【摘要】 通过砂槽模型试验,研究了双层堤基设置悬挂式防渗墙情况下管涌发展并导致溃堤的过程和机理。试验结果表明,悬挂式防渗墙可以有效提高堤基管涌破坏的水平平均临界水力比降,降低管涌的危害程度,使堤基整体抵抗管涌破坏的能力显著提高,且布置在背水侧较临水侧更加有效。同时给出了悬挂式防渗墙的设计方法。更多还原

【Abstract】 Flume model tests are carried out to study the development processes of piping and its mechanism. From the tests, it can be concluded that suspended cutoffs can effectively increase the average critical horizontal seepage gradient of dike foundation and decrease the risk of piping. This type of cutoff can increase the integrated resistance of dike foundation against piping. It will be more effective when the cutoff is placed in landside than in riverside. Design methods for suspended cutoffs are suggested.更多还原