CN102169062B - Sample cutter for preparing undisturbed loess sample for triaxial test - Google Patents

Sample cutter for preparing undisturbed loess sample for triaxial test Download PDF

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Publication number
CN102169062B
CN102169062B CN2011100241409A CN201110024140A CN102169062B CN 102169062 B CN102169062 B CN 102169062B CN 2011100241409 A CN2011100241409 A CN 2011100241409A CN 201110024140 A CN201110024140 A CN 201110024140A CN 102169062 B CN102169062 B CN 102169062B
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China
Prior art keywords
sample
cut
loess
triaxial test
prepare
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Expired - Fee Related
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CN2011100241409A
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Chinese (zh)
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CN102169062A (en
Inventor
谷天峰
王家鼎
谢婉丽
赵金刚
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Northwest University
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Northwest University
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Abstract

The invention discloses a sample cutter for preparing an undisturbed loess sample for a triaxial test. The sample cutter comprises a bracket on which a base plate is arranged; a synchronous motor is arranged below the base plate; a loess downward cutting disk is arranged on the base plate; the loess downward cutting disk is driven by the synchronous motor to rotate; a supporting stand column is distributed on the base plate; a top plate is arranged on the supporting stand column; a connecting shaft is arranged on the top plate; the connecting shaft is provided with a loess upward cutting disk corresponding to the loess downward cutting disk; a telescopic push rod is arranged on the top plate; a direct-current motor is arranged above the telescopic push rod; a loess cutter frame and a linear motor are arranged below the telescopic push rod; a loess cutter is arranged on the loess cutter frame; and the linear motor drives the loess cutter frame to do reciprocating motion on a guide rail. The sample cutter is convenient to use and can precisely control the size of a sample during sample preparation; moreover, the automation degree is high and the sample preparation efficiency can be improved.

Description

A kind ofly be used to prepare the cut kind appearance of triaxial test with original state loess sample
Technical field
The present invention relates to a kind of equipment, be specifically related to a kind of the cut kind appearance of triaxial test that be used to prepare with original state loess sample.
Background technology
At present, when carrying out the triaxial test of soil, generally all to carry out necessary processing and preparing to soil sample according to the requirement of testing regulations.For disturbed soil, generally be to adopt with the supporting sampling device that hits of instrument the soil sample for preparing is hit reality by predetermined dry density layering, be directly installed on then on the test base, make an experiment.And for the preparation of undisturbed soil sample, general adopt with test apparatus supporting cut native device with the soil sample cutting forming.The version of the cutting soil disk of each instrument manufacturer production is except that there are some differences in fixed frame at present; It is used to place and fixedly the part of soil sample is basic identical; All be a disk that can rotate to be installed up and down respectively at fixed frame; Clamp in the middle of during sample preparation soil sample being placed on two disks, continuous rotational fixation soil sample disk then, and carry out cutwork with cutting native cutter or fret-saw.Because the soft or hard of soil sample differs greatly, and in sample making course, has following problem: (1) at the loess water percentage hour, loess is hard or moulds state firmly; When employing is cut native cutter and is cut soil; Firmly hour be difficult to cut,, be prone to cause soil sample broken (or piece is fallen in the part) if firmly excessive; When the loess water percentage was big, loess was mecystasis, and intensity reduces significantly, and is uneven as firmly when cutting soil, is prone to cause soil sample torsional fracture or local cutting excessively.Problems such as (2) employing is manual cuts, and the soil sample size Control is difficult for, and diameter is inconsistent up and down to be prone to soil sample, and soil sample is round.In addition, the structure of loess is loose, and the axial torsion that soil sample can bear is very little, if adopt the cutting process of similar lathe, certainly will increase the axial torsion of soil sample, causes the soil sample disturbance.
Summary of the invention
Defective or deficiency to above-mentioned prior art existence; The objective of the invention is to; Be provided for preparing the cut kind appearance of triaxial test with original state loess sample, this instrument can overcome the manual disturbance of kind process to soil sample of cutting, and improves the precision and the efficient of sample preparation; So that soil sample is carried out quiet three and moving triaxial test, obtains believable test figure.
In order to realize above-mentioned task, the present invention takes following technical solution:
A kind ofly be used to prepare the cut kind appearance of triaxial test with original state loess sample, comprise support, base plate is arranged on the support, it is characterized in that in floor below synchronous motor is installed, base plate is provided with down cutting soil disk, this time cutting soil disk is by the synchronous motor driven rotary; On base plate, be distributed with support post, top board is arranged on the support post, coupling shaft is installed on top board, have on the coupling shaft and the corresponding cutting soil disk of going up of following cutting soil disk; Telescopic push rod also is installed on the top board, above telescopic push rod, is provided with direct current generator, native knife rest and linear electric motors are cut in telescopic push rod below, cut to be equipped with on the native knife rest and cut native cutter, and linear electric motors drive cuts the to-and-fro movement on guide rail of native knife rest.
Of the present invention be used to prepare triaxial test with original state loess sample to cut kind appearance precision high, automaticity is high, is applicable to dynamic and static triaxial test sample preparation, also can satisfy research and production sample preparation needs.Its major advantage is: vertical cutting way is adopted in (1), reduces the disturbance of working angles to soil sample; (2) control accuracy is high, adopts stepper motor to carry out size Control, the precision<0.1mm of stepper motor, so the size Control of soil sample is relatively stricter; (3) easy to operate, the control of instrument can be adopted the sample preparation program, during sample preparation, only need call corresponding program and can accomplish kind process of cutting by control instrument; (4) can adopt the distinct cutting cutter, cooperate the distinct cutting mode, can the soil body of different structure be cut.
Description of drawings
Fig. 1 is the cut kind appearance structural representation of triaxial test with original state loess sample that be used to prepare of the present invention;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the vertical view of Fig. 1;
Label among the figure is represented respectively: 1, direct current generator, 2, telescopic push rod, 3, coupling shaft, 4, top board, 5, go up cutting soil disk; 6, column, 7, cut native knife rest, 8, linear electric motors, 9, guide rail, 10, cutting soil disk down; 11, synchronous motor, 12, support, 13, Hall switch, 14, base plate.
Below in conjunction with accompanying drawing and principle of work the present invention is done further explain.
Embodiment
