岩溶隧道裂隙岩体力学特征及处治技术研究

Karst Tunnel Rockmass Mechanics Characteristics and Law of Development

通过理论分析、地质勘测和工程实例的研究方法,分析岩溶裂隙岩体的力学特征,确定裂隙岩体的发育特征,找到合适的注浆方案,为复杂地质条件下隧道工程设计、施工提供理论指导和技术支持,并取得以下结论:(1)通过理论分析,并假设岩体为各向同性和服从库伦定律的基础上,利用σ_1-σ_3坐标面上的岩块和裂隙面的库伦强度曲线的位置关系来研究岩体强度和破坏方式,并分类型阐释了含一条和多条裂隙情况下的裂隙岩体的力学效应。(2)通过对齐岳山隧道的地质勘测和TSP超前地质预报,分析裂隙的特征,提出采用注浆处理的技术路线,并提出了"注浆堵水,逐渐排水减压"的处治原则,采取分批次注浆的注浆方法,结合钻孔检测的方法,结果显示取得了很好的效果。

Through theoretical analysis, analysis of mechanical characteristics of karst fractured rock, determined the develop- mental features of fractured rock, find the suitable grouting scheme, design, for complex tunnel engineering the geological conditions of construction to provide theoretical guidance and technical support, and achieved the following conclusions： （1） Through theoretical anal- ysis, and hypothesis for isotropic rock mass and obey the coulomb＇ s law, on the basis of using sigma σ1-σ3 sigma coordinate coulomb strength curve of rock and fracture surface on the surface of the position relationship to study the rock mass strength and failure mode, and illustrates the point type contains one or more of fractured rock mass mechanics effect of fracture cases. （2） Through the Mountain Qiyue Tunnel＇ s geological surveying and TSP Advance Geological Prediction and characteristics of fracture analysis, put forward using grout- ing technology route, and put forward the principles＂ Grouting water plugging, gradual drainage decompression＂ , take batches Grouting grouting method, combined with borehole detection method. The results show that good results have been achieved.