soil mechanics questions

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I need you to answer these 3 soil mechanics questions

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CE 343 Soil Mechanics Homework No. 6 (Due on Tuesday, Mar. 12) 1. You are a staff geotechnical engineer for a local geotechnical engineering firm. You are asked to identify a suitable soil to cap a sanitary landfill. This soil must have a hydraulic conductivity no greater than 1×10-8 cm/s. A soil sample from a potential borrow site has been tested in a falling head permeameter similar to the one in Figure 7.7 in textbook (also shown below). This sample was 120 mm in diameter and 32 mm tall. The standpipe had an inside diameter of 8.0 mm. Initially, the water in the standpipe was h1=503 mm above the water in the water bath surrounding the sample. Then, 8 hours 12 min later the water was h2=322 mm above the water in the water bath. Compute the hydraulic conductivity, k and determine if this soil meets the specification. 2. Water seeps through the soil housed in the test setup shown below. The two water levels shown remains unchanged. (a) Determine the pressure head, elevation head, total head, and head loss at points A, B, and C; (b) Determine the flow velocity in the soil for a hydraulic conductivity of 0.013 cm/s. Datum B C A 3. An unlined irrigation canal is aligned parallel to a river, as shown below. This cross-section continues for 4.25 miles. The soils are generally clays, but a 6-inch thick sand seam is present as shown. This sand has a hydraulic conductivity, k = 9×10-2 cm/s. Compute the water loss from the canal to the river due to seepage through this sand layer and express your answer in acre-ft per month (note: one acre-foot is the amount of water that would cover one acre of ground to a depth of one foot, and thus equals 43,560 ft3).
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Running head: HOMEWORK 6

1

Homework 6
Student Name
CE 343 Soil Mechanics
Department
Institution
March 14, 2019

HOMEWORK 5

2

Problem 1
Given,



The Falling Head Permeability as shown in the figure above.



The Hydraulic Conductivity of the soil should be less than 1x10-8 cm/s



Diameter of the sample, D = 120 mm = 12 cm



Le...


Anonymous
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