Bridge prestress corrugated pipe end anchoring device

Abstract

The utility model discloses a bridge prestress corrugated pipe end anchoring device which comprises a sheath, a restraint ring and a corrugated pipe which are sequentially connected, a connecting body, a clamping piece and an extrusion anchorage device are arranged in the sheath, and the connecting body abuts against the inner end face, away from the corrugated pipe, of the sheath; one end of a prestressed tendon of a box girder of a first section of a bridge penetrates through the sheath, then penetrates into the connector and is fixedly connected with the clamping piece, and one end of a prestressed tendon of a box girder of a second section of the bridge sequentially penetrates through the corrugated pipe, the restraint ring and the corrugated pipe, then penetrates through the connector and is fixedly connected with the extrusion anchorage device. Waterproof cloth is arranged in the restraining ring, and the waterproof cloth is twisted into a ball under the tensioning effect of prestressed tendons of a box girder of the second section of the bridge to block an inner hole of the restraining ring. The waterproof cloth is arranged in the restraining ring, the waterproof cloth is twisted into a ball through twisting and stretching in the tensioning process of the prestressed tendons to block the inner holes of the restraining ring, and the situation that water vapor, rainwater and the like enter through the corrugated pipe, and consequently the prestressed tendons are rusted is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge construction technical field especially relates to a bridge prestress bellows pipe end anchoring device. BACKGROUND

[0002] The anchor device is a permanent anchoring device used in prestressed concrete, and is an anchoring tool used in post-tensioned structures or members to maintain the tension of the prestressed tendon and transmit the tension to the inside of the concrete, also known as a prestressed anchor device. The existing anchor device includes a fixed end anchor device and a tensioning section anchor device, and the tensioning section anchor device is tensioned by a clamp cooperating with a jack; the prestressed tendon in the continuous concrete structure is connected by a connector. However, in the process of tensioning the jack, the existing anchor device and the connector are often affected by the tensioning reaction force, which often causes the connector to move towards the bridge body, eventually leading to accidents such as damage to the bridge body. And in the construction process, water vapor and rainwater often enter through the bellows pipe, causing the prestressed tendon to rust, thereby shortening the service life. SUMMARY

[0003] The utility model provides a bridge prestress bellows pipe end anchoring device to solve the above technical problem.

[0004] In order to achieve the above purpose, the technical scheme of the utility model is as follows:

[0005] A bridge prestress bellows pipe end anchoring device, comprising: a sheath, a restraint ring and a bellows connected in sequence, a connecting body, a clamping piece and an extrusion anchor device are arranged in the sheath, the connecting body abuts against the inner end face of the sheath away from the bellows; one end of the prestressed tendon of the box girder of the first section of the bridge passes through the sheath, then passes into the connecting body and is connected and fixed with the clamping piece, one end of the prestressed tendon of the box girder of the second section of the bridge passes through the bellows, the restraint ring and the bellows in sequence, then passes through the connecting body and is connected and fixed with the extrusion anchor device; a waterproof cloth is arranged in the restraint ring, and the waterproof cloth is twisted into a bundle under the tensioning action of the prestressed tendon of the box girder of the second section of the bridge and blocks the inner hole of the restraint ring.

[0006] Preferably, the sheath is provided with a support disc, the support disc is perpendicular to the center line of the sheath and is fixedly connected with the sheath; an elastic member is fixedly arranged on one side of the support disc away from the bellows, and one end of the elastic member away from the support disc abuts against the box girder of the first section of the bridge; when the outer end face of the sheath away from the bellows abuts against the box girder of the first section of the bridge, the elastic force generated by the elastic member is smaller than the limit pressure of the pressure type damage of the box girder of the first section.

[0007] Preferably, the elastic member comprises a plurality of springs, the plurality of springs are circumferentially distributed around the axis of the support disc, one end of the spring is fixedly connected with the support disc, and the other end of the spring abuts against the box girder of the first section of the bridge.

[0008] Preferably, the sheath is fixed with a protective cushion layer away from the outer end surface of the corrugated pipe, and the protective cushion layer is used for buffering the sheath away from the outer end surface of the corrugated pipe after abutting the box girder of the first segment of the bridge.

[0009] Preferably, the protective cushion layer is made of high-damping rubber material.

[0010] Preferably, the sheath is made of stainless steel material.

