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MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, SI Edition, 9th Edition, [Instant Access], 1 term (6 months)
9th Edition
ISBN: 9781305971226
Author: Braja M. Das; Khaled Sobhan
Publisher: Cengage Learning US
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Chapter 9, Problem 9.15P
To determine
Find the factor of safety against heave on the downstream side of the single-row pile sheet structure.
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The dam presented below is 180 m long (in the direction perpendicular to the plane of the
cross-section). For the water elevations given on the drawing:
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 9 Solutions
MindTap Engineering for Das/Sobhan's Principles of Geotechnical Engineering, SI Edition, 9th Edition, [Instant Access], 1 term (6 months)
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- 17-24. Design a water distribution system for the Village of Waffle (Figure P-17-24). The specific de- sign requirements of the client are as follows: 128 m Figure P-17-24 Village of Waffle. -120 m 120 m Open in new tab 00 N ☐ Pancake Road D Apartments ☐ DD. D ☐ 128 m Coffee Creek DODQ00000 Eggs Road State Road 00000 ㅁㅁㅁㅁㅁㅁ Syrup River _128 m 136 m 120 m ㅁㅁㅁ Syrup River 112 m 104 m 100-Year flood -112 m 120 m- 128 m Water tower Grd El 137 m 100 m Share a. Fire protection to be provided by the water distribution system. b. Minimum water pressure at top of apartment building is to be 240 kPa. c. Maximum system pressure is to be 550 kPa. The following assumptions may be used in the design: a. Each of the four apartment buildings is occupied by 50 residents. Each apartment building is four stories high. Each story is 3 m high. b. Each house is occupied by three residents. c. Average daily demand for the village is 500 Lpcd. d. Peaking factor is 6.2 for peak hour demand. e. Needed fire flow…arrow_forwardTwo group of students are collecting traffic data at the two sections A and B 200 meters apartalong a highway. Group A shows that 5 vehicles pass those sections at interval of 8, 9, 10, 11and 13 sections respectively. If the speeds of the vehicles were 80, 72, 64, 56 and 48 kmph.Compute : (i) the time mean speed (ii) space mean speed, and (b)what will be the averagedensity of the above traffic streamarrow_forwardA person entering public transport center to purchase intercity Bus ticket. There is two ticket line to purchase tickets. Each ticket purchase takes an average of 12 seconds. The average arrival rate is 3 persons/minute. Find (a) Probability of having one traveler in the system, (b) the average length of queue, (c)average waiting time in queue, (d) average time spend in system. Arrival follows Poisson distribution and service time follows negative exponential distribution.arrow_forward
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