CN214656271U - Tie bar structure for arch bridge arch support - Google Patents

Abstract

The utility model provides a tie rod structure for arch bridge hunch seat for the hunch seat, including a plurality of tie rod that passes the hunch seat, wherein, the tie rod includes the cable body and cup joints the pre-buried pipe on the cable body, and wherein, the cable body includes the outer jacket and pegs graft in a plurality of steel strand wires in the outer jacket, and steel strand wires expose the section periphery and are equipped with the anchor structure including stretching out the section that exposes of outer jacket. The problem of the steel strand damage that causes of drawing repeatedly is solved. The utility model discloses a setting of arch bridge is tie rod structure for hunch bridge hunch seat through the anchor structure cooperates in tensioning equipment, has realized disposable anchor, has reduced the stretch-draw number of times of tie rod structure, has reduced the clastic peeling off of the damage of steel strand wires, epoxy coating and steel strand wires, helps protecting the steel strand wires.

Description

Tie bar structure for arch bridge arch support

Technical Field

The utility model belongs to the technical field of the anchor structure, concretely relates to arch bridge is tie rod structure for hunch seat.

Background

The tied arch bridge combines two basic structural forms of an arch and a beam together to bear load together, the structural performance and the combination effect of bending and arch compression of the beam are fully exerted, and the horizontal thrust of an arch end is borne by a pull rod, so that the arch end support does not generate horizontal thrust.

In recent years, the unbonded in vitro prestressing technique has been widely used in China. The core of the steel wire is a prestressed steel strand coated with an epoxy coating on a monofilament, and epoxy resin powder is sprayed on the steel strand by a high-voltage electrostatic spraying method, and then heated, melted, solidified and cooled, so that a layer of compact epoxy coating is formed on the surface of the steel wire. Because the material is special, must adopt the suspension tension technology to reduce the damage that causes steel strand wires and clamping piece, reduce prestressing force loss, improve construction quality.

In order to solve the problem of suspension tensioning, a tie bar structure used in combination with the suspension tensioning needs to be provided to reduce the damage of the steel strand.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an arch bridge is tie rod structure for hunch seat has solved the problem that stretch-draw caused the steel strand wires damage repeatedly.

The utility model discloses the technical scheme who adopts does:

a tie bar structure for an arch bridge arch support is used for the arch support and comprises a plurality of tie bars penetrating through the arch support, wherein each tie bar comprises a cable body and a pre-buried pipe sleeved on the cable body, each cable body comprises an outer protection layer and a plurality of steel strands inserted into the outer protection layer, each steel strand comprises an exposed section extending out of the outer protection layer, and an anchoring structure is arranged on the periphery of the exposed section.

This tied rod structure for arched bridge hunch seat cooperates tensioning equipment through the setting of anchor structure, has realized disposable anchor, has reduced the stretch-draw number of times of tied rod structure, has reduced the damage of steel strand wires, the spalling of epoxy coating and the clastic strip of steel strand wires, helps protecting the steel strand wires.

Optionally, both ends of the cable body extend to the outside of the arch support respectively, wherein one end of the cable body is sleeved with the vibration damping block, and the other end of the cable body is sleeved with the anchor backing plate.

Optionally, the embedded pipe comprises a first embedded pipe abutting against the anchor backing plate and a second embedded pipe extending out of the arch support, wherein the vibration reduction block is located between the cable body and the second embedded pipe.

Optionally, the first embedded pipe is externally provided with a spiral rib.

Optionally, the cable body is sleeved with a heat-shrinkable sleeve, and the second embedded pipe is inserted on the heat-shrinkable sleeve.

Optionally, the anchoring structure comprises a barrel part and a mortar layer filled in the barrel part;

the barrel body part comprises a connecting barrel and a supporting barrel, wherein one end of the supporting barrel is a connecting end sleeved on the connecting barrel, and the other end of the supporting barrel penetrates through the anchor backing plate and extends to an exposed end outside the arch support;

correspondingly, the outer jacket partially extends into the connecting cylinder, the exposed section extends out of the supporting cylinder from the connecting cylinder, and the outer periphery of the outer jacket is provided with a sealing device so as to be connected with the outer jacket and the connecting cylinder.

