CN102156073A - Unsaturated and saturated soil tensile strength tester based on electric control loading - Google Patents
Unsaturated and saturated soil tensile strength tester based on electric control loading Download PDFInfo
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- CN102156073A CN102156073A CN 201110052708 CN201110052708A CN102156073A CN 102156073 A CN102156073 A CN 102156073A CN 201110052708 CN201110052708 CN 201110052708 CN 201110052708 A CN201110052708 A CN 201110052708A CN 102156073 A CN102156073 A CN 102156073A
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Abstract
The invention discloses an unsaturated and saturated soil tensile strength tester based on electric control loading, comprising a cross beam, a vertical column and a base, which are connected from top to bottom in turn, wherein the base is provided with a soil beam positioning operation system; the cross beam is provided with a loading system and a measuring system. The tester of the invention solves the problem that the existing device can not be suitable for undisturbed soil or remoulded soils which are saturated or with a relatively high humidity on the basis of effectively overcoming the friction force and the adsorptive action of the earth beam bottom and the base.
Description
Technical field
The test unit that soil body tensile strength of the present invention is measured is specifically related to a kind of unsaturation and saturated soil body test for tensile strength device based on electronic control loaded.
Background technology
In many Geotechnical Engineerings, can ftracture in the soil body load-bearing process, these cracks often are because the fail in tension of the soil body causes.For example during slope soil generation certain deformation, shear failure or fail in tension can take place in the soil body, thereby generation crack, these cracks are generally larger, go deep into slope soil, produce serious harm, especially have structural loess slope project for the soil-slope engineering, less relatively because of its displacement deformation, destroy comparatively suddenly, tend to produce catastrophic consequence.All there are cracking phenomena in cohesive soil behind many in addition retaining walls and cohesive soil slope sliding mass, though shear failure has taken place in some soil body unit in this case, but also some soil body unit is in fail in tension, and this stretching has directly caused soil body cracking, and the drawing crack seam is generally open fracture, endangers bigger.Therefore, the tensile strength of the soil body is very big to earth structure and slope stability influence.
In recent years, along with rapid economy development, building in a large number of highway, airport, high earth and rockfill dam, producing the engineering problem that causes that ftractures in the earth structure increases gradually, in the generation reason and crack treatment design for scheme in these cracks of research, the correct understanding of the tensile characteristics of soil and the correct measurement of tensile strength index are more and more seemed important.On the one hand, natural slight slope is in unsaturated state mostly in NORTHWEST CHINA portion, and unsaturation also can not be ignored for the intensity effect of the soil body; On the other hand, be positioned at many natural slight slopes and ground and be in state of saturation below the underground water table, the tensile strength of the saturated soil body also can not be ignored stability of rock-soil body influence, therefore is familiar with and measures saturatedly all to have crucial meaning with tensile strength unsaturated soil.
The device that is used for the test of soil body tensile strength has direct tensilometer and two kinds of indirect tensilometers, and directly tensilometer mainly refers to the uniaxial tension instrument at present.Though these test for tensile strength devices can be tested the unsaturation undisturbed soil of certain water content ranges, but dress sample difficulty, for saturated or bigger humidity range reinvent or undisturbed soil sample then is difficult to realize, and the soil sample two ends are very easily destroyed owing to stress is concentrated, and then cause the sample success ratio to descend, in addition, the handwheel rotating speed is difficult to accurate control stretching speed, it is bigger to cause test findings influenced by human factor, and when the draw speed requirement was very little, instrument was difficult to realize.Directly tensilometer is simple to operate, but needs as mechanical clamp method, macromolecular material mull technique, freezing etc., to be easy to generate the stress concentration phenomenon at wobbler action power and close test specimen two ends with the fixing test specimen of special method in the test.Sample is difficult for installing simultaneously, and the influence of process of the test human factor is also bigger.At present, tensile test apparatus mainly refers to native beam deflection tensilometer indirectly.Indirectly tensilometer is clear and definite not as the stress of sample in the direct tensile test, but that its advantage is a process of the test is easier, and the tensile strength that provides is also reliable.At present, the shortcoming that such test exists on the one hand, is that the ratio of precision of the stress and strain curve that obtains is lower; On the other hand, existing vertical native beam deflection tensilometer is difficult to realize and considers sample soil body saturation conditions, and horizontal native beam deflection tensilometer is difficult to overcome and calculate friction force between soil sample and the base plate and the influence of friction force uneven distribution during load-bearing.In addition, such test unit not only lacks the sample making apparatus of the manipulated soil that can control water cut, also lacks corresponding testing equipment and the sample preparation utility appliance that can test undisturbed soil tensile strength simultaneously, does not realize the test for tensile strength of soil under the saturation conditions simultaneously.
