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

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.