Title: DATASET of the paper “Influence of the backfill parameters in distinct element modelling of a backfill masonry arch bridge through the PFC2D software”. Geomechanics and Geoengineering, https://doi.org/10.1080/17486025.2019.1680883. Authorship: Felipe García Gómez, José Antonio Martínez Martínez and Luis María García Castillo Keywords: Discrete element method; backfill masonry bridge; PFC2D; geomechanical modelling; soil-structure interaction. Abstract: The paper presents an investigation on how to model a backfill masonry arch bridge using the discrete element method (DEM). The PFC2D software is used for this purpose. A certain backfill masonry arch bridge is modelled, with different types of fill, mortar and voussoir materials. A biaxial test has been programmed using ‘FISH’ code to obtain the micro-parameters used in the model so that they match the macro-parameters obtained from a real biaxial test. The arch is loaded until its collapse in three different load cases. Further discussion on the influence of the backfill parameters is presented as well as a sensitivity analysis for the arch bridge. Date of data publication on the University of Burgos repository website: 2025 Financing: This work has not received any external funding. Related Journal: The related article is published in the journal “Geomechanics and Geoengineering” Licence to use materials (Creative Commons Licence): CC BY-NC In the attached files, the basic structure of the codes created and used for the research work on which the article is based is included. In the case of the biaxial test, and given that it is the code that can be used in all future DEM tests for the calculation of the microproperties of soils/fills, the complete code is attached. Files: - Codigo DEM Ejemplo 01.txt - Codigo DEM Ejemplo Puente de fabrica.txt - Codigo DEM Ensayo biaxial.txt - Codigo DEM Karst.txt