CN203083892U - Stress-strain control type direct shear apparatus - Google Patents
Stress-strain control type direct shear apparatus Download PDFInfo
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- CN203083892U CN203083892U CN 201320075952 CN201320075952U CN203083892U CN 203083892 U CN203083892 U CN 203083892U CN 201320075952 CN201320075952 CN 201320075952 CN 201320075952 U CN201320075952 U CN 201320075952U CN 203083892 U CN203083892 U CN 203083892U
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Abstract
The utility model provides a stress-strain control type direct shear apparatus comprising a square shear box. The square shear box is formed by an upper shear box and a lower shear box and is used for containing a rock soil body test sample; a vertical pressure loading mechanism for supplying a vertical load to the rock soil body test sample is arranged at the upper end of the upper shear box; one end of the lower shear box is matched with a horizontal shear loading mechanism for a stress control type direct shear test, and the other end of the lower shear box is matched with a horizontal loading mechanism for a strain control type direct shear test; and the horizontal loading mechanism comprises a torque conversion box on a test platform and a horizontal load tension and pressure sensor which is connected with the torque conversion box and the lower shear box respectively. The stress-strain control type direct shear apparatus provided by the utility model not only can be used for carrying out the stress control type direct shear test and the strain control type direct shear test, has the advantages of simple structure and low machining cost, and is easy to popularize and apply in production and teaching.
Description
Technical field
The utility model belongs to the Geotechnical Engineering field, is specifically related to a kind of direct shear apparatus, and particularly a kind of ess-strain is controlled multi-functional direct shear apparatus.
Background technology
Direct shear apparatus is a kind of testing equipment the most conventional in the soil test, is mainly used in to measure the shear strength parameter of rock soil mass under static load conditions.The unstability overwhelming majority of rock soil mass is caused by shear failure, the unstable failure of Geotechnical Engineering all is accompanied by the development of shear displacemant, therefore, by applying shearing force or controlling shear displacemant rock soil mass is tested, the shear strength parameter of accurately measuring rock soil mass is significant in Geotechnical Engineering is built, and direct shear test then is a kind of important research technique.
Direct shear test is that theoretical foundation development comes, the earliest and the test method of the most direct mensuration rock soil mass shearing strength with the Coulomb theory.Test can be divided into two kinds of Stress Control formula and strain control type, Stress Control formula direct shear test is that soil sample is packed in the shear box, when soil sample being applied pressure at right angle by increased pressure board, sample is applied constant horizontal shear force, measure its relevant shear displacement, be used for creep test, measure the long-term strength of soil; Strain control type direct shear test then is when soil sample is applied pressure at right angle, shears by constant rate of speed, measures its corresponding horizontal shear stress, is used to measure the conventional shear resistance of soil.
At present both at home and abroad common a kind of of direct shear apparatus be single box direct shear apparatus, and another kind is cut for tetrad, and leverage is all adopted in applying of two kinds of direct shear apparatus vertical loads.Find that in process of the test lever has taken place to tilt largely after applying counterweight, the institute adds load, and high spud angle is big more more, and maximum has reached 30 °, makes practical function reduce greatly in the pressure of sample, as seen adopts the loss of leverage loading power bigger.In addition, the shear box specification is single, especially domestic usefulness mostly be circular shear box, size is less, the stress concentration phenomenon is comparatively serious, makes sample be in the uneven state of stress distribution in entire test, along with the generation of shear displacemant always, the inhomogeneous of this stress distribution also can strengthen, and influences test result.
The utility model content
The purpose of this utility model is to provide a kind of ess-strain control type direct shear apparatus.
