基于地震波法测定岩体弹性抗力系数

发布时间：2018-06-18 20:44

  本文选题：弹性抗力系数 + 地震波反射法　； 参考：《现代隧道技术》2017年01期

【摘要】：围岩弹性抗力系数是隧道结构设计的重要参数,其原位测试具有难度大、费用高的特点。基于此,文章提出一种根据隧道地震波反射法进行超前地质预报实测的围岩地震波波速计算其弹性抗力系数的方法。首先根据实测地震波波速计算围岩的动弹性参数,然后利用前人得出的岩体动、静弹性参数关系计算围岩的静力学参数。以此为基础计算围岩的弹性抗力系数。文章以赣龙汀州隧道为例,采用上述方法获得了该隧道Ⅲ、Ⅳ级围岩的弹性抗力系数,分别为0.54~1.19 GPa/m和0.24~7.6 GPa/m。计算数值与我国《铁路隧道设计规范》中Ⅲ、Ⅳ级围岩的弹性抗力系数吻合,这说明根据地震波反射法进行超前地质预报所获得的围岩地震波波速确定围岩弹性抗力系数是一种可行的方法。
[Abstract]:The elastic resistance coefficient of surrounding rock is an important parameter in tunnel structure design. Based on this, this paper presents a method for calculating elastic resistance coefficient of surrounding rock seismic wave velocity measured in advance geological prediction according to seismic wave reflection method of tunnel. First, the dynamic elastic parameters of surrounding rock are calculated according to the measured seismic wave velocity, and then the statics parameters of surrounding rock are calculated by using the relation of dynamic and static elastic parameters of rock mass obtained by predecessors. Based on this, the elastic resistance coefficient of surrounding rock is calculated. Taking Ganlong Ting Zhou Tunnel as an example, the elastic resistance coefficients of the surrounding rock of grade 鈪，

本文编号：2036808