Bridge prestressed anchorage device
Through the combined structure of bellows, fixing seats, anchor plates and clamps, the tightening of the pulling screws and nuts, combined with the spiral ribs, the problem of loosening of the steel strands is solved, and the firm fixation and prestress transmission of the steel strands are achieved, which improves the reliability of the anchors and the compressive strength of the concrete.
Patent Information
- Application Number
- CN202422748349.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-11-12
AI Technical Summary
The steel strands of existing bridge prestressed anchors are easily loosened during the tensioning process, resulting in unstable fixation and affecting normal use.
The combined structure of bellows, fixing seats, anchor plates and clamps is adopted. By tightening the pulling screws and nuts, the wedge tightening principle of the conical holes is used to combine the spiral ribs to improve the fixing effect of the steel strands to prevent loosening.
Effectively prevent the steel strands from deaning, ensure the normal tensioning and permanent prestress transmission of prestressed anchors, and improve the fixing effect of the steel strands and the compressive strength of the concrete.
Smart Images
Figure CN223292938U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of anchoring devices, in particular to a prestressed anchor for bridges. Background Art
[0002] As the span of concrete bridge structures becomes larger and larger, the forms of components become more and more varied, and the performance requirements are gradually increasing, the prestressed anchor used in prestressed concrete bridges is an anchoring device used in post-tensioned concrete structures or components to maintain the tensile stress of the prestressed tendons and transfer it to the interior of the concrete bridge. It is also called a prestressed anchor.
[0003] The existing technology CN214061273U discloses a prestressed anchor for bridges, which relates to the field of anchor technology and aims to solve the problem that the existing prestressed anchor for bridges is inconvenient to install and operate during use. An anchor plate fixing seat is installed on one side of the anchor plate, a corrugated tube is installed on one side of the anchor plate fixing seat, spiral ribs are installed on the outside of the anchor plate fixing seat, an anchor plate is installed on the other side of the anchor plate, fixing blocks are installed on both ends of one side of the anchor plate, a fixed pressure plate is installed on one side of the anchor plate, a steel strand is installed inside the fixed pressure plate, and a fixing clip is installed on the outside of one end of the steel strand. When in use, the anchor plate facilitates the installation and fixing of the steel strand, and the fixing clip fixes the steel strand. The fixing clip anchors the steel strand by utilizing the wedging principle of the tapered hole, thereby anchoring the steel strand in the tapered hole of the anchor plate.
[0004] However, the existing fixing clip structure is relatively simple when using the above method. During the tensioning process, the steel strands are often loosened from the anchor due to insufficient clamping and fixing of the steel strands, thereby affecting the normal tensioning use of the prestressed anchor. Utility Model Content
[0005] The purpose of the utility model is to provide a prestressed anchor for bridges, which can improve the fixing effect of steel strands and prevent the steel strands from being unanchored.
[0006] To achieve the above-mentioned object, the present invention provides a prestressed anchor for a bridge, comprising a bellows and an anchor assembly, wherein the bellows has a plurality of first positioning holes, each of which is located on a side of the bellows; and the anchor assembly comprises a fixing seat, an anchor plate, and a plurality of clamping members.
[0007] The fixing seat is fixedly connected to the bellows and is located on the side of the bellows; the fixing seat has a plurality of second positioning holes, and the plurality of second positioning holes are respectively connected to the plurality of first positioning holes; the anchor plate is fixedly connected to the fixing seat and is located on the side of the fixing seat, and the anchor plate has a plurality of conical holes, and the plurality of conical holes are respectively connected to the plurality of second positioning holes; the plurality of clamps are respectively located on the sides of the anchor plate, and the clamps include two clips, two connecting pieces, a tensioning screw and two nuts; the two clips are located in the conical holes, and the two connecting pieces are respectively fixedly connected to the two clips and are respectively located on the sides of the two clips; the tensioning screw passes through the two connecting pieces; the two nuts are respectively threadedly connected to the tensioning screw and are located at both ends of the tensioning screw.
[0008] Wherein, the anchoring assembly further includes a spiral rib; the spiral rib is arranged on the side of the corrugated pipe.
[0009] Wherein, the clamping member further includes two fastening structures; the two fastening structures are respectively arranged on the two sides of the clip.
[0010] In which, the fastening structure includes a bracket, an outer column, an inner column, a threaded column and a splint; the bracket and the clip are fixedly connected and are located on the side of the clip; the outer column and the bracket are fixedly connected and are located on the side of the bracket; the inner column and the outer column are slidingly connected and are located on the inner side of the outer column; the threaded column and the outer column are rotationally connected and are threadedly connected to the inner column and are located on the side of the outer column; the splint and the inner column are fixedly connected and are located on the side of the inner column.
