A kind of uniaxial tensile device and its testing method

Abstract

The invention relates to the field of geotechnical engineering experiment equipment. A uniaxial tensile device and a testing method thereof, comprising a base on which a reaction force frame is installed; a first fixed seat is installed on the base, and the first fixed seat is connected to a lifting device in the base; The reaction force frame is provided with a second fixed seat corresponding to the first fixed seat; the second fixed seat is connected with the reaction force frame through a spring; a length measuring instrument is arranged between the second fixed seat and the reaction force frame . The invention uses a calibrated spring to measure the strain of the soil sample or sample when it is destroyed through a length measuring instrument, and then obtains the tensile strength value of the soil sample through Hooke's law. The tensile force of the sample is calculated and measured by the strain of the spring, and the device uses the lower part to change the displacement, which effectively reduces the influence of the sample's own weight on the measurement results. Compared with the prior art, the accuracy of the present invention is higher.

Description

technical field [0001] The invention relates to the field of geotechnical engineering experimental equipment, in particular to a soil uniaxial tensile device and a testing method thereof. Background technique [0002] The tensile strength of soil, because of its small value, is often not valued by people, and with the continuous development of soil mechanics and the improvement of engineering quality requirements, research that does not pay attention to the tensile strength of soil can no longer adapt to the development of the times . Especially with the increasing construction of high earth-rockfill dams, the generation of cracks in earth-rockfill dams is related to the tensile strength of soil, which makes the study of tensile strength of soil more important. The tensile test of existing soil is mainly through direct tensile test (uniaxial tensile test and triaxial tensile test) and indirect tensile test (soil beam bending test, axial fracturing test) to determine the ten...

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Problems solved by technology

And the manufacturing process of the test device is more complicated

[0006] In Hu Haijun, Jiang Mingjing's "A Preliminary Study on the Influence of Sample Preparation Methods on the Uniaxial Tensile Strength of Remodeled Loess", 502 glue was used to connect the sample to the instrument. Invalid result for

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