A constant head permeameter, 85 mm in diameter containing fine sand sample 450 mm long, allowed water to flow at a rate of 184mL/min under steady flow conditions. Given the difference in head between two points 240 mm apart was 375 mm, determine thecoefficient of permeability in mm/s. When the same sample size is tested in a falling head apparatus using a stand-pipe of 32.5 mmdiameter, calculate the time required for the water in the stand-pipe to drop from 1750 mm to 1000 mm above the outflow level.

Answered: Image /qna-images/answer/8fcc3209-c51c-4ee7-808c-d44c1dcc65f6.jpg

constant head permeameter, 85 mm in diameter containing fine sand sample 450 mm long, allowed water to flow at a rate of 184 L/min under steady flow conditions. Given the difference in head between two points 240 mm apart was 375 mm, determine the pefficient of permeability in mm/s. When the same sample size is tested in a falling head apparatus using a stand-pipe of 32.5 mm iameter, calculate the time required for the water in the stand-pipe to drop from 1750 mm to 1000 mm above the outflow level.

constant head permeameter, 85 mm in diameter containing fine sand sample 450 mm long, allowed water to flow at a rate of 184 L/min under steady flow conditions. Given the difference in head between two points 240 mm apart was 375 mm, determine the pefficient of permeability in mm/s. When the same sample size is tested in a falling head apparatus using a stand-pipe of 32.5 mm iameter, calculate the time required for the water in the stand-pipe to drop from 1750 mm to 1000 mm above the outflow level.

Principles of Geotechnical Engineering (MindTap Course List)

9th Edition

ISBN:9781305970939

Author:Braja M. Das, Khaled Sobhan

Publisher:Braja M. Das, Khaled Sobhan

Chapter7: Permeability

Section: Chapter Questions

Problem 7.17P

See similar textbooks

Related questions

Q: A course sand sample is placed in the constant permeameter test. Water passes through the sample…

A: Given: The constant head is 40 cm. The time interval is 0.00167 hr. The mass of water is 40 g. The…

Q: Q.2(a) In a falling head permeability test on a 120 mm high and 100 mm diameter cylindrical sample,…

A: Falling head permeability test is used to find the permeability of fine grained soil. Given:…

Q: From the constant head permeability test arrangement shown, the following values are given: Void…

Q: A course sand sample is placed in the constant permcameter test. What is the coefficient of…

Q: A sample of sand, 5 cm in diameter and 15 cm long, was prepared at a porosity of 60% in a…

Q: a. The hydraulic head in the 1.1 cm diameter standpipe through which test water passed dropped from…

A: Given:- The hydraulic head in the 1.1 cm diameter standpipe through which test water passed dropped…

Q: A glass cylinder 5 cm internal diameter and with a screen at the bottom was used as a falling head…

Q: A sample of sand 5 cm in diameter and 15 cm long, was prepared at a porosity of 60% in a…

Q: P 4: A sand sample of 35cm2 cross sectional area and 20cm long was tested in a constant head…

A: Cross-sectional Area = 35 cm2 Length = 20cm Head = H = 60cm Discharge = 120mL in 6min or .33cm/sec…

Q: A sample of sand, 5 cm in diameter and 15 cm long, was prepared at a porosity of 60% in a…

A: Diameter = d = 5cm Length = L = 15cm ∆H = 30cm V = 40cm3 t = 5sec

Q: 2. A constant head laboratory permeability test an a fines and gives the following values Length of…

Q: For a falling head permeability test, these value are given:  Length of the soil specimen = 200 mm…

A: Given, Length of the soil specimen, L= 200 mmArea of the soil specimen, A= 1000 mm2Area of the…

Q: In a falling head permeability test on a 120 mm high and 100 mm diameter cylindrical sample, the…

Q: The results of a constant-head permeability test for a sand sample having a sectional area of…

A: Using Darcy's law

Q: Prob. A falling head permeability test was performed on a sample of silty sand. The time required…

Q: A cylindrical soil sample 50 mm in diameter and 200 mm in height is used as the permeameter in a…

Q: HYDRAULIC CONDUCTIVITY PROBLEM 1: The results of a constant head permeability test for a fine sand…

Q: A constant head test is performed using a permeameter in the laboratory. The graduated cylinder…

A: Note:- Hi! Thank you for the question As per the honor code, We’ll answer the first question since…

Q: PART IV: P ERMEABILITY PROBLEM A For a constant head laboratory test on a fine s and, the following…

A: Given data: Length of the specimen (L) = 14' Diameter of the specimen (d) = 3.25' Head difference…

Q: In a constant head permeability test, the length of the specimen is 150 mm and the cross sectional…

Q: area and 20 cm constant head p of 60 km, the di The dry unit wei was 1120 g. and

