CN109406268A - A kind of ess-strain control formula soil body test for tensile strength device and method - Google Patents
A kind of ess-strain control formula soil body test for tensile strength device and method Download PDFInfo
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- CN109406268A CN109406268A CN201811043614.2A CN201811043614A CN109406268A CN 109406268 A CN109406268 A CN 109406268A CN 201811043614 A CN201811043614 A CN 201811043614A CN 109406268 A CN109406268 A CN 109406268A
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- 239000002689 soil Substances 0.000 title claims abstract description 115
- 238000012360 testing method Methods 0.000 title claims abstract description 57
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- 238000012544 monitoring process Methods 0.000 claims abstract description 13
- 238000010998 test method Methods 0.000 claims abstract description 6
- 239000000523 sample Substances 0.000 claims description 81
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- 238000006073 displacement reaction Methods 0.000 claims description 27
- 239000002184 metal Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 239000003292 glue Substances 0.000 claims description 17
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- 238000009864 tensile test Methods 0.000 claims description 3
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 2
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- 239000004831 Hot glue Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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Abstract
The invention discloses the experimental rigs and method of a kind of ess-strain control formula soil body tensile strength, including Stress Control loading component, strain controlling loading component, lever transmission component, vertical soil sample tensile part, stress-strain monitoring component, base-plate, the present invention is able to achieve high-precision ess-strain control formula soil body test for tensile strength, realize two kinds of control modes, it only need to simply change the mould group of installation, and the ess-strain situation at each moment can be monitored, with flexible control loading, the characteristics of flexibly applying strain, it is provided for soil body test for tensile strength a kind of reliable, accurate experimental rig and test method, apparatus of the present invention have simple and compact for structure, it is easy to operate, convenient for promoting, Multifunctional integration, precision is high, feature low in cost, experimental rig and test method through the invention, it can be with Obtain the stress-strain relation during soil body tension, this has important directive significance for real engineering and scientific research.
Description
Technical field
The present invention relates to the experimental rigs and method of a kind of ess-strain control formula soil body tensile strength, belong to geotechnical engineering
Technical field.
Background technique
The test of soil strength has important directive significance, either base pit engineering, slope project to Practical Project also
It is in foundation engineering, the intensity of the soil body is all one of most informative design considerations；And the soil body is as a kind of the continuous of shot
Dielectric, compression strength and shearing strength are much higher than tensile strength, so in the test of soil strength, it can be common that the soil body
Compression strength and shearing strength test, the test apparatus of this respect is also very more, just has in the compressive strength test of the soil body
Unconfined compression strength test etc. then has direct shear test, triaxial shear test, simple shear test in the shear strength test of the soil body
Deng, in short, the compressive strength test of the soil body and the development of shear strength test are very mature, most of corresponding testing standard and
Specification is also approved by numerous scholars in the industry.However, the tensile strength of the soil body is often ignored by many people, so soil body tension
Strength test development is unlike mature or even relevant testing standard and specification be not yet as shear strength test for compression strength
It is as sound as a bell, but in actual geotechnical engineering problems, the tensile strength of the soil body sometimes plays leading role, such as
The problems such as tensile crack of roadbed, the development trend in slope instability crack, splitting of the water conservancy of high earth and rockfill dam, this is all anti-with the soil body
Tensile strength is closely related.Therefore develop and improve the experimental rig of soil body tensile strength and test method is very necessary
, this can play the role of further improving test soil mechanics.
Summary of the invention
One of goal of the invention is the provision of a kind of ess-strain control formula soil body test for tensile strength device, present invention dress
The strain set and can control high-precision stress, measure pinpoint accuracy, it is simple and compact for structure, it is easy to operate, it is the tension of the soil body
Strength test provides a kind of new approaches and new method.
