CN211773959U - Model pile testing device and testing system thereof - Google Patents
Model pile testing device and testing system thereof Download PDFInfo
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- CN211773959U CN211773959U CN202020173731.7U CN202020173731U CN211773959U CN 211773959 U CN211773959 U CN 211773959U CN 202020173731 U CN202020173731 U CN 202020173731U CN 211773959 U CN211773959 U CN 211773959U
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Abstract
A model pile testing device and a testing system thereof relate to the technical field of model tests. This model pile test device includes the loading case, the reaction frame, vertical loading mechanism, horizontal loading mechanism and measuring component, the model pile that awaits measuring buries in the center of loading case underground, vertical loading mechanism connects on the reaction frame, and act on the top of the model pile that awaits measuring, be used for applying vertical load to the model pile that awaits measuring, horizontal loading mechanism sliding connection is on the reaction frame, and act on the perisporium of the model pile that awaits measuring, be used for applying horizontal load to the model pile that awaits measuring, measuring component is used for measuring the displacement change at the center of the model pile that awaits measuring relative loading case. The model pile testing system comprises the model pile testing device. The model pile testing device can adjust the size of horizontal load or vertical load according to test requirements so as to research the bearing characteristic of a pile foundation under the action of bidirectional load.
Description
Technical Field
The utility model relates to a model test technical field particularly, relates to a model pile test device and test system thereof.
Background
With the construction of high-rise buildings, bridges, towers and other buildings, the combined load from the upper part of the single pile is increasingly important in engineering practice. The combined load is the combined load of the vertical load and the horizontal load of the pile body part acting above the ground. Under combined load, additional bending moment is generated due to the occurrence of bending deformation of the pile body, so that the horizontal bearing capacity of the pile is influenced, and horizontal load causes horizontal deformation of the pile body, so that the resistance of soil around the pile is changed, and the vertical bearing characteristic of the pile is influenced.
Due to the mutual influence among the load components, the bearing characteristics of the pile foundation are more complicated than those of a unidirectional load pile. In the prior art, an indoor model test is generally adopted to research the working principle and the working phenomenon of different pile foundations. However, the existing indoor model test research mainly focuses on a single vertical or horizontal single load loading device, so that the research on a model pile test device capable of loading in two directions has an important significance for researching the bearing and deformation characteristics of a pile foundation subjected to two directions.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a model pile test device and test system thereof, it can be according to the size of experimental horizontal load or vertical load of requiring adjustment to research pile foundation bears the weight of characteristic under the effect of two-way load.
The embodiment of the utility model is realized like this:
an aspect of the utility model provides a model pile testing device, this model pile testing device include loading case, reaction frame, vertical loading mechanism, horizontal loading mechanism and measuring component, await measuring the model pile bury underground in the center of loading case, vertical loading mechanism connect in on the reaction frame, and act on the top of the model pile that awaits measuring, it is right to be used for the vertical load is applyed to the model pile that awaits measuring, horizontal loading mechanism sliding connection in on the reaction frame, and act on the perisporium of the model pile that awaits measuring, it is right to be used for the model pile that awaits measuring applys horizontal load, measuring component is used for measuring the model pile that awaits measuring is relative the displacement at the center of loading case changes. The model pile testing device can adjust the size of horizontal load or vertical load according to test requirements so as to research the bearing characteristic of a pile foundation under the action of bidirectional load.
Optionally, the reaction frame includes a main body and a cross beam connected to the main body, the horizontal loading mechanism is slidably connected to the main body, and the vertical loading mechanism is connected to the cross beam.
Optionally, the vertical loading mechanism is a first hydraulic jack.
Optionally, a first force sensor is mounted on the first hydraulic jack.
Optionally, the horizontal loading mechanism is a second hydraulic jack.
Optionally, a second force sensor is mounted on the second hydraulic jack.
Optionally, the measurement component includes a plurality of displacement meters, and the plurality of displacement meters are respectively used for measuring displacement changes of the model pile to be measured at different positions.
