Straddle type monorail PC track girder construction method inside circular cross section tunnel

Abstract

The invention discloses a straddle type monorail PC track girder construction method inside a circular cross section tunnel. The method comprises the following steps of providing a girder erection machine and a girder transporting vehicle capable of walking on the hook face; a PC track girder is fixedly installed on the girder transporting vehicle, and the girder erection machine is put in place;the girder transporting vehicle transports the PC track girder into the girder erection machine; a transverse clamping device of the girder erection machine is started, the PC track girder is lifted,and the girder transporting vehicle exits from the circular cross section tunnel; the girder erection machine erects the PC track girder according to a design construction drawing, the girder transporting vehicle is returned to transport a next PC track girder; after erection of the girder erection machine is completed, the next PC track girder is erected when the girder erection machine is put inplace forwards. The method has the advantages that walking devices of an existing girder erection machine and a girder transporting vehicle are modified, the modified girder transporting vehicle andthe girder erection machine achieve erection of the straddle type monorail PC track girder inside the circular cross section tunnel, the construction cost is low, operation and transition are flexible, cross operation can be performed, construction organizations are flexible, and the construction efficiency is high.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a construction method for a straddle-type monorail PC track beam in a tunnel with a circular section. Background technique [0002] Straddle-type monorail refers to a railway that is supported, stabilized and guided by a single track, and the car body rides on the track beam. The straddle-type monorail is a three-dimensional traffic (viaduct + tunnel), has an independent right of way, and is not interfered by other vehicles and pedestrians on the ground. It has the advantages of low construction period and cost, moderate transportation volume, low noise, and less land occupation. , will have great development potential in the future urban construction and development. [0003] The straddle-type monorail track beams mostly use prestressed concrete track beams (referred to as PC track beams) except for individual steel beams with large spans. In the existing constructi...

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Problems solved by technology

[0004] However, the above two construction methods of the monorail PC track in the tunnel section have defects: when the track-type gantry method is used, the installation and removal of the track consumes a lot of manpower and material costs, and it is necessary to drill holes on the tunnel wall to install the track abutment. On the one hand, it damages the tunnel structure and causes quality problems. On the other hand, adding a process greatly increases the interference between various processes, thus affecting the construction efficiency. Although the second method does not need to lay tracks, it is only suitable for tunnels with a bottom surface of plane, for tunnels with circular cross-sections, beam erecting machines and beam transport vehicles cannot walk on the arc surface

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