The main vertical pole is like a dummy frame with a height of 50 meters.
The bearing bar at the bottom of the beam floats on the fastener and the other bearing bar at the bottom of the beam floats on the steel pipe, The stability of the formwork support is not stable.
What are the main contents of daily inspection and pre use inspection of tower crane ().
connecting bolts at main parts C.
The upright pole of the formwork support in the staircase spans one and a half floors, There is no horizontal bar and sweeping bar formwork support.
Replace the cable with sheathed wire; 3.
IV.
The opening of the material lifting frame of the material hoist is not provided with an octagonal support.
the unloading platform is laid tightly; e Can one of the safety rope and stress rope of the unloading platform be used? Correct answer BCD – click to view the answer – note: the above content is authorized by Anhui Zhongpei genuine, and is prohibited without permission.
PE protection zero line is not connected to the equipment shell, and the cable is dragged to the ground and passes through the scaffold.
When the fire hydrant on the site of the fire prevention facilities is used, The scaffold steel pipe replaces the DN100 fire main pipe, and the DN100 fire main pipe replaces the water supply main pipe with the scaffold steel pipe.
The standard reverse pulling steel wire rope method is standard reverse pulling steel wire rope method.
The bottom vertical pole is bent by the backfill, and the scaffold outside the pole is not set in the middle of the span of nearly 4 meters.
The unloading platform shall meet the following requirements ().
The backfill of the foundation pit will squeeze and bend the scaffold vertical pole, and the foundation at the bottom of the frame is not hardened.
No protective shed is set at the entrance of the passage.
The vertical bar is loaded with steel pipes with joints at the reserved openings.
The power box and the lighting box are mixed; 2.
5.
The cover is incomplete.
2.
The temporary power box is seriously polluted, the cover is incomplete, and the wires of one switch and multiple machines are connected and pulled randomly.
metal structure and appearance structure D.
The contact point between the steel wire rope and the concrete is not provided with an isolation pad.
The upright pole of the scaffold is shaky.
They are tied to one embedded ring and the embedded ring is left too long, The contact point between the steel wire rope and the concrete is not provided with an isolation pad.
The inner and outer two steel wire ropes are pulled back by the unloading platform.
The bearing rod at the bottom of the beam floats on the fastener, causing the frame body to be unstable.
The eight tower crane trolley rope breaking protection device fails.
The unloading platform of the tower crane is used to pull back the inner and outer two steel wire ropes and tie them to one embedded ring and the embedded ring is too long.
The standard section sleeve is cracked at the weld seam.
A.
The unloading platform can be put into use only after design and calculation; B.
The construction scheme for setting up the unloading platform is formulated, and the scheme approval meets the procedure requirements; D.
A.
Foundation pit B.
The bottom pole is connected in a virtual manner.
Title 1.
tension C.
safety device E Distribution box and power switch? Correct answer BCDE – click to view the answer – 3.
The artificial short-circuit height limit is damaged.
the unloading platform can be put into use only after receiving the experience; C.
The top plate of the basement spans the foundation pit.
The construction site is muddy and chaotic.
The square timber of the unloading platform is not fixed without laying plates.
The standard section bolt loosens the dynamic moment limit.
The stair formwork support is made of steel and wood, and there is no horizontal bar and sweeping bar.
The upright pole is the main component of the scaffold, mainly bearing (), and is also a bending member, which is the pillar of the scaffold structure.
The lattice column under the tower crane platform is more than 4 meters high.
3.
The distance between the upright rods of the formwork support does not consider the weight of the beam and is arranged with the spacing of the plate.
The double pole is padded with cement bricks with a height of 50m.
The formwork support is supported by the external scaffold and connected with the external scaffold.
The cable is erected on the external scaffold, and sundries are stacked in the general distribution room.
The cross bracing is not allowed to fall.
Formwork support.
6.
shear D Centrifugal force? Correct answer a – click to view answer-2.
There is no sweeping pole and no double vertical pole, The scissors support does not fall to the ground.
A.
1.
It is not excavated with the earth.
The sedimentation tank is too small The mixer hopper hook of the mixer is replaced by a steel pipe with a diameter of 8.
Pressure B.
The operators of the single vertical pole outside the frame at the bottom of the upper double vertical pole work in the air without laying bamboo fences and wearing safety belts.
It is welded in time to support the tower crane.
The load-bearing strength and stability of the scaffold can not guarantee the anchorage length of the cantilever beam at the internal corner of the cantilever frame is seriously insufficient, and the cantilever beam anchorage wedge is not set in two directions, The two sides are not plugged with wooden wedges.
II.
1、 The inner pole of the scaffold outside the scaffold is suspended on the top surface of the lighting shaft with a height of 50m.
The double pole at the bottom is supported by only one rusted steel pipe and is not firmly supported.
cantilever scaffold: the internal corner of the cantilever scaffold has a cantilever length of more than 5 meters, and no top support is set and no steel wire rope is pulled.
The pole at the bottom of the scaffold with a height of 50m is directly placed on the balcony plate, No corresponding top support is set at the bottom.
There is no protective railing at the edge of the basement roof.
The skylight of the lifting cage of the material hoist is opened without laying wood plates.
1.
