CN213204703U

CN213204703U - Tubular anchor backing plate anchoring system

Info

Publication number: CN213204703U
Application number: CN202021789464.2U
Authority: CN
Inventors: 骆玉智; 胡尧庆; 曾利; 杨磊
Original assignee: Zhemao Science & Technology Co ltd
Current assignee: Zhemao Science & Technology Co ltd
Priority date: 2020-08-25
Filing date: 2020-08-25
Publication date: 2021-05-14
Anticipated expiration: 2030-08-25

Abstract

The utility model relates to a tubular anchor backing plate anchoring system, which comprises a corrugated pipe preset in a concrete structure, connecting sleeves hermetically connected with both ends of the corrugated pipe, an anchor backing plate hermetically connected with the connecting sleeves, a stay rope penetrating in the corrugated pipe, a clamping piece sleeved at the end part of a steel strand of the stay rope, and an anchor plate supported by the anchor backing plate and matched with the clamping piece for tensioning; the outer surface of the corrugated pipe is of a spiral corrugated structure, the connecting sleeve is provided with a threaded inner wall and is sealed and screwed at the end part of the corrugated pipe, and the connecting sleeve is fixedly connected with the anchor backing plate and forms a sealing structure at the contact part; the anchor backing plate is a steel pipe section with required wall thickness and outer diameter. The anchor backing plate adopts the steel pipe section, and the length cuts as required in other words, and the wall thickness and the external diameter of steel pipe satisfy needs, that is to say the internal diameter of steel pipe satisfies the hole size needs of anchor backing plate, and the wall thickness of steel pipe satisfies the intensity needs of anchor backing plate, certainly through the selection of steel pipe material, can suitably reduce the wall thickness of steel pipe.

Description

Tubular anchor backing plate anchoring system

Technical Field

The utility model belongs to anchor system field especially relates to a tubular anchor backing plate anchor system.

Background

The prestress technology refers to an anchoring mode and a tensioning system of prestress. The prestressed anchoring technology has been widely applied and vigorously developed in various fields such as hydropower, mines, traffic and the like. The existing prestressed member puts higher and higher requirements on the structural performance of the prestressed anchoring system, and with the improvement of the strength of the steel strand, the continuous application of external prestress and the use of high-grade concrete, the use of the high-performance and high-efficiency anchoring system becomes necessary.

The prestressed anchorage system can be divided into a steel wire anchorage device, a steel bar anchorage device, a steel strand anchorage device and an FRP anchorage device according to the requirements of anchoring different prestressing forces. At present, various prestressed structures mainly adopt steel strands as prestressed tendons.

The prestressed anchorage system needs to use an anchor backing plate, the prestressed tendons are clamped and fixed by the anchor plate, and the anchor backing plate supports the anchor plate during prestressed construction.

However, most of the existing anchor backing plates are made of cast iron, but the cast iron anchor backing plates are irregular in appearance, need sand mould casting, and are troublesome to manufacture, and casting defects easily occur in the anchor backing plates cast by the sand mould, so that the manufacturing period is long.

Disclosure of Invention

The utility model provides a tubulose anchor backing plate anchor system utilizes the steel pipe that needs wall thickness and size directly to carry out cutting process preparation anchor backing plate, recycles adapter sleeve sealing connection bellows and anchor backing plate to preset the pore in the realization concrete, anchor backing plate simple manufacture.

The utility model discloses a concrete technical scheme does: a tubular anchor backing plate anchoring system comprises a corrugated pipe preset in a concrete structure, connecting sleeves connected to two ends of the corrugated pipe in a sealing mode, an anchor backing plate connected with the connecting sleeves in a sealing mode, a stay rope penetrating through the corrugated pipe, clamping pieces sleeved on the ends of steel strands of the stay rope, and an anchor plate supported by the anchor backing plate and matched with the clamping pieces for tensioning; the outer surface of the corrugated pipe is of a spiral corrugated structure, the connecting sleeve is provided with a threaded inner wall and is sealed and screwed at the end part of the corrugated pipe, and the connecting sleeve is fixedly connected with the anchor backing plate and forms a sealing structure at the contact part; the anchor backing plate is a steel pipe section with required wall thickness and outer diameter.

