Centrifugal shaking table test on dynamic response characteristics 
of tunnel entrance slope in strong earthquake area

REN Yang; LI Tian-bin; LAI Lin

doi:10.16285/j.rsm.2019.1161

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Centrifugal shaking table test on dynamic response characteristics of tunnel entrance slope in strong earthquake area

更新时间：2026-06-25

- Centrifugal shaking table test on dynamic response characteristics of tunnel entrance slope in strong earthquake area
- Vol. 41, Issue 5, Pages: 1605-1612(2020)
- 作者机构：
  
  成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川,成都,610059
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2019.1161
  CLC： U452.28
- Online First：07 July 2020，
  
  Published：2020
- 稿件说明：
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REN Yang, LI Tian-bin, LAI Lin. Centrifugal shaking table test on dynamic response characteristics of tunnel entrance slope in strong earthquake area[J]. 2020, 41(5): 1605-1612.
DOI：

REN Yang, LI Tian-bin, LAI Lin. Centrifugal shaking table test on dynamic response characteristics of tunnel entrance slope in strong earthquake area[J]. 2020, 41(5): 1605-1612. DOI： 10.16285/j.rsm.2019.1161.

摘要

强震后隧道震害调查表明，隧道洞口段的震害破坏尤其严重，需进一步加强隧道洞口段边坡动力响应方面的研究。以汶川地震灾区典型隧道洞口边坡为例，通过大型离心振动台试验，研究隧道洞口段边坡在强震作用下的动力响应特征及规律。试验研究表明：（1）在边坡坡面和坡内的加速度放大均具有显著的高程效应；隧道拱顶的加速度放大系数大于隧道其他部位；越靠近隧道洞口的加速度放大效应越明显。（2）不同振幅下坡体的加速度放大效应均十分显著，并且低振幅下的加速度响应大于高振幅下的加速度响应。（3）在维持0.25g振动加速度下不同离心荷载等级下的坡体加速度放大系数均大于2.0；但随着离心荷载的增大，加速度放大系数增长很小。（4）随着边坡高程的增大，动土压力总体呈线性降低，在相对高程为0.48时（即隧道拱顶），其动土压力响应系数最大。研究成果能为强震区隧道洞口段的抗减震设计和相关研究提供借鉴。

Abstract

The investigation of tunnel damage after strong earthquake shows that the seismic damage of tunnel entrance is quite serious

so it is necessary to further investigate the dynamic response of tunnel entrance slope. Taking the typical tunnel entrance slope in Wenchuan earthquake area as an example

the dynamic response characteristics of tunnel entrance slope under strong earthquake are studied using large centrifugal shaking table test. The experimental results show that: 1) The acceleration amplification on the slope and inside the slope has a significant elevation effect

the acceleration amplification coefficient of the tunnel arch roof is larger than that of the other parts of the tunnel

and the closer to the tunnel entrance the more obvious the acceleration amplification effect. 2) The acceleration amplification effect of the slope is very obvious for different amplitudes

and the acceleration response at low amplitude is larger than that at high amplitude. 3) Under the condition of maintaining 0.25g excitation

the acceleration amplification coefficient of slope under different centrifugal load grades is greater than 2.0

but the acceleration magnification factor is basically flat with the increase of centrifugal load. 4) With increasing slope elevation

the dynamic earth pressure decreases linearly

and the dynamic earth pressure response coefficient at the relative elevation of 0.48 (i.e.

tunnel arch roof) is the largest. Research results can provide reference for the design and research of seismic mitigation for tunnel entrance in strong earthquake area.

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