The technical scheme is that
A kind of ess-strain control formula soil body test for tensile strength device, including the load of Stress Control loading component, strain controlling
Component, lever transmission component, vertical soil sample tensile part, stress-strain monitoring component, base-plate；
The lever transmission component includes two root posts I, transmission rod, bearing rod, two beckets, bearing (23), two S-shapeds extensions
I, two steel cable rope of hook；The bottom of the two root posts I is separately fixed on base-plate, and the top difference of two root posts I
Equipped with hole, the both ends of the bearing rod are each passed through the hole on I top of two root posts, and the both ends of bearing rod are secured with nuts respectively
In two root posts I, the middle part of the bearing rod passes through one end of bearing, the fixed company of the other end of bearing and the middle part of transmission rod
It connects, becket, one end of described two S-hooks I metal with both ends respectively are fixed in the bottom both ends of the transmission rod respectively
Ring connection, the other end of two S-hooks I are connect with one end of steel cable rope respectively；
The vertical soil sample tensile part includes top cover circular sleeve, bottom cover circular sleeve, two upright bars, I, two track, four
Fixed pulley；The bottom cover circular sleeve is half-headed sleeve, and the bottom surface of the bottom cover circular sleeve is fixed on base-plate,
Cylinder soil sample to be measured is placed in bottom cover circular sleeve, and the top cover circular sleeve is bottomless sleeve, the top cover circle set
Cylinder is mounted on the top of cylinder soil sample to be measured, and fixes a track on the two sides of top cover circular sleeve respectively, and described two vertical
Bar I is located at the two sides of bottom cover circular sleeve, and the bottom of two upright bars I is separately fixed on base-plate, and two upright bars I
Top two fixed pulleys are installed respectively, the side of two tracks is stuck in the slot of two fixed pulleys on two I top of upright bar
Interior, two fixed pulleys on two I tops of upright bar drive two tracks to move up and down respectively；
The stress-strain monitoring component includes laser displacement sensor, pull pressure sensor；The laser displacement sensor is logical
I top of upright bar that bracket is mounted on bottom cover circular sleeve side is crossed, the probe of laser displacement sensor is located at top cover circular sleeve
Top, and laser displacement sensor probe project light it is vertical with the top cover surface of top cover circular sleeve, the pressure
The bottom surface of sensor is fixed at the center of top cover circular sleeve, and the top of pull pressure sensor is equipped with metal hanging ring I, the gold
Belong to hanging ring I to connect with one end of S-hook II, the other end of S-hook II is another with the steel cable rope of transmission rod lower section side
End connection；
The Stress Control loading component includes water tank, water inlet pipe, outlet pipe, valve, more than one lantern ring；The water tank
Top is equipped with more than one lantern ring, and one above lantern ring is connect by rope with one end of S-hook III, and S-shaped is hung
The other end of hook III is connect with the other end of the steel cable rope of the other side below transmission rod, and the top of the water tank is equipped with water inlet pipe,
Water inlet pipe is equipped with inlet valve, and the bottom of water tank is equipped with outlet pipe, and outlet pipe is equipped with flowing water Valve, the side of the water tank
Level scale is indicated on cabinet；
The strain controlling loading component includes handwheel, threaded rod, two upright bars II, crossbeam, two nuts；Two upright bars
II bottom is each passed through the both ends of crossbeam and is fixed on base-plate, and the top of two upright bars II passes through nut respectively
It is fixed on crossbeam, hole is provided in the middle part of the crossbeam, the bottom of the threaded rod is in the hole at the middle part of crossbeam, crossbeam
Screw thread is carved in the hole in portion to be agreed with threaded rod, and threaded rod bottom and the center of handwheel connect, the top of the threaded rod
Metal hanging ring II is installed, II top of metal hanging ring is connect with one end of S-hook IV, the other end of S-hook IV and ten thousand
It is connected to one end of fastener, the other end of universal fastener is connect with the other end of the steel cable rope of the other side below transmission rod.
The length of the water inlet pipe is less than the side length of water tank.
The metal hanging ring II is mounted on the top of threaded rod in a welding manner.
The length of the track is 2 times of top cover circular sleeve height.
Four fixed pulleys are V-groove fixed pulley.
The bottom surface melt viscosity of the pull pressure sensor is at the center of top cover circular sleeve, the pressure sensing
Glue metal hanging ring in the top of device.
The laser displacement sensor, pull pressure sensor are connect with computer.
