摘要
粗粒土既是一种天然地质体,又能用作建筑材料,在自然界中广泛存在,其力学性质研究对实际工程实践至关重要.在大量关于粗粒土试验与力学性质研究文献的基础上做了以下分析和总结:将粗粒土试验分为三类,包括室内试验、原位试验和数值试验,分别对每种试验的试验原理、仪器、方法和适用范围进行了详细介绍;根据粗粒土力学性质研究现状,重点对粗粒土的剪胀性、颗粒破碎性和软化性这三种特性从形成机制、影响因素和描述方法上进行了深入总结.在此基础上,指出粗粒土力学性质研究方面存在如下不足:现有方法和理论存在一定局限性、宏观特性发生机理假设缺乏客观验证、宏观特性难以用细观力学演绎、多相耦合下的力学性质鲜有研究.最后,从试验、理论和数值仿真试验角度提出关于粗粒土力学性质研究的展望.
Coarse-grained soil,as both geological mass and construction material,is extensively spread in nature. The mechanical properties of coarse-grained soil are of great importance to practical engineering in consequence. In reviewof related literatures,it was analyzed and summarized on tests and mechanical properties of coarse grained soils as follows： the tests fall into three types including laboratory,in-situ and numerical tests,respectively introduced about the testing principles, apparatus, operations, and applicability; especially,dilatancy,granular breakability and softening behaviors of coarse-grained soil are respectively summarized,from forming mechanism,influences and description methods perspectives. The overviewabove indicates four insufficiencies of research on coarse-grained soil mechanical properties： existing methods and theories have certain limitations; assumptions on genetic mechanisms of macro properties remain to be verified; it＇ s difficult to deduce macro performances from mesomechanics perspective; multiphase coupling mechanical properties are seldom involved. Finally,the research prospects in mechanical properties of coarse-grained soil were put forward from the views of tests,theories and numerical simulations.
出处
《冰川冻土》
CSCD
北大核心
2016年第4期943-954,共12页
Journal of Glaciology and Geocryology
基金
国家重点基础研究发展计划(973计划)项目(2011CB710606)
国家自然科学基金项目(41230637)资助
关键词
土力学
粗粒土
试验
力学特性
研究进展
soil mechanics
coarse-grained soil
test
mechanical property
research progress
