连拱隧道围岩位移预测方法研究

Study on predicting way of surrounding displacement of double-arch tunnel

连拱隧道开挖会引起围岩变形,围岩变形超过一定的允许值将给隧道的稳定性带来危害,因而,对围岩变形允许值及预测方法的研究,是目前非常重要的课题。本文从围岩变形相似材料模拟实验数据、现场监测位移的数值分析,得到隧道围岩变形的位移允许值及围岩位移的预测方法,并在一些工程实例的预测中得到验证。

Surrounding rock will be deformed because of double-arch tunnel tunneling.When surrounding rock deformation exceeds critical deformation value,it will bring dengerous at stablility.So it is very important to study on critical deformation value of surrounding rock deformation and predicting way.This paper made numerical analysis through equivalent material simulated experiment and monitoring measure data and got critical deformation value and predicting way of surrounding rock deformation.The way and critical deformation value have been tested and verified.