CN210766440U - Stress low-loss anchor structure - Google Patents
Stress low-loss anchor structure Download PDFInfo
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- CN210766440U CN210766440U CN201921362964.5U CN201921362964U CN210766440U CN 210766440 U CN210766440 U CN 210766440U CN 201921362964 U CN201921362964 U CN 201921362964U CN 210766440 U CN210766440 U CN 210766440U
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- backing plate
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Abstract
The utility model discloses a low loss ground tackle structure of stress, including the adjustable backing plate that is used for cooperating the anchor slab and cooperation and anchor slab of locking steel strand wires to be connected, adjustable backing plate opens the through-hole that supplies many steel strand wires for the anchor to pass, and steel strand wires pass anchor slab and through-hole, adjustable backing plate passes through the screw thread and rotates the connection in anchor slab one side, closes length in order to adjust the stretch-draw locking force to steel strand wires soon through the screw thread of adjusting adjustable backing plate and anchor slab. The utility model provides a stress low-loss anchor structure for prestressed steel strand of road bridge or railway bridge.
Description
Technical Field
The utility model relates to an anchorage device for public road bridge roof beam or railway bridge roof beam specifically indicates an anchorage device structure of stress low loss
Background
The prestressed concrete assembled hollow slab bridge is a main bridge type of highway or railway bridges in China, and is widely applied to medium and small-span highway bridges. With the influence of a plurality of adverse factors such as rapid increase of traffic volume, vehicle overrun and the like, the existing hollow slab bridge needs to be reinforced during installation or maintenance. The existing common reinforcement mode is external prestress reinforcement, the bearing capacity of the bridge is improved by tensioning external prestress tendons in a tension area of the bridge, the basic principle is that the compressive property of concrete is fully utilized, the external prestress tendons apply prestress on a beam body, and the internal force generated by partial external load is offset by the bending moment generated by the prestress, so that the purposes of improving the structural use performance and improving the ultimate bearing capacity are achieved.
Whether external prestress reinforcement can achieve an expected reinforcement effect or not is closely related to anchoring of external prestress, and for a prestressed concrete assembled hollow slab bridge, the existing anchoring structure and process of external prestress reinforcement is to install prestressed tendons such as steel strands and the like in outer side wall concrete of two side plates at two sides of the hollow slab bridge, then install a prestressed anchorage at one side, and then install an anchorage at the other side, stretch the external prestressed tendons and the like.
In the existing working condition, a steel strand stress beam is penetrated after a hollow pipeline is pre-embedded in a bent cap above a pier, then anchor backing plates (bearing plates) at two ends and a prestressed anchor are installed, then an external prestressed beam is tensioned, and then locking is carried out. The anchor backing plate below the prestressed anchorage device is usually made of iron castings and is vertically and symmetrically arranged at two ends, namely two ends, along the plate girder or the bent cap.
Although installation and construction of current anchor system are all comparatively swift, nevertheless in the erection construction, all need install the limiting plate on its each ground tackle when engineering ground tackle stretch-draw, locking, consuming time power: when the prestressed steel strand is tensioned, an auxiliary tool, namely a limiting plate, is required to be arranged on the engineering anchorage device, and an auxiliary tool, namely the limiting plate, is arranged between the anchorage device and the jack. Therefore, it is also necessary to select and install the position-limiting plate with time and labor.
Disclosure of Invention
An object of the utility model is to provide a stress low-loss's ground tackle structure that road bridge roof beam or railway bridge roof beam prestressing force steel strand wires were used.
In order to achieve the above object, the utility model discloses a low loss ground tackle structure of stress, including the anchor slab that is used for cooperation locking steel strand wires and the adjustable backing plate that cooperation and anchor slab are connected, adjustable backing plate opens the through-hole that supplies many steel strand wires for the anchor to pass, and steel strand wires pass anchor slab and through-hole, adjustable backing plate passes through the screw thread and rotates the connection in anchor slab one side, closes length in order to adjust the stretch-draw locking force to steel strand wires through the screw thread of adjusting adjustable backing plate and anchor slab soon.
Furthermore, the adjustable backing plate and the anchor plate are coaxially arranged.
Furthermore, the through holes arranged on the adjustable backing plate can accommodate the rotation of each steel strand arranged on the anchor plate;
and the through hole and the anchor plate are coaxially arranged.
Furthermore, the adjustable base plate is a circular body, the adjustable base plate is provided with a jack in a circular outer ring, and the jack is inserted into the detachable stressing rod so as to conveniently rotate the adjustable base plate.
Furthermore, the adjustable backing plate is a circular body, the adjustable backing plate is provided with threads on a circular outer ring, and the threads are convenient to rotate the adjustable backing plate.
