Following table presents information for a fine-g Current effective stress (kPa) Current void ratio of the soil Overconsolidation Ratio (OCR) Compression index (Cc) Re-compression index (Cr) 30 0.9 7.C 0.1 0.C Determine the void ratio of the soil at the precor

Following table presents information for a fine-g Current effective stress (kPa) Current void ratio of the soil Overconsolidation Ratio (OCR) Compression index (Cc) Re-compression index (Cr) 30 0.9 7.C 0.1 0.C Determine the void ratio of the soil at the precor

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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A proposed fill is to be placed on the soil profile shown in Figure 3.9. A consolidation test has been performed on a sample obtained from Point A, and this test indicates the preconsoli- dation pressure at that point is 200 kPa. Determine whether the silty clay stratum is normally consolidated or overconsolidated, and compute the o solidation ratio. The proposed fill has not yet been placed. overcon- Hint: Determine EFFECTIE STRRESS ATA water > leval 1.2m Silty Y = 19.1 kN/m 1.0m. Sand (SM): Y = 20.2 kN/m? 20 M Silty Clay (CL) Y=17.8 kN/m Figure 3.9 Soil profile for Example 3.3.
A particular soil failed under a major principal stress of 425 kPa with a corresponding minor principal stress of 215 kPa. If for the same soil, the minor principal stress is changed to 351 kPa, determine the new normal stress on the failure plane of the soil.
A soil sample has a compression index of 0.3. If the void ratio e at a stress of 2940 Ib/ft2 is 0.5, compute the settlement of soil stratum 13 ft thick in inches if the stress is increased to 4200 lb/ft2. include fbd
The layer is subjected to a uniform vertical stress increase of 100 kPa. The singly-drained clay layer has a coefficient of consolidation of 20 ft2 /yr. Determine the value of the excess pore pressure at point A 2 years after the application of the load. Also given is the chart giving the local degree of consolidation. a)4.4 kPa b)44 kPa c)88 kPa d)96 kPa
A dry sand sample of (1350 gm) was subjected to compression stress (198.6 kPa) of (0.9 kN) force. If the sample length was equal to twice of its diameter and the ratio of its diameter to volume of voids equal to (400 m?). Find: A) Specific gravity. B) Porosity. C). Void ratio
A certain saturated sand (S = 100%) has a moisture content of 27.9% and a specific gravity of solids of 2.61. It also has a maximum index void ratio of 0.90 and a minimum index void ratio of 0.33. Compute its relative density and classify its consistency. (Table on the right) Solution: Given the values of mmoisture content, specific gravity and degree of saturation, the void ratio can be estiamted as: e = Thus the relative density is found to be Dr = • According to the table, the soil is classified as %; soil. TABLE 3.3 CONSISTENCY OF COARSE-GRAINED SOILS AT VARIOUS RELATIVE DENSITIES (data from Lambe and Whitman, 1969) Relative Density, D,(%) 0-15 15-35 35-65 65-85 85-100 Classification Very loose Loose Medium denseª Dense Very dense "Lambe and Whitman used the term "medium," but "medium dense" is better because "medium" usually refers to the particle size distribution.
A cohesive soil sample is subjected to an unconfined compression test. The sample fails at a pressure of 3850 lb/ft2 [i.e., unconfined compressive strength lb/ft2]. Determine the soil’s cohesion. If an unconfined compression test is performed on the same clayey soil, what axial load can be expected at failure?
The normal stress of a soil sample is165 kPa at void ratio of 0.66. If the compression index of the soil is 0.25, determine the normal stress on the soil at void ratio of 0.56
An undisturbed sample of fine sand is tested in the laboratory and found to have a dry mass of 4.63 kg, a total volume of 0.00198 m³ and a specific gravity of 2.70. Other laboratory tests are performed to determine the maximum and minimum density of the sand. At the maximum density, it is determined that the void ratio is 0.35 at the minimum density, the void ratio is 0.95. A. Compute the void ratio of the sand. B. Compute the relative density of the undisturbed sample. C. Compute the dry density in Mg/m³.
The following results were obtained by testing a sample of clay: water content 25.6%, liquid limit 43.5%, plastic limit 19.1%. From this compute the following: (a) Liquidity Index (b) Plasticity Index (c) Shrinkage Limit
Note) For soil sample in Table 2, initial thickness of sample = 14.31 mm, sample area = 2827.433 mm^2, dry weight measured at the end of test = 52.53 g, specific gravity = 2.7 Also, Determine the compression index and expansion index Please show graph