土石坝心墙水力劈裂分析

›› 2006, Vol. 27 ›› Issue (S2): 475-479.

土石坝心墙水力劈裂分析

朱俊高¹, 翁厚洋¹, 王俊杰²

1、河海大学岩土工程研究所，南京 210098，2、重庆交通大学，重庆 400074

收稿日期:2006-09-10 发布日期:2006-12-16
作者简介:朱俊高，男，1964年生，教授，博士生导师，主要从事土体本构关系、土石坝工程等方面的科研和教学工作。
基金资助:
国家自然科学基金（No.50579014）

Analysis of hydraulic fracturing of core of earth-rock dam

ZHU Jun-gao¹, WENG Hou-yang¹, WANG Jun-jie²

1. Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China; 2. Chongqing Jiaotong University, Chongqing 400074, China

Received:2006-09-10 Published:2006-12-16

摘要/Abstract

摘要： 简要分析了水力劈裂的发生条件、力学机理。基于水压楔劈机理，利用有限元方法建立了一种水力劈裂的发生判定方法。该方法假定心墙预先存在局部渗透弱面（裂缝），通过将裂缝位置的单元材料改为裂缝软材料，考虑库水进入裂缝后对裂缝周围土体的作用，建立水力劈裂分析的平面有限元模型，确定裂缝端部垂直于裂缝面的正应力，进而依据该正应力判断水力劈裂发生的可能性，该方法同时可模拟水力劈裂的发展过程。

Abstract: The induced condition and mechanical mechanism of hydraulic fracturing is briefly analysed. Based on the triangle fracturing under water pressure and finite element method, an approach is suggested to judge the occurrence of hydraulic fracturing. In this approach it is assumed that there exist local permeable weak planes (cracks) in core; and the plane finite element method (FEM) for hydraulic fracturing analysis is established. The crack is taken as a soft material; and the effect of water pressure acting on both sides of the crack is modeled. By using FEM, the stress of element at the crack tip is obtained; and the possibility of hydraulic fracturing is judged. This approach can also simulate the development of hydraulic fracturing.

Key words: earth-rock dam, hydraulic fracturing, water wedging, finite elements

中图分类号:

TV641.4

朱俊高 , 翁厚洋 , 王俊杰,. 土石坝心墙水力劈裂分析[J]. , 2006, 27(S2): 475-479.

ZHU Jun-ga , WENG Hou-yang , WANG Jun-jie,. Analysis of hydraulic fracturing of core of earth-rock dam[J]. , 2006, 27(S2): 475-479.

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