By D. W. Quinion, G. R. Quinion
This consultant offers information regarding the overview of pumping and walling structures for extracting groundwater. Contents contain research of soil and groundwater, dewatering, defense, trench and underground excavations
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Additional info for Control of Groundwater
It is essential to keep water flows to a minimum in the base of the trench and to surround the suction hose inlet with a graded filter. The delivery side of the p u m p should be monitored by taking samples of water and checking the proportion of fines being removed. Continuous sheeting is installed at the trench sides when the soils are very permeable to provide continuous support to the excavated faces and to control the rate of water entering the trench. Sump pumping is used to remove that water (Fig.
Relief of artesian pressure by boreholes in a coffer-dam contact over their full length. Alternate piles may be con structed ahead of infill piles which overlap them, or piles are cast sequentially so that each pile cuts slightly into the previous one. The result will be impermeable if the joints are all effective. Such walls using continuously reinforced piles are often incorporated into the design of the perma nent works as retaining walls to underpasses and similar structures. Any leaks may be sealed by grouting behind them.
Troy Concrete site work, Graham series D. A. Greenwood Bateman Basic materials and workmanship, / . R. in the Ground stabilisation: deep compaction and grouting, Wilshire Basic draughtsmanship, R. /. J. G. Glanville, guide The Resident Engineer, second edition, Taylor /. K. Homer Ballantyne Tunnelling, T. M.