A falling-head permeability test was carried out on a clay soil of diameter 10 cm and length 15 cm. In 1 hour the head in the standpipe of diameter 5 mm dropped from 68 cm to 50.2 cm. Calculate the hydraulic conductivity of this clay.

A falling-head permeability test was carried out on a clay soil of diameter 10 cm and length 15 cm. In 1 hour the head in the standpipe of diameter 5 mm dropped from 68 cm to 50.2 cm. Calculate the hydraulic conductivity of this clay.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

See similar textbooks

Related questions

Q: Constant head permeability tests were PENUI height of the two specimens (Ls1: Ls2) is 1.5, the ratio…

Q: From the figure shown, H₁ = 0.60, H₂ = 0.90 m. and h = 0.45 m. The sand has a saturated unit weight…

Q: A falling head permeability test on a specimen of fine sand (Area = 12.5 cm², Length = 10 cm)…

A: Let us first calculate the void ratio from the first test We have γd =γw*G1+e γd = dry unit weight…

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: A double drain consolidation test was performed on a sample of marine clay. The thickness of the…

A: Double drainH = 50 mmk = 1.753x10-8 m/min = 300 KN/m2 = 500 KN/m2 e1 = 0.42e2 = 0.3

Q: meter tube of uniform diameter is filled with three layers of different soils (Figu conductivities…

A: Given:- k1=1 x 10 -5m/sk2=2×10-5m/sK3=0.5×10-5m/sTo find:-pressure head

Q: C1. The sample of soil in a permeability test is 50 mm diameter and 120 mm long. The head difference…

A: Given : Dia. of soil sample = 50 mm Length =120 mm Head difference = 105 mm and flow = 150 ml in 5…

Q: 1.11 A sample of soil 10 cm diameter, 15 cm length was tested in a variable head permeameter. The…

Q: H, H, k, ered soil is shown in the figure above. Estimate the equivalent hydraulic conductivity for…

Q: Constant head permeability tests were performed on two soil specimens, S1 and S2. The ratio of…

A: given-soil specimen length ratios-Ls1Ls2=1.5Ds1Ds2=0.5hs1hs2=2

Q: (ii)A capillary perm. stages under a head at the entry end. In moved from 2 to 8 c it advanced from…

Q: Find the hydraulic conductivity coefficient of permeability, k.

Q: In a constant-head permeability test. A test gives these values: •L= 25 cm •A = 160 area of the…

A: Given that: Length of soil sample, L=25cmArea of the specimen, A=160 cm2Constant head, h=1m=100…

Q: 5. According to the constant-head permeability test, calculate the hydraulic conductivity in cm/sec.…

Q: Q3 A sample of sand, 5 cm in diameter and 15 c m long, was prepared at a porosity of 60% in a…

Q: A constant-head test was conducted on a sample of soil 15 cm long and 60 cm2 in cross-sectional…

Q: A constant=head test was conducted on a sample of soil 15 cm long and 60 cm? in cross-sectional…

A: The given data is: Length of sample (L) = 15 cm Area of the sample (A) = 60 cm2 Quantity of water…

Q: A pumping test was carried out for determining the hydraulic conductivity of soil in place. A well…

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

A: Using Darcy law Q=kia

Q: 1. (30 pts) The soil profile shown below consists of 10 meters of sandy silt overlying gravel. The…

A: Step 1:Step 2: Step 3: Step 4:

Q: Solve Please A sand sample of 25 cm length was subjected to a constant head permeability test in a…

Q: 19. A layered soil is shown in the figure. Given the following: H₁ = 1.5 m k₁= 105 cm/sec H₂ = 2.5 m…

A: Given: H1=1.5m,H2=2.5m, H3=3.0m, K1=10-5 cm/sec, K2=3.0*10-3 cm/sec, K3=3.5*10-5 cm/sec

Q: Permeability of the aquifer is ____ m/s

A: To find depth: Determine the saturated thickness of aquifier before pumping ; h0 = depth of surface…

Q: A bed of uniform sand having particle size 0.6 mm and specific gravity as 2.68 has porosity 0.42.…

Q: A falling head permeability test was run on a soil sample 9.6cm in diameter and 10cm long. The head…

