D-P Yield Criterion Based Elastoplastic Solution of the Circular Pressure Tunnel
(1 School of Civil and Transportation Engineering, Ningbo University of Technology, Ningbo 315211; 2 The Soft Soil Research Center in Ningbo University of Technology, State Key Laboratory of Geomechanics and Geotechnical Engineering, Ningbo 315211; 3 School of Civil Engineering, Chongqing University, Chongqing 400045; 4 College of Civil Engineering and Architecture, Guangxi University,Nanning 530004)
Abstract：
With the construction of large-scale water conservancy projects in China, many deep-buried hydraulic pressure tunnels have been built. The principal stress of tunnel lining and surrounding rock will be changed under different conditions of construction and operation for the deep buried pressure tunnel. Based on D-P yield criterion,the elastoplastic solution of the deep-buried circular pressure tunnel was derived when the first principal stress is the radial stress or tangential stress under the condition of plane strain. The research shows that the calculated values by this model were consistent with the calculated values by M-C criterion, which verifies the correctness of this model and it is more conservative compared with the calculated results by M-C criterion; radiuses of plastic zones of lining and surrounding rock will change in different stresses levels and internal water pressures; plastic zone distribution can be divided into five stages and the yield radius of lining develops faster with an increase of internal water pressure during high water pressure stage.
WANG Sui1,
2,
3 ZHONG Zuliang3 LIU Xinrong3 WU Bo1 etc
.D-P Yield Criterion Based Elastoplastic Solution of the Circular Pressure Tunnel[J] MODERN TUNNELLING TECHNOLOGY, 2019,V56(4): 74-80
2019, Vol. 56 