利用炭黑充填粉土配制了导电性的土工材料,通过表面布置分布式电极的测试方法,对其内部电阻变化率沿压缩方向进行分布式测量.研究表明:内部裂隙繁衍发展引起的电阻变化可对试样受力阶段进行同步且敏感的响应;根据不同电极间电阻变化率测试值的差异,可反映试样受压破坏演化过程不同部位裂隙扩展程度.研究认为,电极间测试电阻对裂隙扩展具有敏感性,分布式电极的测试方法能够对试样破坏演化过程进行捕捉并反映不同部位裂隙群体发展变化情况,初步具有自测试的能力.
Silt and carbon were used to prepare conductive geo-material, the testing method characterized by distributed electrodes on surface of the soil sample was adopted to measure the distribution of internal resistance increment along the direction of compression.Test results indicate that the resistance variation rate induced from the initiation of the internal fissures can represent the stress state synchronized and sensitive.According to the measurement of resistance variation rate between different electrodes, the propagation of fissures in different zones can be revealed.This study shows that the resistance is sensitive to the extension of fissures.The testing method with distributed electrodes can capture and reflect the evolution of fissures in different zones of soil sample under uniaxial compression.And it has the preliminary capacity to self-test.
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