CN110006732B - Rubber band's mounting tool among ground triaxial test - Google Patents
Rubber band's mounting tool among ground triaxial test Download PDFInfo
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- CN110006732B CN110006732B CN201910339748.7A CN201910339748A CN110006732B CN 110006732 B CN110006732 B CN 110006732B CN 201910339748 A CN201910339748 A CN 201910339748A CN 110006732 B CN110006732 B CN 110006732B
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- rubber band
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/36—Embedding or analogous mounting of samples
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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
- G01N3/02—Details
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Sampling And Sample Adjustment (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention discloses an installation tool for a rubber band in a rock-soil triaxial test, which comprises a contraction platform support, a rubber band contraction platform, a control handle and a rotating shaft, wherein the rubber band contraction platform is of a circular ring structure, a plurality of push rods are uniformly distributed on the upper top surface of the rubber band contraction platform along the circumferential direction, the contraction platform support is of an annular cover structure and covers the rubber band contraction platform, an opening is formed in the same vertical position of the contraction platform support and the rubber band contraction platform, the upper top surface of the rubber band contraction platform is connected with the inner top surface of the contraction platform support through a first spring, a plurality of open grooves matched with the push rods are formed in the upper top surface of the contraction platform support, and a clamping groove is formed in the outer wall of the rubber band contraction platform along the circumferential direction. The invention avoids direct contact between people and the soil sample by using the tool, and can synchronously and quickly finish the installation of the rubber band by using the tool, thereby reducing the artificial disturbance of the soil sample and leading the test data to be closer to the real result.
Description
Technical Field
The invention relates to the field of geotechnical triaxial test instruments in geotechnical engineering, in particular to an installation tool for a rubber band in geotechnical triaxial test.
Background
With the development of economy in China, the research depth of deep foundations, soft soil foundations and underground space structures is gradually increasedAnd (4) increasing. Sometimes, a large number of soil tests are required to be carried out in order to accurately know the characteristic indexes of the current stratum soil. The triaxial test method is an important means for researching physical and mechanical properties of the soil body, the current stress state of the soil body can be simulated to the maximum extent through the triaxial test, and the stress condition of the soil body under the complex coupling condition can be researched by controlling the initial state (whether drainage and consolidation exist) of the soil sample, the damage form and the load time of the stress condition (side limit condition, normal consolidation and hyperconcentration), so that important control indexes are provided for geotechnical engineering investigation, design, construction and maintenance. However, the soil sample is inevitably disturbed by complicated manual operations during the soil test. For example, in the triaxial test soil sample installation process, the latex film and the rubber band are used for fixing the soil sample and preventing water in the pressure chamber from entering the soil sample, and when the soil sample is higher in height (
) When the soil sample is used, the rubber bands are directly installed by hands, so that the left and right asynchronism can be obvious, and the left and right deviation of the soil sample central shaft can be caused. Particularly, when the saturation of the soil sample is high (the water content is high) or the content of the clay is high, namely the soil body is in a soft plastic or flow plastic state, the disturbance behavior is amplified continuously and becomes more obvious along with the increase of the water content. Sometimes, the test data may even be different from the actual results, thereby affecting the judgment of researchers or engineers.
Disclosure of Invention
In order to reduce errors caused by manual operation in geotechnical tests, the invention provides the tool for installing the rubber band in the geotechnical triaxial test, which avoids direct contact between a person and a soil sample by using the tool, and can synchronously and quickly complete the installation of the rubber band through the tool, so that the manual disturbance of the soil sample is reduced, and test data is closer to a real result.
