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在采用真空预压法处理含水率较高的吹填土时,常常引起塑料排水板外包滤膜的淤堵,这与塑料排水板外包滤膜本身等效孔径的不同有很大关系。基于2种不同等效孔径的排水板滤膜针对吹填土进行真空预压的模型试验,对比2种不同滤膜孔径情况下,真空预压过程中的出水量、出水速率以及滤膜表面沉降的不同特点;对不同滤膜等效孔径模型试验真空预压前后模型箱内土体的含水率、渗透系数和颗粒分布等特性进行对比分析。研究成果对进一步深化真空预压过程中土颗粒粒径和等效孔径之间的定量关系研究具有理论研究意义。
When vacuum preloading method is adopted to treat dredger fill with high water content, it often causes clogging of plastic drainage board outsourcing filter membrane, which has a great relation with the difference of equivalent aperture of plastic drainage board outsourcing filter membrane itself. Based on two kinds of drainage membrane with different equivalent diameters, the model test of vacuum preloading of dredger fill was carried out. Compared with the two kinds of filter aperture, the amount of water discharge, the effluent rate and the surface sedimentation The characteristics of soil moisture content, permeability coefficient and particle distribution before and after vacuum preloading in different membrane equivalent aperture model tests were compared and analyzed. The research results have theoretical significance to further study the quantitative relationship between soil particle size and equivalent pore size during vacuum preloading.