The second object of the present invention be to provide it is a kind of should stress-strain control formula soil body test for tensile strength device examination
Proved recipe method, the specific steps are as follows:
(1) if stress tension test is carried out, by vertical soil sample tensile part, stress-strain monitoring component, lever transmission portion
Part, Stress Control loading component are installed, and the cylinder soil sample made is put into the bottom cover circular sleeve for being coated with glue, then
The top cover circular sleeve for being coated with glue is sleeved on to the top of cylinder soil sample, load stretching then is carried out to soil sample, until soil sample
Until being pulled off destruction, or by the way that stress is arranged by after one of stress set of the time of cylinder soil sample to be measured holding, observe
The pulled condition of soil sample, during test, Optical displacement sensor, pull pressure sensor transfer data to computer and are divided
Analysis；
(2) if strained tensile test is carried out, by vertical soil sample tensile part, stress-strain monitoring component, lever transmission portion
Part, strain controlling loading component are installed, and the cylinder soil sample made is put into the bottom cover circular sleeve for being coated with glue, then
The top cover circular sleeve for being coated with glue is sleeved on to the top of cylinder soil sample, load stretching then is carried out to soil sample, until soil sample
Until being pulled off destruction, or by the way that strain is arranged by after one of strain set of the time of cylinder soil sample to be measured holding, observe
The pulled condition of soil sample, during test, Optical displacement sensor, pull pressure sensor transfer data to computer and are divided
Analysis.
The beneficial effects of the present invention are:
(1) the present invention provides a kind of ess-strain control formula soil body test for tensile strength device and test method, present invention dresses
It sets with simple and compact for structure, easy to operate, convenient for promoting, Multifunctional integration, precision is high, feature low in cost.
(2) present invention is real-time to the stress during test, strain using laser displacement sensor and pull pressure sensor
Record, facilitates subsequent processing and analysis to test data；It is invented compared with having, the contact area of circular sleeve and cylinder soil sample
Greatly, therefore it can be bonding to cylinder soil sample very well, avoiding cylinder soil sample, in test end generates stress concentration phenomenon, influences test essence
Degree；Track strip in vertical soil sample tensioning system can guarantee soil sample kept during tension axial tension avoid it is eccentric by
It draws, reduces test error.
(3) experimental rig through the invention and test method, it can be deduced that the ess-strain during soil body tension closes
System, this has important directive significance for real engineering and scientific research.
Detailed description of the invention
Fig. 1 is the schematic device that the present invention carries out stress test；
Fig. 2 is the schematic device that the present invention carries out strain-gauge test；
Fig. 3 is the connection schematic diagram of handwheel and threaded rod of the invention；
Fig. 4 is the structural schematic diagram of bearing of the invention；
Fig. 5 is the structural schematic diagram of universal fastener of the invention；
Each label in figure: 1- base-plate, 2- water tank, 3- water inlet pipe, 4- outlet pipe, 5- column I, 6- transmission rod, 7- bearing rod,
8- top cover circular sleeve, 9- track, 10- fixed pulley, 11- upright bar I, 12- laser displacement sensor, 13- pull pressure sensor,
14- valve, 15- lantern ring, 16- handwheel, 17- crossbeam, 18- nut, 19- becket, 20- S-hook I, the universal fastener of 21-,
22- steel cable rope, 23- bearing, 24- metal hanging ring II, 25- cylinder soil sample, 26- upright bar II, 27- bottom cover circular sleeve, 28- screw thread
Bar, 29-S shape link up with II, 30- metal hanging ring I, 31- S-hook III.
Specific embodiment
With reference to the accompanying drawings and examples, the invention will be further described, but the contents of the present invention be not limited to it is described
Range.
