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  • Heat stroke Paralysis of the central nerve for body temperature control Temperature of 40 degrees

Transcript

  • 1.  
  • 2. Safety measures by danger factor in summer What are the dangers that can be found in the construction site? Contents Analysis of the current status of accidents in construction sites
  • 3. Analysis of Accidents in Construction Sites
    • Analysis of accidents for the past 2 years
    • Types of accidents in 2006
    • Fatal accidents and accidents between June and August
  • 4. 12.8% increase in the number of accident victims ( 2,038 persons) 3.8% increase in the number of deaths ( 23 persons) Analysis of accidents for the past 2 years Analysis of Accidents in Construction Sites 609 15,918 2005 23 632 No. of Deaths 2,038 Increase·Decrease 17,956 2006 Accident Victims Category
  • 5. Fall 5,873 persons Falling to the same level 2,855 persons Collision 2,275 persons Struck by falling object 2,108 persons account for 73% of the total no. of accidents. 32.7% 15.9% 12.7% 11.7% Among the 17,956 victims in 2006, Analysis of Accidents in Construction Sites
  • 6. The no. of accidents occurring in summer (June~August) accounts for more than 26% of the total no. of accidents. Victims Accidents between June and August Analysis of Accidents in Construction Sites
  • 7. Deaths Fatal accidents between June and August The no. of accidents occurring in summer (June~August) accounts for more than 25% of the total no. of accidents. Analysis of Accidents in Construction Sites
  • 8. Safety Measures by Danger Factor in Summer
    • Downpour
    • Landslide
    • Collapse of form shore
    • Electric shock
    • Struck by falling object
    • Suffocation
    • Health problems in summer
    • Safety checklist
  • 9. Danger factors Landslide caused by downpour Damage to buildings/facilities due to the weakening of land or damage to underground utility works Suspension of construction and physical loss due to flooding Safety Measures by Danger Factor in Summer Safety measures for downpour
  • 10. Safety measures Stock up on emergency flood prevention materials and equipment. Organize and manage an emergency team. Check the current underground utility works and maintain a mutual assistance system with related organizations. Inspect the facilities around the site to prevent loods. Perform safety inspection and take action in advance against facilities that are vulnerable to rain. Safety Measures by Danger Factor in Summer
  • 11. Case of Accident and Actions   Death during landslide caused by downpour
    • Install slope protection.
    • Install hill top channel and raceway.
    • Install a drainage system.
    Safety Measures by Danger Factor in Summer
  • 12. Danger factors The rainwater percolates in the slope and loosens the soil. This causes landslide. Danger of retaining wall collapsing   - Loose soil caused by rainwater   - Earth pressure increase due to increase in rainwater Collapse of retaining wall and stonework due to damaged drainage system Safety Measures by Danger Factor in Summer Safety measures for preventing landslide
  • 13. Safety measures
    • Conduct safety inspection and take action in advance to prevent tunnel cave-in.
    • Prohibit the passing of cars or placing of materials to avoid increasing the load above the tunnel.
    • If the tunnel is in danger of caving in, or if there is danger of soil/rock falling, install a retaining wall or prohibit the entry of workers to the site.
    • Check the state of retaining wall and take safety actions if necessary.
    Safety Measures by Danger Factor in Summer
  • 14. 1 person was crushed to death when the land above the dug tunnel caved in.
    • Observe the ground digging surface gradient.
    • If impossible, install a retaining wall.
    Case of Accident and Actions Safety Measures by Danger Factor in Summer
  • 15. Danger factors Form shore collapses during the casting of concrete. Safety Measures by Danger Factor in Summer Safety measures for collapsing form shore
  • 16. Safety measures Investigate the form shore structure and observe the assembly instruction.
    • The performance of shore must be verified.
    • For those with height of more than 3.5m, a horizontal connector must be installed every 2m.
    • For the slope timbering, a wedge must be installed to distribute the weight on the post veneer.
    • In case of high floor or thick slave, the system shore must be used.
    • More than 2 steel pipe supports cannot be used.
    Safety Measures by Danger Factor in Summer
  • 17. Case of Accident and Actions Death caused by constriction by concrete when form shore collapsed during the casting of concrete
    • Inspect the form shore structure and construct based on the assembly instruction.
    • Install horizontal connectors.
    • Observe the casting time and order.
