Ground surfaceGround water table(free surface)Direction ofseepageImpervious layer A permeable soil is underlain by a impervious layer, as shown in figure below. For the permeableстlayer, k = 0.0048sec'Н 3D 3 тапd a 3D5°.a.) Calculate the hydraulic gradient.b.) Calculate for the flow of water per meter width in m3/hr.c.) Calculate the total amount of water percolated per day per meter width in m3.

Answered: A permeable soil is underlain by a…

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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For the soil profile shown in fig. top layer is sand. Initially the water table is 5m below ground level, which is lowered permanently to a depth of 15 m below ground level by pumping over few years. Assuming Yw = 10 kN/m³, unit wt. of sand above wt is equal to 18 kN/m³, unit wt. of sand sand clay below water table equals to 20 kN/m³. Coefficient of volume of compressibility is 0.25 m²/mN. 15 m 5 m 5 m XXXX ! hC Original GWT Lowered GWT Clay
Calculate the equivalent hydraulic conductivity for the following soil sample: 1.5 ft Water O: K-2x10* ft/sec O: K=3x10* ft/sec O: K-4x10 ft/sec : K-5x10 ft/sec Water (2) 4 layers@ 0.5 ft thick each 10 ft O 0.00035 ft/sec O 0.00031 ft/sec O 0.00003
A bed of uniform sand, having particle size 0.45 mm diameter and specific gravity 2.65, porosity 0.42 and depth of the bed 0.67 m is to be washed hydraulically. Compute (a) Backwash rate so that expansion will be 50%. (b) Head loss at this rate. Take: Density of water = 998.2 kg/m³. Dynamic viscosity of water(u) = 1.002 × 10-³ kg/m-s CD 18.5 0.6 Re0.
Given: r1 = 30 m h = 13.6 m r2 = 10 m h1 = 17.6 m H = 20 m h2 = 16.3 m t = 15 m d = 0.6 m ø Q = 13 L/s a.)Find the permeability of the aquifer in m/s. b.)Compute for the transmissivity of the impermeable layer in m2/s.
The soil layers below have a cross section of 100 mm x 100 mm each. The permeability of each soil is: k₁ =10² cm/sec.; kB =3 x 10³ cm/sec; kc = 4.9 x 104 cm/sec. Find the rate of water supply in cm³/hr. A H-150 mm ha B H 150 mm hB C H 150 mm Ah=300 mm
A soil sample is placed in a 1m long and 10cm diameter tube. A constant supply of water is allowed to flow from inlet to outlet. The total water head at the inlet is 2m and the total water head at the outlet is 1m. The hydraulic conductivity is 0.001 cm/s. Which of the following answer is correct? O a. The flow velocity is 0.001 cm/s Ob. The flow velocity is 25 cm/s c. The hydraulic gradient in the tube is 2 Od. The hydraulic gradient in the tube is 0.001
Soil Mechanics
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?
USE FOUR DECIMAL PLACES
a. For Figure 2 below, calculate the effective hydraulic conductivity for flow parallel and perpendicular to layering. Show your work. Explain the difference in values. Figure 2 sand layer; K = 1 m/d; thickness = 5 d 10.5 m clay layer; K = 0.000001 m/d; thickness = 0.5 m sand laver: K = 1 m/d; thickness = 5 m b. Figure 3 below shows the effects of groundwater refraction, assuming that groundwater flow in the top layer is almost horizontal i.e., a = 89.8°, what is B and what can you say about the flow in the clay layer? a a K, b B K Figure 3.

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