Tiêu đề 111. RefM 32 - Geotechnical Engineering and Hydraulics.pdf ✅

MANILA: Room 206, JPD Building, CM Recto Avenue, Manila CEBU: 4/F J. Martinez Bldg., Osmeña Blvd., Cebu City Telephone Number: (02) 516 7559 (Manila) E-Mail: buksmarquez1 @yahoo.com (032) 254-9967 (Cebu) Refresher Module – Geotechnical Engineering & Hydraulics 1. A layer of soft clay having an initial void ratio of 2 is 10m thick. Under a compressive load applied above it, the void ratio decreased by one-half. Evaluate the reduction in the thickness of the clay layer, in meters. A. 3.33 B. 5.0 C. 0.67 D. 6.67 2. A 450 kN is transmitted by a column footing onto the surface through a square footing 1.50 m on each side. Assuming that the force exerted on the underlying soil formation spreads on 2 vertical to 1 horizontal, evaluate the pressure in kPa exerted by the footing on a soil 2.7 m below it. A. 61.73 B. 55.40 C. 25.51 D. 22.22 SITUATION. A group of friction piles in deep clay is shown on the figure. The total load on the piles reduced by the weight of soil displayed by the foundation is 1800kN. Thickness of silt is 2.0 m and that of the clay is 16m. Unit weight of silt layer is 16kN/m3 3. Compute the effective overburden pressure in kPa (effective weight of soil above mid height of the consolidating layer) A. 142.59 B. 150.57 C. 149.25 D. 129.42 4. Compute the compression index of the clay layer. A. 0.288 B. 0.425 C. 0.564 D. 0.224 5. Compute the approximate total settlement of the pile foundation. A. 145mm B. 154mm C. 163mm D. 138mm SITUATION. A square footing 0.90m on a side is embedded 1.00m into a cohesionless soil deposit. The unit weight of soil is 18kN/m3 and the angle of internal friction is 30. Using Terzhaghi’s formula for general shear failure. Refer to TABLE HG-001. 6. Evaluate the contribution of the depth of embedment to the ultimate bearing capacity of the soil, in kPa. A. 310 B. 405 C. 162 D. 344 7. Evaluate the contribution of the footing dimension to the ultimate bearing capacity of the soil in kPa A. 310 B. 162 C. 124 D. 138 8. Evaluate the concentric load, in kN, that the footing can safely support, using a factor of safety of 3.0 against bearing capacity failure. A. 147 B. 217 C. 176 D. 143 SITUATION. The column of a certain building is supported by a circular footing having a diameter of 10 m. The depth of founding of the footings has to be at 2 m into a soil deposit of cohesionless soil for which the angle of internal friction of 20 degrees and the unit weight of which is 16 kN/m3 . Using Terzhaghi’s formula for general shear failure, Bearing capacity constant: Nc = 17.69 Nq = 7.44 Ny = 3.64 9. Evaluate the contribution of the depth of embedment to the ultimate bearing capacity of the soil, in kPa A. 145 B. 238 C. 263 D. 136 10. Evaluate the contribution of the footing dimension to the ultimate bearing capacity of the soil, in kPa. A. 175 B. 154 C. 291 D. 233 11. Evaluate the concentric downward load, in MN, that the footing can safely support, using a factor of safety of 3.0 against bearing capacity failure. A. 1.75 B. 15.4 C. 13.76 D. 10.8 12. A rectangular footing 3mx2m carries an eccentric load P=700kN acting at d1=1.5m, d2=1.0. Determine the maximum soil pressure. Neglect the weight of the footing. A. 116.67 B. 167.16 C. 161.17 D. 171.16