A method for excavating tunnels with two expansions and four expansions

A technology for tunnel and tunnel construction, applied in the direction of tunnel, tunnel lining, earth-moving drilling and mining, etc., can solve the problems of large engineering volume, weak excavation support, easy collapse, etc., and achieves fast project progress, wide terrain adaptability, Temporary support with low axial force

Active Publication Date: 2021-05-14
浙江省隧道工程集团有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the disadvantages of weak excavation and support in the prior art, easy to collapse, large engineering quantity, etc., the present invention provides a tunnel two-expansion and four-expansion excavation 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 method for excavating tunnels with two expansions and four expansions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method for tunnel expansion and excavation with two expansions and four expansions, including the construction method for tunnels in grade IV and V surrounding rocks, and the construction method for tunnels in grade III surrounding rocks, wherein the construction methods for tunnels in grades IV and V surrounding rocks include the following construction steps: excavating the tunnel Partitioning is carried out, including part I in the middle of the vault, part II on the left side of part I, part III on the right side of part I, part IV on the lower side of part II, part V under part III and part VI under part I;

[0044] Step 1. Existing tunnel backfilling, reinforcement and grouting:

[0045] Step 2, excavation and support of part I of the vault;

[0046] Step 3: Excavation and support for part II on the upper left;

[0047] Step 4. Excavation and support of Part III on the upper right;

[0048] Step 5. Excavation and support of the IV part of the lower left;

[00...

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 present invention relates to the field of tunnel excavation, in particular to a method for expanding tunnels, including the construction methods for tunnels in Class IV and V surrounding rocks, and the construction methods for tunnels in Class III surrounding rocks, wherein the construction methods for tunnels in Class IV and V surrounding rocks include The construction steps are as follows: divide the excavated tunnel, including Part I in the middle of the vault, Part II on the left side of Part I, Part III on the right side of Part I, Part IV on the lower side of Part II, and Part V on the lower part of Part III and Part VI of the lower part of I. This construction method adopts double-side wall excavation in sections, and the excavation method of the arch first and the wall later has the following advantages: the vault sinks the least, the horizontal displacement is small, the axial force of the temporary support is the smallest, and the support is reliable, and the project progress is fast . Moreover, this scheme is very suitable for the expansion and excavation construction of ultra-large-span, ultra-large-section, and small-spacing tunnels. The construction safety is high and there will be no collapse.

Description

technical field [0001] The invention relates to the field of tunnel engineering, in particular to a method for excavating a tunnel with two expansions and four expansions. Background technique [0002] A road tunnel is a channel dedicated to vehicle transport. With the development of social economy and production, a large number of expressways have appeared, and higher standards have been put forward for road construction technology, requiring straight lines, gentle slopes, and spacious road surfaces. Therefore, when the road passes through the mountainous area, the scheme of detour around the mountain in the past is mostly changed to the tunnel scheme. The construction of tunnels plays an important role in improving the technical status of highways, shortening running distances, increasing transportation capacity, and reducing accidents. [0003] With the development of society, the increase in the number of cars, and the widening of roads, the capacity of the original tu...

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): E21D11/10E21D20/00E21D9/00
CPCE21D9/006E21D11/105E21D11/107E21D20/00
Inventor 康三月项斌徐友樟郭红里陈艳春
Owner 浙江省隧道工程集团有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap