ANALYSIS OF VISCO-ELASTIC STRESS AND DEFORMATION OF SURROUNDING ROCKS FOR SHALLOW TUNNEL UNDER GROUND LOAD
Fang Yingguang;Sun Jun( Guang dong University of Technology, Guangzhoy 510090)( Tongji Uuiversity, Shanghai 200092)
The visco-elastic analytic solution of stress and deformation is given forsurrounding rock of shallow circular tunnel under ground load. The Laplacetransformation of visco-elastic solution is obtained from corresponding elastic one with theaid of correspondence principle. The solution is first expressed as the sum of multiplesolutions in each load coordinate and is then converted into the form of dual infinite seriesof a local coordinate system by addition formulas to satisfy boundary conditions. Thenumerical results of stress and displacement of surrounding rocks are presented and theinfluence of ground load on stress is discussed.
【CateGory Index】： U451.2