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土体断裂韧度KIC试验研究

DOI: 10.3969/j.issn.1674-0696.2012.04.13, PP. 788-791

Keywords: 断裂韧度,标准三点弯曲试验,土石比:含水率,土体断裂试验装置,fracturetoughnessofsoil,conventionalthree-pointbendingtest,soil-stoneratio,watercontent,soilfractureapparatus

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Abstract:

:?标准的三点弯曲试验,加荷方向与试样重力方向在同一条直线上,由于土体的抗拉强度很低,在进行土体的三点弯曲试验的时候,试样仅在自重的作用下就会断裂,即使不断裂,重力对测试结果也会产生很大的影响。根据三点弯曲的试验原理,将试样沿底边旋转90°,采用水平加荷的方式,使试样重力与加荷方向垂直,避开了重力对试验结果的影响,并使用自主研发的土体断裂装置测得了土体断裂韧度KIC。

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