Q: • L =18 in. • A = area of the specimen = 3.5 in.2 • Constant-head difference = h = 28 in. • Water…

Q: In a constant-head permeability test, a 60 cm3 of water was collected in 25 seconds with a head…

A: V=60cm3 t=25sec L=12cm D=8cm

Q: In a constant-head permeability test, a 60 cm3 of water was collected in 25 seconds with a head…

A: Given data, Volume = 60 cm³ Time = 25 second H = 24.3 cm Diameter of sample = 8 cm Length of sample…

Q: constant-head permeability test was conducted on a soil sample retained inside a with a length of…

A: WE KNOWk=qLAhq=VolumeTimeVolume=55cm3time=3hr 15min=195min=195·60 sec

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

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 falling-head permeability test was carried out on a clay soil of diameter 10 cm and length 15 cm. In 1 hour the head
in the standpipe of diameter 5 mm dropped from 68 cm to 50.2 cm. Calculate the hydraulic conductivity of this clay.

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

Step 2

Step 3

Step 4

Trending now

This is a popular solution!

Step by step

Solved in 4 steps

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

In a permeability test conducted on a soil with e = 0.50, the discharge velocity was found to be 2.4 x 10-¹ cm/s. The seepage velocity is:
Given: Permeability, k = 40 x 104 cm/s Saturated unit weight of the soil = 20 kN/m³ Other information shown in the Figure E3-3 Determine the following: (a) Quantity of Discharge (b) Total vertical stress at Points B and D (c) Pore-water pressure at Points B and D (d) Effective vertical stress at points B and D 20.0 m 6.5 m 5.0 m 10.5 m Water YAY Concrete Impervious Figure E3-3 1.0 m VAYAYAY 5.0 m
11.15 For a normally consolidated σ = 2 ton/ft² • σ + A' = 4 ton/ft²2 • e = 0.96 The hydraulic conductivity k of the clay for the preceding loading range is 1.8 x 10 ft/day. • clay, the following are given: • e = e = 1.21 a. How long (in days) will it take for a 9 ft thick clay layer (drained on one side) in the field to reach 60% consolidation? b. What is the settlement at that time (that is, at 60% consolidation)?
A falling head hydraulic conductivity test is performed on a sample of soil. The stand pipe having a diameter of 0.20cm is observed and it takes 60 seconds for the water to drop by 50 cm from an initial hydraulic head of 90cm. The sample has a length of 20cm, and a diameter of 4cm. a.Find the coefficient of permeability (cm/sec) b.Solve for the hydraulic gradient c. Compute the rate of flow of water in the soil. (cm' /sec.) 0.20 cm 6 s TAND PIPE 50cm Acm 不 20am -: SOIL
.-Falling head permeability test, given soil sample: length is 50.8 cm, area=10.17 cm², area of stand pipe=1.3cm2 , head at time zero(to)=76.2cm. head at time 10 min=30.5cm.a) Find hydraulic conductivity of the soil sample. b)what was the head difference at 5 min.
The water table is lowered from a depth of 10 ft to a depth of 20 ft in a deposit of silt. All the silt is saturated even after the water table is lowered. Its water content is 26%. Estimate the increase in the effective pressure at a depth of 34 ft on account of lowering the water table. Assume G, = 2.7. 34 ft 20 ft 10 ft 10 ft Silt deposit Figure Ex. 5.7 Original G.W.L. Final G.W.L.
5. For a constant head laboratory permeability test on a fine-sand, the following values are given: Length of specimen, L = 10 inches Diameter of specimen = 2.5 inches Head difference, h = 22 inches Water collected in 2 min = 0.011in? Void ratio = 0.34. Determine the conductivity, k, of the soil in inches/min and the discharge velocity through the soil in inches/min. Porous stone Soll specimen Porous stone Graduated flask
Water resources H.W No. 4 Q1-Falling head permeability test, given soil sample: length is 50.8 cm, area=10.17 cm?, area of stand pipe=1.3cm? , head at time zero(to)=76.2cm. head at time 10 min=30.5cm.a) Find hydraulic conductivity of the soil sample. b)what was the head difference at 5 min.
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)
Don't mind the circle Ps. Not graded