CN219455650U - Saturated sand slope system appearance device - Google Patents
Saturated sand slope system appearance device Download PDFInfo
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- CN219455650U CN219455650U CN202320662306.8U CN202320662306U CN219455650U CN 219455650 U CN219455650 U CN 219455650U CN 202320662306 U CN202320662306 U CN 202320662306U CN 219455650 U CN219455650 U CN 219455650U
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Abstract
The utility model relates to a saturated sand inclined sample preparation device, and belongs to the technical field of indoor geotechnical tests. The sample preparation device comprises a platform which is horizontally arranged, an outer box with an open top is arranged on the platform, an outer box angle adjusting device is arranged at the bottom of the outer box to adjust the inclination angle of the outer box relative to the platform, an inner box with an open top is arranged in the outer box, an inner box angle adjusting device is arranged at the bottom of the inner box to adjust the inclination angle of the inner box relative to the outer box, and the outer box angle adjusting device and the inner box angle adjusting device can achieve continuous angle adjustment. The sample preparation device can realize the random change of the included angle between the shearing surface and the deposition surface in a designated interval, can realize sand sample preparation under the anhydrous and saturated water conditions, and can be used for researching the shear strength characteristics of any shearing surface of the anisotropic particle material.
Description
Technical Field
The utility model belongs to the technical field of indoor geotechnical tests, and relates to a saturated sand inclined sample preparation device.
Background
Soil is particles with large differences formed by rocks under the weathering effect, and sediments generated in various natural environments are produced by different carrying modes. In nature, irregular soil particles are generally arranged according to a certain rule under the influence of external actions such as gravity and the like to form a plurality of deposition surfaces. The deposition surface of the soil body in nature is often inclined along a certain angle instead of being horizontal under the influence of factors such as topography, hydrology and geological movement.
A large number of experimental researches at home and abroad show that: the peak stress ratio or peak internal friction angle at which the anisotropic material breaks is related to the large principal stress direction angle (i.e., the angle between the large principal stress-acting surface and the deposition surface) δ.
Mahmood and j.k.mitchell found by direct shear test: when the deposition surface is perpendicular to the shearing surface, the powder sand strength is 30% higher than that when the two surfaces are parallel; the straight shearing instrument after P.J. Guo improvement can enable the included angle between the deposition surface and the shearing surface to continuously change within the range of 0-90 degrees; the p.fu and y.f.dafalia propose that the definition of the angle ψ between the shear plane and the deposition plane should be 0 ° to 180 ° taking into account the directionality of the shear deformation. By performing two-dimensional discrete element numerical simulations on elongated particles, p.fu and y.f. dafalia give an approximate plot of shear strength versus ψ, and it was found that the strength peaks occur at positions ψ≡115 ° instead of ψ≡90 °. However, the research is limited to two-dimensional discrete element simulation of a specific ideal particle shape, and the environment of the sample is a dry environment, so that the applicability of the relation to the natural deposition of the actual sand material in the seabed rich water environment is still to be researched.
At present, the mechanical research on the inclination angle of the soil-containing particles at home and abroad is less and is limited by the difficulty and defects of deep sea seabed on-site coring and in-situ experiment technology, so that a sand body inclination sample preparation device capable of realizing the water saturation condition is necessary to be designed.
Disclosure of Invention
In view of the above, an object of the present utility model is to provide a saturated sand inclined sample preparation device for wet-process sample preparation.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
the utility model provides a saturated sand slope system appearance device, is including the platform that is the level setting, is equipped with the open outer case in top on the platform, and the bottom of outer case is equipped with outer case angle adjustment device in order to adjust the inclination of outer case for the platform, is equipped with the open inner box in top in the outer case, and the bottom of inner box is equipped with inner box angle adjustment device in order to adjust the inclination of inner box for the outer case, and outer case angle adjustment device and inner box angle adjustment device can realize the continuous adjustment of angle.
Optionally, the outer box angle adjusting device includes hinge support and elevating gear that set up respectively at outer box bottom both ends, and the hinge support is including setting up in outer box both sides relatively and with platform fixed connection's supporting seat and with outer box width direction parallel and with supporting seat and outer box rotation connection's pivot, elevating gear includes the elevating system who sets up in outer box both sides relatively, elevating system installs on the slider, slider and the setting on the platform and with outer box length direction parallel slide rail sliding connection.