Q: PROBLEM 2: During a constant-head permeability test on a sand sample, 260 x 10° mm of water were…

Q: A falling head permeability test was run on a soil sample 9.60cm in diameter and 10cm long. The head…

Q: The results of a constant-head permeability test for a fine sand sample having a diameter of 70 mm…

A: Constant head test is used to find the permeability of the soil. This test is used for the…

Q: Question 2 * The permeameter in a permeability test setup involves a soil sample 200 mm diameter and…

Q: For a constant head laboratory permeability test on a fine sand, the following are given: Length of…

Q: A sample of sand is subjected to a constant head permeability test. The sample diameter is 60 mm and…

A: Given data Diameter of sample (D) = 60 mm Length of sample (L) = 130 mm Applied head (h) = 60 cm…

Q: A constant-head permeability test is performed in a laboratory where the soil sample is 25 cm in…

Q: * The permeameter in a perrneability test setup involves a soil sample 200 mm diameter and a length…

Q: sample of sand, 5 cm in diameter and 15 cm long, was prepared at a porosity of 60% in a…

A: given data : diameter (d) = 5cm/2 = 0.25 cm length (l) = 15 cm = 0.75 m porosity = 60% height (h) =…

Concept explainers

Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.

Question

A constant head permeameter, 85 mm in diameter containing fine sand sample 450 mm long, allowed water to flow at a rate of 184
mL/min under steady flow conditions. Given the difference in head between two points 240 mm apart was 375 mm, determine the
coefficient of permeability in mm/s. When the same sample size is tested in a falling head apparatus using a stand-pipe of 32.5 mm
diameter, calculate the time required for the water in the stand-pipe to drop from 1750 mm to 1000 mm above the outflow level.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Laboratory determination of hydraulic conductivity

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.

Similar questions

I will upvote for correct answer
PROBLEM 1: A sample of sand, 5 cm in diameter and 15 cm long, was prepared at a porosity of 60% in a constant-head apparatus. The total head was kept constant at 30 cm and the amount of water collected in 5 seconds was 40 cm?. The test temperature was 20°C. the Calculate coefficient of permeability? a. 0.261 cm/s b. 0.960 cm/s c. 0.204 cm/s d. 0.178 cm/s
PROBLEM 2: During a constant-head permeability test on a sand sample, 260 x 10° mm³ of water were collected in 2 minutes. If the sample had a length of 100 mm, a diameter of 40 mm and a maintained head of 200mm. What is its coefficient of permeability? a. 0.769 mm/s b. 0.967 mm/s c. 1.321 mm/s d. 0.862 mm/s
please answer all parts
I need the answer as soon as possible
The results of a constant-head permeability test for a sand sample having a sectional area of 10000mm2 and a length of 200 mm are as follows: (1) Constant head difference 400mm (2) Time of collection of water = 30 seconds (3) Volume of water collected = 600 cm3. The hydraulic conductivity is: Oa. 1.0 mm/sec Ob. 1,7mm/sec c. 2.9 mm/sec O d. 0.5mm/sec
i need the answer quickly
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
HYDRAULIC CONDUCTIVITY PROBLEM 1: The results of a constant head permeability test for a fine sand and sample having a diameter of 150 mm and a length of 150 mm are as follows: Constant head difference = 40 cm Time of collection of water = 83 sec Weight of water collected = 392 g Find the hydraulic conductivity a. 0.094 cm/sec b. 0.01 cm/sec C. c. 0.005 cm/sec d. 0.86 cm/sec
A sample of sand 5 cm in diameter and 15 cm long, was prepared at a porosity of 60% in a constant-head apparatus. The total head was kept constant at 30 cm and the amount of water collected in 5 seconds was 40 cm3 . The test temperature was 20°C. Calculate the coefficient of permeability (cm/s) and the seepage velocity in cm/s.
A sample of sand is subjected to a constant head permeability test. The sample diameter is 60 mm and its length is 130 mm. Under an applied head of 60 cm, 119 cm³ of water flows through the sample in 5 minutes. Determine (a) the coefficient of permeability, and (b) the discharge velocity.
Name.. Q3 Water flows through the constant head setup in the laboratory, as shown in the figure, where two identical dense sand samples A and B are placed-one horizontally and the other vertically. The samples are 50 mm diameter and 100 mm in length. The water levels in the left and right sides are maintained at the levels shown, ensuring constant head throughout the test. The void ratio of the sand is 0.92 and the specific gravity of the grains is 2.69. If 165 g of water was collected in the bucket within 15 minutes, 1. What is the permeability of the soil? 2. What the pore water pressure and vertical effective stress at the mid height of sample B? OH 2 190 100+100 A = (50) 7 9 = 0.95 1963.5 100 mm crosesection מות 190 Datumn 40 mm 100 min Arey B.