超前注浆小导管支护机理与效果分析

Study of support mechanism and effect of advance grouting ductile technology

首先对超前注浆小导管的支护机理进行了研究,然后以河北张石高速黑石岭公路隧道进口浅埋破碎段为例,采用FLAC三维数值模拟方法分别对不采用和采用小导管注浆时围岩的位移情况、塑性区范围进行了模拟,定量分析了小导管注浆法的加固效果.

First,the paper studies the support mechanism of advance grouting ductule technology with examples of Heishiling tunnel construction of the weathering and crushed zone of the tunnel＇s import presented,in the case of Zhangshi highway tunneling Hebei province. By the fast language analysis of continua（FLAC） Three-Dimensional Numerical simulating of the displacement condition and the plastic zone scope of the surrounding rock（without and with ductule grouting） ,a quantitative analysis of the support effect of the ductule grouting method is presented.