The above several cohesive soil test for tensile strength devices of contrast can be summarized as follows 4 problems:
(1) these test units all belong to the testing equipment that interim making is used, the less and unstable properties of their function, and test operation is numerous and diverse and lack of standardization, operates in the whole process to be subjected to artificial factor bigger from the sample preparation to the tensile test.Therefore at present that do not take on a certain scale, that control performance is stable, working specification, accommodation more widely, measure easily, the formal finished product of similar test unit that typing is ripe.
(2) in these test units, vertical uniaxial tension instrument be difficult to overcome the influence of sample gravity and anchor clamps cause can not even stressed problem, horizontal uniaxial tension instrument be difficult to overcome the influence of friction force between sample soil sample and the base plate and anchor clamps cause can not even stressed problem; Existing vertical native beam deflection tensilometer is difficult to realize and considers sample soil body saturation conditions, and horizontal native beam deflection tensilometer is difficult to overcome and calculate friction force between soil sample and the base plate and the influence of friction force uneven distribution during load-bearing.Therefore, the present test unit that still lacks at the effective soil body tensile strength that overcomes these influences.
(3) these test unit great majority can only be to carry out at manipulated soil, though the manipulated soil sample making course is convenient, this and natural undisturbed soil still have the difference of essence, especially at having the obviously structural soil body.Therefore, not only lack the sample making apparatus of the manipulated soil that can control water cut at present, also lack corresponding testing equipment and the sample preparation utility appliance that to test undisturbed soil tensile strength simultaneously.
(4) still be difficult to realize the test for tensile strength of saturated soil in these test units, especially cause how guaranteeing that for the saturated soil body it is the difficult point problem that soil body test for tensile strength faces that sample is in state of saturation all the time always in the tensile test process in the test of soil body tensile strength variation in the research change of moisture content.Therefore, still lack the test unit of realizing soil body tensile strength at strict saturation conditions down at present.
In sum, these are the interim soil body test for tensile strength device of making of using at present, because the less and unstable properties of function, test operation is numerous and diverse and lack of standardization, be subjected to artificial factor bigger, and also incompatibility saturated soil tensile strength is measured, and more is not suitable for the undisturbed soil with special construction.Therefore, based at research with unsaturation and structural soil body tensile mechanical property, use for reference the thinking of native beam deflection tensile test apparatus, develop and take on a certain scale, that control performance is stable, working specification, accommodation more widely, measure easily, the formal finished product of similar test unit that typing is ripe, to adapt to the tensile mechanical property research of the special nature soil body, be all to have very important significance to the needs of actual geotechnical study or to soil body tensile test device research and development innovation.
Summary of the invention
The purpose of this invention is to provide a kind of unsaturation and saturated soil body test for tensile strength device, solved existing apparatus and can not be applicable to saturated or the original state that humidity is bigger or the problem of manipulated soil based on electronic control loaded.
