Abstract：For two types of quick setting slurry which are frequently used in dynamic grouting projects, that is, C-S slurry and GT-1 slurry, model tests on crack dynamic grouting with quick setting slurry were carried out. Grouting diffusion laws of quick setting slurry, including slurry diffusion pattern, grouting pressure field distribution, retention rate of slurry and variation law of dynamic flow, were studied, and applicability of C-S slurry and GT-1 slurry in dynamic grouting projects was compared and analyzed. Results show that: dynamic flow may remarkably affect the slurry diffusion process, and the downflow diffusion may significantly differ from the upflow diffusion. In the early stage of grouting process, the slurry diffusion pattern is asymmetric ellipse and the length of long axis of half ellipse in upflow is smaller than that in downflow. In the later stage of grouting process, the slurry diffusion pattern appears to be “U”. When the dynamic flow is slow, both C-S slurry and GT-1 slurry can maintain high retention rate of slurry. With the increase of flowing speed, however, the retention rate of slurry may be significantly reduced. Grouting pressure may decrease nonlinearly with the distance to the axis of grouting role, and the influence scope of grouting is limited. GT-1 slurry shall be superior to C-S slurry in dynamic grouting projects in those aspects such as grouting diffusion range, dispersion resistibility of dynamic flow, water blocking efficiency, and so on.
刘人太 张连震 张庆松 孙子正 郑卓 王洪波 张世杰. 速凝浆液裂隙动水注浆扩散规律模拟试验[J]. 土木工程学报, 2017, 50(1): 82-90.
Liu Rentai Zhang Lianzhen Zhang Qingsong Sun Zizheng Zheng Zhuo. Model test on quick setting slurry diffusion law of crack grouting with dynamic water. 土木工程学报, 2017, 50(1): 82-90.
