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

Excavation support construction method for T-shaped crossing of underground chamber

A technology for underground caverns and construction methods, which is applied in underground caverns, earthwork drilling, wellbore lining, etc. It can solve the problems of steel arch processing, installation difficulty, and long time, so as to reduce stress release and deformation of surrounding rock , Reduce the difficulty of construction, facilitate the effect of installation and implementation

Active Publication Date: 2018-05-01
POWERCHINA HUADONG ENG COPORATION LTD
View PDF5 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The "T"-shaped intersection project arranged in the unfavorable geological area without self-stability is greatly affected by groundwater, the construction span is large, the structure is complex, the stress is concentrated, the excavation is difficult, and the installation of the support structure takes a long time. It is difficult to closely combine the rock and the supporting structure to form an overall structure, and there are great construction difficulties and safety risks
If the rock pillars are reserved for excavation, due to the low strength of the surrounding rock mass, it is necessary to pour a large amount of concrete on site to form a temporary support; and most of the steel arches have different shapes, and it will be difficult to process and install the steel arches. Long problem; the effect of prestressed anchor cables in weak surrounding rock is difficult to guarantee

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
  • Excavation support construction method for T-shaped crossing of underground chamber
  • Excavation support construction method for T-shaped crossing of underground chamber
  • Excavation support construction method for T-shaped crossing of underground chamber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Such as Figure 1 ~ Figure 3 As shown, in the construction process of the "T"-shaped intersection of the underground cavern with poor geological conditions in this embodiment, the construction is carried out step by step in different areas, and it is divided into areas I, II, and III for distributed excavation.

[0023] Among them, Area I is the cross section between the construction branch tunnel 1 and the main tunnel 2, including the bell mouth gradual change section 101 at the end of the construction branch tunnel and the construction space 202 of the portal frame at the branch tunnel and the main tunnel intersection, the bell mouth The transition section 101 is regarded as zone I a; the construction space 202 of the gantry at the branch opening includes zone I b and zone I c, zone I b is the excavation area corresponding to the opening of the flare transition section 101, zone I c is the area on the edge of zone I b , which is used to increase the sectional area of ...

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 an excavation support construction method for a T-shaped crossing of an underground chamber, and aims at providing the excavation support construction method for the T-shapedcrossing of the underground chamber with the advantages of low cost, safety and reliability so as to reduce the construction difficulty and shorten the construction period. The method has the technical scheme that the excavation support construction method for the T-shaped crossing of the underground chamber is characterized by comprising the following steps of 1, excavating, supporting and constructing a crossing section of a branch chamber and a main chamber; 2, excavating and supporting a construction passage of the main chamber; and 3, excavating and supporting the main chamber. The methodprovided by the invention is applicable to water conservancy and hydropower engineering and geotechnical engineering.

Description

technical field [0001] The invention relates to a construction method for excavating and supporting a T-shaped intersection in an underground cavern. Suitable for water conservancy and hydropower engineering, geotechnical engineering. Background technique [0002] The "T"-shaped intersection project arranged in the unfavorable geological area without self-stability is greatly affected by groundwater, the construction span is large, the structure is complex, the stress is concentrated, the excavation is difficult, and the installation of the support structure takes a long time. It is difficult to closely combine the rock and the supporting structure to form an overall structure, and there are great construction difficulties and safety risks. If the rock pillars are reserved for excavation, due to the low strength of the surrounding rock mass, it is necessary to pour a large amount of concrete on site to form a temporary support; and most of the steel arches have different sh...

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): E21D11/18
CPCE21D11/18E21D11/183
Inventor 韩华超赵新波吉玉亮孟江波胡森映孟丹
Owner POWERCHINA HUADONG ENG COPORATION 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