CN212505856U - Double-helix ladder tooth high-strength prestressed rib anchoring system - Google Patents
Double-helix ladder tooth high-strength prestressed rib anchoring system Download PDFInfo
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- CN212505856U CN212505856U CN202021790201.3U CN202021790201U CN212505856U CN 212505856 U CN212505856 U CN 212505856U CN 202021790201 U CN202021790201 U CN 202021790201U CN 212505856 U CN212505856 U CN 212505856U
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- strength prestressed
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Abstract
The utility model relates to a double helix ladder tooth high-strength prestressed reinforcement anchoring system, which comprises a corrugated pipe, a connecting sleeve, a backing plate, a high-strength prestressed reinforcement penetrating through the corrugated pipe, a nut screwed on the high-strength prestressed reinforcement, a spiral reinforcement outside the corrugated pipe, and cement slurry filled in the corrugated pipe after the high-strength prestressed reinforcement is tensioned; the outer surface of the corrugated pipe is of a spiral corrugated structure, the connecting sleeve is provided with a thread inner wall and is sealed and screwed at the end part of the corrugated pipe, and the connecting sleeve is fixedly connected with the cushion plate and forms a sealing structure at the contact part. The connecting sleeve and the corrugated pipe are connected in a screwing mode, a sealing structure is formed between the connecting sleeve and the corrugated pipe along with the screwing of the connecting sleeve and the corrugated pipe, a good sealing effect is achieved after the connecting sleeve is connected, and the base plate and the connecting sleeve are fixedly and hermetically connected, so that the bridge is prevented from leaking into the corrugated pipe when concrete is poured, the corrugated pipe is prevented from being blocked, and the smooth perforation of the high-strength prestressed reinforcement is ensured.
Description
Technical Field
The utility model belongs to prestressed anchorage system structure especially relates to a two spiral ladder tooth high-strength prestressed reinforcement anchorage system.
Background
The bridge span structure is a bridge constructed by adopting prestressed concrete. The bridge can make the concrete be pre-stressed before loading by using the reaction force of the pretension of the steel bars or steel wires (cables). In prestressed concrete bridges, in order to reduce the dead weight, large-span solid web girders are usually prestressed in three directions: that is, in addition to the longitudinally necessary prestressing, transverse prestressing is applied in the deck slab to thin the deck slab, and vertical prestressing is applied in the web to reduce the web thickness.
The existing vertical prestressed anchorage system mainly adopts a bonded finish-rolled twisted steel anchorage system consisting of finish-rolled twisted steel, nuts and a matched anchor backing plate, a corrugated pipe is arranged in advance on a concrete bridge to form a through hole, and the finish-rolled twisted steel is punched, anchored, tensioned and then grouted. However, in the anchoring structure with the structure, concrete is easy to infiltrate into the through hole from the end part of the corrugated pipe during pouring, so that the finish rolling threaded steel bar is difficult to perforate; due to the use of the finish rolling twisted steel, the prestress anchoring loss is large, and the reliability and the service life of an anchoring structure are influenced; a gap is formed between the anchor backing plate and the corrugated pipe, and slurry leakage can be formed in the gap, so that the bridge is hollow and the quality of the bridge is influenced.
The instantaneous loss of the prestress is large when the short prestressed tendon is released, the effective prestress is lower than the design value, the prestress is insufficient, the bearing capacity of the beam body is lower than the design value, and the risk of the beam body cracking exists.
Disclosure of Invention
The utility model provides a two spiral ladder tooth high-strength prestressed reinforcement anchorage system, the bellows preset before the concrete bridge is pour and form the through-hole, and bellows tip spiral connection cover forms sealing connection, adapter sleeve and backing plate sealing connection to realize that the bellows tip is sealed, in permeating the pore that the bellows formed when avoiding concrete placement, avoid hindering prestressed reinforcement and perforate.
The utility model provides a two spiral ladder tooth high-strength prestressed reinforcement anchorage system, corrugated pipe preset formation pore before concrete bridge pours, and bellows tip spiral connection cover forms sealing connection, avoids the outside formation space of screw thread of bellows, avoids causing the bridge to be empty.