    Safety Measures by Danger Factor in Summer
  • 18. Danger factors Electric shock while handling electrical machineries and tools during the rainy season Electric shock caused by flooding in electrical facilities Electric shock caused by contact with electric chargers Safety Measures by Danger Factor in Summer Safety measures for preventing electric shock
  • 19. Safety measures
    • A temporary power receiving unit must be installed in a safe place with no possibility of flood.
    • Electrical machineries and tools must not be handled with wet hands.
    • Portable electrical machineries and tools must be unplugged before use.
    • Conduct safety inspection on wiring and temporary wiring for portable wiring.
    • Do not touch processing wires; install an insulation protection unit near the worker.
    Safety Measures by Danger Factor in Summer
  • 20. Case of Accident and Actions While installing a dust net from the external double scaffold, the worker got electrocuted.
    • Avoid electric wires or install insulation when working near electric wires.
    • Install an insulation protection unit on the charging wire.
    Safety Measures by Danger Factor in Summer
  • 21. Danger factors Danger of getting struck by falling objects from high places due to wind Safety Measures by Danger Factor in Summer Safety measures for preventing impact due to falling objects
  • 22. Safety measures
    • Various installations, safety notice boards, and load must be installed firmly and reinforced to resist strong wind.
    • Do not work during heavy downpour or strong wind. Take shelter until the weather improves.
    • Inspect the state of the net for blocking falling objects.
    Safety Measures by Danger Factor in Summer
  • 23. Case of Accident and Actions Collapse of scaffolding due to strong wind
    • Reinforce the connection of scaffolding to the wall.
    • If dust net or curtain net is installed on the scaffolding, make sure it is not affected by strong wind by installing a ventilation opening.
    Safety Measures by Danger Factor in Summer
  • 24. Danger factors Suffocation caused by the lack of oxygen due to the decomposition of organic matter of growing microorganisms that live in tanks, manholes, and pits during summer Suffocation caused by breathing in organic vapor when working with waterproof solution and paint containing organic solvent in a closed area Safety Measures by Danger Factor in Summer Safety measures for preventing suffocation
  • 25. Safety measures When working in closed tanks, manholes, sewage, or pits for a long time, make sure the oxygen content is above 18%. Install a ventilation unit when working with organic solvent in a closed space. Secure the pathway and conduct safety training for workers to enable prompt escape in case of emergency. Safety Measures by Danger Factor in Summer
  • 26. Case of Accident and Actions Breathing in organic vapor while working with waterproof solution and paint with organic solvent in a closed space
    • Install a ventilation fan and make sure the oxygen content is above 18%.
    • Measure the oxygen content before and during work.
    • Install an escape path that can be used for workers’ escape in case of emergencies.
    Safety Measures by Danger Factor in Summer
  • 27.
    • Install and manage a resting lounge where workers can rest from the heat while working in the construction site in summer.
    • Try not to work outside from 1pm to 3pm, the hottest times in summer.
    • Drink a glass of cold water every 15~20 minutes while working.
    Safety Measures by Danger Factor in Summer Measures for preventing health problems in summer
  • 28. Case of Accident and Actions Health problem due to overworking in hot summer
    • Avoid working outdoors for too long in summer.
    •     - Divide the working time and resting time reasonably.
    • Take in sufficient amount of water and salt.
    Safety Measures by Danger Factor in Summer
  • 29. 02 ▶ It is easy for workers who wear helmet and safety boots while working in construction sites to get athlete’s foot. Avoid getting athlete’s foot in summer. - Put on safety boots alternatively. - Maintain cleanliness by cleaning the feet regularly. - Consult a doctor and get treatment immediately once you develop athlete’s foot. Health Management Tip Safety Measures by Danger Factor in Summer
  • 30. 03 ▶ Workers working outdoors must maintain their health during summer. Drink cool water often. - Protect the skin and eyes from damage due to UV rays. - Do not work topless or expose too much skin under the sun. - Ensure sufficient intake of water and salt when working next to a road with poor radiant heat. - Avoid working between 1pm and 3pm, the hottest times during summer. Avoid working between 1 pm and 3 pm. Safety Measures by Danger Factor in Summer
  • 31.
    • Emergency action
      • Move to a cool place with shade and take off or loosen the victim’s clothes.
        • Give 1 liter of water and bring the victim to a hospital
      • if he/she loses consciousness
      • or the temperature of his/her body rises.
