CN115754230A - Embankment filling device for geotechnical centrifugal model test - Google Patents
Embankment filling device for geotechnical centrifugal model test Download PDFInfo
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- CN115754230A CN115754230A CN202211392569.8A CN202211392569A CN115754230A CN 115754230 A CN115754230 A CN 115754230A CN 202211392569 A CN202211392569 A CN 202211392569A CN 115754230 A CN115754230 A CN 115754230A
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- 238000012360 testing method Methods 0.000 title claims abstract description 23
- 239000011148 porous material Substances 0.000 claims abstract description 99
- 244000035744 Hura crepitans Species 0.000 claims abstract description 33
- 238000000926 separation method Methods 0.000 claims abstract description 6
- 238000005192 partition Methods 0.000 claims description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 239000004576 sand Substances 0.000 claims description 18
- 229910000755 6061-T6 aluminium alloy Inorganic materials 0.000 claims description 4
- 239000000956 alloy Substances 0.000 claims description 4
- 238000004088 simulation Methods 0.000 abstract description 6
- 238000005429 filling process Methods 0.000 abstract description 5
- 230000001133 acceleration Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
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Abstract
The invention discloses an embankment filling device for a geotechnical centrifugal model test, which comprises a sand box fixed above a model box, wherein a plurality of separation bins corresponding to the size of an embankment model are arranged in the sand box, the bottom of the sand box is provided with an upper layer pore plate, a middle layer pore plate and a lower layer pore plate which are sequentially arranged from top to bottom, the upper layer pore plate and the lower layer pore plate adopt fixed structures, the middle layer pore plate adopts a push-pull sliding structure, the middle layer pore plate is driven by a hydraulic cylinder, when the middle layer pore plate is in an initial state, the middle layer pore plate is staggered with the upper layer pore plate and the lower layer pore plate, and when the middle layer pore plate is pulled out to a set position, the middle layer pore plate is aligned with the upper layer pore plate and the lower layer pore plate. The invention can realize dynamic filling of embankment models with different heights, sizes and slopes in a high acceleration environment, and completes simulation of embankment model filling process under the condition that a centrifugal machine does not stop.
Description
Technical Field
The invention belongs to the technical field of geotechnical centrifugal physical model tests, and particularly relates to an embankment filling device for a geotechnical centrifugal model test.
Background
In geotechnical engineering physical model tests, the filling simulation of the embankment under the prototype stress condition (in the running process of a centrifugal machine) is always a problem which is difficult to solve. The conventional method is used for filling an embankment model after a centrifuge is stopped, but the method is carried out under the condition that the mechanical state in a soil body is not consistent with the actual condition, and the influence of the embankment filling process on a lower foundation is difficult to truly reflect.
In summary, in the technical field of geotechnical centrifugal physical model tests, it is urgently needed to develop an embankment filling device for geotechnical centrifugal model tests, and the device can complete the simulation of an embankment filling process under the condition that a centrifugal machine does not stop.
Disclosure of Invention
The invention provides an embankment filling device for a geotechnical centrifugal model test, which can complete the simulation of an embankment model filling process under the condition that a centrifugal machine does not stop.
The technical scheme adopted by the invention for solving the technical problems in the prior art is as follows: the embankment filling device comprises a sand box fixed above a model box, wherein a plurality of separation bins corresponding to the size of an embankment model are arranged in the sand box, the bottom of the sand box is provided with an upper-layer pore plate, a middle-layer pore plate and a lower-layer pore plate which are sequentially arranged from top to bottom, the upper-layer pore plate and the lower-layer pore plate are of a fixed structure, the middle-layer pore plate is of a push-pull sliding structure, the middle-layer pore plate is driven by a hydraulic cylinder, when the middle-layer pore plate is in an initial state, the middle-layer pore plate is staggered with the upper-layer pore plate and the lower-layer pore plate, and when the middle-layer pore plate is pulled out to a set position, the middle-layer pore plate is aligned with the upper-layer pore plate and the lower-layer pore plate.
