防渗土工膜的缺陷特性与缺陷渗漏研究进展

详细阐述土工膜用于防渗工程时出现缺陷的形式与测试方法、缺陷分析理论与计算模型、缺陷预防原则与措施、垫层属性与接触渗流、不同接触和垫层条件下的缺陷渗漏量、缺陷渗漏影响因素等方面的国内外研究现状,对现有的研究成果进行分析、归纳、总结和评价。总结表明,由于土工膜缺陷问题的复杂性和不确定性,现有研究以试验研究为主,辅以一定的理论分析和数值模拟,各方法和理论得到的成果存在一定的差异性。为此,建议了与土工膜缺陷相关的可进一步研究的若干重点问题,促使设计和研究人员对土工膜缺陷问题尽早得以较为全面的认识和有效的控制。

Research progress on defect property and defect-induced leakage of impermeable geomembrane

In this paper,research on defects of geomembrane (GM) used in practical engineering in China and abroad is summarized and evaluated from the aspects of geomembrane defect types and test methods,theory of defect analysis and defect calculation model,principles and measures of defect prevention,cushion layer properties and interface flow,the rate of leakage under different contact conditions and cushion layers,and factors of leakage induced by geomembrane defects. Analysis shows that,due to the complexity and uncertainty of geomembrane defects,current research is mainly based on experiments,accompanied by theoretical analysis and numerical simulation,producing different results from the theoretical results. Some key problems related to geomembrane defects that require further research are put forward so that an overall recognition and effective control of geomembrane defects can be realized as early as possible.