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, 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, the screwing mode 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 anchor backing plate and the connecting sleeves are hermetically connected, so that the leakage into the corrugated pipe when concrete is poured is avoided, 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 concrete structure is hollow is avoided; the connecting sleeve is spirally connected with the corrugated pipe, the connecting sleeve is fixedly connected with the anchor backing plate and sealed, the anchor backing plate, the connecting sleeve, the corrugated pipe, the connecting sleeve and the anchor backing 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 spiral connection can also shorten the connection overlapping length of the connecting sleeve and the corrugated pipe; the anchor backing plate adopts the steel pipe section, and the length cuts as required in other words, and the wall thickness and the external diameter of steel pipe satisfy needs, that is to say the internal diameter of steel pipe satisfies the hole size needs of anchor backing plate, and the wall thickness of steel pipe satisfies the intensity needs of anchor backing plate, certainly through the selection of steel pipe material, can suitably reduce the wall thickness of steel pipe.

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 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 anchor backing plate; generally, the surface of the connecting ring is kept flat, and the end face of the anchor backing plate is kept flat, so that the connecting ring is in contact connection with and fixed on the end face of the anchor backing plate, and the connecting ring can be sealed well.

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 anchor backing plate and is connected with the anchor backing plate through a connecting piece, or a glue pad is arranged between the connecting ring and the anchor backing plate and is connected with the anchor backing 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 length of the threaded hole is smaller than that of the sleeve column, and the threaded hole is formed in the end portion of the sleeve column.

Further preferably, a restraining ring is arranged in the connecting sleeve or the corrugated pipe and hooped outside the inhaul cable. The displacement of the stay cable steel strand in the corrugated pipe is limited by the restraining ring.

Preferably, the anchor backing plate is a flat backing plate, is formed by cutting a steel pipe and machining end faces, and axial connecting holes are formed in the two end faces of the anchor backing plate.

Further preferably, a sinking platform is arranged on one end face of the anchor backing plate, and the outer diameter of the sinking platform is matched with that of the anchor plate. The outer diameter of the anchor plate is matched with the outer diameter of the sinking platform, when the anchor plate supports the anchor plate, the anchor plate is located on the sinking platform, and meanwhile, the sinking platform limits the anchor plate.

Further preferably, the anchor backing plate is provided with grouting holes, the grouting holes are inclined, and one ends of the grouting holes are located on the inner hole wall of the anchor backing plate.

Further preferably, the corrugated pipe and the connecting sleeve are sleeved with spiral ribs, and the spiral outer diameter of each spiral rib is smaller than the maximum outer diameter of the connecting sleeve.

The utility model has the advantages that: 1. the anchor backing plate is a steel pipe section, namely, the steel pipe is cut according to the required length, the wall thickness and the outer diameter of the steel pipe meet the requirements, namely, the inner diameter of the steel pipe meets the size requirement of an inner hole of the anchor backing plate, the wall thickness of the steel pipe meets the strength requirement of the anchor backing plate, and the wall thickness of the steel pipe can be properly reduced by selecting the material of the steel pipe;

2. 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, 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, the screwing mode 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 anchor backing plate and the connecting sleeves are hermetically connected, so that the leakage into the corrugated pipe when concrete is poured is avoided, the corrugated pipe is prevented from being;

3. 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 concrete structure is hollow is avoided;

4. the connecting sleeve is spirally connected with the corrugated pipe, the connecting sleeve is fixedly connected with the anchor backing plate and sealed, the anchor backing plate, the connecting sleeve, the corrugated pipe, the connecting sleeve and the anchor backing plate are combined into a reliable and stable integrated structure, and the interior of the corrugated pipe can be well protected;

5. 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.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a cross-sectional view of an anchor pad of the present invention;

in the figure: 1. the device comprises a protective cover, 2, a clamping piece, 3, an anchor hole, 4, an anchor plate, 5, an anchor backing plate, 6, a connecting sleeve, 7, a connecting ring, 8, a sleeve column, 9, a steel strand, 10, a corrugated pipe, 11, a spiral rib, 12, a sinking platform, 13 and a grouting hole.

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 fig. 1 and fig. 2, a tubular anchor plate anchoring system comprises a corrugated pipe 10 preset in a concrete structure, connecting sleeves 6 connected to two ends of the corrugated pipe in a sealing manner, an anchor plate 5 connected with the connecting sleeves in a sealing manner, a guy cable penetrating through the corrugated pipe, clamping pieces 2 sleeved at the ends of guy cable steel strands 9, and an anchor plate 4 supported by the anchor plate and matched with the clamping pieces for tensioning, wherein spiral ribs 11 are sleeved outside the corrugated pipe, and a sufficient gap is kept between the inner circle of each spiral rib and the outer surface of the corrugated pipe, and the gap is generally controlled to be 15-20 cm. The stay cable used in this embodiment is a parallel steel strand stay cable.

The connecting sleeve is of a T-shaped structure and comprises a sleeve column 8 and a connecting ring 7, the axis of the sleeve column is a threaded hole, the length of the threaded hole is smaller than that of the sleeve column, the threaded hole is formed in the end portion 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.

