长江科学院院报2024，Vol.41Issue(4)：174-180,7.DOI:10.11988/ckyyb.20230883
土石坝灌浆设计与施工关键技术探讨
Discussion on Key Technologies for Grouting Design and Construction of Earth-Rock Dams
摘要
Abstract
The grouting process for the foundation of earth-rock dams,including core wall rockfill dams and panel rockfill dams,is influenced by various factors such as limited cover depth,blasting operations,unloading proces-ses,and the presence of weak rock formations.These factors often lead to challenges such as significant uplift,frac-turing,and seepage during grouting operations,posing difficulties in achieving effective injection and ensuring quality,consequently jeopardizing the reservoir's normal water storage.We analyzed the key design issues such as the selection of foundation rock mass,layout of grouting corridors,arrangement of grouting holes,determination of grouting and inspection pressures.Furthermore,on the basis of specifications and engineering practice,we dis-cussed the grouting methodologies,methods for managing external seepage,selection of blocking devices,control of uplift,and pressure augmentation strategies.Finally,we propose the method of determining curtain grouting pres-sure and inspection pressure,the systematic sealing and ramdom sealing for leakage,the criteria for selecting bloc-king devices,and the grouting control based on P-Q relation to offer reference for similar dam foundation grouting.关键词
土石坝/灌浆设计/施工关键技术/盖重/抬动控制/帷幕灌浆压力Key words
earth-rock dams/grouting design/construction key technology/cover weight/lifting control/curtain grouting pressure分类
建筑与水利引用本文复制引用
施华堂,计阳,肖碧,钟坤..土石坝灌浆设计与施工关键技术探讨[J].长江科学院院报,2024,41(4):174-180,7.基金项目
长江勘测规划设计研究有限责任公司科研项目(CX2020Z08) （CX2020Z08）
