期刊论文

Study on dynamic response characteristics of rock slope with small spacing tunnel under earthquakes

中文

自然灾害学报

1004-4574

2017

26

5

130-139

10.13577/j.jnd.2017.0515

(51204215,51404309):国家自然科学基金 (51204215,51404309):National Natural Science Foundation of China

本校为第一机构

采用有限元分析软件建立一个通过大型振动台模型试验验证的边坡动力数值分析模型,研究了地震作用下含小净距隧道岩石边坡的动力响应规律,探讨了隧道结构对边坡动力响应规律的影响。结果表明:1)边坡加速度峰值放大系数沿坡面向上呈现出先减小后增大的非线性变化特征,存在临空面放大作用,边坡会改变输入地震波的频谱成分,对高频段地震波存在滤波作用,对低频段地震波存在放大作用;2)因小净距隧道的存在,含小净距隧道边坡的坡面加速度分布较无隧道边坡表现出明显的非线性高程特性,其坡体最大水平和竖向位移总体上小于无隧道边坡;3)强震作用下坡顶和结构面附近水平位移最大,两隧道中夹岩处及偏压侧隧...

In order to study the dynamic characteristics of rock slope with small spacing tunnel under seismic action and the influence of tunnel structure, a dynamic numerical simulation model of soil slope was established, and the validity of simulation is validated with a shaking table model test. The results show that: 1) Upward along with the slope surface, the acceleration amplification coefficients show a nonlinear variation which increases at first and then decreases. The input seismic waves are affected by surface amplification of the slope, and ...