[0011] Beneficial effects:

[0012] The bridge prestressed corrugated pipe end anchoring device disclosed in the application avoids damage to the bridge body caused by the anchoring device when the jack tensioning prestressed tendons by welding a support disc on the outer side of the sheath and by means of the elastic element and the protective cushion layer on the support disc. By setting a waterproof cloth in the restraint ring and by twisting and stretching the waterproof cloth during the tensioning process of the prestressed tendons, the waterproof cloth is twisted into a bundle to block the inner hole of the restraint ring, thereby avoiding water vapor and rainwater from entering through the corrugated pipe to cause corrosion of the prestressed tendons. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0014] Figure 1 The installation position schematic view of the bridge prestressed corrugated pipe end anchoring device disclosed in the present application;

[0015] Figure 2 The structure schematic view of the bridge prestressed corrugated pipe end anchoring device disclosed in the present application;

[0016] Figure 3 The assembly schematic view of the sheath, the restraint ring, the waterproof cloth, the support disc, the elastic element and the protective cushion layer of the bridge prestressed corrugated pipe end anchoring device disclosed in the present application.

[0017] 1, box girder; 11, prestressed tendon; 311, sheath; 312, restraint ring; 313, corrugated pipe; 321, connecting body; 322, clamping piece; 323, extrusion anchor; 33, waterproof cloth; 34, support disc; 35, elastic element; 36, protective cushion layer. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model below. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0019] A bridge prestressed corrugated pipe end anchoring device, in combination with Figure 1 、 Figure 2 and Figure 3 , comprising: sheath 311, restraint ring 312 and corrugated pipe 313 connected in sequence, connecting body 321, clamping piece 322 and extrusion anchor 323 are arranged in sheath 311, connecting body 321 is abutted on the inner end face of sheath 311 away from corrugated pipe 313; one end of the prestressed tendon 11 of the box girder 1 of the first segment of the bridge passes through sheath 311, then passes into connecting body 321 and is connected and fixed with clamping piece 322, one end of the prestressed tendon 11 of the box girder 1 of the second segment of the bridge passes through corrugated pipe 313, restraint ring 312 and corrugated pipe 313 in sequence, then passes through connecting body 321 and is connected and fixed with extrusion anchor 323; waterproof cloth 33 is arranged in restraint ring 312, and the waterproof cloth 33 is twisted into a bundle under the tension of the prestressed tendon 11 of the box girder 1 of the second segment of the bridge and blocks the inner hole of the restraint ring 312. The twisting and stretching in the tension process of the prestressed tendon 11 make the waterproof cloth 33 twisted into a bundle, and the waterproof cloth 33 can tightly abut against the inner wall of the restraint ring 312 to plug the inner hole of the restraint ring 312, so that water vapor and rainwater cannot enter through the corrugated pipe 313 to cause the rust of the prestressed tendon 11, connecting body 321, clamping piece 322 and extrusion anchor 323, the service life of the anchoring device is also prolonged while the engineering quality is maintained.

[0020] Specifically, one end of the restraint ring 312 is sleeved on the sheath 311 and the other end is sleeved on the corrugated pipe 313, the restraint ring 312 tightly clamps the sheath 311 and the corrugated pipe 313 to connect the sheath 311 and the corrugated pipe 313, and the sealing of the connecting position of the sheath 311, the restraint ring 312 and the corrugated pipe 313 is realized.

[0021] Specifically, the middle part of the restraint ring 312 is a tapered part, the small head end of the tapered part faces the corrugated pipe 313, and under the tension of the prestressed tendon 11, the waterproof cloth 33 can plug the small head end of the tapered part to further strengthen the sealing effect.

[0022] Preferably, the sheath 311 is sleeved with a support disc 34 which is perpendicular to the center line of the sheath 311 and fixedly connected with the sheath 311; the support disc 34 is fixedly provided with an elastic member 35 on the side away from the corrugated pipe 313, and the end of the elastic member 35 away from the support disc 34 abuts against the box girder 1 of the first segment of the bridge; when the sheath 311 abuts against the box girder 1 of the first segment of the bridge on the outer end face away from the corrugated pipe 313, the elastic force generated by the elastic member 35 is less than the limit pressure of the pressure type damage of the box girder 1 of the first segment. When tensioning is needed, the support disc 34 is abutted against the acting surface of the tensioning tool for tensioning the prestressed tendon 11, and the jack of the tensioning tool exerts a pulling force on the prestressed tendon 11. The anchoring device is slowly moved towards the box girder 1, and the elastic deformation of the elastic member 35 is used for buffering, so that the pressure type damage of the box girder 1 is avoided.

