节理裂隙岩体注浆渗透模型分析  

Model Analysis of the Grouting Seepage in the Jointed and Fractured Rock Mass

作　　者：许万忠[1] 潘进兵 周治平 孙绍飞[3] 

机构地区：[1]昆明理工大学国土资源工程学院,云南昆明650093 [2]云南省地质工程勘察设计研究院,云南昆明650041 [3]云南省地矿局第二水文地质工程地质大队,云南昆明675000

出　　处：《中国铁道科学》2010年第3期47-51,共5页China Railway Science

基　　金：高等学校博士学科点专项科研基金资助项目(20060533071);湖南省研究生创新基金资助项目(1343-74236000014)

摘　　要：在分析岩体注浆作用的物理机制基础上,通过建立浆液在节理中的渗透概化模型,分析浆液渗透规律,研究注浆对节理岩体的加固效应。研究表明:岩体注浆混合结构形成"注浆岩桥"和"注浆岩楔",使得节理面的裂隙损伤得以弥补,与原节理结构相比,其抗剪强度和抗剪刚度得到大幅提高;将注浆视为在平行板中渗流时,从注浆孔到渗流边界,注浆压力服从线性递减分布规律,且在渗流场中等压线和流线呈均匀网格形态;将注浆视为柱面扩散渗透时,从注浆孔到注浆边界,岩层中的渗透压力坡降按对数关系分布,渗流场中等压线为1组同心圆,流向线为1组径向射线,而且愈靠近注浆孔处,等压线和流线越密集。In order to study the reinforcement effect of grouting to the joint rock mass,firstly,the physical mechanism of grouting was analyzed,then the seepage theoretical model was founded for grouting in joint,and the seepage flow discipline was analyzed.The studies show that the compound structure of grouting and rock mass forms the structure of ＂grouting rock bridge＂ and ＂grouting rock wedge＂,which can amend the damage of joint rock mass.When compared with the initial joint structure,the shear resistance strength and stiffness of grouting rock mass are greatly improved.When grouting flows in the flat plane,the grouting pressure decreases in the linear form from the grouting hole to the boundary,while in the seepage field,the isobar and flow lines exhibit the uniform grid shape.When grouting flows in the form of cylinder,the grouting pressure distributes in the form of logarithm from the grouting hole to the boundary,while the isobar in the seepage field shows the concentric circles form,flow lines show the radial form,and the closer of distance from the grouting hole,there exhibits the more dense of the isobar and flow lines.

关 键 词：节理岩体 岩体加固 注浆 渗透 模型 

分 类 号：TU457[建筑科学—岩土工程]