Large-tonnage beam erection and transportation system in tunnel and beam erection span change procedure thereof

Abstract

The invention discloses a large-tonnage beam erection and transportation system in a tunnel and a beam erection span change procedure thereof, is used for transporting and erecting large prefabricated box beams in high-speed railway and passenger railway lines, and in particular, is suitable for transporting and erecting the box beams in the tunnel. A bridge erection machine comprises main beams, wherein back support legs are arranged at the bottoms of the back ends of the main beams; a downwards recessed front lifting trolley and a back lifting trolley are driven through driving devices by fixed roller chains, are rolled to walk by sliding devices, and are stridden over double main beams; extensible middle support legs are arranged at the bottoms of the middles of the main beams; front support legs capable of moving and extending are arranged at the bottoms of the front ends of the main beams; a beam transporting vehicle comprises a vehicle body; and extension legs, a movable beam support trolley, at least two sets of oil cylinder support legs in the beam support place, multiple wheel sets and front anchor pull rods mounted at the front ends are arranged above the tail end of the vehicle body. The system can satisfy the erection of multiple specifications of passenger railway lines, satisfies the beam erection conditions in tunnel entrances and exits and in the tunnel, simplifies the beam erection procedures, improves the equipment stability, is high in construction efficiency and reasonable and innovative in structural design, and improves the construction efficiency.

Description

technical field [0001] The invention relates to the technical field of railway construction machinery and equipment, in particular to a large-tonnage girder erection frame in a tunnel that is used for the transportation and erection of large prefabricated box girders on high-speed railways or passenger dedicated lines, and is especially suitable for the transportation and erection of box girders in tunnels. The system and its girder spanning process. Background technique [0002] With the continuous deepening of railway construction, there are a large number of bridge-tunnel connection problems, especially in mountainous areas. At the same time, the tunnel may span the karst cave section, and box girders need to be erected in the tunnel. Most of the existing bridge erecting machines are only suitable for erecting girders in plain areas. At most, beam transport vehicles can directly carry bridge erecting machines or box girders through tunnels. It is difficult to cooperate wi...

AI Technical Summary

Problems solved by technology

Most of the existing bridge erecting machines are only suitable for erecting girders in plain areas. At most, beam transport vehicles can directly carry bridge erecting machines or box girders through tunnels. It is difficult to cooperate with bridge erecting machines to realize the erection of box girders in tunnels. Import and export beams are very difficult

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