And a sand leakage net fixedly connected with the lower-layer pore plate is arranged below the lower-layer pore plate.
The sand box is provided with a front end plate, a rear end plate, a left side plate and a right side plate, the front end plate, the rear end plate and the side plates are all provided with partition plate slots, the partition bins are separated by partition plates, and the partition plates are inserted into the corresponding partition plate slots.
The sand leakage net is fixed on the lower-layer pore plate by adopting a pressing strip and screws.
The lower-layer pore plate is fixed on the model box through bolts.
And a middle-layer pore plate limiting pin is fixed on the lower-layer pore plate.
The front end parts of the lower layer pore plate and the middle layer pore plate protrude out of the front end plate, the hydraulic cylinder is arranged on one side in front of the sand box and connected with the front end part of the middle layer pore plate through two steel wire ropes, each steel wire rope winds through a steering pulley, a steel wire rope positioning pin is arranged beside the steering pulley, and the steel wire rope positioning pin and the steering pulley are both arranged on the lower layer pore plate.
The upper-layer orifice plate is embedded at the bottom of the sand box.
The middle-layer pore plate is made of steel, and the rest parts of the sand box are made of 6061T6 aluminum alloy materials.
The place ahead of front end plate is equipped with the tripod, the tripod rigid coupling is in the front end plate with between the lower floor's orifice plate.
The invention has the advantages and positive effects that: the dynamic filling of the embankment model can be realized in a high-acceleration environment, and the simulation of the embankment model filling process is completed under the condition that a centrifugal machine does not stop. Through set up a plurality of slots on curb plate and front and back end plate, can realize the inside multiple partition of box to realize the embankment model filling of co-altitude not, not equidimension, different slopes, the screen cloth in the different apertures in cooperation bottom can realize the regulation of the height, the slope and the speed of embankment of filling.
Drawings
FIG. 1 is a three-dimensional view of the present invention mounted on a mold box;
FIG. 2 is a three-dimensional view of the present invention;
FIG. 3 is a three-dimensional view of the present invention from below;
FIG. 4 is a top view of a middle layer orifice plate of the present invention in an initial state;
FIG. 5 is a top plan view of the middle layer orifice plate of the present invention being pulled out;
FIG. 6 is a top view of a middle layer orifice plate of the present invention pulled out to a set position.
In the figure: 1. a sand box; 1-1, a front end plate; 1-2, an upper-layer pore plate; 1-3, lower layer pore plate; 1-4, a middle layer pore plate; 1-5, a middle-layer pore plate limiting pin; 1-6, steel wire rope fixing holes; 1-7, a diverting pulley; 1-8, positioning a steel wire rope positioning pin; 1-9, a middle clapboard; 1-10 parts of small partition board; 1-11, a tripod; 1-12, pressing strips; 1-13, a rear end plate; 1-14, side plates; 2. a model box; 3. a hydraulic cylinder; 4. a sand leakage net.
Detailed Description
For a further understanding of the invention, its nature and utility, reference should be made to the following examples, taken in conjunction with the accompanying drawings, in which:
referring to fig. 1 to 6, an embankment filling device for an geotechnical centrifugal model test comprises a sand box 1 fixed above a model box 2, a plurality of separation bins corresponding to the size of an embankment model are arranged in the sand box 1, the bottom of the sand box 1 is provided with an upper-layer orifice plate 1-2, a middle-layer orifice plate 1-4 and a lower-layer orifice plate 1-3 which are sequentially arranged from top to bottom, the upper-layer orifice plate 1-2 and the lower-layer orifice plate 1-3 are both of a fixed structure, the middle-layer orifice plate 1-4 is of a push-pull sliding structure, the middle-layer orifice plate 1-4 is driven by a hydraulic cylinder 3, when the middle-layer orifice plate 1-4 is in an initial state, the middle-layer orifice plate 1-4 is staggered with sand leaking holes of the upper-layer orifice plate 1-2 and the lower-layer orifice plate 1-3, and when the middle-layer orifice plate 1-4 is pulled out to a set position, the middle-layer orifice plate 1-4 is aligned with sand leaking holes of the upper-layer orifice plate 1-2 and the lower-layer orifice plate 1-3.
