CAJ | 학술논문

在三轴试验过程中，采用数字图像测量技术测量试样变形具有非接触和高精度的特点。通过分析三轴试验过程中采集到的试样剪切变形照片、径向及轴向应变场，可以发现：黄土试样在低围压时径向变形较大，且容易出现径向变形局部化；受试样帽的约束，试样的变形是不均匀的，试样中部的变形最大；密度越大，试样抵抗变形的能力越强；原状黄土在结构没有破坏之前能够承受较大的荷载，且变形较小，其结构完全被破坏后的最终变形量趋近于重塑黄土的变形量。
재삼축시험과정중，채용수자도상측량기술측량시양변형구유비접촉화고정도적특점。통과분석삼축시험과정중채집도적시양전절변형조편、경향급축향응변장，가이발현：황토시양재저위압시경향변형교대，차용역출현경향변형국부화；수시양모적약속，시양적변형시불균균적，시양중부적변형최대；밀도월대，시양저항변형적능력월강；원상황토재결구몰유파배지전능구승수교대적하재，차변형교소，기결구완전피파배후적최종변형량추근우중소황토적변형량。
There were some advantages such as non contact and high precision that using digital image processing technique to measure the deforma-tion of less sample in the process of triaxial test. Through the analysis of the photos of deformed sample,radial deformation strain field and axial de-formation strain field,some deformation characteristics of loess can be found. The radial deformation of loess samples under low confining pressure is bigger and prone to localization. Due to the constraints of sample cap,the deformation of the sample is not uniform,and the largest deformation is occurred in middle. The sample with bigger density has stronger ability to resist deformation. Undisturbed samples of loess can bear larger load before their structure is damaged,and their deformation is small. But their final deformation tends to be the remolded loess after their structure is completely destroyed.