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| Research and Application of CRTS I Slab - replacing on Bridge |
| WANGTao, SHAOPi - yan，LI Hai - yan，LIUZi - ke |
| (Metals and Chemistry Research Institute，China Academy of Railway Sciences，Beijing 100081，China) |
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Abstract Research purposes ： Under the comprehensive function of thermal stress， vehicle dynamic load and weathering，diseases of individual CRTS I slab appear such as cracked，chip off— falling，then it is possible to replace new one in the future. Combining with the new railway without operations in which damaged slab must to be replaced， the process of replacing CRTS I slab was studied in this article，and the results can provide reference for slab baiastless track maintenance in our country. Research conclusions ：( 1 ) The construction plan of rail - lift replacing slab was applied which depended on simple equipment，and overcame some special difficulties，such as track crane unfeasible scheduling，temporary - convenience road ended nearby bridge，to avoid breaking seamless rails. (2) The key steps： freed rail fastening and lift rail firstly， laterally pulled slab away by roller，the slab was raised in middle place between double - track railway，moved to hoisting location by flat car，and truck crane lifted the slab of the car from the space between double overhead contact system，also，the new slab was repositioned by reverse operating，then，it was the first successful to accomplish slab - replacing. (3) A method for using special equipment and rapid - hardened mortar is proposed，which will greatly reduce construction time，and the process of slab - replacing can be finished during maintenance gap in the future.
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Received: 13 November 2015
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2016, Vol. 33 
