Accident & Incidents Investigation Techniques

RAJASTHAN ASSET DEVELOPMENT PROJECT SPEARHEADING HEALTH, SAFETY & ENVIRONMENTAL PERFORMANCE IMPROVEMENT UTILISING LATEST TECHNOLOGY

Excavation & Ground Disturbance Safety Excavation: A man-made cut, cavity, trench, or depression formed by earth removal. Trench: A narrow excavation. The depth is greater than the width, but not wider than 4.57 m (15 feet.) Each year in the construction and hydrocarbon industries many workers are injured & killed due to failure to follow common safe work practices during excavation work activities. Excavation Inspection Tag

Common Excavation Hazards • Damage to underground utilities (electrical, FOC Cables, Pipe lines etc. • Excavation cave-in & collapse • Struck by falling objects • Being hit, or crushed by machinery • Fall in to excavation, Electrocution • Asphyxiation due to lack of oxygen or toxic substances

Provided support for the adjoining existing structure

Exposed pipeline provided additional support to avoid

Exposed cable provided additional sleeve protection

Control measures • Mark the area of excavation and arrange the resource as per the depth of the excavation. • Conduct underground survey (Using Scanner and / Trial pit) and identify the underground facilities. • Obtain work permit and excavation certificate. Implement all PTW control measures and JSA. • Don’t perform mechanical excavation within 2m radius of identified underground facility. Perform mechanical excavation only if work permit is permitted to do so. • A close supervision shall be provided for all excavation activates. • Any excavation more than 1.2 meter deep must be adequately supported on the sides by proper slopping / benching / shoring or shielding for personnel protection. • Stability of adjacent structure need to be ensured and provide adequate support for the same if required • Excavated material should be kept at least 1.5 m away from the top edge of excavation. • Ensure safe means of access and entry / exit for excavations deeper than 600 mm • Protection for all excavations edges. (Sloping, Shoring etc..) • Excavated area shall be barricaded by hard barricading and installed sign boards. Bulletin /October 2018