Worksite Safety Update Promoting Safety in Road Construction
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Worksite Safety Update Promoting safety in road construction No 107 May 2011 In this Edition: West Gate Freeway Upgrade Wins the 2011 Australian Construction Achievement Award Page 1 Grass Mowing by Remote Control Page 2 Explosives Blast Management Plans for Projects Page 5 Rock Beaching Hazards and Their Control Page 6 M1 West Gate Freeway Upgrade wins the 2011 Australian Construction Achievement Award The upgrade of the M1 West Gate Freeway was chosen over six other Australia- wide finalists as the most outstanding example of construction excellence at the 2011 Australian Construction Achievement Award in Melbourne on the 19 May. The M1 West Gate Freeway Upgrade was constructed by the M1 Westgate Freeway Alliance. The Principal Contractors were Thiess and Baulderstone. Other partners were Hyder Consulting, Parsons Brinckerhoff and VicRoads. Safety was consistently excellent on the project and the Alliance also received the VicRoads Major Projects Safety Excellence Award last year. The project also received the VicRoads Major Projects Safety Innovation Award for the development and deployment of the first portable Variable Speed Limit Signs on a road project in Victoria. Many of the safety innovations first deployed on the M1 West Gate Freeway Upgrade are now benefiting the M80 Metropolitan Ring Road Project Upgrade. Facilitating safe worksites and optimum practical traffic flows of over 110,000 vehicles per day. Aerial view of the Montague Section of the M1 West Gate Upgrade Will Your Plant SWMS Prevent Roll – Over. Page 1 of 12 Do the Controls Include Construction Method? The upgrade of the West Gate Freeway, on the southern fringe of the Melbourne CBD, included: freeway widening, bridge works, the reconfiguration of access ramps and reconstruction of exiting traffic lanes. This work was completed safely while still handling the very heavy traffic of hundreds of thousands of vehicles that needed access through the corridor each day. This was achieved through extensive use of temporary safety barriers and truck mounted attenuators (TMAs). Despite extensive changes to the design concept that vastly improved functionality, the project was completed within budget and four months ahead of schedule. The other finalists were: Abbot Point Coal Terminal X50 Project, QLD – John Holland. Northern Expressway (NEXY) – Fulton Hogan and York Civil. Sydney Desalination Plant - John Holland and Veolia Water Joint Venture. Clem Jones Tunnel (CLEM 7) – Leighton Contractors Baulderstone Bilfinger Berger Joint Venture (LBBJV). ANZ Centre – Lend Lease. Robina to Varsity Lakes Track Extension, QLD – TrackStar Alliance. Congratulations to the M1 West Gate Freeway Alliance on their achievements. Grass Mowing by Remote Control The protection of Grass cutting operations against impact by errant vehicles has proven to be a challenge and although TMAs are used to protect mowers and their operator when close to high speed roads such as freeways, it is sometimes difficult to fully ‘shadow’ a moving grass cutting machine. Works adjacent to roads used by traffic is classified as high risk construction work under the OHS Regulations 2007. This is recognised in the Worksite Safety – Traffic Management Code of Practice 2010. The hierarchy of safety controls for roadworks was originally developed for construction work, however, it is increasingly applied to road maintenance activities – it being recognised that the risk presented to road construction work is similar to that presented to maintenance works. Because of the predominantly short term nature of maintenance works the use of road closures and temporary safety barriers is generally not practical. Truck Mounted Attenuators (TMAs) have proven to be a practical solution in many maintenance situations. The M80 Tulla Sydney Alliance (TSA) in their endeavours to improve safety during grass cutting are currently trialling a small highly manoeuvrable remote control mower known as a ‘Spider’ for grass cutting maintenance on the Metropolitan Ring Road. The removal of the operator from the machine potentially permits the mower to be controlled from a location further away from the road with the operator able to observe both mower and approaching traffic or for the operator to be protected by existing road safety barriers where practical. The TSA have developed a SWMS for the operation of the machine, in consultation with the remote control operator. Controls include the requirement for the pedestrian operator to be located outside the clear zone applicable to the road (> 9 metres for 80 km/h freeway). If the clear zone is not available then a TMA and / or speed reduction is required. Competency based training is required for the operator. Will