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| Calculation of Movable Die Carrier and Determination of Pre-camber of Bridge of High-speed Railway |
| WU Shang-de |
| The Engineering Supervision Co. Ltd, China Railway First Survey and Design Institute Group Ltd, Xi'an, Shanxi 730000, China |
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Abstract Research purposes: The bridges in the special sections of the Shenyang-Dandong Passenger Dedicated Line needed to be built by using the bridging machine with movable die carrier because of the natural environment conditions. The calculation was made to verify the design and manufacturing qualities of the MZ900S type Bridging machine with upstriker movable die carrier, know the actual deflection and stiffness of the bridging machine under the various working states during construction of cast-in-situ box girder and determine the reasonable pre-camber according to the y=0.1213x2-30.1 for the purpose of ensuring the bridging machine in the good working state in service.
Research conclusions: (1) The calculation and heaped loading test showed the strength，stiffness, manufacturing quality and assembly quality of the movable die carrier met the design requirements and the pre-camber was reasonable according to the y=0.1213x2-30.1. (2) The movable die carrier had the features of the clear loading on the structure, good adaptability, perfect functions and high mechanization. (3) The movable die carrier met the construction requirements for the 24 m box girder, the curve bridge, the bidirectional 32m box girder with assembly of integrated 32 m bridge opening.
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Received: 02 October 2012
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2013, Vol. 30 
