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《Chinese Journal of Underground Space and Engineering》 2013-03
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Arches Selection in Primary Support for Shallow Buried Loess Tunnel with Small Interval & Unsymmetrical Pressure

Su Zhongming1,Liu Rui2(1.Shanxi Provincial Research Institute of Communications,Key Laboratory of Highway Construction & Maintenance Technology in Loess Region,Ministry of Transport,Taiyuan 030006,China; 2.Supervision Office of Construction Engineering Quality,Jiangjin District,Chongqing 402260,China)  
The problem of arches selection for primary support of loess tunnel is one of the problems in dispute that are now focused on.Based on two types of support,namely,grid and shaped steel ones,the soil displacement of characteristic points of tunnel is mainly analyzed by means of numerical simulation,in the shallow buried loess tunnels with small interval unsymmetrical pressure,with considering the plastic zone of surrounding rock and internal forces of the support.Analysis results indicate that the displacement in the grid support is slightly larger than that of the shaped steel support,which is also confirmed by the measured data;it is opposite for the internal forces,besides,the plastic zones are almost the same in the two types of support;so it is suggested that the gird support should be adopted in the design of primary support of such tunnel.
【Fund】: 山西省交通建设科技项目(11-2-18)
【CateGory Index】: U455.7
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