CN212129162U - Backing plate for controlling stress loss of prestressed anchor rod - Google Patents
Backing plate for controlling stress loss of prestressed anchor rod Download PDFInfo
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- CN212129162U CN212129162U CN202020527178.2U CN202020527178U CN212129162U CN 212129162 U CN212129162 U CN 212129162U CN 202020527178 U CN202020527178 U CN 202020527178U CN 212129162 U CN212129162 U CN 212129162U
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- connecting plate
- disc spring
- anchor rod
- spring group
- disc
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Abstract
The application relates to the technical field of anchor bolt support and discloses a backing plate for controlling stress loss of a prestressed anchor rod, which comprises a first connecting plate, a second connecting plate and a disc spring group, wherein the first connecting plate is fixedly connected with the side wall of a foundation pit, the second connecting plate is fixedly connected with the end part of the anchor rod, the second connecting plate is arranged with the end part of the anchor rod, the disc spring group is connected with the first connecting plate and the second connecting plate in a fixed mode. So set up, after the stock creep, the loss that the backing plate that is provided with belleville spring group can compensate prestressing force guarantees the stock and normally works. The problem of anchor rod prestressing force loss caused by creep displacement of the anchor rod is solved.
Description
Technical Field
The application relates to the technical field of anchor bolt support, more specifically to a backing plate for controlling stress loss of a prestressed anchor rod.
Background
At present, with the rapid development of urban construction, urban space is in daily shortage. Therefore, people expand to deeper underground space. In order to protect the safety of surrounding buildings and pipelines, the foundation pit support is generally a pile-anchor support, and the support form has better expansion and deformation and can meet the requirement of slope stability.
However, due to the characteristics of the anchor rod and the ground layer, the anchor rod is easy to creep and displace along with the passage of time, so that the prestress loss of the anchor rod is caused, the slope is caused to displace greatly, and the stability of the slope and the safety of adjacent pipelines and buildings are seriously influenced.
Therefore, how to solve the problem of anchor rod prestress loss caused by creep displacement of the anchor rod is a key technical problem to be solved by the technical personnel in the field.
SUMMERY OF THE UTILITY MODEL
To overcome at least some of the problems of the related art, the present application provides a tie plate for controlling the stress loss of a prestressed anchor, which can solve the problem of the stress loss of the anchor caused by the creep displacement of the anchor.
The application provides a backing plate for controlling prestressed anchor rod stress loss, including be used for with foundation ditch lateral wall fixed connection's first connecting plate, be used for with the tip fixed connection's of stock second connecting plate and setting be in first connecting plate with belleville spring group between the second connecting plate, belleville spring group with first connecting plate with second connecting plate fixed connection.
Preferably, the disc spring group comprises a plurality of disc springs, and the disc springs are overlapped.
Preferably, the disc spring group comprises a plurality of disc springs, and the disc springs are oppositely matched.
Preferably, the disc spring group comprises a plurality of disc springs which are combined and combined.
Preferably, the disc spring is a trapezoidal section disc spring.
Preferably, the ratio of the height of the disc spring to the thickness of the disc spring is 1.4.
Preferably, the first connecting plate and the second connecting plate are welded with the disc spring group.
Preferably, the first and second connecting plates are identical in shape and size.
Preferably, the first connecting plate and the second connecting plate are made of stainless steel or inconel.
Preferably, the material of the disc spring group is spring steel.
The technical scheme provided by the application can comprise the following beneficial effects:
the application provides a backing plate for controlling prestressed anchorage pole stress loss, including first connecting plate, the second connecting plate and the belleville spring group of setting between first connecting plate and second connecting plate, belleville spring group and first connecting plate and second connecting plate fixed connection, first connecting plate be used for with foundation ditch lateral wall fixed connection, the second connecting plate be used for with the tip fixed connection of stock, because belleville spring is one kind can warp, but the unchangeable structure of stress, the characteristic that rigidity is big has, the buffering is inhaled the shock-absorbing capacity and is strong, can bear big load with little deformation, the variable stiffness characteristic has. After the anchor rod creeps, the base plate provided with the disc spring group can compensate the loss of prestress, and the normal work of the anchor rod is ensured. The problem of anchor rod prestressing force loss caused by creep displacement of the anchor rod is solved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic illustration of a tie plate to anchor connection for controlling stress loss of a pre-stressed anchor according to some exemplary embodiments;
FIG. 2 is a side view of a shim plate for controlling stress loss of a prestressed anchor according to some exemplary embodiments;
FIG. 3 is a schematic diagram illustrating a belleville spring stack according to some exemplary embodiments;
FIG. 4 is a schematic diagram illustrating a belleville spring apposition according to some exemplary embodiments;
FIG. 5 is a composite schematic diagram of a belleville spring shown in accordance with some exemplary embodiments.