Optionally, a bearing is arranged between the supporting seat and the rotating shaft.
Optionally, the lifting mechanism comprises a jack, the top of the jack is provided with a limiting hole parallel to the width direction of the outer box, and a limiting shaft rotationally connected with the outer box is arranged in the limiting hole.
Optionally, a bearing is arranged between the limiting hole and the limiting shaft.
Optionally, the slider is provided with a locking screw in threaded connection therewith to limit the position of the slider relative to the slide rail.
Optionally, the inner box angle adjusting device is located in the middle of the inner box, and comprises mounting seats which are oppositely arranged on two sides of the inner box, wherein the mounting seats are arranged on the outer box, a rotating motor is arranged on the mounting seats, and an output shaft of the rotating motor is connected with a transmission shaft which is fixed on the inner box and is parallel to the width direction of the outer box.
Optionally, the mounting seat is a lifting bracket with a lifting function or a stand column with a fixed height.
Alternatively, the outer case is transparent to the pair of side plates in the length direction, and the inner case is transparent to the pair of side plates in the length direction of the outer case.
Optionally, the outer box is provided with a transparent box cover, and the box cover is buckled at the top of the outer box.
Optionally, the bottom of the outer box is provided with a water injection and drainage hole and a water injection and drainage system connected with the water injection and drainage hole, the bottom of the inner box is provided with a water drainage hole, and a water drainage valve is arranged at the water drainage hole.
The sample preparation device can be used for dry sample preparation and wet sample preparation:
the dry method sample preparation comprises the following steps:
s1, placing a shearing box with a box cover removed into an inner box;
s2, adjusting the inner box to a target angle;
s3, enabling sand particles to freely fall into the shearing box by adopting a sand rain method at a certain distance right above the inner box until the shearing box is filled, and then standing for a certain time;
s4, covering a box cover of the shearing box, and cleaning out sand outside the shearing box;
s3, adjusting the inner box to be horizontal, and taking out the shearing box;
the wet method sample preparation comprises the following steps:
s1, placing a shearing box with a box cover removed into an inner box;
s2, injecting water into the inner tank and the outer tank until the inner tank is submerged;
s3, adjusting the inner box to a target angle;
s4, enabling sand particles to freely fall into the inner box by adopting a sand rain method at a certain distance right above the inner box, and enabling the sand particles to enter the interior of the shearing box under the action of a water body until the shearing box is filled;
s5, evacuating water in the inner tank and the outer tank, and standing for a certain time;
s6, covering a box cover of the shearing box, and cleaning out sand outside the shearing box;
s7, adjusting to be horizontal, and taking out the shearing box.
The utility model has the beneficial effects that:
1. multiple inclined sample preparation schemes can be realized, the inclined angle has great combination capacity, the working condition of a dry environment (anhydrous) or under the condition of water content (saturated water) can be simulated, the control of multiple inclined angles under the anhydrous/saturated water state is realized, and then the required sample state can be prepared according to the working condition requirement.
2. The inclination of the sample preparation device is easy to control, and the angle adjustment range of the sample preparation device is larger through the superposition of the inclination of the outer box and the inner box, and the sample preparation device is simple and compact in structure and strong in operability.
Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.
Drawings
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:
FIG. 1 is a front view of a sample preparation device of the present utility model;
FIG. 2 is a state diagram of a sample preparation device according to the present utility model;
FIG. 3 is a second state diagram of the sample preparation device of the present utility model;
FIG. 4 is a top view of the sample preparation device of the present utility model;
FIG. 5 is a side view of the sample preparation device of the present utility model.
Reference numerals: platform 1, slide rail 2, supporting seat 3, pivot 4, left side outer case board 5, case lid 6, right side outer case board 7, hinge structure 8, jack 9, slider 10, locking screw 11, ball 12, outer bottom plate 13, left side inner case board 21, right side inner case board 22, inner bottom plate 23, rotating electrical machines 24, mount pad 25, annotate drainage hole 31, spacing axle 81, sample 100, transmission shaft 241.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.
Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.
Referring to fig. 1 to 5, a saturated sand tilting sample preparation device comprises a platform 1 which is horizontally arranged, wherein an outer box with an open top is arranged on the platform 1, an outer box angle adjusting device is arranged at the bottom of the outer box to adjust the tilting angle of the outer box relative to the platform, an inner box with an open top is arranged in the outer box, an inner box angle adjusting device is arranged at the bottom of the inner box to adjust the tilting angle of the inner box relative to the outer box, and the outer box angle adjusting device and the inner box angle adjusting device can realize continuous angle adjustment.
