CN211941438U - Post-tensioned prestressed concrete sleeper - Google Patents

Abstract

The utility model relates to a post-tensioning method prestressed concrete sleeper, including the sleeper body, the both ends of sleeper body are equipped with the ground tackle respectively, and one end to the other end of this length direction of sleeper body is equipped with a plurality of tensioning hole along the sleeper, sets up a prestressed reinforcement in every tensioning hole, and all prestressed reinforcement's both ends are anchored respectively on the ground tackle that corresponds, and the end of every prestressed reinforcement is located tensioning hole, and the tip in every tensioning hole is equipped with the concrete structure spare of hole sealing. The post-tensioning prestressed concrete sleeper has the advantages that the post-tensioning prestressed concrete sleeper is applied, prestressed steel bars in each sleeper body formed by pouring are independently tensioned, so that the requirement of a production field is small, the end of each prestressed steel bar tensioned is still located in a tensioning hole easily, after tensioning and anchoring, concrete hole sealing is performed on the tensioning hole, the prestressed steel bars are guaranteed not to be exposed, the corrosion risk source and corrosion speed of the prestressed steel bars are reduced, the durability of the sleeper body is enhanced, and the post-tensioning prestressed concrete sleeper is simple in structure, convenient to produce and good in effect.

Description

Post-tensioned prestressed concrete sleeper

Technical Field

The utility model relates to a track traffic makes the field, especially a post-tensioned method prestressed concrete sleeper.

Background

The production of the existing prestressed concrete sleeper basically adopts a pretensioning method, the production flow of the existing pretensioning method prestressed concrete sleeper is shown in figure 1, prestressed reinforcements 2 are tensioned on a longer working platform, a plurality of sleeper bodies 1 are sequentially poured along the tensioned prestressed reinforcements 2, and the prestressed reinforcements 2 between two adjacent sleeper bodies 1 are sheared after the sleeper bodies 1 are maintained and formed.

Although the method can rapidly produce the sleeper body 1 in batches, the method has the problems of large occupied area, large cost input for producing the sleeper body 1, and low durability of the sleeper body 1 due to the fact that the prestressed reinforcement 2 in the formed sleeper body 1 is exposed outside and is easy to rust in use.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: the post-tensioning prestressed concrete sleeper aims at solving the problems that the production of the concrete sleeper in the prior art occupies large area, the cost investment is large, the prestressed reinforcement in the formed concrete sleeper is exposed outside, and the concrete sleeper is easy to rust in use, so that the durability of the concrete sleeper is low.

In order to realize the purpose, the utility model discloses a technical scheme be:

the utility model provides a post-tensioning method prestressed concrete sleeper, includes the sleeper body, the both ends of sleeper body are equipped with the ground tackle respectively, follow sleeper body length direction's one end is equipped with a plurality of tensioning hole to the other end, every set up a prestressed reinforcement in the tensioning hole, all prestressed reinforcement's both ends anchor respectively in corresponding on the ground tackle, every prestressed reinforcement's end is located tensioning hole is downthehole, every tensioning hole's tip is equipped with the concrete structure spare of hole sealing.

Adopt a post-tensioning method prestressed concrete sleeper, to every pouring shaping in the sleeper body prestressed reinforcement stretch-draw alone, therefore the production place demand is little, also makes easily prestressed reinforcement stretch-draw back end still is located stretch-draw downthehole, stretch-draw anchor back, right the concrete hole sealing is pour to the stretch-draw hole, guarantees prestressed reinforcement does not expose, reduces prestressed reinforcement corrosion risk source and corrosion speed have strengthened the durability that the sleeper body used, this concrete sleeper simple structure, convenient production, respond well.

Preferably, each tensioning hole is internally provided with a sleeve, and the sleeve is provided with the corresponding prestressed reinforcement.

By adopting the structure, when the sleeper body is manufactured by a post-tensioning method, the sleeper body is poured with concrete and reaches certain strength, the sleeve is arranged so that the prestressed reinforcement can be tensioned in the sleeve, and the prestressed reinforcement is in direct contact with the tensioning of the sleeper body, so that the friction force of the prestressed reinforcement tensioning is reduced, the tensioning is convenient to implement, and the damage of the tensioning to the sleeper body is reduced.

