Reference no: EM133656501

Manage civil works design processes

Task Summary:
In this assessment, you are required to complete 2 project designs as per the project/design scenarios provided. Where applicable, the skills observations must be conducted in the ATCWA Simulated work environment.

Project Design 1:

The Problem:

You are a civil designer working for the state department of transportation.
You have been assigned responsibility for the design of a truss bridge to carry a two-lane highway across the river valley shown below.

Project Objective:

Satisfy all of the specifications listed below, while keeping the total cost of the project as low as possible.

Bridge Configuration:

The bridge may cross the valley at any elevation from the high water level to 24 meters above the high water level.
If the elevation of the bridge is below 24 meters, excavation of the river banks will be required to achieve the correct highway elevation.
To provide clearance for overhead power lines (shown above), the highest point on the bridge may not exceed an elevation 32.5 meters above the high water level (8.5 meters above the top of the river banks).
The bridge may consist of either standard (simple supports) or (arch supports). If necessary, the bridge may also use one intermediate, located near the center of the valley. If necessary, the bridge may also use cable, located 8 meters behind one or both abutments.
Each main truss can have no more than 100 and no more than 200.
The bridge will have a flat, reinforced deck. Two types of concrete are available:

Medium-strength concrete requires a deck thickness of 23 centimeters (0.23 meters).
High-strength concrete requires a deck thickness of 15 centimeters (0.15 meter).

In either case, the deck will be supported by transverse spaced at 4 meter intervals. To accommodate these floor beams, your must has a row of joints spaced 4 meters apart at the level of the deck. These joints are created automatically when you begin a new design.
The bridge deck will be 10 meters wide, such that it can accommodate two lanes of traffic.

Member Properties:

Materials. Each member of the truss will be made of either carbon steel, high-strength low-alloy steel, or quenched and tempered steel.
The members of the truss can be either solid bars or hollow tubes. Both types of cross- sections are square.
Member Size: Both cross-sections are available in a variety of standard sizes.

Loads:

The bridge must be capable of safely carrying the following loads:

Weight of the deck.
Weight of a 5-cm thick, which might be applied at some time in the future.
Weight of the steel floor beams and supplemental bracing members (assumed to be 12.0 applied at each deck-level joint).
Weight of the main trusses.
Either of two possible truck loadings:

Weight of one standard H25 truck loading per lane, including appropriate allowance for the dynamic effects of the moving load. (Since the bridge carries two lanes of traffic, each main truss must safely carry one H25 vehicle, placed anywhere along the length of the deck.)
Weight of a single 480 kN Permit Loading, including appropriate allowance for the dynamic effects of the moving load. (Since the Permit Loading is assumed to be cantered laterally, each main truss must safely carry one-half of the total vehicle weight, placed anywhere along the length of the deck.)

Structural Safety:

The bridge will comply with the structural provisions of the state specified standards, to include:

Material densities
Load combinations
Tensile strength of members
Compressive strength of members

Cost:

The cost of the design will be calculated using the following cost factors:

Material Cost:

Carbon steel bars - $4.50 per kilogram
Carbon steel tubes - $6.30 per kilogram
High-strength steel bars - $5.00 per kilogram
High-strength steel tubes - $7.00 per kilogram

Quenched and tempered steel bars - $5.55 per kilogram
Quenched and tempered steel tubes - $7.75 per kilogram

Connection Cost: $500.00 per joint
Product Cost: $1000.00 per product
Site Cost:

Reinforced concrete deck (medium strength) - $5,150 per 4-meter panel.
Reinforced concrete deck (high strength) - $5,300 per 4-meter panel.
Excavation - $1.00 per cubic meter (See the Site Design Wizard for excavation volume).
Supports (abutments and pier) - Cost varies (See the Site Design Wizard for specific values) $6,000 per anchorage.

The Problem:
Project Design 2:

For completing this project, assume that you have been working a Civil Construction designer for the "SMART" Construction Pvt. Ltd located in Bunbury.
The recent project you have been assigned is to design of a concrete bridge as per the following specifications.
With two lanes over an existing road.
The bridge must be able to carry a maximum load of 100 tons,
It also to be designed to withstand earthquakes with a magnitude of up to 7.0 on the Richter scale
Minimum span for the bridge will be at least 30 m and height from the existing road should be between 25-30 m
It must be aesthetically pleasing and blend in with the surrounding environment.
Project Timeline:
The timeline for this project is 6 months.
Project Budget:
The project budget is $1 million.
Risk assessment:

Prepare a risk assessment matrix to demonstrate the risks you indented and the assessment level of each risk along with the risk mitigation strategies.

Refer to the Risk Assessment Matrix provided below to guide you on completing this task and use the Risk Assessment Template for completing the risk assessment.
Design options:

Propose at least 2 different design options including different mixtures of concrete, reinforcement and pavement designs.
Interpret and analyse data:
Depending upon the specifications and the options you have proposed above, calculate the following.
Loads
Shear forces
Bending moments
Stresses
Areas
Volumes
Mass

This section must be completed based on the both designs you have completed by now. Based on what you experience and have come across;
Explain the following key aspects that were applicable in designing the projects.

Legislation you had to refer and adhere with.
Documentation you had to review, use and complete.
Policies and procedures you followed.
Standards to applied and followed.
Explain how you would review the plans and drawings following the key measures listed below.
Specifications
Design brief
Engineering survey information including geotechnical information
Hydrological and meteorological data
Cultural and heritage data
Statutory compliance
Work health and safety
Environmental management

Civil design techniques including computer aided drafting design (CADD) and drafting technology
Communication Plan:
Preparing the plan:
Prepare a communication plan that demonstrates how you will work and communicate with the stakeholders for completing this project. The communication plan must provide information on how you would;
Comply with reporting requirements and procedures;
Communicate with others to receive and clarify work instructions;
Communicate with others to coordinate work activities;
communicate and collaborate with clients to resolve problems and meet job requirements;
seek advice from required personnel where proposed design includes non- standard engineering requirements or new technology;
monitoring and supporting design processes;
creating a demonstrating model of the design;
confirming documentation requirements are met.

Meeting with the key stakeholders:

Consult your Assessor for further instructions to complete this task.
Meet with the key stakeholders of the projects. Your assessor will play the role of the stakeholder to complete this task.
The time allocated for this meeting is 30 minutes.
You need to have all required documentation including the designs and the communication plan to discuss how you would proceed with finalising the designs.
While playing the role of the stakeholders, your Assessor will observation your meeting and ask questions to clarify further details.
Finalising the designs:
Based on the feedback you receive from the key stakeholders, make necessary adjustments and amendments to the designs and other applicable documentation.