Experimental Researches On Engineering Behaviors Of Rockfill Materials In Rock-filled Highway Roadbed

The rockfills and rock-soil mixed highway roadbed are primary structural forms inthe mountainous areas of our country. How to complete the virtual compaction withsame energy to earn the best density and intensity with the optimal grain compositionand liquid water content and how to consider different kinds of factors objectively foranglicizing and researching the compacting effects are of great importance for theconstruction methods and quality control. The paper experimented and researched theengineering properties of rockfills in JinJi highway with the field experiments,in-house experiments and finite element calculation. The research stratagem andconclusions can be summarized as follow:The paper analyzed the elementary theories on grain structure, intensity anddeformation characteristics of rockfills and summarized the scale effect theory onrockfill way of cracking under pressure.The paper tested the properties and analyzed the compacted effect of the pressedroadbed with field experiment, grain composition, void volume, sedimentation,flexure, modulus of resilience, as well as CBR examination and designed a mass bulkcompress meter for in-house experiment to research the cracked properties underpressure and gain the stress-strain relationship of rockfill. After that, analyzed the gaincomposition, nonuniformity coefficient, relationship of the particle size and bearingcapacity and demonstrated with the finite element analysis. In the end, the papersummarized the dependence of particle size and rockfill material bearing capacity.The paper tested the deformation characteristics, grain composition and pavementsedimentation fore-and-aft and then demonstrated with the finite element analysis.