平原水库防渗膜下气胀现象产生机制现场试验研究

›› 2014, Vol. 35 ›› Issue (1): 67-73.

平原水库防渗膜下气胀现象产生机制现场试验研究

袁俊平^{1, 2}，曹雪山^{1, 2}，和桂玲³，王豹^{1, 2}，刘英豪³，殷宗泽^{1, 2}

1. 河海大学岩土力学与堤坝工程教育部重点实验室，南京 210098；2. 河海大学岩土工程科学研究所，南京 210098； 3. 山东省水利勘测设计院，济南 250013

收稿日期:2012-10-05 出版日期:2014-01-10 发布日期:2014-01-14
作者简介:袁俊平，男，1975年生，博士，副教授，主要从事非饱和土力学与堤坝工程方面的研究工作

Field test study of mechanism of bulge phenomenon under geomembrane in plain reservoir

YUAN Jun-ping^{1, 2}，CAO Xue-shan^{1, 2}，HE Gui-ling³，WANG Bao^{1, 2}，LIU Ying-hao³，YIN Zong-ze^{1, 2}

1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China; 2. Geotechnical Research Institute, Hohai University, Nanjing 210098, China; 3. Shandong Survey and Design Institute of Water Conservancy, Jinan 250013, China

Received:2012-10-05 Online:2014-01-10 Published:2014-01-14

摘要/Abstract

摘要： 对库盘铺膜平原水库的气胀现象产生机制进行了理论探讨和现场试验研究。分析指出围坝填筑、库水位快速下降及地下水位上升等因素是导致膜下产生气胀的主要原因。在德州大屯水库进行了现场试验，模拟了不同膜上荷重、不同地下水位上升幅度和速率等试验工况，对膜下地层不同埋深处孔隙压力和膜下气胀现象进行了观测，分析了各因素对膜下气胀变化规律影响。试验结果表明，地下水位快速上升能够引起膜下气胀压力加大，地下水位上升幅度影响膜下气胀压力的大小；不同地下水位上升速率对膜下气场影响较小，在膜上设置一定荷载可较好地防止膜顶托或胀破。

关键词: 平原水库, 现场试验, 孔隙压力, 气胀现象, 土工膜

Abstract: Theoretical analysis and field test are carried out on the mechanism of bulge phenomenon under geomembrane in plain reservoir of which the bottom paved with geomembrane. It is pointed out that the uplifting or bursting problem will occur during surrounding embankment construction, reservoir water quick reduction or groundwater level rising. A field test is carried out at Dezhou Datun reservoir, during which different loadings over geomembrane, different amplitudes and rates of groundwater level rising are simulated and controlled. The pore pressure at different depths in soil is measured and the bulge phenomena under geomembrane are observed. The influences of different influence factors on gas field are analyzed. The results show that the groundwater level rapidly rising results in gas pressure increasing under geomembrane and the gas pressure value depends on the rising amplitude of groundwater level; different uplift rates have little influence on gas field under geomembrane. A certain loading over these geomembrane can effectively ensure the safety of geomembrane.

Key words: plain reservoir, field test, pore pressure, bulge phenomenon, geomembrane

中图分类号:

TV 223

袁俊平，曹雪山，和桂玲，王豹，刘英豪，殷宗泽 , . 平原水库防渗膜下气胀现象产生机制现场试验研究[J]. , 2014, 35(1): 67-73.

YUAN Jun-ping ，CAO Xue-shan ，HE Gui-ling ，WANG Bao ，LIU Ying-hao ，YIN Zong-ze , . Field test study of mechanism of bulge phenomenon under geomembrane in plain reservoir[J]. , 2014, 35(1): 67-73.

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