Abstract: The defomaafion characteristic of aggre．gate is important，it is the key factortoealm s the be ng eapty and the thickness 0f aggregate basec．There are many fat,influence the deformation of aggregate，such as material characteristic，content of water，0f compaction，test method ．In this article，diferent dimensiontriaxial test and bE capacity test are present，throughthe result getthe deformation ehamcteristlc 0f aggregate mixture in diferent dimension．This article im proves the test method and the test result is mole appaoch to real condition．

Key words: dimension efect, coeficient of discotmt, aggregate, deformation characteristic, restriction force

摘要： 砂砾石的变形特性对其在工程应用中有重要意义，它是分析砂砾石地基承载力、砂砾石路基基层厚度的关 键．影响砂砾石的变形的因素有很多，如砂砾石的材料特性、含水量、密实度、实验方法等．本文将主要通过对砂砾 石混合料在不同尺寸下的三轴压缩实验及承载力实验来研究砂砾石混合料的变形特性，分析尺寸效应对砂砾石变 形的影响．在测试手段上作进一步改进，以使测试的砂砾石变形特性更接近实际．

关键词: 尺寸效应, 折减系数, 砂砾石, 变形特性, 约束力