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

Loess tunnel foundation base reinforcing structure and method based on high pressure jet grouting piles

A technology for high-pressure rotary jetting piles and loess tunnels, which is used in infrastructure engineering, tunnels, tunnel linings, etc., can solve the problems of difficult tunnel base settlement control, difficult tunnel base settlement control, and large tunnel and surface settlement. The effect of high construction efficiency, low input construction cost and low input cost

Pending Publication Date: 2020-01-10
THE NO 6 ENG CO LTD OF CHINA RAILWAY 20TH BUREAU GRP
View PDF0 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The loess stratum has geological characteristics such as porosity, vertical joint development, strong water permeability, and subsidence. During the construction of tunnel engineering, it is easy to have large settlements in the tunnel and the surface, and it is difficult to control the settlement of the tunnel base. There are relatively large construction risks. Especially when constructing loess tunnels with a soft soil layer thickness greater than 10m at the bottom of the tunnel and a daily settlement of the tunnel base greater than 50mm, it is more difficult to control the settlement of the tunnel base

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
  • Loess tunnel foundation base reinforcing structure and method based on high pressure jet grouting piles
  • Loess tunnel foundation base reinforcing structure and method based on high pressure jet grouting piles
  • Loess tunnel foundation base reinforcing structure and method based on high pressure jet grouting piles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0073] Such as figure 1 , figure 2 The loess tunnel base reinforcement structure shown includes multiple rows of high-pressure jet grouting piles 24 that reinforce the soil below the loess tunnel under construction, and multiple rows of high-pressure jet grouting piles 24 extend along the tunnel longitudinal direction of the loess tunnel being constructed. Arranged from back to front, multiple rows of high-pressure jet grouting piles 24 are evenly arranged and form the base reinforcement structure of the constructed loess tunnel; the constructed loess tunnel is a tunnel passing through the collapsible loess layer 3, and the collapsible The loess layer 3 is located above the non-collapsible loess layer 4;

[0074] combine Figure 4 , Figure 5 and Figure 7 , the tunnel support structure of the constructed loess tunnel includes the tunnel primary support structure and the tunnel secondary lining arranged inside the tunnel primary support structure, the tunnel primary suppo...

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 loess tunnel foundation base reinforcing structure and method based on high pressure jet grouting piles. The structure comprises the multiple rows of high pressure jet grouting piles for reinforcing soil on the lower portion of a tunnel, and each high pressure jet grouting pile passes through a tunnel invert structure and a collapsible loess stratum from top to bottom andthen extends into a non collapsible loess stratum. The method comprises the following steps of firstly, tunnel excavating and preliminary bracing; secondly, second lining construction; and thirdly, foundation base reinforcing. The structure is reasonable in design, easy and convenient to construct and good in use effect. The multiple rows of high pressure jet grouting piles are adopted for carrying out foundation base reinforcing on a loess tunnel, a loess tunnel foundation base can be simply and rapidly effectively reinforced, the tunnel foundation base settling volume can be effectively controlled, meanwhile, the upper surface of a secondary lining inverted arch is adjusted to the horizontal plane, a construction platform is provided for the high pressure jet grouting piles, the loess tunnel foundation base reinforcing process can be further quickened, the high pressure jet grouting piles and the tunnel invert structure are fastened and connected into a whole, and the loess tunnel foundation base reinforcing effect can be further improved.

Description

technical field [0001] The invention belongs to the technical field of loess tunnel construction, and in particular relates to a loess tunnel base reinforcement structure and method based on high-pressure rotary grouting piles. Background technique [0002] Loess refers to sediments of yellow silt transported by wind during the Quaternary period in the geological era. Loess collapsibility coefficient (also called collapsibility coefficient) is a mechanical parameter to evaluate the collapsibility of loess. Under a certain pressure, loess collapsibility coefficient refers to the ratio of the difference between the height of the soil sample before and after soaking in water and the original height of the soil sample. The collapsibility coefficient of loess is an important index to evaluate the collapsibility of loess, which can be directly measured by experiment. According to the different collapsibility coefficient of loess, loess can be divided into collapsible loess and no...

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 Applications(China)
IPC IPC(8): E21D11/10E21D11/18E02D3/12
CPCE21D11/10E21D11/107E21D11/105E21D11/18E02D3/126
Inventor 吴小波刘德兵李瑛常运超李世军王存宝张博魏军何精伟李明辉
Owner THE NO 6 ENG CO LTD OF CHINA RAILWAY 20TH BUREAU GRP
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