Pre-supporting technology used in tunnel engineering construction

A technology of tunnel engineering and pre-support, which is applied in tunnels, mining equipment, earthwork drilling and mining, etc., can solve the problems of slow construction progress, high cost, and long support period, and achieve improved safety, light weight, and reinforced rock mass The effect of intensity

Inactive Publication Date: 2017-01-25
TIBET HUATAILONG MINING DEV
View PDF1 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, advanced small conduit support has been widely used in the support of broken and weak rock masses. However, in the actual construct...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This embodiment proposes a pre-supporting process for tunnel engineering construction. The pre-supporting process is a construction process in which cementitious materials are injected into the fragile and weak rock mass through an advanced conduit before excavation to make it stable. Specifically The steps are summarized as follows:

[0020] (1) Before excavation of fragile and weak rock mass, seal the construction face with concrete;

[0021] (2) Asphalt is selected as the cementing material, and the cementing material is injected into the rock mass through the advanced conduit. After the cementing material is injected, it diffuses into a gelling diffusion circle to form a stable rock mass.

Embodiment 2

[0023] This embodiment proposes a pre-supporting process for tunnel engineering construction. The pre-supporting process is a construction process in which cementitious materials are injected into the fragile and weak rock mass through an advanced conduit before excavation to make it stable. Specifically The steps are summarized as follows:

[0024] (1) Before excavation of fragile and weak rock mass, seal the construction face with concrete;

[0025] (2) Select the mixture of asphalt and slurry as the cementitious material. The mass ratio of slurry to asphalt is 1:1. The cementitious material is injected into the rock mass through the advanced conduit. After injection, the cementitious material diffuses into gelled diffusion Circle, forming a stable rock mass.

Embodiment 3

[0027] This embodiment proposes a pre-supporting process for tunnel engineering construction. The pre-supporting process is a construction process in which cementitious materials are injected into the fragile and weak rock mass through an advanced conduit before excavation to make it stable. Specifically The steps are summarized as follows:

[0028] (1) Before excavation of fragile and weak rock mass, seal the construction face with concrete;

[0029] (2) Use ultrasound to detect the rock mass, know the degree of rock mass fragmentation, and calculate the amount of cementitious material to be injected;

[0030] (3) Select the mixture of asphalt and slurry as the cementitious material, the mass ratio of slurry to asphalt is 1:5, calculate the known injection quantity according to step (2), and inject the cementitious material into the rock mass through the advanced conduit , the cementitious material diffuses into a gelled diffusion circle after injection, forming a stable roc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a pre-supporting technology used in tunnel engineering construction. The pre-supporting technology comprises the steps of infusing binding materials into fragile flabby rocks through an advancing duct before the fragile flabby rock mass are excavated, and stabilizing the fragile flabby rocks. The binding materials comprise one of pitch and slurry or a mixture of the pitch and the slurry. The pre-supporting technology is aimed at overcoming the shortcomings of current supporting, and particularly, for fragile flabby rocks containing water, the weight of the rock mass can be increased because of the large infusion amount of the slurry in a current supporting technology, which can in turn bring potential safety hazard to the supporting of the steel frames. And if the infusing amount of the slurry is not enough, the rock mass strength will be lowered. To balance the situation, the pre-supporting technology used in tunnel engineering construction adopts a kind of pitch with high coagulability and light mass as the binding materials, wherein the pitch can be used independently or used through mixing with the slurry; meanwhile, the pitch can improve the rock mass strength and reduce cost.

Description

technical field [0001] The invention relates to a pre-support technology for tunnel engineering construction, in particular to an advanced pre-support technology for tunnels used in fragile and fragile rock mass, and belongs to the technical field of tunnel construction. Background technique [0002] The advanced small conduit is used in the excavation and construction of tunnel engineering, and is mainly used for the pre-support of the weak broken zone, shallow buried section, tunnel entrance bias section, sand layer section, sand pebble section, fault fracture zone and other sections during the self-stabilization period. In the construction of weak and broken rock strata, the advanced small conduit can reinforce the loose rock stratum, and the stability of the loose and weak surrounding rock is enhanced after grouting, which is conducive to the stability of the surrounding rock after the completion of excavation and the completion of the initial support period. Stable, so ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): E21D9/00
CPCE21D9/001E21D9/002
Inventor 曾平
Owner TIBET HUATAILONG MINING DEV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap