Combine the following aggregates in the right proportions to produce a blend with the given target gradation.
Sieve size (mm) |
CA7 % Passing |
Washed Sand % Passing |
Dry Sand & Passing |
% Passing Target |
19.00 |
100 |
100 |
100 |
100.0 |
12.50 |
98.8 |
100 |
100 |
100.0 |
9.50 |
62.1 |
100 |
100 |
93.0 |
4.75 |
2.1 |
98.1 |
100 |
62.0 |
2.36 |
0 |
81 |
99 |
45.0 |
1.18 |
0 |
69.9 |
80.7 |
35.0 |
0.60 |
0 |
50.6 |
59.9 |
25.0 |
0.30 |
0 |
20.7 |
40 |
15.0 |
0.150 |
0 |
5.1 |
24.2 |
9.0 |
0.075 |
0 |
1.9 |
17.2 |
4.0 |
In: Civil Engineering
A capped pile group consisting a rectangular grid of 7 by 3 spanning a total length of, 7.1 m in length. Piles are of size 400 mm diameter and spaced at 1.8 m interval. The soil profile at the site consists of 2.5 m of sand followed by clay soil below. Drive Method construction method would be used. Field and laboratory data on the soil profile indicates top layer shear strength of N = 25. Average and strength for bottom layer are Cu = 265 kPa and Cu = 290 kPa. Adhesion factor between soil and pile is 0.9. Would you recommend using the piles as a group or singles?
Part A: Show your working for the following
Pile Group Design
Part B: Show your working for the following
Single Pile Design
In: Civil Engineering
In: Civil Engineering
A new waste treatment plant has been planned to replace an existing small aging plant for your home town. Discuss the MOEs for (i)the overall system, (ii)each phase of the overall system development,and (iii)the operations phase of any of the plant’s processes.
In: Civil Engineering
In: Civil Engineering
In: Civil Engineering
QUESTION 18
What kind of curve is used in stream gauging to relate water surface to discharge?
flood frequency curve |
||
rating curve |
||
depth-duration-frequency curve |
||
intensity-duration-frequency curve |
QUESTION 19
What kind of curve results from the statistical analysis of annual peak discharge date from a stream gauge?
flood frequency curve |
||
rating curve |
||
depth-duration-frequency curve |
||
intensity-duration-frequency curve |
QUESTION 20
What might the HEC-SSP computer program be used for?
Evaluating USGS Regional Regression Equations easily. |
||
Performing statistical analysis of stream gauge data. |
||
Estimating discharge by the Rational Method. |
||
None of the above. |
In: Civil Engineering
Select the lightest W-section for bending,
Cb=1
MD = 60 k-ft
ML = 40 k-ft
Fy= 50 ksi
Lb=10ft
In: Civil Engineering
Q6: A
cantilever beam having span ‘L’ m was subjected to a uniformly
distributed load of
magnitude 8 kN/m for a distance of ‘0.6 L’ from the free end and
two concentrated loads one of
magnitude 15 kN at a distance ‘0.25 L’ m from the free end while
the other of magnitude ‘22’ kN at
a distance ‘0.6 L’ m from the free end respectively. It was
observed that the maximum bending
moment acting on the beam is equal to (-369 kNm). Suggest a
suitable span for the beam based on
the loading condition. How it will change the reaction at the fixed
support? What happens to the
shear force and bending moment values at the fixed support, free
end and at the center of the
beam? By plotting bending moment and shear force diagram for the
beam briefly conclude the
relationship between the values for shear force and bending
moment
In: Civil Engineering
Analyze a response to an mishap or incident that involved critical infrastructure and discuss the coordination & cooperation between local/state/federal/ territorial/or tribal (as applicable)
In: Civil Engineering
Discuss and explain three negotiation techniques used in civil works design process, three client feedback techniques used in civil works design process?
In: Civil Engineering
In: Civil Engineering
a simply supported beam with a uniform distrivuted load of W compute its deflection at midspan and L/4. Draw the deformed structure.
use L=8meters
W=8
In: Civil Engineering
Justify the reasons for saving the materials during
the construction of vertical curves in highway ,with the
component elements of vertical curves . Also Give the necsssity of
providing the component parts of vertical
curve
In: Civil Engineering
Consider a typical settling tank of 10 m diameter and 10 m height. Inlet pipe is approximately 2 m deep from the top of the tank. Perform following preliminary calculations. a. For a water-sand flowrate of 1500 m 3 /hr with 1000 ppm of sand, calculate sand particle size than can be settled in the tank. (Water: density = 1000 kg/m3 , viscosity = 1 cP; Sand: density = 2500 kg/m3 ) (6-marks) b. Consider settling of different sizes (50, 100, 200, 300 µm), calculate required tank size for settling of each particle size at a constant inlet flow rate of 1500 m3 /hr. (4-marks) c. Now consider settling of 50 µm size particles in the tank with diameter of 10 m and height of 10 m, calculate inlet flow rate required, (2-marks) d. For fine particles ( 50 µm), if tank size required to operate at 1500 m3 /hr is very large, suggest design modification to settle the fine particles. (4-marks)
In: Civil Engineering