CN210293600U - Vibration table test model box suitable for geotechnical engineering - Google Patents
Vibration table test model box suitable for geotechnical engineering Download PDFInfo
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- CN210293600U CN210293600U CN201920604385.0U CN201920604385U CN210293600U CN 210293600 U CN210293600 U CN 210293600U CN 201920604385 U CN201920604385 U CN 201920604385U CN 210293600 U CN210293600 U CN 210293600U
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Abstract
The utility model discloses a shaking table test mold box suitable for geotechnical engineering belongs to the test equipment field, including outer frame of aluminium shaped steel, toughened glass and flexible material. The flexible material is in the direction perpendicular to the horizontal vibration direction, and the toughened glass is placed in the aluminum section steel groove. Through the mounted position of adjusting the inside aluminium shaped steel of mold box, the utility model discloses can adapt to not unidimensional ground model shaking table in the certain limit experimental. The periphery of the model box is made of organic glass, so that the integration and the test process observation are facilitated, and meanwhile, the model box has the characteristics of free disassembly, assembly, flexible operation, simple components, relatively low manufacturing cost and the like on the basis of meeting the strength and rigidity requirements required by the test.
Description
Technical Field
The utility model relates to a test equipment, concretely relates to shaking table test model case suitable for geotechnical engineering, mainly used carries out the shaking table test to the geotechnical model.
Background
In recent years, with the increase of the number of geotechnical engineering and the frequent occurrence of the earthquake damage of the geotechnical engineering, the problem of the earthquake resistant stability of the geotechnical engineering is increasingly emphasized by people, and a physical model test of a vibration table becomes one of important means for researching the dynamic response and the earthquake resistant stability of the geotechnical engineering. The model box is used as important equipment for geotechnical engineering vibration table tests and mainly aims to provide limited-range loading for geotechnical engineering models and transmit vibration excitation of the vibration table to the geotechnical models. The existing model boxes mainly comprise a layered shear deformation model box, a fixed-wall rigid model box, a flexible model box and the like. However, most of them are too heavy to cause difficulty in moving, and the complex composition structure causes difficulty in flexible assembly and free disassembly of the model box, thereby limiting the convenience and the efficiency of the test of the rock-soil model vibration table. Therefore, when performing a plurality of sets of geotechnical model shaking table tests, the time and economic costs incurred by the model box are not negligible.
Disclosure of Invention
In view of this, the utility model provides an object of the utility model is to provide a shaking table test model case suitable for geotechnical engineering can realize the function that the rigidity model case of flexible inside lining is joined in marriage to rigid boundary through adjusting, equipment aluminium shaped steel and toughened glass is nimble to be operated, can be applied to the shaking table of geotechnical engineering model experimental.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a shaking table test mold box suitable for geotechnical engineering, includes outer frame of aluminium shaped steel, toughened glass and flexible material, and outer frame of aluminium shaped steel includes level, vertical and slant triplex, and the aluminium shaped steel component is connected through right angle connection spare or gasket, and toughened glass places in the aluminium shaped steel recess, and flexible material is in the direction perpendicular with the horizontal vibration direction.
The flexible material was a 40mm thick polystyrene plastic foam board or a 5mm rubber membrane to simulate infinite foundation radiation damping.
In the direction along horizontal vibration, smooth polyvinyl chloride films are adhered to the inner walls of the two sides of the model box, lubricating oil is coated on the surfaces of the polyvinyl chloride films, which are in contact with toughened glass, the rigidization effect of the end part of the model box is reduced by reducing the friction between the films and the toughened glass, and a layer of broken stone is bonded to the bottom of the model box to increase the frictional resistance between the bottom of the model box and a model foundation and prevent the model box and the model foundation from sliding relatively in the vibration process.
The utility model provides a pair of shaking table test method suitable for geotechnical engineering specifically includes following step:
1. determining the size of a rock-soil model to be used in the test, and assembling a model box according to the size;
2. installing a model box by using a vibration table;
3. utilizing the assembled rock-soil mold body and foundation mold body with the designed sizes for the model box loading test, and embedding corresponding measuring elements in advance;
4. and standing and maintaining the built die body in the die box for several days according to the test requirements, and loading corresponding seismic waveforms.
Preferably, in step 1, the method further comprises the following sub-steps:
① drawing corresponding contour lines of the positions of the embedded measuring elements outside the toughened glass at two sides of the model box according to a test scheme specifically drawn by the test;
② the proper flexible lining material and thickness are selected according to the numerical calculation and engineering analogy, equivalent rigidity and equivalent damping to be arranged on the two inner sides of the model box.
Preferably, in step 3, the thickness and density of the ground mixture compacted by each compaction are specifically quantified according to the actual geological conditions of the geotechnical model.
