WIS新型注浆材料在隧道岩溶管道中扩散规律试验研究  

Experimental Study on Diffusion Characteristics of WIS New Grouting Material in Tunnel Karst Conduit

作　　者：王振军 张庆松[2] 惠冰 刘人太[2] 张旭 WANG Zhenjun;ZHANG Qingsong;HUI Bing;LIU Rentai;ZHANG Xu(Shandong Transportation Institute,Jinan 250104;Institute of Geotechnical and Underground Engineering,Shandong University,Jinan 250061)

机构地区：[1]山东省交通科学研究院,济南250104 [2]山东大学岩土与地下工程研究院,济南250061

出　　处：《现代隧道技术》2024年第3期202-211,共10页Modern Tunnelling Technology

基　　金：国家自然科学基金资助项目(52021005,52378352);国家重点研发计划资助项目(2022YFB2302204-05-4);济南市高校二十条资助项目(202228071)。

摘　　要：为探究WIS新型注浆材料在隧道岩溶管道中的扩散规律,针对隧道岩溶管道涌水特征,搭建可视化岩溶直管道注浆模拟系统,基于正交试验研究3种粒径的WIS新型注浆材料在动水注浆下管道直径、动水流速、注浆速率对浆液扩散封堵距离的影响规律,并提出浆水速率比θ对浆液扩散规律的作用机理。选取典型工况探讨注浆封堵体的特征,对比分析注浆扩散过程中压力场、流速场等多物理场的动态演化特征。结果表明:动水流速是影响浆液扩散封堵距离的外部主控因素;浆液在有效扩散范围内顺水扩散封堵距离与浆水速率比θ呈负相关关系;注浆扩散过程中动水流速衰减速率呈慢—快,压力增长速率呈慢—快—慢变化趋势直至实现封堵;浆液未实现封堵时动水流速呈先降低后升高,压力呈先升高后降低变化趋势。In order to explore the diffusion law of WIS new grouting material in tunnel karst conduit,a visualized simulation system for grouting in karst straight conduit was built based on the characteristics of water inflow in tunnel karst conduit.Orthogonal experiments were conducted to study the influence of pipe diameter,water flow velocity,and grouting rate on the diffusion and plugging distance of slurry under dynamic water grouting for three particle sizes of WIS new grouting material.The mechanism of slurry diffusion law under different slurry/water rate ratios(θ)was proposed.Typical conditions were selected to discuss the characteristics of grouting plugging body,and the dynamic evolution characteristics of multiple physical fields such as pressure field and velocity field during grouting diffusion process were compared and analyzed.The results show that the dynamic water flow velocity is the main external control factor affecting the diffusion and plugging distance of slurry.The plugging distance of slurry diffusion along the water flow direction within the effective diffusion range is negatively correlated with the slurry/water rate ratioθ.During the grouting diffusion process,the attenuation rate of dynamic water flow velocity and the rate of pressure increase show a slow-fast trend until plugging is achieved.Before the slurry is fully plugged,the dynamic water flow velocity decreases first and then increases,while the pressure increases first and then decreases.

关 键 词：岩溶管道 WIS新型注浆材料 动水注浆 正交试验 扩散规律 

分 类 号：U454[建筑科学—桥梁与隧道工程]