Gravel-mixed clay tensile device and test method suitable for different gravel-mixed particle sizes

Abstract

The invention discloses a gravel-mixed clay tensile device and a tensile test method suitable for different gravel-mixed particle sizes. The device includes a support plate, a loading module, an acquisition module and a uniaxial tensile test set on the support plate. Mold; the uniaxial tensile test mold is in the shape of a dumbbell as a whole, including a fixed part, a tensile movable part, a tensile section between them, and a cover plate. The fixed part is fixedly connected with the support plate, and the tensile movable part passes through The stretching rod is connected with the loading module, and a stress sensor and a displacement sensor are arranged on the stretching rod. The device can adjust the width of the mold according to the width and height of the tensile section of the sample corresponding to the maximum diameter of the gravel in the admixture, and realize the uniaxial tensile test of gravel-mixed clay with different gravel particle sizes on one test device. Strong; fully considering the influence of the maximum particle size of the gravel on the clay sample mixed with gravel, it is closer to the construction site, and in the laboratory test, the sample preparation and test of the sample are more convenient.

Description

technical field [0001] The invention belongs to the technical field of geotechnical tensile test devices, and in particular relates to a gravel-mixed clay tensile device and a tensile test method suitable for different gravel-mixed particle sizes. Background technique [0002] Soil is the product of rock weathering, and has certain shear strength, compressive strength and tensile strength in terms of mechanical properties. However, in engineering construction, the tensile strength of soil is basically not used by people, so when the predecessors studied the strength of soil, most of them ignored the tensile strength of soil. However, it is an unavoidable problem that soil bears tensile stress sometimes in engineering, and tensile stress often occurs around tall buildings. Therefore, in recent years, the problem of soil tensile strength has become more and more prominent, which has aroused people's wide interest. [0003] The test methods for measuring the tensile strength ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of gravel-mixed clay tensile device and tensile test method suitable for different gravel-mixed particle sizes, so as to solve the problem that in the prior art, a mold can only be used for sample preparation corresponding to the maximum particle size of a kind of gravel. Trials, poorly adapted technical issues

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