Preferably, in ② of step 1, the flexible material is that a 40mm polystyrene plastic foam board or a 5mm rubber film is placed on the inner walls of the front and back sides of the model box in the direction perpendicular to the horizontal vibration direction, the radiation damping of an infinite foundation is simulated, smooth polyvinyl chloride films are pasted on the inner walls of the two sides of the model box in the direction along the horizontal vibration direction, the surfaces of the polyvinyl chloride films, which are in contact with the toughened glass, are coated with lubricating oil, the friction between the films and the toughened glass is reduced to reduce the stiffening effect of the end part of the model box, and a layer of broken stone is bonded on the bottom of the model box to increase the frictional resistance between the bottom of the model box and the model foundation, so that the relative sliding between the model box and the model foundation in the vibration process is prevented.
The utility model also provides a shaking table test model case suitable for geotechnical engineering for realize step 1 to 4 the method, form by aluminium shaped steel and toughened glass equipment, connect with right angle connector or backing plate between the aluminium shaped steel, toughened glass places in the aluminium shaped steel recess.
Compared with the prior art, the utility model, it is showing the advantage and lies in: the utility model discloses can be through adjusting the concrete position of the inside aluminium shaped steel of mold box, realize that the rigid boundary joins in marriage the loading of the rigid mold box of flexible lining cutting, pass and carry the function, can be applied to the shaking table of ground model experimental, all adopt transparent material be convenient for integration and observation test's whole process all around, but this mold box has free dismantlement, equipment, the flexible operation, characteristics such as component part is simple and manufacturing cost low relatively simultaneously on the basis that satisfies experimental required intensity and rigidity requirement.
Additional advantages, objects, and features of the invention 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 invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic side elevation structure of a model box of the present invention;
FIG. 2 is a schematic top view of the model box of the present invention;
fig. 3 is a simplified schematic diagram of a typical geotechnical engineering model (tunnel is taken as an example).
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings; it should be understood that the preferred embodiments are for purposes of illustration only and are not intended to limit the scope of the present invention.
Reference numerals in the drawings of the specification include: the device comprises an aluminum section steel vertical part 1, toughened glass 2, a flexible material 3, a connecting gasket 4, a right-angle connecting piece 5, a vibration table top 6, a power output device 7, a tunnel die body 8, a foundation die body 9, an aluminum section steel horizontal part 10 and an aluminum section steel inclined part 11.
The basic conditions of the embodiment are shown in attached figure 3. the utility model discloses a vibration table test model box suitable for geotechnical engineering, when designing the model box used in the test, the requirements of ① vibration table size and bearing capacity are considered, the table size is 1.6m multiplied by 1.2m, the weight is 1500kg, ② facilitates the observation of the test process, because the geotechnical engineering model in the test is designed as a plane strain model, the deformation damage process of the geotechnical model can be observed from the two sides of the model box in the vibration direction, ③ sufficient rigidity and strength are ensured, the whole model system has sufficient rigidity and strength to avoid the damage of a cushion layer caused by large deformation in the vibration process, ④ dynamic boundary processing, because of the existence of the rock-soil engineering with semi-infinite length is artificially cut off due to the existence of the rock-soil engineering, the boundary between the cut-off geotechnical model and the model box after the model is cut off, the boundary between the model and the model box is cut off manually, the model is cut off due to the problem that the contact of the model with the plastic film, the plastic film is larger than the plastic film, the plastic film is adhered to reduce the contact with the plastic film, the plastic film is adhered to reduce the size, the damage, the contact with the plastic film, the plastic film is adhered to reduce the plastic film, and the plastic film.
Specifically, the model box is formed by assembling aluminum section steel and toughened glass, the aluminum section steel is connected with each other through a connecting gasket 4 or a right-angle connecting piece 5, and the toughened glass is placed in a groove of the aluminum section steel. The function of flexibly operating the rigid model box with the rigid boundary matched with the flexible material 3 can be realized by adjusting and assembling the aluminum section steel and the toughened glass, and the device can be applied to a vibration table test of a rock-soil model.
The inner wall of the model box in the embodiment is provided with a flexible material 3 with certain strength and thickness so as to eliminate the boundary reflection effect. Specifically, when the rigid function of the model box is realized, in order to eliminate the boundary reflection effect, polystyrene plastic foam plates with the thickness of 40mm are additionally arranged on the inner walls of the front side and the rear side of the model box in the direction vertical to the horizontal vibration direction; in addition, smooth polyvinyl chloride films are adhered to the inner walls of the two sides of the model box in the direction along the horizontal vibration, and lubricating oil is coated on the surfaces of the polyvinyl chloride films, which are in contact with the toughened glass.
Set up down below the utility model is suitable for a vibration table test method of geotechnical engineering, this vibration table test has designed a geotechnical tunnel die body and a ground die body respectively to research their accumulated damage characteristic and failure mode under multistage earthquake effect.
