ELEMENTARY SURVEYING LL W/MASTERING ENGR
15th Edition
ISBN: 9780134777481
Author: GHILANI
Publisher: PEARSON
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Chapter 21, Problem 21.18P
To determine
The purpose of retracement surveys.
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The dam presented below is 180 m long (in the direction perpendicular to the plane of the
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a) Construct the flow net (minimum number of equipotential lines should be 10),
b) Calculate the rate of seepage for the entire dam,
c) Find the total uplift force on the dam (ignore barriers), and
d) Estimate the hydraulic gradient at points A, B, and D.
Recommended to use a spreadsheet to include all equations for calculations of potentials.
Using A36 steel select the lightest equal leg single angle member to resist a factored (LRFD) tensile load Pu = 167 kips. The member will be connected through one leg with one line of three 3/4-in Ø bolts spaced at 3 in between centers as shown. The edge distances Leh = Lev = 1.5 in. Use LRFD Method Use U from Table D3.1, Case 8. See attached (D3.1 Case 8, Shear Strength of Bolts, Table 1-7 Dimensions of Angles).
The system in Fig. consists of 1200 m of 5 cm cast-iron pipe e=0.26mm, two 45° and four
90° elbows, a globe valve, and a sharp exit into a reservoir. If the elevation at point 1 is 400 m,
what gage pressure is required at point 1 to deliver 0.005 m3/s of water into the reservoir? U=
10-6m²
1 *
sec
-, K 45° elbows= 0.2, K 90° flanged = 0.2, K globe valve 10, K Sharp exit=1
G
Elevation
500 m
45°
Open
globe
45°
Sharp
exit
Chapter 21 Solutions
ELEMENTARY SURVEYING LL W/MASTERING ENGR
Ch. 21 - Prob. 21.1PCh. 21 - Prob. 21.2PCh. 21 - Prob. 21.4PCh. 21 - Prob. 21.6PCh. 21 - Prob. 21.7PCh. 21 - Prob. 21.8PCh. 21 - Prob. 21.9PCh. 21 - Prob. 21.10PCh. 21 - Prob. 21.11PCh. 21 - Prob. 21.12P
Ch. 21 - Prob. 21.13PCh. 21 - Prob. 21.14PCh. 21 - Prob. 21.15PCh. 21 - Prob. 21.16PCh. 21 - Prob. 21.17PCh. 21 - Prob. 21.18PCh. 21 - Prob. 21.19PCh. 21 - Prob. 21.20PCh. 21 - Prob. 21.21PCh. 21 - Prob. 21.22PCh. 21 - Prob. 21.23PCh. 21 - Prob. 21.24PCh. 21 - Prob. 21.26PCh. 21 - Prob. 21.28PCh. 21 - Prob. 21.29PCh. 21 - Prob. 21.30PCh. 21 - Prob. 21.31PCh. 21 - Prob. 21.32P
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