This direct shear apparatus comprises test platform and is arranged at down cut box on the test platform, the down cut box is provided with shear box, on, the down cut box-like becomes to hold the square shear box of rock soil mass sample, last shear box is provided with the pressure at right angle loading mechanism that is used for applying to the rock soil mass sample vertical load, one end of down cut box matches with the horizontal shear loading mechanism that is used for Stress Control formula direct shear test, the other end matches with the horizontal loading mechanism that is used for strain control type direct shear test, described horizontal loading mechanism comprises goes through torque conversion case that is arranged on the test platform and the horizontal loading pull pressure sensor that links to each other respectively with goes through torque conversion case and down cut box, the goes through torque conversion case comprises tooth bar, gear, with coaxial worm gear that is connected of gear and the worm screw that cooperates with worm gear, one end of tooth bar matches with gear, the other end links to each other with the down cut box, and test platform is provided with the shearing servomotor that is used to drive worm screw.
Described direct shear apparatus also comprises bracing frame and the crossbeam that links to each other with bracing frame, and test platform is arranged on the bracing frame.
Described two edges, bottom of going up shear box are provided with V-type groove under the last shear box consistent with the shear displacemant direction, two edges, top of down cut box are provided with V-type groove on the down cut box corresponding with V-type groove under the last shear box, test platform is provided with the test platform V-type groove consistent with the shear displacemant direction, and two edges, bottom of down cut box are provided with V-type groove under the down cut box that cooperates with test platform V-type groove.
Described test platform V-type groove is more than 2.
The inner box that described down cut box comprises water storage case and is fixed in an end in the water storage case, the V-type groove is arranged at the upper edge edge of inner box on the down cut box, and the height of water storage case is greater than inner box.
Described pressure at right angle loading mechanism comprises the add gland relative with last shear box, the upper end that adds gland links to each other with the lower end of vertical load pull pressure sensor, the upper end of vertical load pull pressure sensor links to each other with the upper end of vertical load pressurization cross bar, the lower end of vertical load pressurization cross bar links to each other with the vertical loading pulley blocks that is arranged at the test platform lower end, vertical loading pulley blocks comprises the pressure at right angle loading mechanism's running block that links to each other with the lower end of vertical load pressurization cross bar and the pressure at right angle loading mechanism fixed pulley group that links to each other with pressure at right angle loading mechanism running block, and vertically the loading pulley blocks links to each other with the vertical loading counterweight that is arranged at the test platform lower end.
Described pressure at right angle loading mechanism's running block and vertical load pressurization cross bar adopt the some connected mode.
Described horizontal shear loading mechanism comprises shearing loading pulley blocks that is arranged at the test platform lower end and the horizontal loading counterweight that links to each other with shearing loading pulley blocks, and shearing loading pulley blocks comprises the horizontal shear loading mechanism's running block that links to each other with the down cut box and the horizontal shear loading mechanism fixed pulley group that links to each other with horizontal shear loading mechanism running block.
Described direct shear apparatus also comprises the strain control electrical screen that is arranged on the test platform, and the vertical load pull pressure sensor links to each other with strain control electrical screen respectively with the horizontal loading pull pressure sensor, and strain control electrical screen links to each other with the shearing servomotor.
Described goes through torque conversion case is many groups, is provided with the disconnected formula bearing that is used to connect adjacent worm screw between the goes through torque conversion case.
The beneficial effects of the utility model are embodied in: direct shear apparatus described in the utility model is a kind of multi-functional direct shear apparatus, by horizontal loading mechanism being set and horizontal shear loading mechanism both can carry out strain control type direct shear test on an instrument, can carry out Stress Control formula direct shear test again; Each parts all adopts mechanical connection in the direct shear apparatus described in the utility model, and is simple in structure, processing cost is low, and is easy to use, especially conveniently carries out the maintenance and the replacing of parts, provides convenience for saving use cost, be easy to produce and teaching in apply.
Direct shear apparatus described in the utility model is by being provided with a plurality of test platform V-type grooves, can select for use the square shear box of different size to test, by using larger-size square shear box, well improved the small sample shear stress and concentrated and the uneven problem of stress distribution, the test figure that records can reflect shear strength of soils more realistically; Simultaneously can also carry out a plurality of (such as two) sample, effectively eliminate because the error that the difference of instrument causes to test findings with the shear test under the equal pressure.
