Squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and construction technology

A prestressed anchor cable and weak surrounding rock technology, which is applied in the installation of anchor bolts, mining equipment, earthwork drilling and mining, etc., can solve the problems of delay in the construction period of reinforcing anchor cables, lack of systematic layout, etc., and reduce the risk of surrounding rock collapse risk, improving the internal force of surrounding rock, reducing the growth rate and the effect of deformation accumulation

Pending Publication Date: 2017-12-22
CHINA RAILWAY 11TH BUREAU GRP +1
View PDF0 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a prestressed anchor cable for extruded weak surrounding rock tunnels in view of the lack of systematic arrangement of anchor cable sup

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
  • Squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and construction technology
  • Squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and construction technology
  • Squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and construction technology

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] The present invention will be further described in detail below in conjunction with the description of the drawings and the specific embodiments.

[0025] See Figure 1 to Figure 2 , A prestressed anchor cable group supporting structure for a squeezed weak surrounding rock tunnel, comprising arch speed control anchor cable 1, side wall speed control anchor cable 2, arch limit anchor cable 3, side wall limit anchor cable 4. The arch lock foot anchor cable 5, the side wall lock foot anchor cable 6, the first layer initial support 7 and the second layer initial support 8. The first layer of initial support 7 is a conventional initial support, the first layer of initial support 7 includes a first layer of steel arches, and the first layer of steel arches are embedded in spray concrete; The second layer of primary support 8 is a conventional primary support, and the second layer of primary support 8 includes a second layer of steel arches, which are embedded in spray concrete. ...

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 a squeezing weak surrounding rock tunnel prestressed anchor cable group support structure and a construction technology. The support structure comprises arch speed control anchor cables (1), side wall speed control anchor cables (2), arch limiting anchor cables (3), side wall limiting anchor cables (4), arch locking anchor cables (5), side wall locking anchor cables (6), a first layer primary support (7) and a second layer primary support (8); all anchor cables in the construction technology adopt drilling and grouting simultaneously, however, reserved tensioning is conducted according to times, batches and parts. Controlling release on surrounding rock stress is achieved, the surrounding rock deformation growth rate and deformation accumulation amount are lowered, large deformation is effectively controlled, steel arch centering replacement caused by too large deformation is avoided, and the surrounding rock collapse hazard is lowered; in addition, the work efficiency is improved, constructors can conduct drilling conveniently, and it is guaranteed that the anchor cable positions are accurate, and tensioning can be conducted in time.

Description

technical field [0001] The present invention relates to a tunnel prestressed anchor cable group support structure and construction technology, more specifically to an extruded weak surrounding rock tunnel prestressed anchor cable group support structure and construction technology, which belongs to the extruded surrounding rock The field of tunnel technology. Background technique [0002] Extrusion-type weak surrounding rock tunnels have the characteristics of large amount of deformation, fast deformation rate, long deformation time, and wide range of disturbance influence during excavation, and have obvious rheological characteristics in the later stage. Because the prestressed anchor cable can change the internal force state of the surrounding rock through prestress and play a certain role in controlling the deformation, so the anchor cable support is usually used to control the deformation of the tunnel at present. However, due to the large amount of deformation and long...

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
IPC IPC(8): E21D21/00E21D20/02
CPCE21D21/0053E21D20/02
Inventor 熊晓晖王更峰张旭东唐达昆刘国雄何磊夏明锬陈龙王永太张晓晓李行利徐浩然吴占瑞汪靖
Owner CHINA RAILWAY 11TH BUREAU GRP
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