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 Dso = 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. H

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 Dso = 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. H

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

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:
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.
Do it right now
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.
The blow counts for an SPT test at a depth of 6 m in a coarse-grained soil at every 0.152 m are 10, 10 and 10. A donut automatic trip hammer and a standard sampler were used in a borehole 152 mm in diameter. The SPT N value is: O 1.8 O 2.5 O 3.20 O 4. 10
An Osterberg load test is to be conducted on a 60 in diameter, 75 ft long drilled shaft. The expected nominal side friction capacity is 2,000 lb/ft2 and the expected nominal net toe bearing capacity is 60,000 lb/ft2. (a) Determine the optimal jack location such that the load capacity above the jack is equal to that below the jack. (b) Compute the required jack capacity.
A standard penetration test has been conduted at a depth of 15 ft in an 8-inch diameter exploratory boring using a USA-style safety hammer and a standard sampler. This test produced an uncorrected N-value of 12. The soil inside the sampler was a fine-to-medium sand 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 soil using Table 3.3.
Solve using 3 methods: 1 - Bazaraa Method 2 - Peck method 3 - Liao - Whitman method
Earth Sciences Downward force is 4000 kg and rotational force is 3000 kg. Contact surface area (cross sectional area) is 100 cm2. Also, the rock sample (diameter: 20 cm) is tested by a uniaxial compressive strength machine and the sample was cracked at 30000 kg. Answer the following questions:a. Find the resultant force acting on the rock formation.b. Find the bearing strength of the rock drilled.c. Can we drill under these circumstances?