160Chapter 6: Hydraulic Conductivity6.8 The hydraulic conductivity, k of a soil is 0.832 x 10-5 cm/sec at a temper-ature of 20°C. Determine its absolute permeability at 20°C, given that at20°C y = 9.789 kN/m³ and n = 1.005 × 10 3 N-s/m² (Newton-second persquare meter).

Absolute permeability Kˉ=8.542×10−15m2Explanation:

Answered: 160 Chapter 6: Hydraulic Conductivity…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

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Referring to Figure Q3, calculate the following quantities: a. Elevation head, total head, and pressure head at point M on Figure Q3. b. The quantity of water seeping through the dam of Figure Q3 per day. The hydraulic conductivity of the soil is 10-8 Boundary equipotentials Na = 9 N = 3 Boundary flowlines %3D 10 m %3D 12 m 6 m M A (11 m7 m 1 m 2 m Fig. Q3: Earth Dam
The figure shows the layers of soil in the tube that is 10 cm by 10 cm in cross section. When the tube is supplied with water, a constant head difference of 30 cm is observed. The coefficient of permeability of each sample are as follows: A. Find the equivalent coefficient of permeability. B. Determine the hydraulic gradient. C. Compute the rate of water supply.
Don't mind the circle Ps. Not graded
Determine the effective vertical hydraulic conductivity, keff, of the rectangular prismatic composite soil sample that is composed of soil A and soil B. Soil A has a hydraulic conductivity, k4, of 1x10 cm/s, and Soil B has a hydraulic conductivity, kB, of 1x106cm/s. Soil A and Soil B both have exactly the same height, width, and thickness (L=12cm, 11-4cm, 8cm). Assume porous stones are placed at the top and bottom of the composite soil sample so that the flow of water is equally distributed to both soil sides. a L A B W
A constant head test is performed using a permeameter in the laboratory. The graduated cylinder collects 892 cm3 of water in 112 seconds. The soil specimen diameter = 18 cm , th elevation of water in upper-most piezometer is 181 com , the elevation of water in lowest piezometer is 116.6 cm and the piezometer inlets are evenly spaced at 16.7 cm on center. Compute the hydraulic conductivity, k and choose the correct answer below based on that. O A. 2.1 x 10^-3 cm/second O B. 1.5 x 10^-2 cm/second O C. 2.91 x 10^-2 cm/second O D. 2 x 10^-2 cm/second QUESTION 10 Given: -Applied stress on a soil = 122 kPa %3D -Influence Factor = 0.4 Compute the change in stress at 10 m below the edge of 25 m dimeter oil tank and select the correct answer from below: O A. Change in stress = 44 kPa O B. Change in stress = 49 kPa O C. Change in stress = 40 kPa O D. Change in stress = 42 kPa %3D
Water flows through a sand filter as shown on the figure. The soil has a cross sectional area of 0.33 m². d1=d2=d3=0.52 m. Head difference is 0.92 m. Inflow Outflow Soil A Soil B Soil C -d1- -d2- Coefficient of Permeability for Each Soil: Soil A Kax 2.99 x 10-² cm/s Soil A Kaz 1.44 x 10-³ cm/s Soil B Kbx 1.63 x 10-2 cm/s Soil B Kbz 2.22 x 10-³ cm/s Soil C|Kcx|3.15 x 102 cm/s Soil C Kcz 3.17 x 10-3 cm/s Compute the flow of water through the soils in liters/sec. Use 4 decimal places.
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Figure below shows layers of soil in a tube that is 100mm x 100mm incross section. Water is supplied at a constant head difference of 400 mm across thesample. The hydraulic conductivities of the soils in the direction of flow through them areas follows. Soil k (cm/sec) Porosity, n (%) A 1x10-2 25 B 3x10-3 32 C 4.9x10-4 22 a. Calculate the equivalent k in cm/sec.b. Calculate the rate of water supply in cm^3/hrc. Calculate the seepage velocity through soil C in m/sec.
Three soil samples in a permeameter overlie one another with their characteristics listed below. Layer Hydraulic Conductivity, ft/day Length of aquifer, ft 1 10 5 2 0.20 3 0.030 12 a. Determine the equivalent hydraulic conductivity, in ft/day, if the flow is perpendicular to the stratification. b. If a falling head test is used, calculate the time required, in seconds, for the head to drop from 65 to 54 ft. The cross-sectional area of the permeameter and the standpipe are 300 square feet and 30 square feet respectively.

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160 Chapter 6: Hydraulic Conductivity 6.8 The hydraulic conductivity, k of a soil is 0.832 x 10-5 cm/sec at a temper- ature of 20°C. Determine its absolute permeability at 20°C, given that at 20°C y = 9.789 kN/m³ and n = 1.005 × 10 3 N-s/m² (Newton-second per square meter).