TABLE 3.3 CONSISTENCY OF COARSE-GRAINEDSOILS VARIOUS RELATIVE DENSITIES (Adaptedfrom Lambe and Whitman, 1969)Relative Density, D, (%)0-1515-3535-6565-8585-100ClassificationVery looseLooseMedium denseDenseVery dense"Lambe and Whitman used the term "medium." but "medium dense"is better because "medium" usually refers to the grain size distribu-tion. A standard penetration test has been conduted at a depth of 15 ft in an 8-inch diameterexploratory boring using a USA-style safety hammer and a standard sampler. This testproduced an uncorrected N-value of 12. The soil inside the sampler was a fine-to-mediumsand with Dsq = 0.6 mm. The vertical effective stress at this depth is 1100 lb/ft². Adjust the N-value as described in Class handout, then compute the relative density and classify the soilusing Table 3.3.

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TABLE 3.3 CONSISTENCY OF COARSE-GRAINED SOILS VARIOUS RELATIVE DENSITIES (Adapted from Lambe and Whitman, 1969) Relative Density, D, (%) 0-15 15-35 35-65 65-85 85-100 Classification Very loose Loose Medium dense Dense Very dense "Lambe and Whitman used the term "medium," but "medium dense" is better because "medium" usually refers to the grain size distribu- tion.

TABLE 3.3 CONSISTENCY OF COARSE-GRAINED SOILS VARIOUS RELATIVE DENSITIES (Adapted from Lambe and Whitman, 1969) Relative Density, D, (%) 0-15 15-35 35-65 65-85 85-100 Classification Very loose Loose Medium dense Dense Very dense "Lambe and Whitman used the term "medium," but "medium dense" is better because "medium" usually refers to the grain size distribu- tion.

Principles of Foundation Engineering (MindTap Course List)

9th Edition

ISBN:9781337705028

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter3: Natural Soil Deposits And Subsoil Exploration

Section: Chapter Questions

Problem 3.14P

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In the above figure, the standard penetration test was carried out at a depth of z = 2 m on the sand ground under the foundation base and the obtained SPT N60 value was determined as 21. Calculate the corrected (N1) 60 value at z = 2m depth under the foundation base.At the same time, calculate the elastic settlement in the center of the foundation, the value of Se, using the elastic theory and Hooke's rule on the sand ground in the figure.Take the average Es value for the whole sand layer as 12000 kN / m2. Take the value of the depth factor If as 0.85. According to the results you have calculated, which of the following (N1) gives the values of 60 and elastic settlement, Se.
A sand deposit has been identified beneath a site located adjacent to a river. The sand deposit is 15 feet thick and the top of the layer is 12 feet below the ground surface and overlain by a very stiff clay and is undertain by bedrock. The water level has been measured to be at a depth of 10 feet. The standard penetration resistance of the layer has been determined to be 12 blows per foot and a standard sampler was used; a drill rig with a safety hammer with an efficiency of 60% was used. The length of the drill rod is 10 meters and the borehole diameter is 5 inches (127 mm). The design earthquake has been designated as a moment magnitude 6-3/4 event on a nearby fault and the maximum ground acceleration is expected to be 0.40 g. The wet unit weight of the clay soils is 150 pounds per cubic foot and the wet unit weight of the sand soils is 180 pounds per cubic foot. The sands have 35% fines content according to a grain size analysis. Determine the cyclic stress ratio, CSR. Express your…
A sand deposit has been identified beneath a site located adjacent to a river. The sand deposit is 15 feet thick and the top of the layer is 12 feet below the ground surface and overlain by a very stiff clay and is undertain by bedrock. The water level has been measured to be at a depth of 10 feet. The standard penetration resistance of the layer has been determined to be 12 blows per foot and a standard sampler was used: a drill rig with a safety hammer with an efficiency of 60% was used. The length of the drill rod is 10 meters and the borehole diameter is 5 inches (127 mm). The design earthquake has been designated as a moment magnitude 6-3/4 event on a nearby fault and the maximum ground acceleration is expected to be 0.40 g The wet unit weight of the clay soils is 150 pounds per cubic foot and the wet unit weight of the sand soils is 180 pounds per cubic foot. The sands have 35% fines content according to a grain size analysis. Compute the factor of safety against liquefaction of…
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Define the Normalized Tip Resistance of Drilled Shafts in Sand (Ghionna et al. 1994) ?
A sand deposit has been identified beneath a site located adjacent to a river. The sand deposit is 15 feet thick and the top of the layer is 12 feet below the ground surface and overlain by a very stiff clay and is underlain by bedrock. The water level has been measured to be at a depth of 10 feet. The standard penetration resistance of the layer has been determined to be 12 blows per foot and a standard sampler was used; a drill rig with a safety hammer with an efficiency of 60% was used. The length of the drill rod is 10 meters and the borehole diameter is 5 inches (127 mm). The design earthquake has been designated as a moment magnitude 6-3/4 event on a nearby fault and the maximum ground acceleration is expected to be 0.40 g. The wet unit weight of the clay soils is 150 pounds per cubic foot and the wet unit weight of the sand soils is 180 pounds per cubic foot. The sands have 35% fines content according to a grain size analysis. Determine the magnitude scaling factor, MSF. Express…
Solve only if you are 100 % sure, else allow other experts to do , otherwise i will downvote The following series of standard penetration test (SPT) results was obtained in an 18-ft thick stratum of relatively uniform silty sand:
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According to the drilling works carried out on an area, 50 meters thick clay and an underlying rock mass were found. The groundwater level was measured to be 5 meters deepfrom the surface. As a result of the experiments, the effective cohesion and internal friction angle of the clay is 20 kPa and 25°, respectively. The dry and saturated unit weight was found to be 18 kN/m3 and 20 kN/m3, respectively. Calculate the effective vertical stress and the shear stress at a depth of 20 meters based on the information given
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