Civil 791 Construction Management 2025
Semester 1
Assignment 2 (25% of total assessment)
1.0 General
1.1 Assignment Type
Individual Assignment
1.2 Submission Date and Time
Monday 26 May 11:59pm
1.3 Submission Method
All work for this assignment is to be compiled into one pdf which shall be submitted to Canvas by the due date.
1.4 Penalties for late submission
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Time after Due Date
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Penalty
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<=24 hrs (1 day)
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-10%
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>24 hours but <= 48 hours (2 days)
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-20%
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>48 hours but <= 72 hours (3 days)
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-30%
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>72 hours but <=96 hours (4 days)
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-40%
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>96 hours but <=168 hours (7 days)
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-50%
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>168 hours (7 days)
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-100%
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2.0 Assignment Outline
2.1 Background Scenario
A building is to be built which requires construction of a basement retaining wall along one side which backs onto an embankment.
The basement retaining wall is 3.5 m high and 90m in total length and is founded on 400mm diameter, 35m deep bored piles.
Bored piles have been selected by the engineer due to their high strength capacity, as well as their ability to be installed with minimal vibration, which is important as the site is located adjacent to a hospital which is sensitive to disturbance. Furthermore, this will minimise disturbance to any other works which are occurring on site at the same time.
The piles are to be installed in stable soil and hence are unsupported, meaning that no casing is required.
Your company had proposed Continuous Flight Auger (CFA) piling instead as CFA piling is considerably faster, however the engineer has insisted on bored piles, as the process of installing CFA piles would not give the engineer an opportunity to confirm the quality of soil during installation.
The soil conditions at the site include slow draining silts and clays with a high but fluctuating ground water table. With stringent requirements regarding waterproofing and the ingress of moisture, monolithic in-situ reinforced concrete construction is proposed together with drainage and Nuralite Preprufe 3000 and Bituthene waterproofing products to the underside of foundations and the wall exterior respectively. The design details are shown in the engineer's sketches (refer Sketches 1 and 2).
It is hoped that the project will commence on the 1 July 2025. It is noted that the Client would like this phase of the work to be completed as soon as possible.
2.2 Assignment Scope
You are working for a construction company specialising in concrete construction and piling and as part of the contract management team, you are tasked with compiling information in a brief report addressing considerations for a tender submission for construction of the basement retaining wall.
Your report should include the following:
Part A 一 Preliminary Project Programme
A programme for the project is to be provided. You will need to determine a sequence which completes the work as efficiently as possible which is to be presented on a Gantt chart. It is recommended that this be produced using MSProject (which is available in the engineering computer labs) or Project Libre which is free for download https://www.projectlibre.com/). A step-by-step guide on how to use MS Project is available under the Lecture 6 materials.
Information to be provided together with the schedule should include:
a) A work breakdown structure.
b) A list of any assumptions and rationale regarding the development of the schedule. This may include justification for durations as well as other considerations or approaches.
c) Commentary on the critical path which should be highlighted on the programme provided.
Considerations:
1. It is recommended that you explain in your report how you determined the
duration of the piling work, taking into account the constraints given in Sketch 2.
2. It is suggested you make use of the recommended software. It may be necessary for you to experiment with different scheduling alternatives. If you feel some of this information is relevant in order to justify your chosen schedule, you might consider including it in an appendix.
3. Gantt charts should show sufficient information to illustrate the proposed schedule. This should include the critical path.
4. Note that you should not calculate the critical path by hand. Instead you should utilise functionalityofthe software. Avisualinspection ofthe taskswhichmake upthe critical path is also recommended.
Part B 一 Cost Estimate
a. Use the bottom-up estimation method to estimate the overall project cost. The cost of
various items should be estimated individually and then aggregated to determine the total project cost. You should include notes regarding
• Any assumptions
• Inclusions and exclusions
b. Reassess your piling cost estimate by using the Rawlinsons 2014 Detailed Trade Rates for Insitu Concrete Piles – Bored.
You must update the 2014 cost to reflect 2025 values using the Cost Fluctuation
Adjustment equation found in NZS3910:2013 Appendix A, along with the appropriate indices from Statistics New Zealand.
Once you have calculated the updated cost for 2025, briefly compare it with your original estimate. You do not need to revise your original calculations—simply note any differences.
Considerations:
1. You should be able to build up a cost estimate with the information given in this Assignment brief alone, however if you wish, you may use additional cost information from other sources.
Part C 一 Weekly Cash Flow
A weekly cashflow during the course of the project should be provided with reference to the the programme and the budget estimate you have provided.
You should provide some commentary on this.
Considerations:
1. If you are utilising MS Project you might consider utilising the Cash Flow reporting function. However, the use of MS project is optional for this task, you are free to generate your cash flow without using this tool.