Homework 3 Site Investigation Following the site investigation carried out by GeoSearch Inc , you were asked to use the topographic map of the STL site and the boring logs (provided in Assignment 1) in order to prepare responses for the following questions The locations of the borings B 1 through B 4 are shown on the topographic map 1 Use the topographic map of the site and the boring logs to construct a site cross section A A' Project appropriate borings on the cross section Create a soil profile for the site by sketching the soil layers implied by the borings Use a dashed line to also indicate the final elevation of the building pad 2 The boring logs included uncorrected SPT blow counts from the field testing In the logs, SPT samples are marked with the following symbol These samples were retrieved with a 140 lb hammer dropping 30 inches The hammer was lifted and released by an automatic hammer, which delivers about 75 energy efficiency The split spoon sampler used in the tests did not have space for a liner The rod stickup was generally around 1 5 m Determine the N60 values for the site Then, determine the (N1)60 values for the site using the overburden correction factors (CN) suggested by Youd et al (2001) Use the unit weights selected in Assignment 1 for FM1 And FM2 layers (17 6 kN m3 for FM1 above GWT, 20 kN m3 for FM1 below GWT, and 16 8 kN m3 for FM2) Assume the unit weights of 19 kN m3 and 20 kN m3 for FM3 and FM4 layers, respectively After your calculations are complete, do the following a) For each boring, plot the measured raw N values, the N60 values and the (N1)60 values as a function of depth on the same figure (total of 4 figures, 1 figure per boring) Explain what you observe from this plot b) Create a table that looks exactly like the one below and report the raw N values, N60 values and (N1)60 values at the depths indicated Boring ID Depth Test ID Raw N N60 (N1)60 California State University, Long Beach CE 445 Department of Civil Engineering Construction Engineering Management Foundation Engineering 2 Note that N60 and (N1)60 values should always be rounded to the nearest whole number Make these rounding adjustments for N60 values prior to calculating (N1)60 values Ensure that you are actually rounding the N60 and (N1)60 values, not just displaying them with zero decimal places c) Estimate the values of the angle of internal resistance ' using the correlations by Hatanaka Uchida (1996) and Schmertmann (1975) Plot the values obtained from both correlations with depth on the same figure Prepare a total of 4 plots, 1 for each boring What are the average values of ' for the upper sand layer (FM3) and lower sand layer (FM4) 3 During the investigation you were asked to comment on the following questions about the clay samples that need to be sent to the lab a) Will you most likely obtain conservative or unconservative estimates of consolidation settlement from disturbed clay samples Briefly explain your answer b) Will you most likely obtain conservative or unconservative estimates of undrained shear strength from disturbed clay samples Briefly explain your answer Following the site investigation carried out by GeoSearch Inc , you were asked to use the topographic map of the STL site and the boring logs (provided in Assignment 1) in order to prepare responses for the following questions The locations of the borings B 1 through B 4 are shown on the topographic map 1 Use the topographic map of the site and the boring logs to construct a site cross section A A' Project appropriate borings on the cross section Create a soil profile for the site by sketching the soil layers implied by the borings Use a dashed line to also indicate the final elevation of the building pad Note that N60 and (N1)60 values should always be rounded to the nearest whole number Make these rounding adjustments for N60 values prior to calculating (N1)60 values Ensure that you are actually rounding the N60 and (N1)60 values, not just displaying them with zero decimal places Estimate the values of the angle of internal resistance using the correlations by Hatanaka Uchida (1996) and Schmertmann (1975) Plot the values obtained from both correlations with depth on the same figure Prepare a total of 4 plots, 1 for each boring What are the average values of for the upper sand layer (FM3) and lower sand layer (FM4) 2 The boring logs included uncorrected SPT blow counts from the field testing In the logs, SPT samples are marked with the following symbol 3 During the investigation you were asked to samples that need to be sent to the lab a) Will you most likely obtain conservative or unconservative estimates of consolidation settlement from disturbed clay samples Briefly explain your answer b) Will you most likely obtain conservative or unconservative estimates of undrained shear strength from disturbed clay samples Briefly explain your answer These samples were retrieved with a 140lb hammer dropping 30 inches The hammer was lifted and released by an automatic hammer, which delivers about 75 energy efficiency The split spoon sampler used in the tests did not have space for a liner The rod stickup was generally around 1 5m Determine the N60 values for the site Then, determine the (N1)60 values for the site using the overburden correction factors (CN) suggested by Youd et al (2001) Use the unit weights selected in Assignment 1 for FM1 And FM2 layers ( 17 6kN m3 for FM1 above GWT, 20 kN m3 for FM1 below GWT, and 16 8kN m3 for FM2) Assume the unit weights of 19kN m3 and 20kN m3 for a) For each boring, plot the measured raw N values, the N60 values and the (N1)60 values as a function of depth on the same figure (total of 4 figures, 1 figure per boring) Explain what you observe from this plot b) Create a table that looks exactly like the one below and report the raw N values, N60 values and (N1)60 values at the depths indicated Following