The utility model discloses a concrete technical scheme does: a double-spiral ladder tooth high-strength prestressed reinforcement anchoring system comprises a corrugated pipe, connecting sleeves, a base plate, high-strength prestressed reinforcements, nuts and spiral reinforcements, wherein the corrugated pipe is preset in a bridge concrete structure, the connecting sleeves are connected to two ends of the corrugated pipe in a sealing mode, the base plate is connected with the connecting sleeves in a sealing mode, the high-strength prestressed reinforcements penetrate through the corrugated pipe, the nuts are screwed on the high-strength prestressed reinforcements, the spiral reinforcements are arranged outside the corrugated pipe, and cement slurry is filled into the corrugated pipe after the high-strength prestressed reinforcements are tensioned; the appearance of the corrugated pipe is of a spiral corrugated structure, the connecting sleeve is provided with a thread inner wall and is sealed and screwed at the end part of the corrugated pipe, the connecting sleeve is fixedly connected with the cushion plate and forms a sealing structure at the contact part, and the high-strength prestressed ribs adopt double-spiral ladder tooth high-strength prestressed ribs.
The two ends of the corrugated pipe are hermetically connected with the connecting sleeves, so that the connecting sleeves and the corrugated pipe can achieve a good sealing effect after being connected, the corrugated pipe adopts the corrugated pipe with a spiral corrugated structure on the outer surface, the connecting sleeves are provided with inner holes, the inner walls of the inner holes are threaded inner walls, the connecting between the connecting sleeves and the corrugated pipe adopts a screwing mode which is equivalent to a threaded matching mode of a bolt and a nut, a sealing structure is formed between the connecting sleeves and the corrugated pipe along with the screwing between the connecting sleeves and the corrugated pipe, and the cushion plate and the connecting sleeves are hermetically connected, so that the bridge is prevented from leaking into the corrugated pipe when concrete is poured, the corrugated pipe is prevented from being; the connecting sleeve is spirally connected with the corrugated pipe, so that a compact structure is formed between the connecting sleeve and the outside of the corrugated pipe, no gap is generated, and the phenomenon that the interior of a bridge concrete structure is hollow is avoided; the connecting sleeve is spirally connected with the corrugated pipe, the connecting sleeve is fixedly connected with the base plate and sealed, the base plate, the connecting sleeve, the corrugated pipe, the connecting sleeve and the base plate are combined into a reliable and stable integrated structure, and the interior of the corrugated pipe can be well protected; the connecting sleeve is spirally connected with the corrugated pipe, so that better axial acting force can be generated, meanwhile, sealing is conveniently realized, and the overlapping length of the connecting sleeve and the corrugated pipe can be shortened due to the spiral connection.
Further preferably, the connecting sleeve is of a T-shaped structure and comprises a sleeve column and a connecting ring, a threaded hole is formed in the axis of the sleeve column, and the threaded hole is matched with threads on the outer surface of the corrugated pipe. The sleeve column part is connected with the corrugated pipe, and the connecting ring is used for connecting with the end face of the base plate; generally, the surface of the connecting ring is kept flat, and the end face of the backing plate is kept flat, so that the connecting ring and the end face of the backing plate are in contact connection and fixed to achieve better sealing.
Preferably, the outer surface of the end part of the corrugated pipe is coated with a glue layer, and the sleeve column is screwed into the corrugated pipe; the end face of the connecting ring is coated with a glue layer which is contacted with the base plate and is connected with the base plate through a connecting piece, or a glue pad is arranged between the connecting ring and the base plate and is connected with the base plate through a connecting piece. The glue layer is coated, the operation is convenient, and after the glue layer is coated, the connecting sleeve is spirally connected with the corrugated pipe, so that the sealing of the connecting sleeve and the corrugated pipe can be realized.
Further preferably, the backing plate is a flat backing plate, and a concave spherical surface is arranged on the end surface of the backing plate, which penetrates out corresponding to the anchor hole; the end of the nut screwed on the high-strength prestressed tendon is provided with a ball head, and the ball head is matched with the concave spherical surface on the base plate. The flat base plate is mainly convenient to process and is also convenient to connect and fix with the connecting sleeve; the nut and the backing plate are assembled in a spherical mode, so that the nut can be axially adjusted relative to the anchor hole of the backing plate, and the tensioning direction of high-strength prestress is guaranteed.
Further preferably, the backing plate is provided with a grouting hole, the grouting hole is inclined, one end of the grouting hole avoids the nut and is positioned outside the concave spherical surface, and the other end of the grouting hole is positioned in the corrugated pipe.
More preferably, the nut is a cylindrical nut. The nut is a cylindrical nut, an apparent polygonal structure does not need to be processed, the processing is simple, and the processing cost can be reduced.