The technical solution adopted in the present invention is, a kind of unsaturation and saturated soil body test for tensile strength device based on electronic control loaded, comprise the crossbeam, column and the base that are fixedly connected sequentially from top to bottom, base is provided with native beam positioning action system, and crossbeam is provided with loading system and measurement system;
Soil beam positioning action system comprises the pressure chamber's side plate that is fixed on the base, and the top of pressure chamber's side plate detachably is equipped with the transparent cover of going up, and covers on transparent to have water injection hole, aspirating hole and vacuum manometer mounting hole; On the base and be positioned at transparent on the enclosure space of cover and pressure chamber's side plate formation, be fixed with the little air drain plate that is used for placing soil sample, the upper surface of little air drain plate has a plurality of little air drains hole, have through hole one longitudinally on the center of little air drain plate upper end, the top at two ends, little air drain plate left and right sides all is vertically arranged with and is used to limit the spacer pin that soil sample moves up; Also comprise middle support plate, middle support plate is two vertical plates and the right angle arch that leveling board is formed, the both sides, front and back that two vertical plates of middle support plate are fitted respectively and are arranged on little air drain plate, on these two vertical plates, all have through hole two with through hole one corresponding position, the width of two through holes two is less than or equal to the width of through hole one, run through two through hole two horizontal positioned equal portable plate and the thrust pin that can freely extract out arranged, thrust pin is positioned at the bottom of through hole two, portable plate is positioned at the top of thrust pin, and the upper surface of portable plate and thrust pin is concordant; In the upper end of leveling board of support plate be fixed with and be used for the connecting portion that is connected with measurement system;
Loading system comprises servomotor, and is connected on the output shaft of servomotor and by its strain control loaded device that drives work, the output shaft of strain control loaded device is provided with straight down;
Measurement system comprises the displacement induction support on the output shaft that is fixedly connected on strain control loaded device, be fixed with the digital display dynamometer on the displacement induction support, the digital display dynamometry is counted straight down and is provided with, and its bottom can be connected by the connecting portion of hook with native beam positioning action system, be fixed with displacement transducer by sensor stand on crossbeam, displacement transducer is for vertically setting and its test lead are against on the displacement induction support.
Connecting portion is that middle key seat and level are interted middle pin on the key seat in described.
At both ends, little air drain plate left and right sides, be symmetrically installed with two spacer pin installing plates before and after all, spacer pin interts and is arranged in the mounting hole of two corresponding spacer pin installing plates.
The front and back two side ends of little air drain plate is provided with shoulder, and the lower surface of two vertical plates of middle support plate is against respectively on two shoulders.
The outside of two vertical plates of middle support plate is provided with side plate, two side plates are installed on little air drain plate by screw, the width that all has three, two through holes three of through hole with through hole one corresponding position on two side plates all is less than or equal to the width of through hole one.
Two through holes two are formed by last arch hole and following arch hole that direction is provided with on the contrary, and go up the width of the width in arch hole greater than following arch hole.
Portable plate and thrust pin are positioned at arch hole down, and the upper surface of portable plate is concordant with the upper surface in following arch hole.
The shape of through hole one is identical with the shape in following arch hole.
The shape of two through holes three is arc tips arch hole down.
Apparatus of the present invention are not only applicable to general unsaturation original state or manipulated soil tensile strength and measure, and are particularly useful for the tensile strength test of manipulated soil and original state sample under the saturation conditions.The present invention is by electronic control loaded speed, employing has the automatic acquisition test data of the digital display dynamometer of memory function, and it is saturated by vacuum air pump soil sample to be carried out original position, and can carry out tensile test in water, reduce the influence of gravity and saturation degree distortion, the suction that produces when simultaneously little air drain plate also can reduce soil sample and is in contact with it has effectively guaranteed to have the precision of test simple in structure, easy to operate, control stabilization, data are reliable, characteristics such as safety economy
Description of drawings
Fig. 1 the present invention is based on the unsaturation of electronic control loaded and the structural representation of saturated soil body test for tensile strength device;
Fig. 2 is the side view of Fig. 1;
To be native beam positioning action of the present invention system vacuumize the synoptic diagram that water filling device is connected with outside to Fig. 3;
Fig. 4 is the structural representation of middle support plate of the present invention;
Fig. 5 is the structural representation of side plate of the present invention;
Fig. 6 is the structural representation of little air drain plate of the present invention.
