防灾减灾工程学报2017，Vol.37Issue(6)：916-922,7.DOI:10.13409/j.cnki.jdpme.2017.06.009
合肥盾构地表沉降和土压力变化模型试验
Model Test on Surface Settlement and Earth Pressure in Hefei City Shield Tunneling
摘要
Abstract
The laws of surface settlement and earth pressure are different in different kinds of soil when shield machine passes through.With Hefei subway shield construction as the background,model tests with typical sand and clay of Hefei region as test material are conducted to investigate variation laws of settlement and earth pressure change,which are caused by shield excavation.The results show that the sand ground is more sensitive than the clay ground to the disturbance of excavation.The change of settlement and earth pressure of sand model is much faster than that of the clay model after excavation,as well as the rate of recovery of stability.The curve of final settlement trough of sand model has more fluctuation than that of clay model.While the settlement and earth pressure of clay model change smoothly and the curve of final settlement trough of clay model is relatively smooth.For both kinds of soil model,results also show that ra tios of settlement in excavation stage to final settlement are similar.The law of earth pressure decrease rate is basically identical with that of settlement rate during four experimental stages.The maximum value of settlement is observed at the formerly excavated side while the maximum value of settlement rate is at the latterly excavated side.关键词
盾构/模型试验/地表沉降/土压力/沉降槽Key words
shield tunneling/model test/surface settlement/earth pressure/settlement trough分类
建筑与水利引用本文复制引用
武文安,黄晓康,卢坤林,朱大勇..合肥盾构地表沉降和土压力变化模型试验[J].防灾减灾工程学报,2017,37(6):916-922,7.基金项目
国家自然科学基金项目(51179043,41402256)、合肥市轨道交通项目(2015FFCZ0617)资助 （51179043,41402256）