The outer box angle adjusting device can be of the following structure: the device comprises a hinged support and a lifting device which are respectively arranged at two ends of the bottom of an outer box, wherein the hinged support comprises a supporting seat 3 which is oppositely arranged at two sides of the outer box and fixedly connected with a platform 1, and a rotating shaft 4 which is parallel to the width direction of the outer box and is rotationally connected with the supporting seat 3 and the outer box; a bearing can be arranged between the supporting seat 3 and the rotating shaft 4; the lifting device comprises lifting mechanisms which are oppositely arranged on two sides of the outer box, the lifting mechanisms are arranged on the sliding blocks 10, the sliding blocks 10 are in sliding connection with the sliding rails 2 which are arranged on the platform 1 and are parallel to the length direction of the outer box, balls 12 can be arranged between the sliding blocks 10 and the sliding rails 2 to reduce friction, and locking screws 11 which are in threaded connection with the sliding blocks 10 are arranged on the sliding blocks 10 to limit the positions of the sliding blocks 10 relative to the sliding rails 2.
The height of the lifting mechanism is adjustable and can be of the following structure: the lifting structure of the jack is suitable to select a structure of a screw nut pair principle, the top of the jack 9 is provided with a limiting hole parallel to the width direction of the outer box, and a limiting shaft 81 which is rotationally connected with the outer box is arranged in the limiting hole. A bearing may also be provided between the limiting hole and the limiting shaft 81.
The inner box angle adjusting device can be of the following structure: the middle part that is located the inner box, including setting up the mount pad 25 in the inner box both sides relatively, mount pad 25 installs on the outer box, is equipped with rotating electrical machines 24 on the mount pad 25, and rotating electrical machines 24's output shaft is connected with the transmission shaft 241 that is fixed on the inner box and is parallel with outer box width direction. The mounting seat 25 is a lifting bracket with a lifting function or a stand column with a fixed height.
Optionally, the bottom of the outer box is provided with a water injection and drainage hole 31 and a water injection and drainage system connected with the water injection and drainage hole 31, the bottom of the inner box is provided with a water drainage hole, and a water drainage valve is arranged at the water drainage hole; the outer box is provided with a transparent box cover 6 to cover the open top; the outer case is transparent to a pair of side plates in the longitudinal direction, and the inner case is transparent to a side plate in the longitudinal direction of the outer case, so that the stacking form of the samples 100 in the case can be observed.
The sample preparation device can be used for dry sample preparation and wet sample preparation:
the dry method sample preparation comprises the following steps:
s1, placing a shearing box with a box cover removed into an inner box;
s2, adjusting the inner box to a target angle;
s3, enabling sand particles to freely fall into the shearing box by adopting a sand rain method at a certain distance right above the inner box until the shearing box is filled, covering a box cover 6, and standing for a certain time t1, wherein t1 is 05-1 h;
s4, covering a box cover of the shearing box, and cleaning out sand outside the shearing box;
s5, adjusting the inner box to be horizontal, and taking out the shearing box;
the wet method sample preparation comprises the following steps:
s1, placing a shearing box with a box cover removed into an inner box;
s2, injecting water into the inner tank and the outer tank until the inner tank is submerged;
s3, adjusting the inner box to a target angle;
s4, enabling sand particles to freely fall into the inner box by adopting a sand rain method at a certain distance right above the inner box, and enabling the sand particles to enter the interior of the shearing box under the action of a water body until the shearing box is filled;
s5, evacuating water in the inner box and the outer box, covering the box cover 6, and standing for a certain time t2, wherein t2 is 05-1 h;
s6, covering a box cover of the shearing box, and cleaning out sand outside the shearing box;
and S7, adjusting the inner box to be horizontal, and taking out the shearing box.
The deformation and strength of the anisotropic particulate material is related to the shear direction or the direction of action of the large principal stresses relative to the deposition direction. The sample preparation device can realize the random change of the included angle between the shearing surface and the deposition surface in a designated interval, can realize sand sample preparation under the anhydrous and saturated water conditions, and can be used for researching the shear strength characteristics of any shearing surface of the anisotropic particle material.