The method specifically comprises the following steps:
1. determining the size of a rock-soil tunnel model to be used in the test, and assembling a model box according to the size;
2. installing a model box by using a vibration table;
① drawing corresponding contour lines of the positions of the embedded measuring elements outside the toughened glass 2 at two sides of the model box according to a test scheme specifically drawn by the test;
② selecting proper flexible lining material and thickness according to numerical calculation and engineering analogy, equivalent rigidity and equivalent damping, arranging 40mm polystyrene plastic foam plates or 5mm rubber films on the inner walls of the front and back sides of the model box in the direction perpendicular to the horizontal vibration direction to simulate infinite foundation radiation damping, adhering smooth polyvinyl chloride films on the inner walls of the two sides of the model box in the direction along the horizontal vibration direction, coating lubricating oil on the surfaces of the polyvinyl chloride films in contact with toughened glass to reduce the stiffening effect of the end part of the model box, and adhering a layer of crushed stone on the bottom of the model box to increase the frictional resistance between the bottom of the model box and the model foundation and prevent the model box and the model foundation from sliding relatively in the vibration process.
3. Loading the rock-soil tunnel mold body 8 and the foundation mold body 9 with the corresponding sizes by using the assembled model box, and pre-burying corresponding measuring elements;
① the thickness and density of the ground mixture compacted and rolled each time should be specifically quantified according to the actual geological conditions of the geotechnical tunnel model.
4. And placing the built rock soil and tunnel mold body in a mold box according to the test requirements, standing and maintaining for several days, loading corresponding seismic waveforms, recording data and completing the test.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (3)
1. The utility model provides a shaking table test model case suitable for geotechnical engineering which characterized in that: including outer frame of aluminium shaped steel, toughened glass and flexible material, outer frame of aluminium shaped steel includes level, vertical and slant triplex, and the aluminium shaped steel component is connected through right angle connecting piece or gasket, and toughened glass places in the aluminium shaped steel recess, and flexible material is in the direction perpendicular with the horizontal vibration direction.
2. The vibrating table test model box adapted for geotechnical engineering according to claim 1, wherein: the flexible material was a 40mm thick polystyrene plastic foam board or a 5mm rubber membrane to simulate infinite foundation radiation damping.
3. The vibrating table test model box adapted for geotechnical engineering according to claim 1, wherein: in the direction along horizontal vibration, smooth polyvinyl chloride films are adhered to the inner walls of the two sides of the model box, lubricating oil is coated on the surfaces of the polyvinyl chloride films, which are in contact with toughened glass, the rigidization effect of the end part of the model box is reduced by reducing the friction between the films and the toughened glass, and a layer of broken stone is bonded to the bottom of the model box to increase the frictional resistance between the bottom of the model box and a model foundation and prevent the model box and the model foundation from sliding relatively in the vibration process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920604385.0U CN210293600U (en) | 2019-05-05 | 2019-05-05 | Vibration table test model box suitable for geotechnical engineering |
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| CN201920604385.0U CN210293600U (en) | 2019-05-05 | 2019-05-05 | Vibration table test model box suitable for geotechnical engineering |
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| CN210293600U true CN210293600U (en) | 2020-04-10 |
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| CN201920604385.0U Expired - Fee Related CN210293600U (en) | 2019-05-05 | 2019-05-05 | Vibration table test model box suitable for geotechnical engineering |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683695A (en) * | 2021-01-06 | 2021-04-20 | 四川农业大学 | Simple direct shearing device for root-soil complex and using method |
| CN112816659A (en) * | 2021-01-06 | 2021-05-18 | 西南交通大学 | Variable multi-functional assembled light ground proof box of boundary rigidity |
| CN113156088A (en) * | 2021-05-08 | 2021-07-23 | 北京工业大学 | Visual rigid model box for saturated soft sediment deformation simulation earthquake test |
-
2019
- 2019-05-05 CN CN201920604385.0U patent/CN210293600U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683695A (en) * | 2021-01-06 | 2021-04-20 | 四川农业大学 | Simple direct shearing device for root-soil complex and using method |
| CN112816659A (en) * | 2021-01-06 | 2021-05-18 | 西南交通大学 | Variable multi-functional assembled light ground proof box of boundary rigidity |
| CN112816659B (en) * | 2021-01-06 | 2021-11-26 | 西南交通大学 | Variable multi-functional assembled light ground proof box of boundary rigidity |
| CN112683695B (en) * | 2021-01-06 | 2023-06-30 | 四川农业大学 | Simple direct shearing device for root soil complex and use method |
| CN113156088A (en) * | 2021-05-08 | 2021-07-23 | 北京工业大学 | Visual rigid model box for saturated soft sediment deformation simulation earthquake test |
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Granted publication date: 20200410 Termination date: 20210505 |