Multifunctional in-situ rock and soil body torsional shear specimen device

A multi-functional technology for rock and soil, applied in the field of multi-functional in-situ rock and soil torsional shear sample device, can solve the problem that the in-situ of rock and soil samples cannot be guaranteed, and the torsional shear instruments and equipment are difficult to meet the site requirements , It is difficult to realize the field rock mass torsional shear mechanics test and other problems, to achieve the effect of shortening the test period, protecting the integrity, and reducing the damage of the sample

Pending Publication Date: 2019-06-11
CHINA THREE GORGES UNIV
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Problems solved by technology

However, due to the complex field environment, it is difficult for large-scale indoor torsional shear instruments and equipment to meet the site requirements, and it is d

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  • Multifunctional in-situ rock and soil body torsional shear specimen device
  • Multifunctional in-situ rock and soil body torsional shear specimen device
  • Multifunctional in-situ rock and soil body torsional shear specimen device

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[0025] Hereinafter, the present invention will be described in detail with reference to the drawings and the embodiments:

[0026] Such as figure 1 Among them, a multifunctional in-situ rock-soil torsion shear sample device can be used for compressive-shear mechanics test and tensile-shear mechanics test. The sample devices are force sensor 2, support platform 5, servo motor 3, hydraulic jack 4:

[0027] The controller 1 can control the operation of the servo motor 3 and the hydraulic jack 4; the force sensor 2 controls the normal pressure (pull) force applied by the hydraulic jack 4, and monitors the rotation of the A gear 13 driven by the rotating shaft of the servo motor 3 to apply The side torsion force of the servo motor 3 is used to calculate the shear strength of the sample;

[0028] A servo motor 3 and a hydraulic jack 4 are arranged at the upper end of the support platform 5, and a telescopic rod 11 and a push rod 8 are arranged at the lower end of the support platform 5;

[...

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Abstract

The invention provides a multifunctional in-situ rock and soil body torsional shear specimen device, which comprises a support platform, a servo motor and a hydraulic jack, wherein the servo motor andthe hydraulic jack are arranged at the upper end of the support platform; a telescopic rod and a push rod are arranged at the lower end of the support platform; the upper end of the telescopic rod passes through the support platform to be connected with a transmission shaft of the servo motor; the upper end of the push rod passes through the support platform to be connected with the hydraulic jack; the lower end of the telescopic rod is fixedly provided with a gear A; the push rod is connected with a specimen sleeve through a connecting element; a gear B is connected onto the specimen sleevein a sleeving way; and the gear B is engaged with the fixed gear A. A torsional shear mechanical test instrument uses a force sensor, so that the normal pressure exerted by the hydraulic jack is controlled; the normal tension exerted by the hydraulic jack can also be controlled; through the cooperation of the servo motor and the jack, the normal pressure (tension) and lateral torsional force can be exerted onto the specimen at the same time; and the pressure (tension) torsional shear mechanical experiments of the field specimen can be performed, so that the mechanical performance study on thefield specimen becomes possible.

Description

technical field [0001] The invention belongs to the field of rock and soil engineering mechanics test instruments, and relates to a multifunctional in-situ rock and soil body torsional shear sample device. Background technique [0002] The shear strength parameters of rock and soil are the basic parameters for deformation stability analysis of geotechnical engineering, and the usual methods of obtaining them are laboratory tests and field tests. Among them, the direct shear test is generally carried out in the field test, and the normal stress is considered to be the compressive stress, that is, the compressive shear test is carried out. However, many rocks and soils in engineering not only have the stress state of compressive shear, but also the stress state of tensile shear in many cases, such as the position of slope shoulder. Previous studies have shown that the mechanical properties of rock and soil are significantly different under the tension-shear stress state and t...

Claims

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Application Information

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IPC IPC(8): G01N3/26
Inventor 邓华锋段玲玲支永艳潘登熊雨李涛齐豫
Owner CHINA THREE GORGES UNIV
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