大坝基岩单裂隙灌浆流固耦合模拟研究

发布时间：2018-03-02 02:02

本文关键词： 单裂隙灌浆参数敏感性流固耦合三维离散元方法数值模拟　出处：《天津大学学报(自然科学与工程技术版)》2017年10期 　论文类型：期刊论文

【摘要】：单裂隙是构成裂隙网络的基本元素,对浆液在单裂隙中扩散规律的研究是研究浆液在裂隙网络中扩散的基础.目前灌浆数值模拟研究主要集中在特定参数的取值对数值模拟结果的影响以及数值模拟与模型试验结果的对比,且在考虑流固耦合作用对实际灌浆的影响时均采用二维模型.本文通过构建三维单裂隙特征模型,以对实际灌浆效果影响显著的灌浆压力、裂隙宽度和裂隙倾角等3个因素为研究对象,基于三维离散元方法进行了考虑流固耦合作用的单裂隙灌浆数值模拟参数的敏感性分析.研究结果表明:流固耦合作用对于数值模拟结果的影响随灌浆压力的增大而增大,随裂隙宽度的增大而减小,基本上不会随裂隙倾角的变化而改变.以上结论对于指导基岩裂隙灌浆具有一定的理论和现实意义.
[Abstract]:A single fracture is a basic element of fracture network, research on diffusion law of slurry in single fracture is based on the diffusion of the grout in the crack network. The numerical simulation of grouting effect value mainly focused on the specific parameters of the numerical simulation results and numerical simulation comparing with model test results, and considering the flow the coupling effect of practical grouting is adopted by two-dimensional model. By constructing three-dimensional fracture model, by grouting pressure effect on actual grouting effect, crack width and crack angle and other 3 factors as the research object, the three-dimensional discrete element method based on the sensitivity analysis of parameters of Single Fissure Grouting flow numerical simulation solid interaction into account. The results show that: the fluid solid coupling effect on the numerical simulation results with the increase of grouting pressure increases with crack width. The above conclusions are of theoretical and practical significance for guiding bedrock fracture grouting.

【作者单位】：天津大学水利工程仿真与安全国家重点实验室;
【基金】：国家自然科学基金资助项目(51439005,51409186,51339003)~~
【分类号】：TV223.4

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