[0011] Wherein, the fastening structure further includes a rotating member; the rotating member is fixedly connected to the threaded column and is located on the side of the threaded column.
[0012] Wherein, the rotating member has a cross groove, and the cross groove is located on a side of the rotating member away from the threaded column.
[0013] The utility model relates to a prestressed anchor for bridges. When in use, one end of the steel strand is first passed through the tapered hole on the anchor plate, the second positioning hole on the fixing seat, and the first positioning hole on the corrugated pipe in sequence, and then the two clips are placed on both sides of the steel strand. Subsequently, the tension screw is passed through the two connecting pieces, and the two clips are inserted into the tapered holes. Then, the two nuts are tightened at both ends of the tension screw to make the nuts and the connecting pieces press against each other, so that the two connecting pieces can clamp the steel strand to prevent the steel strand from loosening. The connected whole is buried to In the concrete structure, the other end of the steel strand is then led out and fixedly connected to the fixing seat at the other end, and then stretched by a jack. The clip anchors the steel strand using the wedging principle of the tapered hole. The clip anchors the steel strand in the tapered hole. When the steel strand is tensioned by the jack and reaches the designed stress value, the jack is slowly released. The clip of the anchor is brought into the tapered hole by the uniformly retracting steel strand, forming an anchoring unit. The stress of the steel strand is transmitted to the building structure through the anchor plate and the fixing seat, forming permanent prestress. The present application provides two connecting pieces, the tensioning screws and the two nuts, so that the two connecting pieces can clamp the steel strand, improve the fixing effect of the steel strand, and prevent the steel strand from being unanchored. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.
[0015] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present utility model.
[0016] Figure 2 It is a sectional view of the entire first embodiment of the present utility model.
[0017] Figure 3 It is a structural schematic diagram of the clamping member of the first embodiment of the present utility model.
[0018] Figure 4 It is a schematic diagram of the overall structure of the second embodiment of the present utility model.
[0019] Figure 5 It is a structural schematic diagram of the clamping member of the second embodiment of the present utility model.
[0020] Figure 6 It is a cross-sectional view of a clamping member according to the second embodiment of the present invention.
[0021] 101- bellows, 102- first positioning hole, 103- anchoring assembly, 104- fixing seat, 105- anchor plate, 106- clamping member, 107- second positioning hole, 108- clip, 109- connecting plate, 110- tension screw, 111- nut, 112- tapered hole, 113- spiral rib, 201- fastening structure, 202- bracket, 203- outer column, 204- inner column, 205- threaded column, 206- splint, 207- rotating member, 208- cross slot. DETAILED DESCRIPTION
[0022] The first embodiment of this application is:
[0023] See also Figure 1-Figure 3 ,in, Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention. Figure 2 This is a cross-sectional view of the entire first embodiment of the present invention. Figure 3 It is a structural schematic diagram of the clamping member of the first embodiment of the present utility model.
[0024] The utility model provides a prestressed anchor for bridges, comprising a bellows 101 and an anchor assembly 103, wherein the anchor assembly 103 comprises a fixing seat 104, an anchor plate 105 and a plurality of clamping members 106; the clamping members 106 comprise two clips 108, two connecting pieces 109, a tensioning screw 110, two nuts 111 and a spiral rib 113; the above-mentioned scheme can improve the fixing effect of the steel strand and prevent the steel strand from being unanchored.
[0025] In this embodiment, the corrugated tube 101 has a plurality of first positioning holes 102, and the plurality of first positioning holes 102 are respectively located on the sides of the corrugated tube 101. The first positioning holes 102 on the corrugated tube 101 are for steel strands to pass through.
