Action law of clay shock construction method on surface deformation of shield tunnels
Shield construction in soft soil areas faces serious surface deformation problems.Clay shock construction method is an important control measure to alleviate surface deformation.In order to study the action law of clay shock construction method on the surface deformation of shield tunnels,based on the shield project of Yu-Zhu section of Suzhou Rail Transit Line 11,the com-pression test of clay shock slurry was carried out first,and the slurry compression deformation law was obtained.Then,the finite el-ement model of the double equivalent layer of the shield tunnel under the clay shock grouting method was established to study the influence of clay shock construction method on the surface deformation.The results showed that the compression deformation curve of the slurry was approximately linear,and the performance of the slurry was obviously affected by the addition rate of liquid B.When the addition rate of liquid B was 4%,the slurry had strong resistance to deformation.The established double equivalent lay-er model can perfectly simulate the influential characteristics of the clay shock method on the surface deformation,and the clay shock method assisting shield construction can reduce the maximum surface settlement by about 78%.The filling rate of clay slur-ry had a significant effect on the surface subsidence.When the slurry filling rate was about 150%,the control effect on the surface subsidence was the best.The research results provide reference for the application of the clay shock method in shield tunnel engi-neering.
shield tunnelsurface deformationclay shockslurry filling ratedouble equivalent layer model
国家科技期刊平台
NSTL
万方数据
维普
