MGF Excavation Support Systems. Broad Street Rugby Football Club

Transcription

1 MGF Excavation Support Systems Broad Street Rugby Football Club PLANNING & CONTROLLING EXCAVATION WORKS Peter Dunnion - Regional Manager (Midlands & East Anglia)

2 Agenda MGF s commitment to improving excavation safety Excavation Support - Why Shore? Planning - Management of Shoring including change Controlling Excavations - Good Practice what you should do Questions

3 Commitment to improving Excavation Safety Chair CPA Shoring Technology Interest Group Member of Forum and Strategic Forum for Construction Authors of CPA Good Practice Guide Management of Shoring in Excavations Support Working Well Together and IOSH Initiatives throughout UK Support to CITB Shoring Courses and safety initiatives Work closely with HSE Support to Customer Training / Safety Initiatives Research & Development

4 Commitment to improving Excavation Safety VIDEO 1

5 Excavation Support Why Shore? Construction is one of the most dangerous industries in the UK Every year between 40 and 50 construction workers are killed on construction sites and over 500 seriously injured Excavations are notoriously dangerous due to the unpredictable nature of the ground conditions and associated risks include ground movement, collapse or cave-in, as well as potential impacts on surrounding structures, works and the public Every year between 2 and 6 construction workers are killed in collapsing excavations and between 40 and 60 are seriously injured Most fatalities occur in and around excavations less than 2.4m deep when either little or no temporary shoring has been provided

6

7 So what does good look like when Planning an excavation I want a hole this big..now! Ermm? Hey Boss is there any services here & how deep did you say Dig till you find a pipe..the one we put in last year Erm..can t remember if there was water I know what I want Just Do It Trial & Error I ve done this a 1000 times I want to do this for my country..good INTENTIONS Time is of the essence just keep going Answer: None of the above

8 Management of Shoring Process In order to ensure that temporary works activity is effectively and safely managed, there are 3 main areas of a simple process to follow: 1. Planning and Investigation Collate all relevant Information 2. Design Develop a safe solution 3. Construction - Implement Control measures

9 I Have access to all the information you need T W C Champion

10 Shoring Options Each excavation is unique in the combination of hazards it presents, the site restrictions and the plant and machinery available. Therefore careful planning and constant vigilance is essential in order to protect the workers and the public.

11 Shoring Options

12 Stage 1 : Planning & Investigation Principal / Main Contractor (PC/MC) Co-ordinator (TWC) Package Contractor Supervisor (TWS) Designer (TWD) Design Checker (TWDC) Stage 1 Start Notify / Appoint TWC Refer to Specialists HIGH Collate Information Inspect Site Evaluate Risk LOW/MEDIUM Collate Information Inspect Site T W C Remember me! TWC role must be allocated to a suitable person TWC must collate the available information on the site of the proposed works (normally requires an examination of existing information and a site visit) TWS may be required to be involved to assist at this stage By the end of this stage, sufficient information should be available to categorise the scheme, produce a design brief and carry out an initial risk assessment

13 Stage 2 : Design Principal / Main Contractor (PC/MC) Refer to Specialists HIGH Co-ordinator (TWC) Evaluate Risk Package Contractor Supervisor (TWS) Designer (TWD) Design Checker (TWDC) Stage 2 N Approve scheme Y Prepare design brief & risk assessment LOW/MEDIUM Prepare design brief & risk assessment Assess design v brief & ensure SSoW in place taking account of residual risks Prepare design brief & risk assessment Issue design documents N Check design OK v brief Y TWC ensures that a design and Safe System of Work (SSoW) are produced Design & check is produced taking account of the site specific hazards/risks Design is then assessed against brief for practicality to ensure a SSoW can be developed All parties must be clear on the need to identify hazards, eliminate them where possible, and use suitable control measures to reduce risks to an acceptable level As the design is developed the levels of Risk may change and updates must be communicated between the duty holders

14 Design Request Form

15

16

17 Stage 3: Construction Principal / Main Contractor (PC/MC) Approve approve Co-ordinator (TWC) Y Package Contractor Supervisor (TWS) Designer (TWD) Design Checker (TWDC) Issue Permit to Dig Brief site team Stage 3 N Record & approve change Y Issue Permits to Access/Dismantle Any change? Install shoring Inspect & maintain shoring Finish Record A system of permits to commence works is common practice: Permit to Dig & Permit to Enter (requires inspections of the excavation are carried out prior to each shift) This system includes a robust method for identifying change and dealing with it safely Design information must be communicated to site via easy to read drawings and specifications showing the installation and removal sequences and clearly identifying any residual risks for the site team to control.

18 Impact of Change Changes in environment. Design not followed and / or design assumptions invalid. Ground movement, excessive deflections not reported. Inexperienced teams on site. Installing kit more dangerous then the original task risk management.

19 Good Practice what you should do Any excavation works has the potential to be dangerous always consider shoring as an option Formal Process is essential The roles and responsibilities of those involved are key to successful Management Risk Assessment is at the core of the process and must be carried out continually throughout the works small changes can make a big difference Consult the experts there are lots of options and they offer free advice and design services

20 Safe Systems of Work & Other Guidance Documents Are Readily Available & Free to Download off the Internet.

21 QUESTIONS? QUESTIONS?