CN109724883A - Soil freezing-thawing direct shear test instrument - Google Patents
Soil freezing-thawing direct shear test instrument Download PDFInfo
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- CN109724883A CN109724883A CN201910147028.0A CN201910147028A CN109724883A CN 109724883 A CN109724883 A CN 109724883A CN 201910147028 A CN201910147028 A CN 201910147028A CN 109724883 A CN109724883 A CN 109724883A
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- shear box
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- vertical loading
- thawing
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Abstract
The present invention relates to soil freezing-thawing direct shear test instruments, including organic frame, shear box is provided in rack, rack upper surface side is equipped with the horizontal force component for exerting a force to lower shear box level, the rack upper surface other side is equipped with the Vertical loading component for vertically exerting a force to upper shear box, a rear support being fixed together with upper shear box is fixed in rack, level force component includes turbine screw lift, horizontal force value sensor, horizontal force value sensor side is connected to the power output end of turbine screw lift by connector, the other side is fixedly connected on lower shear box by connector, Vertical loading component includes upper cross plate, Vertical loading oil cylinder, pressure at right angle sensor, platen, pressure at right angle sensor is fixedly connected on Vertical loading oil cylinder bottom telescopic end by cylinder connector.The present invention can reduce hand labour intensity, reduce test error, easy to operate, velocity-stabilization, and test data is reliable and stable.
Description
Technical field
The present invention relates to technical field of test equipment, are specifically related to soil freezing-thawing direct shear test instrument.
Background technique
The shearing strength of soil is soil under outer force conditions, and a portion soil body is sliding for the another part soil body
The possessed ultimate strength for resisting shearing when dynamic, the cohesive force and internal friction angle of soil are the main of characterization soil shear characteristic
Parameter, the relationship between the shearing strength of soil, cohesive force and internal friction angle are calculated by Coulomb's equation.The shearing of soil is special at present
Property using boxshear apparatus carry out direct shear test acquisition, but traditional boxshear apparatus is there are determination data precision is lower, unhandy deficiency.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of soil freezing-thawing direct shear test instrument, determination data accuracy
Height, easy to operate, test data is reliable and stable.
In order to solve the above technical problems, the present invention is the following technical schemes are provided: soil freezing-thawing direct shear test instrument, including organic
Frame is provided with the shear box for placing soil in rack, and shear box includes the upper shearing being fixed together by fixing bolt
The coaxial of box and lower shear box, upper shear box and lower shear box is distributed, and rack upper surface side is provided with for cutting under
The horizontal force component of box level force is cut, the rack upper surface other side is provided with vertical for vertically exerting a force to upper shear box
Charging assembly is fixed with a rear support being fixed together with upper shear box, the horizontal force component packet in the rack
Turbine screw lift, horizontal force value sensor are included, horizontal force value sensor side is connected to turbine screw rod by connector
The power output end of elevator, the other side are fixedly connected on lower shear box by connector, and the Vertical loading component includes
The upper cross plate of one horizontal distribution, the Vertical loading oil cylinder being vertically fixed on upper cross plate, pressure at right angle sensor, one are horizontally disposed with
And the platen being coaxially distributed with shear box, platen upper surface center position offer ball-and-socket, the bulb of pressure at right angle sensor
It is fixed in the ball-and-socket of platen to coaxial distribution, and pressure at right angle sensor is fixedly connected on Vertical loading oil by cylinder connector
Cylinder bottom portion telescopic end, upper cross plate are fixedly connected on the rack by four columns being vertically distributed, are fixed with and are used on a column
Detect the displacement sensor of lower shear box shear displacemant.
It on that basis of the above technical scheme, further include having pallet, the roller stand containing roller, the lower shear box is fixed on
In pallet, pallet is lain on roller, and roller stand is fixed on the rack.
On that basis of the above technical scheme, it is provided with heating element in the platen, is provided with cooling module in pallet.
It on that basis of the above technical scheme, further include the driving device having for driving turbine screw lift, the driving
Device includes the servo motor being fixed on the rack, the speed reducer being fixedly connected with servo motor, is fixed on speed reducer
Drive sprocket, be fixed on turbine screw lift power intake driven sprocket, drive sprocket and driven sprocket chain conveyer
Connection.