Optionally, the measuring assembly further includes a fixing frame, the fixing frame is connected to the loading box, and the plurality of displacement meters are uniformly distributed on the fixing frame.
Optionally, sandy soil with the same soil quality as that of the pile foundation construction site is filled between the loading box and the model pile to be tested.
The utility model discloses an on the other hand provides a model pile test system, and this model pile test system includes foretell model pile test device. The model pile test system can adjust the size of horizontal load or vertical load according to test requirements so as to research the bearing characteristic of a pile foundation under the action of bidirectional load.
The beneficial effects of the utility model include:
the model pile test device that this embodiment provided can be through vertical loading mechanism and/or horizontal loading mechanism to carry out level or vertical load alone to the model pile that awaits measuring, thereby research the bearing characteristic of model pile that awaits measuring under the effect of one-way load, also can apply level and vertical load to the model pile that awaits measuring simultaneously, and carry out the regulation that corresponds the load size according to experimental requirement, thereby research the bearing characteristic of model pile that awaits measuring under the effect of two-way load. In addition, because the position that horizontal loading mechanism applyed horizontal load to the model pile that awaits measuring is adjustable, consequently this application still can applys the moment of flexure of equidimension different grade type to the model pile that awaits measuring. The model pile testing device obtains the bearing characteristic of the model pile to be tested through testing the model pile under various load effects, and further provides powerful data reference for researching the bearing and deformation characteristics of the pile foundation.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural diagram of a model pile testing apparatus provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a loading box and a measuring assembly provided by an embodiment of the present invention.
Icon: 10-a loading box; 20-reaction frame; 21-a body; 22-a cross beam; 30-a vertical loading mechanism; 40-a horizontal loading mechanism; 50-a measurement assembly; 51-a displacement meter; 52-a fixed frame; 60-model pile to be measured.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the treatment of civil engineering foundation, the problems of insufficient bearing capacity and stability, compression, uneven settlement, liquefaction and the like of the foundation are often faced. For example, in the construction of buildings (structures) such as high-rise buildings, bridges, towers and the like, the combined load borne by the pile foundation has a great influence on the bearing performance of the pile foundation, so that the research on the bearing performance of the pile foundation is necessary to determine the working characteristics under the action of the oblique load of the pile foundation, and the method has important significance for the research on the overall safety of the buildings.
The prototype test of the column foundation needs to spend a large amount of manpower, material resources and time or the limit of other factors is difficult to realize, the field test site conditions and the like are complicated and changeable, the uncontrollable factors are too many, the randomness of the test result is often large, and the change of the related rule is not obvious. Therefore, the indoor model test of the pile foundation is carried out. The indoor model pile test is to scale the in-situ foundation and pile in a certain proportion, accurately and artificially set various factors of a test field, controllably study the influence of various variable factors on the reinforcing effect, and mechanically interpret the reinforcing effect.
Referring to fig. 1 and fig. 2, the present embodiment provides a model pile testing apparatus, which can implement a test of a tensile load and a compressive load of an indoor model pile in various forms such as an inclined horizontal mode and a vertical mode. The device comprises a loading box 10, a reaction frame 20, a vertical loading mechanism 30, a horizontal loading mechanism 40 and a measuring assembly 50, a model pile 60 to be measured is buried in the center of the loading box 10, the vertical loading mechanism 30 is connected to the reaction frame 20 and acts on the top of the model pile 60 to be measured, the vertical loading mechanism is used for applying vertical load to the model pile 60 to be measured, the horizontal loading mechanism 40 is connected to the reaction frame 20 in a sliding mode and acts on the peripheral wall of the model pile 60 to be measured, the horizontal load is applied to the model pile 60 to be measured, and the measuring assembly 50 is used for measuring displacement change of the model pile 60 to be measured relative to the center of the loading box 10.
