Presentation is loading. Please wait.

Presentation is loading. Please wait.

Safety in Excavation IS 3764 : 1992 EXCAVATION Excavation Excavation. Any man made cut, cavity or depression in the earths surface formed by earth.

Similar presentations


Presentation on theme: "Safety in Excavation IS 3764 : 1992 EXCAVATION Excavation Excavation. Any man made cut, cavity or depression in the earths surface formed by earth."— Presentation transcript:

1

2 Safety in Excavation

3 IS 3764 : 1992 EXCAVATION

4 Excavation Excavation. Any man made cut, cavity or depression in the earths surface formed by earth.

5 Soil Collapse Utilities Hazardous atmospheres Adjacent structures Falls / Falling loads Access / Egress Vehicle traffic Mobile equipment Water accumulation Cave-in Excavation Hazards

6 Cave-in / Soil collapse Improper shoring. …..Excavation hazards

7 Collapse of shoring Falling loads Excavation hazards

8 Slip & fall of workmen Utilities …..Excavation hazards

9 Adjacent structures …..Excavation hazards Vehicular traffic

10 Access / Egress Mobile equipment. …..Excavation hazards

11 Soil collapse

12

13 Prior to Excavation Obtain a work permit Check Ground / Soil condition Check Ground / Surface Water Check the Location of Water Table Check Under ground / Overhead utilities Adjacent buildings Dynamic load / Traffic

14 Type A : Clay, sandy clay, clay loam Type B : Angular gravel (similar to crushed rock), silt, silt loam, sandy loam Type C: Gravel, sand, loamy sand,Submerged soil or soil from which water is freely seeping; or Submerged rock that is not stable Soil Classification

15 Preventing Soil Collapse Soil classification (Type a, b, or C) Sloping Benching Placing a shield. Shoring(Timber / Aluminum shoring Sheet piling

16 Your choice of protection Sloping Benching Shoring Shields Designed by a Registered Project Engineer

17 Simple Sloping Short term up to Stable Rock : 90 0 Type A - 3/4: Note :Greater than 20 feet deep shall be designed by a registered professional engineer.

18 Simple Sloping -Type A Soil Unsupported Vertically-Sided Lower Portion <12 ft Unsupported Vertically-Sided Lower Portion <8 ft

19 Supported or Shielded Vertically-Sided Lower Portion Simple Sloping -Type A Soil

20 Simple Sloping Type B - 1: Type C - 1½ : Note :Greater than 20 feet deep shall be designed by a registered professional engineer.

21 Benching Type A Type B (cohesive)

22 Basic components of shoring

23 Shoring in Footing foundation OUTWARD SLOPE ( 35* TO 40*) CONSIDERING ONGOING RAINY SEASON

24 Arrangements in Water Logged Area SUPPORT TO THE WALL OF EXCAVATED PIT

25 Timber Shoring Installations REFER TO DESIGN ENGR.

26 Utilities Underground PERMIT SYSTEM

27 EFFECTS OF UTILITIES ABOVE GROUND UNDER GROUND

28 EFFECTS OF UTILITIES EXPLOSION FIRE

29 UTILITIES PREVENTION Obtain work permit and get clearances from the concerned Electricity Water & Sewage Pipeline Communication Oil & Gas Pipe Line Use Detectors ( for More Reliable)

30 Water Accumulation Ground water Surface water

31 Hazardous Atmospheres Never Start Work if, Oxygen Level less than 19.5 % Permissible limit of the toxic gases exceeded. More than 20 % of Lower Explosive Limit. PRECAUTIONS Ventilation to over come the above said. Blocking the source, incase of toxic and flammable gases. (Using other effective controls to reduce the level of atmospheric contaminants to acceptable levels)

32 Adjacent Structures Ensure structure stability Shoring Bracing Evaluation by Professional

33 FALLING LOAD Gravity Weight of soil pile Weight of near by structures Weight of personnel &equipment Vibration PREVENTION Never operate a construction equipment within 2.5 m from the edge of the excavation. Stacking the material 1 Meter away from the edge of the excavation.

34 Access –Ladders every 9.14 m Length – Normal every 4.6 m length – Hazardous operation –Ramps with slope not more than 15 o –Stairs cut on earth

35 Vehicle Traffic Control Measures Traffic Management Plan Traffic Control Traffic Safety Vests Fencing Illumination

36 Traffic Control Device & Vest

37 Fencing Hard Barrication shall be provided, in the fall prone areas and if depth is more Physical barricades required always Must be placed 2m away from excavation edge. Standard fall protection required for vertical falls over 1.3m Traffic diversions Pedestrian walkway diversions

38 Reflective Cone Barricades Caution Signs

39 Temporary Lightings: Sufficient Area Lighting. Emergency Lighting with Power back up. ILLUMINATION

40 Excavation Inspections Daily Inspections by Competent Person Start of shift, as needed, following rainstorms or other hazard-increasing event Possible cave-ins Protective system failure Water accumulation Hazardous atmospheres

41

42 Safety awareness – Supervision Develope - personnel interested on Safety, Safe work procedures considering the ground realities. Awareness and motivating the supervisors concerned, Develop system to report, analyze and prevent Near- miss cases. Developing gang leaders and attitude,

43 Any Questions ?

44


Download ppt "Safety in Excavation IS 3764 : 1992 EXCAVATION Excavation Excavation. Any man made cut, cavity or depression in the earths surface formed by earth."

Similar presentations


Ads by Google