Compaction Quality Standard of Earth-Rock Mixture Filler for Abutment Based on Dynamic Deformation Modulus

This study investigates the control of compaction quality in earth-rock mixture fillers based on the dynamic deformation modulus (Evd). Discrete element simulations were employed to construct sub-grade models of earth-rock mixture fillers with varying rock contents. During the compaction process, Evd, settlement differences, porosity, and rolling passes were measured. Building on dual control indicators—porosity and settlement difference—a method for the rapid assessment of compaction quality in earth-rock mixture fillers based on Evd was proposed, accompanied by corresponding quality control standards. Field tests were conducted to validate the accuracy of these standards. The results show that, at a rock content of 70%, the settlement difference and porosity are minimized. After 8 rolling passes, the settlement differences for earthrock mixture filler layers with 30%, 50%, and 70% rock contents are all less than 2 mm, with corresponding Evd values exceeding 55 MPa, 57 MPa, and 60 MPa, respectively, thus meeting the compaction quality requirements. The error between the field test results and simulation results is less than 5%. This study introduces an innovative approach to compaction quality control, offering a fast and accurate method for detecting roadbed compaction quality. It significantly enhances the precision of roadbed and filler compaction control, while optimizing quality management throughout the construction process. Additionally, it presents a novel technique for rapid compaction assessment of roadbeds across various soil types. This work provides valuable theoretical support for the standardization of related industries and contributes to the sustainable development of engineering construction. Keywords: Earth-rock mixture filler, Discrete element, Dynamic deformation modulus, Rolling passes, Porosity, Settlement difference.