Question 2:* A soil sample 10 cm in diameter is placed In a tube 1 m long. A constant supply of water is allowed toflow into one end of the soil at A and the outflow at B is collected by a beaker. The average amount ofwater collected is 1 cubic centimeter every 10 seconds. The tube is inclined and has a head differenceof 1.2 m. Determine the followingo Hydraulic Gradiento Seepage velocity if porosity is 0.375o Hydraulic conductivityFlow RateDischarge Velocity

Given data: Diameter =10 cm length =1 m amount of water collected =1 cm3 time=10 sec head…

Answered: Question 2: * A soil sample 10 cm in…

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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Problem (5) A layered soil is shown in following figure. a) Estimate the hydraulic conductivity for flow in the vertical direction. b) Estimate the equivalent hydraulic conductivity for flow in horizontal direction. c) calculate the ratio of ky(eg) /kh(eq) 1 m k = 10-3 cm/sec 1 m k = 2 × 10-4 cm/sec 1 m k = 10 cm/sec 1 m k = 2 × 10¬³ cm/sec
Assuming the groundwater table is at ground surface and the soil bulk unit weight is 20kN/m3. At 2m depth below ground level. The pore water pressure is approximately: O a. 19.6 kPa O b. 9.8 kPa O c. 200 kPa O d. 98 kPa
1. During Atterberg limit tests in the soil mechanics laboratory, the students obtained the following results from a clayey soil. Liquid limit tests: Number of Moisture blows, N content (%) 14 38.4 16 36.5 20 33.1 28 270 Plastic limit tests: Students conducted two trials and found that PL = 172% for the first trial and PL = 17.8% for the second trial. a. Draw the flow curve and obtain the liquid limit. b. What is the plasticity index of the soil? Use an average value of PL from the two plastic limit trails.
The hydraulic conductivity of a soil sample (3.4 x 10-4 cm/s) has been determined via a permeability test. The water temperature was 28°C at the time of experiment. What is the hydraulic conductivity of the sample at the standard temperature of 20°C?
Answer Question 7
4. A constant-head permeability test was conducted on a soil sample retained inside a cylindrical mould with a length of 40cm and an inner diameter of 18cm. In the test setup, a total of 55cm³ of water was collected during 3 hours and 15 minutes after reaching a constant-head difference of 60cm. a. Calculate the hydraulic conductivity (cm/s) of the soil sample. b. Estimate the type and permeability class of the soil. (Show all working calculations.)
Soil mechanics
The results of a constant-head permeability test for a fine sand sample having a diameter of 70 mm and a length of 140 mm are as follows (refer to Figure 7.5):• Constant-head difference = 550 mm• Water collected in 7 min = 450 cm3• Void ratio of sand = 0.8Determine:a. Hydraulic conductivity, k (cm/sec)b. Seepage velocity
In a constant head permeability test in the laboratory as shown in Figure Q2(e), the data is recorded in Table Q2(b). The void ratio of the soil specimen is 0.46. Determine; (i) Hydraulic conductivity, k, of the soil in cm/sec. (ii) Discharge velocity in cm/sec.
A cylindrical soil sample with length = 15cm and diameter = 4cm was taken from a site where a groundwater contamination piume was found. The sample was tested in the lab to determine its hydraulic conductivity. A hydraulic gradient of 0.05 was applied across the sample, and a flow rate of 0.025 cm³/sec was measured. Calculate the hydraulic conductivity of the soil sample using Darcy's law.
(CE Board Exam November 2018) An experiment to determine the permeability of a soil sample was conducted. The permeameter in a falling head permeability test set-up involves a cylindrical soil sample 100mm in diameter and a height of 200mm. The hydraulic head in the 10-mm diameter standpipe through which the test water passed drop from 1m to 600mm in one minute of observation. In that duration, the water collected in the graduate was recorded at 2L. From these data, a. Evaluate the coefficient of permeability of the soil sample in cm/sec b. Determine the time it takes for the water to drop from 1meter to 750mm c. What will be the hydraulic head in the standpipe after 2 minutes
For a falling head permeability test, the following values are given: Length of specimen: 200 mm Area of specimen:1000 sq. mm Area of standpipe: 40 sq. mm Head difference at t= 0: 500 mm Head difference at t= 180 sec : 300 mm Determine the hydraulic conductivity (cm/sec)

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