Examples
A saturated sand tilting sample preparation device mainly comprises a platform 1, a sliding rail 2, a sliding block 10, an outer box, an inner box, a supporting seat 3, a rotating shaft 4, a hinge structure 8, a limiting shaft 81, a jack 9, a rotating motor 24, a mounting seat 25 and a transmission shaft 241. The outer box comprises an outer box bottom plate 13, a left outer box plate 5 and a right outer box plate 7 which are positioned at two ends of the outer box bottom plate 13, a pair of outer box side plates positioned at two sides of the outer box bottom plate 13 and a box cover 6 buckled at the top of the outer box, wherein the outer box side plates and the box cover 6 are made of transparent toughened glass. The inner box comprises an inner box bottom plate 23, left inner box plates 21 and right inner box plates 22 positioned at two ends of the inner box bottom plate 23, and a pair of inner box side plates positioned at two sides of the inner box bottom plate 23, wherein the inner box side plates are made of transparent toughened glass. One end of the outer box is hinged on the horizontally arranged platform 1 through a hinged support, and the hinged support comprises a supporting seat 3 which is oppositely arranged on two sides of the outer box and fixedly connected with the platform 1, and a rotating shaft 4 which is parallel to the width direction of the outer box and is rotationally connected with the supporting seat 3 and the outer box. The lifting device is connected to the other end of outer box, and lifting device is including installing the jack 9 on slider 10, and the top of jack is equipped with hinge structure 8, and hinge structure 8 is including setting up the bearing frame on jack 9, installs the bearing in the bearing hole of bearing frame, and the inner circle of bearing rotates the spacing axle 81 fixed connection of being connected with the outer box. The inner box is installed in the outer box through inner box angle adjusting device, and inner box angle adjusting device is located the bottom middle part of inner box, including setting up the mount pad 25 in the inner box both sides relatively, mount pad 25 is the lifting support that has the lifting function, installs on the outer box bottom plate 13 of outer box, is equipped with rotating electrical machines 24 on the mount pad 25, and rotating electrical machines 24's output shaft is connected with the transmission shaft 241 that fixes on the inner box and be parallel with outer box width direction. The outer box bottom plate 13 is provided with a water injection and drainage hole 31 and a water injection and drainage system connected with the water injection and drainage hole 31, wherein the water injection and drainage system comprises a water injection and drainage pipe with one end connected with the water injection and drainage hole, and the other end of the water injection and drainage pipe is connected with a water pump.
The sealing performance of the inner box and the outer box is high, and the sealing water-retaining treatment is needed, so that the liquid in the inner box is not leaked.
The inner tank bottom plate 23 is a first plane, and the outer tank bottom plate 13 is a second plane. The throwing height of sand particles is strictly controlled, more angle control can be realized by controlling the combination of the inclination angles of the second plane and the first plane through a control instrument, so that the thrown sand is piled up and formed, the prepared samples are uniformly distributed under the target inclination angle, and the control of the internal piling form of the materials is realized through the control of the inclination angle and the water content of the sample depositing surface. The device can carry out standardized treatment on the molding process of the geotechnical sample, can strictly control the direction of the deposition surface of the sample, reduces the influence of manual operation on the sample preparation quality in the sample preparation process, and improves the repeatability of sample preparation and the stability of the mechanical properties of the sample.
The device can realize multiple inclined sample preparation schemes, has great combination capacity on an inclined angle, and can simulate the working condition of a dry environment (no water) or a water-containing condition (full water). The required sample state can be prepared according to the working condition requirement.
The device can be used for manufacturing solid anhydrous/saturated sand samples such as direct shear samples, consolidation samples, triaxial samples and the like required by direct shear tests, consolidation tests and triaxial tests, and can be used for obtaining hollow cylindrical samples through further cutting according to requirements, so that the hollow cylindrical torsional shear test can be basically satisfied, and support is provided for the hollow cylindrical torsional shear test.
For the direct shear sample, the consolidation sample, the triaxial sample and the like which can be prepared, the related steps of putting in and taking out the shear box can be omitted in the operation steps, sand particles are firstly deposited in the inner box according to a certain angle, then sampling is carried out by using a ring cutter or other sampling/coring tools, then cutting is carried out, and then the loading test is carried out by putting in respective instruments.
