In a laboratory falling head test, the recorded data are as below: Diameter of the tube = 20 mm Diameter of the cell = 100 mm Length of the sample = 1000 mm The head measured from the top level of the sample dropped from 800 mm to 600 mm within 1 hr and the temperature of the water was 30°C. The coefficient of permeability of the soil at 20°C is dynamic viscosity of water at 20°C = 1.005 × 103 N-s/m2 and the dynamic viscosity at 30°C = 0.801 × 10 3 N-s/m²). %3D (Take

In a laboratory falling head test, the recorded data are as below: Diameter of the tube = 20 mm Diameter of the cell = 100 mm Length of the sample = 1000 mm The head measured from the top level of the sample dropped from 800 mm to 600 mm within 1 hr and the temperature of the water was 30°C. The coefficient of permeability of the soil at 20°C is dynamic viscosity of water at 20°C = 1.005 × 103 N-s/m2 and the dynamic viscosity at 30°C = 0.801 × 10 3 N-s/m²). %3D (Take

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 cylindrical soil sample 50 mm in diameter and 200 mm in height is used as thepermeameter in a falling head permeability test setup. In one minute of observation, thehydraulic head in the 10 mm diameter standpipe through which test water went reducedfrom 900mm to 500 mm. During that time, 1.5 liters of water were collected in the graduate. Calculate the soil sample's permeability coefficient in cm/s.
A constant-head permeability test is performed in a laboratory where the soil sample is 25 cm in length and 6 cm2 in cross section. The height of water is maintained at 2 ft at the inflow end and 6 in. at the outlet end. The quantity of water flowing through the sample is 200 ml in 2 minutes. (a) Make a sketch of the described conditions. (b) What is the coefficient of permeability in millimeters per minute?
1. A constant head permeability test is conducted on a certain soil. The diameter of the sample is 7.5 cm, length is 20 cm, and the constant head is 42 cm. The mass of water collected in 64 seconds is 88 grams. Solve for the coefficient of permeability in cm/min.
Subj- civil Q. An undisturbed soil sample that is cylindrical in shape and measures 3 in (76.2 mm) in diameter by 6 in (152.4 mm) in length after oven drying weighs 2.57 lb (1.166 kg bulk) as opposed to 3.04 lb (1.38 kg mass). What are the densities and the weights in (a) wet and dry units? Additionally, find out the moisture content.
The falling head permeability test was performed in a permeameter with an inside diameter of 6 cm. the inside diameter of the standpipe is 3 mm. The sample has a length of 12 cm. during the period of 8 min, the head of the sample decreased from 120 cm to 60 cm. compute the coefficient of permeability of the sample in cm/s
In a falling head permeameter, the sample used is 25 cm long having a cross-sectional area of 24 cm2. The cross-sectional area of the standpipe is 2 cm2. The sample of soil is made of three layers perpendicular to the direction of the flow. The thickness of the top layer is 8 cm and has a value of k1 = 4 x 10-4 cm/sec, the second layer of thickness 10 cm has k2 = 6 x 10-4 cm/sec, and the bottom layer of thickness 7 cm has k3 = 8 x 10-4 cm/sec. Calculate the time required for a drop of head from 25 to 12 cm. ( in minutes).
02. In the soil mechanics laboratory of UCONTI, the following masses were obtained: Wet sample weight + container weight = 148.9 gr. Dry sample weight + container weight = 112.8 gr. Sample container weight = 38.6 gr. Calculate the moisture content of the sample
In an experiment to calibrate the Hydra Probe soil moisture meter by volume the results were as follows: The first reading of the device = 15% and the reading of the sample in the laboratory = 12% The second reading of the device is 30%, and the sample reading in the laboratory = 24% Write down the instrument calibration equation, use the x-axis for lab readings
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?
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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%
A laboratory test was conducted according to the procedure described previously. The following data were obtained: Mass of dish coated with petroleum jelly, MT = 11.30 g Mass of dish coated with petroleum jelly plus wet soil, Mw = 38.51 g Mass of dish coated with petroleum jelly plus oven-dried soil, MD = 32.81 g Volume of wet soil pat (same as volume of shrinkage dish), V = 15.26 cm3 Volume of oven-dried soil pat, Vo = 12.83 cm3 18. Compute the void ratio when the soil has a moisture content of 14%