铁道科学与工程学报2017，Vol.14Issue(8)：1615-1622,8.
模拟压实机械-土接触形式的细砂填料碾压试验
Compaction experiment of fine sand filler simulating compaction machinery-soil contact form
摘要
Abstract
A series of soil tests were carried out about the abundant fine sand filler taken from Liaohe river Huo- Bo railway, including particle analysis tests, particle density tests, relative density tests, standard compaction tests and so on. By building a small sandbox model, comparison tests were conducted, which simulated compaction machinery-soil contacts' effect on compacting fine sand filler in the forms of cylindrical, flat and concave plate. The influence of the type of plate on deformation shape and dry density was analysed. Studies show that the uniform-graded fine sand filler with less fine soil has a gentle "√" type compaction curve and it is easy to obtain greater dry density in completely dry or fully wet. Compaction machinery-soil contact form has significant effects on compaction characteristics of fine sand filler. The presence of external squeeze effect and stress concentration feature of cylindrical contact is easy to make cohesion less fine sand filler form significant lateral deformation andeven local shear failure. Flat and concave contacts' stresses are relatively uniform and have a certain lateral restraint ability. The deformations are mainly compaction subsidence and it is more suitable for fine sand filler compaction.关键词
细砂填料/压实机械-土接触形式/小型砂箱模型/模拟压实Key words
fine sand filler/compaction machinery-soil contact form/small sandbox model/simulating compaction分类
建筑与水利引用本文复制引用
张猛,张良,金发良,罗强,刘孟适,刘亚坤..模拟压实机械-土接触形式的细砂填料碾压试验[J].铁道科学与工程学报,2017,14(8):1615-1622,8.基金项目
国家重点基础研究发展规划(973计划)项目(2013CB036204) （973计划）
沈阳铁道勘察设计院有限公司科研项目(2014-zx1409) （2014-zx1409）
