Part 1: True or False. Indicate whether the following statements are True (T) or False (F) by encircling the letter that corresponds to your answer. 1. (T/F) Residual soils are formed by the weathering of rocks in place. 2. (T/F) The Standard Penetration Test (SPT) provides a disturbed soil sample. 3. (T/F) The groundwater table has no effect on the interpretation of soil exploration data. 4. (T/F) Geophysical methods are always more accurate than direct soil sampling methods. 5. (T/F) The N-value in the SPT is the number of blows required to drive the sampler the first 150 mm. Part 2: Multiple choice. Choose the best answer for each question. 1. Which of the following is NOT a transported soil deposit? a) Alluvial b) Glacial c) Residual d) Aeolian 2. What is the primary purpose of subsurface exploration? a) To determine the depth of bedrock b) To identify soil types and their properties 3. Which test provides a continuous profile of soil a) Standard Penetration Test (SPT) b) Cone Penetration Test (CPT) c) To measure the groundwater table d) All of the choices resistance with depth? c) Vane Shear Test d) Pressuremeter Test 4. What is the most common method for obtaining undisturbed soil samples? a) Split-spoon sampler b) Shelby tube 5. What is the primary limitation of the Standard a) It cannot be used in cohesive soils b) It provides disturbed soil samples c) Auger boring d) Cone penetrometer Penetration Test (SPT)? c) It is not suitable for deep explorations d) It is expensive and time-consuming Part 3: Concept check. Answer the following questions briefly. 1. What is the difference between residual and transported soils? Provide an example of each. 2. Why is it important to consider the groundwater table during subsurface exploration? 3. What are the key differences between the Standard Penetration Test (SPT) and the Cone Penetration Test (CPT)? Part 4: Problem-Solving. Solve the following problems. Show all calculations. 1. A Standard Penetration Test (SPT) was conducted at a site, and the following blow counts were recorded: D Depth: 2 m, Blow count (N): 10 D Depth: 4 m, Blow count (N): 15 Depth: 6 m, Blow count (N): 20 0 The energy ratio is 60%, and the overburden correction factor CN is 1.1. Calculate the corrected N-values for each depth. 2. A soil sample was collected from a depth of 3 m using a Shelby tube. The sample had a volume of 0.01 m³ and a mass of 18 kg. If the water content is 12%, calculate the (a) bulk density, (b) dry density, and (c) void ratio of the soil. Assume the specific gravity of soil solids (Gs) is 2.65. 3. A Cone Penetration Test (CPT) was conducted at a site, and the following data was obtained: D Depth: 2 m, Cone resistance (qc): 5 MPa D Depth: 4 m, Cone resistance (qc): 8 MPa D Depth: 6 m, Cone resistance (qc): 12 MPa Estimate the soil type at each depth using typical qc correlations.

Part 1: True or False. Indicate whether the following statements are True (T) or False (F) by encircling the letter that corresponds to your answer. 1. (T/F) Residual soils are formed by the weathering of rocks in place. 2. (T/F) The Standard Penetration Test (SPT) provides a disturbed soil sample. 3. (T/F) The groundwater table has no effect on the interpretation of soil exploration data. 4. (T/F) Geophysical methods are always more accurate than direct soil sampling methods. 5. (T/F) The N-value in the SPT is the number of blows required to drive the sampler the first 150 mm. Part 2: Multiple choice. Choose the best answer for each question. 1. Which of the following is NOT a transported soil deposit? a) Alluvial b) Glacial c) Residual d) Aeolian 2. What is the primary purpose of subsurface exploration? a) To determine the depth of bedrock b) To identify soil types and their properties 3. Which test provides a continuous profile of soil a) Standard Penetration Test (SPT) b) Cone Penetration Test (CPT) c) To measure the groundwater table d) All of the choices resistance with depth? c) Vane Shear Test d) Pressuremeter Test 4. What is the most common method for obtaining undisturbed soil samples? a) Split-spoon sampler b) Shelby tube 5. What is the primary limitation of the Standard a) It cannot be used in cohesive soils b) It provides disturbed soil samples c) Auger boring d) Cone penetrometer Penetration Test (SPT)? c) It is not suitable for deep explorations d) It is expensive and time-consuming Part 3: Concept check. Answer the following questions briefly. 1. What is the difference between residual and transported soils? Provide an example of each. 2. Why is it important to consider the groundwater table during subsurface exploration? 3. What are the key differences between the Standard Penetration Test (SPT) and the Cone Penetration Test (CPT)? Part 4: Problem-Solving. Solve the following problems. Show all calculations. 1. A Standard Penetration Test (SPT) was conducted at a site, and the following blow counts were recorded: D Depth: 2 m, Blow count (N): 10 D Depth: 4 m, Blow count (N): 15 Depth: 6 m, Blow count (N): 20 0 The energy ratio is 60%, and the overburden correction factor CN is 1.1. Calculate the corrected N-values for each depth. 2. A soil sample was collected from a depth of 3 m using a Shelby tube. The sample had a volume of 0.01 m³ and a mass of 18 kg. If the water content is 12%, calculate the (a) bulk density, (b) dry density, and (c) void ratio of the soil. Assume the specific gravity of soil solids (Gs) is 2.65. 3. A Cone Penetration Test (CPT) was conducted at a site, and the following data was obtained: D Depth: 2 m, Cone resistance (qc): 5 MPa D Depth: 4 m, Cone resistance (qc): 8 MPa D Depth: 6 m, Cone resistance (qc): 12 MPa Estimate the soil type at each depth using typical qc correlations.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter6: Soil Compaction