    Safety Measures by Danger Factor in Summer
  • 32.
    • Flood prevention plan
    Safety Measures by Danger Factor in Summer Safety checklist for the construction site in summer  
    • ○ Measure the forecasted amount of rainfall and draft drainage plan.
    • ○ Check the flood control materials.
      •    - Water pump (including a substitute in case one breaks down), sandbag, straw bag, spade, wheel cart, rain gear, and rain boots
    • ○ Check the emergency contacts.
    • ○ Check the organization and management of the emergency team.
    • ○ Check the measures to be taken during emergencies.
      • - Materials and equipment sheltering plan during downpour
    Prearranged plan Result Inspection Item
  • 33.
    • Inspection of facilities around the site
    Safety Measures by Danger Factor in Summer  
    • ○ Maintenance state of drainage facilities
      • - Check the drainage way.
      • - Install catchment well and grit chamber.
      • - Connection state with nearby drainage system
      • - Check the repair and maintenance state of the drainage way that is vulnerable during the rainy season.
    • ○ Check the operation state of the water pump.
      • - Check whether the water pump works.
      • - Check whether the water pump that works on gas in case of power failure is available.
    • ○ Safety state of temporary road for construction
      • - Safety of road and state of soil
      • - Check whether left-right drainage is installed.
    • ○ Check for cracks on the road.
      Facilities around the site Result Inspection Item
  • 34.
    • Prevention of collapse
    Safety Measures by Danger Factor in Summer   ○ Check the removal of earth and sand and falling rocks. ○ Check the entire drainage and cleaning. ○ Check for cracks on the wall or change in shape. Retaining wall  
    • ○ Check for any problem in slope state as well as whether the grade standard has been observed.
      • - Joint and crack
    • ○ Check the drainage way and maintenance.
      • - Hill top channel, raceway, drainage way
    • ○ Check whether slope protection measures have been taken.
      • - Vinyl tent, sandbag, and straw bag
    • ○ Check whether entry to the dug slope is prohibited.
    Dug slope Result Inspection Item
  • 35. Safety Measures by Danger Factor in Summer  
    • ○ Check the assembly instruction as well as whether the order has been followed.
    • ○ Research and inspection
      • - Check the intersection area as well as for any damage, change in shape, or fall-off.
      • - Check for any damage in the joining state in the supporting point.
      • - Check for any crack in braced wall.
    • ○ Check out the measure for the prevention of the horizontal support bucking.
      • - The connection part must be installed on the supporting point of middle pile.
      • - The machine or material to be supported must not be stacked.
      • - Check the jack intersection of the horizontal support and the stiffener used.
    • ○ Check the prevention of earth and sand outflow.
    • ○ Check the measurement management.
    • ○ Check the following when installing braced wall:
      • - Air space at the back of braced wall
      • - Reinforcement of area that will get wet in braced wall due to irrigation channel
      • - Any use of prohibited braced wall connection
      • - Installation simultaneous to digging
    Retaining wall Result Inspection Item
  • 36.
    • Electric shock prevention
    Safety Measures by Danger Factor in Summer  
    • ○ Safety state of temporary wiring
      •    - Safety during flooding
      •    - Height of gate and grounding
      •    - Danger sign prohibiting entrance
    • ○ Safety state of temporary cabinet panel
      •    - Outer grounding
      •    - Installation and lock state of cabinet panel locking device
      •    - Internal circuit marking for cabinet panel
      •    - Short circuit breaker on cabinet panel circuit
      •    - Protective cover in internal charger
      •    - Use of power outlet
    • ○ Other machines and small electrical tools
      •    - Outer grounding
      •    - Use of electrical drill, light projector
    Electric shock prevention     Result Inspection Item
  • 37. Safety Measures by Danger Factor in Summer  
    • ○ Installation state of wiring and portable wiring
      • - Exposure to road and pathway
      • - Existence of metal (make sure no metal is used)
      • - Use of waterproof outlet and plug when used outdoors
      • - Damage to insulation clothing
    • ○ State of exchange arch welder
      • - Make sure only an automatic electric shock blocker that passed the performance test is used.
      • - Outdoor grounding
      • - Check the use of wiring and holder standardized item as well as for any damage to insulation clothing.
      • - Insulation of the terminal connection area
    • ○ Groundwater pump
      • - Short circuit breaker
      • - Outdoor grounding
      • - Insulation of the terminal connection area
      • - Appropriateness of the water pump-raising rope (use manila rope)
    Electric shock prevention   Result Inspection Item
  • 38.
