1. The water table in a certain deposit of soil is at a depth of 6.5 ft below the ground surface. The soil consists of clay up to a depth of 13 ft from the ground and below which lies sand. The clay stratum is saturated above the water table. Given: Clay stratum: w = 30 percent. Gs = 2.72; Sandy stratum: w = 26 percent, Gs = 2.64. Required: (i) The total pressure, pore pressure and effective pressure at a depth of 26 ft below the ground surface. (ii) The change in the effective pressure if the water table is brought down to a level of 13 ft below the ground surface by pumping. 3. (a) Mass of jar with cone and sand (before use) = 4950 g. (b) mass of jar with cone and sand (after use) = 2280 g. (c) mass of soil from the hole = 2925 g. (d) dry density of sand = 1.48 g/cm3, (e) water content of the wet soil = 12%. Determine the dry unit weight of compacted soil. 4. The following data were obtained from a field density test on a compacted fill of sandy clay. Laboratory moisture density tests on the fill material indicated a maximum dry density of 1.92 Mg/m3 at an optimum water content of 11%. What was the percent compaction of the fill? Was the fill water content above or below optimum? Mass of the moist soil removed from the test hole = 1038 g Mass of the soil after oven drying = 914 g Volume of the test hole = 478.55 cm³ 5. A soil mass in its natural state is partially saturated having a water content of 17.5% and a void ratio of 0.87. Determine the degree of saturation, total unit weight, and dry unit weight. What is the weight of water required to saturate a mass of 10 m³ volume? Assume Gs = 2.69. 6. DO DO Tools A sieve analysis of a given sample of sand was carried out by making use of US standard sieves. The total weight of sand used for the analysis was 522 g. The following data were Laminat Mobile View 13 Share W PDF to DOC Edit on P
1. The water table in a certain deposit of soil is at a depth of 6.5 ft below the ground surface. The soil consists of clay up to a depth of 13 ft from the ground and below which lies sand. The clay stratum is saturated above the water table. Given: Clay stratum: w = 30 percent. Gs = 2.72; Sandy stratum: w = 26 percent, Gs = 2.64. Required: (i) The total pressure, pore pressure and effective pressure at a depth of 26 ft below the ground surface. (ii) The change in the effective pressure if the water table is brought down to a level of 13 ft below the ground surface by pumping. 3. (a) Mass of jar with cone and sand (before use) = 4950 g. (b) mass of jar with cone and sand (after use) = 2280 g. (c) mass of soil from the hole = 2925 g. (d) dry density of sand = 1.48 g/cm3, (e) water content of the wet soil = 12%. Determine the dry unit weight of compacted soil. 4. The following data were obtained from a field density test on a compacted fill of sandy clay. Laboratory moisture density tests on the fill material indicated a maximum dry density of 1.92 Mg/m3 at an optimum water content of 11%. What was the percent compaction of the fill? Was the fill water content above or below optimum? Mass of the moist soil removed from the test hole = 1038 g Mass of the soil after oven drying = 914 g Volume of the test hole = 478.55 cm³ 5. A soil mass in its natural state is partially saturated having a water content of 17.5% and a void ratio of 0.87. Determine the degree of saturation, total unit weight, and dry unit weight. What is the weight of water required to saturate a mass of 10 m³ volume? Assume Gs = 2.69. 6. DO DO Tools A sieve analysis of a given sample of sand was carried out by making use of US standard sieves. The total weight of sand used for the analysis was 522 g. The following data were Laminat Mobile View 13 Share W PDF to DOC Edit on P
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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