文档介绍：
裂隙随机分布条件下地下石油洞库水封性
评价#
平洋,王者超,李术才,薛翊国,张立**
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(山东大学土建与水利学院,济南 250061)
摘要:以我国首个大型地下水封石油洞库工程为背景,在考虑洞库围岩节理裂隙的随机分布
特征基础上,采用离散介质流固耦合理论对大型地下石油洞库水封性进行了评价。介绍了地
下水封储油洞室水封原理与水封准则。通过室内结构面剪切试验获得了结构面参数,采用
Barton-Bandis 剪胀模型对结构面参数进行了校验。根据库区节理裂隙统计结果,建立了洞
库围岩的随机节理裂隙网络模型。分析了不同水幕压力条件下洞室开挖后地下水压力分布情
况、涌水量大小和洞库围岩变形与受力情况。分析表明,在水幕压力大于或等于 75 kPa 的
条件下,洞室周围地下水压力满足水封准则;在水幕压力为 75 kPa 条件下各洞室涌水量在
~ m3/d 之间,拱顶沉降量在 16~32 mm 之间。研究结果可为地下水封石油洞库水
幕系统设计提供依据。
关键词:地下水封石油洞库;离散单元法;应力渗流耦合;随机节理裂隙;水幕压力;剪胀
模型;涌水量
中图分类号:TU443
Water seal effect evaluation of underground crude oil
storage caverns around rock mass with random joints
PING Yang, WANG Zhechao, LI Shucai, XUE Yuguo, ZHANG Li
(Civil Engineering School,Shandong University,Jinan 250061)
Abstract: Based on the joints random distribution characteristics of the surrounding rock of the
China's first large underground crude oil storage caverns, containment properties of underground
crude oil storage caverns were assessed by using flow-solid coupling theory for discrete medium.
This paper introduces water principle and water standards of underground crude oil storage
caverns. The structural plane parameters are obtained by the indoor structural plane shear test, and
structural plane parameters are checked by using Barton - Bandis shear dilatancy model.
According to the joint statistical results, random work model of the surrounding rock is
established. The groundwater pressure distribution, water inflow and surrounding rock
deformation and stress distribution are analysed after the excavation under the condition of the
different water curtain pressure. The results show that groundwater pressure around caverns meet
water standard which the water curtain pressure is greater than or equal to 75 kPa conditions.
Under the water curtain pressure of 75 kPa, water inflow rates for the caverns range from to
m3/d and crown settlements range from 16 to 32 mm. The results provide a theo