(c) The maximum past pressure oym' at depths 25 ft and 35 ft are 3000 lb/ft? and 2500 lb/ft?, respec- tively. Initial void ratio e, is 0.90. We wish to use two sublayers of equal thickness to estimate the settlement in the clay after primary consolidation. Estimate the settlement associated with the top 10' sublayer of clay due to the applied load Ap.
(c) The maximum past pressure oym' at depths 25 ft and 35 ft are 3000 lb/ft? and 2500 lb/ft?, respec- tively. Initial void ratio e, is 0.90. We wish to use two sublayers of equal thickness to estimate the settlement in the clay after primary consolidation. Estimate the settlement associated with the top 10' sublayer of clay due to the applied load Ap.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:(c) The maximum past pressure oym' at depths 25 ft and 35 ft are 3000 lb/ft? and 2500 Ib/ft?, respec-
tively. Initial void ratio e, is 0.90. We wish to use two sublayers of equal thickness to estimate the
settlement in the clay after primary consolidation.
Estimate the settlement associated with the top 10' sublayer of clay due to the applied load Ap.
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page 8 of 8
Transcribed Image Text:- The soils in the figure to the right have the following properties:
Sand total unit weight y; above & below water table 110 lb/ft3
Clay total unit weight y:
Clay coefficient of consolidation c,
Virgin index C.
Др
120 Ib/ft3
3 ft?/year.
Recompression index C, 0.004
5'
0.02
15'
sand
A surface loading Ap = 1200 Ib/ft? is applied to this site over a wide area.
%3D
5'
(a) Assuming hydrostatic conditions, estimate the following at point A:
A
20'
clay
15'
(i) initial pore pressure u, prior to loading,
(ii) initial effective vertical stress ovo' prior to loading,
(iii) pore pressure u immediately after loading,
(iv) final effective vertical stress opf' at the end of primary consolidation.
B'
sand
(b) How long will it take to achieve an average degree of consolidation of 90% in the clay deposit?
(c) The maximum past pressure Ovm
tively. Initial void ratio e, is 0.90. We wish to use two sublayers of equal thickness to estimate the
settlement in the clay after primary consolidation.
Estimate the settlement associated with the top 10' sublayer of clay due to the applied load Ap.
at depths 25 ft and 35 ft are 3000 lb/ft? and 2500 lb/ft?, respec-
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