Profile

The Bridge Girder Erection Machine is the equipment to put the prefabricated beams on the prefabricated piers. The bridge erecting machine belongs to the crane category, its main function is to lift the beam, and then put it down to the specified location.

The bridge erecting machine is very different from the crane in the general sense. The required conditions are harsh and need to be carried on the beam (length-way moving).

The bridge erecting machine is divided into the construction of highway bridge, the conventional railway bridge, the passenger special railway bridge and other kinds. The bridge erecting machine needs to be operated on the road and railway track which is used for bridge construction machinery. Because of its high efficiency for working, the standard design of railway bridge in China, the design principle of this equipment is taken into consideration much more then others. The size of bridge erecting machine is large and its beyond the limit of railway transportation. Therefore, it must be disintegrated and transported to the site and reassembled.

Sketch

Type of Bridge Girder Erection Machine

-Single beam bridge erecting machine

One of the bridge construction machinery, the hanger arm is a box girder, hanging forward, and there is a folding column at the front end of it (composed of left and right two feet). The machine can enter the bridge position by itself in the empty state, and then straighten the front column and support the pier in front of the bridge. When the erected beam (or whole beam) moves along the hanger arm, the crane arm is close to the state of the simple beam. When the bridge is setting, the machine can enter the bridge position by itself in the state of empty load, the beam with a special gantry crane from the railway flat car is transferred to the special beam car, then the girder transport vehicle and bridge machine back on. Two crane trolley running on the hanger arm of the bridge crane hoist the beams, go along the hanger arm to reach the bridge position and beam. In order to adapt to the curve bridge, the crane arm can make a small amount of swing in the horizontal plane. The advantages of the machine are: cancel the balance weight, no longer need the locomotive push, the feed beam does not need the bridge head switch, the degree of mechanization is improved, and the safety performance is improved.

-Double cantilever erecting machine

One of the bridge construction machines, which was used earlier in the Soviet Union. This type of bridge erecting machine can not be self-propelled, and needs to be pushed by the locomotive. The forearm is used to lift the beam, and the rear arm hanger is balanced, the front and rear arms can not swing in the horizontal plane. When bridging, it is often necessary to use a special 80 ton flatcar to carry the beam to the hoisting hook of the forearm of the bridge erection machine (called "feed beam") to lift the bridge. In order to make the shunting operation convenient, it is necessary to lay the branch line in the bridge head. When the girder is hoisted, the axle load increases, and the new embankment at the bridge head is soft; Therefore, the reinforcement measures must be taken for the crane girder of the bridge erecting machine, such as the heavy car press, the sleeper and so on.

-Double beam bridge erecting machine

The hoist arm of the double beam bridge erecting machine is made up of two box beams. The two beam runs through the fuselage and extends forward to the back end. And folding column consisting of two legs is arranged at both ends. There are two trusses spanning two box beams that can drive along the hanger's arm. The hoisting trolley are placed on the trussers and can drive along the trusses by transverse. The pending beam (or the whole beam) can be sent directly under the rear arm of the bridge erecting machine, when the crane is hoisted with hoisting trolley, it moves forward with the trussed car, and then moves across the tram car, falls to the beam. The front and rear end of this kind of bridge erecting machine can be hoisted beam and fall beam. There is no need to adjust the head when changing the direction of the beam. In order to adapt to the curve frame beam, the front and rear arms can be swung in the horizontal plane. There is no need to move the beam or the path, and the beam will be in place; the "feed beam" does not need a bridgehead or a special beam. After the girder laying, erecting machine can be continue forward operation. In addition to the above standing bridge erecting machine, the construction units sometimes make various temporary bridge erecting machines according to their needs.

Assembling