岩土力学Issue(11)：3171-3179,9.DOI:10.16285/j.rsm.2015.11.018
多孔介质中水泥浆三维锋面特征研究
Characteristics of three-dimensional slurry frontal surface in porous media
摘要
Abstract
Deep filtration effect widely exists and plays an important role in the process of permeation grouting in porous media. Based on the mass conservation equation, linear filtration law and seepage continuity equation as well as Darcy law, a theoretical model is developed for three-dimensional slurry frontal surface. The migration of the slurry frontal surface migration and the variation of the permeability coefficient of the deposition layer are examined based on in-situ grouting test;the measured values are compared with the theoretical ones. It is shown that the permeability coefficient varies as the frontal surface migration. At the constant grouting pressure, the deep filtration effect is more significant, and the slurry diffusion distance is shorter when the water-cement ratio is smaller. At the same diffusion distance, the permeability coefficient of the deposit layer above grouting point source is larger than that below the grouting point source, due to the influence of gravity effect. The grouting diffusion distance and the permeability coefficient of the deposit layer at a specified point are positively correlated with the water cement ratio. The above result has practical bearing, in which it can help construction designs.关键词
多孔介质/深层渗滤效应/渗透注浆/运移机制/渗透系数Key words
porous medium/deep filtration effect/permeation grouting/migration mechanism/permeability coefficient分类
建筑与水利引用本文复制引用
冯啸,李术才,刘人太,张乐文,王健,王慧涛,郑卓..多孔介质中水泥浆三维锋面特征研究[J].岩土力学,2015,(11):3171-3179,9.基金项目
国家自然科学青年基金（No.51309146）；山东大学自主创新基金（No.2012GN011）。@@@@Project supported by the National Natural Science Foundation of China (Grant No.51309146) and the Independent Innovation Fund of Shandong University (No.2012GN011) （Grant No.51309146）
