吉河水库大坝坝体及坝基防渗处理措施的探讨
|
摘要
湖北省枣阳市吉河水库大坝坝线长,坝基工程地质条件复杂多变。由于建坝时坝基清基不彻底,坝体填筑质量不高,30余年的运行中渗漏严重,水量损失大,大坝渗透坡降0.25,渗流量2.54 m~3/d。根据坝体、坝基渗漏原因,提出了水平防渗和垂直防渗的比选方案。采用水平防渗后渗透坡降为0.17,渗流量为1.23 m~3/d;采用垂直防渗后渗透坡降和渗流量为0.01、0.09 m~3/d,说明垂直防渗的效果更好。经技术、经济综合比较,推荐采用槽孔混凝土防渗墙方案对坝体及坝基进行防渗加固处理。
The dam in Jihe Reservoir is of a long dam length and the dam foundation is of complex geological conditions. Due to the incomplete clearing work of the foundation and the unsatisfied filling quality of the dam body, serious leakage problem has been observed for over thirty years, which causes a huge water loss and large seepage gradients. With a detailed analysis on the causes of the leakage problem, two seepage control schemes, the horizontal scheme and the vertical scheme, are proposed and compared. Analysis shows that the seepage control performance of the vertical scheme is much better than that of the horizontal scheme. Considering the technical and economic factors comprehensively, a grooved concrete cutoff wall is finally adopted.
The dam in Jihe Reservoir is of a long dam length and the dam foundation is of complex geological conditions. Due to the incomplete clearing work of the foundation and the unsatisfied filling quality of the dam body, serious leakage problem has been observed for over thirty years, which causes a huge water loss and large seepage gradients. With a detailed analysis on the causes of the leakage problem, two seepage control schemes, the horizontal scheme and the vertical scheme, are proposed and compared. Analysis shows that the seepage control performance of the vertical scheme is much better than that of the horizontal scheme. Considering the technical and economic factors comprehensively, a grooved concrete cutoff wall is finally adopted.
引文
[1]翟子昊.水库增容工程防渗设计方案分析与研究[D].济南:山东大学,2016
[2]汪海龙,汪海涛.公路跨河桥段防渗设计的探讨[J].科技创新与应用,2012(15):182-183
[3]肖重华,刘龙虎,刘恒福,等.高压喷射灌浆防渗技术在水库大坝基础处理中的应用[J].水文地质工程地质,2007,34(6):126-128
[4]王建,韦拥霞,庄千艳,等.特殊地层条件下的坝基防渗方案的设计与施工[J].浙江水利科技,2007(5):31-32
[5]陈洋,王立彬,王旭东.病险土石坝除险加固防渗方案的比选[J].水利科技与经济,2010,16(2):136-139
[6]谭进轩.水库大坝混凝土防渗墙施工技术探究[J].中国水能及电气化,2015(8):18-21
[2]汪海龙,汪海涛.公路跨河桥段防渗设计的探讨[J].科技创新与应用,2012(15):182-183
[3]肖重华,刘龙虎,刘恒福,等.高压喷射灌浆防渗技术在水库大坝基础处理中的应用[J].水文地质工程地质,2007,34(6):126-128
[4]王建,韦拥霞,庄千艳,等.特殊地层条件下的坝基防渗方案的设计与施工[J].浙江水利科技,2007(5):31-32
[5]陈洋,王立彬,王旭东.病险土石坝除险加固防渗方案的比选[J].水利科技与经济,2010,16(2):136-139
[6]谭进轩.水库大坝混凝土防渗墙施工技术探究[J].中国水能及电气化,2015(8):18-21