Rock-pile-like tunnel surrounding rock quality evaluation method

A technology for quality evaluation and rock piles, applied in resources, instruments, data processing applications, etc., can solve problems such as single evaluation, and achieve effective guidance management, risk control, and tunnel excavation management

Pending Publication Date: 2020-10-16
中电建路桥集团有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The stability of tunnel excavation in rock-like mound surrounding rock is mainly determined by the rock mass of rock-like mound and the discontinuity surface of the surrounding rock block-soil binary structure of rock-like mound, and the quality of existing rock mass cannot be used at all. and the soil quality evaluation method to perform a single evaluation, for this reason the present invention needs to establish a new evaluation method for the "rock + soil" type rock pile

Method used

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  • Rock-pile-like tunnel surrounding rock quality evaluation method
  • Rock-pile-like tunnel surrounding rock quality evaluation method
  • Rock-pile-like tunnel surrounding rock quality evaluation method

Examples

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Embodiment 1

[0178] A certain type of rock mound tunnel on the Jianshui (Gejiu)-Yuanyang Expressway in Yunnan Province was cut with fractured rock mass, which contains multiple groups of structural planes. The stratum skeleton parameter Ai value of the invented rock mound tunnel can be determined to be 5.48. ;Because it is a layered rock mound surrounding rock, its stratigraphic fabric parameter Ci is 9.00; the surrounding rock has a general moisture content and connectivity, so its hydraulic coefficient Hi can be determined to be 12.00; the rock mound surrounding rock has a certain cohesion The shear resistance parameter Pi is 16.00; the hardness of the surrounding rock in this section of the tunnel is acceptable, and its strength index coefficient Si is 12.6; the excavation method is excavated by smooth blasting, and its dynamic coefficient DFi is 0.85; the impact coefficient of excavation technology ETi is 0.99.

[0179] Based on I-TTGS evaluation index value formula 7:

[0180] (I)=(A...

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Abstract

The invention provides a rock-pile-like body tunnel surrounding rock quality evaluation method. The method is characterized in that An I-TTGS total formula is explored and determined from two aspectsof a rock-pile-like body and a supporting structure based on the idea and method (I-System) of tunnel excavation and supporting synergy integration; Ai, Ci, Hi, Pi, Si, DFi and ETi are substituted into an I-TTGS total formula for calculation, a result I is obtained, and the quality of the rock-like pile surrounding rock can be represented and evaluated according to the percentage. And the qualityof the surrounding rock of a rock-pile-like tunnel can be quantitatively determined according to different I value percentages (full score is 100). The quality evaluation of rock-and-soil rock-like heap surrounding rock is realized; effective guidance and management are carried out on rock-like heap tunnel safety construction, and tunnel excavation management and risk management and control are facilitated.

Description

technical field [0001] The invention relates to the field of tunnel structure design and safe construction in the surrounding rock of rock-like piles. Background technique [0002] Rock mass quality evaluation is a crucial link in tunnel design and construction. Accurate investigation and dissection of the surrounding rock mass of the tunnel, and then a reasonable evaluation, is an effective means to establish a tunnel geological model, which is widely used in tunnel structure design and tunnel excavation technology. At present, the quality evaluation methods for rock and soil are still limited to a single method for rock or soil, and there is no quality evaluation method for rock-like piles. For example, the well-known methods such as RMR and Q systems (see literature R.K, Goel, etc. Correlation between Barton's Q and Bieniawski's RMR—A new approach [J]. International Journal of Rock Mechanics&Mining Sciences&Geomechanics Abstracts, 1996.) are aimed at the quality of rock ...

Claims

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Application Information

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IPC IPC(8): G06F30/13G06F30/20G06Q10/06
CPCG06Q10/06393G06F30/13G06F30/20
Inventor 刘晖张子新马治国黄昕赵国军王帅峰王杰
Owner 中电建路桥集团有限公司
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