[0026] The fixing seat 104 is fixedly connected to the bellows 101 and is located on the side of the bellows 101; the fixing seat 104 has a plurality of second positioning holes 107, and the plurality of second positioning holes 107 are respectively connected to the plurality of first positioning holes 102; the anchor plate 105 is fixedly connected to the fixing seat 104 and is located on the side of the fixing seat 104, and the anchor plate 105 has a plurality of tapered holes 112, and the plurality of tapered holes 112 are respectively connected to the plurality of second positioning holes 107; the plurality of clamping members 106 are respectively Located on the side of the anchor plate 105, the clamping member 106 includes two clips 108, two connecting pieces 109, a tension screw 110 and two nuts 111; the two clips 108 are located in the tapered hole 112, and the two connecting pieces 109 are fixedly connected to the two clips 108 and are respectively located on the sides of the two clips 108; the tension screw 110 passes through the two connecting pieces 109; the two nuts 111 are respectively threadedly connected to the tension screw 110 and are located at both ends of the tension screw 110. When in use, first pass one end of the steel strand through the tapered hole 112 on the anchor plate 105, the second positioning hole 107 on the fixing seat 104, and the first positioning hole 102 on the corrugated tube 101 in sequence, then place the two clips 108 on both sides of the steel strand, then pass the tension screw 110 through the two connecting pieces 109, and then insert the two clips 108 into the tapered hole 112, and then tighten the two nuts 111 at both ends of the tension screw 110 so that the nuts 111 and the connecting pieces 109 are pressed tightly, so that the two connecting pieces 109 can clamp the steel strand to prevent the steel strand from loosening; fill the connected whole with It is buried in the concrete structure, and then the other end of the steel strand is led out and fixedly connected to the fixing seat 104 at the other end, and then stretched by a jack. The clip 108 uses the wedging principle of the tapered hole 112 to anchor the steel strand. The clip 108 anchors the steel strand in the tapered hole 112. When the steel strand is tensioned by the jack and reaches the designed stress value, the jack is slowly released, and the clip 108 of the anchor is brought into the tapered hole 112 by the uniformly retracting steel strand, forming an anchoring unit. The stress of the steel strand is transmitted to the building structure through the anchor plate 105 and the fixing seat 104, forming permanent prestress. The present application provides two connecting pieces 109, the tensioning screw 110 and the two nuts 111, so that the two connecting pieces 109 can clamp the steel strand, improve the fixing effect of the steel strand, and prevent the steel strand from being unanchored.
[0027] Secondly, the spiral reinforcement 113 is arranged on the side of the corrugated tube 101. The spiral reinforcement 113 can improve the compressive strength of the concrete, prevent the concrete under the anchor from being locally damaged under the action of the tensile stress, and disperse the stress during tensioning.
[0028] When using the present invention, first pass one end of the steel strand through the tapered hole 112 on the anchor plate 105, the second positioning hole 107 on the fixing seat 104, and the first positioning hole 102 on the corrugated tube 101 in sequence, then place the two clips 108 on both sides of the steel strand, then pass the tension screw 110 through the two connecting pieces 109, and then insert the two clips 108 into the tapered hole 112, and then tighten the two nuts 111 at both ends of the tension screw 110 so that the nuts 111 and the connecting pieces 109 are pressed tightly, so that the two connecting pieces 109 can clamp the steel strand to prevent the steel strand from loosening; the connected whole is buried in the concrete structure, and the spiral reinforcement 113 can improve the concrete The compressive strength of the soil is enhanced to prevent local damage of the concrete under the anchor under the action of tensile stress, and to disperse the stress during tensioning. Then, the other end of the steel strand is led out and fixedly connected to the fixing seat 104 at the other end, and then stretched by a jack. The clip 108 anchors the steel strand by utilizing the wedging principle of the tapered hole 112. The clip 108 anchors the steel strand in the tapered hole 112. When the steel strand is tensioned by the jack and reaches the designed stress value, the jack is slowly released, and the clip 108 of the anchor is brought into the tapered hole 112 by the uniformly retracted steel strand to form an anchoring unit. The stress of the steel strand is transferred to the building structure through the anchor plate 105 and the fixing seat 104, forming permanent prestressing. By providing the two connecting pieces 109, the tensioning screws 110 and the two nuts 111, the present application enables the two connecting pieces 109 to clamp the steel strands, thereby improving the fixing effect of the steel strands and preventing the steel strands from becoming unanchored.
[0029] The second embodiment of this application is:
[0030] Based on the first embodiment, please refer to Figure 4-Figure 6 ,in, Figure 4 This is a schematic diagram of the overall structure of the second embodiment of the present invention. Figure 5 This is a schematic structural diagram of the clamping member of the second embodiment of the utility model. Figure 6 It is a cross-sectional view of a clamping member according to the second embodiment of the present invention.
[0031] The prestressed anchor for a bridge provided by the present invention further includes two fastening structures 201 ; the fastening structure 201 includes a bracket 202 , an outer column 203 , an inner column 204 , a threaded column 205 , a clamping plate 206 and a rotating member 207 .
