these safety knowledge are not well done, so it's strange that accidents don't happen. Here, Zhongda Consulting brings you an introduction of safety knowledge for your reference.

1, tower crane fence

1) add fences and locks around the tower crane to prevent irrelevant personnel from entering;

2) Tower cranes and other equipment can only be used after passing the safety inspection and filing;

3) there must be no water in the foundation pit of tower crane;

4) The distribution box and tower body of tower crane shall be repeatedly grounded;

5) Equipment such as tower crane should be inspected and maintained regularly.

2. Protection of openings and borders (1)

1) All openings with a diameter greater than 5px and "five borders" need to be protected;

2) cover with hard material;

3) Large openings and edges need to be protected by steel railings;

4) The protective facilities should be warned with two-color paint.

3, the mouth of the cave, limb protection (2)

1) the strength of protective materials meets the requirements;

2) the protection height meets the requirements (≮ 1.5m);

3) set a footboard;

4) A safety net should be hung above the enclosure of the elevator shaft to prevent the objects above the shaft from popping up after falling and hurting people.

4, distribution box

1) TN-S system should be adopted for construction electricity, three-phase four-wire system (five-core cable);

2) the construction power consumption shall conform to "three-level distribution and two-level protection";

3) The distribution box shall be equipped with power disconnectors (obviously visible breakpoints) and short circuit, overload and leakage protectors, which shall generally not be greater than 3mA and .1s；;

4) When necessary, the distribution box shall be repeatedly grounded;

5) Each equipment must have a special switch box (one machine, one brake and one protection);

6) safe voltage should be used in special places.

5. People-goods elevator

1) People-goods elevator should have factory certificate, installation and disassembly plan, which should be installed by qualified units and personnel, and used after passing security inspection and filing;

2) People and goods elevators should be used within the security inspection period, and they must be re-examined after the expiration;

3) The safety protection devices (anti-falling devices, limit switches, alarm facilities, etc.) of people and goods elevators should be used within the qualified period, and must be re-examined after expiration;

4) The free end at the top of the people-goods elevator and the material hoist shall not be less than 6m.

6. Movable scaffold

1) The chassis of movable scaffold is enlarged to increase the overturning resistance;

2) All four wheels have brakes;

3) add a fence at the top for protection.

7. High formwork protection

1) For tall formwork (height over 8m or span over 18m) projects, a special construction scheme should be specially prepared, and an expert group should be organized for demonstration and review;

2) The high formwork can be protected by adding a horizontal partition;

3) The high formwork must be checked and accepted before it can be put into use.

8. Unloading platform

1) Try to use an integral unloading platform;

2) There should be a calculation sheet for the steel beam and wire rope of the unloading platform;

3) The periphery of the unloading platform should be fenced;

4) The unloading platform shall not be overloaded. When calculating, the margin should be enlarged appropriately to increase the safety factor.

9. Safe passage

1) There must be a safe passage when entering the construction work area to ensure the safety of personnel entering and leaving;

2) Double-layer protective shed should be used for safe passage;

3) The door opening of the passage should be strengthened.

1. Material hoist

1) Material hoist shall have factory certificate and erection and demolition scheme;

2) The work shall be installed by qualified units and workers, and used after passing the security inspection and filing;

3) The safety devices of the hoist shall be complete (anti-falling safety device, automatic interlock, etc.);

4) hoist shall not be manned;

5) The floor feed inlet shall be provided with protective doors and protective railings;

6) The operator should make the whole operation process of the material hoist visible, otherwise, a camera should be installed.

11. Protection within the operating radius of tower crane

1) It is generally not appropriate to set up a processing zone within the operating radius of tower crane;

2) If there is a processing zone, it must be protected (protective shed on the second floor).

12, typhoon prevention and reinforcement

1) Pay attention to safety and hygiene during the construction, and have fire fighting equipment;

2) temporary houses should be strengthened against typhoon;

3) If the temporary house is within the working radius of tower crane, a protective shed shall be erected on the roof.

13. Curtain wall welding operation

1) Curtain wall welding operation needs to apply for a hot certificate in advance and be approved by the general contractor;

2) Fire control measures should be complete during curtain wall welding operation, such as using fire bucket, equipped with fire extinguishing equipment, setting up firewatch, and patrolling for half an hour after welding.

3) If the distance between the curtain wall scaffold (curtain wall steel frame) and the building exceeds 75px, a horizontal pocket net should be set.

14, deep foundation pit operation

1) Deep foundation pit support construction and excavation construction should have a special special construction plan, and deep foundation pits over 5m should be reviewed by the expert group;

2) Deep foundation pit operations should be carried out by qualified units;

3) Effective foundation pit monitoring should be carried out during deep foundation pit operation; and the civil engineering unit should have entered the site when digging.

4) The supervisor should strengthen the inspection and patrol of the operation process of deep foundation pit, and convene an expert group discussion in time when problems are found.

15. On-site safety and civilized management

1) The "seven cards and one map" shall be arranged on site neatly and conspicuously;

2) There are signs of major hazard sources, safety bulletin boards and other facilities on site;

3) The main construction roads should be hardened, and there is a washing table;

4) measures should be taken to prevent dust;

5) noise reduction and noise isolation measures should be taken to avoid disturbing people;

6) The dormitory, canteen and toilet meet the hygiene requirements;

7) Materials and articles shall be neatly stacked.

16. Scaffolding

Before construction, the supporting scaffold and formwork of post-cast strip should be dismantled after the construction of post-cast strip is completed and the demolition conditions are met. Scaffolding and formwork should be considered together with the whole scaffold and should be independent at the same time, so as to facilitate the demolition.

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