Shear creep and long-term strength test research on unconformity plane

PANG Zheng-jiang; HU Jian-min

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Shear creep and long-term strength test research on unconformity plane

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- Shear creep and long-term strength test research on unconformity plane
- Vol. 27, Issue S1, (2006)
- 作者机构：
  
  长江科学院岩基研究所,湖北,武汉,430010
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU458+.3
- Online First：15 December 2006，
  
  Published：2006
- 稿件说明：
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PANG Zheng-jiang, HU Jian-min. Shear creep and long-term strength test research on unconformity plane[J]. 2006, 27(S1).
DOI：

PANG Zheng-jiang, HU Jian-min. Shear creep and long-term strength test research on unconformity plane[J]. 2006, 27(S1). DOI：

摘要

针对某电站典型代表性的岩层，进行室内岩石剪切流变试验，对岩块在剪切变形过程中的流变特性进行深入研究，选取扩展的Burgers模型建立流变方程，用MATLAB工具函数fminsearch拟合试验得到的μ - t非线性函数流变曲线，确定岩体结构面的流变参数，并根据剪切流变试验确定其长期剪切强度。相对瞬时剪切强度，用长期强度进行设计更能保证工程的安全。

Abstract

In view of typical representative rock layer in a power plant

the rock shearing creep indoor test is carried out

to research creep characteristic in the rock mass shear failure process. This article selects the extended Burgers model to establish shearing creep equation; and uses the MATLAB tool function fminsearch to fit the nonlinear relation between U and t according to shearing creep test; determines creep parameters of structural plane in the rock mass; and determines its long-term shearing strength according to the direct shear test. Compared to the instant shearing strength

using the long-term strength in design is more reliable to guarantee the project security.

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