The steel strand wires tip passes anchor eye 3 and the cover of anchor slab and puts the clamping piece, the clamping piece is in the anchor eye after the stretch-draw, because the distribution area in anchor eye is greater than the cross sectional area of cable, consequently, the steel strand wires tip can open, avoid steel strand wires and adapter sleeve and bellows to take place the friction, unfavorable situations such as interference, the hole size of anchor backing plate is enough, the aperture of the hole of go-between is enough big, the jacket post of adapter sleeve adopts the toper structure, the length of jacket post satisfies the open slope needs of steel strand wires, the jacket post has sufficient screw hole length simultaneously, make jacket post and bellows have sufficient spiral fit length. A restraining ring is arranged in the connecting sleeve or the corrugated pipe, hooped outside the inhaul cable, and the stretching position of the steel strand is limited by the restraining ring.

The anchor backing plate is a flat backing plate and is formed by cutting off a steel pipe and processing end faces, and two end faces of the anchor backing plate are provided with axial connecting holes. The connecting hole of one end is used for connecting the protective cover 1, and the connecting hole of the other end is used for connecting the connecting sleeve. The end face of the anchor backing plate connected with the protective sleeve is provided with a sinking platform 12, and the sinking outer diameter is matched with the outer diameter of the anchor plate. The anchor backing plate is provided with grouting holes 13 which are inclined, and one ends of the grouting holes are positioned on the inner hole wall of the anchor backing plate.

After the steel strand is tensioned, a protective cover is fixed on the anchor backing plate, the protective cover covers the anchor plate, the clamping piece and the end part of the steel strand, and after vacuumizing, grouting is performed into the anchor backing plate through the grouting hole.

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

1. A tubular anchor backing plate anchoring system is characterized by comprising a corrugated pipe (10) which is preset in a concrete structure, connecting sleeves (6) which are connected with two ends of the corrugated pipe in a sealing way, an anchor backing plate (5) which is connected with the connecting sleeves in a sealing way, a guy cable which penetrates through the corrugated pipe, clamping pieces (2) which are sleeved at the end parts of guy cable steel stranded wires (9), and an anchor plate (4) which is supported by the anchor backing plate and matched with the clamping pieces for tensioning; the outer surface of the corrugated pipe is of a spiral corrugated structure, the connecting sleeve is provided with a threaded inner wall and is sealed and screwed at the end part of the corrugated pipe, and the connecting sleeve is fixedly connected with the anchor backing plate and forms a sealing structure at the contact part; the anchor backing plate is a steel pipe section with required wall thickness and outer diameter.

2. A tubular anchor pad anchoring system according to claim 1, wherein the connecting sleeve is of a T-shaped configuration comprising a sleeve post (8) and a connecting ring (7), the sleeve post having a threaded hole therein, the threaded hole being adapted to the thread on the outer surface of the bellows.

3. The tubular anchor pad anchoring system of claim 2, wherein the corrugated pipe is coated with an adhesive layer on the outer surface of the end portion thereof, and the sleeve columns are screwed into the corrugated pipe; the end face of the connecting ring is coated with a glue layer which is contacted with the anchor backing plate and is connected with the anchor backing plate through a connecting piece, or a glue pad is arranged between the connecting ring and the anchor backing plate and is connected with the anchor backing plate through a connecting piece.

4. A tubular anchor pad anchoring system according to claim 2 or 3, wherein the threaded hole has a length less than the length of the casing string, the threaded hole being provided at an end position of the casing string.

5. A tubular tie plate anchoring system according to claim 1, 2 or 3, wherein a restraining ring is provided inside the connecting sleeve or bellows, which is hooped outside the pulling cable.

6. The tubular anchor backing plate anchoring system of claim 1, 2 or 3, wherein the anchor backing plate is a flat backing plate formed by cutting a steel tube and machining end faces, and both end faces of the anchor backing plate are provided with axial connecting holes.

7. A tubular anchor pad anchoring system according to claim 6, wherein a counter sink (12) is provided on one of the end faces of the anchor pad, the counter sink having an outer diameter adapted to the outer diameter of the anchor plate.

8. A tubular anchor pad anchoring system according to claim 6, wherein the anchor pad is provided with grouting holes (13) which are inclined, one end of the grouting holes being located in the inner hole wall of the anchor pad.

9. A tubular anchor pad anchoring system according to claim 1, 2 or 3, wherein the corrugated pipe and the connecting sleeve are externally sleeved with helical ribs (11), the helical outer diameter of the helical ribs being smaller than the maximum outer diameter of the connecting sleeve.