Compared with the prior art, the invention has the beneficial effects that: the present invention can reduce hand labour intensity, reduce
Test error, easy to operate, velocity-stabilization, test data are reliable and stable.
Detailed description of the invention
Fig. 1 is perspective view of the present invention；
Fig. 2 is side view angled arrangement schematic diagram of the present invention.
Figure label are as follows: 1- rack, 2- servo motor, 3- speed reducer, shear box under 4-, the upper shear box of 5-, 6- rear support
Seat, 7- Vertical loading oil cylinder, 8- upper cross plate, the horizontal force value sensor of 9-, 10- turbine screw lift, 11- drive sprocket, 12-
Driven sprocket, 13- connector, 14- pallet, 15- roller stand, 16- roller, 17- column, 18- cylinder connector, 19- displacement sensing
Device, 20- pressure at right angle sensor, 21- platen.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Figures 1 and 2 it is found that soil freezing-thawing direct shear test instrument, including organic frame 1, it is provided in rack 1 for placing
The shear box of soil, shear box include the upper shear box 5 being fixed together by fixing bolt and lower shear box 4, upper shear box 5
It is distributed with the coaxial of lower shear box 4；A rear support 6 being fixed together with upper shear box 5, benefit are fixed in rack 1
The upper stability of shear box 5 during the test is ensured with rear support 6；Meanwhile the tester further includes having pallet 14, containing
The roller stand 15 of roller 16, lower shear box 4 are fixed in pallet 14, and pallet 14 is lain on roller 16, and roller stand 15 is fixed on
In rack 1, in test, it is possible to reduce the frictional force between lower shear box 4 and rack 1 avoids frictional force to shearing numerical value
It influences.
1 upper surface side of rack is provided with for the horizontal force component to the horizontal force of lower shear box 4, level force
Component includes turbine screw lift 10, horizontal force value sensor 9, for driving the driving of turbine screw lift 10 to fill
It sets, horizontal 9 side of force value sensor is connected to the power output end of turbine screw lift 10 by connector 13, the other side leads to
It crosses connector 13 and is fixedly connected on lower shear box 4；The driving device includes the servo motor 2 being fixed in rack 1 and servo
Speed reducer 3 that motor 2 is fixedly connected, is fixed on the dynamic of turbine screw lift 10 at the drive sprocket 11 being fixed on speed reducer 3
The driven sprocket 12 of power input terminal, drive sprocket 11 are connect with 12 chain conveyer of driven sprocket.Turbine silk is driven by servo motor 2
Bar elevator 10 is horizontal to lower shear box 4 to exert a force, and measures force value using horizontal force value sensor 9 and is transferred to control system, leads to
It crosses the adjustable horizontal force size of manipulation servo motor 2 and speed, velocity-stabilization, the data precision is high.
The 1 upper surface other side of rack is provided with the Vertical loading component for vertically exerting a force to upper shear box 5, this vertically adds
Upper cross plate 8, the vertical Vertical loading oil cylinder 7 being fixed on upper cross plate 8, pressure at right angle that component includes a horizontal distribution is carried to pass
The platen 21 that sensor 20, one is horizontally disposed with and is coaxially distributed with shear box, 21 upper surface center position of platen offer ball-and-socket,
The bulb of pressure at right angle sensor 20 is fixed in the ball-and-socket of platen 21 with being coaxially distributed, and pressure at right angle sensor 20 passes through oil
Cylinder connector 18 is fixedly connected on 7 bottom telescopic end of Vertical loading oil cylinder, and the column 17 that upper cross plate 8 is vertically distributed by four is fixed
It is connected in rack 1, the displacement sensor 19 for detecting lower shear box shear displacemant is fixed on a column 17.By vertical
Load cylinder 7 drives platen 21 to move down application vertical load, and utilizes 20 determination data of pressure at right angle sensor, and pass through behaviour
Control Vertical loading oil cylinder 7 can apply different loads value.
Soil is placed in shear box, after soil consolidation, removes the fixing bolt on shear box and lower shear box,
Start Vertical loading oil cylinder and apply predetermined load, predeterminated level power then is applied to lower shear box using turbine screw lift and is opened
Beginning shearing test.Under pressure at right angle, applies horizontal shear force and sheared, seek the shear stress and shear displacemant when destruction.This
Invention can reduce hand labour intensity, reduce test error, easy to operate, velocity-stabilization, and test data is reliable and stable.