Optionally, the anchoring structure further comprises an anchor plate positioned at the exposed end of the supporting cylinder, and the anchor plate blocks the exposed end;

the outer side of the anchor plate is also provided with a locking device, and the exposed section penetrates through the anchor plate and the locking device.

Optionally, the anti-loosening device comprises an anti-loosening plate and a plurality of anti-loosening sleeves positioned on the anti-loosening plate, wherein the anti-loosening sleeves are arranged in one-to-one correspondence with the steel strands;

be equipped with on the anchor slab and prevent the pine hole, and locking hole from outer to interior slope setting inwards gradually, locking cover plug-in connects in preventing the pine hole and connects in preventing the pine hole through interference fit.

Optionally, a protective cover is arranged at the exposed end of the supporting barrel, and the protective cover is filled with an anticorrosive material.

Optionally, the arch support is provided with a plurality of tie rod holes, wherein the number of tie rod holes is larger than or equal to the number of tie rods, and redundant tie rod holes are used for replacing the cable body.

The utility model has the advantages that:

this tied rod structure for arched bridge hunch seat cooperates tensioning equipment through the setting of anchor structure, has realized disposable anchor, has reduced the stretch-draw number of times of tied rod structure, has reduced the damage of steel strand wires, the spalling of epoxy coating and the clastic strip of steel strand wires, helps protecting the steel strand wires. Meanwhile, the effects of reducing the prestress loss and improving the construction quality are achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of a tie bar structure for an arch abutment of the arch bridge;

FIG. 2 is a schematic view of the structure of the sealing device;

fig. 3 is a schematic structural view of the anti-loosening device.

In the figure: 1. an arch support; 2. a cable body; 21. an outer jacket; 22. steel strand wires; 3. pre-burying a pipe; 31. a first pre-buried pipe; 32. a second pre-buried pipe; 4. vibrating the block; 5. an anchor backing plate; 6. a spiral rib; 7. thermal shrinkage sleeving; 8. a barrel portion; 81. a connecting cylinder; 82. a support cylinder; 9. a mortar layer; 10. a sealing device; 101. an elastic ring; 102. a snap ring; 11. an anchor plate; 12. a locking device; 121. an anti-loosening plate; 122. an anti-loose sleeve; 13. a protective cover; 14. and (3) an anticorrosive material.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the embodiments and the features of the embodiments may be combined with each other without conflict.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which the products of the present invention are conventionally placed in use, or the position or positional relationship which the skilled person conventionally understand, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element to which the reference is made must have a specific position, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to fig. 3, the tie bar structure for an arch bridge arch support of the present embodiment is used for an arch support 1, and includes a plurality of tie bars penetrating through the arch support 1, where the tie bars include a cable body 2 and a pre-embedded pipe 3 sleeved on the cable body 2, where the cable body 2 includes an outer protective layer 21 and a plurality of steel strands 22 inserted into the outer protective layer 21, the steel strands 22 include an exposed section extending out of the outer protective layer 21, and an anchoring structure is disposed on the periphery of the exposed section.

In view of the characteristics of the non-adhesive external prestress technology, when the common tensioning technology is adopted to tension the steel strand 22, multiple times of tensioning is needed to realize anchoring, and the steel strand 22 is damaged in the repeated tensioning process, so that the epoxy coating is peeled off, or the scraps of the steel strand 22 are filled in the gap, so that the anchoring quality is influenced, and the suspension type tensioning technology is adopted to realize one-time anchoring, thereby reducing the tensioning times.

The utility model provides a cooperate tie rod structure that floated stretch-draw technique used, wherein, be equipped with the tie rod hole that suits with the tie rod on the hunch seat 1 to the tie rod is connected in hunch seat 1. For the tie rod, the cable body 2 is positioned in the embedded pipe 3, and the embedded pipe 3 is beneficial to forming a tie rod hole on one hand and is also beneficial to isolating the cable body 2 from the arch support 1 on the other hand, so that the cable body 2 is prevented from being damaged in the tensioning process.