the site investigation carried out by GeoSearch Inc , you were asked to use the topographic map of the STL site and the boring logs (provided in Assignment 1) in order to prepare responses for the following questions The locations of the borings B 1 through B 4 are shown on the topographic map 1 Use the topographic map of the site and the boring logs to construct a site cross section A A' Project appropriate borings on the cross section Create a soil profile for the site by sketching the soil layers implied by the borings Use a dashed line to also indicate the final elevation of the building pad Note that N60 and (N1)60 values should always be rounded to the nearest whole number Make these rounding adjustments for N60 values prior to calculating (N1)60 values Ensure that you are actually rounding the N60 and (N1)60 values, not just displaying them with zero decimal places Estimate the values of the angle of internal resistance using the correlations by Hatanaka Uchida (1996) and Schmertmann (1975) Plot the values obtained from both correlations with depth on the same figure Prepare a total of 4 plots, 1 for each boring What are the average values of for the upper sand layer (FM3) and lower sand layer (FM4) 2 The boring logs included uncorrected SPT blow counts from the field testing In the logs, SPT samples are marked with the following symbol 3 During the investigation you were asked to samples that need to be sent to the lab a) Will you most likely obtain conservative or unconservative estimates of consolidation settlement from disturbed clay samples Briefly explain your answer b) Will you most likely obtain conservative or unconservative estimates of undrained shear strength from disturbed clay samples Briefly explain your answer These samples were retrieved with a 140lb hammer dropping 30 inches The hammer was lifted and released by an automatic hammer, which delivers about 75 energy efficiency The split spoon sampler used in the tests did not have space for a liner The rod stickup was generally around 1 5m Determine the N60 values for the site Then, determine the (N1)60 values for the site using the overburden correction factors (CN) suggested by Youd et al (2001) Use the unit weights selected in Assignment 1 for FM1 And FM2 layers ( 17 6kN m3 for FM1 above GWT, 20 kN m3 for FM1 below GWT, and 16 8kN m3 for FM2) Assume the unit weights of 19kN m3 and 20kN m3 for a) For each boring, plot the measured raw N values, the N60 values and the (N1)60 values as a function of depth on the same figure (total of 4 figures, 1 figure per boring) Explain what you observe from this plot b) Create a table that looks exactly like the one below and report the raw N values, N60 values and (N1)60 values at the depths indicated

Question

Homework 3  Site Investigation Following the site investigation carried out by GeoSearch Inc , you were asked to use the topographic map of the STL site and the boring logs (provided in Assignment  1) in order to prepare responses for the following questions  The locations of the borings B 1 through B 4 are shown on the topographic map  1  Use the topographic map of the site and the boring logs to construct a site cross section A A'  Project appropriate borings on the cross section  Create a soil profile for the site by sketching the soil layers implied by the borings  Use a dashed line to also indicate the final elevation of the building pad  2  The boring logs included uncorrected SPT blow counts from the field testing  In the logs, SPT samples are marked with the following symbol  These samples were retrieved with a 140 lb hammer dropping 30 inches  The hammer was lifted and released by an automatic hammer, which delivers about 75  energy efficiency  The split spoon sampler used in the tests did not have space for a liner  The rod stickup was generally around 1 5 m  Determine the N60 values for the site  Then, determine the (N1)60 values for the site using the overburden correction factors (CN) suggested by Youd et al  (2001)  Use the unit weights selected in Assignment  1 for FM1 And FM2 layers (17 6 kN m3 for FM1 above GWT, 20 kN m3 for FM1 below GWT, and 16 8 kN m3 for FM2)  Assume the unit weights of 19 kN m3 and 20 kN m3 for FM3 and FM4 layers, respectively  After your calculations are complete, do the following  a) For each boring, plot the measured raw N values, the N60 values and the (N1)60 values as a function of depth on the same figure (total of 4 figures, 1 figure per boring)  Explain what you observe from this plot  b) Create a table that looks exactly like the one below and report the raw N values, N60 values and (N1)60 values at the depths indicated  Boring ID Depth Test ID Raw N N60 (N1)60 California State University, Long Beach CE 445 Department of Civil Engineering   Construction Engineering Management Foundation Engineering 2 Note that N60 and (N1)60 values should always be rounded to the nearest whole number  Make these rounding adjustments for N60 values prior to calculating (N1)60 values  Ensure that you are actually rounding the N60 and (N1)60 values, not just displaying them with zero decimal places  c) Estimate the values of the angle of internal resistance ' using the correlations by Hatanaka   Uchida (1996) and Schmertmann (1975)  Plot the values obtained from both correlations with depth on the same figure  Prepare a total of 4 plots, 1 for each boring  What are the average values of ' for the upper sand layer (FM3) and lower sand layer (FM4)  3  During the investigation you were asked to comment on the following questions about the clay samples that need to be sent to the lab  a) Will you most likely obtain conservative or unconservative estimates of consolidation settlement from disturbed clay samples  Briefly explain your answer  b) Will you most likely obtain conservative or unconservative estimates of undrained shear strength from disturbed clay samples  