Effective drainage system shall be set for foundation pit construction; 5.
（2） Erection of derrick and gantry 1.
The installation and disassembly personnel of each tower crane are fully equipped (including driver, rigger, electrician, welder, etc.), and the operators must work with certificates; 2.
（3） Key points for supervision and monitoring of tower crane 1.
The frame shall be equipped with lightning protection device.
The distance between poles (24m high scaffold) shall not be greater than 1.8m, and the horizontal height shall not be greater than 2m; 6.
The winch shall be firmly fixed and the rope drum safety device shall be effective; 3.
Set reliable protective measures for reserved openings and pits; 6.
The upper and lower foundation pits must be provided with climbing measures; 7.
The installation and disassembly personnel of each construction elevator are fully equipped (including drivers, riggers, electricians, welders, etc.), and the operators must work with certificates; 2.
The first wall attachment device shall not exceed 7m, and the height of the handle rod shall not exceed the top of the derrick; 11.
Foundation pit construction shall be carried out in accordance with the requirements of construction organization design or special construction scheme; 2.
Shear bracing shall be set every 9 meters; The included angle is 45 ~ 60 degrees; 5.
It can only be used after being tested by the testing institution recognized by the Municipal Construction Commission and issued a certificate of conformity; 3.
The track laying of the pile driving machine shall comply with the provisions of the factory manual; 5.
The maximum deformation and daily deformation of the foundation pit shall not exceed the specified limit; 4.
The mobilized construction machinery has passed the acceptance, the driver works with certificate, and the warning line is set in the operation area.
5、 Key points for supervision and monitoring of scaffold erection 1.
The frame body shall be vertical, firmly connected and covered with a small eye safety net; 7.
It can only be used after being tested by the testing institution recognized by the Municipal Construction Commission and issued a certificate of conformity; 3.
The staffing of tower crane includes 1 ~ 2 commanding personnel except the driver; 4.
The torque limiter is sensitive and reliable; The luffing limiter is sensitive and reliable, and the ultra-high limiter is sensitive and reliable; Hook safety is sensitive and reliable; The drum safety is sensitive and reliable.
（4） Key points for supervision and monitoring of construction elevators 1.
Construction personnel must wear safety helmets correctly when entering the site; 2.
The electric box shall be uniformly numbered and placed at a height higher than 60cm; 6.
Protective sheds shall be set at the entrance of the passage, and double protective sheds shall be set at the height of the construction layer exceeding 24m; 7.
The ultra-high limit device of pile driver meets the requirements, and there is no high-voltage line within 5m of the operation area; 3.
The pit side load, soil stacking and the distance between mechanical equipment and the pit side meet the requirements specified in the scheme; 6.
The scaffold shall be provided with a climbing ramp; Passageway protective shed shall be set at the entrance and exit; 8.
The pole foundation shall have a drainage system; 2.
The stair mouth shall be equipped with edge handrails, the elevator wellhead shall be equipped with protective doors, and a horizontal net shall be set every 10m in the elevator shaft; 5.
Communication devices must be set between the cab and each floor..
The hoisting steel wire rope shall be well lubricated, and there shall be no broken wire exceeding the standard; 4.
The power switch box shall have one machine, one switch, one leakage and one box; 7.
on the stamp Oh I.
3、 Key points for supervision and monitoring of construction power consumption 1.
One group of wind rope shall be set at 20m, and one group shall be added every 10m; 4.
Set a layer of isolation fence every four steps; 7.
The electrical machinery power wiring and control system shall be in reliable contact, and the connecting cable shall be free from damage.
Whether the electrical equipment and mechanical equipment have reliable grounding devices; 8.
The steel wire on the rope drum of the transmission system shall not be less than three turns; 8.
Double layer anti falling sheds shall be set up on three sides around the elevator; 5.
Two.
For formwork erection at a height of more than 2m in the working environment, the operators shall have a reliable foothold and complete protective facilities.
The number of floors shall be marked on the floor, and the up-down contact shall be controlled by the signal device; 10.
The floor unloading platform shall be protected reliably and laid tightly; 6.
key points of foundation pit construction supervision and monitoring 1.
The distance between every two poles in the horizontal direction of the pull node between the frame and the building is less than 3.6m, and a pull support point is set every 3.6m in the vertical direction; 3.
6、 Key points for supervision and monitoring of construction machines and tools (I) pile driver construction 1.
High voltage line protection shall be set up according to the scheme; 3.
forty-eight × 3.5mm, no crack, etc; 2.
Protective fence shall be set around the bottom of the cage; 4.
The power transformation and distribution device meets the specification requirements; The power supply adopts three-phase five wire system, and the distribution room is equipped with warning signs, fire extinguishers, insulating blankets, insulating gloves, etc.
Protective railings and safety nets shall be set above the second step; 4.
The pit wall support shall be implemented according to the scheme, and the environmental monitoring of the foundation pit shall be implemented as required.
The attention of Henan Yunrui Engineering Consulting Co., Ltd.
The erection height of branch line shall ensure that the height of cable line is greater than 2.5m and the height of overhead line is greater than 4m; 4.
If the height of the hanging basket exceeds 30m, a double-layer protective shed shall be set up; 9.
The layout of temporary power consumption site conforms to the power consumption plan of construction organization design; 2.
Construction in progress shall be closed with qualified safety net; 3.
The broken wire of steel wire rope shall not exceed the standard, the ground shall not be supported, and protection shall be set when crossing the road; 5.
The supervision and control points of formwork support system 1, the material of steel pipe support is in conformity with the regulations, and the outer diameter should not be less than that.
Safety belt must be worn when working at heights above 2m; 4.
Protective grounding and lightning protection grounding shall be set at the four corners of steel pipe scaffold.
The edge of the foundation pit with a depth of more than 2m shall be provided with protection; 3.
The erection height of on-site lighting is greater than 2.4m, and safe voltage should be used in dangerous places; 5.
The license for pile driving machinery is complete and effective; 2.
Reliable protective railings must be set at the edges of balconies and roofs.
Column stability, including support height, horizontal support between columns, vertical and horizontal cross bridging spacing, and vertical pole spacing (longitudinal and transverse) meet the requirements of the scheme; 3.
The crane tray is ultra-high limit and the docking device is sensitive and reliable; 2.
The hanging tray is equipped with safety door and two side baffles, which are firm.
4、 Key points of “three treasures” and “four openings” protection supervision 1.
