Preliminary Study on Formation law Simulation of filter-cake in slurry shield at Meso-scale level

摘要

In order to investigate the mechanism of mud membrane formation during slurry shield tunneling, mesoscopic particle flow method was carried out to examine the way of mud membrane forming in sandy soil stratum at granular level with combinations of the traits of (particle) discrete element model. This study showed that the type of mud membrane formed transit from mud cake to permeable mud cake zone with the increase of the diameter rate of strata soil and bentonite clay until an inability to form mud membrane in the same strata of the soil. Numerical simulation results and related laboratory test are in good accordance, it bear out that researching the It has been demonstrated that it is comparatively reasonable and effective to carry out research on the mechanism of mud membrane formation at a meso-scale level.