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工程力学  2013 

注取油循环荷载作用下地下水封油库运营性能评价

DOI: 10.6052/j.issn.1000-4750.2012.08.0612

Keywords: 地下水封油库,循环荷载,花岗岩,岩石疲劳模型,稳定性,水封性,有限单元法

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Abstract:

以我国首个大型地下水封油库工程为背景，采用理论分析和数值模拟等方法评价了注取油循环荷载作用下该油库运营期的稳定性与水封性。针对岩石疲劳力学特性，在常规运动硬化疲劳力学模型基础上，提出可考虑平均主应力影响的岩石疲劳力学模型；编写用户子程序，将所提模型嵌入有限元分析软件，实现了循环荷载作用下地下水封油库运营性能评价。评价过程中选取了同步注取和异步注取两种工况，从围岩稳定性和水封性两方面对洞库运营性能进行了分析评价。分析结果显示：同步注取石油对库区围岩拱顶沉降影响较大，异步注取石油对库区围岩水平收敛影响较大；异步注取条件下水位下降和涌水量均比同步注取条件大，但差异不大。两种工况下洞库运营期间总体稳定性和水封性均能保持良好。

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