All-in-one machine for testing soil engineering tension-compression strength

Abstract

The invention discloses an all-in-one machine for testing soil engineering tension-compression strength. The all-in-one machine comprises a control console, wherein a driving wheel and a control device are arranged at one side of the control console; fixed rods are mounted at the two sides of the upper end face of the control console in a mirror image manner; a positioning rod is arranged between the upper ends of the fixed rods; the positioning rod and the fixed rods are rotatably connected and fixed by bolts; a locking nut is arranged in the middle of the positioning rod; a screw hole of the locking nut is internally provided with a screw rod which is rotatably connected and matched with the screw hole; the lower end of the screw rod penetrates through the positioning rod to be connected with an S-shaped tension-compression stress sensor; an upper universal footstock is mounted at the bottom of the S-shaped tension-compression stress sensor; a displacement measurement platform is arranged on the upper end face of the control console. The all-in-one machine can be used for researching the influences of speeds on tensile and compressive strength of a soil body; in a direct tensile test, the deformation amount of the soil body can be accurately determined; meanwhile, a gravity sensor can be used for measuring the change of gravity in a testing process; the all-in-one machine can be used for acquiring data which are rapidly changed in the test and cannot be observed by naked eyes.

Description

technical field [0001] The invention relates to the field of geotechnical testing machinery processing and manufacturing, in particular to an integrated geotechnical tensile and compressive strength test machine. Background technique [0002] In recent years, with the rapid development of my country's economy, the construction of highways, airports, and high earth-rock dams has flourished, and people have put forward higher requirements for the tensile and crack resistance of these buildings or structures. The in-depth study of characteristics has become a hot spot in solving practical engineering problems. [0003] 1. Uniaxial tensile test [0004] The uniaxial tensile test is the most direct test method for measuring the tensile strength of soil. Usually, special clamps or cementing materials are used to fix the two ends of the sample and then directly apply axial tension to the sample. Under the condition of unconfined tension The tensile strength of the soil samples was...

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Problems solved by technology

[0019] (1) In the uniaxial tensile test, there is no reasonable fixing device for the two ends of the soil, which is easy to produce micro-slip, and the test repetition rate is low;

[0020] (2) There are no standardized molds in the radial fracturing test and axial fracturing test;

[0021] (3), because the soil is an elastic-plastic model, gravity plays a certain role in the direct tensile test process, and existing instruments cannot measure the impact of gravity changes on the tensile strength of the soil during the direct tensile test;

[0022] (4) The existing device cannot realize the integration of uniaxial tensile test, radial fracturing test, axial fracturing test and unconfined uniaxial compressive strength of soil

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