In the figure:
1. a first connecting plate; 2. a second connecting plate; 3. a disc spring set; 4. the end of the anchor rod.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus or methods consistent with aspects of the present application.
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of 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.
Hereinafter, embodiments will be described with reference to the drawings. The embodiments described below do not limit the scope of the invention described in the claims. Further, the entire contents of the configurations shown in the following embodiments are not limited to those necessary as a solution of the invention described in the claims.
Referring to fig. 1 to 5, the present embodiment provides a backing plate for controlling stress loss of a prestressed anchor rod, including a first connecting plate 1, a second connecting plate 2 and a belleville spring set 3 disposed between the first connecting plate 1 and the second connecting plate 2, the belleville spring set 3 is fixedly connected to the first connecting plate 1 and the second connecting plate 2, the first connecting plate 1 is used for being fixedly connected to a side wall of a foundation pit, the second connecting plate 2 is used for being fixedly connected to an end portion 4 of the anchor rod, that is, when the anchor rod is installed, the first connecting plate 1 and the second connecting plate 2 are respectively connected to the side wall of the foundation pit and the anchor rod, so as to install the anchor rod on the side wall of the foundation pit.
The disk spring is a structure which can deform but has no stress, has the characteristic of high rigidity, has strong buffering and vibration absorbing capacity, can bear large load with small deformation, and is suitable for occasions with small requirements on axial space; the characteristic curve can be linear, gradual increase, gradual decrease or the combination thereof; has a wide range of non-linear characteristics.
The disc spring is a special spring which is conical in the axial direction and bears load, after the disc spring bears load deformation, certain potential energy is stored, the stress distribution of the disc spring is uniformly decreased from inside to outside, and the effect of low stroke and high compensation force can be realized. The load is big, and the stroke is short, and required space is little, and combination convenient to use, the maintenance is changed the dress easily, and economic security is high, and it is little to be applicable to the space.
So set up, after the stock creep, the loss that the backing plate that is provided with belleville spring group 3 can compensate prestressing force guarantees the stock and normally works. The problem of anchor rod prestressing force loss caused by creep displacement of the anchor rod is solved.
In this embodiment, the disc spring group 3 includes a plurality of disc springs, and the plurality of disc springs may be stacked and combined, as shown in fig. 3, the stacked combination refers to that all the disc springs are arranged in parallel, and the plurality of single disc springs are stacked and used in the same direction. When the folding combination is adopted, the disc spring piece has larger damping due to the friction between the disc spring pieces, and the impact energy is dissipated. The deformation of the disc spring group subjected to force by adopting the superposition combination is the same as that of the single disc spring, but the force is N times of the force of the single disc spring (wherein N refers to the number of the disc springs included in the disc spring group), for example, the disc spring group is formed by superposing 5 single disc springs, the deformation of the disc spring group subjected to force is the same as that of the single disc spring, if the deformation of the single disc spring is 5mm, the deformation of the disc spring group is 5mm, and the force is 5 times of that of the single disc spring.
The multiple disc springs may be combined, as shown in fig. 4, the combination means that all the disc springs are arranged oppositely, and the multiple single disc springs are alternately combined in different directions. The deformation of the disk spring group adopting the involution combination after being stressed is N times of the deformation of the single disk spring (wherein, N refers to the number of the disk springs included in the disk spring group), but the stressed force is the same as that of the single disk spring. For example, a disc spring group is formed by combining 4 single disc springs, the deformation of the disc spring group after being stressed is 4 times of that of the single disc springs, and if the deformation of the single disc springs is 5mm, the deformation of the disc spring group is 20mm, and the stressed force is the same as that of the single disc springs.
The plurality of disc springs may be combined, and as shown in fig. 5, the combined combination refers to a combination of a superimposed combination and an involuted combination. The deformation of the disk spring group in the composite combination after being stressed is the same as that of the disk spring group in the involutory combination after being stressed, and the stressed force is the same as that of the disk spring group in the superposed combination. For example, the disc spring group comprises 3 single disc springs, 2 single disc springs are oppositely combined, and the other single disc spring is superposed on one single disc spring, so that the deformation of the disc spring group after being stressed is 2 times that of the single disc spring, for example, the deformation of the single disc spring is 5mm, the deformation of the disc spring group is 10mm, and the stress is 2 times that of the single disc spring.
