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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。
The conductive geotextile material was prepared by filling the silt with carbon black. The distribution of the internal resistance change rate along the direction of compression was measured by the test method of distributed electrodes on the surface. The results show that the resistance change caused by the propagation of internal cracks can synchronously and sensitively respond to the stress phase of the specimen. According to the difference of the resistance change rates between different electrodes, the crack propagation at different locations during the compression failure evolution can be reflected degree. The study shows that the resistance between the electrodes is sensitive to the crack propagation. The distributed electrode test method can capture the evolution of the sample damage and reflect the development and changes of the fracture groups in different parts, and initially has the capability of self-testing.