摘要
以某海岛地下水封油库项目为工程依托,基于达西定律和溶质运移相关理论,利用有限元软件COMSOL分析在不同设计方案下洞室渗流场的变化情况,对洞室的水封安全性做出评价,并研究了库区海水入侵的发展程度。研究表明:该项目需要设置水平水幕,且水平水幕的设计压力值不应小于0.2 MPa,主洞室埋深变化对水封性影响较小,建议埋深为-45 m;在主洞室全开挖未储油的情况下,海水会入侵至主洞室内,呈现先快后慢、从主洞室底部侵入的特点。
Based on the theory of Darcy′s law and solute transport,this paper took a groundwater-sealed oil depot project on a certain island as the engineering support and conducted numerical simulation research using COMSOL finite element software to analyze the variations in seepage field in caverns under different design schemes.The water-sealed safety of the cavern was evaluated.The development degree of seawater intrusion in the reservoir area was explored.The research indicated that the project required the installation of a horizontal water curtain,and the design pressure value of the horizontal water curtain should not be less than 0.2 MPa.The variation in the depth of the main cavern had a small impact on the water seal,and the recommended buried depth was-45 m.When the main carvern was fully excavated without oil storage,seawater would intrude into the caverns,with seawater intrusion showing a pattern of rapid intrusion followed by gradual intrusion,entering from the bottom of the main cavern.
作者
彭益
张文
王汉勋
张彬
孙哲
PENG Yi;ZHANG Wen;WANG Hanxun;ZHANG Bin;SUN Zhe(School of Civil Engineering and Water Resources,Qinghai University,Xining 810016,Qinghai,China;School of Engineering and Technology,China University of Geosciences(Beijing),Beijing 100083,China;Technical Innovation Center of Major Engineering Geological Safety Risk Prevention and Control Engineering of Ministry of Natural Resources,Beijing 100083,China)
出处
《隧道与地下工程灾害防治》
2024年第1期94-104,共11页
Hazard Control in Tunnelling and Underground Engineering
基金
青海省重点研发与转化计划资助项目(2023-QY-209)
关键词
地下水封油库
数值模拟
渗流场
海水入侵
underground water-sealed oil storage
numerical simulation
seepage field
sea water intrusion