Embodiment 1: a kind of ess-strain control formula soil body test for tensile strength device, including Stress Control loading component,
Strain controlling loading component, lever transmission component, vertical soil sample tensile part, stress-strain monitoring component, base-plate 1；
The lever transmission component includes 23, two two root posts I 5, transmission rod 6,7, two beckets 19 of bearing rod, bearing S
Shape links up with I 20, two steel cable ropes 22；The bottom symmetrical of the two root posts I 5 is welded on base-plate 1, and two root posts I 5
Top be respectively equipped with hole, the both ends of the bearing rod 7 are each passed through the hole on I 5 top of two root posts, and the both ends of bearing rod 7
Be fixed in two root posts I 5 with nut 18 respectively, the middle part of the bearing rod 7 passes through one end of bearing 23, bearing 23 it is another
End is fixedly connected with the middle part of transmission rod 6, and becket 19 is respectively welded in the bottom both ends of the transmission rod 6, and described two S-shapeds are hung
One end of hook I 20 is connect with the becket 19 at both ends respectively, the other end of two S-hooks I 20 respectively with steel cable rope 22 one
End connection；
The vertical soil sample tensile part includes top cover circular sleeve 8, the track of upright bar I 11, two of bottom cover circular sleeve 27, two
9, four fixed pulleys 10；The bottom cover circular sleeve 27 is half-headed sleeve, and the bottom surface of the bottom cover circular sleeve 27 is welded
On base-plate 1, cylinder soil sample 25 to be measured is placed in bottom cover circular sleeve 27, and the top cover circular sleeve 8 is bottomless
Sleeve, the top cover circular sleeve 8 are mounted on the top of cylinder soil sample to be measured, and solid respectively on the two sides of top cover circular sleeve 8
A fixed track 9, two upright bars I 11 are located at the two sides of bottom cover circular sleeve 27, the bottom difference of two upright bars I 11
It is welded on base-plate 1, and two fixed pulleys 10, the side difference of two tracks 9 are installed in the top of two upright bars I 11 respectively
It is stuck in the slot of two fixed pulleys 10 on two I 11 top of upright bar, two fixed pulleys 10 on two I 11 tops of upright bar drive respectively
Two tracks 9 move up and down, and can move along fixed direction when soil sample is stretched, realization is uniaxially stretched, to avoid
Soil sample eccentric tension；
The stress-strain monitoring component includes laser displacement sensor 12, pull pressure sensor 13；The laser displacement sensing
Device 12 is mounted on I 11 top of upright bar of 27 side of bottom cover circular sleeve by bracket, and the probe of laser displacement sensor 12 is located at
The top of top cover circular sleeve 8, there are soil sample stretcher strains between the probe and top cover circular sleeve 8 of laser displacement sensor 12
Space, and laser displacement sensor 12 probe project light it is vertical with the top cover surface of top cover circular sleeve 8, the tension and compression
The bottom surface of force snesor 13 is fixed at the center of top cover circular sleeve 8, and the top of pull pressure sensor 13 is equipped with metal hanging ring I
30, the metal hanging ring I 30 is connect with one end of S-hook II 29,6 lower section one of the other end and transmission rod of S-hook II 29
The other end of the steel cable rope 22 of side connects；
The Stress Control loading component includes 14,4 water tank 2, water inlet pipe 3, outlet pipe 4, valve lantern rings 15；The water tank 2
For cube structure, lantern ring 15 is respectively equipped on four angles on the top of the water tank 2,4 lantern rings 15 pass through rope and S
One end connection of shape hook III 31, the other end of the steel cable rope 22 of the other end and 6 lower section other side of transmission rod of S-hook III 31
Connection, the top of the water tank 2 are equipped with water inlet pipe 3, and water inlet pipe 3 is equipped with inlet valve, and the bottom of water tank 2 is equipped with outlet pipe 4,
Outlet pipe 4 is equipped with flowing water Valve 14, indicates level scale on the side cabinet of the water tank 2；
The strain controlling loading component includes 17, two handwheel 16,28, two upright bars II 26 of threaded rod, crossbeam nuts 18；Institute
The bottom for stating two upright bars II 26 is each passed through the both ends of crossbeam 17 and is fixed on base-plate 1, two upright bars II 26
Top pass through nut 18 respectively and be fixed on crossbeam 17, the middle part of the crossbeam 17 is provided with hole, the bottom of the threaded rod 28
Across the hole at the middle part of crossbeam 17, screw thread is carved in the hole at the middle part of crossbeam 17 to be agreed with threaded rod 28, and 28 bottom of threaded rod
Portion is connect with the center of handwheel 16, and metal hanging ring II 24, II 24 top of metal hanging ring are installed in the top of the threaded rod 28
It is connect with one end of S-hook III 31, the other end of S-hook III 31 is connect with one end of universal fastener 21, universal fastener 21
The other end connect with the other end of the steel cable rope 22 of the 6 lower section other side of transmission rod.
