老鹰山隧道拱顶下沉建模与监测比对分析
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摘要
隧道监控量测中拱顶下沉是重要的必测项目之一。根据隧址区不同围岩性质及围岩级别确定参数预计算出围岩最终变形十分重要,对隧道动态设计预留变形量具有指导意义。依托老鹰山隧道为案例,对隧道拱顶下沉项目通过有限元正分析软件进行建模分析,计算围岩受力及最终位移。通过对应实际监控量测的数据利用回归分析法验证,并比对有限元正分析计算最终位移与通过实际监测数据得出的最终位移,得出结论,为今后类似隧道拱顶下沉项目提供借鉴作用。
Vault subsidence is one of the most important items in tunnel monitoring and measurement. It is very important to predict the final deformation of surrounding rock according to the different properties of surrounding rock and the determination parameters of surrounding rock grade in the tunnel site area,which is of guiding significance to the reserved deformation of tunnel dynamic design. Based on Eagle Mountain Tunnel as an example,this paper carries out modeling analysis on the tunnel vault subsidence project through finite element positive analysis software to calculate the stress and final displacement of surrounding rock. The data corresponding to the actual monitoring measurement are verified by regression analysis method,and the final displacement calculated by finite element positive analysis is compared with the final displacement obtained by the actual monitoring data,and the conclusion is drawn. It can provide reference for similar tunnel vault sinking projects in the future.
Vault subsidence is one of the most important items in tunnel monitoring and measurement. It is very important to predict the final deformation of surrounding rock according to the different properties of surrounding rock and the determination parameters of surrounding rock grade in the tunnel site area,which is of guiding significance to the reserved deformation of tunnel dynamic design. Based on Eagle Mountain Tunnel as an example,this paper carries out modeling analysis on the tunnel vault subsidence project through finite element positive analysis software to calculate the stress and final displacement of surrounding rock. The data corresponding to the actual monitoring measurement are verified by regression analysis method,and the final displacement calculated by finite element positive analysis is compared with the final displacement obtained by the actual monitoring data,and the conclusion is drawn. It can provide reference for similar tunnel vault sinking projects in the future.
引文
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[2]刘志楠,李明亮,鲍大春.基于免棱镜全站仪在牟尼沟隧道监控量测中的应用[J].公路交通科技,2009(9):300-302.
[3]刘志楠,于海龙.基于有限元正分析在东山隧道监控量测中的应用[J].工程与建设,2018(6):823-825.
[4]朱国光,李习平.国家高速公路网G5615,G8013高速公路云南省蒙自至文山至砚山段高速公路第2合同段两阶段施工图设计[Z].昆明:中国公路工程咨询集团有限公司,2014.