Referring to accompanying drawing 1, of the present inventionly be used to prepare the cut kind appearance of triaxial test with original state loess sample, comprise support 12; Base plate 14 is arranged on the support 12; Synchronous motor 11 is installed below base plate 14, and base plate 14 is provided with down cutting soil disk 10, and this time cutting soil disk 10 is by synchronous motor 11 driven rotary; On base plate 14, be distributed with support post 6, top board 4 is arranged on the support post 6, coupling shaft 3 is installed on top board 4, have on the coupling shaft 3 and the following cutting soil disk 10 corresponding cutting soil disks 5 of going up; Also has telescopic push rod 2 on the top board 4; Above telescopic push rod 2, be provided with direct current generator 1; Native knife rest 7 and linear electric motors 8 are cut in telescopic push rod 2 belows, cut to be equipped with on the native knife rest 7 and cut native cutter, and linear electric motors 8 drive cuts the to-and-fro movement on guide rail 9 of native knife rest 7.
Telescopic push rod 2 range 250mm.
Support post 6 has three, and between top board 4 and floor 14, the angle between the support post 6 is 120 °.Support post 6 highly is 250mm, can satisfy multiple sample dimensions requirement.To cut the position that native knife rest 7 moves in order controlling, a pair of Hall switch 13 to be arranged on the support post 6, through the displacement of the telescopic push rod 2 of Hall switch 13 restrictions.
Coupling shaft 3 can rotate through bearing, also can move up and down.
Last cutting soil disk 5 has locking pin with following cutting soil disk 10, fixedly soil sample.
Following cutting soil disk 10 and base plate 14 adopts the bearing of sealing to be connected, and following cutting soil disk 10 and stepper motor 11 are connected through shaft coupling.
Linear electric motors 8 can be controlled the position of cutting native knife rest 7 accurately, and knife rest can be installed the different native cutter heads of cutting, to adapt to different soil nature.When loess is comparatively hard, can select the twolip rotating knife; When loess is comparatively soft, can directly install and board-likely cut native cutter and cut.The control of instrument can manually be controlled down cutting soil disk 10 and rotate, cuts native knife rest 7 and move up and down, cut native swivel and move, move forward and backward, and also can adopt programme controlled mode to realize cutting automatically soil.
Mention coupling shaft 3 during use earlier, soil sample is placed between the upper and lower cutting soil disk (5,10) gently, put down axle and connect 3, lean on the gravity of coupling shaft 3 that soil sample is clamped, the fixed screw on the fixed connection shaft 3 can only rotate coupling shaft 3, can not move up and down.According to the soil sample height, native knife rest 7 motion height are cut with control in the position of adjustment Hall switch 13.
Open the control power supply, press program pushbutton, the soil sample size as requested and the character of soil sample through the executive routine of selecting to have stored, are carried out the native task of cutting according to preset program.Task is finished, and cuts native knife rest 7 and gets back to the initial position of program automatically.
Following inventor provides some typical control programs:
(1) certain loess appearance, water percentage 6.3%-6.8%, harder, adopt and cut relatively difficulty of the manual sample preparation of native cutter, therefore carry out sample preparation on kind appearance of the present invention cutting.The programmed control flow process is following:
A) cutting installation twolip rotating knife on the native knife rest 7, dress appearance, start-up routine;
B) direct current generator 1 starts, and telescopic push rod 2 drives are cut native knife rest 7 and moved upward with linear electric motors 8, and when arriving the soil sample top, top Hall switch 13 sends signal;
C) telescopic push rod 2 stop motions, stepper motor 11 drive 20 ° of cutting soil disk 10 rotations;
D) direct current generator 1 starts, and telescopic push rod 2 drives and moves downward, and when arriving the soil sample bottom, bottom Hall switch 13 sends signal;
E) telescopic push rod 2 stop motions, stepper motor 11 drive 20 ° of cutting soil disk 10 rotations down;
F) repeat b) ~ e) step action 9 times, i.e. cutting soil disk (5,10) rotation 1 circle up and down, linear electric motors 8 drive cuts native knife rest 7 and the twolip rotating knife 5mm that travels forward;
G) repeat above action, when the soil sample diameter reaches preset 50mm, stop to cut the soil action, cut native knife rest 7 and get back to the initial position of program automatically.
(2) certain loess appearance, water percentage 10.3% ~ 11.0%, more loose, therefore select knife rest upper mounting plate formula to cut native cutter sample preparation.The programmed control flow process is following:
A) board-likely cut native cutter and be fixed on and cut on the native knife rest 7, dress appearance, start-up routine;
B) direct current generator 1 starts, and telescopic push rod 2 drives are cut native knife rest 7 and moved upward with linear electric motors 8, and when arriving the soil sample top, top Hall switch 13 sends signal;
C) telescopic push rod 2 stop motions, stepper motor 11 drive 20 ° of cutting soil disk 10 rotations;
D) telescopic push rod 2 stop motions are cut native knife rest 7 and are moved downward, and when arriving the soil sample bottom, bottom Hall switch 13 sends signal;
E) telescopic push rod 2 stop motions, stepper motor 11 drive 20 ° of cutting soil disk 10 rotations down;
F) repeat b) ~ e) step action 9 times, i.e. cutting soil disk (5,10) rotation 1 circle up and down, linear electric motors 8 drive cuts native knife rest 7 and the board-like native cutter 5mm that travels forward that cuts;
G) repeat above action, when the soil sample diameter reaches preset 50mm, stop to cut the soil action, cut native knife rest 7 and get back to the initial position of program automatically.
Of the present inventionly be used to prepare the cut kind appearance of triaxial test, when sample preparation, can control the size of sample accurately, and automaticity be higher, and can improve the efficient of sample preparation with original state loess sample.