The down cut box of direct shear apparatus described in the utility model comprises water storage case, can be used as tank, has guaranteed that the saturated sample shear surface keeps state of saturation in shear history, has effectively prevented owing to water evaporates, the sample shearing strength that causes that becomes dry increases.
Pressure at right angle loading system and horizontal shear loading system have been abandoned existing lever load maintainer in the direct shear apparatus described in the utility model, adopt the more reliable pulley blocks of serviceability mechanism load application, and is furnished with S type pull pressure sensor, can record the true pressure and the shearing that act on sample, effectively eliminate because the loading loss that lever tilts to cause.And the pulley blocks mechanism principle is simple, and structure is more flexible, can select enlargement factor according to demand in the process of the test, satisfies different engineering demands easilier.
Direct shear apparatus described in the utility model adopts servomotor that different shear rates is provided, and introduced strain and controlled electrical screen, make test operation more easy, selected for use the formula bearing that can disconnect to connect simultaneously between the goes through torque conversion case, can select the goes through torque conversion case according to demand for use during test, no cut cells can reach by the connection of throwing off bearing and quit work, and has at utmost reduced the wearing and tearing of instrument.
Description of drawings
Fig. 1 is the structural representation of ess-strain control type direct shear apparatus described in the utility model;
Fig. 2 is a square shear box wiring layout described in the utility model;
Fig. 3 is a down cut box detail view described in the utility model;
Fig. 4 is pressure at right angle loading mechanism's running block described in the utility model and vertical load pressurization cross bar connection layout;
Fig. 5 is the utility model formula bearing jointing structure figure that can disconnect;
Among the figure: the 1-bracing frame; The 2-crossbeam; The 3-test platform; 4-first fixed pulley, 5-second fixed pulley; 6-the 3rd fixed pulley; The 7-first test platform V-type groove; The 8-second test platform V-type groove; 9-the 3rd test platform V-type groove; 10-the 4th test platform V-type groove; 11-the 5th test platform V-type groove; 12-the 6th test platform V-type groove; 13-down cut box; The last shear box of 14-; 15-adds gland; 16-vertical load pull pressure sensor; 17-vertical load pressurization cross bar; The 18-first goes through torque conversion case; The 19-second goes through torque conversion case; 20-strain control electrical screen; 21-the 3rd goes through torque conversion case; 22-shears servomotor; 23-horizontal loading pull pressure sensor; 24-pressure at right angle loading mechanism running block; 25-pressure at right angle loading mechanism fixed pulley group; The vertical loading counterweight of 26-; The horizontal loading counterweight of 27-; 28-horizontal shear loading mechanism fixed pulley group; 29-horizontal shear loading mechanism running block; The 30-inner box; The 31-water storage case; The 32-pin; The 33-formula bearing that can disconnect.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Referring to Fig. 1-Fig. 3, this direct shear apparatus comprises test platform 3 and is arranged at down cut box 13 on the test platform 3, and down cut box 13 is provided with shear box 14, and upper and lower shear box forms the square shear box that holds the rock soil mass sample; Described two edges, bottom of going up shear box 14 are provided with V-type groove under the last shear box consistent with the shear displacemant direction, two edges, top of down cut box 13 are provided with V-type groove on the down cut box corresponding with V-type groove under the last shear box, test platform 3 is provided with the test platform V-type groove consistent with the shear displacemant direction, two edges, bottom of down cut box 13 are provided with V-type groove under the down cut box that cooperates with test platform V-type groove, and described test platform V-type groove is more than 2; The inner box 30 that described down cut box 13 comprises water storage case 31 and is fixed in an end in the water storage case 31, the V-type groove is arranged at the upper edge edge of inner box 30 on the down cut box, and the height of water storage case 31 is greater than inner box 30; Last shear box 14 is provided with the pressure at right angle loading mechanism that is used for applying to the rock soil mass sample vertical load, one end of down cut box 13 matches with the horizontal shear loading mechanism that is used for Stress Control formula direct shear test, the other end matches with the horizontal loading mechanism that is used for strain control type direct shear test, described horizontal loading mechanism comprises goes through torque conversion case that is arranged on the test platform 3 and the horizontal loading pull pressure sensor 23 that links to each other respectively with goes through torque conversion case and down cut box, the goes through torque conversion case comprises tooth bar, gear, with coaxial worm gear that is connected of gear and the worm screw that cooperates with worm gear, one end of tooth bar matches with gear, the other end links to each other with the down cut box, test platform 3 is provided with the shearing servomotor 22 that is used to drive worm screw, and the power of shearing servomotor is converted to the rectilinear motion of down cut box by worm and gear assembly and rack and pinion assembly; Described direct shear apparatus also comprises bracing frame 1 and the crossbeam 2 that links to each other with bracing frame 1, and test platform 3 is arranged on the bracing frame 1.
