木河桥水库面板坝缺陷渗透稳定性数值模拟研究
|
摘要
为研究木河桥水库面板坝不同缺陷在库水位变动工况下的上下游坝坡渗透稳定性规律,利用Geo-studio软件进行数值模拟,得到缺陷面板坝的坝后浸润线高程、渗漏量及稳定性变化规律。研究结果表明,库水位高程越高,面板坝坝后浸润线高程越高,坝体的渗漏量越大,上游坝坡安全系数越大,下游坝坡安全系数越小;库水位骤降速率越大,最小安全系数出现的时刻越早,最小安全系数也越小;一旦面板发生缺陷,面板坝后的浸润线及渗漏量会出现较大的增长,安全系数下降幅度也较大,缺陷高程越高,面板坝后浸润线高程及渗漏量越大,安全系数也越小。
In order to study the seepage stability of upstream and downstream dams with different defects in Muheqiao reservoir under the condition of changing reservoir water level,the numerical simulation is carried out by using Geo-studio software,and the height of embankment line behind the dam is obtained. The results show that the higher the height of reservoir water level,the higher the height of the wetting line behind the concrete face dam,the greater the leakage of dam body,the greater the safety factor of upstream dam slope and the smaller the downstream dam slope safety factor. The greater the rate of sudden drop of reservoir water level,the earlier the minimum safety factor appears and the smaller the minimum safety factor is. The higher the height of defect,the greater the height and leakage of the infiltrating line behind the concrete face dam,the smaller the safety factor.
In order to study the seepage stability of upstream and downstream dams with different defects in Muheqiao reservoir under the condition of changing reservoir water level,the numerical simulation is carried out by using Geo-studio software,and the height of embankment line behind the dam is obtained. The results show that the higher the height of reservoir water level,the higher the height of the wetting line behind the concrete face dam,the greater the leakage of dam body,the greater the safety factor of upstream dam slope and the smaller the downstream dam slope safety factor. The greater the rate of sudden drop of reservoir water level,the earlier the minimum safety factor appears and the smaller the minimum safety factor is. The higher the height of defect,the greater the height and leakage of the infiltrating line behind the concrete face dam,the smaller the safety factor.
引文
[1]张嘎,张建民,洪镝.面板堆石坝面板出现裂缝工况下的渗流分析[J].水利学报,2005,36(4):420-425.
[2]王瑞骏,吕海东,李炎隆.堆石坝混凝土面板裂缝的渗流形态及计算模型[J].水资源与水工程学报,2008,19(1):15-18.
[3]许光祥,张永兴,哈秋舲.粗糙裂隙渗流的超立方和次立方定律及其试验研究[J].水利学报,2003,34(3):74-79.
[4]高俊,党发宁,王振华.混凝土面板堆石坝局部止水缝失效渗透稳定分析[J].西安理工大学学报,2015(2):220-224.
[5]李炎隆,王瑞骏,李守义,等.混凝土面板堆石坝面板缝隙渗流计算模型研究[J].应用力学学报,2010,27(1):145-150.
[6]吕高峰,王玉洁,朱锦杰.某面板堆石坝垂直缝破损渗漏量估算方法的适用性分析[J].水电能源科学,2015(5):65-68.
[7]Fredlund D G,Xing A.Equations for the Soil-Water Characteristic Curve[J].Canadian Geotechnical Journal,1994,31(4):521-532.
[8]岑威钧,和浩楠,温朗昇.防渗面板的缺陷特性与缺陷渗漏研究进展[J].河海大学学报:自然科学版,2017(1):36-44.
[9]孙丹,沈振中,崔健健.面板缺陷引起的面板防渗砂砾石坝渗漏数值模拟[J].水电能源科学,2013(4):69-73.
[10]李传奇,李超超,王帅,等.平原水库面板防渗特性分析[J].长江科学院院报,2016(4):135-139.
[11]岑威钧,和浩楠,李邓军.面板缺陷对土石坝渗流特性的影响及控制措施[J].水利水电科技进展,2017,37(3):61-65.
[2]王瑞骏,吕海东,李炎隆.堆石坝混凝土面板裂缝的渗流形态及计算模型[J].水资源与水工程学报,2008,19(1):15-18.
[3]许光祥,张永兴,哈秋舲.粗糙裂隙渗流的超立方和次立方定律及其试验研究[J].水利学报,2003,34(3):74-79.
[4]高俊,党发宁,王振华.混凝土面板堆石坝局部止水缝失效渗透稳定分析[J].西安理工大学学报,2015(2):220-224.
[5]李炎隆,王瑞骏,李守义,等.混凝土面板堆石坝面板缝隙渗流计算模型研究[J].应用力学学报,2010,27(1):145-150.
[6]吕高峰,王玉洁,朱锦杰.某面板堆石坝垂直缝破损渗漏量估算方法的适用性分析[J].水电能源科学,2015(5):65-68.
[7]Fredlund D G,Xing A.Equations for the Soil-Water Characteristic Curve[J].Canadian Geotechnical Journal,1994,31(4):521-532.
[8]岑威钧,和浩楠,温朗昇.防渗面板的缺陷特性与缺陷渗漏研究进展[J].河海大学学报:自然科学版,2017(1):36-44.
[9]孙丹,沈振中,崔健健.面板缺陷引起的面板防渗砂砾石坝渗漏数值模拟[J].水电能源科学,2013(4):69-73.
[10]李传奇,李超超,王帅,等.平原水库面板防渗特性分析[J].长江科学院院报,2016(4):135-139.
[11]岑威钧,和浩楠,李邓军.面板缺陷对土石坝渗流特性的影响及控制措施[J].水利水电科技进展,2017,37(3):61-65.
© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号 地址：北京市海淀区学院路29号 邮编：100083 电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700 |