Figure 5.
The graph depicts tentative limits of application of various geotechnical processes, with the x-axis showing particle size from 0.002 millimetres to 200 millimetres across Clay, Silt, Sand, Gravel, and Cobbles, and the y-axis showing per cent finer by weight from 0 to 100. Curved boundary lines define ranges labelled Electro osmosis, Wells and or wellpoints with vacuum, Gravity drainage too slow, Theoretical limit of gravity drainage, and Gravity drainage. Additional notes indicate that subaqueous excavation or grout curtain may be required, and that the range may be extended by using large sumps with gravel filters, illustrating method suitability across soil conditions.Dewatering systems applicable to different soils (re-drawn from figure 3.11 of Mansur and Kaufman (1962), originally attributed to Moretrench Corporation)