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

A two-unit six-step construction method for shallow-buried long-span tunnels

A construction method and tunnel technology, which are used in tunnels, tunnel linings, and earth-moving drilling and mining, etc., to achieve the effects of high work efficiency, strong popularization, and ensuring construction safety.

Active Publication Date: 2019-07-12
CHINA RAILWAY 12TH BUREAU GRP +1
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The present invention provides a shallow-buried long-span tunnel in order to solve the problem of the lack of a construction method with a simple process and a certain separation and support function in the tunnel construction in the existing soft soil layer tunnel construction in the saturated water area. Two-unit six-step construction method

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 two-unit six-step construction method for shallow-buried long-span tunnels
  • A two-unit six-step construction method for shallow-buried long-span tunnels
  • A two-unit six-step construction method for shallow-buried long-span tunnels

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] Example: The Meilin Tunnel of the Xiamen-Shenzhen Railway is a control project along the entire line. The mileage DK499+100~DK499+170 section passes through the Shuijing Reservoir. The buried depth of this section is 11m. The geological conditions from top to bottom are: silty clay, fully weathered granite , strongly weathered granite, the arch is made of silty clay, and the bottom of the tunnel is made of strongly weathered granite, which is one of the safety risk points in the construction of Meilin Tunnel. Before the excavation of the tunnel, a large pipe shed was used to split and grout to form a fan-shaped protective water blocking circle to prevent the seepage of the reservoir water and endanger the safety of the tunnel structure; according to the characteristics of geological conditions, the two-unit excavation method was adopted, that is, the excavation surface was divided into two Two units, the upper unit I and the lower unit II, use the middle partition 3 and ...

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 relates to the technical field of tunnel construction, in particular to a two-unit and six-step construction method for a shallow-buried large-span tunnel. The two-unit and six-step construction method solves the problem that a construction method which is simple in technology, can achieve the effects of isolation and supporting in the tunnel construction process is lacked in existing soft soil tunnel construction in a water-saturated area. The two-unit and six-step construction method includes the steps of excavating an upper bench of an upper unit and constructing preliminary supporting; excavating an lower bench of the upper unit and constructing preliminary supporting; mounting a cross beam at the separation position of an upper unit body and a lower unit body and constructing a concrete center septum; mounting a support arching on the center septum; excavating an upper bench of an lower unit and constructing preliminary supporting; and excavating and constructing an inverted arch and filling of the inverted arch, and completing enclosing of a tunnel face and forming a ring. By adoption of the two-unit and six-step construction method, water stored in a reservoir is effectively prevented from seepage, not only is the surrounding environment of the reservoir is protected, but also the construction safety is ensured, special equipment is not needed to be invested in construction, the construction quality meets the structural requirements, and the construction method is convenient to operate, and has strong generalization performance.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a two-unit six-step construction method for a shallow-buried large-span tunnel. Background technique [0002] It is inevitable to encounter tunnels of various landform types in railway engineering, among which the difficulty of construction is most prominent for large-section tunnels in weak strata. With the progress of society and the continuous updating of construction technology, the construction methods used in large-section tunnels include the method of reserving core soil in arc-shaped pilot pits, CD method, CRD method, single-side pilot-pit method, and double-side-wall pilot pit method. , Three-step seven-step excavation method and other mature techniques. [0003] When the tunnel inevitably needs to pass through underground projects such as reservoirs with rich water sources and poor geological conditions, the construction safety risks are high, and large def...

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): E21D11/18E21D11/10
CPCE21D11/10E21D11/18
Inventor 孙志敏王建平刘勇斌唐春宇吴勇王东里李五红赵香萍李晓
Owner CHINA RAILWAY 12TH 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