超深管井现场原水真空缓堵回灌试验研究

Experimental Study on Vacuum Slow Blockage and Recharge of Raw Water in Ultra-deep Tube Well

地下水回灌具有控制水位下降、保护环境、节约水资源等功能,超深基坑开挖推进了回灌技术的研发,堵塞所导致的回灌水量的不断减少是地下水可持续回灌的瓶颈。结合上海张江硬X射线工程,采用气举反循环工艺成孔,采用真空缓堵技术,进行了第二、第三承压含水层的回灌试验,取得较好的回灌效果。讨论了提高回灌效果的一些技术问题,并提出了今后的发展方向。超深管井地下水回灌技术的讨论。

The groundwater recharge has the functions,such as controlling water level drop,protecting environment,saving water resources,etc.The excavation of ultra deep foundation pit promotes the research and development of groundwater recharge.The continuous reduction of recharge water volume caused by blockage is the bottleneck of continuous groundwater recharge.Combined with the Zhangjiang hard X-ray project in Shanghai,the groundwater recharge test of the second and third confined aquifers is done by using air-lift reverse circulation technology to form holes and vacuum slow blockage technology,and good recharge effect is achieved.Some technical problems to improve the effect of recharge are discussed,and the future development direction is put forward.