Correct answer only A partially-saturated soil sample has natural moisture content of 25% and bulk unit weightof 18.5 kN/m³. The specific gravity of soil solids is 2.65 and unit weight of water is 9.81kN/m³. The unit weight of the soil sample on full saturation is(a) 21.12 kN/m³(b) 20.12 kN/m³(c) 18.50 kN/m³(d) 19.03 kN/m³

Given data, Partially saturated soil sample has natural moisture content of, w= 0.25Bulk unit…

Answered: The unit weight of the soil sample on…

Engineering

Civil Engineering

The unit weight of the soil sample on full saturation is

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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1. A soil profile consisting of three soil layers is shown. Characteristics of the layers are: Layer No. Thickness Soil Parameters 1 H1 = 5m e = 0.7; Gs = 2.69 2 H2= 8m e = 0.55; Gs = 2.7 3 Ha = 3m w = 38%; e = 1.2 TE H₂ NIVS B Layer 1 Groundwater table Layer 2 Layer 3 Dry sand Sand Clay Rock Determine: a The effective stress at Point C b. The maximum Neutral Stress at Point D c.) What is the change in the effective stress at C if the water level rises 3m above Point A due to flooding?
Situation 10: A soil sample has water content of 25%, degree of saturation of 80%, and specific gravity of 2.70. 38. Determine the moist unit weight in g/cc. c.1.897 d. 1.675 a. 1.765 b. 1.831 39. Determine the porosity. 0.458 b. 0548 c. 0.564 d.0.654 a.
Problem 2 For a given soil, the following are known, G = 2.70, moist unit weight is 20.3067kN/m³, and the moisture content of 15%. Determine the: 1. Dry unit weight (in kN/m³). 2. Saturated unit weight unit weight (in kN/m³). 3. Effective unit weight (y') of the soil sample (in kN/m³). 4. Void Ratio 5. Porosity (in %). 6. Degree of saturation (in %). 7. Determine the volume of water in liters to be added per cubic meter of soil for a 100% degree of saturation. If the sample has weight of 50g, determine the: 8. Weight of the solid 9. Weight of the water 10. Weight of the air 11. Volume of solid 12. Volume of water 13. Volume of air
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1. A soil deposit consists of three horizontal layers of soil: an upper stratum A (1m thick), a middle stratum B (2m thick) and a lower stratum C (3 m thick). Permeability tests gave the following values: Soil A, k = 0.3 mm/sec; Soil B, k = 0.2 mm/sec; Soil C: k =0.1 mm/sec. a) Determine the ratio of the average coefficients of permeability of the soil deposit (all three layers) in the horizontal and vertical direction. b) Beneath the deposit there is a gravel layer subjected to artesian pressure, the surface of the deposit coinciding with the ground water level. Standpipes show that the fall in head across soil A is 150 mm. Determine the value of the water pressure at the top of the gravel. 150 mm Soil A, Im Soil B, 2m Soil C, 3m Gravel Figure 1
A stratified soil has the following properties: h1 = 1.75m h2 = 2.5m h3 = 4.35m k1 = 2.25E-03 cm/sec k2 = 3.15E-04 cm/sec k3 = 4.75E-05 cm/sec What is the equivalent coefficient of permeability if the water flows perpendicular to the layer of soil (KeqV) in cm/sec?
6. The dry unit weight of a soil sample is 14.8 kN/m. Given that G, = 2.72 and w = 17%, determine: a. Void ratio b. Moist unit weight c. Degree of saturation d. Unit weight when the sample is fully saturated Determine the mass of water (in kg) to be added per cubic meter (m') of soil for 90% degree of saturation 100% degree of saturation
II. A sample of dry sand having a unit weight of 16.00 kN/m³ and a specific gravity of 2.65 is placed in the rain. During the rain the volume of the sample remains constant but the degree of saturation increases to 45%. What is the water content after being in the rain, in percentage? What would be the mass of water. in kg, added to the soil due to exposure to rain (assume unit volume)?
Problem 1. A proctor test is performed on a sandy soil. The unit weights and water contents correspond to the maximum and minimum dry unit weights are 19.8 kN/m³ - 9.5% and 16.27 kN/m³ - 12.5%, respectively. A dry unit weight of compaction in the field of 16.35 kN/m³ is measured. Estimate the following: a. The relative compaction in the field b. The relative density in the field
Homework 1- For a given soil, show that (1+wsat (Gs+es)Yw a- Ysat b- y = = n 1+e Wsat 2- The moist unit weight of a soil is 19.2 kN/m³. Given that G. = 2.69 and w=9.8%, determine: a. Void ratio b. Dry unit weight c. Degree of saturation Ans: e=0.51 , Ya=17.48KN/m³ , s=51.7% 3- Refer to Problem 2. Determine the weight of water, in kN. to be added per cubic meter (m°) of soil for a. 90% degree of saturation b. 100% degree of saturation Ans: Water add= 1.25 kN/m³ , 1.58 kN/m³ 4- For a given soil, the following are known: G, = 2.74, moist unit weight, y = 20.6kN/m², and moisture content, w = 16.6%. Determine: a. Dry unit weight b. Void ratio c. Porosity d. Degree of saturation Ans: Ya = 17.67 kN/m³ e=0.51 5- It is known that the natural soil at a construction site has a void ratio of 0.92. At the end of compaction, the in-place void ratio was found to be 0.65. If the moisture content remains unchanged, then determine: a. Percent decrease in the total volume of the soil due to compaction b.…
3 The moist unit weight of a soil is 19.2 KN/m^3. Given that Gs = 2.69 and w = 9.8%. Determine: Void Ratio, Dry Unit Weight, and the Degree of Saturation 4. A soil sample has a unit weight of 105.7 pcf (Pounds per Cubic Foot) and a saturation of 50%. When the saturation is increased to 75%, its unit weight raises to 112.7 pcf. Determine the void ratio and the specific gravity of the soil
Problem III. A sample of wet soil has water content of 15% and a porosity of 45%. The unit weight of soil solid is 26.487 (kN/m³). a. Find the dry density and saturated density (kN/m³). b. If the degree of saturation increases by 25%, determine the mass density (kN/m³)