In this embodiment, a sand leaking net 4 fixedly connected with the lower-layer pore plate 1-3 is arranged below the lower-layer pore plate 1-3 and used for adjusting the shakeout speed. The further improved structure is as follows: the sand leakage net 4 is fixed on the lower-layer pore plate 1-3 by adopting pressing strips 1-12 and screws, so that the sand leakage net 4 can be conveniently replaced, and the requirements of changing the aperture of the sand leakage net 4 and adjusting the sand leakage speed are further met.
In the embodiment, the sand box 1 is provided with a front end plate 1-1, a rear end plate 1-13, and left and right side plates 1-14, and partition plate slots are arranged on the front end plate 1-1, the rear end plate 1-13 and the side plates 1-14; the separation chambers are separated by partition plates, and the partition plates are inserted into the corresponding partition plate slots so as to be convenient for division and adjustment of the separation chambers.
In the embodiment, the lower-layer pore plate 1-3 is fixed on the model box 2 through bolts so as to facilitate the adjustment of the installation position of the sand box 1 and enable the device to be flexibly installed at any position of the model box.
In this embodiment, a middle-layer orifice plate limiting pin 1-5 is fixed on the lower-layer orifice plate 1-3 to limit the pull-out position of the middle-layer orifice plate 1-4, so as to prevent the pull-out length from exceeding the designed length.
In this embodiment, the front end portions of the lower layer pore plate 1-3 and the middle layer pore plate 1-4 protrude out of the front end plate 1-1, the hydraulic cylinders 3 are arranged on one side in front of the sand box 1, each hydraulic cylinder 3 is connected with the front end portion of the middle layer pore plate 1-4 through two steel wire ropes, each steel wire rope is wound around one steering pulley 1-7, a steel wire rope positioning pin 1-8 is arranged beside the steering pulley 1-7, and the steel wire rope positioning pin 1-8 and the steering pulley 1-7 are both installed on the lower layer pore plate 1-4. The upper layer pore plate 1-3 is embedded at the bottom of the sand box 1. The middle-layer pore plate 1-4 is made of steel, other parts of the sand box are made of 6061T6 aluminum alloy materials, and the 6061T6 aluminum alloy materials are characterized by small density and good ductility. In order to enhance the structural stability of the front end plate 1-1, a tripod 1-11 is arranged in front of the front end plate 1-1, and the tripod 1-11 is fixedly connected between the front end plate 1-1 and the lower layer pore plate 1-3.
The following examples illustrate specific applications of the present invention:
an embankment filling device for geotechnical centrifugal model tests comprises a front end plate 1-1 and a rear end plate 1-13, wherein the inner sides of the front end plate 1-1 and the rear end plate 1-13 are provided with a bottom horizontal slot and a vertical partition plate slot, and the front end plate 1-1 and the rear end plate 1-13 are fixed with side plates 1-14 through bolts; the interior of the front end plate 1-1, the rear end plate 1-13 and the side plate 1-14 is provided with a middle partition plate 1-9 and a small partition plate 1-10, and the middle partition plate 1-9 and the small partition plate 1-10 are all contained in the partition plate of the invention; an upper-layer pore plate 1-2 is embedded in a horizontal slot at the bottom of the front end plate 1-1, the rear end plate 1-13 and the side plate 1-14, a middle-layer pore plate 1-4 capable of being pushed and pulled is arranged below the upper-layer pore plate 1-2, a lower-layer pore plate 1-3 is arranged below the middle-layer pore plate 1-4, the lower-layer pore plate 1-3 is a bottom plate of the device, and a plurality of round holes (fixed connecting holes) with the diameter of 18mm are arranged at the front part and the rear part of the lower-layer pore plate 1-3 and are used for being fixed with a model box 2 below the device; the front end of the middle layer pore plate 1-4 is provided with a steel wire rope connecting hole 1-6 with the diameter of 5mm, and the steel wire rope fixing hole 1-6 is used for bolting a steel wire rope and is connected with the front end of the hydraulic cylinder 3; the front end of the lower-layer pore plate 1-3 is provided with a middle-layer pore plate limiting pin 1-5 for blocking the middle-layer pore plate 1-4; the front end of the lower layer pore plate 1-3 is provided with a steel wire rope steering pulley 1-7, and the front part of the steering pulley 1-7 is provided with a steel wire rope positioning pin 1-8 which can prevent the steel wire rope from falling off the steering pulley 1-7.