Described pressure at right angle loading mechanism comprises relative with last shear box 14 gland 15 that adds, the upper end that adds gland 15 links to each other with the lower end of vertical load pull pressure sensor 16, the upper end of vertical load pull pressure sensor 16 links to each other with the upper end of vertical load pressurization cross bar 17, the lower end of vertical load pressurization cross bar 17 links to each other with the vertical loading pulley blocks that is arranged at test platform 3 lower ends, vertical loading pulley blocks comprises the pressure at right angle loading mechanism running block 24 that links to each other with the lower end of vertical load pressurization cross bar 17 and the pressure at right angle loading mechanism fixed pulley group 25 that links to each other with pressure at right angle loading mechanism running block 24, and vertically the loading pulley blocks links to each other with the vertical loading counterweight 26 that is arranged at test platform 3 lower ends; Described pressure at right angle loading mechanism's running block 24 and vertical load pressurization cross bar 17 adopt some connected modes (referring to Fig. 4).
Described horizontal shear loading mechanism comprises shearing loading pulley blocks that is arranged at test platform 3 lower ends and the horizontal loading counterweight 27 that links to each other with shearing loading pulley blocks, and shearing loading pulley blocks comprises the horizontal shear loading mechanism running block 29 that links to each other with down cut box 13 and the horizontal shear loading mechanism fixed pulley group 28 that links to each other with horizontal shear loading mechanism running block 29; Described direct shear apparatus also comprises the strain control electrical screen 20 that is arranged on the test platform 3, vertical load pull pressure sensor 16 links to each other with the data acquisition card that strain is controlled in the electrical screen 20 respectively with horizontal loading pull pressure sensor 23, finish the signal transmission, and finish data processing and demonstration by built-in data processing software, strain control electrical screen 20 with shear servomotor 22 and link to each other; Described goes through torque conversion case is many groups, is provided with between the goes through torque conversion case to be used to connect the disconnected formula bearing 33(of adjacent worm screw referring to Fig. 5).
Principle of work
At first lay shear box on the test platform V-type groove of correspondence before the test by demand, then the sample that makes is packed in the square shear box, be provided with the V-type groove with corresponding to two limits of shear displacemant direction in the contact edge of upper and lower shear box, ball is housed in the groove, begins sample is applied vertical load after the dress sample is finished.At first will add gland aligns and is positioned on the sample, the vertical load cross bar 17 that pressurizes is aligned to place and adds on the gland 15, the load transfer device installation, the loading of pressure is mainly finished by pulley blocks, i.e. pressure at right angle loading mechanism running block 24 and pressure at right angle loading mechanism fixed pulley group 25.After vertical pressurization is finished, if what carry out is Stress Control formula direct shear test, the same with vertical compression system principle, the same gravity amplification several times of using pulley blocks mechanism with counterweight, after-applied in the down cut box, note the shear displacemant of shear box under the effect of each grade horizontal shear, reach shear failure until soil sample.If what carry out is strain control type direct shear test, open strain control electrical screen 20, after selecting needed shear rate on the screen, click beginning, shear servomotor and drive the worm screw rotation, by worm gear with transmission of power give with the coaxial rack and pinion assembly that is connected of worm gear in gear, the wheel and rack engagement promotes the down cut box, and recording level load pull pressure sensor 23 readings of surveying finish test after the soil sample generation shear failure.