In this embodiment, the loading box 10 is a model frame welded by angle steel, and is reinforced by steel bars, and the shell of the loading box 10 is made of wood plates.
The positioning of the model pile 60 to be tested is a very important step in the process of embedding the model pile 60 to be tested. In order to facilitate the positioning of the model box to be tested, in the present embodiment, the model pile 60 to be tested is embedded in the center of the loading box 10. Specifically, the center position of the loading box 10 and the center line of the model pile 60 to be tested are determined before the model pile 60 to be tested is embedded. In order to ensure the accurate positioning of the model pile 60 to be tested, the center line of the loading box 10 and the center line of the model pile should be matched during the embedding process of the model pile 60 to be tested.
In the process of burying, earth can be filled in layers according to the experimental requirement, when the earth is filled to the bottom elevation of the model pile 60 to be tested, the model pile is temporarily fixed, then the earth is continuously filled to the elevation, and whether the measuring assembly 50 is buried or not is selected according to the experimental requirement.
It should be noted that, in the present embodiment, the measuring assembly 50 includes a plurality of displacement meters 51, and the plurality of displacement meters 51 are respectively used for measuring displacement changes of the model pile 60 to be tested at different positions during the testing process. In the present embodiment, the displacement meter 51 is a digital display type displacement meter 51.
Further, in the present embodiment, the measuring assembly 50 further includes a fixing frame 52, the fixing frame 52 is connected to the loading box 10, and the plurality of displacement meters 51 are uniformly distributed on the fixing frame 52. Thus, the bearing performance under various combined loads borne by the model pile 60 to be tested is determined by measuring the displacement change of the model pile 60 to be tested relative to the loading box 10. Of course, in other embodiments, the measuring assembly 50 may alternatively be embedded in the fill between the loading box 10 and the model pile 60 to be tested. The present invention is not limited thereto, as long as the bearing performance of the model pile 60 under test under various combined loads can be detected.
Secondly, soil filled in the middle of the loading box 10 can simulate the characteristics of corresponding soil according to engineering conditions. That is, the soil filled between the loading box 10 and the model pile 60 to be tested is selected as sand soil as much as possible, which is the same as the soil quality of the pile foundation construction site. Therefore, in the whole test process, the simulation environment is closer to the actual construction site environment, the test effect is more accurate, and the method has higher research value.
In addition, when soil is filled in the loading box 10, careful and careful operation is required, so that the influence of the soil filling on the positioning of the model pile 60 to be tested is reduced as much as possible. In addition, necessary measures should be taken to ensure the perpendicularity and positioning of the model pile 60 to be tested. For example, a weight-hanging method may be used in the test.
In the present embodiment, the reaction frame 20 includes a main body 21 and a cross beam 22 connected to the main body 21, wherein the horizontal loading mechanism 40 is slidably connected to the main body 21, so that the horizontal loading mechanism 40 can slide up and down along the main body 21 (the up and down directions are based on the directions shown in the figure), and further the horizontal loading mechanism 40 can selectively apply horizontal loads to different positions of the model pile 60 to be tested. The vertical loading mechanism 30 is connected to the cross beam 22, so that the vertical loading mechanism 30 can act on the top of the model pile 60 to be tested, and further apply a vertical load to the model pile 60 to be tested.
In the present embodiment, the main body 21 is perpendicular to the ground, the cross beam 22 is perpendicular to the main body 21, the main body 21 and the cross beam 22 together form an L-shaped structure, and the cross beam 22 is located above the loading box 10. Thus, the reaction frame 20 occupies a small area, thereby improving the compactness of the entire apparatus. In addition, the end of the main body 21 away from the cross beam 22 may be fixed on the ground or connected to the loading box 10, and specifically, what kind of arrangement is adopted can be selected by those skilled in the art according to actual needs.
In this embodiment, the vertical loading mechanism 30 is a first hydraulic jack, and a first force sensor is further mounted on the first hydraulic jack. And the first hydraulic jack is provided with a loading handle and an output force value measuring meter.
