接触冲刷

接触冲刷发展过程模拟研究

Simulation Study on the Contact Scouring Development Between Underground Layers

坝基实际渗漏量异常，存在管涌和接触冲刷问题，尤其库水位低至193.84m，坝后上升泉仍有沙沸现象。

The actual seepage quantity of the dam foundation was unconventional , there were the questions of piping of the highly permeable layer and contact erosion , especially , the reservoir level was under 193.84 m , sand boil in ascending spring behind dam appears .

采用高压旋喷在坝基建造灌浆盖板，改善了灌浆条件，取得了良好的灌浆效果，并且有效地截断坝基表层的渗漏，减少了坝基的接触冲刷破坏。

Application of high-pressure rotary grunting in constructing grouting decking on the dam foundation can not only improve the condition of grouting and result in a perfect grouting , but also can prevent seepage of dam foundation surface effectively and reduce damage from scouring to the dam foundation .

土的渗漏破坏包括四种形式，它们是流土、管涌、接触流土和接触冲刷。

The earth seepage failure includes four types . It 's about mass flow 、 piping 、 contact mass flow 、 contact rush .