A preliminary design of a reservoir is shown in Figure (5). The flownet is given below. It is required to: a) Calculate the flow rate. b) Calculate the porewater pressure at A & B. c) Calculate the factor of safety against downstream heave, given that the saturated unit weight of the silty sand layer is 17 kN/m³. Retaining wall Water 10 m 2 m Water 5 m 4 m. В 26 m. Silty sand keg =1 x 106 cm/s. Homogeneous, impervious clay Figure (5) Datum a d 6. 26 m 3 4 h 5 m scale Flownet Sketch

Structural Analysis
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Chapter2: Loads On Structures
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CEN-333 Geotechnical

A preliminary design of a reservoir is shown in Figure (5). The flownet is given below. It is required
to:
a) Calculate the flow rate.
b) Calculate the porewater pressure at A & B.
c) Calculate the factor of safety against downstream heave, given that the saturated unit weight
of the silty sand layer is 17 kN/m³.
Retaining wall
Water
10 m
12 m
Water
m
4 m
26 m.
Silty' sand
keg =1 x 10-6 cm/s.
Homogeneous, impervious clay
Figure (5)
Datum
d.
1
26 m
h
5 m
scale
Flownet Sketch
Transcribed Image Text:A preliminary design of a reservoir is shown in Figure (5). The flownet is given below. It is required to: a) Calculate the flow rate. b) Calculate the porewater pressure at A & B. c) Calculate the factor of safety against downstream heave, given that the saturated unit weight of the silty sand layer is 17 kN/m³. Retaining wall Water 10 m 12 m Water m 4 m 26 m. Silty' sand keg =1 x 10-6 cm/s. Homogeneous, impervious clay Figure (5) Datum d. 1 26 m h 5 m scale Flownet Sketch
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