For the cable body 2, the outer sheath 21 functions similarly to the embedded pipe 3, thereby performing a secondary protection function. The exposed sections of the steel strands 22 are provided for tensioning equipment, so that tensioning efficiency and tensioning effect are improved. The anchoring structure connected to the exposed section is matched with the tensioning equipment for use and is used as a fulcrum of the tensioning equipment, so that the tensioning equipment can work conveniently, and one-time tensioning in place is facilitated.

And calculating the length of the outer protective layer 21 to be stripped according to the design length of the tie rod cable and the installation size of the anchorage device, thereby forming an exposed section and avoiding the leakage of the cable body 2 caused by multi-stripping. Optionally, the peeling length is 65cm, as an option. After peeling, the grease on the surface of the steel strand 22 is cleaned, so that the bond strength is increased and the construction is facilitated.

This tied rod structure for arched bridge hunch seat cooperates tensioning equipment through the setting of anchor structure, has realized disposable anchor, has reduced the stretch-draw number of times of tied rod structure, has reduced the damage of steel strand wires 22, the peeling off of epoxy coating and the peeling off of steel strand wires 22 piece, helps protecting steel strand wires 22. Meanwhile, the effects of reducing the prestress loss and improving the construction quality are achieved.

The utility model provides an among the concrete implementation mode, as an option, the both ends of the cable body 2 extend to outside the hunch seat 1 respectively, wherein, 2 one ends of the cable body have cup jointed the damping piece, and 2 other ends of the cable body have cup jointed anchor backing plate 5. The vibration damping block absorbs the vibration from the abutment 1, thereby avoiding stress concentration on the cable body 2, and improving the service life of the cable body 2. The strength of the anchor backing plate 5 meets the requirement of compressive stress during prestress tensioning construction, and meanwhile, the anchor backing plate is matched with tensioning equipment, so that suspension tensioning is facilitated.

In the specific embodiment provided by the utility model, as an option, buried pipe 3 includes the first buried pipe 31 of butt in anchor backing plate 5 and extends to the second buried pipe 32 outside the hunch seat 1, and wherein, the damping piece is located between cable body 2 and the second buried pipe 32. As shown in fig. 1, a part of the cable body 2 in the arch center 1 is arc-shaped, so as to fit the radian of the cable body 2, the first embedded pipe 31 is sleeved on the relatively vertical part of the cable body 2, and the radian of the second embedded pipe 32 is adapted to the radian of the cable body 2 and sleeved on the part.

The end of the second embedded pipe 32 is provided with an arc transition section to connect the first embedded pipe 31 and the second embedded pipe 32, specifically, the arc transition section is connected to the first embedded pipe 31 by welding.

In the specific embodiment provided by the present invention, as an option, the first pre-buried pipe 31 is provided with a spiral rib 6 outside. Therefore, the stability is improved, the firmness and reliability are realized, and the bearing capacity is improved.

Optionally, spiral muscle 6 chooses for use circular spiral muscle 6 or square spiral muscle 6 all is within the utility model discloses a within the scope of protection.

In the specific embodiment provided by the utility model, as an option, the thermal shrinkable sleeve 7 has been cup jointed on the cable body 2, and the second pre-buried pipe 32 is pegged graft on thermal shrinkable sleeve 7. As shown in fig. 1, a portion of the damper block is inserted into the second buried pipe 32, and another portion of the damper block extends outward and is exposed. And a part of the thermal shrinkable sleeve 7 is sleeved on the cable body 2, the other part of the thermal shrinkable sleeve 7 extends to the second embedded pipe 32 along the vibration damping block and is sleeved on the second embedded pipe 32, and meanwhile, the gap between the thermal shrinkable sleeve 7 and the second embedded pipe 32 is eliminated by the elasticity of the thermal shrinkable sleeve 7.

In the specific embodiment provided by the present invention, the anchoring structure comprises a cylindrical body 8 and a mortar layer 9 filled in the cylindrical body 8; the barrel part 8 comprises a connecting barrel 81 and a supporting barrel 82, wherein one end of the supporting barrel 82 is a connecting end sleeved on the connecting barrel 81, and the other end of the supporting barrel 82 penetrates through the anchor backing plate 5 and extends to an exposed end outside the arch support 1.