[0023] Preferably, the elastic member 35 comprises a plurality of springs which are circumferentially distributed around the axis of the support disc 34, and one end of the spring is fixedly connected with the support disc 34 and the other end abuts against the box girder 1 of the first segment of the bridge. The plurality of springs can increase the contact area with the box girder 1, so that a better buffering effect is achieved. Moreover, the manufacturing cost and maintenance cost of the plurality of springs are lower than those of a single elastic member.

[0024] Preferably, the sheath 311 is fixedly provided with a protective cushion layer 36 on the outer end face away from the corrugated pipe 313, and the protective cushion layer 36 is used for buffering after the sheath 311 abuts against the box girder 1 of the first segment of the bridge on the outer end face away from the corrugated pipe 313. When the spring is compressed to a certain extent and the protective cushion layer 36 abuts against the box girder 1, the spring is prevented from being further compressed to generate an excessive elastic force to damage the box girder 1 by the buffering of the protective cushion layer 36.

[0025] Preferably, the protective cushion layer 36 is made of high-damping rubber material, and the protective cushion layer 36 is bonded to the end face of the sheath 311.

[0026] Preferably, the sheath 311 is made of stainless steel material, the support disc 34 is made of stainless steel material, the support disc 34 is fixedly welded to the outer periphery of the sheath 311, and the spring is fixedly welded to the support disc 34.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can still be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A bridge prestressed corrugated pipe end head anchoring device, characterized in that, The utility model relates to a box girder prestressed anchor device, which comprises a sheath (311), a constraint ring (312) and a bellows (313) connected in sequence, a connecting body (321), a clamping piece (322) and an extrusion anchor (323) are arranged in the sheath (311), the connecting body (321) abuts against the inner end face of the sheath (311) away from the bellows (313), one end of the prestressed tendon (11) of the box girder (1) of the first section of the bridge passes through the sheath (311), then passes into the connecting body (321) and is connected and fixed with the clamping piece (322), one end of the prestressed tendon (11) of the box girder (1) of the second section of the bridge passes through the bellows (313), the constraint ring (312) and the bellows (313) in sequence, then passes through the connecting body (321) and is connected and fixed with the extrusion anchor (323), a waterproof cloth (33) is arranged in the constraint ring (312), and the waterproof cloth (33) is twisted into a bundle under the tension of the prestressed tendon (11) of the box girder (1) of the second section of the bridge and blocks the inner hole of the constraint ring (312). A support disc (34) is arranged on the sheath (311), the support disc (34) is perpendicular to the center line of the sheath (311) and is fixedly connected with the sheath (311), an elastic member (35) is fixedly arranged on the side of the support disc (34) away from the bellows (313), one end of the elastic member (35) away from the support disc (34) abuts against the box girder (1) of the first section of the bridge, when the outer end face of the sheath (311) away from the bellows (313) abuts against the box girder (1) of the first section of the bridge, the elastic force generated by the elastic member (35) is smaller than the limit pressure of the pressure type damage of the box girder (1) of the first section.

2. A bridge prestressed corrugated pipe end anchorage device according to claim 1, characterized in that, The elastic member (35) comprises a plurality of springs, the plurality of springs are circumferentially distributed around the axis of the support disc (34), one end of the spring is fixedly connected with the support disc (34), and the other end of the spring abuts against the box girder (1) of the first section of the bridge.

3. A bridge prestressed corrugated pipe end anchorage device according to claim 2, characterized in that, A protective cushion layer (36) is fixedly arranged on the outer end face of the sheath (311) away from the bellows (313), and the protective cushion layer (36) is used for buffering after the outer end face of the sheath (311) away from the bellows (313) abuts against the box girder (1) of the first section of the bridge.

4. A bridge prestressed corrugated pipe end anchorage device according to claim 2, characterized in that, The protective cushion layer (36) is made of high-damping rubber material.

5. A bridge prestressed corrugated pipe end anchorage device according to claim 4, characterized in that, The sheath (311) is made of stainless steel material.

6. A bridge pre-stressed corrugated pipe end anchorage device according to claim 1, characterized in that, ​

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