Hard clay undisturbed three-axis sample preparation device and using method thereof

A preparation device and technology for hard clay, which is applied in the field of hard clay original triaxial sample preparation device, can solve the problems of unusable soil samples, out-of-round cutting and sampling, etc., and achieve the goal of increasing stability, ensuring consistency, and huge commercial application value Effect

Active Publication Date: 2017-11-21
ZHONGYUAN ENGINEERING COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the technical problem that the cutting sampling is not round or the soil sample cannot be used, the present invention provides a hard clay original triaxial sample preparation device and its use method

Method used

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  • Hard clay undisturbed three-axis sample preparation device and using method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Such as figure 1 The device for preparing a hard clay original triaxial sample includes a support 1, the support 1 is a cuboid frame, the bottom of the support 1 is provided with a base, the base is provided with a base plate 4, and the middle part of the base plate 4 is provided with a lower fixed disc 5 , the upper fixed disc 5 is provided with the upper fixed disc 6, the upper fixed disc 6 is connected with the guide rod 2, the guide rod 2 passes through the cutter cap 9, the cutter cap 9 is connected with the hollow screw cutter 8, and the cutter cap 9 Threaded with the feed guide rail 11, the feed guide rail 11 is a threaded rod, the feed guide rail 11 passes through the top of the support and is connected to the output end of the stepper motor 10, and the stepper motor 10 is located at the top and is controlled by a controller 13.

[0028] Apply paraffin wax on the surface of the soil sample to be cut to protect the soil sample from the influence of external facto...

Embodiment 2

[0030] The support 1 is a rigid support, wherein the base plate 4 is a circular rigid base, and the base plate 4 and the support 1 are rigid steel plates; the rigid base plate has a thickness of 15 mm and a diameter of 20 cm. There are positioning holes on the base plate 4. Set in the rigid base, the diameter of the positioning hole is 5mm and the depth is 8mm; the rigid support 1 has a thickness of 10mm, a width of 80mm, and a height matching the height of the soil sample and the guide rod. The top of the rigid support is a steel plate with a thickness of 15mm and a diameter of 20cm. The central lines of the disk and the bottom plate are coincident. Other structures are the same as in Embodiment 1.

Embodiment 3

[0032] The fixed disc is divided into an upper fixed disc 6 and a lower fixed disc 5, wherein the lower fixed disc 5 has a diameter of 10 cm, a disc thickness of 4 mm, steel needles are evenly distributed on the disc, and the height of the steel needles is 8 mm, and the lower fixed disc has a diameter of 10 cm and a thickness of 4 mm. There is a ring of steel balls between the bottom surface of 5 and the upper surface of base plate 4, the diameter of the steel ball is 4mm, and there is a cylindrical protrusion matching the base plate 4 at the center of the lower fixed disc 5. The diameter of the cylindrical protrusion is 5 mm and the height is 11 mm. The root guide rod 2 is fixedly connected, the diameter of the upper fixed disc is 61.8 mm, and the thickness is 4 mm. Steel needles are evenly distributed on the lower surface of the upper fixed disc, and the height of the steel needles is 8 mm. The diameter of the guide rod 2 is 4mm, and the height of the guide rod 2 is greater t...

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Abstract

The invention belongs to the field of hard clay sampling, and particularly relates to a hard clay undisturbed three-axis sample preparation device and a using method thereof. The device comprises a support, wherein a base is arranged at the bottom of the support; a bottom plate is arranged on the base; a lower fixing disc is arranged in the middle of the bottom plate; an upper fixing disc is arranged at a position above the lower fixing disc; the upper fixing disc is connected with a guiding rod; the guiding rod penetrates through a tool cap; the tool cap is connected with a hollow spiral tool; the tool cap is in threaded connection with a feeding guide track; the feeding guide track is a threaded rod, penetrates through the top of the support and then is connected with an output end of a stepping motor; and the stepping motor is positioned on the top of the device and is controlled by a controller. The hard clay undisturbed three-axis sample preparation device is skillful in structural design; the size and perpendicularity of a soil sample can be controlled accurately; success rate of soil sample preparation is high; sample preparation time is saved; the sample preparation efficiency is greatly improved; and the business application value is high.

Description

technical field [0001] The invention belongs to the field of hard clay sample preparation, and in particular relates to a hard clay original triaxial sample preparation device and a use method thereof. Background technique [0002] The strength index is an important parameter in the design of foundation engineering, slope engineering and underground engineering. The shear strength of soil materials has always been a hot spot in soil mechanics research. In soil mechanics, there are mainly two methods for measuring soil strength index: direct shear test and triaxial shear test. Due to the disadvantages of the direct shear test, such as determining the shear failure surface in advance and not being able to measure the pore water pressure, the failure strength cannot be accurately expressed. The triaxial shear test has the advantages of clear stress on the sample during the shearing process, can control and measure the pore water pressure, and has a wide range of applications....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28G01N2001/2873
Inventor 李新明孙玉周任克彬祝彦知尹松纠永志卢天佑刘晨辉
Owner ZHONGYUAN ENGINEERING COLLEGE
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