For the anchoring arrangement, as shown in fig. 1, the barrel portion 8 is located within the first pre-buried pipe 31 and passes through the anchor pad 5 so as to extend outside the abutment 1. Specifically, the cylindrical body 8 includes a connecting cylinder 81 on the inner side and a supporting cylinder 82 on the outer side, the connecting cylinder 81 is connected to the cable body 2, and the supporting cylinder 82 is extended out of the abutment 1 so as to be used in cooperation with the tension device.

The mortar layer 9 is formed after the slurry is solidified, the mortar layer 9 plays a role in corrosion prevention for the steel strand 22, the wrapping force generated on the cable body 2 can bear partial dynamic load of the cable body 2, the grouting hole and the exhaust hole are sealed after grouting, and redundant mortar is removed completely. Optionally, the mortar layer 9 is configured as epoxy mortar or other suitable type of mortar, which the present invention is not limited in this respect.

The connection and cooperation of the anchoring structure and the cable body 2 will be described with reference to the structure of the cable body 2, wherein a portion of the outer sheath 21 extends into the connecting cylinder 81, the exposed section extends out of the supporting cylinder 82 from the connecting cylinder 81, and a sealing device 10 is disposed on the outer periphery of the outer sheath 21 to connect the outer sheath 21 and the connecting cylinder 81.

For the sealing device 10, the sealing device 10 comprises an elastic ring 101 and a snap ring 102, wherein the outer side of the elastic ring 101 abuts against the connecting cylinder 81, the inner side of the elastic ring 101 is obliquely arranged, a snap ring 102 groove is formed by an inclined surface and the outer end surface of the cable body 2, and the snap ring 102 is inserted into the snap ring 102 groove; one end of the snap ring 102 is inserted into the groove of the snap ring 102, and the other end of the snap ring 102 is provided with a handle.

Since the gap between the connecting cylinder 81 and the cable 2 is determined, the snap ring 102 pushes the elastic ring 101 to slide along the gap, so as to increase the deformation of the elastic ring 101, and further achieve the purpose of blocking the gap. The arrangement of the handle increases the fulcrum for applying acting force, which is beneficial to improving the pushing efficiency.

Alternatively, the snap ring 102 groove may be disposed on the inner side of the elastic ring 101, or may be disposed on the outer side of the elastic ring 101.

In one possible design, the handle may be configured in any suitable shape, and the present invention is not limited in this respect.

In the embodiment provided by the present invention, as an option, the anchoring structure further includes an anchor plate 11 located at the exposed end of the supporting cylinder 82, and the exposed end is blocked by the anchor plate 11; the outer side of the anchor plate 11 is also provided with a locking device 12, and the exposed section penetrates through the anchor plate 11 and the locking device 12. Due to the poor plasticity of the mortar layer 9, the anchor plate 11 is arranged to cooperate with the tensioning equipment, thereby prolonging the service life of the mortar layer 9.

The anchor plate 11 is connected to the supporting cylinder 82 by welding, bolting or other suitable connection means, so that the supporting cylinder 82 is blocked and mortar is prevented from leaking. Meanwhile, the anti-loosening device 12 is arranged to strengthen the stability of connection between the anchor plate 11 and the supporting cylinder 82 and improve the stability of connection.

In one possible design, the anti-loosening device 12 comprises an anti-loosening plate 121 and a plurality of anti-loosening sleeves 122 positioned on the anti-loosening plate 121, wherein the anti-loosening sleeves 122 are arranged in one-to-one correspondence with the steel strands 22; be equipped with on the anchor slab 11 and prevent the pine hole, and locking hole inwards slope setting gradually from outer to inner, prevent that loose sleeve 122 pegs graft to in locking hole and connect in preventing the pine hole through interference fit.

For the steel strand 22, as shown in fig. 3, the anti-loosening sleeve 122 is placed in the anti-loosening hole, and the steel strand 22 passes through the anti-loosening sleeve 122 to extend to the outside.

Explaining the use of the anti-loosening device 12, the anchor plate 11 is provided with anti-loosening holes, when the anti-loosening plate 121 abuts against the anchor plate 11, the anti-loosening sleeves 122 are inserted into the corresponding anti-loosening holes, and because the anti-loosening holes are gradually inclined inwards from outside to inside, the anti-loosening sleeves 122 gradually deform along with the increase of the depth of the anti-loosening sleeves 122 inserted into the anti-loosening holes, and then the anti-loosening plate 121 is connected to the anchor plate 11.

