三峡水库港口岸坡排水方案优化研究

分析了三峡库区库岸的渗流自由面随库水位升降的变化规律,根据库区岸坡不同地层构造,提出了以网络盲沟、虹吸排水技术为代表的排水技术措施,明确了虹吸排水最大吸水高度8.0m的工程应用界限,创建的多级串联虹吸排水技术首次应用于库区港口岸坡稳定性方案设计,解决了库水位陡降条件下的岸坡同步排水降压和稳定安全的难题,对三峡库区岸坡失稳破坏等地质灾害防治和港口同步排水降压具有指导性意义。

Optimization of Port Bank Slope Drainage Technique in Three Gorges Area

This paper analyzes how the free seepage surface of the bank slope in the Three Gorges area changes with the reservoir level.According to different stratum characters,it puts forward underground slot-net and siphon drainage technique,and points out that the utility limit of siphon technique is 8.0 m.The invented multi-level series-wound siphon drainage technique is applied for the first time for bank slope stability design,which solves the problem of bank slope stability when the reservoir level descends sharply.The technique may serve as a reference for prevention and control of geologic disasters and draining relief of port.