Abstract: Based on the full-scale indoor test about double FRPM pipes culvert and finite element theory, the finite element numerical model of three FRPM pipes culvert is established for numerical simulation. Through the analysis of multiple pipes culvert under different working conditions, the stress state and deformation characteristics of multiple pipes are explored, and the influence of the pipe spacing on the deformation of adjacent pipe is also discussed. Therefore, the most unfavorable pipe and its most unfavorable part about multiple pipes culvert under loading conditions is known. The soil compactness and the pipe spacing have a positive impact on the deformation of multiple pipes culvert, which provide the design basis and practical value for the selection about multiple pipes culvert in practical highway projects.

Key words: FRPM pipe, finite element, stress state, deformation characteristics, pipe spacing