More preferably, the outer surface of the cylindrical nut is provided with a radial hole and a nut wrench; the nut wrench is provided with a handle part and a bent part, the end part of the bent part is provided with a connecting column which is internally buckled, and the connecting column is matched with the radial hole to screw the nut.
Preferably, the double-helix stepped thread is a cold extrusion continuous thread, the thread pitch l of the double-helix stepped thread is 10-60mm, the included angle a of the thread form is 75-105 degrees, and the thread height h of the thread is 1.2-15 mm. The high-strength prestressed rib adopts a double-spiral ladder tooth high-strength prestressed rib, and after the nut is matched, a larger force can be anchored by using fewer teeth, so that the anchoring effect is good; the design tension force is achieved, the height of the nut can be smaller, the engineering cost is further reduced, and meanwhile, the length of an anchoring area of the high-strength prestressed reinforcement can be shortened; the nut is tightly attached to the high-strength prestressed rib of the double-spiral ladder tooth, and the prestress loss is low during tension releasing; the high-strength prestressed bars of the double-spiral ladder teeth penetrate into the pore passages and are tensioned and then are grouted, and the high-strength prestressed bars have better holding performance with grouting materials.
The utility model has the advantages that: 1. the corrugated pipe adopts a corrugated pipe with a spiral corrugated structure, the connecting sleeve is provided with an inner hole, the inner wall of the inner hole is a threaded inner wall, the connecting between the connecting sleeve and the corrugated pipe adopts a screwing mode, which is equivalent to a threaded matching mode of a bolt and a nut, a sealing structure is formed between the connecting sleeve and the corrugated pipe along with the screwing between the connecting sleeve and the corrugated pipe, a better sealing effect is achieved after the connecting, and the backing plate and the connecting sleeve are fixedly and hermetically connected, so that the leakage into the corrugated pipe when the bridge is used for pouring concrete is avoided, the corrugated pipe is prevented from being blocked, and the smooth perforation of high-strength prestressed;
2. the connecting sleeve is spirally connected with the corrugated pipe, so that a compact structure is formed between the connecting sleeve and the outside of the corrugated pipe, no gap is generated, and the phenomenon that the interior of a bridge concrete structure is hollow is avoided;
3. the connecting sleeve is spirally connected with the corrugated pipe, the connecting sleeve is fixedly connected with the base plate and sealed, the base plate, the connecting sleeve, the corrugated pipe, the connecting sleeve and the base plate are combined into a reliable and stable integrated structure, and the interior of the corrugated pipe can be well protected;
4. the connecting sleeve is spirally connected with the corrugated pipe, so that better axial acting force can be generated, meanwhile, sealing is conveniently realized, and the spiral connection can also shorten the connection overlapping length of the connecting sleeve and the corrugated pipe;
5. the prestressed tendon is a double-helix trapezoidal tooth, and after the nut is matched, the nut can be anchored by using less teeth to apply larger force, so that the anchoring effect is good; the design tension force is achieved, the height of the nut can be smaller, the engineering cost is further reduced, and meanwhile, the length of an anchoring area of the high-strength prestressed reinforcement can be shortened; the nut is tightly attached to the high-strength prestressed rib of the double-spiral ladder tooth, and the prestress loss is low during tension releasing; the high-strength prestressed bars of the double-spiral ladder teeth penetrate into the pore passages and are tensioned and then are grouted, and the high-strength prestressed bars have better holding performance with grouting materials.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the high-strength prestressed reinforcement of the present invention;
FIG. 3 is an enlarged view of the ladder teeth of the high-strength prestressed reinforcement shown in FIG. 2 according to the present invention;
fig. 4 is a schematic structural view of a backing plate of the present invention;
fig. 5 is a schematic structural view of a nut runner according to the present invention;
in the figure: 1. high-strength prestressed bars, 2, nuts, 3, a cushion plate, 4, a connecting sleeve, 5, a connecting ring, 6, a sleeve column, 7, a corrugated pipe, 8, spiral bars, 9, pore channels, 10, radial holes, 11, grouting holes, 12, a concave spherical surface, 13, a nut wrench, 14, a handle part, 15, a bent part, 16 and a connecting column.
Detailed Description
The invention will be further described with reference to specific embodiments and with reference to the accompanying drawings.
