CN212956653U - Model test device for discrete material pile composite foundation - Google Patents
Model test device for discrete material pile composite foundation Download PDFInfo
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- CN212956653U CN212956653U CN202020759405.4U CN202020759405U CN212956653U CN 212956653 U CN212956653 U CN 212956653U CN 202020759405 U CN202020759405 U CN 202020759405U CN 212956653 U CN212956653 U CN 212956653U
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Abstract
The utility model discloses a model test device for a discrete material pile composite foundation, which comprises a bottom plate; a plurality of steel pipes all bear on the bottom plate, and each steel pipe upwards stacks gradually to enclose into and hold the chamber, adjacent steel pipe detachably links together. The model test device for the discrete material pile composite foundation utilizes the bottom plate as a bearing platform, and a plurality of steel pipes are detachably spliced and overlapped together, so that the model test device with adjustable height is formed, and the influence of pile length change on the bearing deformation characteristic of the discrete material pile composite foundation is researched and discussed; meanwhile, the detachable connection mode is convenient for model test construction and cleaning work after the test is finished, and is particularly favorable when the model test device is small and has large height.
Description
Technical Field
The utility model relates to a model test device, in particular to a model test device that is used for bulk material stake composite foundation.
Background
The composite foundation treatment technology is an effective foundation treatment means, can give full play to the soil body strength of the natural foundation, effectively coordinates the settlement deformation between the matrix and the reinforcement body, and is widely applied in domestic and foreign engineering practices. For this reason, many scholars have conducted extensive model test studies on the load-bearing deformation characteristics of composite foundations, especially discrete material pile composite foundations. However, according to the existing model test research of the discrete material pile composite foundation, the height of the used model test device is not adjustable, which is not beneficial to research and analysis of the influence of pile length change on the load-bearing deformation characteristic of the discrete material pile composite foundation. Meanwhile, the position of the model test device is fixed, so that the flexibility of the model test is poor. In addition, when the model test device is small and high, the model test device is not beneficial to model test construction and cleaning work after the test is finished.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a model test device for bulk material pile composite foundation, can improve the efficiency and the feasibility research of model test.
According to an embodiment of the first aspect of the present invention, there is provided a model test apparatus for a discrete material pile composite foundation, comprising a bottom plate; a plurality of steel pipes all bear on the bottom plate, and each steel pipe upwards stacks gradually to enclose into and hold the chamber, adjacent steel pipe detachably links together.
Has the advantages that: the model test device for the discrete material pile composite foundation utilizes the bottom plate as a bearing platform, and a plurality of steel pipes are detachably spliced and overlapped together, so that the model test device with adjustable height is formed, and the influence of pile length change on the bearing deformation characteristic of the discrete material pile composite foundation is researched and discussed; meanwhile, the detachable connection mode is convenient for model test construction and cleaning work after the test is finished, and is particularly favorable when the model test device is small and has large height.
According to the utility model discloses a model test device for bulk material pile composite foundation of embodiment of the first aspect, still include mount and pre-buried pipe, the mount is installed outside the steel pipe, the middle part position of mount is equipped with the mounting hole, pre-buried pipe is installed on the mounting hole, the upper end of pre-buried pipe stretches out and holds the chamber outside, the lower extreme of pre-buried pipe extends to the bottom plate, utilize mount and pre-buried pipe to prevent the skew appointed pile body position of bulk material pile and the askew pile phenomenon of appearance, and then ensure the pile-forming quality of bulk material pile, it can accurately reflect the response characteristic of pile body under the load effect to make it.
According to the utility model discloses a model test device for bulk material pile composite foundation, mount include first transverse structure, second transverse structure and sleeve, the mounting hole sets up on the sleeve, the inner of first transverse structure and second transverse structure is fixed respectively in telescopic both sides, the outer end of first transverse structure and second transverse structure all is equipped with the mounting groove, two mounting grooves gomphosis respectively are on the both sides that are located the steel pipe at top, guarantee that the structure of mount is reasonable, make the experiment more scientific.
According to the utility model discloses a model test device for bulk material pile composite foundation of first aspect embodiment, the central axis of the central axis of each steel pipe, mounting hole, the central axis of pre-buried pipe all are in same vertical line, guarantee the accurate response characteristic of simulating out the pile body under the load effect.
