Abstract：To address the structural instability issue of corrugated steel pipe culverts in open-pit mines caused by asymmetric backfilling under heavy-duty transportation environments, a modular rehabilitation technology utilizing an I-Beam framework is proposed, Adopting a hybrid methodology integrating numerical simulation and field measurements and developing a three-dimensional finite element mode by Midas GTS NX to investigate of progressive deformation behavior in corrugated steel pipe culverts under asymmetric backfill conditions. A modular I-Beam reinforcement design was developed based on structural damage characteristics. Rapid rehabilitation of damaged zones was achieved by integrating standardized component prefabrication, progressive installation techniques, and a mechanism of load transfer synergy between new and existing structures, which was validated through static load testing and finite element model calibration. The results indicate: 1) Asymmetric backfilling caused lateral displacement of 321.6 mm and a peak arch-foot stress of 359 MPa, leading to local buckling instability; 2) After reinforcement with the I-steel frame, the vertical displacement of the arch crown (23.8 mm) and circumferential stress at the arch foot (247 MPa) were restored to the original design levels (24.5 mm, 255 MPa), and the maximum displacement under dynamic loads met the L/300 limit requirement; 3) The relative displacement error between numerical simulation and static load tests was 3.5%, verifying the reliability of the model. As a result, I-Beam framework reinforcement technology enables effective restoration of the load-bearing capacity in damaged culvert structures. The I-steel frame reinforcement technology effectively restores the bearing capacity of damaged structures through rigid support network reconstruction and optimized stress redistribution, providing an efficient solution for repairing corrugated steel pipe culverts in dynamic heavy-duty environments of open-pit mines, with significant engineering promotional value. This technology offers a viable solution for rehabilitating corrugated steel pipe culverts in open-pit mines under heavy-haul transportation conditions, demonstrating significant practical engineering value.