A Soil Triaxial Tensile Tester

Abstract

The invention provides a three-axis tensile tester for a soil body. A sample three-axis tensile linking device is formed in a space formed by horizontally loaded fixing frames, an operation platform and a top plate, and is provided with eight sample force dragging plates adhered to each side of a cube-shaped sample, wherein each sample force dragging plate is connected with a loading shaft through a dynamometer, the loading shafts are connected with a stretching device. The three-axis tensile tester is further provided with a photoelectric displacement sensor for detecting movement of each sample force dragging plate; the photoelectric displacement sensor, the dynamometers and the stretching device are respectively connected with a signal converter connected with a computer. By virtue of the technical scheme, a feasible tester is provided, and is used for testing the strength characteristics and creep characteristics of the cube-shaped sample under three-axis tensile condition, the testing accuracy and the testing success ratio are high, the practicability is high, and the three-axis tensile tester has the characteristics of simple structure, convenience in operate, stability in control, reliable data, safety, economical efficiency and the like.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering test equipment, and relates to a test device for testing the triaxial tensile strength characteristics and creep characteristics of soil in a geotechnical chamber, in particular to a soil triaxial tensile tester. Background technique [0002] In many engineering problems, soil cracks will occur, and these cracks are often caused by tensile failure of the soil. In addition, many cohesive soils behind retaining walls and cohesive soil slope sliding bodies have cracking phenomena. Although most of the soil units have shear failure in this case, some soil units are also in tensile failure. The stretching directly leads to the cracking of the soil, and the stretching cracks are usually open cracks, which are more harmful. It can be seen that the tensile properties of soil have a great influence on the stability of geotechnical structures and slopes. In recent years, with the rapid de...

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Problems solved by technology

[0009] The purpose of the present invention is to solve the existing soil triaxial tensile equipment problems such as single instrument function, limited range, too complicated test operation, etc., and in order to overcome human factors such as manual step loading control and manual reading measurement in previous tests. For defects that have a greater impact on the results, a computer-controlled fully automatic soil triaxial tensile tester is provided

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