Embodiment
A kind of ess-strain is controlled multi-functional direct shear apparatus, and this instrument mainly is made up of testing table, strain control system, pressure at right angle loading system, horizontal shear loading system and measurement system.As shown in fig. 1, comprise bracing frame 1, be used to support testing table, keep the stable of whole instrument; Crossbeam 2 mainly plays reinforcement effect, and provides the installation site for the fixed pulley in the pulley blocks loading system; The platform that provides of the installation of shear box and test is provided testing table; First fixed pulley 4, second fixed pulley 5 and the 3rd fixed pulley 6 are used to change the shearing direction, and wherein first fixed pulley 4, the 3rd fixed pulley 6 are used for the square shear box of 10cm * 10cm, and second fixed pulley 5 is used for the square shear box of 20cm * 20cm; The first test platform V-type groove 7, the second test platform V-type groove 8, the 3rd test platform V-type groove 9, the 4th test platform V-type groove 10, the 5th test platform V-type groove 11 and the 6th test platform V-type groove 12, be used to lay shear box, test the supporting ball of laying in the time slot, both played the guide rail effect, reduced the friction of down cut box and test platform again, the first test platform V-type groove 7 wherein, the 3rd test platform V-type groove 9, the 4th test platform V-type groove 10, the 6th test platform V-type groove 12 is used for the square shear box of 10cm * 10cm, the second test platform V-type groove 8, the 5th test platform V-type groove 11 is used for the square shear box of 20cm * 20cm; Down cut box 13 and last shear box 14 are used to install sample; Add gland 15, be used for pressure at right angle is passed to sample; Vertical load pull pressure sensor 16 is used for the actual pressure at right angle that the determination test process acts on sample; Vertical load pressurization cross bar 17, cross bar herein mainly are the pressure at right angle that pulley blocks amplifies to be delivered to add gland; The first goes through torque conversion case 18, the second goes through torque conversion case 19 and the 3rd goes through torque conversion case 21, built-in worm-and-wheel gear, be used for and pass to the down cut box after the rotating speed change direction of shearing servomotor 22 outputs, wherein the first goes through torque conversion case 18, the 3rd goes through torque conversion case 21 are used for the square shear box of 10cm * 10cm, and the second goes through torque conversion case 19 is used for the square shear box of 20cm * 20cm; Strain control electrical screen 20 can be set shear rate and shear displacemant when testing on this electrical screen; Shear servomotor 22, for system provides power source, the control shear rate; Horizontal loading pull pressure sensor 23 is used for the shearing that the determination test process acts on sample; Pressure at right angle loading mechanism running block 24 has been formed the pressure at right angle loading system jointly with pressure at right angle loading mechanism fixed pulley group 25, the gravity of vertical loading counterweight 26 can be amplified five to 15 times; Horizontal shear loading mechanism fixed pulley group 28 has been formed the shearing loading system jointly with horizontal shear loading mechanism running block 29, the gravity of horizontal loading counterweight 27 can be amplified five times.
This instrument can utilize undisturbed soil sample, the remoulded sample at the scene of taking to carry out Stress Control formula direct shear test and strain control type direct shear test, and before test, can select for use the square shear box of a 10cm * 10cm or 20cm * 20cm to test by the test design demand, the square shear box that also can choose two 10cm * 10cm carries out with the stage pressure parallel experiment, in the hope of obtaining test figure more accurately.
