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Precast pile reinforcing structure of tunnel and construction method of precast pile reinforcing structure

A technology for strengthening structures and prefabricated piles, which is applied in basic structure engineering, excavation, sheet pile walls, etc., can solve problems such as potential safety hazards, changing the stress of the structure, and destroying the tunnel structure, so as to reduce the difficulty of construction and ensure the bearing capacity of the pile body. force, the effect of reducing the workload

Active Publication Date: 2022-05-13
CHINA RAILWAY ENG CONSULTING GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, there are some tunnels under the existing airport runway in our country. Since the operation of the existing airport runway must not be interrupted, and because the tunnel serves the passenger flow of the airport, the buried depth is relatively shallow. The tunnel structure is too close, and the tunnel structure will be damaged if the construction process is a little careless, and the reaction force at the pile end will be transmitted to the tunnel structure, which will change the structural force and cause potential safety hazards. Therefore, the traditional pile foundation treatment scheme is difficult to apply here

Method used

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  • Precast pile reinforcing structure of tunnel and construction method of precast pile reinforcing structure
  • Precast pile reinforcing structure of tunnel and construction method of precast pile reinforcing structure
  • Precast pile reinforcing structure of tunnel and construction method of precast pile reinforcing structure

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Such as figure 1 As shown, this embodiment provides a prefabricated pile reinforcement method for tunnels, including:

[0028] Determine the pre-embedded depth of the prefabricated pile 1 according to the construction plan, determine the number of layers of the layered backfill soil layer 2 of the tunnel cut foundation pit, the thickness of each layer of the layered backfill soil layer 2 of the tunnel cut foundation pit, and the edge of the tunnel cut foundation pit The grading angle of the slope is used to carry out the excavation of the tunnel foundation pit;

[0029] The prefabricated pile 1 is prefabricated in the factory, and the prefabricated pile 1 is fixedly arranged on the side slope of the foundation pit in sections, and the excavated foundation pit of the tunnel is backfilled with the soil layer 2 to the grout outlet of the prefabricated pile 1, Connecting the prefabricated piles 1 of the two adjacent sections, and grouting the prefabricated piles 1 of the t...

Embodiment 2

[0033] Such as figure 1 and figure 2 As shown, this embodiment provides a prefabricated pile reinforcement method for tunnels, including:

[0034] Determine the pre-embedded depth of the prefabricated pile 1 according to the construction plan, determine the number of layers of the layered backfill soil layer 2 of the tunnel cut foundation pit, the thickness of each layer of the layered backfill soil layer 2 of the tunnel cut foundation pit, and the edge of the tunnel cut foundation pit The grading angle of the slope is used to carry out the excavation of the tunnel foundation pit;

[0035] The prefabricated pile 1 is prefabricated in the factory, and the prefabricated pile 1 is fixedly arranged on the side slope of the foundation pit in sections, and the excavated foundation pit of the tunnel is backfilled with the soil layer 2 to the grout outlet of the prefabricated pile 1, Connecting the prefabricated piles 1 of the two adjacent sections, and grouting the prefabricated p...

Embodiment 3

[0040] Such as figure 1 As shown, this embodiment provides a prefabricated pile reinforcement method for tunnels, including:

[0041] Determine the pre-embedded depth of the prefabricated pile 1 according to the construction plan, determine the number of layers of the layered backfill soil layer 2 of the tunnel cut foundation pit, the thickness of each layer of the layered backfill soil layer 2 of the tunnel cut foundation pit, and the edge of the tunnel cut foundation pit The grading angle of the slope is used to carry out the excavation of the tunnel foundation pit;

[0042] The prefabricated pile 1 is prefabricated in the factory, and the prefabricated pile 1 is fixedly arranged on the side slope of the foundation pit in sections, and the excavated foundation pit of the tunnel is backfilled with the soil layer 2 to the grout outlet of the prefabricated pile 1, Connecting the prefabricated piles 1 of the two adjacent sections, and grouting the prefabricated piles 1 of the t...

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Abstract

The invention relates to the technical field of rail transit, in particular to a precast pile reinforcing structure of a tunnel and a construction method of the precast pile reinforcing structure. The reinforcing structure comprises foundation pit side slopes, precast piles and a concrete cushion layer. The foundation pit side slopes are arranged on the two sides of the tunnel. The multiple prefabricated piles are arranged on the two sides of the tunnel, the multiple prefabricated piles are arranged on the net hanging guniting protective face, and the prefabricated piles are perpendicular to the net hanging guniting protective face. And the concrete cushion layer is arranged above the precast piles. By reinforcing the tunnel and the surrounding soil, differential deformation of the soil on the inner side and the outer side of the open cut foundation pit of the tunnel is eliminated, the influence of the pile end on the tunnel structure is avoided, and then the purpose of settlement control over the newly-built airport runway above the tunnel is achieved.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a prefabricated pile reinforcement structure of a tunnel and a construction method thereof. Background technique [0002] At present, there are some tunnels under the existing airport runway in our country. Since the operation of the existing airport runway must not be interrupted, and because the tunnel serves the passenger flow of the airport, the buried depth is relatively shallow. The tunnel structure is too close, and the tunnel structure will be damaged if the construction process is a little careless, and the reaction force at the pile end will be transmitted to the tunnel structure, which will change the structural force, and there are potential safety hazards. Therefore, the traditional pile foundation treatment scheme is difficult to apply here. Therefore, there is a need for a pile foundation treatment method that does not affect the safety of the tunnel und...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D17/20E02D5/24E02D5/52
CPCE02D17/207E02D5/24E02D5/526
Inventor 彭斌蒋小锐罗敏吕刚楚航刘建友陈丹王杨黄杰邬泽胡晶魏盼
Owner CHINA RAILWAY ENG CONSULTING GRP CO LTD
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