by clicking the arrows at the side of the page, or by using the toolbar.
by clicking anywhere on the page.
by dragging the page around when zoomed in.
by clicking anywhere on the page when zoomed in.
web sites or send emails by clicking on hyperlinks.
Email this page to a friend
Search this issue
Index - jump to page or section
Archive - view past issues
Concrete In Australia : December 2011
Concrete in Australia Vol 37 No 4 47 Onsite, a thermometer was used to test the discharge temperature of each load. Batching with ice was used to ensure the temperature remained within the specified limits at all times. 3.6.2 Placement/compaction and finishing e majority of concrete on the project was placed using a crane and kibble due to the construction method being based on 50 t crawler cranes and the relatively small quantities in each bridge pier (13.5 m3). Purpose made tremie pipes were fabricated to ensure that the concrete was placed within the tolerances of the specification for discharge height. Generally two internal vibrators were used during a pier pour. e concrete placement at each pier was initially overseen by both construction supervisors and design staff to ensure that the concrete was managed and placed in a satisfactory manner. e pier reinforcing was exceptionally dense around the anchor locations and as such, vibration in this area was given significant attention. Diligent vibration coupled with a well designed steel formwork allowed the project to produce very high quality in- situ concrete piers. 4.0 CONCLUSION Upgrade of the concrete gravity Wellington Dam to modern standards has been undertaken using an alliance delivery method. rough this process, a number of innovations have been applied to the management of the concrete in the project to ensure the technical requirements of strength and durability are achieved in the most economical way. rough careful planning and design, all the technical requirements of the project have been achieved and the project was completed ahead of schedule, under budget and with an impeccable safety record whilst meeting all stakeholder and project objectives. ACKNOWLEDGEMENTS e Wellington Dam Alliance wishes to acknowledge the support and permission of the Water Corporation of Western Australia to prepare and present this paper. REFERENCES 1. ANCOLD, 2000. Guidelines on Assessment of the Consequences of Dam Failure. Australian National Committee on Large Dams. 2. ANCOLD, 2000. Guidelines on Selection of Acceptable Flood Capacity for Dams. Australian National Committee on Large Dams. 3. ANCOLD, 1998. Guidelines for Design of Dams for Earthquake. Australian National Committee on Large Dams. 4. ANCOLD, 2009. Guidelines on Design Criteria for Concrete Gravity Dams --DRAFT. Australian National Committee on Large Dams. 5. Geo-Eng, 2002. Wellington Dam Safety Review. D&DSS Report No. R1473. Geo-Eng Australia. Figure 7. Widening of the deck at the northern abutment.