土的性質(zhì)外文翻譯(已修改)
2025-06-01 13:40 本頁面
【正文】 Water in a Soil Mass As regards water in the soil,we differ among gravitational water or ground water,capillary water,bound water and interlayer water of a mineral. water The gravitational water is mainly concentrated at contact point between grains that is in steady motion under the influence of gravitational is a regular water table for the water. Below the water table there exists a watersaturated zone and hydrostatic water within it,The gravitational water has a negative influence on foundation form of water exists in both coarsegrained soils and finer soils,following Darcy39。s will be discussed in details in chapter 4. water The capillary water,above the gravitational water table,is held by capillary force (surface tension force) that is governed by the surface tension of grains and the diameter of height, Hc, to which water will rise in a capillary tube (void space) , is, theoretically,directly proportional to the surface tension force T, divided by the diameter of the tube d: So the height of the capillary zone (the occupied area of capillary water) will also be affected by the cleanness of the water。 it could be much less for pollutes water. According to Terzaghi and Pech (1967) ,the Hc can be giver as: 10edcHc? Where Hc —— maximum height of capillary size, in mm, relates to minimum pore size。 e —— void ratio。 d10 —— effective size, mm。 c —— constant,10~20 mm2 (for clean water) . Capillary rising depends on grain size distribution. As always, the smaller the grain is, the higher the capillary rises, except for some of clay particles that is filled with bound water surrounding the grains. As a geotechnique engineer, you should be aware of a big difference between the capillary water and the gravitational water: the watersaturated zone filled with the gravitational water has hydrostatic pressure, while pore water pressure produced by
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