基于基床系数法的劈裂注浆过程分析

张乐文; 辛冬冬; 丁万涛; 宿传玺; 吴启龙; 王洪波

doi:10.11779/CJGE201803002

基于基床系数法的劈裂注浆过程分析 English Version

1. 山东大学海洋研究院,山东青岛 266237 250061;
2. 山东大学岩土与结构工程研究中心,山东济南 250061

基金项目: 国家自然科学基金项目（41572275）; 山东省自然科学基金

详细信息

作者简介:
张乐文(1972-),男,博士,教授,主要从事地质灾害超前预报与防治等方面的教学与研究工作。E-mail：lewenzhang@163.com。

通讯作者:
丁万涛，E-mail：dingwantao@sdu.edu.cn

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出版历程
- 收稿日期: 2016-12-27
- 发布日期: 2018-03-24

Process analysis of split grouting based on foundation bed coefficient method

1. Institute of Marine Science and Technology, Shandong University, Qingdao 266237, China;
2. Geotechnical and Structural Engineering Research Center, Shandong University, Jinan 250061, China

摘要

摘要: 为了揭示劈裂注浆中浆液扩散的动态过程及变化规律,基于基床系数法,研究了劈裂注浆过程中尺寸效应对土体变形的影响,建立了不同土体的劈裂缝宽度方程;假设浆液按平面辐射圆扩散,根据浆土应力耦合特性以及质量守恒定律对土体劈裂注浆过程进行了分析,获得了浆液扩散半径变化方程、浆液压力时空变化方程、劈裂缝宽度时空变化方程,并对浆液扩散规律与影响因素进行了分析。分析结果表明：浆液扩散半径随时间不断增长,但增长速率不断变缓,与基床系数标准值正相关,与浆液黏度负相关,黏性土小于砂土;浆液压力与时间、基床系数标准值正相关,绝大部分位置与浆液黏度正相关,黏性土小于砂土;劈裂缝宽度与时间正相关,绝大部分位置与基床系数标准值负相关、浆液黏度正相关,大部分位置黏性土大于砂土。与现场试验对比分析表明,理论计算值与实测值差异在可接受范围内,验证了本理论的合理性。
- 劈裂注浆 /
- 基床系数法 /
- 浆土应力耦合 /
- 过程分析
Abstract: In order to reveal the dynamic process and change rules of slurry diffusion in split grouting, the foundation bed coefficient method is employed to study the influence of size effect on deformation of different soils in the process of split grouting. The width equation of split crack of different soils is established. The form of slurry diffusion is supposed to be the horizontal radiation circle. The process of split grouting is analyzed based on the stress coupling effect of slurry and soil and the conservation of mass of slurry. Based on the above analysis, the equations for variations of slurry diffusion radius, temporal and spatial variations of slurry pressure and split crack width are obtained. The rules and influence factors of slurry diffusion are investigated. The analysis results show that the slurry diffusion radius continues to grow along with time, but the growth rate continues to reduce. The slurry diffusion radius is positively related to the standard value of foundation bed coefficient and negatively related to the slurry viscosity. The slurry diffusion radius of cohesive soil is smaller than that of sandy soil. The slurry pressure is positively related to the time and the standard value of foundation bed coefficient. At most positions, there is a positive correlation between the slurry pressure and the viscosity. The slurry pressure of cohesive soil is smaller than that of sandy soil. The split crack width continues to grow along with time. At most positions, the split crack width is negatively related to the standard value of foundation bed coefficient and positively related to the slurry viscosity, and the split crack width of cohesive soil is larger than that of sandy soil. Finally the comparative analysis of the calculated and field test values indicates that the difference of calculated and measured results is acceptable. Obviously, the proposed method is of high rationality.
- split grouting /
- foundation bed coefficient method /
- stress coupling effect of slurry and soil /
- process analysis

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参考文献(16)

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