The major focus of this major assignment is on civil earthworks and the footings required for the proposed structure that your group has selected.
1.Most importantly in this major assignment, you are to focus on Work Health Safety (WHS) issues that could be encountered on this proposed construction site. More details will be covered during the lecture..
2.Your group will further detail the specific machinery you envisage will be used to undertake the earthworks for your structure. You are not designing the structure, or the building proposed, rather you are an earthworks contractor, carrying out the major earthworks, that is required to build the proposed project. These machines could range from major earthwork machinery through to hand held devices, required for detailed earthworks.
3.These first two areas (1) & (2) above, must be covered in your Major Report. These are the only mandatory areas to be included in your report.
4.Your groups Major Report, will detail in addition to the above two items, how the Civil earthworks could be carried out. You are to describe how the excavation could be done and determine an estimation of the earthworks quantities and possible costs involved. This is similar to what you have already done in Building 2, and will be doing in Estimating 1 next semester.
5.Also you will need to detail any temporary or permanent retaining wall structures, associated with the earthworks, required for this project.
6.You also need to consider a safety plan (Safe Work Method Statement (SWMS)) for a particular aspect of the project.
7.Also you also need to consider environmental issues such as Sediment Ponds and Erosion & Sediment controls. Also you need to anticipate possible local community environmental concerns. South Creek is in the vicinity of Oran Park, which is already polluted.
8.Basically you are considering a development at this precinct, as if you were the earthworks contractor, constructing it and all that that entails. Assume that Council approval has been granted for your proposal. It is most important you do not contact the Local Council or Landcom directly. We will be giving you sufficient resources to complete this project without the need to contact LG Council or Landcom themselves.
This earthworks proposal has been prepared for the construction of an underground car parking area adjacent to the retirement village dimensioned 55m by 15m by 4m deep, designed for 30 cars.
Earthworks activities that will be carried out in the construction of the named project will include:
Establishing access into the underground car parking site
Installation and upgrade of current drainage systems and settlement ponds
Excavation and removal of unstable soils
Provision of temporary construction facilities
Current data available of the site
Effects of seasonal changes
This section will address how the effects of seasonal change will be dealt with. The earthworks activities will be categorized into two major activities: removal of unstable and aggressive soil and filling the site with aggregate material.
This process that involves removing all unstable soils from site generally involves excavation, windrowing and offloading of all the unstable soils. All the excavated soils are required to be windrowed within a period of 9 days after which they shall be offloaded from the site by a truck. These excavation works are strictly weather dependent and are required to be done in the dry season.
All earthworks contained in this proposal will be carried out in the following sequence:
Installation of drainage system
Upgrade access to the site
Installation of sheet piles
The current access route to the area is by road. Since the current site is an open field, demarcation of new access routes will be important. The access route will be compressed and hardcore poured to allow ease of movement for trucks.
Temporary accommodation and construction facility
The necessary temporary accommodation will be set up. It will include welfare activities for the earthworks staff, storage for the required machinery and a meeting room for the contactor. Furthermore, this facility will function as a temporary building facility that will contain the site office and meeting room which will function as storage and administrative facilities.
Monitoring devices will be installed on site before the commencement of any earthworks to ensure that the groundwater levels and ground movement are continually monitored. This is due to the presence of unstable and aggressive soils on site. The monitoring devices for this proposal include inclinometers, settlement plates and piezometers.
One dewatering well will be drilled adjacent to the site to assist reducing groundwater levels, increasing the workability of the ground soil. This is mandatory especially in areas that are detected to contain mineral soils so as to increase workability during excavation.
Establishing Truck Parking
In conjunction with upgrading the main access to the site, a parking area will be located adjacent to the western edge of the site. The parking bay for the trucks will be comprised of ballast that is poured atop of compressed ground. This parking will provide the prerequisite haulage that will function both as storage and parking. The temporary truck parking will from part of the underground parking eventually.
Establishing settlement pond access and location
After the construction of the main access to the site, the location for the settlement pond will be determined and its access is determined. The one access will be provided from the main access channel to the settlement pond.
Burch, D., 1997. Estimating Excavation. London: Craftsman Book Company.
Department, N. D. P., 2018. NSW Government. [Online] Available at: https://www.planning.nsw.gov.au/Plans-for-your-area/Priority-Growth-Areas-and-Precincts/South-West-Growth-Area/Oran-Park
Maginn, P., 17 Feb 2012. Planning Australia: An Overview of Urban and Regional Planning. London: Cambridge University Press.