Section: Chapter Questions

Problem 6.1CTP: Since laboratory or field experiments are generally expensive and time consuming, geotechnical...

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Transcribed Image Text:Part 1: True or False. Indicate whether the following statements are True (T) or False (F) by encircling the letter that corresponds to your answer. 1. (T/F) Residual soils are formed by the weathering of rocks in place. 2. (T/F) The Standard Penetration Test (SPT) provides a disturbed soil sample. 3. (T/F) The groundwater table has no effect on the interpretation of soil exploration data. 4. (T/F) Geophysical methods are always more accurate than direct soil sampling methods. 5. (T/F) The N-value in the SPT is the number of blows required to drive the sampler the first 150 mm. Part 2: Multiple choice. Choose the best answer for each question. 1. Which of the following is NOT a transported soil deposit? a) Alluvial b) Glacial c) Residual d) Aeolian 2. What is the primary purpose of subsurface exploration? a) To determine the depth of bedrock b) To identify soil types and their properties 3. Which test provides a continuous profile of soil a) Standard Penetration Test (SPT) b) Cone Penetration Test (CPT) c) To measure the groundwater table d) All of the choices resistance with depth? c) Vane Shear Test d) Pressuremeter Test 4. What is the most common method for obtaining undisturbed soil samples? a) Split-spoon sampler b) Shelby tube 5. What is the primary limitation of the Standard a) It cannot be used in cohesive soils b) It provides disturbed soil samples c) Auger boring d) Cone penetrometer Penetration Test (SPT)? c) It is not suitable for deep explorations d) It is expensive and time-consuming Part 3: Concept check. Answer the following questions briefly. 1. What is the difference between residual and transported soils? Provide an example of each. 2. Why is it important to consider the groundwater table during subsurface exploration? 3. What are the key differences between the Standard Penetration Test (SPT) and the Cone Penetration Test (CPT)? Part 4: Problem-Solving. Solve the following problems. Show all calculations. 1. A Standard Penetration Test (SPT) was conducted at a site, and the following blow counts were recorded: D Depth: 2 m, Blow count (N): 10 D Depth: 4 m, Blow count (N): 15 Depth: 6 m, Blow count (N): 20 0 The energy ratio is 60%, and the overburden correction factor CN is 1.1. Calculate the corrected N-values for each depth. 2. A soil sample was collected from a depth of 3 m using a Shelby tube. The sample had a volume of 0.01 m³ and a mass of 18 kg. If the water content is 12%, calculate the (a) bulk density, (b) dry density, and (c) void ratio of the soil. Assume the specific gravity of soil solids (Gs) is 2.65. 3. A Cone Penetration Test (CPT) was conducted at a site, and the following data was obtained: D Depth: 2 m, Cone resistance (qc): 5 MPa D Depth: 4 m, Cone resistance (qc): 8 MPa D Depth: 6 m, Cone resistance (qc): 12 MPa Estimate the soil type at each depth using typical qc correlations.

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