|Table of Contents|

Evaluating rock masses excavation disturbed zone with method of stress redistribution(PDF)

长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]

Issue:
2011年04期
Page:
68-72
Research Field:
Publishing date:
2011-08-20

Info

Title:
Evaluating rock masses excavation disturbed zone with method of stress redistribution
Author(s):
YAN Chang-gen1;  LIN Feng2;  WU Fa-quan3;  YANG Xiao-hua1
1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, Sichuan, China; 3. Key Laboratory of Engineering Geology, Chinese Academy of Sciences, Beijing 100029, China
Keywords:
geotechnical engineering;  stress field;  excavation disturbed zone;  stress readjusted zone;  Xiaowan dam base
PACS:
TU452
DOI:
-
Abstract:
The stress will be redistributed in the rock mass after excavation, and the deformation of rock mass will be produced to balance the stress adjustment, then the mechanics properties of the rock mass near to the excavation surface will be deteriorated greatly. The formula for evalu- ating the excavation disturbed zone is derived with the method of rock stress redistribution and combined the characteristics of the structural surface of rock masses. Taking Xiaowan dam base excavation as an example, the heavy excavation disturbed zone and the weak excavation disturbed zone are calculated combined with the evaluating formula and numerical simulation. The numer- ical analysis results show that the heavy excavation disturbed zone is about 3～5 m, the weaken excavation disturbed zone is about 4～10 m, and the stress readjusted zone is about 10～25 m. The evaluating results are very close to the detection ones. 1 tab, 4 figs, 19 refs.

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Last Update: 2011-08-20