In order to achieve the purpose, the invention adopts the technical scheme that:
a rubber band mounting tool in a rock-soil triaxial test comprises a contraction platform support, a rubber band contraction platform, a control handle and a rotating shaft, wherein the rubber band contraction platform is of a ring structure, a plurality of push rods are uniformly distributed on the upper top surface of the rubber band contraction platform along the circumferential direction, the contraction platform support is of an annular cover structure and covers the rubber band contraction platform, an opening is formed in the same vertical position of the contraction platform support and the rubber band contraction platform, the upper top surface of the rubber band contraction platform is connected with the inner top surface of the contraction platform support through a first spring, a plurality of open grooves matched with the push rods are formed in the upper top surface of the contraction platform support, a clamping groove is formed in the outer wall of the rubber band contraction platform along the circumferential direction, and clamping nails matched with the clamping grooves are mounted on the inner side wall of the contraction platform support, the bail is semi-circular continuous bail, its horizontal installation, lower base with the draw-in groove slips, and the second spring is a semicircular spring ring, wraps up in the opening of bail, and two control handle are crossed the back and are passed through axis of rotation rotatable coupling, and a shrink control lever is installed to two control handle tail ends, the bail pass through the steel wire with it links to each other to shrink the control lever, the removal speed and the distance of shrink control lever through dentate path control bail prevent too big speed and removal distance from destroying the elasticity and the durability of steel wire, bail, spring.
Further, the width of the opening is 5-7 mm.
Further, the number of the push rods is 4.
Furthermore, the control handle and the platform adopt an incomplete welding connection mode, namely a steel wire channel is arranged between the control handle and the platform.
Furthermore, the radius of the inner circular ring of the shrinkage platform support is determined by the diameter of the soil sample and the thickness of the latex film, and the diameter is determined to ensure that the inner circular ring is not in contact with the outer wall of the soil sample and a certain gap is formed between the inner circular ring and the outer wall of the soil sample when the tool penetrates through the soil sample.
Furthermore, the retractable platform bracket is horizontally provided with a sliding groove or a sliding track along the inner circumferential direction, the second spring is connected with the sliding groove or the sliding track through a sliding shaft, and the sliding shaft is provided with a rivet cap for preventing the sliding shaft from falling off and can be used as a stress point for exerting the elasticity of the spring
The invention has the following beneficial effects:
the direct contact between a person and a soil sample and the longitudinal left-right deviation generated when the person is directly installed are avoided by using a tool, so that the artificial disturbance error in the triaxial test process is reduced; the rubber band can be accurately and rapidly installed at one time through the rubber band contraction platform and the contraction control rod in the tool, and repeated installation of the rubber band can be achieved through controlling the contraction platform support and the contraction control rod.
Drawings
Fig. 1 is a schematic view of the overall structure of a tool for installing a rubber band in a triaxial geotechnical test according to an embodiment of the invention.
Fig. 2 is a schematic view of a rubber band contraction platform in the embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a retractable platform support in an embodiment of the present invention.
FIG. 4 is a detailed view of a continuous staple in an embodiment of the present invention.
FIG. 5 is a schematic diagram of the operation of a continuous staple in an embodiment of the present invention.
Fig. 6 is a detailed view of the working principle of the continuous staple and card slot terminal in the embodiment of the invention.
FIG. 7 is a schematic view of the connection between the rubber band retracting platform and the retracting platform bracket according to the embodiment of the present invention.
