文档介绍:
复杂地基上重力坝深层抗滑稳定降强法试
验研究#
张林,杨宝全,陈媛,陈建叶,董建华*
5
10
(四川大学水利水电学院,水力学与山区河流开发保护国家重点实验室,成都 610065)
摘要:重力坝坝基中软弱结构面强度弱化行为是影响大坝稳定的一个重要因素。地质力学模
型降强法试验是研究该问题的一个重要途径,模型中通过采用变温相似材料实现了降强法试
验。本文对变温相似材料及其相应的试验技术做进一步的研究,利用最小二乘法原理,从理
论上拟合了抗剪断强度参数与温度之间的关系曲线,试验时通过拟合公式算得要降一定的强
度对应需要升高的温度值,从而在试验中准确进行降强。并将研究成果应用于某重力坝工程
中,将降强法和超载法相结合,开展了该重力坝整体稳定的综合法破坏试验,获得坝与地基
的变位特性、破坏形态和破坏机理,提出该重力坝降强法试验安全系数和综合稳定安全度,
评价了工程的安全性。
关键词:重力坝;软弱结构面;强度弱化;变温相似材料;降强法试验
15
中图分类号:TV321
文献标识码:A
Study on Intensity Reduction Method Test of Stability
Against Deep Sliding of Gravity Dam plex Rock
Foundation
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25
30
35
40
ZHANG Lin, YANG Baoquan, CHEN Yuan, CHEN Jianye, DONG Jianhua
(State Key Lab. of Hydraulics and Mountain River Eng., School of Hydraulic and Hydroelectric
Eng., Sichuan Univ., ChengDu 610065)
Abstract: The intensity weakening behavior of weak structural plane in the dam foundation is an
important factor influenced the stability of the gravity dam. Geo-mechanical model test with
intensity reduction method is an important way to study this problem, in the model, through the
use of temperature analogous material to realize intensity reduction method test. In this paper,
further research was done on the temperature analogous material and its corresponding test
technique. By using the least squares principle, the relation curves between shear strength
parameters and temperature were