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

A construction test method for improving the slag soil of shield tunneling with water-rich sand layer

A technology for soil improvement and water-rich sand layer, which is used in earth-moving drilling, mining equipment, tunnels, etc., and can solve the problem of unreasonable modifier parameters and driving parameters, poor soil improvement effect, and increased shield machine wear. and other problems, to achieve the effect of solving the phenomenon of sand gushing and water gushing, good flow plasticity and earth pressure balance, and preventing slag from forming cakes.

Active Publication Date: 2022-08-05
CHINA RAILWAY NO 9 GRP NO 7 ENG CO LTD
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention determines the best modifier parameters and tunneling parameters by carrying out trial tunneling in the test section, and solves the problem of improvement effect of dregs due to unreasonable setting of modifier parameters and tunneling parameters in the process of shield tunneling in the prior art Poor, reduce tunneling speed, increase shield machine wear

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 construction test method for improving the slag soil of shield tunneling with water-rich sand layer
  • A construction test method for improving the slag soil of shield tunneling with water-rich sand layer
  • A construction test method for improving the slag soil of shield tunneling with water-rich sand layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] Specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:

[0042] The so-called slag improvement is to inject the modifier through the modifier injection port configured in the shield machine cutter head, soil bin and screw conveyor, and use the cutter head, soil silo stirring wings or screw conveyor to rotate and stir the additive and soil slag. The main purpose of mixing is to make the slag cut by the shield have good fluidity, suitable consistency, lower water permeability and lower frictional resistance, that is, the plastic fluidization transformation of the excavated soil, so as to meet the needs of Under different geological conditions, the ideal working state can be achieved when different excavation modes are adopted.

[0043] The improved slag has better earth pressure balance effect, which is conducive to stabilizing the excavation surface and controlling the surface settlement. The slag has b...

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

A water-rich sand layer shield tunneling slag improvement construction test method includes the following steps: 1. Adding prefabricated modifiers to the shield machine cutter head, soil bin and screw conveyor respectively. 2. Determine the modifier parameters: Select the first 100m of the shield as the test section, set the same excavation parameters, and set different modifier parameters, and test the excavation in the test section. 3. Measure the parameters of the tunnel, the amount of unearthed soil and the improvement parameters of the slag after the excavation, and adjust the parameters of the modifier to determine the parameters of the modifier during the formal excavation. 4. Determine the excavation parameters: the parameters of the modifier are the same, and the shield machine will try to excavate in the test section under different excavation parameters. 5. Measure the tunnel parameters, excavation volume and slag improvement parameters after excavation and adjust the excavation parameters to determine the formal excavation parameters of the shield machine. The method solves the problem that in the prior art, due to the unreasonable setting of the modifier parameters and the tunneling parameters, the slag soil improvement effect is not good, the tunneling speed is reduced, and the wear of the shield machine is increased.

Description

technical field [0001] The invention relates to the technical field of shield tunnel construction, in particular to a construction test method for improving slag soil in shield tunneling of a water-rich sand layer. Background technique [0002] The EPB shield machine is widely used in the tunnel construction in the subway section. However, due to its own design reasons, the EPB shield machine is difficult to excavate in the full-section water-rich sand layer, with large settlement and difficult excavation. The stability of the surrounding rock and soil mass on the excavation face is not easy to maintain. [0003] Due to the poor flow plasticity of the slag in the water-rich sand layer, the large friction coefficient and the high strength, the thrust of the shield machine is greatly increased, the excavation is not easy, and the shield machine is severely worn, and the tunneling speed is reduced or even unable to advance. At present, in order to solve the above problems, the...

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): E21D9/06E21D9/08
CPCE21D9/06E21D9/0642E21D9/08
Inventor 董光王振东李振兵唐立洲张文澄王建宁窦瑞徐涛宋承亮林海龙巩姣徐乐令杰
Owner CHINA RAILWAY NO 9 GRP NO 7 ENG 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