基于渗滤效应的沙层劈裂注浆扩散规律分析及其ALE算法  

Analysis of fracturing grouting diffusion in sand considering filtration effects and its ALE algorithm

作　　者：朱光轩 张庆松[1] 刘人太[1] 李术才[1] 王洪波[1] 郑卓[1] 郭焱旭 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061

出　　处：《岩石力学与工程学报》2017年第A02期4167-4176,共10页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点基础研究发展计划(973)项目(2016YFC0801604)~~

摘　　要：渗滤效应广泛存在于沙层劈裂注浆扩散过程中,并对扩散规律有重要影响,目前尚未有合理的劈裂注浆理论对其充分考虑。针对沙层劈裂注浆中的渗滤效应,采用一维渗滤模型对其进行描述,并结合平板裂隙注浆扩散模型,推导得到劈裂注浆扩散控制方程。通过与不考虑渗滤效应的劈裂扩散模型对比,揭示渗滤效应对注浆扩散的影响机制。采用有限元瞬态移动网格ALE方法对沙层劈裂注浆扩散过程进行动态模拟,模拟结果与理论研究结果相符;开展沙层劈裂注浆扩散现场试验,试验结果表明实际劈裂浆脉长度与理论模型和数值模型计算结果相近,验证了理论模型和数值模型的合理性。The filtration effect has an important influence on the fracturing grouting diffusion process in sand.At present,there is no reasonable fracturing grouting theory fully considered the filtration effect.In this paper,the filtration effect was described by the one-dimensional filtration model.A theory model of fracturing grouting diffusion in sand was established considering the plate grouting diffusion model and the one-dimensional filtration model.Equations of grout diffusion were further derived.Compared to the model without considering filtration effects,the influence mechanisms of the filtration effects on grout diffusion were revealed.The process of fracturing grouting diffusion in sand was stimulated with ALE finite element methods dynamically.The numerical solution was consistent with the theoretical solution.The field examination of the fracturing grouting diffusion in sand was carried out.The results proved that actual length of grout veins were similar with the numerical results and theoretical calculations,which verified the rationality of the numerical model and the theoretical model.

关 键 词：土力学 沙层劈裂注浆 渗滤效应 影响机制 ALE算法 

分 类 号：TU443[建筑科学—岩土工程]