MEC 316: Bài tập chương 1
1.1
The moist weight of 2,83.103 m3 of soil is 55,5.103 kN/m3. If the moisture content is 14% and the specific gravity of soil solids is 2.71, determine the following:
- Moist unit weight
- Dry unit weight
- Void ratio
- Porosity
- Degree of saturation
- Volume occupied by water
1.2
The moist unit weight of a soil is 19,2 kN/m3. Given that G = 2,69 and w = 9.8%, determine:
- Void ratio
- Dry unit weight
- Degree of saturation
1.3
Refer to Problem 1.2. Determine the weight of water, in kN, to be added per cubic meter (m3) of soil for
- 90% degree of saturation
- 100% degree of saturation
1.4
Undisturbed soil sample was collected from the field in steel Shelby tubes for laboratory evaluation. The tube sample has a diameter of 71 mm, length of 558 mm, and a moist weight of 42,5.10-3kN. If the oven-dried weight was 37,85.10-3kN, and Gs= 2.69, calculate the following:
- Moist unit weight
- Field moisture content
- Dry unit weight
- Void ratio
- Degree of saturation
1.5
When the moisture content of a soil is 26%, the degree of saturation is 72%, andthe moist unit weight is 16.98 kN/m3. Determine:
- Specific gravity of soil solids
- Void ratio
- Saturated unit weight
1.6
For a given soil, the following are known: G=2,74, moist unit weight, g = 20.6 kN/m3, and moisture content, w=16.6%. Determine:
- Dry unit weight
- Void ratio
- Porosity
- Degree of saturation
1.7
Refer to Problem 1.6. Determine the weight of water, in kN, to be added per cubic meter (m3) of soil for
- 90% degree of saturation
- 100% degree of saturation
1.8
The moist density of a soil is 1750 kg/m3. Given w=23% and Gs=2,73, determine:
- Dry density
- Porosity
- Degree of saturation
- Mass of water, in kg/m3, to be added to reach full saturation.
1.9
For a moist soil, given the following: V= 7,08.10-3m; ; W=136,8. 10kN;w=9.8%; Gs=2,66. Determine:
- Dry unit weight
- Void ratio
- Volume occupied by water
1.10
For a given soil, rd=2180 kg/m3 and n = 0.3. Determine:
- Void ratio
- Specific gravity of soil solids