Portable soft rock triaxial experiment instrument with adjustable confining pressure

Abstract

The invention discloses a portable confining pressure-adjustable soft rock triaxial experiment instrument. The portable confining pressure-adjustable soft rock triaxial experiment instrument comprises a load frame, a confining pressure applying device, an axial pressurizing device and an axial strain metering device, the loading frame is divided into an upper layer and a lower layer, the upper layer is provided with an experimental sample, and the lower layer is provided with an axial loading device; the confining pressure applying device comprises a plurality of clamps, high-strength steel wires and an enclosure structure, the enclosure structure is arranged outside the experimental sample in a sleeving manner, the high-strength steel wires are divided into a plurality of sections, and the sections of the high-strength steel wires are alternately wound outside the enclosure structure clockwise and anticlockwise; steel wire shafts are arranged on the clamps, the two ends of the high-strength steel wires are wound on the steel wire shafts of the corresponding clamps respectively, the clamps are clamped and fixed on the load frame in the radial direction of the experimental sample, and the confining pressure of the high-strength steel wires on the experimental sample can be adjusted by rotating the steel wire shafts; and the axial strain metering device is used for measuring the axial displacement of the experimental sample. The soft rock triaxial experiment instrument has the advantages of being accurate and controllable in confining pressure, capable of providing high confining pressure, convenient to carry, good in economical efficiency and high in axial pressure.

Description

technical field [0001] The invention belongs to the technical field of soft rock triaxial experimental instruments, and relates to a portable soft rock triaxial experimental instrument with adjustable confining pressure. Background technique [0002] Most of the test objects of the ordinary triaxial test instrument are soft soil samples, the test instrument is too bulky to carry, and the ordinary triaxial test instrument cannot meet the confining pressure of the triaxial test with soft rock as the sample. Ordinary triaxial test instruments provide confining pressure to the sample by water injection, the water injection and drainage time is long, the operation process of the experiment is complicated, and the confining pressure that can be provided is small, the confining pressure is about 0.01MPa, which can only meet the needs of rock It is the confining pressure requirement of the triaxial test of the sample, but the triaxial test with soft rock as the research object requi...

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Problems solved by technology

[0002] Most of the test objects of the ordinary triaxial test instrument are soft soil samples, the test instrument is too bulky to carry, and the ordinary triaxial test instrument cannot meet the confining pressure of the triaxial test with soft rock as the sample.

Ordinary triaxial test instruments provide confining pressure to the sample by water injection, the water injection and drainage time is long, the operation process of the experiment is complicated, and the confining pressure that can be provided is small, the confining pressure is about 0.01MPa, which can only meet the needs of rock It is the confining pressure requirement of the triaxial test of the sample, but the triaxial test with soft rock as the research object requires the confining pressure to reach 5MPa to 10MPa, so the ordinary triaxial test instrument cannot meet the triaxial test with soft rock as the sample. Experimental Confining Pressure Requirements

Moreover, the price of an ordinary triaxial tester ranges from hundreds of thousands to millions, and the cost is relatively high, and the volume is too large to be carried. Therefore, there is an urgent need for a portable, adjustable confining pressure tester that can meet the requirements of soft rock confining pressure. Triaxial tester

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