In this way, the combined use of belleville springs allows additional load flexibility. The deformation of the disc spring group 3 is the same as that of a single disc spring, and the load at a given deformation amount is N times that of a single spring (N is the number of single disc spring pieces in the disc spring group 3). In the case of the involution combination, the deformation of the disc spring group 3 is the sum of the deformation amounts of the single disc springs in the disc spring group 3, and the load is the same as that of the single disc springs. The increasing load characteristic curve can be obtained by combining the superposed combined springs composed of different disc spring groups 3 or the single disc spring groups 3 with different thicknesses into the disc spring group 3, in which case, after the disc spring group 3 reaches the flattening position or the limit stroke, the deformation of the disc spring group 3 is no longer influenced by the single disc spring or the combined disc spring.
Wherein, the disk spring can be a disk spring with a trapezoidal section.
Preferably, in order to ensure that the stress of the anchor rod is approximately constant when the anchor rod is subjected to creep displacement, the ratio of the height of the disc spring to the thickness of the disc spring can be set to be about 1.4, so that the stress loss of the anchor rod can be compensated.
In this embodiment, the first connecting plate 1 and the second connecting plate 2 are welded to the disc spring group 3 to improve the stability and strength of the cushion plate. When in use, the first connecting plate 1 can also be welded with a fixing piece on the side wall of the foundation pit, and the second connecting plate 2 and the end part 4 of the anchor rod can also be welded.
Moreover, as shown in fig. 2, the first connecting plate 1 and the second connecting plate 2 have the same shape, size and material, the first connecting plate 1 and the second connecting plate 2 can be made of stainless steel or inconel, and can be determined according to actual needs, and paint is sprayed on the outer surfaces of the first connecting plate 1 and the second connecting plate 2 to prevent the first connecting plate from being corroded or corroded. The material of the disc spring group 3 can be spring steel, and can be specifically made of cold-rolled or hot-rolled high-quality steel strips or steel plates, when the disc spring with the thickness of more than 6 mm can be forged blanks, and the steel mainly comprises medium-carbon low-alloy spring steel (silicon-manganese or chromium-vanadium spring steel) and high-quality carbon spring steel.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (10)
1. The base plate for controlling the stress loss of the prestressed anchor rod is characterized by comprising a first connecting plate (1) fixedly connected with the side wall of a foundation pit, a second connecting plate (2) fixedly connected with the end part (4) of the anchor rod and a disc spring group (3) arranged between the first connecting plate (1) and the second connecting plate (2), wherein the disc spring group (3) is fixedly connected with the first connecting plate (1) and the second connecting plate (2).
2. The tie plate for controlling stress loss of a prestressed anchor according to claim 1, wherein said disc spring group (3) comprises a plurality of disc springs, and a plurality of said disc springs are stacked.
3. The tie plate for controlling stress loss of a prestressed anchor according to claim 1, wherein said disc spring group (3) comprises a plurality of disc springs, and a plurality of said disc springs are coupled.
4. The tie plate for controlling stress loss of a prestressed anchor according to claim 1, wherein said disc spring group (3) comprises a plurality of disc springs, and a plurality of said disc springs are combined.
5. The pad plate for controlling stress loss of a prestressed anchor according to claim 2, 3 or 4, wherein said disc spring is a trapezoidal section disc spring.
6. The pad for controlling stress loss of a prestressed anchor according to claim 5, wherein the ratio of the height of said disc spring to the thickness of said disc spring is 1.4.
7. The tie plate for controlling the stress loss of a prestressed anchor according to claim 1, wherein the first connecting plate (1) and the second connecting plate (2) are welded to the disc spring group (3).
8. The tie plate for controlling stress loss of a prestressed anchor according to claim 1, wherein the first connecting plate (1) and the second connecting plate (2) are identical in shape and size.
9. The tie plate for controlling the stress loss of a prestressed anchor according to claim 1, wherein the first connecting plate (1) and the second connecting plate (2) are made of stainless steel or inconel.
10. The tie plate for controlling the stress loss of a prestressed anchor according to claim 1, wherein the belleville spring stack (3) is made of spring steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020527178.2U CN212129162U (en) | 2020-04-10 | 2020-04-10 | Backing plate for controlling stress loss of prestressed anchor rod |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020527178.2U CN212129162U (en) | 2020-04-10 | 2020-04-10 | Backing plate for controlling stress loss of prestressed anchor rod |
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| CN212129162U true CN212129162U (en) | 2020-12-11 |
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| CN202020527178.2U Active CN212129162U (en) | 2020-04-10 | 2020-04-10 | Backing plate for controlling stress loss of prestressed anchor rod |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942390A (en) * | 2021-02-07 | 2021-06-11 | 四川华佑天成科技有限公司 | Design method of damping and energy dissipating component for anchor rod frame beam |
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2020
- 2020-04-10 CN CN202020527178.2U patent/CN212129162U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112942390A (en) * | 2021-02-07 | 2021-06-11 | 四川华佑天成科技有限公司 | Design method of damping and energy dissipating component for anchor rod frame beam |
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