Pipe Jacking Hazards + Controls Final 1


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PJA Health &Safety Briefing:

PJA Health &Safety Briefing Typical hazards in pipe jacking and common control measures

PJA Health & Safety Briefing:

PJA Health & Safety Briefing This health and safety briefing is divided into three sections: Pipe Jacking Association health and safety policies and industry specific standards. Hyperlinks connect to publicly available sources Typical hazards likely to be encountered on pipe jacking sites Common control measures

Overview: PJA H&S Policies:

Overview: PJA H&S Policies The Pipe Jacking Association is the UK trade association that represents all major contractors and suppliers in the UK pipe jacking and microtunnelling industry Health & Safety is an overriding concern of members and it is mandatory that all personnel are certificated and undergo a comprehensive safety induction In addition to established construction industry guidelines all members undertake to comply with a range of industry specific safety standards

Industry Specific Standards:

Industry Specific Standards The PJA is represented on a range of industry safety standard bodies and has provide major inputs to: BS 6164: 2011 – Code of practice for health and safety in tunnelling in the construction industry BS EN 16191 – Tunnelling machinery safety requirements HSE/BTS/PJA Tunnelling and Pipe Jacking Guidance for Designers PJA Guidance on Hand Tunnelling BTS Guide to Good Practice: The management of hand-arm vibration in tunnelling

Site Investigation and CDM:

Site Investigation and CDM Site investigation, both factual and interpretative, is a necessary precursor to any underground project in order to ascertain ground characteristics and water presence that may impact on any underground excavation and to ensure a safe working environment SI together with compliance with Construction (Design and Management) Regulations place an onus on promoters, designers and contractors to ensure that safe working practices, instruction, training and supervision form and integral part of any tunnelling project design and implementation

Guidance for designers:

Guidance for designers The HSE/PJA/BTS: Guidance for Designers indicates acceptable drive lengths based on the occupational health and safety risks arising from heavy physical work in confined spaces and also rescue requirements This document is for guidance only and other alternatives are permissible subject to robust technical and risk assessments – an extract appears below (Resource: http://www.pipejacking.org/Resources/HSEPJAGuidanceV2.pdf )

Hand Excavation:

Hand Excavation Whilst the majority of pipe jacks are undertaken by machine there are occasions when mechanical excavation is not reasonably practicable The PJA has published: Guidance on the design of hand excavated pipe jacks (Resource: http://www.pipejacking.org/Resources/PJAGuidancev2download.pdf ) This document provides guidance on mitigating any risk from HAVS and noise and also the limitations of hand excavated pipe jacks in various ground conditions

Training and Risk Management:

Training and Risk Management The PJA has worked closely with CITB and TunnelSkills in the development of NVQs for specific pipe jacking and tunnelling operations (Resource: http://tunnelskills.org/training/default.asp?tabid=7 ) This is aligned to the awareness of tunnel e ntry procedures and a defined level of tunnelling safety knowledge, both mandatory requirements for all underground operatives (Resource: http://tunnelskills.org/safety/default.asp?tabid=6 ) Risk management is also a major feature of project delivery and the PJA recommends that client organisations operate to the Association of British Insurers/British Tunnelling Society publication: Joint Code of Practice for the Risk Management of Tunnelling Works in the UK. An international version is also available (Resource: https://www.britishtunnelling.org.uk/?sitecontentid=881C32EC-21C8-41A9-8B7A-F8D530E7987E )

NVQs in Tunnelling:

NVQs in Tunnelling NVQs reflect workplace skills and as such make a significant contribution to safe working practices. Key areas relative to pipe jacking and microtunnelling are: Shaft Miner Tunnelling Machine Operator Pipejacking/ Microtunnelling Operative Spoil Removal Equipment Operative Separation Plant Operative (Resource: http://www.tunnelskills.org/qualifications/default.asp?tabid=8&contentid=21 )

Typical Hazards in Pipe Jacking:

Typical Hazards in Pipe Jacking Pipe Jacking is an integrated system linking: ground conditions shafts pipes shields jacking loads engineering

Typical Hazards:

Typical Hazards Tunnel excavation Confined space/tunnel environment Man/machine interface Stored energy Material usage Working at height/depth Lifting operations Occupational health Issues

Tunnel Excavation - BS6164 cl 7.14:

Tunnel Excavation - BS6164 cl 7.14 Face stability (Reference: BS6164 cl 9.1.1) Ground water inundation (Reference: BS6164 cl 9, cl 10) Ingress of hazardous materials (Reference:BS6164 cl 7.4.4) Unexpected obstructions, both naturally occurring and man made (Reference: BS6164 cl 5) Over/under excavation (Reference: BS6164 cl 7.16)

