Safety code for piling and other deep foundations
1969 Edition

While IS 5121 does not list exhaustive mandatory checks, it emphasizes thorough safety inspections including: visual examination of all pile driver components for signs of wear or damage; verification of load capacities and stability of supporting cranes or rigs; ensuring secure fastening and correct alignment of piles in the leads; functional testing of safety features such as emergency stops and overload protection; confirming electrical safety measures including grounding; and assessing operator training and communication readiness. Maintaining a detailed inspection log and repairing or replacing faulty equipment before operations is also recommended.

IS 5121 mandates pre-entry testing for toxic gases like methane, hydrogen sulfide, and carbon monoxide using appropriate gas detection instruments. Workers must be equipped with detector lamps capable of signaling flammable gases, oxygen deficiency, and elevated carbon dioxide levels. Upon detection of hazardous gases, immediate reporting to the employer is required, and all well sinking activities must cease until conditions are safe. Additionally, when working under compressed air, adherence to IS 4138-1967 safety protocols is compulsory to manage gas risks effectively.

According to IS 5121, all personnel working close to pile driving activities must wear helmets conforming to IS: 2925-1964 to protect against head injuries. When handling creosoted wooden piles, workers should also use protective gloves and barrier creams to prevent skin and eye irritation from creosote exposure. Proper training in the use of these protective items is essential to minimize risks during pile driving operations.

To mitigate soil subsidence risks during bored piling, IS 5121 recommends conducting comprehensive subsoil investigations beyond the foundation depth to design well components like steinings and cutting edges appropriately. Prior geological assessments should identify rock slopes, fissures, and other potentially unstable features, enabling preventative measures against sudden tilting or soil shifts. Installing fell-tales on adjacent older structures helps monitor movements, permitting timely intervention. Additionally, gas detection before personnel entry ensures safe working conditions, collectively reducing subsidence hazards.

IS 5121 specifies that floating pile drivers must be equipped with adequate firefighting apparatus, including suitable fire extinguishers for oil and electrical fires, fire buckets, and hoses or water supplies. It also requires availability of a rescue boat on standby for emergency evacuation. Crew members should receive training in emergency response and firefighting to ensure prompt and effective action in case of fire incidents, thereby enhancing overall safety on floating pile driving units.