A SPT test was performed in a sandy soil layer (y = 115 pcf) at a depth of 16 ft. below the ground surface. The SPT blow counts were recorded as x-y-z, where x, y andz are the last three digits of student ID. The test was conducted using a safety hammer in a 6 in. diameter exploratory boring using a standard sampler with the linerinstalled. Compute energy-corrected N60. (N1)60 with overburden correction, angle of friction - ', and relative density Dr of soil. Assume D50 = 0.2 mm.FactorEquipment VariableTermCorrectionCE = ER/60 0.5 to 1.00)0.7 to 1.200.8 to 1.51)Donut HammerEnergyRatio%3DSafety HammerAutomatic HammerBorehole65 to 115 mmСв1.0Diameter150 mm1.05200 mm1.15SamplingmethodStandard samplerCs1.0Non-standard sampler1.1 to 1.3Rod Length 3 to 4 mCR0.754 to 6 m0.856 to 10 m10 to >30 m0.951.0'Values presented are for guidance only. Actual ER values should be measured per ASTMD 4633

The given data is: γ=115 pcf Depth=10 ft SPT blow counts=1, 6, 5 N value =6+5 =11

Answered: A SPT test was performed in a sandy…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A 6 in diameter exploratory boring has been drilled through a fine sand to a depth of 19 ft. An SPT N-value of 23 was obtained at this depth using a USA safety hammer with a stan-dard sampler. The boring then continued to greater depths, eventually encountering the groundwater table at a depth of 35 ft. The unit weight of the sand is unknown. ComputeN1,60, f′, and Dr at the test location, and use this data to classify the consistency of thesand.
Problem 2: A standard penetration test has been conducted on a coarse sand at a depth of 16 ft below the surface. The blow counts obtained in the field were as follows: 0-6 in. (4 blows), 6-12 in. (6 blows), and 12-18 in. (6 blows). The tests were conducted using a USA-style donut hammer in a 6 in. diameter boring using a standard sampler with the liner installed. The vertical effective stress at the test depth was 1500 lb.ft?. Determine N160.
Q2/A standard penetration test was performed in a 150 mm diameter borehole at a depth of 9.5 m below the ground surface. The driller used a UK-style automatic trip hammer, a standard SPT sampler and a 10-m drill rod. The blow counts obtained in the field were as follows: 0-150mm = 4 blows: 150-300mm = 7 blows; 300-450mm = 12 blows. The soil is normally consolidated fine sand with a unit weight of 18.0 kN/m³ and D50 = 0.4 mm. The ground water table is at a depth of 15 m. Compute: (a) N60, (b) (N1)60, (c) D.%, (d) , and (e) denseness of the fine sand.
A standard penetration test has been conducted on a coarse sand at a depth of 16 ft below the surface. The blow counts obtained in the field were as follows: 0-6 in. (4 blows), 6- 12 in. (6 blows), and 12-18 in. (6 blows). The tests were conducted using a USA-style donut hammer in a 6 in. diameter boring using a standard sampler with the liner installed. The vertical effective stress at the test depth was 1500 lb.ft'. Determine N1.
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. Compute the factor of safety against liquefaction of…
A standard penetration test was performed in a 150 mm diameter boring at a depth of 9.5 m be-low the ground surface. The driller used a UK-style automatic trip hammer and a standard SPT sampler. The actual blow count, N, was 19. The soil is a normally consolidated fine sand witha unit weight of 18.0 kN/m3 and D50 = 0.4 mm. The groundwater table is at a depth of 15 m. Determine the following:a. N60b. N1,60c. Drd. Consistency (based on Table 3.3)e. f′
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Soil please do both questions.
1. A standard penetration test was performed in a 150-mm diameter boring at a depth of 9.5 m below the ground surface. The driller used a UK-style automatic trip hammer and a standard SPT sampler. The actual blow count, N, was 19. The soil is a normally consolidated fine sand with a unit weight of 18.0 kN/m³ and D50 = 0.4 mm. The groundwater table is at a depth of 15 m. Compute the following: a. N60 b. (N₁)60 c. D, d. '
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 cyclic resistance ratio, CRR. Use this…
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…
Describe the procedure of he constant-rate-of-penetration test.

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