中南大学学报（自然科学版）2018，Vol.49Issue(5)：1213-1220,8.DOI:10.11817/j.issn.1672-7207.2018.05.024
劈裂注浆加固土体的数值模拟和试验研究
Numerical simulation and experimental study on soil split grouting reinforcement mechanism
摘要
Abstract
Considering that current research of soil split grouting reinforcement mechanism does not clearly distinguish between grouting compaction effect and slurry vein skeleton effect on soil strength, the effects of grouting compaction and slurry vein skeleton on cohesion, internal friction angle, compressive strength and deformation properties of soil under different confining pressures were studied by numerical analysis and laboratory tests. Hereby, main controlling factor affecting split grouting reinforcement and calculation method of grouting quantity was obtained. The results show that the embedded slurry vein destroys the soil integrity and heterogeneity. Since the mechanical properties between soil and slurry vein are significantly different, a large non-coordinated deformation occurs when the relative displacement is large. Due to the stress concentration, the plastic deformations first appear on slurry vein edges, then extends to the soil gradually, and the macro shear surface is formed when plastic deformations overlap each other. Grouting compaction effect is the main controlling factor, and controlling the grouting slurry distance, reaching the grouting engineering quantity, strengthening the grouting compaction effect are key factors to ensure the effect of grouting reinforcement.关键词
土体加固/注浆挤密作用/浆脉骨架作用/三轴压缩/数值分析Key words
soil reinforcement/grouting compaction/slurry vein skeleton/three axis compression/numerical analysis分类
交通工程引用本文复制引用
朱明听,张庆松,李术才,刘人太,张连震..劈裂注浆加固土体的数值模拟和试验研究[J].中南大学学报（自然科学版）,2018,49(5):1213-1220,8.基金项目
国家重点研发计划(2016YFC0801600) （2016YFC0801600）
国家自然科学基金资助项目(41272385) （41272385）
国家青年科学基金资助项目(51309146)(Project(2016YFC0801600)supported by the National Key Research and Development Program of China （51309146）
Project(41272385)supported by the National Natural Science Foundation of China （41272385）
Project(51309146)supported by the National Natural Science Foundation for Young Scientists of China) （51309146）
