Introduces the character, fundamental, technological process and system layout of jet well groundwaterlowering device.
简要介绍了射流井点降水装置的特点、基本原理以及装置的工艺流程及系统布置。
2
According to the general pattern of groundwaterlowering, this paper suggested a volume calculation method in the natural river courses in the freezing period.
根据地下水退水的一般规律，提出了针对天然河道封冻期流量推求方法的建议。
3
Marble karst development in Da-hong-shan mine caused a great deal of water bursting in mine shaft, sharply loweringgroundwater and large scale of surface subsidence.