复合土工膜防渗斜墙设计及模拟分析——以新疆恰木萨水电站工程为例
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摘要
坝体防渗是水电站坝体设计的重要内容之一,而复合土工膜防渗斜墙是目前应用最广泛的防渗技术之一。以新疆恰木萨水电站大坝为例,介绍了复合土工膜的力学特性,设计项目采用环保型HDPE复合土工膜,并通过试验确定小于10mm砂砾料最合适,最后通过有限元模拟得出本项目采用的复合土工膜满足坝体垂直、水平位移及最大主应力的使用要求,为以后类似工程施工提供必要的技术参考。
Seepage control of dam body is one of the impor tant contents of dam body design of hydropower station, and composite geomembrane diaphragm diaphragm wall is one of the most widely used seepage control technologies at present.Taking the dam of Qiamusa Hydropower Station in Xinjiang as an example, this paper introduces and analyses the mechanical characteristics of composite geomembrane, designs an environmental-friendly HDPE composite geomembrane for this project, and confirms the optimum size of sand and gravel material less than 10 mm through experiments. Finally,through finite element simulation, it is concluded that the composite geomembrane used in this project meets the requirements of vertical, horizontal displacement and maximum principal stress of the dam body. In the future, similar engineering construction can provide necessary technical reference.
Seepage control of dam body is one of the impor tant contents of dam body design of hydropower station, and composite geomembrane diaphragm diaphragm wall is one of the most widely used seepage control technologies at present.Taking the dam of Qiamusa Hydropower Station in Xinjiang as an example, this paper introduces and analyses the mechanical characteristics of composite geomembrane, designs an environmental-friendly HDPE composite geomembrane for this project, and confirms the optimum size of sand and gravel material less than 10 mm through experiments. Finally,through finite element simulation, it is concluded that the composite geomembrane used in this project meets the requirements of vertical, horizontal displacement and maximum principal stress of the dam body. In the future, similar engineering construction can provide necessary technical reference.
引文
[1]刘宗仁,张国兰,王登科.西霞院反调节水库复合土工膜斜墙砂砾石大坝防渗施工技术[J].水利水电科技进展,2009, 29(6).
[2]吴大志,余璐.土工膜缺陷对堤坝渗流影响的试验研究[J].浙江理工大学学报(自然科学版), 2016, 35(5):474-478.
[3]宗敦峰,刘建发,肖恩尚,等.水工建筑物防渗墙技术60年Ⅰ:成墙技术和工艺[J].水利学报,2016,47(3):455-462.
[4]王丰,张原川,常宁,等.切吉水库大坝土工膜防渗除险加固设计与施工[J].水利水电科技进展, 2016(5):45-49.
[5]张凤德,李秀文,彭云枫,等.胶凝砂砾石坝防渗措施及应力分析[J].中国水利水电科学研究院学报, 2015, 13(3):194-200.
[6]岑威钧,沈长松.复合土工膜防渗土坝坝坡的抗滑稳定性研究[J].水利规划与设计, 2012(4):54-56.
[2]吴大志,余璐.土工膜缺陷对堤坝渗流影响的试验研究[J].浙江理工大学学报(自然科学版), 2016, 35(5):474-478.
[3]宗敦峰,刘建发,肖恩尚,等.水工建筑物防渗墙技术60年Ⅰ:成墙技术和工艺[J].水利学报,2016,47(3):455-462.
[4]王丰,张原川,常宁,等.切吉水库大坝土工膜防渗除险加固设计与施工[J].水利水电科技进展, 2016(5):45-49.
[5]张凤德,李秀文,彭云枫,等.胶凝砂砾石坝防渗措施及应力分析[J].中国水利水电科学研究院学报, 2015, 13(3):194-200.
[6]岑威钧,沈长松.复合土工膜防渗土坝坝坡的抗滑稳定性研究[J].水利规划与设计, 2012(4):54-56.