Splitting Criterion of Grouting Bore-hole Wall and Study on Numerical Simulation of Crack Propagation
The situation that the grouting borehole doesnt intersect with natural fractures of rock masses is often met in practical grouting project.Hence, its very necessary to discuss whether the rock masses around borehole will split under the grouting pressure and the corresponding splitting orientation.After the splitting crack finishes propagation, we can estimate whether it will penetrate with original fractures, and its favorable for grouting theory analysis and numerical simulation and so on.According to this, the splitting criterion and splitting orientation are proposed with and without considering ground stress, respectively.In the meantime, under the situation of splitting, the singularity of crack-tips stress field is simulated by 6 nodes singular isoparametric element through secondary development of large-scale finite element analysis software-ANSYS.The stress intensity factor is introduced and the propagation of the splitting crack is simulated to obtain the final propagation length, which has significant guiding meaning to grouting theory and the practical grouting projects.
grouting pressure ground stress split crack propagation stress intensity factor numerical simulation Bingham grouts pressure gradient plug flow region fracture propagation simulation
SU Pei-li GU Shuan-cheng
College of Architecture and Civil Engineering,Xian University of Science and Technology,Xian,China
国际会议
上海
英文
1411-1414
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）