| 土体断裂韧度K_(IC)试验研究 |
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| 引用本文： | 廖培伟,唐红梅.土体断裂韧度K_(IC)试验研究[J].重庆交通大学学报(自然科学版),2012,31(4):788-791. |
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| 作者姓名： | 廖培伟 唐红梅 |
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| 作者单位： | 重庆交通大学岩土工程研究所,重庆,400074 |
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| 基金项目： | 国家自然科学基金项目(40171017);重庆交通大学研究生创新基金项目(2011(上)第02号) |
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| 摘 要： | 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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| 关 键 词： | 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 |
Experimental Study on the Fracture Toughness KIC of Soil |
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| Liao Peiwei
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Tang Hongmei.Experimental Study on the Fracture Toughness KIC of Soil[J].Journal of Chongqing Jiaotong University,2012,31(4):788-791. |
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| Authors: | Liao Peiwei Tang Hongmei |
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| Institution: | (Institute of Geotechnical Engineering,Chongqing Jiaotong University,Chongqing 400074,China) |
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| Abstract: | Conventional three-point bending test,the loading direction and the gravity direction of the sample are in the same line.Because of the low tensile strength of soil,the sample will break only under the sample deadweight at the three-piont test of soil.Even if the sample is not broken,the deadweight will exert a great influence on the test results.According to the principle of three point bending test,the sample along the bottom edge to rotate 90°,by using horizontal loading way,the deadweight of sample is vertical to loading direction.In this way,the effect of gravity on the test results is avoided.The fracture toughness of soil is obtained by breaking assembly of soil which is independently developed. |
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| Keywords: | fracture toughness of soil conventional three-point bending test soil-stone ratio water content soil fracture apparatus |
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