Sampling/coring and sample cutting, and cutting the extracted geotechnical sample into a cylinder shape by adopting common geotechnical sample preparation tools such as geotechnical knives, steel wire bows and the like for experimental study. The cylindrical sample may be further coring with a coring bit to form a hollow cylindrical sample.
The differences between the direct shear sample, the consolidated sample, the triaxial sample, and the hollow cylindrical sample are mainly in the shape and size of the sample, and not in the sample itself obtained by preparing the sample. The sample preparation device is of a size sufficient to accommodate a sample of the above size. According to different needs of research, the sampling/coring and sample cutting are adopted.
The utility model can realize the quantitative control of the inclination angle of the deposition surface of the sample, and is suitable for preparing the layered sample; the method can also be used together with the prior geotechnical sample preparation technology (sample cutting method, coring method and the like) to solve the preparation problem of sand samples with inclined deposition surfaces.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.
Claims (10)
1. Saturated sand slope system appearance device, its characterized in that: including being the platform that the level set up, be equipped with the open outer case in top on the platform, the bottom of outer case is equipped with outer case angle adjusting device in order to adjust the inclination of outer case for the platform, is equipped with the open inner box in top in the outer case, and the bottom of inner box is equipped with inner box angle adjusting device in order to adjust the inclination of inner box for the outer case, and outer case angle adjusting device and inner box angle adjusting device can realize the continuous adjustment of angle.
2. The saturated sand tilting sampling device according to claim 1, wherein: the outer box angle adjusting device comprises hinge supports and lifting devices, wherein the hinge supports and the lifting devices are respectively arranged at two ends of the bottom of the outer box, each hinge support comprises supporting seats which are oppositely arranged at two sides of the outer box and fixedly connected with a platform, a rotating shaft which is parallel to the width direction of the outer box and is rotationally connected with the supporting seats and the outer box, each lifting device comprises lifting mechanisms which are oppositely arranged at two sides of the outer box, each lifting mechanism is arranged on a sliding block, each sliding block is slidably connected with a sliding rail which is arranged on the platform and is parallel to the length direction of the outer box, and locking screws which are in threaded connection with the sliding blocks are arranged on the sliding blocks so as to limit the positions of the sliding blocks relative to the sliding rails.
3. The saturated sand tilting sampling device according to claim 2, wherein: a bearing is arranged between the supporting seat and the rotating shaft.
4. The saturated sand tilting sampling device according to claim 2, wherein: the lifting mechanism comprises a jack, the top of the jack is provided with a limiting hole parallel to the width direction of the outer box, and a limiting shaft in rotary connection with the outer box is arranged in the limiting hole.
5. The saturated sand tilting sampling device of claim 4, wherein: a bearing is arranged between the limiting hole and the limiting shaft.
6. The saturated sand tilting sampling device according to claim 1, wherein: the inner box angle adjusting device is located in the middle of the inner box and comprises mounting seats which are oppositely arranged on two sides of the inner box, the mounting seats are arranged on the outer box, a rotating motor is arranged on the mounting seats, and an output shaft of the rotating motor is connected with a transmission shaft which is fixed on the inner box and is parallel to the width direction of the outer box.
7. The saturated sand tilting sampling device of claim 6, wherein: the mounting seat is a lifting bracket with a lifting function or a stand column with a fixed height.
8. The saturated sand tilting sampling device according to claim 1, wherein: the outer case is transparent corresponding to a pair of side plates in the length direction, and the inner case is transparent corresponding to a pair of side plates in the length direction of the outer case.
9. The saturated sand tilting sampling device according to claim 1, wherein: the outer box is provided with a transparent box cover, and the box cover is buckled at the top of the outer box.
10. The saturated sand tilting sampling device according to claim 1, wherein: the bottom of the outer box is provided with a water injection and drainage hole and a water injection and drainage system connected with the water injection and drainage hole, the bottom of the inner box is provided with a water drainage hole, and a water drainage valve is arranged at the water drainage hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320662306.8U CN219455650U (en) | 2023-03-29 | 2023-03-29 | Saturated sand slope system appearance device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320662306.8U CN219455650U (en) | 2023-03-29 | 2023-03-29 | Saturated sand slope system appearance device |
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| Publication Number | Publication Date |
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| CN219455650U true CN219455650U (en) | 2023-08-01 |
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| CN202320662306.8U Active CN219455650U (en) | 2023-03-29 | 2023-03-29 | Saturated sand slope system appearance device |
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