In order to study the anti-collision performance of prefabricated bridge deck ancillary facilities of high-speed railway under different constraints,the design method of protective wall for prefabricated bridge deck ancillary facilities of high-speed railway was proposed,and three full-scale test models of protective wall for prefabricated bridge deck system were prepared.Two of them were supported by steel beam with four-point bolt and two-point bolt connection respectively,and the other was supported by bridge deck plate.The comparative analysis was carried out by static load experiment.The results show that during the four loading process with the maximum load of the derailment design load,the protective walls of the auxiliary facilities of the prefabricated bridge deck of the high-speed railway box girder are in a linear elastic working state,and the cracks mainly appear in the mortar layer interface and the inner protective wall surface of the line,which are horizontally distributed;continuous loading causes the protective wall structure to reach the limit state after the main cracks are obliquely penetrated;the ultimate bearing capacity of the three models reaches 2.12-2.59 times of the design load of derailment,which has enough redundancy of bearing capacity.The connection between the auxiliary facilities of the prefabricated bridge deck and the bridge deck structure is safe and reliable under different constraints.The full-scale model test verifies the correctness of the proposed method.
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