Claims (10)

1. one kind is used to prepare the cut kind appearance of triaxial test with original state loess sample; Comprise support (12); Base plate (14) is arranged on the support (12), it is characterized in that, synchronous motor (11) is installed in base plate (14) below; Base plate (14) is provided with down cutting soil disk (10), and this time cutting soil disk (10) is by synchronous motor (11) driven rotary; On base plate (14), be distributed with support post (6), top board (4) is arranged on the support post (6), coupling shaft (3) is installed on top board (4), have on the coupling shaft (3) and the corresponding cutting soil disk (5) of going up of following cutting soil disk (10); Also has telescopic push rod (2) on the support (12); Be provided with direct current generator (1) in telescopic push rod (2) top; Native knife rest (7) and linear electric motors (8) are cut in telescopic push rod (2) below; Cut to be equipped with on the native knife rest (7) and cut native cutter, linear electric motors (8) drive cuts native knife rest (7) in upward to-and-fro movement of guide rail (9).
2. as claimed in claim 1ly be used to prepare the cut kind appearance of triaxial test, it is characterized in that a pair of Hall switch (13) is arranged on the described support post (6) with original state loess sample.
3. as claimed in claim 1ly be used to prepare the cut kind appearance of triaxial test with original state loess sample, it is characterized in that described support post (6) has three, the angle between the support post (6) is 120 °.
4. describedly be used to prepare the cut kind appearance of triaxial test like claim 1,2 or 3, it is characterized in that described support post (6) highly is 250mm with original state loess sample.
5. as claimed in claim 1ly be used to prepare the cut kind appearance of triaxial test, it is characterized in that described coupling shaft (3) can rotate through bearing, also can move up and down with original state loess sample.
6. as claimed in claim 1ly be used to prepare the cut kind appearance of triaxial test, it is characterized in that, describedly go up cutting soil disk (5) and following cutting soil disk (10) has locking pin with original state loess sample.
7. as claimed in claim 1ly be used to prepare the cut kind appearance of triaxial test with original state loess sample, it is characterized in that, described to cut native cutter be that twolip rotating knife or board-like is cut native cutter.
8. as claimed in claim 1ly be used to prepare the cut kind appearance of triaxial test, it is characterized in that the range of described telescopic push rod (2) is 250mm with original state loess sample.
9. as claimed in claim 1ly be used to prepare the cut kind appearance of triaxial test, it is characterized in that described cutting soil disk (10) down adopts the bearing that seals to be connected with base plate (14) with original state loess sample.
10. as claimed in claim 1ly be used to prepare the cut kind appearance of triaxial test, it is characterized in that described cutting soil disk (10) down is connected through shaft coupling with synchronous motor (11) with original state loess sample.
CN2011100241409A 2011-01-21 2011-01-21 Sample cutter for preparing undisturbed loess sample for triaxial test Expired - Fee Related CN102169062B (en)

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CN103196699A (en) * 2013-03-28 2013-07-10 北京交通大学 Static cutting table for frozen earth
CN103558054B (en) * 2013-11-17 2016-03-23 吉林大学 Full-automatic rotating thin wall-type soil-cutter
CN103900877B (en) * 2014-03-21 2017-01-11 浙江水利水电学院 Preparation device for three-axis compression test original-state sample and preparation method of preparation device
CN105300756B (en) * 2015-09-18 2017-11-14 西安建筑科技大学 A kind of devices and methods therefor for the sample preparation for directly testing loess tensile strength
CN106596219B (en) * 2016-11-30 2019-06-11 同济大学 A kind of electronic triaxial test soil sample cuts earthenware
CN106644633A (en) * 2016-12-01 2017-05-10 吉林大学 Multifunctional geo-technical testing sample cutting device
CN106680055B (en) * 2017-03-03 2023-11-28 天津城建大学 Multifunctional soft clay hollow cylinder sample preparation device and sample preparation method
CN107367412B (en) * 2017-07-04 2019-11-19 山东大学 Sample preparation and sampling combination unit and method suitable for soil test standard sample
CN107367414B (en) * 2017-07-26 2023-06-02 中原工学院 Hard clay undisturbed triaxial sample preparation device and application method thereof
CN107328626B (en) * 2017-08-07 2019-11-05 南京铁道职业技术学院 Twin shaft cuts more size soil-cutters
CN107991157B (en) * 2017-12-30 2023-10-20 浙江大学 Full-automatic triaxial soil sample cutting device with arbitrary diameter
CN108458905B (en) * 2018-02-05 2024-03-26 浙江大学 Semi-automatic hollow cylinder soil sample making devices
CN109060467B (en) * 2018-06-15 2021-02-26 绍兴文理学院 Over-and-under type original state soil triaxial sample system appearance ware
CN109342148A (en) * 2018-12-12 2019-02-15 安徽理工大学 A kind of three axis sample preparations stirring throwing hair device
CN111307553B (en) * 2020-04-13 2024-04-12 吉林大学 Triaxial sample soil cutter and application method thereof
CN114018670A (en) * 2021-11-09 2022-02-08 广西北投交通养护科技集团有限公司 Intelligent soil cutting device for geotechnical triaxial test and sample preparation method

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CN101629874A (en) * 2009-08-03 2010-01-20 湖南大学 Concrete cut sampling machine

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CN2935121Y (en) * 2006-04-27 2007-08-15 中国科学院武汉岩土力学研究所 Geotechnical triaxial test sample-cutting device
CN101629874A (en) * 2009-08-03 2010-01-20 湖南大学 Concrete cut sampling machine

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Application publication date: 20110831

Assignee: Xi'an Northwest University Technology Engineering Research Institute Co., Ltd.

Assignor: Northwest University

Contract record no.: 2013610000050

Denomination of invention: Sample cutter for preparing undisturbed loess sample for triaxial test

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