Preferably, all the prestressed reinforcements are symmetrically arranged along the vertical axis of the end face of the sleeper body.

Preferably, the diameter of each of the prestressed reinforcements is greater than or equal to 9 mm.

Because the post-tensioning method is to pour the sleeper body first, stretch-draw the prestressed reinforcement again, stretch-draw the prestressed reinforcement to the sleeper body structure has certain influence, adopt this kind of structure, can reduce every the sleeper body is used the quantity of prestressed reinforcement reduces the post-tensioning the prestressed reinforcement is to the adverse effect of sleeper body structure.

Preferably, the anchorage device comprises an anchoring plate and a locking nut, the anchoring plate is embedded in the sleeper body, a thread section is arranged at the end of the prestressed reinforcement, and the thread section is matched with the locking nut.

Preferably, a plurality of stirrups are arranged along the length direction of the sleeper body.

By adopting the structure, the stirrup is used as a framework for pouring concrete, so that the strength of the sleeper body can be enhanced.

Preferably, each of the stirrups is arranged at equal intervals.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the post-tensioning prestressed concrete sleeper of the utility model is applied to independently stretch the prestressed steel bars in each sleeper body which is cast and formed, so that the requirement of a production field is small, the end of the prestressed steel bar after being stretched is still positioned in the stretching hole easily, after being anchored by stretching, a concrete hole sealing is poured in the stretching hole, the prestressed steel bars are ensured not to be exposed, the corrosion risk source and the corrosion speed of the prestressed steel bar are reduced, the durability of the sleeper body is enhanced, and the concrete sleeper is simple in structure, convenient to produce and good in effect;

2. by applying the post-tensioning method prestressed concrete sleeper, when the sleeper body is manufactured by the post-tensioning method, the sleeper body is already poured with concrete and reaches certain strength, the sleeve is arranged so that the prestressed reinforcement can be tensioned in the sleeve, and compared with the tensioning of the prestressed reinforcement in direct contact with the sleeper body, the friction force of the prestressed reinforcement tensioning is reduced, the tensioning is convenient to implement and the damage of the tensioning to the sleeper body is reduced;

3. by applying the post-tensioning prestressed concrete sleeper of the utility model, the diameter of each prestressed reinforcement is more than or equal to 9mm, and because the post-tensioning method is to pour the sleeper body firstly and then stretch the prestressed reinforcement, and stretch the prestressed reinforcement has certain influence on the sleeper body structure, by adopting the structure, the number of the prestressed reinforcement used by each sleeper body can be reduced, and the adverse effect of post-tensioning the prestressed reinforcement on the sleeper body structure is reduced;

4. application a post-tensioned prestressed concrete sleeper, follow sleeper body length direction is equipped with a plurality of stirrup, adopts this kind of structure, with the stirrup can strengthen for concreting's skeleton the intensity of sleeper body.

Drawings

FIG. 1 is a schematic diagram of the production of a prior art pretensioned prestressed concrete sleeper;

fig. 2 is a schematic elevation view of a post-tensioned prestressed concrete sleeper according to the present invention;

fig. 3 is a schematic plan view of a post-tensioned prestressed concrete sleeper according to the present invention;

FIG. 4 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 5 is a schematic view of the construction of the anchor;

FIG. 6 is an enlarged view of a portion B of FIG. 2;

fig. 7 is a schematic view of the tensioned hole in fig. 6 after sealing.

The labels in the figure are: 1-sleeper body, 2-prestressed reinforcement, 3-anchorage device and 4-tensioning hole.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Examples

As shown in fig. 2-7, the utility model discloses a post-tensioned prestressed concrete sleeper, which comprises a sleeper body 1.

The both ends of sleeper body 1 are equipped with ground tackle 3 respectively, follow 1 length direction's of sleeper body one end to the other end is equipped with a plurality of stretch-draw hole 4, every set up a sleeve pipe in the stretch-draw hole 4, every set up a prestressing steel 2, every prestressing steel 2's diameter is more than or equal to 9mm, all prestressing steel 2 follows the vertical axis symmetry of 1 terminal surface of sleeper body sets up, follows 1 length direction of sleeper body is equipped with a plurality of stirrup, every the stirrup equidistant setting, with the stirrup can strengthen for the skeleton of concreting the intensity of sleeper body 1.

