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

Advanced grouting reinforcement method for water-rich sand layer suitable for subway tunnels in complex urban environment

A water-rich sand layer and urban environment technology, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., to achieve the effect of increasing the retention rate of grout, ensuring the safety of tunnel excavation, and improving the retention rate of grout

Active Publication Date: 2019-08-13
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the deficiencies of the existing grouting technology for subway tunnels passing through water-rich sand layers in complex urban environments, the present invention provides an advanced grouting reinforcement method for water-rich sand layers suitable for subway tunnels in complex urban environments

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
  • Advanced grouting reinforcement method for water-rich sand layer suitable for subway tunnels in complex urban environment
  • Advanced grouting reinforcement method for water-rich sand layer suitable for subway tunnels in complex urban environment
  • Advanced grouting reinforcement method for water-rich sand layer suitable for subway tunnels in complex urban environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0039] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof;

[0040]As introduced in the background technology, in the prior art, there are two problems in the grouting const...

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

PropertyMeasurementUnit
lengthaaaaaaaaaa
Login to View More

Abstract

The invention discloses an advanced grouting reinforcement method for a water-rich sand layer applicable to a subway tunnel in a complex urban environment, which includes carrying out grouting design for a water-rich sand layer section; and arranging monitoring points above the target grouting reinforcement area, and the monitoring points are used for monitoring Surface uplift and deformation during the grouting process; spray concrete cover on the tunnel face, make artificial grout stop wall, and design hole positions on the artificial grout stop wall; implement drilling operations and install orifice pipes; Sand gushing is artificially induced in the area to form sand voids; grouting is carried out through the orifice pipe in the segmented area of ​​the borehole design to form columnar slurry bubbles, splitting slurry veins and compacted sand layer areas. After the grouting is completed, the surface Deformation monitoring; use the surface deformation monitoring data feedback to adjust the amount of artificially induced sand gushing and designed grouting volume; after the grout solidifies, carry out drilling, artificially induced sand gushing, grouting and surface deformation monitoring in the next design section area, Finish the grouting work of all grouting holes until the grouting of the borehole is finished.

Description

technical field [0001] The invention relates to the field of tunnel construction, in particular to an advanced grouting reinforcement method for water-rich sand layers suitable for subway tunnels in complex urban environments. Background technique [0002] Due to the shallow burial depth of urban subway tunnels, they often pass through the Quaternary water-rich sand layer. Due to the remarkable characteristics of strong water-richness, loose structure, and poor bonding ability of this layer, it is very easy to induce tunnel sand collapse during tunnel excavation. Landslides and other disasters seriously threaten the safety of tunnel excavation. The control of water-rich sand layer can adopt methods such as freezing method, precipitation method and grouting. The freezing method uses artificial freezing technology to cycle and freeze the target formation to improve the performance of the formation. This method has a long treatment period and high cost. The principle of the pr...

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): E21D9/00E21D11/10
CPCE21D9/001E21D11/10
Inventor 张连震黄长鑫张庆松刘人太李志鹏韩伟伟杨文东楚云添薄纯杰
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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