摘要
大清沟水库薄墙工程采用了气举清淤工艺,即由专门管道将压缩空气输送至孔底,混搅孔底的沉积物,并在回浆管形成压力差,携带较粗颗粒的劣质泥浆顺势排出管外,经过往槽段内补充优质泥浆,达到置换槽内泥浆,清除孔底沉渣的作用。实践证明,采用气举清淤法清除在孔深25 m槽段内的沉渣,一般每孔耗时1.0~2.5 h。实践证明,气举清淤工艺具有灵活、操作简便、节约泥浆、减少污染、清淤彻底、效率高、成本低等特点。
In the project of the construction of thin-cutoff wall for Daqinggou Reservoir,the technology of air-lift dredging technology is applied;i.e.delivering compressed air to the hole bottom through the special pipeline and disturb sediment on the hole bottom,and then the pressure difference is formed in the return pipe;sequentially,the low-quality slurry with coarser grain is discharged out of the pipe.Furthermore,high quality slurry is supplemented through the groove segment of the cutoff wall,therefore,the ro...
出处
《水利水电技术》
CSCD
北大核心
2009年第4期44-45,50,共3页
Water Resources and Hydropower Engineering
基金
江西省科技计划项目(20041C030500)
关键词
气举清淤
墙体材料
混凝土防渗墙
膨润土泥浆液
大清沟水库
air-lift dredging
material for cutoff wall
concrete cut-off wall
bentonite slurry
Daqinggou Reservoir