Wherein, 1. loading system, 2. strain control loaded device, 3. crossbeam, 4. measurement system, 5. column, 6. native beam positioning action system, 7. base, 8. servomotor, 9. angle steel, 10. sensor stand, 11. displacement transducer, 12. displacements induction support, 13. bolts, 14. the digital display dynamometer, the 15. transparent covers of going up, pin in 16., 17. middle key seat, support plate in 18., 19. pressure chamber's side plates, 20. spacer pin, 21. spacer pin installing plates, 22. portable plates, 23. thrust pin, 24. side plates, 25. little air drain plates, 26. vacuum manometer, 27. handwheels, 28. water injection pipes, 29. exhaust tube, 30. two-port valves, 31. pipe clamps, 32. air pump, 33. through holes, two, 34. through holes three, 35. little air drain hole, 36. through holes, one, 37. shoulder.
Embodiment
The present invention is described in detail below in conjunction with the drawings and specific embodiments.
As depicted in figs. 1 and 2, the present invention is based on the unsaturation and the saturated soil body test for tensile strength device of electronic control loaded, comprise the crossbeam 3, column 5 and the base 7 that are fixedly connected sequentially from top to bottom, base 7 is provided with native beam positioning action system 6, and crossbeam 3 is provided with loading system 1 and measurement system 4.
Wherein, native beam positioning action system 6 comprises pressure chamber's side plate 19, transparent cover 15, little air drain plate 25, spacer pin 20, middle support plate 18, portable plate 22 and the thrust pin 23 gone up.Pressure chamber's side plate 19 is fixed on the base 7, and transparent upward cover 15 detachably is installed in the top of pressure chamber's side plate 19, and transparent going up on the cover 15 has water injection hole, aspirating hole and vacuum manometer mounting hole.
As Fig. 1, Fig. 2 and shown in Figure 6, being positioned at the transparent enclosure space of going up cover 15 and 19 formation of pressure chamber's side plate is that vacuum pressure is indoor, on base 7, the little air drain plate 25 that is used for placing soil sample is installed by screw.The upper surface of little air drain plate 25 has a plurality of little air drains hole 35, has through hole 1 longitudinally on the center of little air drain plate 25 upper ends.At both ends, little air drain plate 25 left and right sides, be symmetrically arranged with two spacer pin installing plates 21 all, spacer pin installing plate 21 is installed on little air drain plate 25 by screw, also comprise the spacer pin 20 that two vertical equities are provided with, individual spacer pin 20 is used to limit soil sample and moves up, and spacer pin 20 interts respectively and is arranged in the mounting hole of two corresponding spacer pin installing plates 21.
As shown in Figure 4, middle support plate 18 is two vertical plates and the right angle arch that leveling board is formed, the both sides, front and back that two vertical plates of middle support plate 18 are fitted respectively and are arranged on described little air drain plate 25.The front and back two side ends of little air drain plate 25 is provided with shoulder 37, and the lower surface of two vertical plates of middle support plate 18 is against respectively on two shoulders 37.On these two vertical plates, all have through hole 2 33 with through hole one 36 corresponding positions.Running through two through hole 2 33 horizontal positioned has portable plate 22 and thrust pin 23, and thrust pin 23 is positioned at the bottom of through hole 2 33, and portable plate 22 is positioned at the top of thrust pin 23, and portable plate 22 is concordant with the upper surface of thrust pin 23.In order to guarantee all free level extractions of energy of portable plate 22 and thrust pin 23, the width of two through holes 2 33 is less than or equal to the width of through hole 1.In the upper end of leveling board of support plate 18 be fixed with and be used for the connecting portion that is connected with measurement system 4.Connecting portion is that middle key seat 17 and level are interted middle pin 16 on middle key seat 17.
As depicted in figs. 1 and 2, loading system 1 comprises servomotor 8, and is connected on the output shaft of servomotor 8 and by its strain control loaded device 2 that drives work, the output shaft of strain control loaded device 2 is provided with straight down.Loading system 1 is fixed on the top of crossbeam 3 by angle steel 9.
