The following results were recorded during a Falling head permeability test: Sample diameter = 120 mm Sample length = 140 mm Initial head = 510 mm Final head = 310 mm Standpipe diameter = 6 mm Duration of flow = 3.4 mins Determine the coefficient of permeability for the soil in m/s. Based on the coefficient of permeability estimate the soil type

The following results were recorded during a Falling head permeability test: Sample diameter = 120 mm Sample length = 140 mm Initial head = 510 mm Final head = 310 mm Standpipe diameter = 6 mm Duration of flow = 3.4 mins Determine the coefficient of permeability for the soil in m/s. Based on the coefficient of permeability estimate the soil type

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter4: Plasticity And Structure Of Soil

Section: Chapter Questions

Problem 4.5P: The following data were obtained by conducting liquid limit and plastic limit tests on a soil...

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FUNDAMENTALS OF GEOTECHNICAL ANALYSIS A constant head permeability test is performed on soil that is 2 cm x 2 cm square, and 2.5cm long. The head difference applied during the test is 20 cm and 7 cm3 is collected over a time of 100 sec. Provide step by step solution. a) Compute the permeability based on these test conditions and results. b) A falling head test is conducted on the same soil specimen at the same time (t1 – t2 = 100 sec), and the standpipe diameter is 0.8 cm. If the average head during the test should be 18 cm, what are h1 and h2 values?
A falling head permeability test is conducted on silty soil. The sample diameter is 10.0 cm and its length or thickness is 6 cm. The diameter of the standpipe is 6.0 mm. The head at the start of the test is 58 cm. The test lasts 9 min and the head falls to 38 cm. Find the coefficient of permeability of this soil. The answer must be in 6 decimal places. Use units cm/sec. Provide step by step solution.
A liquid limit test performed on a soil sample has the following results, compute for the value of the flow index. No. of blows Moisture content 20 40.8% 28 39.1%
Determine the coefficient of permeability of the soil. For a falling- head permeability test, the following are given: re Length of the specimen = 115.5 mm Diameter of soil specimen =104.7 mm Diameter of the stand pipe = 15 mm Head difference at time t=0 is 1360 mr Head difference at timet=78600 sec is 820 mm
A falling head permeability test is conducted on silty soil. The sample diameter is 10.0 cm and its length or thickness is 6 cm. The diameter of the standpipe is 6.0 mm. The head at the start of the test is 58 cm. The test lasts 9 min and the head falls to 38 cm. Find the coefficient of permeability of this soil. The answer must be in 6 decimal places. Use units cm/sec.
Problem Set 4 4. The following data were obtained from the liquid and plastic limit tests for a soil: Liquid Limit Test: Number of blows (N) Molsture content (%) a) Draw the flow curve from the liquid limit test data and find the liquid limit. (use excel to graph) b) What is the plasticity index of 17 42.1 22 38.2 27 36.2 32 34.1 Plastic Limit Test: Moisture content = 21.3% the soil?
2. The coefficient of permeability for a fine-grained soil is determined in the laboratory by use of a falling head test. Test conditions and results are as indicated below. Determine the coefficient of permeability, then indicate the probable soil classification. - Length of soil sample = 150mm - Cross-sectional area of standpipe = 200mm2 - Cross-sectional area of soil sample = 1,140mm2 - At the start of the test, the water level in the supply standpipe is 0.95m above the top of the permeameter. - %3D Draw the sketch. Reference Table for Soil Classification Soil Type k, Coefficient of Permeability (mm/sec) Clean Gravel 10 - 100 Clean Sand and Gravel mixture none Fine sand.silt 10-2 to 10-4 Sand Silt Clay 10-3 to 10-6 Glacial < 10-6
Homework 1-Results from liquid and plastic limit tests conducted on a soil are Moisture given below. Plastic limit tests: PL 13.4% a) Draw the flow curve and obtain the liquid limit. b) What is the plasticity index of the soil? C) Determine the liquidity index of the soil if Win situ = 32% Number of blows, N content (%) 39.2 %3D 15 34.5 22 26 31.2 29.0 %3D 29 U.S. sieve no. Mass of soil retained 1- The followi
The following data were obtained by conducting liquid limit and plastic limit tests on a soil collected from the site. Liquid limit tests: Number of blows, N 15 21 29 38 Moisture content (%) 39.5 37.9 36.4 35.1 Plastic limit test: PL = 19.3% a. Draw the flow curve and determine the liquid limit. b. Using the Casagrande plasticity chart (Figure 4.21), determine the soil type.
A liquid limit test performed on a soil sample has the following results, compute for the approximate value of the liquid limit. Round off your answer to two (2) decimal places. No. of blows = 20 Moisture content = 40.8%
ctivity 3 Problem Set Questions Liquid Limit and Plastic Limit Tests were conducted on a soil given the data below. PL = 13.4%. Draw the flow curve |and obtain the Liquid Limit. Also, what is the Plasticity Index of this soil? Number of blows, N Moisture content (%) 14 38.4 16 36.5 20 33.1 28 27.0
FUNDAMENTALS OF GEOTECHNICAL ANALYSIS A constant head permeability test is performed on soil that is 2 cm x 2 cm square, and 2.5cm long. The head difference applied during the test is 20 cm and 7 cm3 is collected over a time of 100 sec. a) Compute the permeability based on these test conditions and results. b) A falling head test is conducted on the same soil specimen at the same time (t1 – t2 = 100 sec), and the standpipe diameter is 0.8 cm. If the average head during the test should be 18 cm, what are h1 and h2 values?