At first lay shear box before the test,, can be positioned in the first test platform V-type groove 7, the 3rd test platform V-type groove 9 if select for use the square shear box of a 10cm * 10cm to test by demand; Select the square shear box of a 20cm * 20cm for use, should be positioned in the second test platform V-type groove 8, the 5th test platform V-type groove 11; If select the square shear box of two 10cm * 10cm for use, should be positioned in the groove first test platform V-type groove 7, the 3rd test platform V-type groove 9, the 4th test platform V-type groove 10, the 6th test platform V-type groove 12, ball all is housed, in the square shear box of then sample that makes being packed in each groove.Square shear box is made up of down cut box 13 and last shear box 14, is provided with the V-type groove with corresponding to two limits of shear displacemant direction in the contact edge of upper and lower shear box, and ball is housed in the groove, and square shear box assembling as shown in Figure 2.For down cut box 13, adopted and outside single shear box, added a rectangle stainless steel box again, this stainless steel box is than the high about 1cm of shear box of the inside, be mainly used in and when measuring saturated soil sample shear strength parameter, add water, keep the water percentage of shear surface soil sample between shear box up and down, making measured result is truly saturated soil sample shearing strength.Consider that simultaneously upper and lower shear box can produce a relative displacement in shear history, the outer set stainless steel box of down cut box, one side and down cut box that it is opposite with the shear displacemant direction are bigger with the distance between the limit, be about 2 times of general shear destroy displacement, the details of down cut box as shown in Figure 3.
After finishing, the dress sample begins sample is applied vertical load.The applying of vertical load relates generally to and adds gland 15, vertical load pull pressure sensor 16, vertical load pressurization cross bar 17, pressure at right angle loading mechanism running block 24, pressure at right angle loading mechanism fixed pulley group 25 and vertical loading counterweight 26.At first will add gland 15 aligns and is positioned on the sample, can not contact with square shear box wall, vertical load pull pressure sensor 16 is an one with vertical load pressurization cross bar 17, the vertical load cross bar 17 that pressurizes is aligned to place and adds on the gland 15, the installation of charger is carried out in the load transfer device installation then.The loading of pressure is mainly finished by pulley blocks, i.e. pressure at right angle loading mechanism running block 24 and pressure at right angle loading mechanism fixed pulley group 25.Different with traditional pulley blocks mechanism, the utility model places travelling block on the fixed pulley, can make institute add load changes at double, and consider the convenience of test operation, pressure at right angle loading mechanism running block 24 adopts the some connected mode with vertical load pressurization cross bar 17, as shown in Figure 4, this design helps the balance of vertical load pressurization cross bar 17.Compare with the leverage loading, pulley blocks loads more reliable, and can adjust the enlargement factor of power according to demand, and better flexibility is arranged.
After vertical pressurization is finished, be Stress Control formula direct shear test, next will use the horizontal shear loading system, relate to horizontal loading counterweight 27, horizontal shear loading mechanism fixed pulley group 28 and horizontal shear loading mechanism running block 29 as if what carry out.The same with vertical compression system principle, the horizontal shear loading system is used the gravity amplification several times of pulley blocks mechanism with counterweight equally, and is after-applied in the down cut box.Simultaneously, be equipped with dial gauge and note the shear displacemant of shear box under the effect of each grade horizontal shear, reach shear failure until soil sample.
After vertical pressurization is finished, if what carry out is strain control type direct shear test, what use then is the strain control system, relates to the first goes through torque conversion case 18, the second goes through torque conversion case 19, the 3rd goes through torque conversion case 21, strain control electrical screen 20, shears servomotor 22, horizontal loading pull pressure sensor 23.When testing, only need to open strain control electrical screen 20 after connecting power supply, click begins to get final product after selecting needed shear rate on the screen.Connection between the relevant herein first goes through torque conversion case 18, the second goes through torque conversion case 19 and the 3rd goes through torque conversion case 21 has selected for use the formula bearing that can disconnect to connect, and can connect according to demand during test or goes through torque conversion case separately, and its syndeton as shown in Figure 5.Simultaneously, recording level load pull pressure sensor 23 readings of surveying finish test after the soil sample generation shear failure.
