真空压力传递规律与渗透系数关系的试验研究  

Experimental Study on the Relationship between Vacuum Pressure Transfer Law and Permeability Coefficient

作　　者：李宁[1] 李向凤 吴跃东[3] 

机构地区：[1]江苏省交通科学研究院股份有限公司,南京210017 [2]中国水电建设集团路桥工程有限公司,北京100048 [3]河海大学岩土工程研究所,南京210098

出　　处：《路基工程》2011年第4期101-103,共3页Subgrade Engineering

摘　　要：采用自制的简化模型,进行不同工况的试验,得到真空度在土体中沿水平方向和深度方向的传递规律,及其在不同渗透系数土体中真空度的衰减差异;对试验数据进行拟合,设拟合曲线的斜率K为传递系数,得到不同渗透系数影响下的K值;根据研究结果,对真空预压实际工程中塑料排水板的布置形式及打设深度提出了建议。Through self-made simplified model test under different conditions,the transfer law of vacuum pressure along horizontal and vertical direction in soil mass and the attenuation difference of vacuum degree in different soil masses are obtained.After fitting test data,assumed that the slope K of fitting curve is transfer coefficient,then K value under different permeability coefficients can be obtained.According to research results,the layout and installation depth of plastic drainage plate in practical vacuum preloading engineering are recommended.

关 键 词：真空预压法 室内试验 真空度 渗透系数 传递规律 

分 类 号：U416.166[交通运输工程—道路与铁道工程]