摘要
为研究动水条件下富水砂层中注浆浆液的扩散规律,研制了一套由试验主体系统、注浆系统以及量测系统组成的注浆试验模型,同时针对浆液扩散范围检测提出了一种新的方法——电阻率法。研究发现,试验过程中注浆压力与注浆速率关联性较强,动水条件下浆液呈椭球体扩散,且由于重力及上部水流的作用,椭球体的重心在注浆出口下方,注浆有效地改善了富水砂体的物理力学性质。采用电阻率法对注浆扩散范围进行检测具有良好的应用效果,利用电阻率法得到的浆液扩散范围与开挖后结石体的边界基本吻合,表明电阻率法作为检测动水富水砂层中注浆范围的方法是可靠的。
In order to study the diffusion law of grouting slurry in the water-rich sand layer under flowing water conditions, a grouting test model consisting of a main test system, a grouting system, and a measurement system was developed. And for detecting the diffusion scope of the grouts, a new resistivity method was proposed. It is found that the relationship between grouting pressure and grouting rate during the test is strong. Under hydrodynamic conditions, the grouting slurry diffuses elliptically. Due to gravity and the effect of the upper water flow, the center of gravity of the ellipsoid is below the grouting outlet, and the grouting effectively improves the physical and mechanical properties of water-rich sand bodies. At the same time, the resistivity method has a good application effect on the detection of grouting diffusion range. The range of slurry diffusion obtained by the resistivity method is basically consistent with the boundary of the stone body after excavation, indicating that the resistivity method is reliable for detection of grouting range in dynamic water-rich sand layer.
作者
杨晓桐
孙文景
刘涛
寇海磊
杨忠年
王迪
YANG Xiaotong;SUN Wenjing;LIU Tao;KOU Hailei;YANG Zhongnian;WANG Di(Shandong Provineial Key Laboratory of Marine Environment and Geological Engineering,Oeean University of China,Qingdao 266100;Laboratory for Marine Geology,Qingdao National Laboratory for Marine Scienee and Technology,Qingdao 266061;Qingdao University of Technology,Qingdao 266520;CCC First Harbor Engineering Co.,Ltd.,Qingdao 266000)
出处
《现代隧道技术》
EI
CSCD
北大核心
2018年第5期216-222,228,共8页
Modern Tunnelling Technology
基金
国家自然科学基金资助项目(41702320,416722723).
关键词
动水条件
富水砂层
注浆
扩散范围
电阻率法
Dynamic water condition
Water-rich sand layer
Grouting
Diffusion scope
The resistivity method
