A layer of saturated cohesive soil (16m deep) has a water content of 46 % , and the specific gravity of solid particles of the soil is 2.65. Unit weight of water is 9.81 kN/m³

^Determine

volume of air, weight of water (Ww) in terms of weight of solid, volume of water (Vw) in terms of weight of solid, volume of solid in terms of weight of solid (W_s), weight of water, Assume total volume of soil is 1m³. Determine the weight of solid (W_s) , weight of water in KN and bulk unit weight of soil

In a vertical smooth wall 5m high, the water table is at 2m below the ground surface. Calculate and draw the active lateral pressure using the following data: ydry = 15 ysat = 17. 5 0 = 34 ° above the water table ° 36 = j below the woter table Also, calculate the active thrust (Pa) and its location?

If a spill of radioactive material occurred over an aquifer, estimate the length of time required for the material to reach a river 2 mi away if the aquifer is

a) Gravel

b) Clay

c) Sandstone

d) Granite

Groundwater elevation at the spill site is 100 ft above the water surface in the river.

Using ACI codes.

Design a simply supported one-way reinforcement concrete floor slab with a dimension of 10 ft x10 ft.  

Dead load = 2620 lb

Live load= 28000 lb

Use f'c = 3000 psi and fy = 60,000 psi.
Reinforcement is number 8.

a) Design a one wat slab using ACI code with Reinforcement and the distance of steel bars from one another.

b) Design a slab without reinforcement with minimum thickness.

Compare the load, concrete slab and a reinforced concrete slab can take? What is the advantage of a reinforced concrete slab over a normal concrete slab in this case?

How many and what type of rebars should be places in the reinforcement concrete slab?

1. A traffic signal on the four-leg signalized intersection is designed based on the information below. Please answer the following questions. The startup lost time per phase is 2.0 seconds, and the clearance lost time per phase is 1.5 seconds. The deceleration rate of the vehicles is 3.4 m/s², and the average length of the vehicles is 6.0 m. The lane width of normal lane is 3.3 m, and the turn bay width is 2.8 m. Please ignore the median width and shoulders. Assume there is no sidewalk.

1.1 Compute a displayed yellow signal of all approaches for safe operation of the intersection.

1.2 Compute an all-red signal length of all approaches for safe operation of the intersection. Assume that the number of lanes on leaving direction from the intersection is three for all. Consider the number of lanes on right side of driving direction for this problem.  

1.3 Compute the capacity of through movement of all approaches. A saturation flow rate for through movement is 1800 veh/h. If the multiple cycle lengths are available from calculation, please use the longest cycle length for all approaches to determine the capacity.

2. A flexible pavement is designed with an initial PSI of 4.5 and terminal PSI of 2.0. The subgrade soil was tested and provided CBR value of 6. The relationship between CBR and resilience modulus is given as Mr=1500*CBR. The structural number of this pavement is 4.5 and the overall standard deviation is 0.35, and the reliability is 99%. The original pavement was designed for the following daily traffic:
   • 1400 single axles with 8kips
   • 30 single axles with 40 kips
   • 200 tandem axles with 40 kips

When the axle passes of a single axle with 40 kips and a tandem axle with 40 kips increased by 40% into this highway traffic during the entire service period, how many years will be reduced in the pavement service life?

What is the role of modelling in the design process? Give three reasons why models are useful and illustrate each reason with an example.

Question 3:

Use the annual flood data (annual maximum series) in the table below to perform a flood frequency analysis using the U.S. Water Resources Council Guidelines. The map skew for this location is - 0.2

Fill out the following table

How are Construction Management tools and equipment different from Construction tools and equipment?

In the design of a multiple bay mill-type industrial building with a separate metal processing and finishing shops, what do we use, open or covered structure? Why? Explain in details.

Problem Statement:  An urban circumferential freeway is to be designed on the basis of the following information: design year average annual daily traffic, AADT = 75,000 veh/day; the estimate of the percent of traffic occurring during the peak-hour is 9%; the percent of peak-hour traffic in the heavier direction is estimated to be 55%. The traffic mixture is expected to be similar to the current mixture of 7% trucks, 3% buses and no recreational vehicles. The PHF is estimated to be 0.9. The base free-flow speed is 70 mph. If the freeway is to be built on rolling terrain with no lateral obstructions and 12-ft lanes, determine the number of lanes needed to provide a minimum LOS of B.

1) (3 pts) Describe in 1 to 3 complete sentences:

• What type of problem is this?
• Describe what you are being asked to solve for.
• Draw a diagram of the problem.

2) (3 pts) Describe, in complete sentences, the general method used for solving the type of problem identified in step a.

3) (2 pts) List all know information, translated into the appropriate variables. For example, if the problem specifies, “the initial speed is 70-mph”, you would list this as v_i=70 mph.

4) Solve the problem, explaining each step. You should explain what each step is, why you are using a particular equation, any assumptions you are making. You should split your paper in half vertically and use one side to write the solution and the other side for the explanation. An example of what I’m looking for in a setup is below.

5) (2 pts) In 1 to 2 complete sentences, provide an analysis or justification for your solution. Does the answer seem reasonable? Why or why not? Is it the right order of magnitude? Why or why not?

Explain in one paragraph each how the following changes in the business environment described are likely to impact on the organisation’s human resources requirements;

Your organisation builds roads and bridges. It relies on civil engineers to carry out the work. Having reviewed the external business environment you find that there is a shortage of qualified civil engineers in Australia.