Tunnel Environment:

Tunnel Environment Environmental conditions (Reference: BS6164 cl 4.4.5) Restricted access (Reference: BS6164 cl 7.12.5) Fire (Reference:BS6164 cl 13 EN 16191 cl 4.6b) Slippery surfaces Underground plant (Reference: BS6164 cl 24)

Man/machine interface:

Man/machine interface Movement of plant above and below ground (Reference: BS6164 cl 23.1 23.4 EN16191 cl 4.1a) Contact with exposed moving parts (Reference: EN16191 cl 5.4) Uncontrolled movement of hydraulic jacks (Reference: BS6164 cl 7.14.1 EN16191 cl 4.9)

Stored Energy :

Stored Energy Electrical equipment (Reference: BS6164 cl 25 EN16191 cl 4.2) Pneumatic systems (Reference: BS6164 cl 24.2) Hydraulic systems ( Reference: BS6164 cl 24.3 EN16191 cl 4.1c) High pressure water systems (Reference: BS6164 cl 24.3 EN1691 cl 4.1c) Slurry and slurry separation systems (Reference: BS6164 cl 23.6)

Materials Usage:

Materials Usage Manual handling (Reference: BS6164 c4.4.6.2 & Table 2 EN16191 cl 5.2.5) Pipe handling and storage (Reference: BS6164 cl 20.6) Slurry (Reference:BS6164 23.6) Spoil (Reference: BS6164 23.7) Additives and chemicals (Reference: BS6164 cl 4.4, Table 3, 7.15)

Working at height/depth - BS6164 cl 22.5 :

Working at height/depth - BS6164 cl 22.5 Operatives falling down shaft (Reference: BS6164 cl 20.6 & 20.7) Tools or materials falling down shaft (Reference: BS6164 cl 20.6) Access/egress (Reference:BS6164 cl 20.7, EN16191 cl 4.1e)

Lifting Operations - BS6164 Sec 21 :

Lifting Operations - BS6164 Sec 21 Working over shafts Working within compounds Lifting over personnel Interaction with the public/traffic

Occupational Health - BS6164 cl 4.4:

Occupational Health - BS6164 cl 4.4 Noise (Reference: BS6164 cl & Table 2, 19.1, 19.2 EN16191 cl 4.4, Annex C) Air quality (Reference: BS6164 cl 12,15,16 and 11.3) Vibration (Reference: BS6164 Table 2 and 19.3) Heat (Reference: BS6164 Table 2 & EN16191 cl 4.3) Eye injury/damage Weils disease (Reference: BS6164 cl 443, 4.4.5, C126) Working hours (shift patterns) Stress

Typical Control Measures to Reduce Risk:

Typical Control Measures to Reduce Risk Pipe Jacking is an integrated system linking: ground conditions shafts pipes shields jacking loads engineering

Tunnel Excavation Control Measures:

Tunnel Excavation Control Measures Face stabilisation TBM choice Monitor and control rate of advance/ excavation Manage/control water ingress Ventilation Non intrusive surveys

Tunnel Environment Control Measures:

Tunnel Environment Control Measures Atmospheric monitoring Ventilation Restrict access Use permits systems Training Competence Planning Emergency response Housekeeping Fire suppression

Man/machine interface Control Measures :

Man/machine interface Control Measures Safe systems of work Planning and set-up Segregation Guarding Competent operatives and operators Effective communications systems Failsafe systems Behaviour based safety

Stored Energy Hazards Control Measures :

Stored Energy Hazards Control Measures Safe systems of work Competent personnel Inspection/maintenance regime Isolation protocols Pressurised systems training

Material Usage Control Measures:

Material Usage Control Measures Training and competence Mechanical handling, where practical COSHH assessment and awareness Adequate ventilation Appropriate PPE

Working at height/depth Control measures:

Working at height/depth Control measures Safe systems of work Training and competence Security Adequate barriers Scaffolding Use of MEWPs, where practical 2 means of access/egress from shafts

Lifting Operations Control measures:

Lifting Operations Control measures

Occupational Hazards Control Measures:

Occupational Hazards Control Measures Constructing better h ealth Behavioural based s afety Regular health surveillance Monitoring conditions Minimise exposure Appropriate PPE for the task


Overview This list of hazards is not exhaustive; others may be present based on site conditions Control measures are intended as guidance only Hazards and associated risks should be fully investigated and appropriately and properly assessed


Summary PJA members are committed to stringent health and safety standards Training policies contribute to this commitment Research carried out at leading universities ensure products and practices are fit for purpose Mechanisation combined with robust risk management procedures ensure that health and safety of personnel is a priority Environmental standards and activities ensure that the disposal of process arisings contributes to sustainability and environmental efficiency

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