NUMERICAL SIMULATION ON CONSTRUCTION PROCESS OF SALT-CAVE NATURAL GAS UNDERGROUND STORAGE AND ITS CASING DEFORMATION
With ABAQUS finite element software, 3-dimensional viscoelastoplastic Finite Element analysis was done for excavation of rockmass of a natural gas underground storage. Stress variation and deformation occurred during the excavation process were calculated and analyzed. Deformation of the casing with which water is pumped in and out was calculated. Principal results include: 1 ) Stress field and displacement distribution of rockmass caused by solution mining were presented as well as a curve of rock mass displacement versus z-coordinates for the rock around casing; 2) a practical curve of viscoplastic constitutive model of rockmass with reference to the form requirements of ABAQUS software was given out; 3 ) Possible plastic area was predicted, and the estimation on the stability of the storage rockmass structure was given out. Numerical results indicate that the self-bearing system which is characterized by compressive arch has been formed around the storage space after 3 years solution mining construction. The design of the underground storage is reasonable and practical. However it is necessary to adopt reasonable measure to enhance the lower section of casing as well as to reduce the pulling effect of the rockmass acting on the casing.
Natural Gas Underground Storage Rockmass Casing Viscoelastoplasticity ABAQUS
XINPU SHEN GUOXIAO SHEN JIHANG LIU
College of Architectural Engineering, Shenyang University of Technology, Shenyang, 110023, China School of Naval Architecture,Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200
国际会议
第三届中日岩土工程研讨会(Proceedings of the 3rd Sino-Japan Geotechnical Symposium)
重庆
英文
507-514
2007-11-05（万方平台首次上网日期，不代表论文的发表时间）