岩土力学Issue(12)：3491-3499,3526,10.
中、高压下粗粒土-结构接触面特性受结构面形貌尺度影响的试验研究
Effect of shape scale on characteristics of coarse grained soil-structural interface under medium and high pressures
摘要
Abstract
By modified DRS-I high pressure direct shear test apparatus, interface shear tests of gravel and different structural planes under medium and high pressures are carried out. With different structural planes having different peak-valley distances H, relative scale R is defined as the ratio of H to average particle size ( 50/RH d ). Effects of relative scale R on mechanical and deformation characteristics of interface shear process under medium and high pressures are studied. The test results show that the relative scale R affects the interface shear energy consumption and shear volume deformation directly; and influential rules are different between medium pressure and high pressure. Whether under medium or high pressure, there exist limited and critical R respectively described as maxR and stR Before maxR , the increase of R results in monotonous change of interface shear energy consumption and shear volume deformation. After maxR , the increase of R will cause shear energy consumption and shear volume deformation meeting a critical state, and the corresponding relative scale is Rst . For above rules closely relate to particle displacement and grain breakage, the limited and critical values of R give new thoughts to research the roughness which affected by relative scale of particles and structural planes under different pressures; and it also has some significance for describing the mechanics and deformation mechanism of interface under different pressures.关键词
粗粒土/接触面/形貌尺度/剪切耗能/体变Key words
coarse grained soil/interface/shape scale/shear energy consumption/volume deformation分类
建筑与水利引用本文复制引用
陆勇,周国庆,夏红春,汪平生..中、高压下粗粒土-结构接触面特性受结构面形貌尺度影响的试验研究[J].岩土力学,2013,(12):3491-3499,3526,10.基金项目
国家自然科学基金资助项目（No.50974117）；江苏省普通高校研究生科研创新资助项目（No. CXZZ12_0936）；深部岩土力学与地下工程国家重点实验室开放基金资助项目（No. SKLGDUEK1109）。 （）