FIG. 8 is a schematic view of a control handle of a rubber band installation tool for a rock-soil triaxial test.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
As shown in fig. 1-8, an embodiment of the invention provides a rubber band mounting tool in a rock-soil triaxial test, which comprises a contraction platform support 3, a rubber band contraction platform 4, a control handle 1 and a rotating shaft 2, wherein the rubber band contraction platform 4 is of a circular ring structure, a plurality of push rods 10 are uniformly distributed on the upper top surface of the rubber band contraction platform along the circumferential direction, the contraction platform support 3 is of an annular cover structure and covers the rubber band contraction platform 4, an opening 9 is formed in the same vertical position of the contraction platform support 3 and the rubber band contraction platform 4, the width is generally 5-7mm, and therefore when a rubber band above a soil sample is mounted, the tool can smoothly penetrate through a drain pipe connecting a sample cap with a base. The upper top surface of the rubber band contraction platform 4 is connected with the inner top surface of the contraction platform support 3 through a first spring 6, the upper top surface of the contraction platform support 3 is provided with a plurality of open slots matched with the push rod 10, the outer wall of the rubber band contraction platform 4 is provided with a clamping slot 7 along the circumferential direction, the inner side wall of the contraction platform support 3 is provided with a clamping nail 8 matched with the clamping slot 7, the clamping nail is a semicircular continuous clamping nail which is horizontally arranged, the lower bottom edge of the clamping nail is in sliding connection with the clamping slot, the second spring 13 is a semicircular spring ring, the surface of the continuous clamping nail is designed to be concave in the inner side of the contact surface of the continuous clamping nail and the spring ring, the spring ring is wrapped in the clamping slot, the two control handles 1 are in rotatable connection through a rotating shaft 2 after crossing, the inner sides of the two control handles 1 are provided with a sliding groove, and a contraction control rod 5 is arranged in the sliding groove in a sliding manner, the clamp 8 is connected with the contraction control rod 5 through a steel wire 11, the contraction control rod 5 controls the moving speed and distance of the clamp 8 through a dentate path, and prevents the overlarge speed and moving distance from damaging the elasticity and durability of the steel wire, the clamp and the spring, the contraction platform support 3 is horizontally provided with a sliding groove or a sliding track 14 along the inner circumference direction, the second spring 13 is connected with the sliding groove or the sliding track 14 through a sliding shaft 12, and the sliding shaft 12 is provided with a rivet cap for preventing the sliding shaft from falling off and can be used as a stress point for exerting the elasticity of the spring.
Further, the width of the opening 9 is 5-7 mm.
Further, the number of the push rods 10 is 4.
It is worth noting that the radius of the inner circular ring of the shrinkage platform support is determined by the diameter of the soil sample and the thickness of the latex film, and the diameter is determined to ensure that the inner circular ring is not contacted with the outer wall of the soil sample and a certain gap is formed between the inner circular ring and the outer wall of the soil sample when the tool penetrates through the soil sample;
the specific implementation controls the contraction and expansion of the spring ring at the rear of the staple through the contraction control rod, so that the extension and contraction of the staple can be realized, when the staple is in a contraction state, the rubber band contraction platform finishes instantaneous contraction through the spring connected to the top of the bracket, at the moment, the rubber band loses surrounding support instantaneously, so that the staple retracts quickly (the retraction here means that the rubber band is erected after the contraction of the rubber band installation platform and has no any supporting point capable of bearing force, so the rubber band can begin to restore the original shape according to the elasticity of the rubber band, at the moment, because the mass of the rubber band is small and the space between a horizontal plane and a soil sample is small (< 0.8 mm), and moreover, the elasticity of the rubber band causes a large centripetal force to be generated in the horizontal plane, the speed of the transverse contraction is far greater than the speed of the axial falling, almost neglectable, namely, the transverse contraction is quick, and the rubber band is instantaneously contacted with the soil sample base or a latex mold with pressure, and (3) continuing retraction until the supporting force for the rubber band in the horizontal plane is balanced with the centripetal force, stopping retraction, completing the installation of the rubber band, pushing a push rod above a bracket of the retraction platform after the installation of the rubber band is completed, enabling the rubber band installation platform to extend out of the bracket, and simultaneously controlling a retraction control rod to complete the extension of the staple bolt (the detailed condition is shown in figure 6, the extension of the staple bolt is shown in (a) in figure 6, and the continuous extension of the staple bolt enables the rubber band installation platform to recover the initial state, so that the rubber band can be placed again. ) Thus, the rubber band is installed once, and the installation of all the rubber bands can be realized by circulating the steps.
Example 1
Rubber band for installing and binding lower part of soil sample and base
The first step is as follows: preparing the rubber band for binding the upper end of the soil sample and the pressure cap, and the lower end of the soil sample and the rubber band of the base in advance, and finishing the manufacture of the corresponding rubber band mounting tool according to the structure, and simultaneously enabling the rubber band contraction platform of the tool to be in a completely extending state.
