help me (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 thesettlement in the clay after primary consolidation.Estimate the settlement associated with the top 10' sublayer of clay due to the applied load Ap.Rotate counterclockwisepage 8 of 8 - The soils in the figure to the right have the following properties:Sand total unit weight y; above & below water table 110 lb/ft3Clay total unit weight y:Clay coefficient of consolidation c,Virgin index C.Др120 Ib/ft33 ft?/year.Recompression index C, 0.0045'0.0215'sandA surface loading Ap = 1200 Ib/ft? is applied to this site over a wide area.%3D5'(a) Assuming hydrostatic conditions, estimate the following at point A:A20'clay15'(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 Ovmtively. Initial void ratio e, is 0.90. We wish to use two sublayers of equal thickness to estimate thesettlement 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-

The ability of the soil to compress or settle with respect to the increase in effective stress by…

(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.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter2: Geotechnical Properties Of Soil

Section: Chapter Questions

Problem 2.16P

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The following data are given for normally consolidated clay: Thickness=2.6m Primary Cc=0.3 Secondary Cc=0.02 e=0.8 Average Pressure=127 kPa Change in pressure (vertical) =46 kPa Determine the following 1. Primary Consolidation Settlement (Ans. 58.17mm) 2. Secondary Settlement five years after the completion of the primary settlement. The time for completion of primary settlement is 1.5 years. (Ans. 15.4mm)
The soil profile at a site consists of 2 m of sand at the groundlevel, underlain by 6 m of clay, followed by a very stiff claystratum that can be assumed to be impervious and incompressible.The water table is at 1.5 m below the ground level. Themoist and saturated unit weights of the sand are 17.0 kN/m3and 18.5 kN/m3, respectively. The clay has an initial void ratioof 0.810, saturated unit weight of 19.0 kN/m3, and coefficientof consolidation of 0.0014 cm2/s.a. When the ground is surcharged with 3 m high compactedfill with moist unit weight of 19.0 kN/m3, the settlementwas 160 mm in the first year. What would be the consolidationsettlement in the first two years?b. If the clay is normally consolidated, what is the compressionindex of the clay?
‘mormally consolidated clay given: 1S kKN/m® ateo=122 = 430 KN/m? ate=098 * 10° m/sec, Find: long in days will it take for a 3 m thick lsyer of the same drained both sides in the field to reach 50% consolidation? is settlement at 50% consolidation?
A granular soil with Gs =2.65, emax = 0.870, and emin= 0.515 is compacted to a moist unit weight of 110.4 lb/ft3 at moisture content of 10.5%. What is the relative density of this compacted sand?
The relative compaction of a sand in the field is 94%. The maximum and minimum dry unit weights of the sand are 18.60 KN/m³and 15.10 KN/m³respectively. For the field condition determine 25) Dry Unit weight? a) 15.25 KN/m³ b) 20.50 KN/m³ c) 17.48 KN/m³ d) 18.90 KN/m³ Relative density of compaction? a) 69.80 % b) 99.20 % c) 72.40 % d) 73.05 % Moist unit weight at a moisture content of 8 % ? a) 19.77 KN/m³ b) 17.66 KN/m³ c) 18.88 KN/m³ d) 18.05 KN/m³
Figure below shows a soil profile. The uniformly distributed load on the ground surface is Δσ. 2Given Δσ = 150 kN/m , compression index (Cc) for clay layer is 0.30, and recompression index (Cs) for clay layer is 0.06. Estimate the primary consolidation settlement if the clay is normally consolidated (NC).Given:H1 =2.5m,H2 =2.5m,andH3 =3.5m.Sand: γdry(sand) = 15 kN/m3; γsat(sand) = 18 kN/m3 Clay: γsat(clay) = 19 kN/m3; Initial void ratio for clay, e0 = 0.65
9. The degree of compaction of a type of sand in the field is 93.5%. considering Yd max =16.98 kN/m3 and Yd min = 14.46 kN/m3, what is the field dry specific gravity and relative compaction compactness?
For a sandy soil, emax= 0.78, emin= 0.54 and Gs= 2.70 A. What is the void ratio of the soil at Dr= 68%? B. What is the dry unit weight of soil? C. What is the zero-air void unit weight?
14. Situation 14 - A 3-layer soil has the following properties from top to bottom: a. Obtain the equivalent horizontal coefficient of permeability, in cm/sec. Round off to five decimal places. b. Obtain the equivalent vertical coefficient of permeability, in cm/sec Round off to seven decimal places.
Question-3: A soil profile is shown in Figure 3.1. If a uniformly distributed load, ∆σ, is applied at the ground surface, calculate the settlement of the clay layer caused by primary consolidation, if Cc = 0.27 and Cr = 0.045 and a. The clay is normally consolidated b. The preconsolidation pressure, σ′c = 190 kN/m2 c. σ′c = 170 kN/m2
Classify this soil for sandy soil if the submerged unit weight equal to water unit weight emax = 0.85 and emin = 0.259 Assume ( Gs ) .
Given: rw = 0.25 m, rs = 0.35 m, de =4.5 m, cv 5 cvr = 0.3 m2/month, kh/ks 5 2, and Hc = 9 m. Determine: The degree of consolidation for the clay layer causedonly by the sand drains after six months of surchargeapplication