Research Article
Optimization Analysis of Deformation of Underlying Tunnel in Dewatering and Excavation of Phreatic Aquifer
Table 3
Pumping rate, time, and depth in three steps.
| | Step | Pumping time (min) | Pumping rate (m3/d) | Drawdowns of pumping well sw (m) | Drawdowns of observation well 1 s1 (m) | Drawdowns of observation of well 2 s2 (m) |
| | 1 | 540 | 1192 | 12.5 | 1.06 | 0.80 | | 2 | 640 | 782 | 10.5 | 0.93 | 0.73 | | 3 | 360 | 509 | 5.5 | 0.78 | 0.61 |
|
|
