摘要
为提高强震区隧道洞口软硬围岩交接段的地震安全性,本文依托老鹰窝隧道工程洞口段,利用有限差分计算软件FLAC^(3D)进行三维动力响应分析,对全环接触注浆、全环间隔注浆两种围岩注浆抗震措施作用效果进行了对比研究。研究表明:(1)两种注浆方式均能有效减小隧道二衬结构的动力响应内力,改善隧道结构的受力特性,从而提高隧道整体的抗震性能;(2)地震荷载作用下,软岩隧道动力响应强于硬岩,且离软硬围岩交界面越近,响应越大;(3)从减小衬砌结构响应内力的角度来说,全环间隔注浆抗震性能优于全环接触注浆。研究成果可为强震区隧道洞口段抗震设防设计提供参考。
To improve the seismic safety of tunnel portal with soft and hard rock transition section,dynamic response of Laoyingwo tunnel portal section is simulated by FLAC^（3D）. Based on A comparative study on the seismic effect of two kinds of surrounding rock grouting measures is carried out,including the full circle contact grouting and full annular interval grouting. The results show that：（ 1） Both two methods can effectively reduce internal force of secondary lining and improve the stress characteristics of lining structure which will enhance the overall seismic performance of the tunnel;（ 2） Dynamic response in soft rock tunnel is stronger than that of the hard rock and the closer to the interface,the stronger the response is;（ 3） The full annular interval grouting performs better than the full contact grouting in terms of reducing the structural internal forces. The research results can provide reference for seismic design of tunnel portal section.
作者
王泽军
陈铁林
崔光耀
马军辉
张玉
WANG Zejun;CHEN Tielin;CUI Guangyao;MA Junhui;ZHANG Yu(Key Laboratory for Urban Underground Engineering of Ministry of Education,Beijing Jiaotong University,Beijing 100044,China;College of Architecture and Civil Engineering,North China University of Technology,Beijing 100144,China;Zhengzhou Engineering Co.,Ltd of China Railway Seventh Group,Zhengzhou,Henan 450052,China)
出处
《中国地质灾害与防治学报》
CSCD
2018年第4期96-102,共7页
The Chinese Journal of Geological Hazard and Control
基金
北京市自然科学基金资助项目(8161001)
关键词
隧道工程
洞口段
软硬围岩交界面
接触注浆
间隔注浆
tunnel engineering
portal section
interlace between soft and hard rock
contact grouting
interval grouting
