900T Wheel-type Girder Hoister Structural Optimization Design

900t wheel-type girder hoister researched on design, manufacture,test method and operation of the product in the paper is a great piece ofequipment that has been developed for express railway construction. Itskey function is to hoist, haul Pre-stressed Concrete box girdercharacterized by the size of20m,24m,32m, and the type of double-trackhole in high-speed, the speed of200km/h-350km/h, rail passenger lineThis equipment can complete to hoist, hand and load the box girderwith the transporting girder vehicle inside the precast beam field, whichhas the feature of maximum lifting-height, maximum lifting-weight,operating flexibility, high efficiency.Beam can be taken, shifted and fallen in any pedestal. Walkingsystem can be rotated90degrees to install other parts. Requirement ofworking ground is low. Therefore the equipment is applied to construct inthe long and narrow beam field and other specifically environmentalconditions.The machine is composed of walking systems, rack systems, liftingsystems, hydraulic system, electric control system, security system, etc.The complete machine, whose listing height meets the one and twooff, four point lifting, three point balance, is adopted the technology ofentire hydraulic control and multi-pump confluence with a variety of walking pattern.The purpose of the paper is to establish organization model, simulateworking condition by the analytical software, and optimize the structuredesign.