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| Mfects of the Interaction between Beam and Rail on Terminal Spine Setting on Short Subgrade Section behind the Abutment |
| MEI Da - peng1，MA Xu - feng2，CHEN Rong3，HU Chen - yang3，WANG Ping3 |
| (1. Southwest Jiaotong University， Chengdu， Sichuan 610031， China; 2. China Railway Wuhan Survey and Design Co. Ltd， Wuhan， Hubei 430074，China; 3. Key Laboratory of High - speed Railway Engineering， Ministry of Education，Southwest Jiaotong University，Chengdu，Sichuan 610031，China) |
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Abstract Abstract ：Research purposes： The terminal spine behind abutment is used as the limit structure of tlie track structure， which is an important part of CRTS ! slab track. The rail - slab - bridge - terminal spine - subgrade integration finite model is established to research the influence of longitudinal mechanical behavior between beam and ballastless track on the force and deformation of tlie terminal spine on the short subgrade section，optimize the setting of the terminal spine on the short subgrade section，and put forward a project of foundation plate being laid continuously on the short subgrade， setting T - shaped terminal spine in the middle of foundation plate and using AB group filling material filling the terminal spine. Research conclusions:(1) When foundation plate is laid continuously on the short subgrade，the short subgrade length has little effect on the force and deformation of track structure and terminal sj)ine under temperature force，and the forces of trie terminal sj)ine and friction plate are very small. (2) By the comparison of tliree kinds of trie terminal spine setting project, when foundation plate is laid continuously and sets terminal spine, rail longitudinal force and displacement on the right side of continuous beam change more smoothly，and the longitudinal displacement is reduced by 22；. (3) Put forward the foundation plate being laid continuously and setting inverted T - shaped terminal spine， but using more economical AB Group filling material. The checking results show that t!ie forces of t!ie terminal spine and friction plate are small under temperature force and can meet the requirements of engineering application. (4) The relevant research results are helj^ful to the design of CRTS ! slab track.
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Received: 03 June 2016
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2016, Vol. 33 