The length of the water inlet pipe 3 is less than the side length of water tank 2.
The metal hanging ring II 24 is mounted on the top of threaded rod 28 in a welding manner.
Four fixed pulleys 10 are V-groove fixed pulley.
The laser displacement sensor 12, pull pressure sensor 13 are connect with computer.
It can start to test after installing all components, production soil sample, soil sample can according to need selection original state first
Soil sample or remoulded sample, the present embodiment cut sample device with three axis and carry out cutting sample to soil, obtain required cylinder soil sample 25；By cylinder
Soil sample 25 is put into the bottom cover circular sleeve 27 for being coated with glue, then being coated with 8 sets of top cover circular sleeve of glue in cylinder soil sample
25 tops, and the V-groove that 8 two sides of top cover circular sleeve set upper rail 9 can just be stuck in the installation of I 5 upper end of two root posts is determined
On pulley 10, the position coating lubricating oil that track 9 and V-groove fixed pulley 10 contact reduces frictional resistance between the two, raising is answered
The precision of power measurement, is then connected pull pressure sensor 13 with lever transmission component with S-hook 29 and thin tightwire rope 22, pushes up
Lid circular sleeve 8 is Nian Jie with hot melt adhesive with pull pressure sensor 13, and laser displacement sensor 12 is fixed by upright bar I 11, swashs
On the capping of the alignment probe top cover circular sleeve 8 of Optical displacement sensor 12, the capping of probe and top cover circular sleeve 8 keeps one
Fixed distance reserves the space of soil sample stretcher strain.
When Stress Control formula soil body test for tensile strength, mount stress controls loading component with thin tightwire rope 22 for square
The lantern ring 15 of 2 four apexes of water tank is fastened, then passes through S-hook III 31 for Stress Control loading component and lever transmission component
It connects, then checks the connection of all parts, guarantee that connection is good, check testing laser displacement sensor 12, draw
The connection of pressure sensor 13 and computer, every numerical value zeroing of sensor, and computer prepares timing, and it is past when load
It is uniformly filled the water in the water inlet pipe 3 of square water tank 2, controls rate of loading, load stretching is carried out to soil sample, until soil sample is drawn
Until disconnected destruction, stops load, stop the record of all data；It can also keep set by the way that certain load is arranged
The pulled condition of the soil body is observed after the load regular hour again, for example can observe soil body tension under control time parameter
It creeps situation；In a word according to required testing program, loading method, ultimate analysis and processing test data are selected, obtains the soil body
The mechanical characteristic of tension.
When strain controlling formula soil body test for tensile strength, Stress Control loading component is first removed, then strain controlling is installed and is added
Component is carried, the application strain of threaded rod 28 then rotated on handwheel 16 makes soil sample tension, and the mode of strain controlling is with 0.5mm/min
Uniformly apply, keeps the pulled condition for observing the soil body after set strain regular hour again, observe that the control time joins
The situation of creeping of several lower soil body tensions, ultimate analysis and processing test data, obtain the mechanical characteristic of soil body tension.
Embodiment 2: the present embodiment structure with embodiment 1, the difference is that, the length of the track 9 is top cover
2 times of 8 height of circular sleeve, the bottom surface melt viscosity of the pull pressure sensor 13 at the center of top cover circular sleeve 8,
Glue metal hanging ring 24 in the top of the pull pressure sensor 13.
