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Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
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sand to a height
capillary water: above this height the sand may be assumed to be dry.
The saturated and dry unit weights, respectively, are 20 kN/m³ and
16 kN/m³. Calculate the effective vertical stress in the sand 8 m below
the surface.
4 A layer of sand extends from ground level to a depth of 9 m and
overlies a layer of clay, of very low permeability, 6 m thick. The water
table is 6 m below the surface of the sand. The saturated unit weight of
the sand is 19 kN/m³ and that of the clay 20 kN/m³: the unit weight of
the sand above the water table is 16 kN/m³. Over a short period of
time the water table rises by 3 m and is expected to remain
permanently at this new level. Determine the effective vertical stress at
depths of 8 m and 12 m below ground level (a) immediately after the
rise of the water table, (b) several years after the rise of the water table.
Soil:
Soil
X-
X--
2 m
(1)
(2)
Fig. 3.9
Transcribed Image Text:sand to a height capillary water: above this height the sand may be assumed to be dry. The saturated and dry unit weights, respectively, are 20 kN/m³ and 16 kN/m³. Calculate the effective vertical stress in the sand 8 m below the surface. 4 A layer of sand extends from ground level to a depth of 9 m and overlies a layer of clay, of very low permeability, 6 m thick. The water table is 6 m below the surface of the sand. The saturated unit weight of the sand is 19 kN/m³ and that of the clay 20 kN/m³: the unit weight of the sand above the water table is 16 kN/m³. Over a short period of time the water table rises by 3 m and is expected to remain permanently at this new level. Determine the effective vertical stress at depths of 8 m and 12 m below ground level (a) immediately after the rise of the water table, (b) several years after the rise of the water table. Soil: Soil X- X-- 2 m (1) (2) Fig. 3.9
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