In the embodiment provided by the present invention, as an option, the exposed end of the supporting cylinder 82 is provided with a protective cover 13, and the protective cover 13 is filled with an anti-corrosion material 14. Optionally, the open end of the protective cover 13 is attached to the anchor pad 5 or the abutment 1. The corrosion-resistant material 14 is made of corrosion-resistant grease or other suitable corrosion-resistant medium, which is not limited in this disclosure.

In the specific embodiment provided by the utility model, as an option, be equipped with a plurality of tie rod hole on the hunch seat 1, wherein, the quantity more than or equal to the quantity of tie rod in tie rod hole, unnecessary tie rod hole is used for changing cable body 2.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims (6)

1. A tie bar structure for an arch bridge abutment is used for an abutment (1), and is characterized in that: the cable comprises a plurality of tie bars penetrating through an arch support (1), wherein each tie bar comprises a cable body (2) and a pre-embedded pipe (3) sleeved on the cable body (2), the cable body (2) comprises an outer protective layer (21) and a plurality of steel stranded wires (22) inserted in the outer protective layer (21), each steel stranded wire (22) comprises an exposed section extending out of the outer protective layer (21), and an anchoring structure is arranged on the periphery of the exposed section;

two ends of the cable body (2) respectively extend out of the arch support (1), wherein one end of the cable body (2) is sleeved with a vibration reduction block, and the other end of the cable body (2) is sleeved with an anchor backing plate (5);

the anchoring structure comprises a barrel part (8) and a mortar layer (9) filled in the barrel part (8);

the barrel body part (8) comprises a connecting barrel (81) and a supporting barrel (82), wherein one end of the supporting barrel (82) is a connecting end sleeved on the connecting barrel (81), and the other end of the supporting barrel (82) penetrates through the anchor backing plate (5) and extends to an exposed end outside the arch support (1);

correspondingly, part of the outer protective layer (21) extends into the connecting cylinder (81), the exposed section extends out of the supporting cylinder (82) from the connecting cylinder (81), and a sealing device (10) is arranged on the periphery of the outer protective layer (21) to connect the outer protective layer (21) and the connecting cylinder (81);

the anchoring structure also comprises an anchor plate (11) positioned at the exposed end of the supporting cylinder (82), and the exposed end is blocked by the anchor plate (11);

the outer side of the anchor plate (11) is also provided with a locking device (12), and the exposed section passes through the anchor plate (11) and the locking device (12);

the anti-loosening device (12) comprises an anti-loosening plate (121) and a plurality of anti-loosening sleeves (122) positioned on the anti-loosening plate (121), wherein the anti-loosening sleeves (122) are arranged in one-to-one correspondence with the steel strands (22);

be equipped with on anchor slab (11) and prevent the pine hole, and locking hole inwards slope setting gradually from outer to interior, in locking cover (122) is pegged graft to locking hole and is connected in preventing the pine hole through interference fit.

2. The tie bar structure for an arch bridge abutment according to claim 1, wherein: the embedded pipe (3) comprises a first embedded pipe (31) abutting against the anchor backing plate (5) and a second embedded pipe (32) extending out of the arch center (1), wherein the vibration reduction block is located between the cable body (2) and the second embedded pipe (32).

3. The tie bar structure for an arch bridge abutment according to claim 2, wherein: the outer side of the first embedded pipe (31) is provided with a spiral rib (6).

4. The tie bar structure for an arch bridge abutment according to claim 2, wherein: the cable body (2) is sleeved with a heat shrinkable sleeve (7), and the second embedded pipe (32) is inserted on the heat shrinkable sleeve (7).

5. The tie bar structure for an arch bridge abutment according to claim 1, wherein: a protective cover (13) is arranged at the exposed end of the supporting cylinder (82), and an anti-corrosion material (14) is filled in the protective cover (13).

6. A tie bar structure for an arch bridge abutment according to any one of claims 1 to 5, wherein: the arch center (1) is provided with a plurality of tie rod holes, wherein the number of the tie rod holes is more than or equal to that of the tie rods, and the redundant tie rod holes are used for replacing the cable body (2).

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