The utility model has the advantages that:
firstly, the anchorage device of the utility model realizes the compensation of the stress loss when the steel strand is tensioned and locked by adjusting the distance between the adjustable backing plate and the anchor plate, thereby reducing the stress loss to the minimum;
and secondly, the adjustable base plate is connected with the anchor plate through threads, so that the adjustable base plate can be produced and sold in a matched mode, and the base plate does not need to be additionally selected to be matched with the anchor plate.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a schematic view showing the structure of an adjustable mat according to embodiment 1;
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a cross-sectional view taken along line B-B of FIG. 2;
wherein, the base plate 1 can be adjusted; a jack 101; a through-hole 102; a detachable stress application rod 13; an anchor plate 2.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1-4, the low-stress-loss anchor structure of the present embodiment includes an anchor plate 2 and an adjustable pad 1 disposed on one side of the anchor plate 2, wherein the adjustable pad 1 is rotatably connected to one side of the anchor plate 2 by a thread; but it has a through-hole 102 that supplies anchor to pass with steel strand wires 11 to open on adjustable backing plate 1, but adjustable backing plate opens the through-hole 102 that supplies many anchor to pass with steel strand wires, and steel strand wires pass anchor slab and through-hole 102, but adjustable backing plate 1 rotates the one side of connecting at anchor slab 2 through the screw thread, closes length soon with the stretch-draw locking force of regulation to steel strand wires through the screw thread of adjusting adjustable backing plate 1 and anchor slab 2.
The adjustable base plate 1 and the anchor plate 2 are coaxially arranged, and acting force is more uniform and stable during steel strand tensioning.
The through hole 102 arranged on the adjustable base plate 1 can accommodate a plurality of steel strands arranged on the anchor plate 2 to rotate in a circular motion along the axis of the through hole.
The adjustable backing plate 1 is a circular body, the adjustable backing plate 1 is provided with a jack 101 on a circular outer ring, and the jack 101 is inserted into the detachable stressing rod 13 so as to conveniently rotate the adjustable backing plate 1.
In the prior art, the backing plate is fixedly mounted on the anchor plate 2 for abutting against the anchor plate, and in addition, has no other function. The utility model provides an adjustable backing plate 1 utilizes adjustable backing plate 1 and anchor slab 2 to pass through threaded connection, rotates the whole length after being connected of adjustable backing plate 1 and anchor slab 2 of adjustment through the screw thread, and the tension force of adjustment ground tackle to steel strand wires can realize drawing or putting a little to steel strand wires 11 through rotating adjustable backing plate to the adjustment of adjustment to steel strand wires prestressing force.
The utility model has simple structure, and realizes effective compensation of the stress loss caused by the tension locking of the steel strand through the structural design of the adjustable backing plate; the steel strand prestress loss caused by repeated loading of the anchorage device can be effectively prevented when the engineering anchorage device is used; can ensure the long-term effective anchoring stability of the anchorage device.
As an alternative scheme, the adjustable base plate is a circular body, the adjustable base plate is provided with the tooth patterns on the circular outer ring, and the tooth patterns facilitate the rotation of the adjustable base plate.
The above-mentioned embodiments are only for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present patent and to implement the same, so the scope of the present patent should not be limited by the embodiments, i.e. all equivalent changes and modifications made according to the spirit of the present patent disclosure still fall within the scope of the present patent.
Claims (5)
1. A stress low-loss anchor structure, comprising: including the anchor slab that is used for cooperating locking steel strand wires and the adjustable backing plate that cooperation and anchor slab are connected, adjustable backing plate opens the through-hole that supplies many steel strand wires for the anchor to pass, and the steel strand wires pass anchor slab and through-hole, adjustable backing plate passes through screw thread swivelling joint in anchor slab one side, closes length in order to adjust the stretch-draw locking force to the steel strand wires through the screw thread of adjusting adjustable backing plate and anchor slab soon.
2. The stress-low-loss anchor structure of claim 1, wherein: the adjustable base plate and the anchor plate are coaxially arranged.
3. A stress low loss anchor construction according to claim 1 or claim 2, wherein: the through hole arranged on the adjustable backing plate can accommodate each steel strand arranged on the anchor plate to rotate;
and the through hole and the anchor plate are coaxially arranged.
4. The stress-low-loss anchor structure of claim 3, wherein: the adjustable base plate is a circular body, the adjustable base plate is provided with a jack on a circular outer ring, and the jack is inserted into a detachable stressing rod so as to conveniently rotate the adjustable base plate.
5. The stress-low-loss anchor structure of claim 3, wherein: the adjustable backing plate is a circular body, the adjustable backing plate is provided with the thread on the circular outer ring, and the thread is convenient to rotate the adjustable backing plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921362964.5U CN210766440U (en) | 2019-08-21 | 2019-08-21 | Stress low-loss anchor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921362964.5U CN210766440U (en) | 2019-08-21 | 2019-08-21 | Stress low-loss anchor structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210766440U true CN210766440U (en) | 2020-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921362964.5U Active CN210766440U (en) | 2019-08-21 | 2019-08-21 | Stress low-loss anchor structure |
Country Status (1)
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| CN (1) | CN210766440U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021032176A1 (en) * | 2019-08-21 | 2021-02-25 | 杭州钜力锚杆科技有限公司 | Self-locking anchorage device with low stress loss and low retraction |
-
2019
- 2019-08-21 CN CN201921362964.5U patent/CN210766440U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021032176A1 (en) * | 2019-08-21 | 2021-02-25 | 杭州钜力锚杆科技有限公司 | Self-locking anchorage device with low stress loss and low retraction |
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