Claims (10)
1. ess-strain control type direct shear apparatus, it is characterized in that: this direct shear apparatus comprises test platform (3) and is arranged at down cut box (13) on the test platform (3), down cut box (13) is provided with shear box (14), on, the down cut box-like becomes to hold the square shear box of rock soil mass sample, last shear box (14) is provided with the pressure at right angle loading mechanism that is used for applying to the rock soil mass sample vertical load, one end of down cut box (13) matches with horizontal shear loading mechanism, the other end matches with horizontal loading mechanism, described horizontal loading mechanism comprises goes through torque conversion case that is arranged on the test platform (3) and the horizontal loading pull pressure sensor (23) that links to each other respectively with goes through torque conversion case and down cut box (13), the goes through torque conversion case comprises tooth bar, gear, with coaxial worm gear that is connected of gear and the worm screw that cooperates with worm gear, one end of tooth bar matches with gear, the other end links to each other with the down cut box, and test platform (3) is provided with the shearing servomotor (22) that is used to drive worm screw.
2. according to the described a kind of ess-strain control type direct shear apparatus of claim 1, it is characterized in that: described direct shear apparatus also comprises bracing frame (1) and the crossbeam (2) that links to each other with bracing frame (1), and test platform (3) is arranged on the bracing frame (1).
3. according to the described a kind of ess-strain control type direct shear apparatus of claim 1, it is characterized in that: described two edges, bottom of going up shear box (14) are provided with V-type groove under the last shear box consistent with the shear displacemant direction, two edges, top of down cut box (13) are provided with V-type groove on the down cut box corresponding with V-type groove under the last shear box, test platform (3) is provided with the test platform V-type groove consistent with the shear displacemant direction, and two edges, bottom of down cut box (13) are provided with V-type groove under the down cut box that cooperates with test platform V-type groove.
4. according to the described a kind of ess-strain control type direct shear apparatus of claim 3, it is characterized in that: described test platform V-type groove is more than 2.
5. according to the described a kind of ess-strain control type direct shear apparatus of claim 3, it is characterized in that: the inner box (30) that described down cut box (13) comprises water storage case (31) and is fixed in an end in the water storage case (31), the V-type groove is arranged at the upper edge edge of inner box (30) on the down cut box, and the height of water storage case (31) is greater than inner box (30).
6. according to the described a kind of ess-strain control type direct shear apparatus of claim 1, it is characterized in that: described pressure at right angle loading mechanism comprises relative with last shear box (14) gland (15) that adds, the upper end that adds gland (15) links to each other with the lower end of vertical load pull pressure sensor (16), the upper end of vertical load pull pressure sensor (16) links to each other with the upper end of vertical load pressurization cross bar (17), the lower end of vertical load pressurization cross bar (17) links to each other with the vertical loading pulley blocks that is arranged at test platform (3) lower end, vertical loading pulley blocks comprises pressure at right angle loading mechanism running block (24) that links to each other with the lower end of vertical load pressurization cross bar (17) and the pressure at right angle loading mechanism fixed pulley group (25) that links to each other with pressure at right angle loading mechanism running block (24), and vertical loading pulley blocks links to each other with the vertical loading counterweight (26) that is arranged at the test platform lower end.
7. according to the described a kind of ess-strain control type direct shear apparatus of claim 6, it is characterized in that: described pressure at right angle loading mechanism's running block (24) adopts the some connected mode with vertical load pressurization cross bar (17).
8. according to the described a kind of ess-strain control type direct shear apparatus of claim 6, it is characterized in that: described horizontal shear loading mechanism comprises shearing loading pulley blocks that is arranged at test platform (3) lower end and the horizontal loading counterweight (27) that links to each other with shearing loading pulley blocks, and shearing loading pulley blocks comprises horizontal shear loading mechanism running block (29) that links to each other with down cut box (13) and the horizontal shear loading mechanism fixed pulley group (28) that links to each other with horizontal shear loading mechanism running block (29).
