Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN: 9781305970939
Author: Braja M. Das, Khaled Sobhan
Publisher: Cengage Learning
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Chapter 3, Problem 3.22P
To determine
Calculate the volume of borrow material needed to construct
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A large building is to be built on a thick layer of normally consolidated clay shown in the figure below. The building is to be placed at the bottom of a 4 m deep excavation, which will correspond to 1 level of parking garages. The water table remains 4 m below the ground surface during the entire process.
Find the OCR in the middle of the clay layer at Point A, a long time after excavation and before construction of the building. (Answer tolerance = 2%).
A 5.1 m thick clay soil with a current overburden pressure of 89 kPa is going to experience an additional stress of 89 kPa after a new structure is built. If it was determined that the clay is normally consolidated has an initial void ratio of 1.2, a recompression index of 0.07, and a compression index of 0.47. Determine the total amount of settlement that is expected to occur. Provide your answer in meters to 3 decimal places.
What is the active pressure coefficient for a soil with 28˚ angle of internal friction and cohesion of 20 kPa? What will be the effect if the cohesion is decreased to 5 kPa?
Chapter 3 Solutions
Principles of Geotechnical Engineering (MindTap Course List)
Ch. 3 - Prob. 3.1PCh. 3 - Prob. 3.2PCh. 3 - Prob. 3.3PCh. 3 - Prob. 3.4PCh. 3 - Prob. 3.5PCh. 3 - Prob. 3.6PCh. 3 - Prob. 3.7PCh. 3 - Prob. 3.8PCh. 3 - Prob. 3.9PCh. 3 - Prob. 3.10P
Ch. 3 - Prob. 3.11PCh. 3 - Prob. 3.12PCh. 3 - Prob. 3.13PCh. 3 - Prob. 3.14PCh. 3 - Prob. 3.15PCh. 3 - Prob. 3.16PCh. 3 - Prob. 3.17PCh. 3 - Prob. 3.18PCh. 3 - Prob. 3.19PCh. 3 - Prob. 3.20PCh. 3 - Prob. 3.21PCh. 3 - Prob. 3.22PCh. 3 - Prob. 3.23PCh. 3 - Prob. 3.24PCh. 3 - For a given sandy soil, emax = 0.75 and emin =...Ch. 3 - For a given sandy soil, the maximum and minimum...Ch. 3 - Prob. 3.27PCh. 3 - Prob. 3.28PCh. 3 - Prob. 3.29PCh. 3 - Prob. 3.1CTPCh. 3 - Prob. 3.2CTPCh. 3 - Prob. 3.3CTP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- Saturated silty clay encountered in a deep excavation is found to have a water content of 15%. Determine the unit weight of clay. G=2.7arrow_forwardA saturated clay encountered in a deep excavation is found to have a water content of 23.5%. Determine its porosity and (saturated) unit weight.arrow_forwardAnswer the following questions: a- What is pre-consolidation pressure? Plot the consolidation curve and show it. b- In which region of the optimum water content of a dam clay core is desired to be, explain why.arrow_forward
- PROBLEM 50: Compute the compression index of undisturbed clay having a plastic limit of 32% and a plasticity index of 8%arrow_forwardThe soil for backfilling comes from a borrow pit. The water content of the soil in the borrow pit is 15% and its void ratio is 0.69. The swell index index is 1.2. The specification requires the backfill material to be compacted to a dry unit weight of 16 kN/m^3 1. What is the dry unit weight of the borrow pit material? 2. What is the volume of the borrow pit soil required? 3. What is the volume of borrow pit material required considering swell? 4. What is the number of truckloads of soil required for the footing foundation? 5. What is the weight of dry soil in one truck load? 6. What is the weight of water per truck load? 7. What is the degree of saturation of the soil in situation Please answer. Thank you so mucharrow_forwardThe soil for backfilling comes from a borrow pit. The water content of the soil in the borrow pit is 15% and its void ratio is 0.69. The swell index index is 1.2. The specification requires the backfill material to be compacted to a dry unit weight of 16 kN/m^3 1. What is the dry unit weight of the borrow pit material? 2. What is the volume of the borrow pit soil required? 3. What is the volume of borrow pit material required considering swell? 4. What is the number of truckloads of soil required for the footing foundation? 5. What is the weight of dry soil in one truck load? 6. What is the weight of water per truck load? 7. What is the degree of saturation of the soil in situation Please answer. Thank you! Guide is in the picture. Thanksarrow_forward
- A square footing supporting a column applies a uniform pressure of 100 kPa on top of a deep clay deposit. Based on the bulbs of pressure developed below the footing shown in the following figure, which of the following statements are correct (select all that apply)? A.Immediately after construction, the excess pore water pressure (∆u) developed at Point A remains lower than ∆u developed at Point B B.Immediately after construction, the excess pore water pressures (∆u) developed at Points B and C are the same C.Since the clay layer is homogeneous, one-dimensional Terzaghi’s theory of consolidation can be applied to provide an accurate estimate of the rate of consolidation at Points A, B, and C. D.After construction, three-dimensional seepage occurs below the foundation as the excess pore water pressures dissipate.arrow_forwardIf a representative clay specimen 20 mm thick, under double drainage, took 121 minutes for 90% primary compression, estimate the time in days required for 50% primary compression of a field layer 2 m thick, bounded by impervious boundary at the bottom and sand at the top.arrow_forwardCan I get a step by step for this question? A 1.2 meter-thick strata of sand has a void ratio of 1.81. A contractor passes a vibratory roller over these strata, which densifies it and reduces its void ratio to 1.23. If the moisture content remains the same unchanged, compute the thickness of the sand after compactionarrow_forward
- A buried clay layer 10 ft thick is sandwiched between strata of free-draining granular soil so that double drainage during consolidation can occur. Calculations indicate that, because of a planned building loading, an ultimate settlement of 2 in. is expected as a result of primary compression in the clay layer. The coefficient of consolidation for the clay is 0.01 ft2/day. (a) How long will it take for 90 percent of the estimated settlement to take place?(b) How much settlement will occur in one year?(c) How long will it take for 1 in. of settlement to take place?arrow_forwardThe following figure show the relationship between the voids ratio and effective stress for a soil sample collected from the mid depth of a 6 m thick clay layer. The Cc and Cr values have been determined to be 0.3 and 0.04 respectively. For the given information: If the current effective stress at the mid depth is 70 kPa, calculate the ultimate consolidation settlement when the effective stress at mid depth increases by 10 kPa due to an applied load. If the coefficient of consolidation is 0.555 m2/s and the clay layer is single drained, calculate the time taken to reach 45% consolidation.arrow_forwardIn the soil profile shown below, the water table is currently located at the ground surface (WT.1) and the clay layer has an OCR equal to 2.0. If the water table changes from level WT.1 to level WT.2 as depicted in the figure below, what is the new OCR in the middle of the clay layer a long time after the drawdown?arrow_forward
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