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排水板外起过滤作用的滤膜种类多,性能差别大,为探究不同排水板滤膜在真空加固软基过程中的性能差别,设计室内单井模型试验,对3种排水板滤膜进行研究,研究表明:1等效孔径较大的排水板滤膜抗淤堵能力强,加固效果好;2纤维强度较高的排水板滤膜抵抗受力变形能力强,抗淤堵性能好;3加固过程中,竖向排水体附近土粒发生流失,滤膜孔径越大、距离滤膜越近土粒流失越多;4实际工程中,在满足保土性要求前提下,建议优先考虑纤维力学强度高、等效孔径较大的滤膜。
In order to explore the different performance of different drainage membrane filter in the process of vacuum strengthening soft foundation, single-well indoor model test was conducted to study the three kinds of drainage membrane filter The research shows that: 1 The drainage membrane with larger equivalent diameter has stronger anti-clogging ability and better reinforcing effect; 2 The drainage membrane with high fiber strength has strong resistance to deformation and anti-clogging performance; During the process, the soil particles near the vertical drainage body will be lost, and the larger the pore size of the filter membrane, the more the soil particles will be lost from the filter. 4 In the actual project, under the prerequisite of satisfying the requirements of soil conservation, it is suggested to give priority to the fiber mechanics strength High, equivalent pore size larger filter.