Information
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Audit Title
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Document No.
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Client / Site
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Conducted on
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Prepared by
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Location
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Personnel
Tunnels
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The excavation has a safe means of access and egres.
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A procedure based on the project risk assessment and tunnel safety plan identifies a process for ensuring safe access and egress within the tunnel, into and out of the tunnel including consideration of adequate access and emergency lighting, ventilation, self rescue and refuge provisions, temporary stairs and platforms.
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Tag board or other suitable entry control system.
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Processes are in place to ensure pedestrians are segregated, including physical barriers where practicable, from mobile plant and vehicle movements, including designated pedestrian access and haul roads.
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Clear pathways are provided and spoil piles are regularly moved.
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The shoring and battering is designed by a suitable qualified person and there are relevant drawings indicating the methods uesed.
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A procedure identifies a requirement and methodology to ensure geo technical investigation and ongoing monitoring processes of ground conditions and design of suitable controls and supports e.g.<br>Shoring <br>Battering <br>Shotcreting<br>Rockbolting<br>
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Installation of supports is in accordance with design.
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Mapping process of tunnel excavation against detailed design and engineering certification.
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Records of ground support design and method of installation.
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The tunnel is regularly inspected by a competent person to ensure controls are used and remain adequate.
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A procedure identifies a process for ensuring a geo technical engineer competent in the relevant tunnelling method(s) performs regular inspections of the tunnel considering (but not limited to) ground conditions, adequacy of stability controls, conformance with design and monitoring support performance.
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Daily inspection records.
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Training and competency records.
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Tunnel inspection plan.
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Barriers,signage and fencing have been established in and around the tunnel.
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Controls such as physical barriers, signage and temporary fencing have been erected in and around the tunnel and on the project site.
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Above ground and underground services have been identified and made safe.
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A procedure identifies the means for ensuring plant operations and tunnelling activities are isolated and sufficient warning provided.
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A procedure that identifies a process identifying services that could be contacted with during the course of tunnelling activities.
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Project risk assessment and relevant SWMS/JSAs identify and assess risk of contact with aboveground and underground service and outlines means and processes for preventing contact with services.
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Electrical and service exclusion zones have been identified, communicated and maintained on the project site in accordance with jurisdictional requirements.
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Non mechanical excavation means are utilised on the site when necessary.
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Service detection reports and diagrams.
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Service locations and depths are identified and locations marked on the project site.
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Signage and placards are erected in locations to warn workers of services.
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Physical barriers are installed to prevent inadvertent contact with services.
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Lockout and tag-out procedures and processes.
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Approvals and records of disconnection from service entity.
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The confined space aspects have been suitably identified, controlled and are continually monitored.
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The project risk assessment, tunnel safety plan and relevant SWMS/JSAs recognise the risk associated with confined spaces in tunnelling and ensure relevant controls are established consistent with the hierarchy of controls and relevant legislation, standards and codes.
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Confined space risks such as engulfment, flooding, atmospheric contamination and oxygen deficiencies are regularly monitored through atmospheric testing programs and inspection processes.
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Ventilation design plans, surveys and monitoring.
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Emergency evacuation provisions and procedures established and implemented.
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Test and inspection records available.
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The risks involved with mobile plant working in and around the tunnel have been assessed and controlled.
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The project risk assessment has identified the risk of mobile plant movement within the tunnel, assessed risk and outlined appropriate controls in accordance with the hierarchy, including physical barriers, warning devices, restricted work practices, work scheduling, sufficient illumination, Reflective clothing, site traffic movement etc.
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Adequate emergency procedures have been established for the tunnel.
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A emergency plan or response protocol that identifies potential emergency scenarios associated with a tunnel on the project. Scenarios must be relevant to site risks and may include (but not limited to)<br>Flooding and water egress<br>Contact with hazardous services including electrical and gas<br>Loss of power<br>Stability and collapse of tunnel and/or open excavation<br>Fall from height<br>Mobile plant rollover
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Drill records of tunnel related emergency response scenarios.
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The safety of the surrounding soils, structures and areas have been assessed.
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A procedure identifies a requirement to ensure investigations have been performed and controls put in place to protect surrounding soil structures and relevant risks have been assessed.
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workers within the tunnel are adequately trained and instructed, and are aware of the emergency procedures.
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A procedure identifies a requirement to ensure all tunnel workers have been instructed in safe entry and access and trained in specific emergency scenarios applicable to the project site.
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Emergency training records.
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Induction records.
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Possible water sourses have been identified and control measures implemented to remove the risk of flooding and/or engulfment.
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A procedure identifies a process for identifying and controlling potential risks of water flooding and/or engulfment with tunnels.
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Geo-technical review shall identify and assess the risk of rising, irruption, or inrush of water.
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Control measures to prevent flooding and/or provide early warning of flooding risk have been implemented on the project eg<br>Membranes <br>Sumps<br>Exploratory warning holes<br>lowering water table<br>Ground freezing ect <br>
