北京交通大学学报2016，Vol.40Issue(6)：7-13,31,8.DOI:10.11860/j.issn.1673-0291.2016.06.002
泥水盾构泥浆在砂土地层中的渗透特性及对地层强度的影响
Seepage characteristics of slurry and its influence on ground strength of slurry shield in sand
摘要
Abstract
During slurry shield tunneling,a filter cake with low permeability will be formed on the working face when pressurized slurry infiltrates into the stratum.To ensure the stability of the working face,the slurry pressure which acts on the filter cake that is almost impervious to water to counteract the soil pressure and water pressure.Based on the Nanjing Weisan road river-cross-ing tunnel,three kinds of stratums with different grain size and gradations are picked to carry out a model experiment about pressurized slurry infiltrating into the stratum and to investigate the seepage characteristics and the influence law caused by infiltration of ground strength.According to the results,the permeability coefficient is an important factor influencing the permeability depth and the quality of the filter cake.The permeability depth and the amount of infiltration wa-ter both present a linear relationship with the permeability coefficient.The shear strengths altered by water and slurry show different change laws with the variation of grain size.The research can provide some references for reasonable slurry pressure of slurry shield.关键词
泥水盾构/泥膜/渗透特性/剪切强度Key words
slurry shield/filter cake/seepage characteristics/shear strength分类
交通工程引用本文复制引用
曹利强,张顶立,房倩,粟威,廖俊华..泥水盾构泥浆在砂土地层中的渗透特性及对地层强度的影响[J].北京交通大学学报,2016,40(6):7-13,31,8.基金项目
中央高校基本科研业务费专项资金资助(2015YJS107) （2015YJS107）
