A 0.7m long soil specimen is subject to a steady-state flow, as shown in Figure Q4. The saturated unit weight of the soil is 20 kN/m³. Determine the following: Water 0.3 m 0.8 m A 0.3 m Datum 0.4 m Y Figure Q4 a) Total head (m) at point A, B and C. b) Elevation head (m) at point A, B and C. c) Porewater pressure head (m) at point A, B and C.

A 0.7m long soil specimen is subject to a steady-state flow, as shown in Figure Q4. The saturated unit weight of the soil is 20 kN/m³. Determine the following: Water 0.3 m 0.8 m A 0.3 m Datum 0.4 m Y Figure Q4 a) Total head (m) at point A, B and C. b) Elevation head (m) at point A, B and C. c) Porewater pressure head (m) at point A, B and C.

Fundamentals of Geotechnical Engineering (MindTap Course List)

5th Edition

ISBN:9781305635180

Author:Braja M. Das, Nagaratnam Sivakugan

Publisher:Braja M. Das, Nagaratnam Sivakugan

Chapter8: Stresses In A Soil Mass

Section: Chapter Questions

Problem 8.14P

See similar textbooks

Similar questions

Refer to Figure 7.24. The following data were collected during the field permeability measurement of a confined aquifer using a pumping test. Determine the hydraulic conductivity of the permeable layer. Use Eq. (7.49). Thickness of the aquifer, H = 4.5 m Piezometric level and radial distance of the first observation well: h1 = 2.9 m; r1 = 17.8 m Piezometric level and radial distance of the second observation well: h2 = 1.8 m; r2 = 8.1 m Rate of discharge from pumping, q = 0.5 m3/min
Refer to the figure. If H1 = 1.94 m, H2 = 2.37 m, h = 1.c m, e =0.49, Gs = 2.67,area of the tank = 0.64 m2, and hydraulic conductivity of the sand (k) = 0.3d cm/sec. What is the upward seepage force per unit volume of soil?
A soil profile consists of a clay layer of 10 m thick between a permeable sand layer above and an impermeable rock layer below, the water table being in the sand layer. Before the construction of a reservoir raft foundation, piezometers were installed in the clay layer.The whole process of filling the reservoir may be approximated to applying rapidly a single pressure increment of 100 kN/m2 uniformly throughout the clay layer. One year after filling the reservoir, the settlement was 20 cm and the piezometers indicated the distribution of excess pore pressure as shown in the figure below. Estimate the final settlement and the time to complete 90 % of primary consolidation.
In a pressuremeter test in a soft saturated clay, the measuringcell volume Vo = 535 cm3, po =42.4 kN/m2,pf =326.5 kN/m2, vo =46 cm3, and vf = 180 cm3.Assuming Poisson’s ratio smsd to be 0.5 and using Figure3.31(attached), calculate the pressuremeter modulus (Ep).
The following data are for a falling-head permeability test:• Length of the soil sample = 150 mm• Area of soil sample = 1964 mm^2• Area of the standpipe = 25 mm^2• At time t = 0, head difference = 400 mm• At time t = 8 min, head difference = 200 mma. Determine the hydraulic conductivity of the soil (cm/sec). (ans. 2.75x10^-4 cm/s)b. What was the head difference at t = 6 min? (ans. 23.82cm)
For a falling head laboratory test, the following are the given values:• Length of soil specimen = 210.00 mm• Initial head = 523.00 mm• Final head = 297.00 mm• Duration of test = 3.50 mins• Area of standpipe = 42.0 sq.mm• Area of specimen = 1050.00 sq.mmA. Compute for the hydraulic conductivity of the soil in cm/sec.B. Determine the seepage velocity if n=0.35C. Determine the head difference at t = 120 sec
For a falling or variable head permeability test, the following are given: Length of soil specimen = 12 cm. Cross sectional area of stand pipe: A = 0.018 cm2 Diameter of soil specimen = 7.5 cm. Time of collection of water: t = 65 sec. Head difference at time t = 0; h1 = 70 cm. Head difference at time t = 65 sec; h2 = 40 cm. Temperature of water: 14 ֯C Find the absolute permeability of the soil at 20 ֯C.
GIVEN THE FOLLOWING FOR A FULLY SATURATED SOIL: n=0.28 and Gs = 2.5 FIND THE WATER CONTENT. USE yw = 9.81 KN/(m^3). Use soil Mechanics
From the figure shown, H1 = 0.60, H2 = 0.90 m. and h = 0.45 m. The sad has a saturated unit weight of 18.65 kN/m3 . Hydraulic conductivity of sand K = 0.12 cm/sec. If the cross sectional area of tank = 0.46 m2 , determine the following: 1. Total stress and Effective stress at C. 2. Pore water pressure at C. 3. Rate of upward seepage of water in liters/sec.
A soil sample 10 cm in diameter is placed in a tube 1.2 m long. A constant supply of water is allowed to flow into one end of the soil at A and the outflow at B is collected by a beaker. The average amount of water collected is 2 cm3 for every 10 seconds. Determine the hydraulic gradient. Ans: 0.667
A soil sample 15 cm in diameter is placed In a tube 2 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 2 cubic centimeter every 5 seconds. The tube is inclined and has a head differenceof 2.5 m. Determine the following 1. Hydraulic Gradiant. 2. Flowrate in cm/s. 3. Discharge Velocity in cm/s. 4. Seepage velocity in cm/s if porosity is 0.420. 5. Hydraulic Conductivity.
From the figure shown 1. What is the equation in determining the equivalent coefficient of permeability in the horizontal direction. 2. What is the equivalent coefficient of permeability in the horizontal direction if each soil layer is 3 m. thick and has the given values of K1, K2, K3 and K4. 3. What is the total flow if iav = 0.70