The front end of the lower-layer pore plate 1-3 is provided with a tripod 1-11 for supporting a front end plate 1-1; the bottom of the lower-layer pore plate 1-3 is provided with a sand leakage net 4, and the sand leakage net 4 is fixed at the bottom of the lower-layer pore plate 1-3 through a pressing strip 1-12.
The small partition boards 1-10 can be increased or decreased in number and adjusted in position according to specific requirements.
Referring to fig. 1, the application example of the present invention is used:
firstly), before use, selecting a sand leakage net 4 with a proper aperture according to specific requirements, and fixing the sand leakage net to the bottom of a lower-layer orifice plate 1-3 through a pressing strip 1-12;
secondly), installing a middle partition plate 1-9 and a small partition plate 1-10 according to specific requirements;
thirdly), the middle-layer pore plate 1-4 is pushed to the rear side of the sand box 1, and the hole at the bottom of the sand box 1 is in a closed state;
fourthly) pouring test sand to be simulated into the sand box according to the design height requirement;
fifthly), hoisting the sand box to the top of the model box 2, and fixing the sand box by using bolts;
sixthly), installing the hydraulic cylinder 3 on the right side of the sand box;
seventhly), the steel wire rope is fixed with the round hole 1-6 at the front end of the middle-layer pore plate 1-4, passes through the hole between the steering pulley 1-7 and the positioning pin 1-8, and is finally fixed with the front end of the hydraulic cylinder 3;
eighthly), integrally hoisting the model box 2 and the embankment filling device into an earth work centrifugal machine, starting the centrifugal machine to a preset acceleration, contracting a cylinder rod of the hydraulic cylinder 3 through a control system, pulling out the middle-layer pore plate 1-4, and enabling sand in the sand box to fall into the model box to complete the simulation test of embankment filling.
Although the preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above-described embodiments, which are merely illustrative and not restrictive, and those skilled in the art can make many modifications without departing from the spirit and scope of the present invention as defined in the appended claims.
Claims (10)
1. The embankment filling device for the geotechnical centrifugal model test is characterized by comprising a sand box fixed above a model box, wherein a plurality of separation bins corresponding to the size of an embankment model are arranged in the sand box, the bottom of the sand box is provided with an upper layer pore plate, a middle layer pore plate and a lower layer pore plate which are sequentially arranged from top to bottom, the upper layer pore plate and the lower layer pore plate are of fixed structures, the middle layer pore plate is of a push-pull sliding structure and driven by a hydraulic cylinder, when the middle layer pore plate is in an initial state, the middle layer pore plate is staggered with the upper layer pore plate and the lower layer pore plate, and when the middle layer pore plate is pulled out to a set position, the middle layer pore plate is aligned with the upper layer pore plate and the lower layer pore plate.
2. The embankment filling device for the geotechnical centrifugal model test according to claim 1, wherein a sand leakage net is fixedly connected with the lower-layer pore plate below the lower-layer pore plate.
3. The embankment filling device for the geotechnical centrifugal model test according to claim 1, wherein the sand box is provided with a front end plate, a rear end plate and left and right side plates, partition slots are arranged on the front end plate, the rear end plate and the side plates, the partition bins are separated by partition plates, and the partition plates are inserted into the corresponding partition slots.
