[1]肖瑶,邓华锋,方景成,等.考虑抗剪强度参数劣化的水库岸坡稳定性分析[J].自然灾害学报,2018,(02):100-106.[doi:10.13577/j.jnd.2018.0212]
 XIAO Yao,DENG Huafeng,FANG Jingcheng,et al.Considering the reservoir bank slope stability analysis under shear strength parameters of the degradation[J].,2018,(02):100-106.[doi:10.13577/j.jnd.2018.0212]
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考虑抗剪强度参数劣化的水库岸坡稳定性分析
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2018年02期
页码:
100-106
栏目:
出版日期:
2018-04-28

文章信息/Info

Title:
Considering the reservoir bank slope stability analysis under shear strength parameters of the degradation
作者:
肖瑶 邓华锋 方景成 张恒宾 王晨玺杰 宛良朋
三峡库区教育部重点实验室, 湖北 宜昌 443002
Author(s):
XIAO Yao DENG Huafeng FANG Jingcheng ZHANG Hengbin WANG Chenxijie WAN Liangpeng
Key Laboratory of Geological Hazards on Three Gorges Reservoir Area, China Three Gorges University, Ministry of Education, Yichang 443002, China
关键词:
水库岸坡抗剪强度劣化趋势整体稳定性降雨强度灾害防治劣化效应
Keywords:
reservoir bank slopeshear strengthdegradation trendglobal stabilityrainfall intensitydisaster preventiondegradation effect
分类号:
TU4;X93
DOI:
10.13577/j.jnd.2018.0212
摘要:
在水库正常运行过程中,库岸边坡岩土体物理力学特性不可避免的存在劣化的趋势,对应岸坡的整体稳定性也将逐渐降低。基于此,选取三峡库区典型岸坡,考虑水库运行过程中岸坡岩土体的劣化效应,对水库岸坡在降雨、库水位升降工况下的稳定性进行了计算分析。结果表明:(1)单纯考虑岸坡岩土体抗剪强度参数劣化时,当劣化比例达到30%左右时,岸坡达到临界破坏状态;(2)如果在抗剪强度参数劣化过程中考虑降雨作用,当劣化比例达到15%左右,在100 mm/d的极端暴雨情况下岸坡将达到临界破坏状态;(3)如果在抗剪强度参数劣化过程中考虑库水位上升或者下降作用,当劣化比例为15%~20%时,大于1 m/d的库水位升、降速率很可能导致岸坡达到临界破坏状态。因此,在岸坡地质灾害防治中,一方面,要考虑岸坡岩土体抗剪强度参数的实际劣化效应;另一方面,在水库运行过程中要合理的调整库水位运行调度方案。相关研究成果可为岸坡长期稳定分析评价提供较好参考。
Abstract:
In the process of the normal operation of the reservoir, the physical and mechanical characteristics of banks slope rock mass inevitably exists the trend of deterioration, the global stability of bank slope will change as well. Based on this, a typical bank slope is selected in the Three Gorges Reservoir in order to make calculation analysis of stability on consider the deteriorating effect of the reservoir bank slope rock mass as well as the rainfall and reservoir fluctuation under the process of working condition. Calculation analysis results show that:(1) while only take the shear strength parameters (cohesion and friction coefficient) degradation, when the rate of degradation is around 30%, the bank slope reaches a critical damage state; (2) if in the process of degradation of shear strength parameters with rainfall condition, when the rate of degradation is around 15% and under the extreme heavy rain conditions of 100 mm/d, the slope reaches a critical damage state; (3) if in the process of degradation of shear strength parameters with water level rising and falling, when the rate of degradation is around 15%~20% and the speed is greater than 1 m/d, the slope reaches a critical damage state. Therefore, in the bank slope geological disaster prevention, on the one hand, the actual degradation effect of shear strength parameters of rock and soil mass should be considered; On the other hand, the operation scheduling scheme should be adjusted reasonably. Related research results can provide a good reference for the bank slope stability analysis and evaluation.

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备注/Memo

备注/Memo:
收稿日期:2017-03-20;改回日期:2017-09-11。
基金项目:国家自然科学基金重点项目(51439003,51679127);湖北省自然科学基金重点项目(2015CFA140);三峡大学2015级硕士学位论文培优基金(2017YPY016)
作者简介:肖瑶(1992-),女,硕士研究生,主要从事岩土工程方面的研究工作.E-mail:aimme0515@163.com
通讯作者:邓华锋(1979-),男,教授,博士生导师,主要从事岩土工程方面研究.E-mail:dhf8010@ctgu.edu.cn
更新日期/Last Update: 1900-01-01