The two ends of each prestressed reinforcement 2 are anchored on the corresponding anchor 3 respectively, each anchor 3 comprises an anchoring plate and a locking nut, the anchoring plates are embedded in the sleeper body 1, the end portions of the prestressed reinforcements 2 are provided with thread sections, the thread sections are matched with the locking nuts, the end of each prestressed reinforcement 2 is located in the tensioning hole 4, and the end portion of each tensioning hole 4 is provided with a concrete structural member for sealing the hole.

The post-tensioning prestressed concrete sleeper of the utility model is applied to independently tension the prestressed steel bars 2 in the sleeper body 1 formed by casting, so that the requirement of a production field is small, the tensioned end of the prestressed steel bars 2 is still positioned in the tensioning hole 4 easily, after tensioning and anchoring, the tensioning hole 4 is sealed by pouring concrete, the prestressed steel bars 2 are ensured not to be exposed, the corrosion risk source and the corrosion speed of the prestressed steel bars 2 are reduced, the durability of the sleeper body 1 is enhanced, when the sleeper body 1 is manufactured by the post-tensioning method, the sleeper body 1 is already poured with concrete and reaches certain strength, the sleeve is arranged to ensure that the tensioning of the prestressed steel bars 2 is carried out in the sleeve, and relatively, the prestressed steel bars 2 are in direct contact with the tensioning of the sleeper body 1, reduced the frictional force of 2 stretch-draws of prestressed reinforcement, it is right to be convenient for stretch-draw implement and reduce stretch-draw sleeper body 1's harm, because the post-tensioning method is pour earlier sleeper body 1, stretch-draw again prestressed reinforcement 2, stretch-draw prestressed reinforcement 2 is right sleeper body 1 structure has certain influence, adopts prestressed reinforcement 2's diameter is greater than or equal to 9mm, can reduce every sleeper body 1 is used prestressed reinforcement 2's quantity reduces the post-tensioning and draws prestressed reinforcement 2 is right the harmful effects of sleeper body 1 structure, this concrete sleeper simple structure, and production is convenient, and is respond well.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. The utility model provides a post-tensioning method prestressed concrete sleeper, includes sleeper body (1), its characterized in that, the both ends of sleeper body (1) are equipped with ground tackle (3) respectively, follow sleeper body (1) length direction's one end is equipped with a plurality of tensioning hole (4) to the other end, every set up one prestressed reinforcement (2), all in tensioning hole (4) the both ends of prestressed reinforcement (2) are anchored respectively in corresponding on ground tackle (3), every the end of prestressed reinforcement (2) is located in tensioning hole (4), every the tip of tensioning hole (4) is equipped with the concrete structure spare of hole sealing.

2. Post-tensioned prestressed concrete sleeper according to claim 1, characterized in that a sleeve is provided in each of said tensioning holes (4), said sleeve being provided with the corresponding said prestressed reinforcement (2).

3. Post-tensioned prestressed concrete sleeper according to claim 1, characterized in that all the prestressed reinforcement bars (2) are arranged symmetrically along the vertical axis of the end face of the sleeper body (1).

4. Post-tensioned prestressed concrete sleeper according to claim 1, characterized in that each of said prestressed reinforcement bars (2) has a diameter greater than or equal to 9 mm.

5. Post-tensioned prestressed concrete sleeper according to claim 1, characterized in that said anchorage means (3) comprise an anchoring plate and a locking nut, said anchoring plate being embedded in said sleeper body (1), the end of said prestressed reinforcement (2) being provided with a threaded section adapted to said locking nut.

6. Post-tensioned prestressed concrete sleeper according to any one of claims 1-5, characterized in that several stirrups are provided along the length of said sleeper body (1).

7. The post-tensioned prestressed concrete sleeper as claimed in claim 6, wherein each of said stirrups is disposed at equal intervals.

Images