某水封洞库工程防渗灌浆策略研究  

Seepage Prevention Grouting Strategy for an Underground Oil Storage in Rock Caverns

作　　者：李领 LI Ling(China Anneng Group First Engineering Bureau Co.,Ltd.,Nanning 530200,China)

机构地区：[1]中国安能集团第一工程局有限公司,广西南宁530200

出　　处：《红水河》2024年第4期138-144,共7页

摘　　要：通过实施地下水封洞库围岩灌浆,降低围岩渗透系数,是实现提高洞库水封性和控制洞库渗水量双重目标的重要手段。笔者依托国内某在建水封洞库工程,结合已实施的不同类型灌浆数据,对预灌浆和后灌浆的灌浆效果进行对比分析,总结出灌前透水率-单位耗灰量的变化规律。结果表明:预灌浆效果优于后灌浆;在现有灌浆压力条件下,灌浆部位围岩结构没有发生明显非线性变化,可以进一步提高灌浆压力;相当部分灌浆孔的灌前透水率接近于0 Lu,单位耗灰量也仅为封堵灌浆孔的耗灰量,灌浆判据有进一步调整优化的空间。研究成果对后续水封洞库灌浆具有很强的指导作用和参考价值。The implementation of underground oil storage in rock caverns surrounding rock grouting to reduce the permeability coefficient of surrounding rock is an important means to achieve the dual goals of improving the water seal of the cavern and controlling the seepage volume of the cavern.Based on an underground oil storage in rock caverns under construction in China,combined with different types of grouting data that have been implemented,the author compares and analyzes the grouting effects of pre-grouting and post-grouting,and summarizes the variation law of water permeability before grouting-unit ash consumption.The results show that the pre-grouting effect is better than that of the post-grouting;under the condition of existing grouting pressure,there is no obvious nonlinear change in the surrounding rock structure at the grouting site,which can further improve the grouting pressure;The permeability before grouting of a considerable number of grouting holes is close to 0 Lu,and the unit ash consumption is only the ash consumption of plugging grouting holes,and there is room for further adjustment and optimization of grouting criteria.The research results have a strong guiding role and reference value for the subsequent grouting of underground oil storage in rock caverns.

关 键 词：水封洞库 防渗 预灌浆 后灌浆 

分 类 号：TV223.4[水利工程—水工结构工程]