According to the utility model discloses a model test device for bulk material pile composite foundation of first aspect embodiment still includes a plurality of otic placodes and a plurality of coupling assembling, and two otic placodes are constituteed to be a set of, and every group otic placode sets up respectively in the concatenation department both sides of adjacent steel pipe, and each coupling assembling detachably installs respectively on each group otic placode, utilizes otic placode and the fixed adjacent steel pipe of coupling assembling, conveniently controls model test device's height.
According to the utility model discloses a model test device for bulk material stake composite foundation of first aspect embodiment, the concatenation department of adjacent steel pipe all is equipped with the sealing washer, avoids the moisture in the foundation soil to ooze and influences the model test research.
According to the utility model discloses a model test device for bulk material pile composite foundation, coupling assembling are the bolt, and it is more convenient to utilize the bolt messenger to dismantle the installation for the embodiment of the first aspect.
According to the utility model discloses a model test device for bulk material pile composite foundation of embodiment of first aspect, the steel pipe includes first steel pipe, third steel pipe and a plurality of second steel pipe, first steel pipe is fixed on the bottom plate, the third steel pipe is located the top, each second steel pipe all sets up between first steel pipe and third steel pipe, each otic placode sets up respectively in the lateral wall top of first steel pipe, the lateral wall bottom of third steel pipe and the top and the bottom of each second steel pipe lateral wall, quantity through control second steel pipe and then the height of control model test device.
According to the utility model discloses a model test device for bulk material pile composite foundation, the structure of first steel pipe and third steel pipe is the same, saves manufacturing cost for the bulk material pile composite foundation of first aspect embodiment.
According to the utility model discloses a model test device for bulk material pile composite foundation of first aspect embodiment still includes walking structure, and walking structure sets up in the bottom of bottom plate, improves the experimental flexibility of model, can promote model test device to suitable position and carry out the model test construction, treats that the model test construction accomplishes the back, moves to the assigned position again and tests the loading.
Drawings
In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.
FIG. 1 is a schematic sectional view of a construction process of a model testing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view of the model testing apparatus after construction according to the embodiment of the present invention;
FIG. 3 is a schematic front view of a model testing apparatus according to an embodiment of the present invention;
fig. 4 is a schematic top view of a model testing apparatus according to an embodiment of the present invention;
fig. 5 is a schematic front view of the fixing frame according to the embodiment of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1 to 5, a model test apparatus for a discrete material pile composite foundation includes a base plate 10; a plurality of steel pipes all bear on bottom plate 10, and each steel pipe upwards stacks gradually to enclose into and hold the chamber, adjacent steel pipe detachably links together. The model test device for the discrete material pile composite foundation utilizes the bottom plate 10 as a bearing platform, and a plurality of steel pipes are detachably spliced and overlapped together, so that the model test device with adjustable height is formed, and the influence of pile length change on the bearing deformation characteristic of the discrete material pile composite foundation is researched and discussed; meanwhile, the detachable connection mode is convenient for model test construction and cleaning work after the test is finished, and is particularly favorable when the model test device is small and has large height.
In this embodiment, the bottom plate 10 is made of square steel plate to ensure the strength of the mold box, the steel pipe is a flat thin-walled tubular structure, and both the bottom plate 10 and the steel pipe are subjected to rust prevention treatment.
In this embodiment, still include walking structure 60, walking structure 60 sets up in the bottom of bottom plate 10, and walking structure 60 includes four bearing wheels, and each bearing wheel sets up respectively in four corners of bottom plate 10, and the bearing wheel is the universal high strength bearing wheel of taking brake function, improves model test's flexibility, can promote model test device to suitable position and carry out model test construction, waits model test construction to accomplish the back, moves to the assigned position again and carries out the test loading.
In this embodiment, still include mount 40 and embedded pipe 50, mount 40 is installed outside the steel pipe for mount 40, the middle part position of mount 40 is equipped with the mounting hole, the mounting hole is located the top of the steel pipe at the top, embedded pipe 50 is installed on the mounting hole, the upper end of embedded pipe 50 stretches out outside holding the chamber, the lower extreme of embedded pipe 50 extends to bottom plate 10, utilize mount 40 and embedded pipe 50 to prevent the skew appointed pile body position of discrete material pile and the askew pile phenomenon of appearing, and then ensure the pile-forming quality of discrete material pile, it can accurately reflect the response characteristic of the pile body under the load effect.