4. The embankment filling device for the geotechnical centrifugal model test according to claim 2, wherein the sand leakage net is fixed on the lower-layer pore plate through pressing strips and screws.
5. The embankment filling device for the geotechnical centrifugal model test according to claim 1, wherein the lower-layer pore plate is fixed on the model box through bolts.
6. The embankment filling device for the geotechnical centrifugal model test according to claim 1, wherein a middle-layer pore plate limiting pin is fixed on the lower-layer pore plate.
7. The embankment filling device for the geotechnical centrifugal model test according to claim 1, wherein the front ends of the lower layer pore plate and the middle layer pore plate protrude out of the front end plate, the hydraulic cylinder is arranged on one side in front of the sand box, the hydraulic cylinder is connected with the front end of the middle layer pore plate through two steel wires, each steel wire is wound by a steering pulley, a steel wire positioning pin is arranged beside the steering pulley, and the steel wire positioning pin and the steering pulley are both arranged on the lower layer pore plate.
8. The embankment filling device for geotechnical centrifugal model test according to claim 1, wherein said upper orifice plate is embedded in the bottom of said sand box.
9. The embankment filling device for geotechnical centrifugal model test according to claim 1, wherein said middle layer pore plate is made of steel, and the rest parts of said sand box are made of 6061T6 aluminum alloy material.
10. The embankment filling device for geotechnical centrifugal model test according to claim 7, wherein a tripod is provided in front of said front end plate, and said tripod is fixedly connected between said front end plate and said lower layer orifice plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211392569.8A CN115754230A (en) | 2022-11-08 | 2022-11-08 | Embankment filling device for geotechnical centrifugal model test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211392569.8A CN115754230A (en) | 2022-11-08 | 2022-11-08 | Embankment filling device for geotechnical centrifugal model test |
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| CN115754230A true CN115754230A (en) | 2023-03-07 |
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| CN202211392569.8A Pending CN115754230A (en) | 2022-11-08 | 2022-11-08 | Embankment filling device for geotechnical centrifugal model test |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359907A (en) * | 2011-07-20 | 2012-02-22 | 西南交通大学 | Model differential settlement controlling device of geotechnical centrifuge test |
| CN108827802A (en) * | 2018-09-07 | 2018-11-16 | 长沙理工大学 | A kind of embankment power wet-chemical model experimental provision |
| WO2021008278A1 (en) * | 2019-07-12 | 2021-01-21 | 河南理工大学 | High-speed railway goaf foundation pseudo-dynamic loading model test apparatus and method |
| CN113588921A (en) * | 2021-07-29 | 2021-11-02 | 西南交通大学 | Embankment layered filling device for geotechnical centrifugal model test |
| CN216142758U (en) * | 2021-06-01 | 2022-03-29 | 中铁十八局集团第五工程有限公司 | Visual test device for simulating grouting of grouting holes in different positions of duct piece |
-
2022
- 2022-11-08 CN CN202211392569.8A patent/CN115754230A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359907A (en) * | 2011-07-20 | 2012-02-22 | 西南交通大学 | Model differential settlement controlling device of geotechnical centrifuge test |
| CN108827802A (en) * | 2018-09-07 | 2018-11-16 | 长沙理工大学 | A kind of embankment power wet-chemical model experimental provision |
| WO2021008278A1 (en) * | 2019-07-12 | 2021-01-21 | 河南理工大学 | High-speed railway goaf foundation pseudo-dynamic loading model test apparatus and method |
| CN216142758U (en) * | 2021-06-01 | 2022-03-29 | 中铁十八局集团第五工程有限公司 | Visual test device for simulating grouting of grouting holes in different positions of duct piece |
| CN113588921A (en) * | 2021-07-29 | 2021-11-02 | 西南交通大学 | Embankment layered filling device for geotechnical centrifugal model test |
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