
Structural Analysis
6th Edition
ISBN: 9781337630931
Author: KASSIMALI, Aslam.
Publisher: Cengage,
expand_more
expand_more
format_list_bulleted
Concept explainers
Question

Transcribed Image Text:Problem 1
You are designing a storm drain for a new parking lot. The topographic conditions at the site restrict the pipe slope to
be approximately 0.013 (with up to 10 percent variation allowed). The storm drain needs to convey a design flowrate
of 17 cfs. You are considering use of concrete pipe (n = 0.013) and corrugated steel pipe (n = 0.022).
(a) Which size pipe and what slope would you specify in each case? Make your selection so the pipe is full, or
nearly full, at the design flowrate. Available pipe diameters are those listed next to tic marks on the "circular
channel - low Q cleaned up" that is posted at NYU Brightspace. Use this nomograph, NOT the one that
is in the Powerpoint lesson because it has more resolution at lower flowrates.
(b) What is the maximum flowrate (when full) that each of the pipes you specified in (a) can convey?
(c) What is the velocity of the water when flowing full in each case?

Transcribed Image Text:Ratio of depth/diameter
1.0
0.9
0.8
0.7
0.6
"
0.5
0.4
0.3
0.2
0.1
0
1
1
+
0.1
Manning's
n
0.2
0.3
Constant m
T
I
In varies with
depth
Discharge
0.4
0.5
0.6
V
VI
0.8
or
0.7
a
Q₁UR
Figure 10.11 Hydraulic elements of a circular section (ASCE. 1982).
0.9
Velocity
V
1.0
1.1
1.2
1.3
90
80
70
60
-50
-40
30
20
1
0.9
-0.8
0.7
Capacity or Discharge, cfs
90
84
-72
-66
60
-54
48
42
36
30
27
-24
21 S
18
Diameter of Conduit. in
15 8
10
0.0002
0.0003
0.0004
0.0005
0.0006
0.0007
0.0008
0.0009
0,001
0.002
0.003-
0.004
0.005
0.006-
0.007
0.008
0.009
0.01
0.02-
0.03-
blablablabate latels
0.04
0.05
0.06-
0.07
0.08
0.09
0.1
0.2-
0.3
0.4-
0.5
0.6-
0.7-3
0.8-
0.9
10-
Slope
5
יייייייייייי
10-
15
20
2.0
FIG. 6-1. Nomograph based on Manning's formula for cir-
cular pipes flowing full in which n = 0.013.
Velocity, fps
Expert Solution

This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 5 steps with 6 images

Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Similar questions
- Subject water system designarrow_forwardWhat is the flowing-full capacity and velocity for a 500-mm-diameter sewer (n =0.013) on a slope of 0.0042 m/m? Determine the actual flow and velocity for a depth of flow equalto 300 mm.arrow_forward4. A section of water line includes 300 m of 150 mm diameter pipe with a roughness coefficient (Ch) of 130 and 600 m of 200 mm diameter pipe with a roughness coefficient of 110. The pipe also includes 2 45° elbows and a swing-type check valve. What is the equivalent length in terms of the 200 mm diameter pipe with a roughness of Ch = 110?arrow_forward
- Problem 1 You are to design a 800’ long sewer pipe that is to be placed in a trench. Prepare an Excel table showing the design elevations every 100 feet. Use stationing of 0+00 for the beginning, and 8+00 for the end. Place the pipe at a gravity drainage slope of -2.5% towards station 8+00. The invert elevation of the pipe at 0+00 is 6375.00’. The pipe has an outside diameter of 1’ and a wall thickness of 1”. Your design needs to include the following:a) List the elevations for the top of the pipe for the plus stations (0+00, 1+00, 2+00, 3+00, 4+00, 5+00, 6+00, 7+00, and 8+00) *.b) Calculate the invert elevation for the pipe at station 8+00 *Note: Elevations for the top of the pipe are used to place leveling rods at those stations and control the depth of the pipe during construction (since the bottom of the pipe is then inaccessible).Hint1: Make a sketch.Hint2: A 3% gravity slope means -3’ per 100’ (as in “three per cent”). “3%” is not an angle.Hint3: For short distances (i.e., pipe…arrow_forwardUsing the Manning nomograph and assuming n=0.013, determine the following: (a) An 800 mm diameter sanitary sewer is built on a slope of 0.2 percent. What is the fullflow discharge capacity of the sewer and what is the flow velocity? (b) What diameter pipe is needed to carry a peak flow of 200 liters/s on a grade of 0.007 ? (c) A 300 mm diameter sewer is built at a grade of 2 percent. What is the depth of sewage flowing in the pipe when it carries a flow of 50 liters/s? What is the velocity? USE MANNING MONOGRAPH, NOT HAZEN WILLIAMSarrow_forwardA 2-m diameter corrugate metal storm sewer is required to carry 4.0 m3/s of water when flowinghalf-full. What is the required slope of the sewer? Ans= .132 Please Show Work.arrow_forward
- A rectangular timber flume 11 ft. wide by 7 ft. deep discharges 391 cfs and n = 0.042 If the same material had been used for a trapezoidal section having the same perimeter, what would have been the greatest discharge in cfs possible with the same hydraulic slope = 0.0006? Round your answer to 2 decimal places.arrow_forwardI need the answer as soon as possiblearrow_forwardDiscuss the factors influencing the optimal pipe diameter selection in pressurized flow design?arrow_forward
- Kindly help this is geotechnical homeworkarrow_forwardWater flows in a rectangular flume 15 ft wide made of brick with cement mortar (n = 0.015). Find the depth of the water under uniform flow at 18 fps with a slope of 0.02. What would be the resulting error in the estimated depth if the “wide-and-shallow” flow assumption were used?arrow_forwardFigure out how long your sewer line can be before gravity feeding is not possible 1/8" per ft (1%). Starting invert = 2.5 ft BFF. City main invert = 6 ft %3Darrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Structural Analysis (10th Edition)Civil EngineeringISBN:9780134610672Author:Russell C. HibbelerPublisher:PEARSONPrinciples of Foundation Engineering (MindTap Cou...Civil EngineeringISBN:9781337705028Author:Braja M. Das, Nagaratnam SivakuganPublisher:Cengage Learning
- Fundamentals of Structural AnalysisCivil EngineeringISBN:9780073398006Author:Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel LanningPublisher:McGraw-Hill EducationTraffic and Highway EngineeringCivil EngineeringISBN:9781305156241Author:Garber, Nicholas J.Publisher:Cengage Learning


Structural Analysis (10th Edition)
Civil Engineering
ISBN:9780134610672
Author:Russell C. Hibbeler
Publisher:PEARSON

Principles of Foundation Engineering (MindTap Cou...
Civil Engineering
ISBN:9781337705028
Author:Braja M. Das, Nagaratnam Sivakugan
Publisher:Cengage Learning

Fundamentals of Structural Analysis
Civil Engineering
ISBN:9780073398006
Author:Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:McGraw-Hill Education


Traffic and Highway Engineering
Civil Engineering
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Cengage Learning