Effects of internal erosion on mechanical properties evaluated by triaxial compression tests
Effects of internal erosion on mechanical properties evaluated by triaxial compression tests
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DOI：
10.3208/jgssp.jpn-127
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发表时间：
2016-01
期刊：
影响因子：
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通讯作者：
M. Sato;R. Kuwano
中科院分区：
文献类型：
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作者：
M. Sato;R. Kuwano
本研究的目的是通过实验室试验来揭示内部侵蚀对力学性能的影响。内部侵蚀是细颗粒随地下渗流的输送。大规模的侵蚀诱发各种地面灾害，如滑坡和天坑。然而，还没有研究过内部侵蚀的影响。这可能是因为侵蚀进展缓慢，由于长期重复的地下渗流，没有任何明显的塌陷或变形。在这项研究中开发了一种新的三轴试验装置，允许试样内部的微小量的内部侵蚀。使用含有约10%粘土的田间土壤。内部侵蚀后，由于向下渗透，试样在排水条件下单调剪切。在试样上安装LDT和夹片，获得了冲蚀和单调剪切过程中的变形特性。
The aim of this research is to reveal the influence of internal erosion on mechanical properties by laboratory testing. Internal erosion is the transportation of fine particles with seepage flows inside the ground. A large degree of erosion induces various ground disasters, such as landslides and sinkholes. However, the influence of a small degree of internal erosion has not been examined. This is probably because the erosion progresses slowly, due to the repetition of seepage flows in the ground over a long period, without any obvious collapse or deformation. A new triaxial testing apparatus was developed in this study, that allows for a subtle amount of internal erosion inside the specimen. A field soil, containing around 10% clay, was used. Following the internal erosion, due to downward seepage, the specimen was monotinically sheared under a drained condition. LDTs and clip gages were mounted onto the specimen and the deformation characteristics were obtained during both erosion and monotonic shearing.