工程地质学报2023，Vol.31Issue(6)：2060-2070,11.DOI:10.13544/j.cnki.jeg.2021-0637
考虑渗滤效应的全风化花岗岩体脉动注浆扩散规律
DIFFUSION MECHANISM OF PULSATING GROUTING IN COMPLETELY WEATHERED ALTERED GRANITE CONSIDERING INFILTRATION EFFECT
摘要
Abstract
Although pulsating grouting has been used as a process for anti-seepage reinforcement treatment of loose strata,the diffusion law of slurry under pulsating pressure is still unclear.Based on the theoretical model of pulsa-ting grouting,the slurry transport equation considering the percolation effect is derived.The numerical simulation program of pulsating grout diffusion considering the percolation effect is obtained by relying on COMSOL Multiphys-ics platform and Richards equation,combined with MATLAB secondary development.The pulsating and steady pressure grouting simulation device is self-designed to compare the slurry diffusion percolation of pulsating grouting and steady pressure grouting.The process of pulsating grouting on the formation mutual coupling is calculated by u-sing the numerical simulation to construct the pulsating cycle pressure variation model.Through the mutual verifica-tion of the above methods,the diffusion law of Bingham fluid in sandy soil under the control of pulsating grouting pressure is revealed by considering the percolation effect.The results show that in sandy soils,steady pressure grou-ting is easy to split and form slurry veins,diffuse percolation siltation and uncontrollable slurry diffusion.The diffu-sion of slurry under pulsating pressure control can form an effective reinforcement circle and slurry bubble with wide percolation range.The trends of slurry diffusions obtained from theoretical calculation,indoor test and numerical simulation are consistent.The slurry diffusion measured by the test and the slurry diffusion calculated by theoretical and numerical simulation verify that the slurry diffusion under pulsation pressure control is more controllable and can form a more uniform diffusion range.The research results can provide strong guidance for pulsating grouting an-ti-seepage reinforcement,numerical simulation and engineering practice.关键词
渗滤效应/全风化花岗岩/扩散规律/脉动注浆/"浆-土"耦合Key words
Seepage effect/Completely weathered granite/Diflusion law/Pulsating grouting/Slurry-soill cou-pling分类
建筑与水利引用本文复制引用
窦金熙,张贵金,蒋煌斌,匡楚丰,张熙..考虑渗滤效应的全风化花岗岩体脉动注浆扩散规律[J].工程地质学报,2023,31(6):2060-2070,11.基金项目
国家自然科学基金项目(资助号:51279019),中国电力投资集团公司重大科技计划项目(资助号:2011-036-WLDKJ-X).This research is supported by the National Natural Science Foundation of China(Grant No.51279019)and Major Science and Technology Program of China Power Investment Corporation(Grant No.2011-036-WLDKJ-X). （资助号:51279019）
