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《Rock and Soil Mechanics》 2013-02
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Study of footage optimization method of tunneling cycle under complicated conditions

LI Da1,2,LI Yong-sheng2,LUO Zhan-fu2(1.School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China; 2.Scientific Research Institute of China Railway Tunnel Group,Luoyang,Henan 471000,China)  
How to choose a reasonable footage of tunneling cycle in complicated conditions has been a problem in tunnel construction.Based on the existing research results,a spatial relational expression about tunnel excavation is proposed,and a calculation method which based on the on-site displacement monitoring data is also work out.Combined with on-site construction conditions and monitoring data about Erlang fault-rupture zone at #9 work area of Guanjiao tunnel,the spatial effect expression of displacement during tunneling is established,results indicate that the spatial relational expression can reflect the displacement change with the changes of time and space.On the basis,the methods of spatial effect analysis and footage optimization of tunneling cycle about tunnel excavation in the soft rock with fault-rupture zone are achieved,and the footage of tunneling cycle in several large fault-rupture zones is optimized.Practice has proved that the method is feasible.Advantage and application scope of the method are analyzed too.
【Fund】: 铁道部科技研究开发计划项目(No.2007G035)
【CateGory Index】: U455.4
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