The intersection angle of a 6° simple horizontal curve is 65°25', and the PC is located at station (238+14). Determine: the length of the curve (L), the station of the PT, the deflection angle for setting out the first point after the PC, and the chord length for setting out the first point after the PC, the deflection angle for setting out the last point before the PT, and the chord length for setting out the last point before the PT. The length of the curve is:

-The station of the PT:

-The deflection angle for setting out the first point after the PC is:

-The chord length for setting out the first point after the PC is:

-The deflection angle for setting out the last point before the PT is:

-The chord length for setting out the last point before the PT is:

A four-lane undivided multilane highway (two lanes in each direction) has 3.4 m lanes and 1.5 m shoulders. At one point along the highway there is a 4% upgrade that is 1 km long. There are 15 access points along this grade. The peak-hour traffic volume has 2500 passenger cars and 200 trucks and buses (no recreational vehicles), and 720 of these vehicles arrive in the most congested 15-min period. This traffic stream is primarily commuters. The measured free-flow speed is 90 km/h. To improve the level of service, the local transportation agency is considering reducing the number of access points by blocking some driveways and rerouting their traffic. How many of the 15 access points must be blocked to achieve LOS C?

The number of access points that must be blocked is:

A divided multilane highway in a recreational area (fp=0.90) has four lanes (two lanes in each direction) and is on a rolling terrain. The highway has 3 m lanes with a 1.8 m right-side shoulder and a 0.9 m left-side shoulder. The posted speed limit is 80 km/h. Formerly there were 3 access points per km, but recent development has increased the number of access points to 9 access points per km. Before development, the peak-hour factor was 0.90 and the directional hourly volume was 2400 vehicles with 8% large trucks and buses and 5% recreational vehicles. After the development, the peak-hour directional flow is 2800 vehicles with the same vehicle percentages and PHF. What is the level of service before and after the development?

-For the before condition, the free-flow speed is:

-For the before condition, the analysis flow rate is:

-For the before condition, the LOS is:

-For the after condition, the free-flow speed is:

-for the after condition, the analysis flow rate is:

-For the after condition, the LOS is:

Is there a difference between a backfill that is fully saturated and one that is completely covered with the ground water table, is there pore pressure in a fully saturated soil

Can i have a poster of natural disaster ( 330-500 words)? Include referecences

Criteria are as follow

Apply concepts and language related to disasters to a concrete example. 2. Identify the role of disaster policy by using the relevant literature 3. Identify the relevant case study and address policy background and issues Natural Hazards and Disasters 4. Identify policy response pathways to the chosen disaster and key factors that modulated the contrasting scenarios (ie., social, economic, environmental factors etc.) 5. Identify remaining policy issues and challenges by reflecting the role of disaster policy.

Question 5

On a construction site a lot of labor/skill is needed as one start the project but as you scale down on the

works, there is a tendency to reduce on the workforce,

a. Discuss how you factor the downsizing of the workforce when preparing the bill of quantities?

.

b. Discuss the importance of quantity surveying to Civil Engineering?

c. With clear labeled diagram, how do you carry out quantity take off for road, dam and water

project respectively?

A simply supported beam has a width of 200mm and depth of 400mm is 4m long. It carries a uniformly distributed load of 20 kN/m over the whole beam and a point load of 40 kN at the center of the beam. Compute the maximum deflection if the maximum slope produced in the beam is 2× ??-3 radian.   

A group of concrete piles (3×3) is driven into a uniform layer of medium dense sand, which has a unit weight of g_t = A kN/m³and a friction angle of f = B^o. The water table is C m below the ground level. Each pile has a diameter of 400mm, a length of 10m. The centre-to-centre spacing of the piles is s = D m.

Assume proper values for A, B, C and D.

1. Calculate the ultimate vertical capacity of a single pile.
2. Find the allowable load capacity of the pile group, based on individual pile failure. Use a factor of safety of 2.5 and a pile group efficiency of 0.9.
3. Based on Hansen’s equations, find the allowable block capacity of the pile group. Use a factor of safety of 3.5. Assume the average unit weight of concrete piles is 25 kN/m³.

2.A simply supported beam has a width of 200mm and depth of 400mm is 4m long. It carries a
uniformly distributed load of 20 kN/m over the whole beam and a point load of 40 kN at the
center of the beam. Compute the maximum deflection if the maximum slope produced in the
beam is 2× ??-3 radian.

The majority of new railways are being built for use with electric traction, with many existing railways also being electrified. Summarise:

(i) The benefits of an electrified railway when compared with conventional (diesel) motive power

(ii) The advantages and disadvantages of the two different types of electrification system

(iii) The practical applications of each type of system. Give reasons for your answer.

(b) Describe some common ways of stabilising failed soil slopes. Explain your answer using sketch drawings where appropriate.

(c) Detail and discuss three aspects of water management and control within railway geotechnics and the implications of mismanagement.

Review the methods available for circular slip slope stability analysis in terms of both total and effective stress and explain the circumstances in which each method would be used.

State what the following terms mean and describe briefly how they improve safety in railway signalling:

(i) Block

(ii) Distant Signal

(iii) Overlap

(iv) Track Circuit

(v) Axle Counter

There are several methods for mounting a rail to form a track for the railway engineer. For the following methods, state the advantages and disadvantages and describe where they would most likely be used:

(i) Timber sleeper

(ii) Steel sleeper

(iii) Mono-bloc concrete sleeper

(iv) Twin-bloc concrete sleeper

(v) Slab track

a) During the manufacturing process of rail steel, chemicals may be naturally found in or added to the steel.

For each of the following chemicals, describe where it comes from in the manufacturing process and the effect that it has on the rail steel:

(i) carbon

(ii) silicon;

(iii) sulphur;

(iv) manganese;

(v) hydrogen

(vi) boron and molybdenum