JPH07306131A - Shearing-force measuring tester - Google Patents

Abstract

PURPOSE:To make it possible to measure the simple shearing performances such as the cohesion of soil, engaging strength and prediction of disintegration by measuring the changing state of a sample, which is generated by moving a stage plate horizontally as the correlation of the XY position of the stage plate and the data of a displacement gage in the horizontal and vertical directions. CONSTITUTION:A sample 1 of sediment or the like is contained in a tube frame 22 housed in a tube bag 21 made of coil-shaped thin metal wires 20 and a sheet of thin synthetic resin or the like. The tube frame is provided on a stage plate 23. The stage plate 23 is made to form a unitary body together with an XY table 26 comprising an X-axis lot 24 and a Y-axis lot 25. The displacement force in the horizontal direction of the upper part of the sample 1, which is caused by the movement of the stage plate 23, is measured with a plurality of displacement force gages 31. The sample 1, to which a vertical load is added by a load mounting stage 19 through the bearing of horizontal moving guide 18 is mounted on the stage plate 23. The displacement force gages 31 are provided in contact with a Z-acting plate 14, which is moved in the vertical direction. The changing state of the sample 1 such as this is measured as the correlation of position displays 29 for indicating the XYZ positions of numerical controller 30 and the data of the displacement force gages 31, and the sample 1 is tested.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention applies a specific load to a sample such as earth and sand, bricks, blocks, stone walls, artificial substances, and seabeds and grounds, and measures the adhesion and engagement strength of the substances. The present invention relates to a shear force measurement test device.

[0002]

2. Description of the Related Art At present, a similar one is called a soil simple shear tester which is used in a special area related to civil engineering. As shown in the conceptual diagram of FIG. 1, a sample 1 such as earth and sand is housed in a flexible cylinder frame 2, a load is applied by a loading plate 5 at the tip of a cylinder 4 that hangs down on a column 3, and the sample 1 is placed. A horizontal linear motion is given to the base plate 6 by the cylinder 7, and the generated change of the sample 1 is measured by the strain gauge 8 and the force meter 9 as a load change related to the loading plate 5, and a rapid change called shear is detected and measured. It is a thing. However, a tilt component force is applied to the sample 1 with respect to the axial force, and if the deformation is not uniform, a great amount of time is required for correcting and organizing the collected data, and the reliability is significantly impaired.

[0003]

[Problems to be Solved by the Invention] Improving the performance of the current simple soil shear tester and introducing new concepts and functions,
Enables various measurements such as bricks, blocks, stone walls, artificial substances other than fine materials, and unknown substances such as the seabed, the ground floor, and extraterrestrial planets, as well as adhesion and engagement strength, and prediction of collapse. At the same time, it is an object to establish a standard prototype of this kind of test equipment and test method in the future.

[0004]

[Means for Solving the Problems] The operation to be applied to the sample is based on the current simple soil shear tester, but the stable measurement and the rigidity of the whole device to realize the diversification of the measurement are correlated with each other. Along with the mechanism and measurement method that emphasizes, the numerical operation and data of each operation that enables theoretical elucidation of sample changes during the test will be made.

[0005]

[Methods and Examples] The method of the present invention will be described with reference to FIG. A highly rigid machine frame 11 is integrated with the base 10, and a Z-axis actuator 12 for pressurization is provided on the upper part.
The Z actuating plate 14 is attached to the shaft 13 and the slider 15 having high rigidity is vertically moved. The slider 15 vertically slides on a slide guide 17 via a slide bearing 16 provided on the machine frame 11, and a loading plate 19 applies a vertical load to the sample 1. As shown in the figure, the sample 1 such as earth and sand is placed on a base plate 23 by accommodating a coiled thin metal wire 20 in a cylinder frame 22 which is housed in a cylinder bag 21 made of a thin synthetic resin sheet. Samples that can be built and formed by themselves, such as bricks and block materials, are cylinder frames 22
It may be directly installed on the base plate 23 without using. The base plate 23 is XY according to the X-axis lot 24 and the Y-axis lot 25.
It is integrated with the table 26. 27 is an X-axis actuator, 28 is a Y-axis actuator, and a numerical controller 3 having a Z-axis actuator 12 and a position display 29.
It is set to 0 to enable two-dimensional or three-dimensional operation by the numerical control program. Each axis actuator can be replaced with an NC motor, for example. Reference numeral 18 denotes a horizontal movement guide which is a feature of the present invention, and a sample 1 to which a vertical load is applied by a loading table 19 via a bearing.
The displacement force in the horizontal direction of the upper portion of the sample 1 due to the movement of the base plate 23 on which is mounted is measured by a plurality of displacement force meters 31 arranged. In order to respond to various sample characteristics, the displacement force meter 31
It is also provided in contact with the vertically moving Z operating plate 14. Displacement force meter 3
Although 1 symbolically shows a mechanical shape, an optical one or an electric one may be used. This device
The change state of the sample 1 is determined by the XY of the numerical controller 30.
Position display 29 showing Z position, and a plurality of displacement force meters 31
It is measured as a correlation of data, and the test of Sample 1 is performed.

[0006]

[Effects of the Invention] It is necessary to establish data data for structures such as those in earthquake countries and rainfall countries such as Japan, as well as for structures that can be considered in the future, such as the seabed, the underground, and extraterrestrial planets. However, the purpose and effect of the present invention are present here.

[Brief description of drawings]

FIG. 1 shows a conceptual diagram of a similar prior art.

FIG. 2 shows a conceptual diagram of an embodiment of the present invention.

[Explanation of symbols]

 1 Sample 2 Cylindrical Frame 3 Struts 4 Cylinder 5 Loading Plate 6 Base Plate 7 Cylinder 8 Strainmeter 9 Force Meter 10 Base 11 Machine Frame 12 Z-axis Actuator 13 Z-axis Shaft 14 Z Actuator 15 Slipper 16 Slide Bearing 17 Sliding Guide 18 Horizontal movement guide 19 Loading plate 20 Metal thin wire 21 Tube bag 22 Tube frame 23 Base plate 24 X-axis lot 25 Y-axis lot 26 XY table 27 X-axis actuator 28 Y-axis actuator 29 Position display 30 Numerical control device 31 Displacement force meter

Claims (1)

[Claims] 1. A base plate 2 on the bottom surface of a sample 1 when a vertical load in the Z direction is applied to the sample 1 by a loading plate 19 and is being applied.
3 is horizontally moved by the XY table 26, and the change state of the generated sample is measured as a correlation between the XY position of the base plate 23 and the displacement dynamometer 31 data arranged in the horizontal and vertical directions of the loading plate 19. Shearing force measuring and testing device.