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《Chinese Journal of Underground Space and Engineering》 2005-05
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Stability of Rockmass between Main Tunnel and Sub-tunnels of Underground Power Houses at Longtan Hydro-power Station

YANG Lin-de~1,DENG Tao~(1,2),CHEN Hai-jun~1(1 Department of Geotechnical Engineering of Tongji University,Shanghai 200092,China;2.Lanzhou University,Lanzhou 730000,China)  
The Underground Power Houses of Longtan Hydro-power Station,as a large group Underground tunnels,are located in steep stratified rockmass with many faults and joints parallel to the bedding.Based on the factual geological conditions,a 3-D elasto-plastic numerical simulation is carried out for excavation and supporting.The calculation results show that the deformation of the rockmass between main tunnel and sub-tunnels,as the primary area with stress relaxation and plastic zones,is larger than that in any other areas and it is of obvious asymmetry.The reinforcement project is effective and safe.The obtained results are suitable to reference in engineering.
【CateGory Index】: TV223
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