The present embodiment carries out stress tension test, and vertical soil sample tensile part, stress-strain monitoring component, lever are passed
Power component, Stress Control loading component are installed, and the cylinder soil sample 25 made is put into the bottom cover circle set for being coated with glue
In cylinder 27, then the top cover circular sleeve 8 for being coated with glue is sleeved on to the top of cylinder soil sample 25, it then will be to by setting stress
After surveying the stress 1h that cylinder soil sample keeps set, the pulled condition of soil sample is observed, during test, Optical displacement sensor, drawing
Pressure sensor transfers data to computer and is analyzed；
Strained tensile test is carried out, then by vertical soil sample tensile part, stress-strain monitoring component, lever transmission component, strain
Control loading component is installed, and the cylinder soil sample 25 made is put into the bottom cover circular sleeve 27 for being coated with glue, then will
The top cover circular sleeve 8 for being coated with glue is sleeved on the top of cylinder soil sample 25, is then strained by setting by cylinder soil sample to be measured
After strain 1h set by keeping, the pulled condition of soil sample is observed, during test, Optical displacement sensor, pull pressure sensor
Computer is transferred data to be analyzed.
Above in conjunction with attached drawing, the embodiment of the present invention is explained in detail, but the present invention is not limited to above-mentioned
Embodiment within the knowledge of a person skilled in the art can also be before not departing from present inventive concept
Put that various changes can be made.
Claims (8)
1. a kind of ess-strain controls formula soil body test for tensile strength device, which is characterized in that including Stress Control loading component,
Strain controlling loading component, lever transmission component, vertical soil sample tensile part, stress-strain monitoring component, base-plate (1)；
The lever transmission component includes two root posts I (5), transmission rod (6), bearing rod (7), two beckets (19), bearings
(23), two S-hooks I (20), two steel cable ropes (22)；The bottom of the two root posts I (5) is separately fixed at base-plate
(1) on, and the top of two root posts I (5) is respectively equipped with hole, and the both ends of the bearing rod (7) are each passed through two root posts I (5)
The hole on top, and the both ends of bearing rod (7) are fixed in two root posts I (5) with nut (18) respectively, the bearing rod (7)
Middle part passes through the one end of bearing (23), is fixedly connected in the middle part of the other end of bearing (23) and transmission rod (6), the transmission rod
(6) becket (19) are fixed respectively in bottom both ends, one end of described two S-hooks I (20) becket with both ends respectively
(19) it connects, the other end of two S-hooks I (20) is connect with one end of steel cable rope (22) respectively；
The vertical soil sample tensile part includes top cover circular sleeve (8), bottom cover circular sleeve (27), two upright bars I (11), two
Track (9), four fixed pulleys (10)；The bottom cover circular sleeve (27) is half-headed sleeve, the bottom cover circular sleeve
(27) bottom surface is fixed on base-plate (1), and cylinder soil sample (25) to be measured is placed in bottom cover circular sleeve (27), the top
Lid circular sleeve (8) is bottomless sleeve, and the top cover circular sleeve (8) is mounted on the top of cylinder soil sample to be measured, and top cover
A track (9) is fixed on the two sides of circular sleeve (8) respectively, two upright bars I (11) are located at bottom cover circular sleeve
(27) two sides, the bottom of two upright bars I (11) are separately fixed on base-plate (1), and the upper part of two upright bars I (11)
Not An Zhuan two fixed pulleys (10), the side of two tracks (9) is stuck in two fixed pulleys on two upright bar I (11) tops
(10) in slot, two fixed pulleys (10) on two upright bar I (11) top drive two tracks (9) to move up and down respectively；
The stress-strain monitoring component includes laser displacement sensor (12), pull pressure sensor (13)；The laser displacement
Sensor (12) is mounted at the top of the upright bar I (11) of bottom cover circular sleeve (27) side by bracket, laser displacement sensor
(12) probe is located at the top of top cover circular sleeve (8), and the light of the probe injection of laser displacement sensor (12) and top
The top cover surface of lid circular sleeve (8) is vertical, and the bottom surface of the pull pressure sensor (13) is fixed in top cover circular sleeve (8)
At the heart, the top of pull pressure sensor (13) is equipped with metal hanging ring I (30), the metal hanging ring I (30) and S-hook II (29)
One end connection, the other end of S-hook II (29) connect with the other end of the steel cable rope (22) of transmission rod (6) lower section side；
The Stress Control loading component includes water tank (2), water inlet pipe (3), outlet pipe (4), valve (14), more than one set