Example (b):
as shown in figure 1, the double-spiral ladder tooth high-strength prestressed rib anchoring system comprises a corrugated pipe 7 which is preset in a bridge concrete structure, connecting sleeves 4 which are connected with two ends of the corrugated pipe in a sealing mode, a base plate 3 which is connected with the connecting sleeves in a sealing mode, high-strength prestressed ribs 1 which penetrate through the corrugated pipe, nuts 2 which are screwed on the high-strength prestressed ribs, spiral ribs 8 which are arranged outside the corrugated pipe, and cement slurry is filled in the corrugated pipe after the high-strength prestressed ribs are tensioned. The spiral rib is sleeved outside the corrugated pipe, and a sufficient gap is reserved between the inner circle of the spiral rib and the outer surface of the corrugated pipe, and the gap is generally controlled to be 15-20 cm.
In this embodiment, the high-strength prestressed reinforcement is a double-spiral ladder tooth high-strength prestressed reinforcement. The double-helix trapezoidal thread is a cold extrusion continuous thread, the thread pitch l of the double-helix trapezoidal thread is 10-60mm, the included angle a of the thread shape is 75-105 degrees, and the thread height h of the thread is 1.2-15 mm. In this embodiment (as shown in fig. 2 and 3), the thread pitch l is 16.5mm, the included angle a is 90 °, and the height h of the thread is 1.86 mm.
The connecting sleeve is of a T-shaped structure and comprises a sleeve column 6 and a connecting ring 5, a threaded hole is formed in the axis of the sleeve column, and the wall thickness of the sleeve column is larger than that of the connecting ring. The appearance of bellows is spiral ripple structure, and the screw hole of adapter sleeve cooperatees with the screw thread of bellows outward appearance, and the cover post of adapter sleeve is twisted soon and is twisted in bellows tip, and screw thread fit makes and forms spiral seal between adapter sleeve and the bellows. In order to increase the sealing effect, the end part of the corrugated pipe is coated with a resin glue layer, and then the connecting sleeve is screwed after coating. The connecting sleeve is connected with the corrugated pipe in a rotating mode, and the end face of the connecting ring of the connecting sleeve faces the outer end position. After the connecting sleeve is screwed with the corrugated pipe, the end part of the corrugated pipe is flush with the end surface of the connecting ring.
As shown in fig. 4, the shim plate is a flat shim plate, a concave spherical surface 12 is arranged on the end surface of the shim plate corresponding to the high-strength prestressed tendon, and the other end surface is a plane. The end face of the connecting ring of the connecting sleeve is in contact with the flat end face of the base plate, the periphery of the anchor hole of the base plate is provided with a connecting screw hole, the connecting ring is provided with a connecting hole, after the connecting ring is in contact with the base plate, the connecting hole corresponds to the connecting screw hole, and a screw penetrates through the connecting hole and is screwed into the connecting screw hole to fix the connecting sleeve and the base plate. In order to improve the sealing between the connecting sleeve and the base plate, the end face of the connecting ring is coated with a resin glue layer. The diameter of the anchor hole in the center of the base plate is larger than the maximum outer diameter of the high-strength prestressed tendon. The backing plate is provided with a grouting hole 11 which is inclined, one end of the grouting hole avoids the nut and is positioned outside the concave spherical surface, and the other end of the grouting hole is positioned in the corrugated pipe.
The nut is a cylindrical nut, the end part of the cylindrical nut is provided with a ball head, and the ball head is matched with the concave spherical surface on the backing plate. The cylindrical nut is externally provided with a radial hole 10 and is provided with a nut runner 13. As shown in fig. 5, the nut runner has a shank 14 and a bend 15, the end of which is provided with a connecting post 16 that is internally threaded and cooperates with the radial hole to screw the nut. In this embodiment, the spliced pole is all set up at the both ends of bight, and the spliced pole is relative.
The bellows adopts the PE material, and the adapter sleeve adopts the PE material.
A construction method of a double-spiral ladder tooth high-strength prestressed reinforcement anchoring system comprises the following steps:
a, preparing materials, namely manufacturing a high-strength prestressed rib 1 with required length, a base plate 3 with proper specification, a corrugated pipe 7 with required length, a connecting sleeve 4 in threaded fit with the corrugated pipe, a nut 2 in threaded fit with the high-strength prestressed rib and a spiral rib 8;
b, presetting: after being assembled, the corrugated pipe, the connecting sleeve and the base plate are arranged in a bridge steel bar structure and are fixed to form a prestressed pore channel 9, a spiral rib is sleeved outside the corrugated pipe to ensure that the corrugated pipe and the connecting sleeve are sealed, the connecting sleeve and the base plate are sealed, and two ends of the pore channel are communicated;
c, pouring the main beam to form a concrete structure, and waiting for the strength of the main beam to reach the design strength;
d, placing a high-strength prestressed rib into the duct, wherein two ends of the high-strength prestressed rib penetrate through the base plate and are screwed with a nut 2 at the extending end, and the ball head of the nut corresponds to the concave spherical surface of the base plate;
e, tensioning, namely tensioning the high-strength prestressed bars to a designed tension according to requirements, and screwing a locking nut by using a nut wrench;
f, grouting, namely grouting the whole prestressed duct, injecting cement slurry into the duct from a grouting hole of the lower base plate, injecting the cement slurry from the lower end of the duct to the higher end of the duct in a pressing manner, and completely grouting one concentrated duct at a time in the grouting process.