Preferably, the fixing frame 40 includes a first transverse structure 41, a second transverse structure 42 and a sleeve 43, the first transverse structure 41 and the second transverse structure 42 are symmetrically arranged about a central axis of the sleeve 43, the first transverse structure 41 and the second transverse structure 42 are steel bars, the mounting holes are formed in the sleeve 43, inner ends of the first transverse structure 41 and the second transverse structure 42 are respectively fixed to two sides of the sleeve 43, outer ends of the first transverse structure 41 and the second transverse structure 42 are respectively provided with a mounting groove 44, the two mounting grooves 44 are respectively embedded in two sides of a steel pipe located at the top, the central axis of each steel pipe, the central axis of the mounting hole and the central axis of the embedded pipe 50 are respectively located on the same vertical line, the structure of the fixing frame 40 is guaranteed to be reasonable, an experiment is more scientific, and the response characteristic of a pile body under the load action is accurately simulated.
In this embodiment, the connecting member further includes a plurality of ear plates 30 and a plurality of connecting members, in this embodiment, the connecting members are bolts, and the bolts are used to facilitate the disassembly and assembly. The ear plate 30 is a connecting plate with a through hole, and in other embodiments, it may also be a positioning structure such as a boss. Two otic placodes 30 constitute a set of, and every otic placode 30 of group sets up respectively in the concatenation department both sides of adjacent steel pipe to all be equipped with the sealing washer in the concatenation department of adjacent steel pipe, the sealing washer can be rubber circle gasket, and paint vaseline on rubber circle gasket, avoid the moisture in the foundation soil to ooze and influence model test research. Each coupling assembling is detachably installed respectively on each group's otic placode 30, utilizes otic placode 30 and coupling assembling fixed adjacent steel pipe, conveniently controls the height of model test device.
Preferably, the steel pipes include a first steel pipe 21, a third steel pipe 23 and a plurality of second steel pipes 22, the first steel pipe 21 can be fixed on the bottom plate 10 by welding, etc., the third steel pipe 23 is located at the top, each second steel pipe 22 is arranged between the first steel pipe 21 and the third steel pipe 23, each ear plate 30 is respectively arranged at the top of the side wall of the first steel pipe 21, the bottom of the side wall of the third steel pipe 23 and the top and the bottom of the side wall of each second steel pipe 22, and the height of the model testing device is further controlled by controlling the number of the second steel pipes 22. Further, since the first steel pipe 21 and the third steel pipe 23 are substantially the same in structure, installation only requires reverse arrangement, thereby saving production cost.
Specifically, the joints are between the first steel pipe 21 and the adjacent second steel pipe 22, between the adjacent second steel pipes 22, and between the second steel pipe 22 and the adjacent third steel pipe 23. The ear plate 30 is symmetrically provided with 4 on the first steel pipe 21 and the third steel pipe 23, and is symmetrically provided with 4 on the top and the bottom of each second steel pipe 22. The pre-buried pipe 50 can be preferably an acrylic pipe, and the pre-buried pipe 50 can form a discrete material pile at a reserved position, so that the outer diameter of the pre-buried pipe 50 is consistent with the diameter of the discrete material pile.
