Special line for passenger trains 900 type bridge formation machine front launching nose anchor support technology
Technical field
The present technique invention belongs to high-speed railway Line for Passenger Transportation construction field, anchoring temporarily device when solving 900 tonnes of bridge formation machine via holes.
Background technology
During China Express Railway is being built fast now, in the construction of high-speed railway, adopt the mode of viaduct to solve the variety of issue that restricts circuit usually.In the process of building bridge,, have only by specialty bridge formation machine and construct owing to Line for Passenger Transportation precast concrete simple supported box beam volume big (beam length is 32.6m), tonnage heavy (single hole case beam quality reaches 900t).The bridge formation machine main body of using at present is divided into two parts: one is the girder part, main body when working for bridge formation frame beam; Two is the front launching nose part, for the bridge formation machine after successfully setting up a hole simple supported box beam, for crane ' s major girder reach provides support, thus the state that crane ' s major girder is reached work on.When crane ' s major girder via hole state, bridge formation machine front launching nose fixed-site need be caused unstability and causes serious accident with the machine complete machine reach that prevents to build bridge.In the construction be at present: in the Bridge Pier Construction of carrying out in advance that 8 fining twisted steels are buried in pier shaft by the mode of predetermined fixed in the anchoring scheme that adopts with the bridge formation machine.Such cost cost height because fining twisted steel is to adopt pre-buried mode to be fixed on the bridge pier, can not take out usefulness of turnover after simple supported box beam sets up, increased the input of material; Two reclaim difficulty, the material recovery that pier shaft can only be exposed in the removal process, and to adopt the mode of gas cutting, thus increased expenses of labour; Three have increased the difficulty of Bridge Pier Construction, build bridge pier concrete the time for the accuracy that guarantees the built-in fitting position has increased labour cost, because if can not guarantee that the position is accurate in the construction, then can have a strong impact on setting up of case beam.
Summary of the invention
The purpose of present technique invention is to overcome above-mentioned weak point, and a kind of simple in structure, dependable performance, easy to use, the bridge formation machine front launching nose anchor support that can have enough to meet the need use are provided.
For achieving the above object, the technical solution used in the present invention is: design and a kind of bridge formation machine of processing and fabricating front launching nose anchor support, replace pushing up at pier stud the way of pre-buried fining twisted steel.Anchor frame adopts i iron to be processed into the box girder steel, welding tie-strut clamping plate on the box girder steel, and according to Line for Passenger Transportation precast concrete simple supported box beam hole for hoist position reservation anchor hole.Utilize the bi-directional expansion screw mandrel that auxiliary nose girder before the bridge formation machine is connected with frame precast concrete simple supported box beam, can reach the fixedly effect of bridge formation machine supporting leg, thus safety and stability under the realization bridge formation machine via hole duty.The present technique beneficial effect of the invention is:
1, simple in structure, the job site makes easily, and cost is low, can utilize the building-site current material to process, and a cover anchor support expense amounts to and is no more than 5000 yuan.
2, dependable performance, the stability that front launching nose partly supports girder in the time of can satisfying 900t level bridge formation machine via hole.
3, easy to use, can utilize the existing bale handle dolly of bridge formation machine to carry out the carrying of anchor support, reduced labor strength, improved operating efficiency.
4, anchor frame can be reused, and has saved the material input.
5, shortened the cycle of setting a roof beam in place, adopted this technology can significantly reduce the bridge formation machine via hole needed time of operating mode, the cycle of setting up of every hole simple supported box beam can shorten 40~60 minutes.
Description of drawings
Fig. 1 is the positive facade of anchor support;
Fig. 2 is the anchor support vertical view;
Fig. 3 is the anchor support left view;
Fig. 4 is the anchoring pin rod;
Duty when Fig. 5 is the work of bridge formation machine employing present technique invention anchor support;
Fig. 6 is that the bridge formation machine adopts former design anchoring scheme duty.
The specific embodiment
Bridge formation machine front launching nose anchor support adopts the butt welding of 200mm type i iron to be processed into box girder steel integral body, 8 anchoring rod straps with the processing of 20mm steel plate of welding on it.Be be connected with the frame Line for Passenger Transportation precast concrete simple supported box beam anchoring screw mandrel of usefulness of anchor support, during use the anchoring screw mandrel is passed the preformed hole of anchor frame and the hole for hoist of Line for Passenger Transportation precast concrete simple supported box beam, utilize bolt that anchor support and Line for Passenger Transportation precast concrete simple supported box beam are locked together.Rear end face at bridge formation machine front launching nose welds the leading screw strap simultaneously, and makes it corresponding with strap position on the anchor support.In the enforcement, utilize the bi-directional expansion leading screw that to have bought on the market that the strap on the bridge formation machine front launching nose is connected with anchor support.
The present technique invention has been verified its service behaviour through the practical application of Zheng Xi Line for Passenger Transportation high-speed railway JQ900 type bridge formation machine.The stability and the safety of the work of bridge formation machine have been improved.An anchoring temporarily difficult problem had been saved engineering cost greatly when this anchor support had successfully solved bridge formation machine front launching nose via hole, made simply, was applicable to the bridge formation machine of similar model, and employing is worthy to be popularized.