The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent transformation of doing above embodiment the utility model discloses technical scheme's protection scope.
Claims (8)
1. A double-spiral ladder tooth high-strength prestressed rib anchoring system is characterized by comprising a corrugated pipe (7) arranged in a bridge concrete structure in advance, connecting sleeves (4) connected to two ends of the corrugated pipe in a sealing mode, a base plate (3) connected with the connecting sleeves in a sealing mode, high-strength prestressed ribs (1) penetrating through the corrugated pipe, nuts (2) screwed on the high-strength prestressed ribs, spiral ribs (8) located outside the corrugated pipe, and cement slurry is filled in the corrugated pipe after the high-strength prestressed ribs are stretched; the appearance of the corrugated pipe is of a spiral corrugated structure, the connecting sleeve is provided with a thread inner wall and is sealed and screwed at the end part of the corrugated pipe, the connecting sleeve is fixedly connected with the cushion plate and forms a sealing structure at the contact part, and the high-strength prestressed ribs adopt double-spiral ladder tooth high-strength prestressed ribs.
2. The system of claim 1, wherein the connecting sleeve is of a T-shaped structure and comprises a sleeve column (6) and a connecting ring (5), the axis of the sleeve column is a threaded hole, and the threaded hole is matched with threads on the outer surface of the corrugated pipe.
3. The system of claim 2, wherein the rubber layer is coated on the outer surface of the end of the corrugated pipe, and the sleeve column is screwed into the corrugated pipe; the end face of the connecting ring is coated with a glue layer which is contacted with the base plate and is connected with the base plate through a connecting piece, or a glue pad is arranged between the connecting ring and the base plate and is connected with the base plate through a connecting piece.
4. The anchoring system of the double-spiral ladder tooth high-strength prestressed rib according to claim 1, 2 or 3, characterized in that the backing plate is a flat backing plate, and a concave spherical surface (12) is arranged on the end surface of the backing plate corresponding to the anchor hole; the end of the nut screwed on the high-strength prestressed tendon is provided with a ball head, and the ball head is matched with the concave spherical surface on the base plate.
5. The system of claim 4, wherein the backing plate is provided with grouting holes (11) which are inclined, one end of each grouting hole is positioned outside the concave spherical surface while avoiding the nut, and the other end of each grouting hole is positioned in the corrugated pipe.
6. The system of claim 1, wherein the nut is a cylindrical nut.
7. The anchoring system of the double-helix ladder tooth high-strength prestressed bar as claimed in claim 6, wherein the outer surface of the cylindrical nut is provided with radial holes (10) and a nut wrench (13) is arranged; the nut wrench is provided with a handle part (14) and a bent part (15), the end part of the bent part is provided with a connecting column (16) which is internally buckled, and the connecting column is matched with the radial hole to screw the nut.
8. The anchoring system as claimed in claim 1, 2 or 3, wherein the double helical step thread is a cold extrusion continuous thread, the pitch l of the double helical step thread is 10-60mm, the included angle a of the thread is 75-105 °, and the height h of the thread is 1.2-15 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021790201.3U CN212505856U (en) | 2020-08-25 | 2020-08-25 | Double-helix ladder tooth high-strength prestressed rib anchoring system |
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| CN202021790201.3U CN212505856U (en) | 2020-08-25 | 2020-08-25 | Double-helix ladder tooth high-strength prestressed rib anchoring system |
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| CN212505856U true CN212505856U (en) | 2021-02-09 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926703A (en) * | 2020-08-25 | 2020-11-13 | 浙锚科技股份有限公司 | High-strength prestressed reinforcement anchoring system and construction method thereof |
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- 2020-08-25 CN CN202021790201.3U patent/CN212505856U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111926703A (en) * | 2020-08-25 | 2020-11-13 | 浙锚科技股份有限公司 | High-strength prestressed reinforcement anchoring system and construction method thereof |
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