长江科学院院报2017，Vol.34Issue(4)：140-143,4.DOI:10.11988/ckyyb.20150494
注入初期盾构壁后注浆体的三轴试验研究
Experimental Study on the Triaxial Test of the Shield Backfill Grouting Material at Initial Stage
摘要
Abstract
Deformation and mechanical properties of backfill grouting material directly affect soil stress release,ground subsidence and late stress situation of segment lining.Based on triaxial test method of non-independent material,we take the rigid slurry and inert slurry as research objects,carrying out consolidated non-drained triaxial shear test.Results show that,1)high confining pressure contributes to the consolidation and drainage of the slurry,and the ultimate volumetric strain of the slurry increase with confining pressure;2)in the shearing process on the non-drained condition,slurry shows tendency of strain hardening,and the volume shrinks first,then with obvious shear dilatation.On the premise of deformation and construction requirements,we can suitably increase grouting pressure and use slurry with smaller water-glue ratio to ensure the construction quality of grouting body.关键词
盾构/壁后注浆/三轴试验/剪切应力/孔压消散/体应变Key words
shield/backfill grouting/triaxial test/shear stress/pore pressure dissipation/volume strain分类
交通工程引用本文复制引用
陈喜坤,朱伟,王睿..注入初期盾构壁后注浆体的三轴试验研究[J].长江科学院院报,2017,34(4):140-143,4.基金项目
国家重点基础研究发展计划(973)项目(2015CB057803) （973）
国家自然科学基金项目(51408191) （51408191）
江苏省疏浚与泥处理利用国家工程技术研究中心培育点项目(BM2013013) （BM2013013）