As depicted in figs. 1 and 2, measurement system 4 comprises sensor stand 10, displacement transducer 11, displacement induction support 12 and digital display dynamometer 14.Displacement induction support 12 is fixedly connected on the output shaft of strain control loaded device 2, on digital display dynamometer 14 is fixed on the displacement induction support 12 by bolt 13, digital display dynamometer 14 is setting straight down, and the bottom of digital display dynamometer 14 can be connected with middle pin 16 by hook.Sensor stand 10 is installed on the crossbeam 3 by screw, and displacement transducer 11 vertically is installed on the sensor stand 10, and the test lead of displacement transducer 11 is against the upper end of displacement induction support 12.
As Fig. 1, Fig. 2 and Fig. 5,, be provided with 24, two side plates 24 of side plate in the outside of two vertical plates of middle support plate 18 and be connected by screw on little air drain plate 25 for support plate 18 in guaranteeing does not move in the horizontal direction.In order to guarantee all free level extractions of energy of portable plate 22 and thrust pin 23, on two side plates 24, all have through hole 3 34, and the width of two through holes 3 34 all is less than or equal to the width of through hole 1 with through hole one 36 corresponding positions.
The shape of through hole 1, through hole 2 33 and through hole 3 34 is provided with and requires to guarantee that portable plate 22 and thrust pin 23 all can get final product in free level extraction.As shown in Figure 4, in the present embodiment, on middle support plate 18, two through holes 2 33 are formed by last arch hole and following arch hole that direction is provided with on the contrary, and go up the width of the width in arch hole greater than following arch hole.At this moment, portable plate 22 and thrust pin 23 are positioned at arch hole down, and the upper surface of portable plate 22 is concordant with the upper surface in following arch hole.As shown in Figure 5, on side plate 24, the shape of through hole 3 34 is arc tips arch hole down.The shape of through hole 1 is generally, and as shown in Figure 6, on little air drain plate 25, the shape of through hole 1 is identical with the shape in following arch hole.
For general unsaturation original state or remoulded sample, before the test, open the transparent cover 15 of going up, undisturbed soil beam that cutting in advance is good or the manipulated soil beam sample for preparing place on little air drain plate 25, four spacer pin installing plates 21 are installed, two spacer pins 20 are interted on corresponding spacer pin installing plate 21, and the Tu Liang that two spacer pins 20 can limit moves up; Then middle support plate 18 is placed about native beam, fixing with side plate 24.During test, digital display dynamometer 14 lower ends are connected on the middle pin 16 by hook, by the handwheel 27 on the strain control loaded device 2 strain control loaded device 2 is transferred to the required loading speed of test, the load bearings that is driven strain control loaded device 2 by servomotor 8 is advanced, and displacement transducer 11 lower ends is against the upper end of displacement induction support 12; Rising along with the load bearings of strain control loaded device 2, displacement induction support 12 also rises thereupon, displacement transducer 11 will show the process of displacement this moment, pin 16 rises thereupon simultaneously, thrust pin 23 also can move upward, this moment, level was extracted portable plate 22 out, when treating that thrust pin 23 rises the native beam lower surface of contact, with 14 zeroings of digital display dynamometer; At this moment, providing upwards by thrust pin 23, thrust promotes Tu Liang, and the two ends, the left and right sides of Tu Liang are subjected to the constraint of spacer pin 20, to bend, when thrust arrives to a certain degree, the soil beam will destroy, and this moment, digital display dynamometer 14 numerals that write down were the load of asking, and displacement transducer 11 writes down numeral by being asked displacement.Little air drain plate 25 can reduce the suction between Tu Liang and the base plate in this process.After Tu Liang destroys, close servomotor 8, take out soil sample, off-test.