    • Suffocation prevention
    Safety Measures by Danger Factor in Summer  
    • ○ Installation and operation of the ventilation unit when painting in closed space, e.g., tank and water tank
      • - Avoid using excessive material when painting.
    • ○ When spray painting, always use a mask.
    • ○ When working at night, secure sufficient lighting.
    • ○ Check the oxygen content before working inside manholes, pits, or tanks.
      • - Make sure the oxygen content is above 18% before and during work by using a ventilation fan.
    • ○ Check the use of equipment with internal combustion engine inside the manhole or tunnel where ventilation is insufficient.
      • - Install a ventilation unit to maintain air quality when using a machine with internal combustion engine.
    Suffocation prevention   Result Inspection Item
  • 39. Safety Measures by Danger Factor in Summer  
    • ○ Check the oxygen content before working in a tank that had or currently contains inert gas such as argon gas.
      • - When oxygen content is below 18%, install a ventilation fan to maintain oxygen at above 18%.
    • ○ When using adhesive such as super glue (organic solvent) in closed space, install a ventilation fan.
    • ○ Check the oxygen content when installing a retaining wall in closed space in underground water purifier tank and water tank and dismantling the wall after curing or casting the concrete.
    • ○ Wear air-supplied respirator when working in a place with oxygen deficiency.
    • ○ Make sure there is a ladder or a fiber rope that can be used for workers’ escape and rescue during emergencies or accidents.
    • ○ Assign a person in charge of safety when working with organic solvent and conduct special safety training.
      Suffocation prevention     Result Inspection Item
  • 40.
    • Prevention of impact due to falling objects
    Safety Measures by Danger Factor in Summer  
    • ○ Appropriateness of installation of temporary materials or signboards
      • - Check whether the scaffolding meets the installation standard.
      • - Check the installation of ventilation hole to prevent the scaffolding installed outdoors from moving in case of strong wind.
      • - Check whether the platform is fixed.
      • - Check for any loose materials or parts on the roof.
    • ○ Checking the installation of net for blocking falling objects and its appropriateness
      • - Net installation and between scaffoldings, net between scaffolding and building
      • - Appropriateness of net angle and horizontal projecting part state (angle: 20~30°; projecting part length: more than 2m)
    • ○ Neatness of various materials
    • ○ Rotation limiting switch based on the tower crane’s mutual interference
    • ○ Stop working in case of strong wind and take emergency actions.
      Prevention of impact due to falling objects Result Inspection Item
  • 41. What are the Dangers That Can be Found in the Construction Site?
    • Fall
    • Struck by falling objects
    • Collision
    • Electric shock
  • 42. The scaffold must be fixed in a workplace that is more than 2m high. A safety guardrail must also be installed. What are the Dangers That Can be Found in the Construction Site? Working scaffold Fall
  • 43.
    • - Do not use a wooden ladder built on-site.
    • Prevent the ladder from falling.
    • Do not use a ladder for working.
    What are the Dangers That Can be Found in the Construction Site? Ladder
  • 44. Fix the opening cover or install a safety guardrail. What are the Dangers That Can be Found in the Construction Site? Opening
  • 45. Work after fixing the platform, safety guardrail, and elevating unit safely. What are the Dangers That Can be Found in the Construction Site? Portable scaffolding
  • 46. When a safety guardrail or a cover cannot be installed, install a fall prevention net instead. What are the Dangers That Can be Found in the Construction Site? Fall prevention net
  • 47. Install a net for blocking falling objects or a protective shelf outside the building and entrance/exit for use by the workers. Struck by falling objects What are the Dangers That Can be Found in the Construction Site? Net for blocking falling objects
  • 48. Control the entry of workers to a working area with danger of objects falling from above. What are the Dangers That Can be Found in the Construction Site? Controlling entry
  • 49. When using construction machineries, assign a signaler to prevent people from coming near the machines. What are the Dangers That Can be Found in the Construction Site? Construction machineries Collision
  • 50. Use short circuit breaker for electromotion machineries or tools. What are the Dangers That Can be Found in the Construction Site? Short circuit breaker Electric shock
  • 51. Ground the outer metal cover for electromotion machineries and tools. What are the Dangers That Can be Found in the Construction Site? Grounding
  • 52. Thank you.