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Mount Druitt Commuter Car ParkReview of Environmental Factors3.2.3. Engineering constraintsThe key engineering constraints relating to the Proposal include:An existing partly demolished structure located on site;The existing western boundary retaining wall and security fence are to bemaintained. Some sections are being supported by the existing structure andwould need temporary propping during construction. Permanent support by thenew structure would be provided;An existing sub-station and associated underground high voltage lines to berelocated;Preliminary geotechnical investigations identified weak shale at depth. Tocompensate for this, pile footings may be required; andA requirement for the design to include provision for two additional suspendedlevels.3.3. Construction activities3.3.1. Work methodologyIt is anticipated that construction would commence in March 2011. The constructionduration for the works associated with the Proposal is estimated at approximately 11months, dependant on the construction program proposed by the contractor. Thiswould be developed further during the detailed design phase of the project. The keyconstruction activities are described as discrete tasks below however some may beundertaken in parallel or in a different order to that presented.The above construction duration estimate is based on the following approach toconstruction:Establish site boundary fencing;Establish erosion and sedimentation control measures;Demolish the existing suspended concrete slab / column structures;Remove redundant services;Hazmat survey and asbestos removal;Site clearing and establishment;Prepare for substructure i.e. drainage points and service relocation;Construct the piles, pile caps and footing beams;Construct stormwater drainage infrastructure including pits and pipe work;Construct the columns and walls;Construct superstructure (floor slabs and ramps);Construct the ground floor slabs;Install car barriers, screens and other non-structural elements; andUndertake external works such as landscaping and paving.KMH-2010123a REF Rev 4 doc Page 22 of 116Status: Final
Mount Druitt Commuter Car ParkReview of Environmental FactorsSite clearing and establishmentPrior to commencing work on site, the construction contractor would be required todevelop and implement the necessary pre-construction mitigation plans and measuresoutlined in any conditions of approval. This would likely include a ConstructionEnvironmental Management Plan and temporary pedestrian arrangements andsignage.Areas for workers site sheds, offices, lay down space and material storage would beprovided along the site frontage to North Parade. The size and arrangement of theseareas would be confirmed during detailed design and any need for additionalconstruction car parking would be considered in the construction traffic managementplan. Designated access points to the site for construction material deliveries would beidentified with signage and a site hoarding constructed for the safety of the public.All utilities present at the worksite would be identified through dial-before-you-diginformation and survey information and their physical location determined prior toworks commencing. Section 3.5 identifies the current scope of the utility adjustmentsrequired as part of the Proposal.The existing building structure would be demolished to allow for the complete use ofthe site for the commuter car park.Demolition of existing structure and site preparationThe existing partly demolished cinema structure on site would be demolishedaccording to a demolition plan. Existing retaining wall structures on the north, westand east boundaries would be retained along with the existing ground floor. Temporarypropping or protection requirements would be outlined in the demolition plan.All vegetation, existing surface material and any remaining topsoil would be removedand approved sub-base materials placed to provide a competent bearing for the floorslabs. Remediation of any identified contaminated areas would be undertaken duringthis stage. A variety of utilities would be needed in the car park and conduits would beinstalled in the required positions prior to pouring the new ground floor slab.Construction of pile footings, pile caps and footing beamsThe building would be supported on reinforced-concrete bored piers cast in-situ or padfootings and founded on rock. Design of the piers and pads would be in accordancewith the relevant Australian Standards and based on recommendations ofgeotechnical investigations to be undertaken prior to construction commencing.Once the piers have cured, the pier tops would be prepared for capping structures andwhere necessary connection to footing beams.Construction of columns and wallsConcrete columns are proposed of varying width from 300 to 600 millimetres.Concrete walls would also be constructed at the locations of fire stairs and in otherplaces to provide lateral stability to the building. Columns and walls would be formedand cast in-situ.Construction of ground floor slabs and suspended floorsDue to the size of the floor slabs, the slab on ground and suspended floors would berequired to be constructed in several pours each with temporary or permanentconstruction joints.KMH-2010123a REF Rev 4 doc Page 23 of 116Status: Final
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Commuter Car Park and Interchange P
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Transit services provided at Mount
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MOVEMENT SUMMARYMt DruittSouthern C
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MOVEMENT SUMMARYMt DruittSherbrooke
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Commuter Car Park Mt DruittVisual I
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Appendix AReport Number610.08297Pag
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Preliminary Site Investigation at63
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