Reinvent or undisturbed soil sample for saturated, what operation steps was different is, after Jiang Tuliang installs, corresponding water injection pipe 28, exhaust tube 29 and the vacuum manometer 26 of being connected on water injection hole, aspirating hole and the vacuum manometer mounting hole of cover 15 on transparent, wherein, pipe clamp 31 is installed on the water injection pipe 28, two-port valve 30 is installed on the exhaust tube 29 and is connected with air pump 32.Use 32 pairs of vacuum pressure chambers of air pump to vacuumize, vacuum manometer 26 shows the indoor negative pressure value of vacuum pressures, after pressure arrives certain value, by water injection pipe 28 to the water filling of vacuum pressure chamber, after water logging did not have native beam certain altitude, close pipe clamp 31 and stop water filling.Continue to vacuumize a period of time,, close two-port valve 30 and stop to bleed to guarantee that Tu Liang is fully saturated in position.At this moment, Tu Liang is fully saturated, opens the transparent cover 15 of going up, the Nei Shui of pressure chamber is blotted or place water to test Tu Liang, pin 16 during digital display dynamometer 14 lower ends are connected in by hook begins test, and this step requires to finish as early as possible behind the cover 15 on transparent opening.In addition, this device also can be realized the test of Tu Liang in water, and this kind test method can also reduce the influence of native beam gravity and saturation degree distortion.
The present invention adopts vertical loading bearing mode, has effectively avoided the friction force problem of Tu Liang and base plate in the horizontal type device of prior art; Adopt the particular design of native beam positioning action system, designed dismountable vacuum pressure chamber, realized the saturated function of vacuum of corresponding strictness, expanded the test function of equipment effectively in native beam test original position; Adopt the motor-driven design of adjustable speed, realized control performance technical measures stable, working specification; Adopt the design of digital display dynamometer, realized that measurement data gathers automatically, make data acquisition convenient and reliable; Adopt little air drain plate design between Tu Liang and the base plate, effectively reduce under saturation conditions that Tu Liang contacts with base plate suction, suction-operated, improved test accuracy.
Claims (9)
1. unsaturation and saturated soil body test for tensile strength device based on an electronic control loaded, it is characterized in that, comprise the crossbeam (3), column (5) and the base (7) that are fixedly connected sequentially from top to bottom, described base (7) is provided with native beam positioning action system (6), and described crossbeam (3) is provided with loading system (1) and measurement system (4);
Described native beam positioning action system (6) comprises the pressure chamber's side plate (19) that is fixed on the described base (7), the top of described pressure chamber side plate (19) detachably is equipped with the transparent cover (15) of going up, and described transparent going up on the cover (15) has water injection hole, aspirating hole and vacuum manometer mounting hole; Go up and be positioned at the enclosure space of described transparent upward cover (15) and pressure chamber's side plate (19) formation at described base (7), be fixed with the little air drain plate (25) that is used for placing soil sample, the upper surface of described little air drain plate (25) has a plurality of little air drains holes (35), have through hole one (36) longitudinally on the center of described little air drain plate (25) upper end, the top at described little air drain plate (25) two ends, the left and right sides all is vertically arranged with and is used to limit the spacer pin (20) that soil sample moves up; Also comprise middle support plate (18), support plate (18) is two vertical plates and the right angle arch that leveling board is formed in described, two vertical plates of support plate (18) are fitted respectively and are arranged on the both sides, front and back of described little air drain plate (25) in described, on these two vertical plates, all have through hole two (33) with described through hole one (36) corresponding position, the width of described two through holes two (33) is less than or equal to the width of through hole one (36), run through described two through holes, two (33) horizontal positioned equal portable plate (22) and the thrust pin (23) that can freely extract out arranged, described thrust pin (23) is positioned at the bottom of through hole two (33), described portable plate (22) is positioned at the top of thrust pin (23), and portable plate (22) is concordant with the upper surface of thrust pin (23); The upper end of leveling board of support plate (18) is fixed with and is used for the connecting portion that is connected with described measurement system (4) in described;
Described loading system (1) comprises servomotor (8), and is connected on the output shaft of described servomotor (8) and by its strain control loaded device (2) that drives work, the output shaft of described strain control loaded device (2) is provided with straight down;
Described measurement system (4) comprises the displacement induction support (12) on the output shaft that is fixedly connected on described strain control loaded device (2), be fixed with digital display dynamometer (14) on the described displacement induction support (12), described digital display dynamometer (14) is for being provided with straight down, and its bottom can be connected with the connecting portion of described native beam positioning action system (6) by hook, upward be fixed with displacement transducer (11) by sensor stand (10) at described crossbeam (3), described displacement transducer (11) is for vertically setting and its test lead are against on the displacement induction support (12).
