SAFE SYSTEMS FOR PILING OPERATIONS

Transcription

1 SAFE SYSTEMS FOR PILING OPERATIONS TYPE & METHOD OF CONSTRUCTION OF PILE BORED CAST-IN-SITU (BCIS) BCIS WITH CONVENTIONAL RIG BCIS WITH ROTARY RIG DRIVEN CAST-IN-SITU (DCIS) DCIS WITH CONVENTIONAL DP RIG DCIS WITH BSP (PNEUMATIC) HAMMER

2 CONSTRUCTION OF BCIS PILES WITH CONVENTIONAL METHOD

3 Tripod Piling is labour intensive and physically demanding Safety Precautions for Tripod Piling Keep site surface clean and free from water and slurry. Make sure legs are on hard stable ground and equally spaced. Don't pull or drag anything, which is too heavy for you - get help. Only trained and authorised personnel to drive dumpers and winches. Keep well clear of tools when picking them up or laying them down.

4 Only authorised persons to tip shells, keep rope parallel with shell body. Don't leave casing caps suspended - brakes do fail. Inspect ropes regularly, cut and serve or replace when required. At all times, stand well clear unless you have a task to do. Make sure the winchman and the operative each know what the other is doing. Keep others clear whilst you are working the hole, protect the hole when you are not. Backfill the empty bore - always. Follow your Company Procedure for climbing the legs, rigging snatch blocks and using leg chains. TEAMWORK IS SAFE WORK

5 Driven Piling By BSP Hammer attached with TFC 280 Crane

6 Driven Piling Keep clear of all loads being hoisted. Keep hands and feet clear when pitching casings or preformed piles. Move machine clear of pile before working on the driven unit Never work on or under a suspended hammer, lower it or use the safety bar (monkey pin). Always wear ear protection whilst driving is in progress. Long exposure to loud noise damages hearing for life. Wear eye protection when plumbing, setting rake or taking sets on concrete piles. Pieces of concrete dropping from heights can seriously damage eyes. Make sure the driver can see you, or knows what you are doing at all times.

7 Always use the safety harness and line when more than 2m above ground, unless you are on a fenced platform. Don't put hands in danger when jointing piles or changing packings. Always have a banksman when manoeuvring the rig, particularly during reversing. Keep work area tidy avoiding trip hazards. Use a sound wire sling when pitching piles, never use the lifting eye or hook alone. Ensure smouldering timber does not catch fire. Protect exposed re-bar, ie setting out pins, with cem-caps or similar.

8 ROTARY PILING PILING BY HR RIG

9 SCHEMATIC CONSTRUCTION SEQUENCE OF BORED PILES USING ROTARY RIG BENTONITE PROCESSING PLANT DESANDED BENTONITE C.P. DERRICK ROTARY RIG TELESCOPIC KELLY SERVICE CRANE HYDRATED BENTONITE STORAGE & DRAW-OFF TANK RETURN & SETTLING TANK FRESH WATER INLET B.P. WINCH AUGER CASING PILE CENTRE UNLINED BORE AUGER BENTONITE SUPPLIED AS REQUIRED DURING BORING BENTONITE MIXING ARRANGEMENT DESANDER UNLINED BORE UNLINED BORE CHISEL RIG CENTERING FREE BORING FOR CASING FIXING CASING DRIVING PILE BORING UPTO ROCK LEVEL SOCKETING IN ROCK SOCKETING IN ROCK ( CHISELLING ) BENTONITE PROCESSING PLANT DESANDED BENTONITE REINF. CAGE FLUSHED BENTONITE TO AIR COMPRESSOR RETURN & SETTLING TANK TRANSIT MIXER BENTONITE SUPPLY INLET EXTRACTED CASING AIR HOSE BENTONITE MIXING ARRANGEMENT DISPLACED BENTONITE PUMPED TO RETURN TANK DESANDER TREMMIE PIPE POURED CONCRETE CONCRETED PILE SHAFT CAGE LOWERING CAGE LOWERING COMPLETED FLUSHING PILE CONCRETING CASING EXTRACTION SCHEMATIC CONSTRUCTION SEQUENCE OF BORED PILES USING ROTARY RIG ITD CEMENTATION INDIA LTD

10 BORED CAST-IN-SITU PILING OPERATION RIG POSITIONING & CENTERING

11 BORED CAST-IN-SITU PILING OPERATION FREE BORING FOR CASING FIXING

12 BORED CAST-IN-SITU PILING OPERATION CASING DRIVING

13 BORED CAST-IN-SITU PILING OPERATION CASING DRIVING

14 BORED CAST-IN-SITU PILING OPERATION PILE BORING

15 BORED CAST-IN-SITU PILING OPERATION BENTONITE SUPPLY PILE BORING

16 BORED CAST-IN-SITU PILING OPERATION CAGE LIFTING & LOWERING

17 BORED CAST-IN-SITU PILING OPERATION CAGE LIFTING & LOWERING

18 BORED CAST-IN-SITU PILING OPERATION FLUSHING

19 BORED CAST-IN-SITU PILING OPERATION FLUSHING

20 BORED CAST-IN-SITU PILING OPERATION Flushed Bentonite Compressed Air Inlet Bentonite Inlet FLUSHING

21 BORED CAST-IN-SITU PILING OPERATION PILE CONCRETING

22 BORED CAST-IN-SITU PILING OPERATION PILE CONCRETING

23 PILE CONCRETING

24 BORED CAST-IN-SITU PILING OPERATION CASING EXTRACTION

25 ROTARY PILING Always ensure rig is working on a firm and level platform. Do not climb up on Vertical Auger / bucket for cleaning. Always stand well clear of the Auger / bucket when boring and discharging spoil. Maintain good access to and from the Panel at all times. Place the gratings on the pile as soon as possible.

26 BORING OPERATION BY ROTARY RIG

27 Keep people away from Pile, always protect if left unattended. Always ensure cages are slung correctly when being inserted in the Panel. Keep fingers and feet well clear when inserting cages. Pile less than 750mm in diameter must never be entered. When it is necessary to enter a Pile special precautions must be in force. Ropes and slings are subject to heavy wear, inspect frequently and replace as necessary.

28 CAGE LOWERING

29 Guarding and Clean of Grab Whilst boring is in progress, ensure that the Banksmen is provided with Safety harness tied up with rigid body away from Crane. Make sure build up of spoil does not erode the distance

30 A controlled zone must be established. This is defined as the area around the slew area at the back of the rig and which includes the Pile and around the spoil heap. From the front of the rig the zone extends beyond the bore and spoil heap by two metres. Only the banksman will normally be within the controlled zone, and will be in charge of any other persons who need to be there. The demarcation of the controlled zone will depend on the circumstances. As a minimum, the area will be demarked by ropes and pins, where the piling contractor has sole possession of the site. Where ground workers or other trades are working nearby, the demarcation may be crowd type fencing or Heras fencing. Separation from the public will require a full site hoarding.

31 The loaded Augur must be slewed close to the ground in a controlled manner. The Banksman is in charge of operations in the controlled zone. He must be a trained CTA Slinger Signaller and have receive one day s safety training in the past 12 months and be clearly identified.

32 CONCRETING OPERATION

33 REMEMBER LUMPS OF CLAY ARE AS HEAVY AS CONCRETE AND CAN CAUSE INJURY IF SPUN VIOLENTLY FROM THE AUGER. TAKE CARE AND KEEP IN CONTROL.

34 THANK YOU Prepared by Manish Ghodeshwar ITD Cementation India Limited Kalina, Mumbai