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Numerical Analysis on Slag Removal of Diaphragm Wall Groove Bottom by Air-lift Reverse Circulation

ZENG Ji-wen;HU Fu-hong;GE Chao;CHEN Feng;WANG Run-tian;Wuhan Geological Prospecting & Foundation Engineering Co.,Ltd.;  
In order to study the application effect of air-lift reverse circulation in slag removal of diaphragm wall groove bottom,Fluent software was used to establish a two-dimensional model by means of simulated numerical analysis method. The placement depth of air-lift mixer,slag cleaning pressure of air compressor and slag diameter are taken as the research objects. It is concluded that the air-lift reverse circulation technology can effectively remove slag from the foundation pit bottom of diaphragm wall. The velocity of slag flowing out is 0. 014 ~ 1. 098 m/s,the escape velocity of clay particles is faster than that of slag with other sizes; and the thicker the slag is,the more difficult the slag removal is.
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