CAJ | 학술논문

研究单井点和单排井点真空降水条件下，地层中地下水水位和抽水流量，在重力场和真空压力场耦合作用下的变化过程，并进行比较分析。试验表明，对于单井点排水条件，随着真空负压力和抽水井深度的增大，水位的下降有一定增加，而离开抽水井点较远处的水位下降更为明显。单排井点布置条件下，随着抽水井深度和抽水井间距的增大，无论是抽水井点布置方向还是垂直于抽水井点布置方向的地下水位的下降深度将有明显增大，而沿抽水井布置方向的水位下降深度更为显著。此外，在多次反复降水条件下，后续降水过程中地下水位的下降速率将有增快的趋势。试验还表明，抽水井井口的负压力小于真空泵出水口处的负压力，损失量可达12.5%，因此，在进行真空降水设计时需要考虑出水管道的长度。
연구단정점화단배정점진공강수조건하，지층중지하수수위화추수류량，재중력장화진공압력장우합작용하적변화과정，병진행비교분석。시험표명，대우단정점배수조건，수착진공부압력화추수정심도적증대，수위적하강유일정증가，이리개추수정점교원처적수위하강경위명현。단배정점포치조건하，수착추수정심도화추수정간거적증대，무론시추수정점포치방향환시수직우추수정점포치방향적지하수위적하강심도장유명현증대，이연추수정포치방향적수위하강심도경위현저。차외，재다차반복강수조건하，후속강수과정중지하수위적하강속솔장유증쾌적추세。시험환표명，추수정정구적부압력소우진공빙출수구처적부압력，손실량가체12.5%，인차，재진행진공강수설계시수요고필출수관도적장도。
Based on the field tests of vacuum well-point dewatering, the evolutions of groundwater level and the variations of the water flow in silt ground layer are studied under combined gravitational and vacuum negative pressure, which include both the cases of a single well-point and a single row well-point. Test results show that, for the condition of a single well, the declining depths of groundwater level increase with the increase of vacuum negative pressure and the depth of drainage well, and the declines of groundwater level at the points away from the drainage well will be more obvious. For the condition of a single row well-point, with the increase of the depth and space of drainage wells, the declines of groundwater level are also very apparent whether along the direction of well-point arrange or in the perpendicular direction of well-point arrange;and the former is more obvious. On the other hand, the declining ratio of groundwater level has an increasing trend after several repeated dewatering processes. Besides, the vacuum pressure in the mouth of a well is lower than it in the water outlet of vacuum pump with a loss of approximately 12.5%, which indicates that the length of the pipeline of water outlet should be considered in the design of vacuum well-point dewatering in practice.