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

卷:

26卷

期数:

2009年03期

页码:

105-109

栏目:

出版日期:

2009-09-20

文章信息/Info

Title:

Stress Analysis of Wellbore Rock Based on Unified Strength Theory

作者:

王继秀¹,赵均海¹,王乐健²,王继贤³,孙珊珊¹

1.长安大学建筑工程学院,陕西西安710061;2.西安万科企业有限公司,陕西西安710068; 3.青岛科泰重工机械有限公司,山东青岛266500

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

关键词:

统一强度理论;  井筒围岩;  渗流作用;  有效应力修正;  弹塑性分析

Keywords:

unified strength theory;  wellbore rock;  seepage action;  correction of effective stress;  elasto-plastic analysis

分类号:

TU452

DOI:

-

文献标志码:

A

摘要:

在考虑井筒周围岩石的渗流作用和孔隙水压力的基础上,对有效应力进行了修正; 基于统一强度理论,充分考虑中间主应力,对井筒周围岩石进行了弹塑性分析,并给出了井筒周围岩石的应力分布表达式和保持井壁稳定的弹性极限荷载及塑性极限荷载的统一解析式。分析结果表明:通过改变统一解析式中的参数,可将其退化为其他强度理论条件下的解析式,所得的统一解适用于不同强度理论条件下各类岩石材料的弹塑性分析; 有效应力修正后的极限分析为井壁稳定分析提供了理论依据,具有一定的理论及实际应用价值。

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.

参考文献/References:

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备注/Memo

备注/Memo:

收稿日期:2009-04-05
基金项目:教育部高等学校博士学科点专项科研基金项目(20040710001); 陕西省自然科学基础研究计划项目(SJ08E₂04)
作者简介:王继秀(1985-),女,山东临沂人,工学硕士研究生,E-mail:wangjixiu16899@163.com。

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更新日期/Last Update: 2009-09-20