平行裂隙条件下水幕孔间距与压力对地下储油洞库水封性影响分析  

Analysis of Influence of Borehole Spacing and Water Pressure of Water Curtain System on Water Sealing Effect of Underground Oil Storage Cavern under Parallel Fissures

作　　者：赵少龙[1] 张乐文[1] 许振浩[1] 林鹏[1] 何树江 

机构地区：[1]山东大学岩土与结构工程研究中心,山东济南250061

出　　处：《隧道建设》2016年第12期1478-1486,共9页Tunnel Construction

基　　金：国家自然科学基金(51509147);山东省优秀中青年科学家奖励基金(BS2014NJ004);中国博士后科学基金资助项目

摘　　要：地下水封石油储库水幕系统的布置方式及参数选取对储库的储油效果影响很大。采用数值模拟的方法建立地下水封石油储库的三维模型,分析裂隙对渗流场的影响,研究平行裂隙条件下不同间距和压力的水幕孔对水幕系统的影响。结果表明:有裂隙存在时,水幕系统对储油洞室的影响更为明显,裂隙有利于围岩内渗流压力传递;适当缩小水幕孔间距、加大水幕孔压力,有利于形成"群孔效应",在洞室周围形较高的稳定压力,且水幕孔压力变化引起的洞室周围压力变化较水幕孔间距明显,可优先选用加大水幕孔压力的方法来提高水幕系统的水封效果。The borehole spacing and water pressure of water curtain system have a significant influence on water sealing effect of underground oil storage cavern. The numerical model of underground oil storage cavern is established; the influence of parallel fissure on seepage field is analyzed; the influence of borehole spacing and water pressure of water curtain system on water sealing of underground oil storage cavern under parallel fissures is studied. The study results show that： 1） The influence of water curtain system on oil storage cavern and that of parallel fissures on transmission of seepage pressure in surrounding rocks are obvious. 2） The superposition effect can be improved by reducing borehole spacing and increasing water pressure rationally. 3） The influence of water pressure on water curtain system is larger than that of borehole spacing on water curtain system; as a result,increasing water pressure is superior to reducing borehole spacing in terms of improving water sealing effect of underground oil storage cavern.

关 键 词：地下水封石油储库 平行裂隙 渗流场 水幕孔 群孔效应 

分 类 号：U45[建筑科学—桥梁与隧道工程]