When the model test device for the discrete material pile composite foundation is used specifically, the first steel pipe 21 is fixed on the bottom plate 10, then the bottom plate 10 is moved to a proper position by using the bearing wheels, and the brake function of the bearing wheels is opened, so that the bottom plate 10 is fixed. Then, the fixing frame 40 is positioned at the upper opening position of the first steel pipe 21, and the embedded pipe 50 is inserted into the mounting hole until the lower end of the embedded pipe 50 contacts the base plate 10. Secondly, the foundation soil with the adjusted target water content is filled into the first steel pipe 21 for multiple times according to the amount, and each filling needs to be properly vibrated and compacted until the specified position, so that the compactness of the foundation soil is ensured. After the first steel pipe 21 is filled, the fixing frame 40 is removed, a rubber ring gasket coated with vaseline is placed on the first steel pipe 21, the second steel pipe 22 is spliced to the first steel pipe 21, and then the first steel pipe 21 and the second steel pipe 22 are fixed through the lug plates 30 through bolts. After the second steel pipes 22 are spliced and fixed, the mounting holes of the fixing frame 40 are slowly placed along the embedded pipes 50 and placed on the second steel pipes 22 until the second steel pipes are fixed, and then foundation soil is filled into the second steel pipes 22 according to the amount and for multiple times. After the second steel pipes 22 are filled, the fixing frame 40 is removed, the rubber ring gaskets are placed, and the plurality of second steel pipes 22 are alternately spliced until the preset height is reached after the third steel pipes 23 are spliced. Finally, the discrete materials are put into the embedded pipe 50 in a plurality of times according to the quantity, and the discrete materials put into each time need to be properly vibrated and compacted, so that the compaction degree of the discrete material pile is ensured. And after the discrete materials are filled to the designated height, removing the fixing frame 40, slowly pulling out the embedded pipe 50 to form a discrete material pile, finally covering a layer of waterproof film on the top of the model test device to prevent the water in the foundation soil from evaporating, standing for a period of time to enable the model test to be in a normal consolidation state, and then moving the model test to the designated position for test loading and data monitoring. After the loading of the model test is finished, the model test device can be moved to a proper position, and foundation soil and discrete material piles in the model box are removed one by detaching bolts. The model test device breaks the fixity of the conventional model test device and is beneficial to the flexible application of the model test device.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (9)
1. A model test device for a discrete material pile composite foundation is characterized by comprising:
a base plate;
the steel pipes are sequentially stacked upwards and enclose an accommodating cavity, and the adjacent steel pipes are detachably connected together;
the steel pipe embedded type heat exchanger is characterized by further comprising a fixing frame and a embedded pipe, wherein the fixing frame is installed outside the steel pipe, a mounting hole is formed in the middle of the fixing frame, the embedded pipe is installed on the mounting hole, the upper end of the embedded pipe extends out of the accommodating cavity, and the lower end of the embedded pipe extends to the bottom plate.
2. The model test device for discrete material pile composite foundation of claim 1, characterized in that: the fixing frame comprises a first transverse structure, a second transverse structure and a sleeve, the mounting hole is formed in the sleeve, the inner ends of the first transverse structure and the second transverse structure are fixed to the two sides of the sleeve respectively, mounting grooves are formed in the outer ends of the first transverse structure and the second transverse structure respectively and are embedded in the two sides of the steel pipe located at the top respectively.
3. The model test device for discrete material pile composite foundation according to claim 2, characterized in that: the central axis of each steel pipe, the central axis of the mounting hole and the central axis of the embedded pipe are all in the same vertical line.
4. The model test device for discrete material pile composite foundation of claim 1, characterized in that: still include a plurality of otic placodes and a plurality of coupling assembling, two the otic placode is constituteed a set ofly, every group the otic placode sets up respectively adjacently the concatenation department both sides of steel pipe, each coupling assembling detachably installs respectively in each group on the otic placode.
5. The model test device for discrete material pile composite foundation of claim 4, characterized in that: and adjacent splicing parts of the steel pipes are provided with sealing rings.
6. The model test device for discrete material pile composite foundation of claim 4, characterized in that: the connecting assembly is a bolt.
7. The model test device for discrete material pile composite foundation of claim 4, characterized in that: the steel pipes comprise a first steel pipe, a third steel pipe and a plurality of second steel pipes, the first steel pipe is fixed on the bottom plate, the third steel pipe is located at the top, the second steel pipes are arranged between the first steel pipe and the third steel pipe, and the ear plates are arranged at the top of the side wall of the first steel pipe, the bottom of the side wall of the third steel pipe and the top and the bottom of the side wall of the second steel pipe respectively.
8. The model test device for discrete material pile composite foundation of claim 7, characterized in that: the first steel pipe and the third steel pipe have the same structure.
9. The model test device for discrete material pile composite foundation of claim 1, characterized in that: the walking structure is arranged at the bottom of the bottom plate.
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| CN202020759405.4U CN212956653U (en) | 2020-05-08 | 2020-05-08 | Model test device for discrete material pile composite foundation |
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| CN202020759405.4U CN212956653U (en) | 2020-05-08 | 2020-05-08 | Model test device for discrete material pile composite foundation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235669A (en) * | 2021-04-14 | 2021-08-10 | 吉林建筑大学 | Assembled pre-buried half-pile remolded soil consolidation model box |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113235669A (en) * | 2021-04-14 | 2021-08-10 | 吉林建筑大学 | Assembled pre-buried half-pile remolded soil consolidation model box |
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