The second step is that: the rubber band is bound on the rubber band contraction platform of the installation tool, and a small part of the rubber band is arranged at the arc part of the contraction platform contacted with the outer side of the platform bracket,
the third step: when the soil sample is reasonably placed on the base and the lower end of the latex film is also installed, the installation tool provided with the rubber band is held by one hand to penetrate through the soil sample, when the base, the latex film and the rubber band are reasonable in position, the installation tool stops moving, and in the process, the soil sample is not in contact with the inner side of the platform support of the installation tool.
The fourth step: promote the shrink control lever to make the bail shrink to drive rubber band shrink platform and retrieve rapidly, at this moment, force the position of rubber band unchangeable through the platform support outside, but because the rubber band loses support around in the twinkling of an eye, can lead to it to retract rapidly, the retraction of here shows after rubber band mounting platform contracts, the rubber band is maked somebody a mere figurehead, there is not any fulcrum of atress, so it can begin the reconversion according to the elasticity of self, at this moment because the quality of rubber band is little and the space of the horizontal plane of space and soil sample is very little (< 0.8 mm), the elasticity of rubber band itself impels to produce a great centripetal force in horizontal plane again. The speed of lateral contraction is much greater than the speed of axial fall, almost negligible. The rubber band is quickly contracted, instantly contacts with a soil sample base or a latex mold with pressure, and is continuously contracted until the supporting force of the rubber band in the transverse horizontal plane is balanced with the centripetal force of the rubber band, the contraction is stopped, and the installation of the rubber band is finished.
The fifth step: the control handle moves the tool to take the tool off the soil sample.
Example 2
Rubber band for installing and binding pressure cap and upper end of soil sample
The first step is as follows: the rubber band is firstly placed on a drain pipe which is connected with the pressure cap and the base, and then the pressure cap is contacted with the upper end of the soil sample through the latex film.
The second step is that: arranging an opening cover of a mounting tool prepared in advance on a drain pipe, but not contacting the drain pipe; and then the rubber band on the drain pipe is placed on the rubber band contraction platform of the installation tool.
The third step: the control handle moves the installation tool, and when the position of the rubber band, the pressure cap and the latex film are reasonable, the contraction control rod is pushed to complete the installation of the rubber band.
The fourth step: the control handle moves the tool to reposition the tool back to the drain position, thereby removing the tool through the drain, thereby completing the installation of a set of tri-axial test bungee cords.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (6)
1. The rubber band mounting tool in the rock-soil triaxial test is characterized by comprising a contraction platform support (3), a rubber band contraction platform (4), a control handle (1) and a rotating shaft (2), wherein the rubber band contraction platform (4) is of a circular ring structure, a plurality of push rods (10) are uniformly distributed on the upper top surface of the rubber band contraction platform along the circumferential direction, the contraction platform support (3) is of an annular cover structure and covers the rubber band contraction platform (4), an opening (9) is formed in the same vertical position of the contraction platform support (3) and the rubber band contraction platform (4), the upper top surface of the rubber band contraction platform (4) is connected with the inner top surface of the contraction platform support (3) through a first spring (6), and a plurality of open grooves matched with the push rods (10) are formed in the upper top surface of the contraction platform support (3), a clamping groove (7) is arranged on the outer wall of the rubber band contraction platform (4) along the circumferential direction, an attachment staple (8) matched with the clamping groove (7) is arranged on the inner side wall of the contraction platform support (3), the attachment staple (8) is a semicircular continuous attachment staple, the lower bottom edge of the horizontal installation is connected with the clamping groove (7) in a sliding way, the second spring (13) is a semicircular spring ring and is wrapped in the opening of the staple bolt (8), the two control handles (1) are rotatablely connected through the rotating shaft (2) after being crossed, the tail ends of the two control handles (1) are provided with a contraction control rod (5), the staple bolt (8) is connected with the contraction control rod (5) through a steel wire, the contraction control rod (5) controls the moving speed and distance of the clamp through the dentate path, and prevents the elasticity and durability of the steel wire, the clamp and the spring from being damaged by the overlarge speed and moving distance.