Moreover, being provided with heating element in the platen 21 of tester of the present invention, cooling module is provided in pallet 14；It utilizes
Heating element and cooling module can go out different temperature conditions for Simulated Soil, measure the test number under condition of different temperatures
According to strong applicability.Specific heating element and cooling module can also be adopted using the liquid medium being connected to extraneous circulation
With heating sheet and cooling piece etc., as long as can satisfy functional requirement of the present invention, and will not be described here in detail.
Claims (4)
1. soil freezing-thawing direct shear test instrument, including organic frame, the shear box for placing soil, shear box packet are provided in rack
Include the upper shear box and lower shear box being fixed together by fixing bolt, the coaxial point of upper shear box and lower shear box
Cloth, rack upper surface side are provided with the horizontal force component for exerting a force to lower shear box level, the rack upper surface other side
Be provided with the Vertical loading component for vertically exerting a force to upper shear box, it is characterised in that: be fixed in the rack one with it is upper
The rear support that shear box is fixed together, the horizontal force component include turbine screw lift, horizontal force value sensing
Device, horizontal force value sensor side is connected to the power output end of turbine screw lift by connector, the other side passes through company
Connector is fixedly connected on lower shear box, and the Vertical loading component includes the upper cross plate of a horizontal distribution, is vertically fixed on
Vertical loading oil cylinder, pressure at right angle sensor on transverse slat, the horizontally disposed and platen that is coaxially distributed with shear box, on platen
Ball-and-socket is offered at centre of surface position, the bulb of pressure at right angle sensor is fixed in the ball-and-socket of platen with being coaxially distributed, and
Pressure at right angle sensor is fixedly connected on Vertical loading oil cylinder bottom telescopic end by cylinder connector, and upper cross plate is vertical by four
The column of distribution is fixedly connected on the rack, and the displacement sensing for detecting lower shear box shear displacemant is fixed on a column
Device.
2. soil freezing-thawing direct shear test instrument according to claim 1, it is characterised in that: further include having pallet, containing roller
Roller stand, the lower shear box is fixed in pallet, and pallet is lain on roller, and roller stand is fixed on the rack.
3. soil freezing-thawing direct shear test instrument according to claim 2, it is characterised in that: be provided with heating unit in the platen
Part is provided with cooling module in pallet.
4. soil freezing-thawing direct shear test instrument according to claim 1, it is characterised in that: further include having for driving turbine silk
The driving device of bar elevator, the driving device include the servo motor being fixed on the rack, are fixedly connected with servo motor
Speed reducer, be fixed on speed reducer drive sprocket, be fixed on turbine screw lift power intake driven sprocket,
Drive sprocket is connect with driven sprocket chain conveyer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147028.0A CN109724883A (en) | 2019-02-27 | 2019-02-27 | Soil freezing-thawing direct shear test instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910147028.0A CN109724883A (en) | 2019-02-27 | 2019-02-27 | Soil freezing-thawing direct shear test instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109724883A true CN109724883A (en) | 2019-05-07 |
Family
ID=66300888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910147028.0A Pending CN109724883A (en) | 2019-02-27 | 2019-02-27 | Soil freezing-thawing direct shear test instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109724883A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823717A (en) * | 2019-11-01 | 2020-02-21 | 广州大学 | Semi-flexible pavement shear strength testing device and testing method |
| CN111089783A (en) * | 2020-01-16 | 2020-05-01 | 中国科学院武汉岩土力学研究所 | Shearing box connecting device |
-
2019
- 2019-02-27 CN CN201910147028.0A patent/CN109724883A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110823717A (en) * | 2019-11-01 | 2020-02-21 | 广州大学 | Semi-flexible pavement shear strength testing device and testing method |
| CN111089783A (en) * | 2020-01-16 | 2020-05-01 | 中国科学院武汉岩土力学研究所 | Shearing box connecting device |
| CN111089783B (en) * | 2020-01-16 | 2021-03-30 | 中国科学院武汉岩土力学研究所 | Shearing box connecting device |
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