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

Measurement method for stress change of rocks during TBM tunneling

A measurement method and technology of surrounding rock stress, applied in the direction of measuring force, measuring devices, instruments, etc., can solve problems such as the reduction of the headroom of the cavern section, the impact on the secondary lining of the tunnel, and the difficulty of initial support, so as to speed up the construction progress and save Engineering quantity, to ensure the effect of overall stability

Active Publication Date: 2010-12-22
POWERCHINA HUADONG ENG COPORATION LTD
View PDF2 Cites 32 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In TBM tunnel design, if the amount of convergence deformation of the surrounding rock is too large, the clearance of the cave section will be greatly reduced, and it will be difficult for the TBM operation room and backup sleeve to pass through, which will cause difficulties in the initial support and affect the secondary lining of the tunnel

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
  • Measurement method for stress change of rocks during TBM tunneling
  • Measurement method for stress change of rocks during TBM tunneling
  • Measurement method for stress change of rocks during TBM tunneling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] Such as figure 1 , figure 2 It can be seen that although the TBM excavation has little disturbance to the surrounding rock, it will still change the stress field of the original rock and affect the stability of the cavern. Unlike the drill and blast method, the TBM excavation has less damage to the surrounding rock and will not Destroy the pre-embedded hollow inclusion stress gauge, so the hollow inclusion stress gauge 1 can be buried at the design position in advance to monitor the stress change of the surrounding rock during TBM excavation. The steps are as follows:

[0017] a. Considering the comprehensive influence of the numerically calculated stress results, topography, rock mass strength, and faults, reasonably determine the embedding position and number of measuring points of the hollow inclusion stress gauge 1, and arrange the measuring points in the section 3 of the tunnel to be excavated by the TBM. And ensure the integrity of the surrounding rock mass. At ...

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 measurement method for stress change of rocks during TBM tunneling. The technical problems to be solved in the invention are as follows: providing the measurement method for stress change of rocks during TBM tunneling, measuring the three-dimensional stress change of some point in rock of a TBM evacuation hole section, judging the damaged range of the rock, and optimizing supporting design to ensure the overall stability of a grotto and the safety of stuff. The technical scheme for solving the problem is as follows: the measurement method for stress change of rocks during TBM tunneling comprises the following steps: a, determining the embedding position and the quantity of measure points of a hollow inclusion stressometer; b, digging an auxiliary hole or using an existing grotto to drill a TBM hole section to be evacuated and embedding the hollow inclusion stressometer; c, performing TBM tunneling, monitoring and recording the stress change of the hollow inclusion stressometer; d, determining the elastic modulus and Poisson ratio of rock of a section to be measured; and e, working out an equation, i.e. E epsilon k=Ak1sigmax+ Ak2sigmay + Ak3sigmaz + Ak4tauxy + Ak5tauyz + Ak6tauzx, solving the six components, namely sigmax, sigmay, sigmaz, tauxy, tauyz and tauxz of ground stress. The measurement method is mainly used for the supporting optimization design of construction time of tunnels and the like and the estimation of overall stability of grottos.

Description

technical field [0001] The invention relates to a method for measuring surrounding rock stress changes during TBM excavation, which can be used as a direct measurement method for stress disturbance of cavern surrounding rock during TBM excavation, and is suitable for the optimal design of support during the construction period of tunnels and the overall stability of caverns Evaluation. Background technique [0002] Full-face tunnel boring machine TBM (Tunnel Boring Machine) is currently one of the most effective and advanced large-scale comprehensive construction machines for long tunnel construction in the world, and has become the mainstream of rapid tunnel excavation in the world. Compared with the traditional drilling and blasting method, TBM has the advantages of rapidity, high quality, safety, etc. It can continuously excavate and remove muck, and the construction speed is fast; there is no blasting, the excavation has very little over-excavation, and the deflection of...

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): G01L1/22
Inventor 张春生陈祥荣侯靖褚卫江吴旭敏刘宁
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