摘要
为研究地下水封洞库设计中设计地下水位高程、水幕系统高程、主洞室高程等“三大高程”的确定方法,依托某洞库工程,从水封效果的角度出发,提出“三大高程”确定方法,并进行水封性评价。分析结果表明:设计地下水位一般取区域性地下水排泄基准面;水幕系统及主洞室的设计高程需要综合考虑水封效果、洞室上方形成的“水盖层”厚度、洞室围岩渗水量等进行确定;参照依托工程建立的计算模型,设计地下水位高程与水幕系统高程、水幕系统高程与主洞室高程均相差25 m,数值模拟结果表明其具有良好的水封效果,小幅度调整这些参数,也能保证水封性。“三大高程”是洞库设计的关键参数及影响水封性的关键因素。
In order to study the determination methods of"three major elevations"in the design of underground water sealed caverns,including the elevation of the groundwater level,the elevation of the water curtain system,and the elevation of the oil storage caverns,a method for determining the"three major elevations"from the perspective of water sealing effect on the bases of a certain cavern project was proposed.The water sealing evaluation was also conducted.The analysis results indicated that the regional groundwater drainage datum plane can be taken as the design groundwater level.The design elevations of the water curtain system and the main caverns need to be determined based on a comprehensive consideration of the water sealing effect,the thickness of the"water cover layer"formed above the storage caverns,and the amount of inflow toward the caverns from the surrounding rocks.According to the calculation model established based on the cavern project,the elevation of the designed groundwater level was 25 meters above the water curtain system,and the water curtain system was 25 meters above the storage caverns.The numerical simulation results showed that it has a good water sealing effect,and small adjustments to these elevation parameters can also ensure water sealing.The"three major elevations"are both the key parameters in storage caverns design and the key factors affecting water sealing.
作者
荆少东
杜亦农
JING Shaodong;DU Yinong(Engineering Department,China Petrochemical Corporation,Beijing 100728,China)
出处
《隧道与地下工程灾害防治》
2024年第3期43-49,共7页
Hazard Control in Tunnelling and Underground Engineering
关键词
地下水封洞库
水封效果
三大高程
水幕系统高程
主洞室高程
underground water-sealed cavern
water sealed effect
three major elevations
groundwater curtaining system elevation
main cavern elevation
