期刊
COMPUTERS AND GEOTECHNICS
卷 68, 期 -, 页码 147-160出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2015.03.013
关键词
Rock salt cavern; Nonlinear FEM; Stability evaluation; Failure analysis; Plastic complementary energy; Unbalanced force
类别
资金
- National Basic Research Program of China [2009CB724604, 2015CB057904]
To perform a stability evaluation of underground gas storage caverns, the strength reduction finite element method is introduced into deformation reinforcement theory (DRT). The stability criterion of gas storage in caverns is established based on the K similar to Delta E curve, where K is the strength reduction factor (SRF) and Delta E is plastic complementary energy (PCE). With respect to the state of instability, PCE quantitatively indicates the global stability of gas storage caverns, whereas the unbalanced force (UF) clearly specifies the local failure position and failure mode of gas storage caverns. A comparison between the results of geo-mechanical model testing and numerical simulation verifies the correlation between the UF and failure. DRT is applied to the stability evaluation and failure analysis of a gas storage double cavern, as well as the projected performance of rock salt gas storage caverns. (C) 2015 Elsevier Ltd. All rights reserved.
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