Part of an on-site investigation for a geotechnical study where a reservoir will be built rectangular for storage yielded the following results: Depth (m) Soil Classification γt (kN/m3) 0-4 ML 18.6 4-5 SP-SC 19.6 5-9 CH 17.7 9-30 CH 18.2 +30 weathered rock - a) Calculate and plot the total stress, effective stress, and pore pressure. Assume that the level water table is 1.8 m from the surface. Consider the specific weights of the soil of 1.8 m down as saturated. From 0 – 1.8 m, there is a zone of capillarity. Draw the stratification to facilitate and appreciate the calculations. b) The 10 x 25 m warehouse will be built in the area. Note: The area is uniformly loaded. The design force includes the weight of the deposit + the weight of material stored which impose to the ground an overload of 120 kPa. Calculate and plot the vertical stress increase in function of the depth just in the center of the deposit. c) Compare the results with the calculated stress increment, using the 2:1 ratio method (V:H).
Part of an on-site investigation for a geotechnical study where a reservoir will be built
rectangular for storage yielded the following results:
Depth (m) Soil Classification γt (kN/m3)
0-4 ML 18.6
4-5 SP-SC 19.6
5-9 CH 17.7
9-30 CH 18.2
+30 weathered rock -
a) Calculate and plot the total stress, effective stress, and pore pressure. Assume that the level water table is 1.8 m from the surface. Consider the specific weights of the soil of 1.8 m down as saturated. From 0 – 1.8 m, there is a zone of capillarity. Draw the
stratification to facilitate and appreciate the calculations.
b) The 10 x 25 m warehouse will be built in the area. Note: The area is uniformly loaded. The design force includes the weight of the deposit + the weight of material stored which impose to the ground an overload of 120 kPa. Calculate and plot the vertical stress increase in function of the depth just in the center of the deposit.
c) Compare the results with the calculated stress increment, using the
2:1 ratio method (V:H).
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