What is the preparation work for installing the launching gantry crane?
The launching gantry crane? is of heavy bridge construction equipment, to ensure its normal work, it is necessary to operate the machine in accordance with operation instruction manual and current related rules.
launching gantry crane
? Install the bridge girder launcher
Personnel and equipment
a. personnel: 8-10
As a large-sized special equipment for constructing a bridge, only with clear, definite division of labor and uniform command, only with full-time operator, full-time electrician, full-time safety inspector, the bridge girder launcher can work normally. To ensure construction safety, there must have strict construction organization and measures. The basic personnel conditions are as follows:
One commander: be acquainted with bridge structure and basic requirement of hoisting work. Firstly learn more about bridge structure, assembly program, operating method and instruction manual, then he must have certain organization ability, be familiar with command signal and have a strong sense of responsibility
One electrician: could read the circuit diagram of bridge girder launcher and connect the wire according to drawing, be capable of rapidly clearing trouble in work. The one with strong responsibility, skilled operation experience, quick response can handle and be in charge of operating the machine.
One hydraulic worker: know well basic knowledge of hydraulic system and master skills of use and maintenance, be capable of correct operation and trouble-shooting.
Two lifting workers: have lifting work experience many years, with strong sense of responsibility and certain mechanics knowledge, be familiar with operating regulation and safety code of lifting worker, be responsible and serious
Six helpers:? have certain knowledge, strong, can bear hard work and be keen to learn professional knowledge.
launching gantry crane
b. Equipment:??
crane with lifting capacity > 20t?? 1 set
?19.5 steel wire rope 8m?????????? 4 ropes
Sleeper???????????????????????????? some sleepers
Electric welder????????????????????? 1 set
Oxygen, acetylene???????????????????? 1 set
Steel hammer (12 pounds, 8 pounds)???? 1 piece for each
Wrench, pincher???? ????????????????????several pieces
Gradienter???????????????????????????? 1 set
B. Measuring, positioning and field engineering:
Usually, the bridge girder launcher is installed on roadbed at bridgehead. The assembly site requires certain working surface, the min size of worksite is 95m?10m, the roadbed should have enough bearing capacity to satisfy the demands of installing bridge girder launcher and carrying girders: the site can has a longitudinal gradient but should be smooth and flat, the longitudinal gradient should less than 3%; measure the position of operation centre line of the bridge girder launcher, front support leg, middle support leg and rear support leg.