2. The tool for installing a rubber band in an geotechnical triaxial test according to claim 1, wherein the width of the opening (9) is 5-7 mm.
3. The tool for installing the rubber band in the triaxial geotechnical test according to claim 1, wherein the number of the push rods (10) is 4.
4. The tool for installing the rubber band in the triaxial geotechnical test according to claim 1, wherein the control handle (1) and the platform are connected in an incomplete welding mode, namely, a steel wire channel is arranged between the control handle (1) and the platform.
5. The tool for installing the rubber band in the triaxial geotechnical test of claim 1, wherein the radius of the inner ring of the retractable platform support is determined by the diameter of the soil sample and the thickness of the latex film, and the diameter is determined so that the inner ring does not contact with the outer wall of the soil sample and a certain gap is formed between the inner ring and the outer wall when the tool passes through the soil sample.
6. The rubber band setting tool in the triaxial geotechnical test according to claim 1, wherein said retractable platform bracket (3) is horizontally provided with a sliding groove or rail (14) along an inner circumferential direction, said second spring (13) is connected to the sliding groove or rail (14) through a sliding shaft (12), and said sliding shaft (12) is provided with a rivet cap for preventing the sliding shaft from falling off, which can be a stress point for exerting spring elasticity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910339748.7A CN110006732B (en) | 2019-04-25 | 2019-04-25 | Rubber band's mounting tool among ground triaxial test |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910339748.7A CN110006732B (en) | 2019-04-25 | 2019-04-25 | Rubber band's mounting tool among ground triaxial test |
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| CN110006732B true CN110006732B (en) | 2022-02-15 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278381A (en) * | 2013-06-07 | 2013-09-04 | 山东科技大学 | Triaxial-test soil-sample rubber-membrane rubber band sleeving device and its application method |
| CN106826210A (en) * | 2017-01-09 | 2017-06-13 | 绍兴文理学院 | The erecting device of dual control up and down and its application method of a kind of triaxial test sealing ring |
| CN106903650A (en) * | 2017-01-09 | 2017-06-30 | 绍兴文理学院 | The installation conversion equipment and its application method of a kind of triaxial test rubber membrane sealing ring |
| CN107764629A (en) * | 2017-09-25 | 2018-03-06 | 河海大学 | A kind of geotechnical sample rubber Membrane cover muscle device and its application method |
| CN207764031U (en) * | 2017-12-15 | 2018-08-24 | 河北建筑工程学院 | A kind of triaxial test rubber ring set fixer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100971663B1 (en) * | 2009-09-25 | 2010-07-22 | 주식회사 제우테크노 | Automatic arrangement device of rubber band |
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2019
- 2019-04-25 CN CN201910339748.7A patent/CN110006732B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103278381A (en) * | 2013-06-07 | 2013-09-04 | 山东科技大学 | Triaxial-test soil-sample rubber-membrane rubber band sleeving device and its application method |
| CN106826210A (en) * | 2017-01-09 | 2017-06-13 | 绍兴文理学院 | The erecting device of dual control up and down and its application method of a kind of triaxial test sealing ring |
| CN106903650A (en) * | 2017-01-09 | 2017-06-30 | 绍兴文理学院 | The installation conversion equipment and its application method of a kind of triaxial test rubber membrane sealing ring |
| CN107764629A (en) * | 2017-09-25 | 2018-03-06 | 河海大学 | A kind of geotechnical sample rubber Membrane cover muscle device and its application method |
| CN207764031U (en) * | 2017-12-15 | 2018-08-24 | 河北建筑工程学院 | A kind of triaxial test rubber ring set fixer |
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