The horizontal loading mechanism 40 is a second hydraulic jack, and a second force sensor is further mounted on the second hydraulic jack. And the second hydraulic jack is also provided with a loading handle and an output force value measuring meter.
In summary, the model pile testing apparatus provided in this embodiment includes the loading box 10, the reaction frame 20, the vertical loading mechanism 30, the horizontal loading mechanism 40, and the measuring component 50, the model pile 60 to be measured is buried in the center of the loading box 10, the vertical loading mechanism 30 is connected to the reaction frame 20, and acts on the top of the model pile 60 to be measured, so as to apply a vertical load to the model pile 60 to be measured, the horizontal loading mechanism 40 is slidably connected to the reaction frame 20, and acts on the peripheral wall of the model pile 60 to be measured, so as to apply a horizontal load to the model pile 60 to be measured, and the measuring component 50 is used for measuring the displacement change of the model pile 60 to be measured relative to the center of the loading box 10. This model pile test device can be through vertical loading mechanism 30 and/or horizontal loading mechanism 40 to carry out level or vertical load alone to the model pile 60 that awaits measuring, thereby research the bearing characteristic of model pile 60 that awaits measuring under the effect of one-way load, also can exert level and vertical load to the model pile 60 that awaits measuring simultaneously, and carry out the regulation that corresponds the load size according to experimental requirement, thereby research the bearing characteristic of model pile 60 that awaits measuring under the effect of two-way load.
In addition, because the position of the horizontal loading mechanism 40 applying the horizontal load to the model pile 60 to be tested is adjustable, the bending moments with the same size and different types can be applied to the model pile 60 to be tested. The model pile testing device obtains the bearing characteristic of the model pile 60 to be tested through testing under various load effects on the model pile, and further provides powerful data reference for researching the bearing and deformation characteristics of a pile foundation.
The above description is only an alternative embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a model pile test device, its characterized in that, includes loading case, reaction frame, vertical loading mechanism, horizontal loading mechanism and measuring component, the model pile that awaits measuring bury underground in the center of loading case, vertical loading mechanism connect in on the reaction frame, and act on the top of the model pile that awaits measuring, be used for right the model pile that awaits measuring applys vertical load, horizontal loading mechanism sliding connection in on the reaction frame, and act on the perisporium of the model pile that awaits measuring, be used for right the model pile that awaits measuring applys horizontal load, measuring component is used for measuring the model pile that awaits measuring is relative the displacement change at the center of loading case.
2. The model pile test device according to claim 1, wherein the reaction frame comprises a main body and a cross beam connected with the main body, the horizontal loading mechanism is connected to the main body in a sliding manner, and the vertical loading mechanism is connected to the cross beam.
3. A model pile test rig according to claim 1, characterised in that the vertical loading mechanism is a first hydraulic jack.
4. A model pile test rig according to claim 3, wherein a first force sensor is mounted on the first hydraulic jack.
5. A model pile test rig according to claim 1 or 3, wherein the horizontal loading mechanism is a second hydraulic jack.
6. A model pile test rig according to claim 5, characterised in that a second force sensor is mounted on the second hydraulic jack.
7. The model pile test device according to claim 1, wherein the measuring component comprises a plurality of displacement meters, and the plurality of displacement meters are respectively used for measuring displacement changes of the model pile to be tested at different positions.
8. The model pile testing device according to claim 7, wherein the measuring assembly further comprises a fixing frame, the fixing frame is connected to the loading box, and the plurality of displacement meters are uniformly distributed on the fixing frame.
9. The model pile testing device according to claim 1, wherein sandy soil with the same soil quality as that of a pile foundation construction site is filled between the loading box and the model pile to be tested.
10. A model pile test system, comprising a model pile test apparatus according to any one of claims 1 to 9.
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| CN202020173731.7U CN211773959U (en) | 2020-02-14 | 2020-02-14 | Model pile testing device and testing system thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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