2. according to claim 1 described unsaturation and saturated soil body test for tensile strength device, it is characterized in that described connecting portion is that middle key seat (17) and level are interted middle pin (16) on the key seat in described (17) based on electronic control loaded.
3. according to claim 1 described unsaturation and saturated soil body test for tensile strength device based on electronic control loaded, it is characterized in that, at described little air drain plate (25) both ends, the left and right sides, be symmetrically installed with two spacer pin installing plates (21) all, described spacer pin (20) interts and is arranged in the mounting hole of corresponding two spacer pin installing plates (21).
4. according to claim 1 described unsaturation and saturated soil body test for tensile strength device based on electronic control loaded, it is characterized in that, the front and back two side ends of described little air drain plate (25) is provided with shoulder (37), and the lower surface of two vertical plates of described middle support plate (18) is against respectively on described two shoulders (37).
5. according to claim 1 described unsaturation and saturated soil body test for tensile strength device based on electronic control loaded, it is characterized in that, the outside of two vertical plates of support plate (18) is provided with side plate (24) in described, described two side plates (24) are installed on described little air drain plate (25) by screw, upward all have through hole three (34) with described through hole one (36) corresponding position at two side plates (24), the width of described two through holes three (34) all is less than or equal to the width of through hole one (36).
6. according to claim 1 or 5 described unsaturation and saturated soil body test for tensile strength devices based on electronic control loaded, it is characterized in that, described two through holes two (33) are formed by opposite last arch hole that is provided with of direction and following arch hole, and the described width in arch hole of going up is greater than the described width in arch hole down.
7. according to claim 6 described unsaturation and saturated soil body test for tensile strength device based on electronic control loaded, it is characterized in that, described portable plate (22) and thrust pin (23) are positioned at described arch hole down, and the upper surface of described portable plate (22) is concordant with the upper surface in described arch hole down.
8. according to claim 6 or 7 described unsaturation and saturated soil body test for tensile strength devices, it is characterized in that the shape of described through hole one (36) is identical with the shape in described arch hole down based on electronic control loaded.
9. according to claim 5 described unsaturation and saturated soil body test for tensile strength device, it is characterized in that the shape of described two through holes three (34) is arc tips arch hole down based on electronic control loaded.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102901669A (en) * | 2012-08-23 | 2013-01-30 | 苏州南智传感科技有限公司 | 8-analogue-shaped soil uniaxial tensile tester |
| CN106289979A (en) * | 2016-09-09 | 2017-01-04 | 中国地质大学（武汉） | Unsaturated soil tensile strength test device and method of testing |
| GB2572866A (en) * | 2018-04-09 | 2019-10-16 | Univ Taiyuan Technology | Testing apparatus for determining tensile strength of soil and rock |
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| 《水利水电科技进展》 20011031 党进谦等 单轴土工拉伸仪的研制 31-32 1-9 第21卷, 第5期 * |
Cited By (5)
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| CN102901669A (en) * | 2012-08-23 | 2013-01-30 | 苏州南智传感科技有限公司 | 8-analogue-shaped soil uniaxial tensile tester |
| CN106289979A (en) * | 2016-09-09 | 2017-01-04 | 中国地质大学（武汉） | Unsaturated soil tensile strength test device and method of testing |
| CN106289979B (en) * | 2016-09-09 | 2019-01-15 | 中国地质大学（武汉） | Unsaturated soil tensile strength test device and test method |
| GB2572866A (en) * | 2018-04-09 | 2019-10-16 | Univ Taiyuan Technology | Testing apparatus for determining tensile strength of soil and rock |
| GB2572866B (en) * | 2018-04-09 | 2020-06-03 | Univ Taiyuan Technology | Testing apparatus for determining tensile strength of soil and rock |
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| CN102156073B (en) | 2012-11-28 |
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