A soil strata can be described as 6 meters of sand underlain by 4 meters of clay with the water table located 7 meters from the bottom of said strata. The sand has a dry and saturated unit weight of 14 kN/m3and 18 kN/m3 resp. On the other hand, pertinent clay properties are saturated unit weight of 19 kN/m3 void ratio of 0.8 and liquid limit of 40. Compute the primary consolidation settlement considering the following conditions if a uniform load of 100 kPa is acting on the soil. If necessary, assume a logical value of Cs. A. The clay is normally consolidated. B. The pre-consolidation pressure is 190 kN/m2 C. The pre-consolidation pressure is 170 kN/m2.

A soil strata can be described as 6 meters of sand underlain by 4 meters of clay with the water table located 7 meters from the bottom of said strata. The sand has a dry and saturated unit weight of 14 kN/m3and 18 kN/m3 resp. On the other hand, pertinent clay properties are saturated unit weight of 19 kN/m3 void ratio of 0.8 and liquid limit of 40. Compute the primary consolidation settlement considering the following conditions if a uniform load of 100 kPa is acting on the soil. If necessary, assume a logical value of Cs. A. The clay is normally consolidated. B. The pre-consolidation pressure is 190 kN/m2 C. The pre-consolidation pressure is 170 kN/m2.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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In a reclamation project, the middle of a clay layer is under an initial effective vertical stress of 200 kPa and initial void The clay is ratio (eo) of 0.90. overconsolidated with OCR of 1.4, compression index of 0.34 and expansion index of 0.07. With an applied load of 299 kPa, what will be the final void ratio (e1) for the clay?
The soil profile shown below is subjected to a uniformly distributed load (UDL) on ground surface of 600 kN/m². The underground soil consist of two normally consolidated clay (N.C.C.) layers, and between them one sand layer with properties as shown on the figure. If the ground water table is at the ground surface, and the (AP) assumed to be the same at both clay layers, Calculate the total consolidation settlement Sc from the two clay layer? assume compression index, Cc=0.007(LL-10). 4.0 m 3.0 m 2.0 m Clay Sand Clay AP=600 kN/m² W, 35%. LL-40%. G.-2.65 Ys at = 18 kN/m³ W, 40, LL=45%, G,-2.78 ▼ G.W.T
A 3 m thick saturated soil stratum has a compression index of 0.25 and coefficient of permeability 3.2 x 10-3 mm/sec. If the voids ratio is 1.5 at vertical stress of 0.10 N/mm2, compute the voids ratio when the vertical stress is increased to 0.25 N/mm2. Also calculate settlement due to above stress increase and time required for 50% consolidation. Assume single drainage.
4. A soil strata can be described as 6 meters of sand underlain by 4 meters of clay with the water table located 7 meters from the bottom of said strata. The sand has a dry and saturated unit weight of 14 kN/m³ and 18 kN/m³ resp. On the other hand, pertinent clay properties are saturated unit weight of 19 kN/m³ , void ratio of 0.8 and liquid limit of 40. Compute the primary consolidation settlement considering the following conditions if a uniform load of 90 kPa is acting on the soil. If necessary, assume a logical value of Cs. A. The clay is normally consolidated. B. The pre-consolidation pressure is 190 kN/m? C. The pre-consolidation pressure is 170 kN/m².
13. Situation 13 - The soil is acted upon by a uniformly distributed load ΔP = 60 kPa at the ground surface. a. Compute the settlement of the clay layer, in mm, caused by primary consolidation if the preconsolidation pressure of clay is 230 kPa. Use Cs = Cc/5. Round off to the nearest whole number. b. Compute the settlement of the clay layer, in mm, caused by primary consolidation if the clay is normally consolidated. Round off to the nearest whole number. c. Compute the settlement of the clay layer, in mm, caused by primary consolidation if the preconsolidation pressure of clay is 200 kPa. Use Cs = Cc/5. Round off to the nearest whole number.
For a normally consolidated clay layer in the field, the following values are given: Thickness of clay layer = 8.5 ft ● Void ratio = 0.8 ● ● ● ● Compression index (CC) = 0.28 Average effective pressure on the clay layer is 2650 lb/ft² Additional Overburden Pressure is 970 lb/ft² Secondary compression index (Ca) is 0.02 Determine the total consolidation settlement considering primary and secondary settlement. Select the correct response: 2.6425" 2.5631" 2.8866" 2.3856"
The thickness of a saturated specimen of clay under a consolidation pressure of 100 kN/m2 of is 24 mm and its water content is 20%. On increase of the consolidation pressure to 200 kN/m2, the specimen thickness decreases by 3 mm. Determine the compression index for the soil if the specific gravity of the soil grains is 2.70. a.0.92 b.0.56 c.0.63 d.0.52