Ring (15)；The top of the water tank (2) is equipped with more than one lantern ring (15), and one above lantern ring (15) passes through rope
It is connect with one end of S-hook III (31), the steel cable rope of the other side below the other end of S-hook III (31) and transmission rod (6)
(22) other end connection, the top of the water tank (2) are equipped with water inlet pipe (3), and water inlet pipe (3) is equipped with inlet valve, water tank
(2) bottom is equipped with outlet pipe (4), and outlet pipe (4) is equipped with flowing water Valve (14), the side cabinet subscript of the water tank (2)
There is level scale；
The strain controlling loading component includes handwheel (16), threaded rod (28), two upright bars II (26), crossbeam (17), two
Nut (18)；The bottom of two upright bars II (26) is each passed through the both ends of crossbeam (17) and is fixed on base-plate (1),
The top of two upright bars II (26) passes through nut (18) respectively and is fixed on crossbeam (17), opens in the middle part of the crossbeam (17)
There is hole, the bottom of the threaded rod (28) passes through the hole at the middle part of crossbeam (17), is carved with screw thread in the hole at the middle part of crossbeam (17)
It can agree with threaded rod (28), and threaded rod (28) bottom is connect with the center of handwheel (16), the top of the threaded rod (28)
It installs metal hanging ring II (24), is connect at the top of the metal hanging ring II (24) with one end of S-hook III (31), S-hook III
(31) the other end is connect with the one end of universal fastener (21), and the other end of universal fastener (21) and transmission rod (6) lower section are another
The other end of the steel cable rope (22) of side connects.
2. ess-strain according to claim 1 controls formula soil body test for tensile strength device, it is characterised in that: it is described into
The length of water pipe (3) is less than the side length of water tank (2).
3. ess-strain according to claim 1 controls formula soil body test for tensile strength device, it is characterised in that: the gold
Belong to the top that hanging ring II (24) are mounted on threaded rod (28) in a welding manner.
4. ess-strain according to claim 1 controls formula soil body test for tensile strength device, it is characterised in that: the rail
The length in road (9) is 2 times of top cover circular sleeve (8) height.
5. ess-strain according to claim 1 controls formula soil body test for tensile strength device, it is characterised in that: described four
A fixed pulley (10) is V-groove fixed pulley.
6. ess-strain according to claim 1 controls formula soil body test for tensile strength device, it is characterised in that: the drawing
The bottom surface melt viscosity of pressure sensor (13) is at the center of top cover circular sleeve (8), the pull pressure sensor (13)
Top glue metal hanging ring (24).
7. ess-strain according to claim 1 controls formula soil body test for tensile strength device, it is characterised in that: described to swash
Optical displacement sensor (12), pull pressure sensor (13) are connect with computer.
8. ess-strain described in claim 1 ~ 7 controls the test method of formula soil body test for tensile strength device, feature exists
In, the specific steps are as follows:
(1) if stress tension test is carried out, by vertical soil sample tensile part, stress-strain monitoring component, lever transmission portion
Part, Stress Control loading component are installed, and the cylinder soil sample (25) made is put into the bottom cover circular sleeve for being coated with glue
(27) in, then the top cover circular sleeve (8) for being coated with glue is sleeved on to the top of cylinder soil sample (25), then soil sample is added
It carries and stretches, until soil sample is pulled off destruction, or cylinder soil sample (25) to be measured is kept set by setting stress and is answered
After the time that one of power, the pulled condition of soil sample is observed, during test, Optical displacement sensor (12), pull pressure sensor
(13) computer is transferred data to be analyzed；
(2) if strained tensile test is carried out, by vertical soil sample tensile part, stress-strain monitoring component, lever transmission portion
Part, strain controlling loading component are installed, and the cylinder soil sample (25) made is put into the bottom cover circular sleeve for being coated with glue
(27) in, then the top cover circular sleeve (8) for being coated with glue is sleeved on to the top of cylinder soil sample (25), then soil sample is added
It carries and stretches, until soil sample is pulled off destruction, or cylinder soil sample (25) to be measured is kept set by setting strain and is answered
After becoming one of time, the pulled condition of soil sample is observed, during test, Optical displacement sensor (12), pull pressure sensor
(13) computer is transferred data to be analyzed.
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