipe galleries.

[0051] Such as Figure 4As shown, a method for constructing an underground tunnel enclosure structure using a micro-disturbance foundation reinforcement device includes the following steps in turn: construct tunnel enclosure walls 10 on the left and right sides of the underground tunnel 8, and the tunnel enclosure walls consist of several tunnel enclosures along the underground tunnel. The cement-soil piles 9 distributed sequentially in the length direction are formed. The construction of the tunnel retaining wall includes the followin...

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Abstract

The invention discloses a micro-disturbance foundation reinforcement device and an underground tunnel envelope structure construction method, and aims to provide the micro-disturbance foundation reinforcement device and the underground tunnel enclosure structure construction method which can adjust the outer diameter of the same cement soil mixing pile according to the needs, and form a step-shaped cement soil mixing pile through construction, so as to meet different construction needs. The micro-disturbance foundation reinforcement device comprises a mixing pile machine, a high-pressure grouting system and a low-pressure grouting system; the mixing pile machine comprises a drill pipe, the lower end of the drill pipe is provided with a drill bit, and the bottom of the drill pipe is furtherprovided with at least two mixing paddles; the high-pressure grouting system comprises a high-pressure grouting channel which is arranged in the drill pipe and a high-pressure jet channel which is arranged in one of the mixing paddles; and the low-pressure grouting system comprises a low-pressure grouting system which is arranged in the drill pipe and a low-pressure grouting channel which is arranged at the bottom of the drill pipe.

Description

technical field [0001] The invention relates to underground enclosure construction equipment and a construction method, in particular to a micro-disturbance foundation reinforcement device and an underground tunnel enclosure structure construction method. Background technique [0002] The construction method of perturbation mixing pile has excellent construction quality and workability, and has been adopted by many construction sites. The construction method of the perturbation mixing pile generally uses cement as the curing agent, and the cement-soil slurry is sprayed into the soil by the mixing pile machine and fully stirred to form a construction method of the cement-soil mixing pile. The cement-soil mixing pile formed by the mixing pile machine in the current perturbation mixing pile construction method is cylindrical, and its outer diameter is consistent from top to bottom, and the outer diameter of the cement-soil mixing pile cannot be adjusted as required during const...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/46E02D3/12
CPCE02D3/126E02D5/46
Inventor 江正兵李新伟江海林沈棒棒胡黎
Owner 浙江吉通地空建筑科技有限公司
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