Views:3 Author:hengyuancrane Publish Time: 13-12-2019 Origin:Site
Process uses bridge girder erecting launcher crane in what will emerge?
Environmental temperature is also an important factor. Pre-camber construction bridge construction machinery should be controlled in accordance with the design requirements. Longitudinal running bridge and balance the desired height level of the top sides of the rail track.
1. Middle and hind legs level required level to run, and strictly control the spacing. Four tracks should be parallel.
2. Irrational use of overload upgrade the greatest impact on the deformation of the main girder air cutting maintenance on the bridge
3. Improper and poor weld can cause the girder highly skewed. Special attention replacement trolley track.
4. The influence of the internal stress structure as welded box girder structure, the welding process results in local heating and reproduction metal shrinkage, residual force, and the manufacturing process is also unsuitable a large internal stress, if any, the web is not cut to the main beam arcuate requirements. Crown main beam is deformed by heat or flame welding process by controlling the assembly obtained.
Note the use of overhead cranes:
1. For each member and the member, each chain comprising a chain shall be detailed inspection chain hoist bridge above the machine, and in good condition. Precautions
2. Electric hoist bridge crane is not overloaded during use.
3. Chain hoist is suspended vertically lifting heavy chain needs. Certainly not wrong button between the chain links.
4. When pulling the chain hoist bracelet, the bracelet to be the direction of the slide fastener chain wheel in the same plane.
5. Non-pull cable, buy cranes, bridge machine manufacturer specializing in the production.
6. Pull, must force the beam machine to avoid jump chain or chain. When they find difficult to pull, must be checked in time reasons, and does not allow dead lift, and does not allow increasing the force to avoid breaking the chain or pin. Bridge crane chain hoist
7. When using a tripod, the triangle must be kept relative spacing, the cord is applied to the contact between the feet. When rope touches the ground, it should be taken to avoid mixing bridge workers.
8. Lifting height should not exceed the standard value, in order to prevent the chain breakage and cause an accident.
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