1. Precautions during pile foundation construction:

1. All operators and workers must wear safety helmets, and are not allowed to wear slippers to work or work after drinking.

2. Operators of special equipment must hold relevant certificates, and a copy of the operation certificate of special equipment should be posted in an eye-catching position on the drilling rig.

3. Before the drilling rig enters the site, the construction site must be leveled and filled to ensure that the drilling rig does not tilt or overturn under normal operation.

4. Before the drilling rig starts operation, it is necessary to check whether all components are in good condition, whether the brakes are sensitive, and whether the wire rope is broken. Drilling operation can only be carried out after inspection is qualified. During drilling operation, the drilling rig should be maintained regularly.

5. The multi-purpose distribution box of drilling rig should be in good condition, locked and managed by special personnel. The protective grounding of all mechanical equipment must be firm and reliable, and the leakage circuit breaker is sensitive.

6. The mud pit must be excavated at the location designated by the technician. Safety protective railings must be set around the mud pit with a height of not less than 1.2m, and relevant safety warning signs should be hung.

7. When burning the hammer, measuring the hole depth and taking slag samples, do not operate under the hanging hammer. You must drop the heavy hammer to the ground before starting the operation.

8. When the rig breaks down and needs maintenance, drop the crane hammer to the ground first, then cut off the power supply, and then carry out maintenance.

9. The completed piles should be backfilled in time to prevent accidents. The piles that can't be backfilled in time should be enclosed with safety nets and hung with warning signs.

2. Safety of electricity consumption:

1. Drilling rig construction must comply with the regulations of "one machine, one brake, one leakage, one box" for tn-s and two-pole protection of three-pole distribution, and make safety warning signs for electricity consumption during construction.

2. The distribution box shall be managed and maintained by special personnel. The signature of the disclosure person is signed by the disclosure person. Note: This form is in duplicate, one copy is kept and the other copy is kept by the team. Page number of safety disclosure of bridge bored pile: 2/3 name of construction unit name of project disclosure part of China Coal No.3 Construction No.33 Engineering Office Huang Zhuang Bridge pile foundation disclosure time year month day work type delivery contents 3. Three-core rubber cable must be used for lighting lamps used on site, yellow-green connection must be used to protect the zero line of lampshade, leakage switch should be installed, handle should be insulated, the connection must be firm, and the installation position should be far away from inflammable and explosive articles.

4, it is forbidden to pull wires and electrical equipment. Non-working electricians shall not engage in electrical work.

5. All mechanical equipment must be grounded.

6. The distribution box and switch box should be installed correctly and firmly, and the mobile distribution box and switch box should be installed on a solid bracket. The height between the lower part of fixed distribution box and switch box and the ground should be greater than 1.3m and less than 1.5m；; The distance between the movable type and the ground should be greater than .6m and less than 1.5m.

III. Safety measures for steel bar processing plant:

(1) Operation requirements of mechanical equipment: The mechanical equipment of steel bar processing plant includes steel bar bender, cutter, straightener, electric welding machine and lifting equipment, and each equipment must be implemented in accordance with the equipment operation regulations, with complete equipment operation procedures and safety identification signs, and all electrical equipment must be provided with grounding protection. Safety regulations for the use of electric welding: Before welding, first check whether the welding machine and tools are in good condition, safe and reliable. For example, whether the insulation between the electrode holder and the welding cable is damaged, whether the shell of the welding machine is grounded and whether the contacts of the welding machine are in good contact. It is not allowed to start operation without safety inspection. The welding machine should be placed in a dry and insulated place.

1. Before use, check whether the insulation of the primary secondary line is good and whether there is a protective cover at the wiring. Whether the electrode holder is in good condition and whether the outer shell has zero protection. It can be used only after it is confirmed that there is no problem.

2. In wet working environment, in order to prevent electric shock, you must wear insulating shoes with rubber plates or other insulating pads under your feet. It is best to change jobs between two wheels in order to look after or monitor each other.

3. In case of live electricity, for safety, the electrode holder shall not be clamped under the arm to move the workpiece to be welded or hang the welding cable on the neck.

4. When the welding joint is changed and the welding piece needs to be connected to the secondary circuit, the safety device should be replaced. When the welding machine fails, it needs to be overhauled, or the welding machine needs to be moved from the working place, and the power supply must be cut off when the work is finished or temporarily left the working site. (2) Personnel training: workers must be given pre-job training before entering the site to improve the safety awareness of operators, who should consciously abide by the basic requirements of on-site safety; On-site technicians timely investigate and remove potential safety hazards on site to ensure safe and orderly construction on site. The signature of the disclosure person is signed by the disclosure person. Note: This form is in duplicate, one copy is kept and the other copy is kept by the team.

IV. Hoisting safety of reinforcing cage:

1. The reinforcing cage must be made in strict accordance with the requirements of the drawings, and the reinforcing ribs of the reinforcing cage must be welded firmly and reliably, so as to ensure that it will not be damaged during the hoisting process, and only after passing the inspection by quality inspection engineers and supervision engineers can it enter the hoisting process.

2. Before hoisting the reinforcing cage, the handover inspection must be carried out. The person in charge, the foreman and the technician at the scene should organize the ZuoYeDui (or operator) for steel bar production and the ZuoYeDui (or operator) responsible for hoisting to carry out the handover inspection on the spot. The hoisting ZuoYeDui should strictly inspect the welding conditions of the reinforcing bars and lifting points of the reinforcing cage. After passing the inspection, both parties shall sign for confirmation. The quality and safety of the confirmed reinforcing cage shall be the responsibility of the lifting ZuoYeDui. It is strictly forbidden to lower the hole of the reinforcing cage without passing the inspection, such as the thickness of protective layer and other accessories that do not meet the technical requirements. Otherwise, the hoisting operation team (or operators) shall take full responsibility. 3. The crane must pass the local safety performance inspection, and the crane operator must hold relevant certificates.

4. Before hoisting, the safety of wire rope and spreader must be carefully checked, and the safety insurance factor must be greater than 3.5 times the hoisting weight. The wire rope must be replaced if it is knotted, stranded, broken, corroded and worn by more than 1%.

5. The selection of lifting points must be carried out in strict accordance with technical disclosure. If the technical disclosure is not clear, the lifting point should be selected on the main reinforcement within the top 1/3 of the single reinforced cage, and the free length of the reinforced cage above the lifting point should not exceed 3 meters.

6. Before the reinforcing cage is lowered into the hole, it must be tested by the hole detector to meet the technical requirements before it can be hoisted into the hole. The lower hole of the reinforcing cage shall be hoisted in sections, and the length of each section shall not exceed the effective hoisting height of the crane, and shall not exceed 15m.

7, due to hoisting, welding and other reasons, the collapsed hole reinforcement cage can't go down, and when it needs to be hoisted out for inspection or hole cleaning, it must be hoisted out after being cut off in sections.

8. When the crane is hoisted, no personnel can stay within the working radius.

5. On-site management:

1. In the process of pile foundation construction, on-site safety management personnel must intensify the investigation of potential safety hazards on site to ensure the safe and civilized construction on site.

2. The above-mentioned related measures must be strengthened in the construction process. If the above-mentioned safety problems appear many times in the construction process, and the rectification is not carried out or the rectification is not in place, the corresponding punishment measures will be given at the site.