复杂应力路径下流体饱和砂岩本构模型

›› 2007, Vol. 28 ›› Issue (S1): 58-62.

复杂应力路径下流体饱和砂岩本构模型

田斌¹，卢应发¹，邵建富²

1. 三峡大学土木水电学院水利水电工程系，湖北宜昌 443002；2. 法国里尔科技大学里尔力学实验室，法国里尔 59655

收稿日期:2007-05-31 出版日期:2007-10-25 发布日期:2014-03-28
作者简介:田斌，男，1963年生，博士，教授，主要从事岩土力学与工程领域的教学与研究
基金资助:
教育部科学技术研究重点项目（No.26097）。

A constitutive model of sandstone with saturation fluid under complex loading paths

TIAN Bin¹, LU Ying-fa¹, J. F. Shao²

1. Department of Hydropower Engineering, School of Civil Engineering, Three Gorges University, Yichang 443002, China; 2. Laboratory of Mechanic of Lille, University of Science and Technology of Lille, Lille 59655, France

Received:2007-05-31 Online:2007-10-25 Published:2014-03-28

摘要/Abstract

摘要： 高孔隙率砂岩在不同围压及被不同流体（水及油）饱和时表现出不同的应力-应变特性及不同的破坏过程。复杂应力路径下油和水饱和砂岩的力学试验表明，存在某一临界围压，随着围压的增加，饱和砂岩从以压剪破坏为主，逐渐转变为以孔隙坍塌破坏为主的破坏机制。通过力学试验结果的分析，以两种破坏理论对油和水饱和砂岩的破坏特征进行了力学解释，并应用经典塑性力学的盖帽模型建立了相应的本构模型，应用非线性有限元法进行了数值验证，研究结果表明，提出的模型与试验资料吻合良好，能较好地模拟复杂应力路径下油和水饱和砂岩的破坏机制及模拟注水采油引起的砂岩附加沉降。

关键词: 复杂应力路径, 饱和砂岩, 油饱和, 水饱和, 本构模型

Abstract: A different mechanics behaviour and a different failure process are observed of the large porous sanstone with diffrent confining pressures and diffrent saturating fluids(e.g.oil and water). Laboratory tests under complex loading paths demonstrate that a critical value of confining pressure is proved to exist, when the confining pressure increases, the main pressure-shear failure is changed into slough failure. In this paper, two failure throries are used to explain failure processes of large porous sandstone with water saturation and oil saturation respectively through an analysis of the results of laboratory tests. A constitutive model of the saturating sandstone with different fluids of oil and water is established by using the typical plasticity, and 3-dimensional nonlinear FEM is used to check the elastoplastic model based on the laboratory tests. The numerical results show that the laboratory tests are good in agreement with the mumerical simulation results by using the model of the paper, and the several failure mechanisms under complex loading paths and the additional subsidence of large porous saturating sandstone from oil exploration by hydraulic grouting are also simulated well.

Key words: complex loading path, saturation sandstone, oil saturation, water saturation, constitutive model

中图分类号:

TU 458

田斌，卢应发，邵建富,. 复杂应力路径下流体饱和砂岩本构模型[J]. , 2007, 28(S1): 58-62.

TIAN Bin， LU Ying-fa， J. F. Shao ，. A constitutive model of sandstone with saturation fluid under complex loading paths[J]. , 2007, 28(S1): 58-62.

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