Your Plant SWMS Prevent Roll – Over. Page 2 of 12 Do the Controls Include Construction Method? Remote Control Mower Trial on M80 TSA Project In addition to facilitating the removal of the operator from the high risk zone immediately adjacent to the freeway the machines low centre of gravity and high manoeuvrability permits the mower to be used in areas where brush cutters and slope mowers have traditionally been required. The ‘Spider’ incorporates fail safe features such that the machine will stop if the radio control signal is lost for any reason. Full guarding is in place to prevent stones being ejected and an amber flashing light is provided. The Tulla Sydney Alliance is to be congratulated for this initiative. A future update will be provided on the results of the trials. The ‘Spider’ operating adjacent to freeway. Will Your Plant SWMS Prevent Roll – Over. Page 3 of 12 Do the Controls Include Construction Method? Explosive Blast Management Plans for Projects WorkSafe Victoria has released two Guidance Notes for Blast Management Plans (BMP) and Safe Distances when Using Explosives. VicRoads projects are frequent users of Explosives where hard rock ground conditions are encountered. The use of explosives is subject to the Dangerous Goods (Explosives) Regulations 2000 and Shot Firers must hold a WorkSafe Victoria Licence for the use of explosives. Australian Standard AS 2187.2 Explosives – Storage and use. Part 2: Use of explosives also applies and includes the requirement for a Blast Management Plan. Blast Management Plan (BMP) The BMP is required for all VicRoads projects and should meet the following requirements: • explain the objectives of the blast • identify hazards and risks, including control and/or mitigation • identify site-specific requirements • introduce the blast as part of the overall task in a planned manner • control the blast process from design to initiation and in the event of a misfire • comply with the approval/contract specifications • ensure safety of the public, site personnel and surrounding properties • implement a review process to ensure that the objectives are met. The detail in the BMP depends on the size, location, nature and complexity of the blasting operation. It may be part of a site safety plan to address all hazards and risks at the site. Safe Distances when Using Explosives There has been a fatality and a number of incidents in recent years caused by rock (fly rock) thrown from explosive blasting operations. WorkSafe has developed the Guidance Notes to improve the management of blasting operations with the objective of ensuring blasts do not harm people in the area and limit damage to the environment. The Guidance Note Safe Distances when Using Explosives provides advice to employers and contractors about safe distances for general explosive blasting operations and setting up exclusion zones. For your convenience copies of the Guidance Notes are appended to this Update. Page 4 of 10 Rock Beaching Hazards and their Control Rock Beaching for bridge abutment erosion protection presents two major health and safety risks which require control. The first risk involves high risk construction work and the potential for personnel to fall down the steep abutment batter. The second involves potentially hazardous manual handling with the manual placement of heavy rocks. Hand placed rock beaching has been regulated via specifications on VicRoads projects due to concerns about manual handling injuries. The machine placement of rocks is preferred where practical and excavators are often used for this purpose. Rock weights are limited to weights of 12 kg in order to reduce body stress during repetitive manual placement when necessary. On the Anthony’s Cutting Project both machine placed and hand placed rock beaching has been placed on bridge abutments. For hand placed rocks they are presented to the works personnel by a Telehandler to significantly reduce the need for carrying the rocks. The risk assessments leading to the development of SWMS identified the potential for falls down the steep batters typical of rock beaching protected abutments, in addition to the potential for manual handling injury during the placement and handling of the rocks. The slopes are steep, above two metres and in addition a four metre vertical face fall potential existed at the lower level at some locations, increasing the risk and need for fall protection. The Anthony’s Cutting Alliance investigated, in consultation with the rock beaching contractors, two potential methods which could be utilised to prevent falls. One entailed the use of a temporary guardrail system that had been developed for the same work on the EastLink Project and the other involved the application of rope access equipment. Both have some practical limitations in that the ropes can