Stress Distribution Rules of Interlayer in Salt Caverns Gas Storage
BAN Fansheng1, YUAN Guangjie1, ZHAO Zhicheng2
1. CNPC Drilling Research Institute, Beijing 100195, China;
2. Key Laboratory of Hubei Province for Drilling and Production Engineering; Yangtze University, Wuhan 430100, China
Abstract：The insoluble interlayer can have a major impact on the shape development of salt caverns when building salt caverns gas storage. A mechanical model of the interlayer is established and solved by bending theory of thin plates with small deflections for collapsing of interlayer in salt caverns gas storage. The stress distribution rules and collapsing conditions of the interlayer are analyzed with the mechanical model. A computing method is provided for ultimate span of the interlayer. Distribution characteristics of various stress components in the section of the interlayer are computed with engineering examples, and the collapse of position under the conditions of varying thickness of interlayer is computed. The results show that the maximum shear stress occurs in the middle plane of the fixed end of the interlayer, and the maximum normal stress occurred in the upper and lower end faces of the fixed end of the interlayer. Shear failure occurs at the fixed end of the interlayer when the maximum shear stress reaches its limit value. Tensile failure occurs at the fixed end of the interlayer when the maximum normal stress reaches its limit value. Engineering practice has proved that the greater the thickness of the interlayer, the larger the collapsing span. A theoretical basis and computing method are provided for prediction of collapsing of interlayer in salt caverns gas storage.
班凡生, 袁光杰, 赵志成. 盐穴储气库溶腔夹层应力分布规律[J]. 科技导报, 2014, 32(16): 45-48.
BAN Fansheng, YUAN Guangjie, ZHAO Zhicheng. Stress Distribution Rules of Interlayer in Salt Caverns Gas Storage. journal1, 2014, 32(16): 45-48.
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2014, Vol. 32 
