苏畅 谢宝丰 张凯 洪羽 王磊

摘 要：西霞院反调节水库工程属国内首次大规模采用土工膜防渗的大型水库工程，土工膜防渗面积大，其耐久性直接關系工程安全。在现场调查基础上，对西霞院反调节水库土石坝段土工膜相关监测数据进行全面、系统、深入分析，结合室内试验模拟不同影响因素下土工膜耐久性，采用有限元法分析土工膜缺陷部位和尺寸对土石坝渗流的影响，并采用线性加权法和层次分析法建立土工膜防渗安全评价指标体系对土工膜防渗安全性进行综合评价。土工膜防渗安全性评价结果表明，复合土工膜防渗安全性为正常。

关键词：复合土工膜;耐久性;防渗安全;西霞院反调节水库

中图分类号：TV641

文献标志码：A

doi：10.3969/j.issn.1000-1379.2021.12.026

引用格式：苏畅，谢宝丰，张凯，等.西霞院反调节水库复合土工膜耐久性及其防渗安全分析[J].人民黄河，2021，43（12）：131-134，138.

Abstract： Xixiayuan Anti-Regulating Reservoir Project is the first large-scale reservoir project using geomembrane for seepage control on the main stream of the Yellow River. The geomembrane has a large anti-seepage area and its durability is directly related to the safety of the project. Based on the field investigation， the monitoring data related to geomembrane of Xixiayuan Anti-Regulation Reservoir were comprehensively， systematically and deeply analyzed and the relationship between its dynamic change and external environmental factors was analyzed. Combined with the durability test of geomembrane under different factors simulated in the laboratory， the influence of different positions and sizes of geomembrane defects on the seepage of earth rock dam was analyzed by finite element method. The evaluation index system of geomembrane anti-seepage safety was established by using linear weighted method and analytic hierarchy process. Finally， suggestions for operation and management were given. The research has formed the technical theory with certain theoretical level and reference value， which provides successful experience for the further promotion and application of geomembrane in water conservancy projects.

Key words： composite geomembrane; durability; anti seepage safety; Xixiayuan Anti-Regulating Reservoir

复合土工膜作为防渗体在水库工程中应用的安全问题一直受到工程技术人员和科研人员的重视[1-2]。我国已建的土工膜防渗土石坝坝高多在50 m以下，且均建在较小的河流上。在大江大河上建造土工膜防渗土石坝是一种挑战，也是一次工程技术突破，在国内大型水库中大规模采用土工膜作为防渗材料，西霞院反调节水库尚属首次。

在现场调查基础上，对西霞院反调节水库土石坝段土工膜相关监测数据进行全面、系统、深入分析，模拟不同因素影响下土工膜耐久性，采用有限元法分析土工膜缺陷部位和不同尺寸对土石坝渗流的影响，并建立土工膜防渗安全评价指标体系对土工膜防渗安全性进行综合评价。……