Modelling rapid non-destructive test using light weight deflectometer on granular soils across different degrees of saturation  

作　　者：Javad Ghorbani Arooran Sounthararajah Troyee Tanu Dutta Jayantha Kodikara 

机构地区：[1]ARC Smart Pavements Hub,Dept.of Civil Engineering,Monash University,VIC,3800,Australia

出　　处：《Journal of Rock Mechanics and Geotechnical Engineering》2024年第7期2732-2748,共17页岩石力学与岩土工程学报（英文版）

基　　金：This research work is part of a research project(Grant No.IH18.03.1);sponsored by the SPARC Hub at the Department of Civil Engineering,Monash University funded by the Australian Research Council(ARC)Industrial Transformation Research Hub(ITRH)Scheme(Grant No.IH180100010).

摘　　要：This study introduces an advanced finite element model for the light weight deflectometer(LWD),which integrates contact mechanics with fully coupled models.By simulating LWD tests on granular soils at various saturation levels,the model accurately reflects the dependence of the LWD modulus on dry density,water content,and effective stress.This model addresses and overcomes the limitations of previous finite element models for this specific problem.Simultaneously,this research presents the first experimentally validated fully coupled contact impact model.Furthermore,the research provides a comparative assessment of elastoplastic and nonlinear elastic models and contrasts an enriched node-tosegment method(developed in this study)with the more precise mortar technique for contact mechanics.These comparisons reveal unique advantages and challenges for each method.Moreover,the study underscores the importance of careful application of the LWD modulus,emphasising the need for sophisticated tools to interpret soil behaviour accurately.

关 键 词：Granular soils PLASTICITY Finite element analysis Contact mechanics MODULUS Degree of saturation 

分 类 号：TU44[建筑科学—岩土工程]