|Table of Contents|

Stress Analysis of Wellbore Rock Based on Unified Strength Theory(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2009年03期
Page:
105-109
Research Field:
Publishing date:
2009-09-20

Info

Title:
Stress Analysis of Wellbore Rock Based on Unified Strength Theory
Author(s):
WANG Ji-xiu1;  ZHAO Jun-hai1;  WANG Le-jian2;  WANG Ji-xian3;  SUN Shan-shan1
1. School of Civil Engineering, Chang'an University, Xi'an 710061, Shaanxi, China; 2. Xi'an Vanke Co., Ltd., Xi'an 710068, Shaanxi, China; 3. Qingdao Ketan Heavy Industry Machinery Co., Ltd., Qingdao 266500, Shandong, China
Keywords:
unified strength theory;  wellbore rock;  seepage action;  correction of effective stress;  elasto-plastic analysis
PACS:
TU452
DOI:
-
Abstract:
Considering the effect of seepage action and pore water pressure on the rock around a wellbore, the effective stress was corrected. Based on unified strength theory, full considering the effect of intermediate principal stress, the elasto-plastic analyses were carried out. The expressions of stress distribution for the rock around a wellbore and the unified solutions of the elastic and plastic limit loads for the shaft stability were deduced. The analytical results indicate that through changing the parameters in the formulas, the solutions can be degenerated to analytical expressions in other strength theories simply, furthermore, the unified solutions can be applied for the elasto-plastic analyses of all kinds of rocks. More profitable theoretical data can be offered by limit analysis after the correction of effective stress forthe shaft stability, and the methods have certain theoretical and practical application values.

References:

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Last Update: 2009-09-20