Testing instrument and testing method for detecting tensile strength of soil body by using centrifugal force

Abstract

The invention discloses a testing instrument and a testing method for detecting the tensile strength of a soil body by using a centrifugal force. The invention aims at actually and really determining and evaluating the tensile strength property of the soil body by using a method for generating a tension force through the high-speed rotation of a soil body test sample. According to the adopted technical scheme, the testing instrument comprises a motor (6), wherein the motor (6) is connected with a soil sample fixing frame (2); the motor (6) can drive the soil sample fixing frame (2) to rotate; the soil sample fixing frame (2) is fixedly provided with a rail for mounting a soil sample and a rail is horizontally arranged; the motor (6) is connected with a computer (5); and the computer (5) can collect the rotary speed of the motor (6) and calculate stress strain and a stress path when the soil sample is damaged, so that the tensile strength of the soil body is determined.

Description

Technical field [0001] The invention belongs to the technical field of soil testing, and specifically relates to a test instrument and a test method for measuring the tensile strength of soil by using centrifugal force. Background technique [0002] At present, most of the instruments and methods for determining the tensile strength of soil are controversial, and it is basically difficult to remove the interference at the connection between the two ends of the soil sample. Therefore, the measured tensile strength value of the soil generally cannot accurately reflect the soil. The true tensile strength. The well-known methods and instruments for evaluating the tensile strength characteristics of soil generally require fixing the ends of the soil sample with clamps. Due to the existence of the clamps, the stress-strain relationship of the soil itself is greatly changed and cannot be truly reflected. The tensile strength characteristics of the soil itself, some methods use the meth...

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Problems solved by technology

[0002] At present, most of the instruments and methods for measuring the tensile strength of soil are controversial, and it is basically difficult to remove the interference at the junction of the two ends of the soil sample, so the measured tensile strength of the soil generally cannot accurately reflect the soil The true tensile strength of

The known methods and instruments for evaluating the tensile strength characteristics of soil generally need to fix the two ends of the soil sample with clamps. Due to the existence of the clamps, the stress-strain relationship of the soil itself has been greatly changed, and it cannot truly respond The tensile strength characteristics of the soil itself, some methods use the method of amplification at both ends to offset this effect, but the actual effect is not ideal, and the measured tensile strength value is still different from the real situation

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