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Shaking table model test on failure of tunnel portal section under strong earthquake

机译：强震作用下隧道洞口段破坏的振动台模型试验

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摘要

Mountainous tunnel portal section is one of the most easily damaged parts during strong earth-quake.Failures of this part may block roads,which greatly influences the transportation of the local area after earthquake.Model tests on shaking table of tunnel portal section are carried out.A rigid testing box is adopted in the tests.The rock condition around tunnel portal section is designed rather weak as the rock in this part is often weathered and loose.A new similarity material with a main component of fly ash has been successfully made to simulate the surrounding rock.Test with a model scale of 1∶50 are designed.Slope angles are set to 35° according to the slope range limited by the rock type.By the testing results,the rule of tunnel portal failure under the condition is studied.The results can be references for other similar projects and for seismic damping measure design.
机译：山区隧道洞口段是强震中最容易损坏的部分之一，该部分的故障可能会阻塞道路，极大地影响地震后当地的交通运输。对隧道洞口段的振动台进行了模型试验。试验采用刚性试验箱，隧道门段周围的岩石条件设计较弱，因为该部分岩石经常风化和疏松，已成功制备了一种以粉煤灰为主要成分的新型相似材料模拟围岩，设计以1∶50的模型比例进行试验，根据岩石类型所限制的坡度范围将坡度角设置为35°。根据试验结果，该条件下的隧道洞口破坏规律为研究结果可为其他类似项目和减震措施设计提供参考。

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  • 来源
  • 会议地点 Shanghai(CN)
  • 作者

    X.Zhao; T.B.Li; L.J.Tao; S.Hou;

  • 作者单位

    Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education,Beijing University of Technology, Pingleyuan, Chaoyang District, Beijing, China;

    State Key laboratory of Geohazard Prevention and Geoenvironment Protection,Chenghua District, Chengdu City, China;

    State Key laboratory of Geohazard Prevention and Geoenvironment Protection, Chenghua District, Chengdu City,China;

    Institute for Geotechnical Engineering and Underground Construction, Beijing University of Technology,Pingleyuan, Chaoyang District, Beijing;

    Institute for Geotechnical Engineering and Underground Construction, Beijing University of Technology,Pingleyuan, Chaoyang District, Beijing;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 岩石学;
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