Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A method for treating voids in face of shield tunnel construction

A technology of shield tunneling and treatment method, which is applied in tunnels, tunnel lining, earthwork drilling and mining, etc., can solve the problems of poor grouting reinforcement effect, inability to effectively treat hollow face holes, etc., so as to avoid long-term exposure and fine Combination, to achieve convenient effects

Active Publication Date: 2016-05-11
URBAN RAIL TRANSIT ENG CO LTD OF CHINA RAILWAY FIRST GRP CO LTD +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for treating face voids in shield tunnel construction, which has simple steps, reasonable design, easy operation, low input cost, and good use effect in view of the above-mentioned deficiencies in the prior art. It can effectively solve the problems existing in traditional grouting reinforcement methods such as poor grouting reinforcement effect and inability to effectively deal with holes in the tunnel face.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for treating voids in face of shield tunnel construction
  • A method for treating voids in face of shield tunnel construction
  • A method for treating voids in face of shield tunnel construction

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Such as figure 2 A method for treating tunnel face voids for shield tunnel construction is shown. The tunnel face voids to be processed are voids 1 located at the front and upper part of the cutter head 2-1 of the shield machine 2, including the following steps:

[0049] Step 1, the first grouting: the grouting system of the shield machine 2 is used, and the first grouting slurry is injected into the lower part of the cavity 1 through the soil bin of the shield machine 2; during the first grouting process, the The internal pressure of the soil silo is controlled between 1.5bar and 3.5bar.

[0050] During the first grouting, inject the first grouting slurry into the soil bin from top to bottom; after the first grouting is completed, the inner upper part of the soil bin is filled with cement mortar, and the cement The bottom height of the mortar-filled section is lower than that of the cavity 1 .

[0051] The first grouting slurry is composed of cement, bentonite, fly ...

Embodiment 2

[0090] In this example, the difference from Example 1 is that the first grouting slurry described in step 1 is uniformly composed of cement, bentonite, fly ash, sand and water in a weight ratio of 48:52:195:580:410 Formed by mixing; the second grouting slurry described in step 2 is formed by uniformly mixing cement, bentonite, fly ash, sand and water in a weight ratio of 95:78:235:580:470.

[0091] In this embodiment, the construction process of the remaining steps is the same as that of Embodiment 1.

Embodiment 3

[0093] In this example, the difference from Example 1 is that the first grouting slurry described in step 1 is uniformly composed of cement, bentonite, fly ash, sand and water in a weight ratio of 52:48:205:580:390 Formed by mixing; the second grouting slurry described in step 2 is formed by uniformly mixing cement, bentonite, fly ash, sand and water in a weight ratio of 105:72:245:580:450.

[0094] In this embodiment, the construction process of the remaining steps is the same as that of Embodiment 1.

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 tunnel face cavity processing method for shield tunnel construction. The tunnel face cavity processing method for the shield tunnel construction includes steps that 1, primary grouting, to be specific, using a grouting system to fill first cement mortar to the lower part of the cavity from the top to bottom through a soil warehouse, wherein the first grouting size is composed of cement, bentonite, coal ash, sand and water according to the weight ratio of 45-55: 45-55: 180-220: 540-660: 360-440; 2, secondary grouting, to be specific, using the grouting system to fill second cement mortar to the middle of the cavity, wherein the second cement mortar is composed of cement, bentonite, coal ash, sand and water according to the weight ratio of 90-110: 68-82: 200-280: 540-660: 420-500; 3, tertiary grouting, to be specific, using the grouting system to fill cement slurry to the upper part of the cavity. The tunnel face cavity processing method for the shield tunnel construction is simple in steps, reasonable in design, easy and convenient to operate, low in invested cost, good in use effect and capable of solving the problems of a traditional grouting strengthening method.

Description

technical field [0001] The invention belongs to the technical field of shield tunnel construction, and in particular relates to a method for treating tunnel face voids for shield tunnel construction. Background technique [0002] The shield method is a fully mechanized construction method for modern tunnel construction, and the main mechanical equipment used is the shield machine 2. Such as Picture 1-1 , Figure 1-2 As shown, during the shield tunneling process, when the shield machine 2 is used for compressed air tool change operations, due to the long-term exposure of the tunnel face, the top of the tunnel face tends to collapse in large volume and form a cavity 1 . With the tool replacement of the shield machine, the exposure time of the cavity 1 on the top of the tunnel surface is longer, and the tunnel surface is unstable. Moreover, the cavity 1 will gradually develop over time, which will lead to the subsidence of the ground and affect the surrounding area. The safe...

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
Patent Type & Authority Patents(China)
IPC IPC(8): E21D9/06E21D11/10
CPCE21D9/08E21D11/10
Inventor 杨永强王江卡许建飞王俊英杨锦田黎明张大洋
Owner URBAN RAIL TRANSIT ENG CO LTD OF CHINA RAILWAY FIRST GRP CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com