Wind resistance measures for overhead launching gantry
Wind resistance measures for overhead launching gantry
Reliable and effective wind resistance meansures have to be taken to ensure a safe operation of overhead launching gantry, especially in the weather with huge wind and in the place with frequent wind weather.
How many anchoring points do we have for launching gantry?
Anchoring is in order to safe use of launching gantry, and we must pay more attention. Anchoring and wind resistance measures supplement and coordinate with each other.
Newly developed wet type concrete spraying system by ZZHZ
Wet type concrete spraying system is newly developed tunnel equipment these two years. They have been totally put in market after two years’ testing and modification.
What are crossing spans steps for walking type launching girder?
What you have to know about walking type launching girder?
Walking type launching girder made by ZZHZ is of honeycomb girder structure, which can greatly reduce wind impact on the main girder and improve stability and safety of the complete machine.
HZQ40/180 overhead launching gantry main technical parameters
HZQ40/180 overhead launching gantry is used in highway bridge project, the bridge range it can construct:
- span ≤ 40m
- pre-cast girder weight ≤ 180t
HZQY launching gantry for carrying and erecting girders
HZQY launching gantry for carrying and erecting girders made by ZZHZ was transferred to another worksite.
HZQY launching gantry for carrying and erecting pre-cast girders made by ZZHZ had transferred to another worksite smoothly a few days ago after distinguishing itself in Yungui Railway.
What is segmental balanced cantilever method?
Segmental balanced cantilever method means erection of pre-cast girder segments outward from fixed pier to alternate sides. And the following segments are connected with each other by coating epoxy and temporary pre-stressing. Finally, cantilever tendons are installed and stressed from one segment to its counter-part on the other side of the pier.
What is incremental launching method?
The basic idea of the incremental launching method is to prefabricate bridge girder segments behind an abutment and to launch the increasing bridge span by longitudinal hydraulic jack and make it slide on bearings into the final position without the aid of scaffolding.
How to avoid beam launcher aacidents?
Beam launcher is of large special equipment whose accidents will directly bring life and property loss.
Combing production and construction principle of beam launcher, learning lessons from the previous accidents, below items shall be strictly followed to avoid accidents:
