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 17, Problem 17.6P
To determine
Find the variation of relative density with depth using Meyerhof method.
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Determine the relative density at each depth using attached equation. Assume moderately compressible sand and hence Qc = 1.
Determine the relative density at each depth using attached equation. Assume moderately compressible sand and hence Qc = 1.
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Principles of Geotechnical Engineering (MindTap Course List)
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- In a deposit of normally consolidated dry sand a cone penetration test was conducted. Following are the result: Depth(m) Point resistance of cone, qc (MN/m²) 1.5 2.06 3.0 4.23 4.5 6.01 6.0 8.18 7.5 9.97 9.0 12.42 Assuming the dry unit weight of sand to be 16kN/m³, estimale the average peak friction angle, ф’, fo the sand. Use ф’=tan ¯1((0.38+0.27log(qc/ σ’o))arrow_forwardFollowing is the variation of the field standard penetration number in a sand deposit: The groundwater table is located at a depth of 6 . Given: the dry unit weight of sand from 0 to a depth of 6 is 16 , and the saturated unit weight of sand for depth 6 to 12 is 22.2 . Estimate an average peak soil friction angle. Use the equation (Enter your answer to three significant figures.)arrow_forwardRefer to Problem 3.5. Using Eq. (3.28), determine the averagerelative density of the sand. Assume it is a fine sand.Use Eq. (3.13) to obtain (N1)60.arrow_forward
- The following table gives the variation of the field standard penetration number in a sand deposit: The groundwater table is located at a depth of 12 . The dry unit weight of sand from 0 to a depth of 12 is 17.6 . Assume the mean grain size of the sand deposit to be about 0.8 . Estimate the variation of the relative density with depth for sand. Use the equation (Enter your answers to three significant figures.)arrow_forwardA standard penetration test was carried out in a normallyconsolidated sand at 25 ft depth where the N60 was determinedto be 28. The unit weight of the sand is 110 lb/ft3, andthe grain-size distribution suggests that D50 5 1.2 mm andCu 5 3.2. The age of the soil since deposition is approximately5000 years. Determine the relative density using thedifferent correlations discussed in Section 3.15arrow_forwardFollowing is the variation of the field standard penetration number in a sand deposit: The groundwater table is located at a depth of 6 . Given: the dry unit weight of sand from 0 to a depth of 6 is 18 , and the saturated unit weight of sand for depth 6 to 12 is 20.2 . Using the equation determine the average relative density of sand. (Enter your answer to three significant figures.) Average =arrow_forward
- A soil profile is shown in Figure P3.2 along with the standard penetration numbers in the clay layer. Use Eqs. (3.8) and (3.9) to determine the variation of cu and OCR with depth. What is the average value of cu and OCR?arrow_forwardRefer to Problem 3.19. Using Eq. (3.51), determine the variation of the relative density with depth. Use Qc = 1.arrow_forwardQ11: A silty sand of density index (ID or Dr) = 59% was subjected to standard penetration tests at a depth of 3 m. Groundwater level occurred at a depth of 1.5 m below the surface of the soil which was saturated throughout and had a unit weight of 19.3 kN/m³. The average N count was 15. During calibration of the test equipment, the energy applied to the top of the driving rods was measured as 350 Joules. Determine the (N₁) 60 value for the soil.arrow_forward
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