Briefly explain your answer Following the site investigation carried out by GeoSearch Inc , you were asked to use the topographic map of the STL site and the boring logs (provided in Assignment  1) in order to prepare responses for the following questions  The locations of the borings B 1 through B 4 are shown on the topographic map  1  Use the topographic map of the site and the boring logs to construct a site cross section A A'  Project appropriate borings on the cross section  Create a soil profile for the site by sketching the soil layers implied by the borings  Use a dashed line to also indicate the final elevation of the building pad  Note that N60 and (N1)60 values should always be rounded to the nearest whole number  Make these rounding adjustments for N60 values prior to calculating (N1)60 values  Ensure that you are actually rounding the N60 and (N1)60 values, not just displaying them with zero decimal places  Estimate the values of the angle of internal resistance using the correlations by Hatanaka    Uchida (1996) and Schmertmann (1975)  Plot the values obtained from both correlations with depth on the same figure  Prepare a total of 4 plots, 1 for each boring  What are the average values of for the upper sand layer (FM3) and lower sand layer (FM4)  2  The boring logs included uncorrected SPT blow counts from the field testing  In the logs, SPT samples are marked with the following symbol  3  During the investigation you were asked to samples that need to be sent to the lab  a) Will you most likely obtain conservative or unconservative estimates of consolidation settlement from disturbed clay samples  Briefly explain your answer  b) Will you most likely obtain conservative or unconservative estimates of undrained shear strength from disturbed clay samples  Briefly explain your answer  These samples were retrieved with a 140lb hammer dropping 30 inches  The hammer was lifted and released by an automatic hammer, which delivers about 75  energy efficiency  The split spoon sampler used in the tests did not have space for a liner  The rod stickup was generally around 1 5m  Determine the N60 values for the site  Then, determine the (N1)60 values for the site using the overburden correction factors (CN) suggested by Youd et al  (2001)  Use the unit weights selected in Assignment  1 for FM1 And FM2 layers ( 17 6kN m3 for FM1 above GWT, 20 kN m3 for FM1 below GWT, and 16 8kN m3 for FM2)  Assume the unit weights of 19kN m3 and 20kN m3 for a) For each boring, plot the measured raw N values, the N60 values and the (N1)60 values as a function of depth on the same figure (total of 4 figures, 1 figure per boring)  Explain what you observe from this plot  b) Create a table that looks exactly like the one below and report the raw N values, N60 values and (N1)60 values at the depths indicated  Following the site investigation carried out by GeoSearch Inc , you were asked to use the topographic map of the STL site and the boring logs (provided in Assignment  1) in order to prepare responses for the following questions  The locations of the borings B 1 through B 4 are shown on the topographic map  1  Use the topographic map of the site and the boring logs to construct a site cross section A A'  Project appropriate borings on the cross section  Create a soil profile for the site by sketching the soil layers implied by the borings  Use a dashed line to also indicate the final elevation of the building pad  Note that N60 and (N1)60 values should always be rounded to the nearest whole number  Make these rounding adjustments for N60 values prior to calculating (N1)60 values  Ensure that you are actually rounding the N60 and (N1)60 values, not just displaying them with zero decimal places  Estimate the values of the angle of internal resistance using the correlations by Hatanaka    Uchida (1996) and Schmertmann (1975)  Plot the values obtained from both correlations with depth on the same figure  Prepare a total of 4 plots, 1 for each boring  What are the average values of for the upper sand layer (FM3) and lower sand layer (FM4)  2  The boring logs included uncorrected SPT blow counts from the field testing  In the logs, SPT samples are marked with the following symbol  3  During the investigation you were asked to samples that need to be sent to the lab  a) Will you most likely obtain conservative or unconservative estimates of consolidation settlement from disturbed clay samples  Briefly explain your answer  b) Will you most likely obtain conservative or unconservative estimates of undrained shear strength from disturbed clay samples  Briefly explain your answer  These samples were retrieved with a 140lb hammer dropping 30 inches  The hammer was lifted and released by an automatic hammer, which delivers about 75  energy efficiency  The split spoon sampler used in the tests did not have space for a liner  The rod stickup was generally around 1 5m  Determine the N60 values for the site  Then, determine the (N1)60 values for the site using the overburden correction factors (CN) suggested by Youd et al  (2001)  Use the unit weights selected in Assignment  1 for FM1 And FM2 layers ( 17 6kN m3 for FM1 above GWT, 20 kN m3 for FM1 below GWT, and 16 8kN m3 for FM2)  Assume the unit weights of 19kN m3 and 20kN m3 for a) For each boring, plot the measured raw N values, the N60 values and the (N1)60 values as a function of depth on the same figure (total of 4 figures, 1 figure per boring)  Explain what you observe from this plot  b) Create a table that looks exactly like the one below and report the raw N values, N60 values and (N1)60 values at the depths indicated

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Homework 3. Site Investigation Following the site investigation carried out by GeoSearch Inc., you were asked to use the topographic map of the STL site

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