Direct shearing and drawing dual-purpose testing machine for geosynthetics

Abstract

The invention belongs to the field of direct shearing and drawing integrated test equipment, in particular to a direct shearing and drawing dual-purpose testing machine for geosynthetics. The machineis characterized by comprising a test bench, slideway and a test box, a vertical loading system, a horizontal drawing system and compaction equipment, the test box comprises an upper box, a lower box,pulleys arranged at the bottom of the lower box, a narrow slit arranged between the side walls of one sides of the upper box and the lower box in the drawing direction, and tempered glass. the horizontal drawing system comprises a drawing and pressing motor, a tension sensor, a clamp, a geosynthetics material and a plurality of displacement sensors II, and the vertical loading system comprises ahydraulic jack, a vertical counter-force frame, a horizontal pressurizing plate and a displacement sensor I. The upper box is adjustable, the integration of a direct shearing test box and a drawing test box is realized, the conversion is convenient and time-saving, the manufacturing cost is reduced, and the space is saved; the size of the test equipment is larger than that of most existing test equipment, the requirements of relevant specifications can be well met, and the influence of the size effect is reduced as much as possible.

Description

technical field [0001] The invention belongs to the field of direct shearing and drawing integrated test equipment, in particular to a direct shearing and drawing dual-purpose testing machine for geosynthetic materials. Background technique [0002] At present, most of the disclosed equipment has problems such as relatively simple design of test equipment, inconvenient operation, and insufficient guarantee measures for the accuracy of test results. Most of the test equipment can only measure the horizontal displacement of the drawing fixture, and cannot realize the test. During the process, the stress and strain development process of geosynthetics was carefully studied and the reinforcement-soil interface was visually observed. A lot of direct shear equipment fixes geosynthetics by sticking them to steel plates or wooden blocks. In order to make the direct shear test environment closer to the actual project, the lower shear box should also be compacted according to the spec...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies of the existing test instruments, and propose a dual-purpose testing machine for direct shearing and pulling of geosy

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