中南大学学报（自然科学版）2017，Vol.48Issue(2)：465-472,8.DOI:10.11817/j.issn.1672-7207.2017.02.026
基于颗粒流方法的土体压密注浆细观机理
Meso-mechanism of compaction grouting in soil based on particle flow method
摘要
Abstract
In order to reveal the diffusion law and consolidation effect in high pressure slurry of compaction grouting, the particle flow method was used to analyze the meso-mechanism of grouting in consideration of different grouting pressures, soil cohesion force and friction coefficient. With particle flow fish language, the grouting model was established, and the servo mechanism was used to apply different grouting pressures to simulate the grouting process. The results show that with the increase of grouting pressure, soil around the grouting point is compressed gradually, and the soil porosity becomes smaller. The soil within radius of 0.5 m around the grouting point is the most sensitive to the grouting pressure and deforms most rapidly. The additional stress of the soil around the grouting point increases with the increase of the grouting pressure. There is an optimum grouting pressure for a specific soil condition in practice. The cohesion force of soil particles has significant influence on the slurry diffusion. When the soil cohesion force is small, the radius of grouting bulbs increases with the increase of grouting pressure. When the soil cohesion force is big, grouting pressure has little effect of on the grouting bulb size. The effect of compaction grouting is undermined in this situation greatly. The friction coefficient of soil particles has little influence on the grouting performance.关键词
压密注浆/颗粒流/细观机理Key words
compaction grouting/particle flow/meso-mechanism分类
交通工程引用本文复制引用
周子龙,赵云龙,陈钊,杜雪明,吴志波..基于颗粒流方法的土体压密注浆细观机理[J].中南大学学报（自然科学版）,2017,48(2):465-472,8.基金项目
国家重点基础研究发展计划(973计划)项目(2015CB060200) （973计划）
国家自然科学优秀青年基金资助项目(51322403) （51322403）
广西省交通厅项目(2015年)(Project(2015CB060200) supported by the National Basic Research Development Program(973 Program) of China （2015年）
Project (51322403) supported by the National Natural Science Foundation for Outstanding Young Scientists of China （51322403）
Project(2015) supported by Traffic Department of Guangxi Zhuang Autonomous Region) （2015）
