tailieunhanh - Types of excavatinons

Các hệ thống hỗ trợ mặt đất được lựa chọn sẽ phụ thuộc vào bản chất của các cuộc khai quật đang được tiến hành. Cẩn thận xem xét cần phải được trao cho các vấn đề an toàn khi lập kế hoạch công tác, nơi khai quật liên quan đến khác ngoài hào nông và số lượng nhỏ vật liệu. Một nguyên nhân phổ biến của thương tích liên quan đến người lao động bị đâm bởi máy móc thiết bị khai quật bao gồm nơi máy móc được thúc đẩy vào, hoặc rơi vào một cuộc khai quật. | 10. TYPES OF EXCAVATIONS The ground support system chosen will depend on the nature of the excavation being undertaken. Careful consideration needs to be given to safety issues when planning the work where the excavation involves other than shallow trenching and small quantities of material. A common cause of injury involves workers being struck by excavating machinery including where machinery is driven into or falls into an excavation due to operator error or inadequate barricades. Barricades should be installed where necessary to prevent vehicles and equipment from accidentally falling into an excavation. Excavated soil should be graded away from an excavation to assist in vehicle control. A check should be carried out to ensure all drivers and operators have appropriate licenses and any certificates of competency required under the regulations. The regulations do not specify what support system is required for the diversity of excavation work which may be carried out. For complex excavation work such as excavation for deep sewers the ground support system should be approved in writing by an engineer experienced in this type of work. CỘ Mechanical excavation - open cut Bulldozers traxcavators and other types of earthmoving equipment are _ commonly used for open cut excavation. For all excavations operators must know the line the final depth of the excavation the approximate width of the excavation at the top and the location of any underground services or other hazards. Regulation The excavation line and any underground services or hazards should be marked. A trench should be marked along the centreline of the proposed excavation. Safe disposal of excavated material involves consideration of where any pipes have been temporarily positioned on the ground the placement of manifolds and well-points and the location and positioning of discharge pipes associated with dewatering plant in the case of wet ground unusual obstacles and existing conditions such as