9. described according to Claim 8 a kind of ess-strain control type direct shear apparatus, it is characterized in that: described direct shear apparatus also comprises the strain control electrical screen (20) that is arranged on the test platform (3), vertical load pull pressure sensor (16) links to each other with strain control electrical screen (20) respectively with horizontal loading pull pressure sensor (23), and strain control electrical screen (20) links to each other with shearing servomotor (22).
10. according to the described a kind of ess-strain control type direct shear apparatus of claim 1, it is characterized in that: described goes through torque conversion case is provided with the disconnected formula bearing (33) that is used to connect adjacent worm screw for many groups between the goes through torque conversion case.
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| CN 201320075952 CN203083892U (en) | 2013-02-18 | 2013-02-18 | Stress-strain control type direct shear apparatus |
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| CN 201320075952 CN203083892U (en) | 2013-02-18 | 2013-02-18 | Stress-strain control type direct shear apparatus |
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Cited By (7)
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| CN103134729A (en) * | 2013-02-18 | 2013-06-05 | 长安大学 | Stress-strain control type direct shear apparatus |
| CN104390858A (en) * | 2014-11-13 | 2015-03-04 | 常州大学 | Simple device of shear rheometer |
| CN106053253A (en) * | 2016-05-19 | 2016-10-26 | 同济大学 | Soil grasper measuring device for measuring real displacement of soil sheared by large size soil engineering direct shear apparatus |
| CN108663277A (en) * | 2017-12-31 | 2018-10-16 | 中交第公路工程局有限公司 | A kind of multigroup sample progress shear strength test device |
| CN110530724A (en) * | 2019-09-30 | 2019-12-03 | 兰州理工大学 | A kind of rock soil medium tensile-sbear strength method for testing and analyzing |
| CN113358493A (en) * | 2021-05-27 | 2021-09-07 | 西安石油大学 | Soil body shearing box, experiment system with same and method thereof |
| CN114486500A (en) * | 2022-02-25 | 2022-05-13 | 哈尔滨工业大学 | Concrete creep test device suitable for various stress combinations and test method thereof |
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2013
- 2013-02-18 CN CN 201320075952 patent/CN203083892U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103134729A (en) * | 2013-02-18 | 2013-06-05 | 长安大学 | Stress-strain control type direct shear apparatus |
| CN103134729B (en) * | 2013-02-18 | 2015-01-07 | 长安大学 | Stress-strain control type direct shear apparatus |
| CN104390858A (en) * | 2014-11-13 | 2015-03-04 | 常州大学 | Simple device of shear rheometer |
| CN106053253A (en) * | 2016-05-19 | 2016-10-26 | 同济大学 | Soil grasper measuring device for measuring real displacement of soil sheared by large size soil engineering direct shear apparatus |
| CN108663277A (en) * | 2017-12-31 | 2018-10-16 | 中交第公路工程局有限公司 | A kind of multigroup sample progress shear strength test device |
| CN108663277B (en) * | 2017-12-31 | 2021-08-31 | 中交一公局集团有限公司 | Shear strength test device is carried out to multiunit sample |
| CN110530724A (en) * | 2019-09-30 | 2019-12-03 | 兰州理工大学 | A kind of rock soil medium tensile-sbear strength method for testing and analyzing |
| CN113358493A (en) * | 2021-05-27 | 2021-09-07 | 西安石油大学 | Soil body shearing box, experiment system with same and method thereof |
| CN114486500A (en) * | 2022-02-25 | 2022-05-13 | 哈尔滨工业大学 | Concrete creep test device suitable for various stress combinations and test method thereof |
| CN114486500B (en) * | 2022-02-25 | 2023-11-10 | 哈尔滨工业大学 | Concrete creep test device suitable for various stress combinations and test method thereof |
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