[0032] According to this specific embodiment, the two fastening structures 201 are respectively provided on the sides of the two clips 108. The two fastening structures 201 can improve the connection stability between the clips 108 and the steel strands and prevent the steel strands from loosening.
[0033] The bracket 202 is fixedly connected to the clip 108 and is located on the side of the clip 108; the outer column 203 is fixedly connected to the bracket 202 and is located on the side of the bracket 202; the inner column 204 is slidably connected to the outer column 203 and is located on the inner side of the outer column 203; the threaded column 205 is rotatably connected to the outer column 203 and is threadedly connected to the inner column 204 and is located on the side of the outer column 203; the clamping plate 206 is fixedly connected to the inner column 204 and is located on the side of the inner column 204. The bracket 202 is used to support the outer column 203. By rotating the threaded column 205 forward, the threaded column 205 causes the inner column 204 to slide along the outer column 203, and the inner column 204 drives the clamping plate 206 to approach the steel strand. The two clamping plates 206 clamp the steel strand to prevent it from loosening.
[0034] Secondly, the rotating member 207 is fixedly connected to the threaded column 205 and is located on the side of the threaded column 205. The staff can rotate the threaded column 205 by twisting the rotating member 207.
[0035] Finally, the rotating member 207 has a cross slot 208, which is located on the side of the rotating member 207 away from the threaded column 205. Inserting a cross tool into the cross slot 208 can facilitate rotating the rotating member 207 and the threaded column 205 to control the position of the clamping plate 206.
[0036] When using the present invention, a cross tool is inserted into the cross slot 208 and the rotating member 207 is rotated forward. The rotating member 207 drives the threaded column 205 to rotate. The threaded column 205 rotates forward so that the inner column 204 slides along the outer column 203. The inner column 204 drives the clamping plate 206 to approach the steel strand. The two clamping plates 206 are used to clamp and fix the steel strand to prevent it from loosening.
[0037] The above disclosure is merely one or more preferred embodiments of the present application and is not intended to limit the scope of the present application. A person skilled in the art will understand that all or part of the processes of the above embodiments and equivalent changes made in accordance with the claims of the present application are still within the scope of the present application.
Claims
1. A prestressed anchor for a bridge, comprising a corrugated pipe, wherein the corrugated pipe has a plurality of first positioning holes, wherein the plurality of first positioning holes are respectively located on the side of the corrugated pipe, characterized in that: Also included is an anchor assembly; The anchor assembly includes a fixing seat, an anchor plate and a plurality of clamping members; The fixing seat is fixedly connected to the bellows and is located on the side of the bellows; the fixing seat has a plurality of second positioning holes, and the plurality of second positioning holes are respectively communicated with the plurality of first positioning holes; the anchor plate is fixedly connected to the fixing seat and is located on the side of the fixing seat, the anchor plate has a plurality of tapered holes, and the plurality of tapered holes are respectively communicated with the plurality of second positioning holes; the plurality of clamping members are respectively located on the sides of the anchor plate, and the clamping members include two clips, two connecting pieces, a tension screw and two nuts; the two clips are located in the tapered holes, and the two connecting pieces are respectively fixedly connected to the two clips and are respectively located on the sides of the two clips; The tension screw rod passes through the two connecting plates; the two nuts are respectively threadedly connected to the tension screw rod and are located at both ends of the tension screw rod.
2. A prestressed anchor for bridges according to claim 1, characterized in that: The anchoring assembly further includes a spiral rib; the spiral rib is arranged on the side of the corrugated pipe.
3. A prestressed anchor for bridges according to claim 2, characterized in that: The clamping member further comprises two fastening structures; the two fastening structures are respectively arranged on two sides of the clip.
4. A prestressed anchor for bridges according to claim 3, characterized in that: The fastening structure includes a bracket, an outer column, an inner column, a threaded column and a clamping plate; the bracket is fixedly connected to the clamping plate and is located on the side of the clamping plate; the outer column is fixedly connected to the bracket and is located on the side of the bracket; The inner column and the outer column are slidably connected and are located on the inner side of the outer column; the threaded column and the outer column are rotatably connected and are threadedly connected to the inner column and are located on the side of the outer column; the splint and the inner column are fixedly connected and are located on the side of the inner column.
5. A prestressed anchor for bridges according to claim 4, characterized in that: The fastening structure further includes a rotating member; the rotating member is fixedly connected to the threaded column and is located on the side of the threaded column.
6. A prestressed anchor for bridges according to claim 5, characterized in that: The rotating member has a cross groove, and the cross groove is located on a side of the rotating member away from the threaded column.