CN110804941B

CN110804941B - Stay cable stretching anchoring anti-retraction device

Info

Publication number: CN110804941B
Application number: CN201911138856.4A
Authority: CN
Inventors: 蒋忠海; 郑月云; 任颖仪; 周亮兵
Original assignee: Foshan University
Current assignee: Foshan University
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2021-09-24
Anticipated expiration: 2039-11-20
Also published as: CN110804941A

Abstract

The invention discloses a stay cable tensioning anchoring anti-retraction device, and relates to the technical field of bridge construction. The steel strand positioning device comprises a base and steel strands, wherein a limiting groove is formed in the upper surface of the base, a buffering groove is formed in the lower surface of the base, a through hole is formed in the bottom of the limiting groove, the lower end port of the through hole is communicated with the inside of the buffering groove, one end of each steel strand penetrates through the through hole and extends to the inside of the buffering groove, a sleeve seat is sleeved on the peripheral side of each steel strand, and four arc-shaped elastic plates are uniformly and fixedly connected to the inner wall of the limiting groove. According to the invention, through the design of the limiting concave groove, the buffering concave groove, the sleeve seat, the arc-shaped elastic plate, the limiting spring and the buffering spring, the buffering spring on the disc at the other end of the steel strand is tightly pressed on the top of the buffering concave groove, and meanwhile, the sleeve seat is fixed by the cooperation of the arc-shaped elastic plate and the limiting spring, so that the steel strand is in a tight state, the retraction amount of the steel strand is greatly reduced, the structure is simple, the use is convenient, and the prestress loss of the steel strand can be effectively reduced.

Description

Stay cable stretching anchoring anti-retraction device

Technical Field

The invention belongs to the technical field of bridge construction, and particularly relates to a stay cable tensioning anchoring anti-retraction device.

Background

The cable-stayed bridge is one of the most popular bridge types of the large-span bridge due to the characteristics of small height of a main beam, large spanning capability, beautiful shape and the like. In the prior art, a cable-stayed bridge is usually constructed with a cable tower in the middle, and symmetric stay cables are arranged on two sides of the cable tower, and main beams of the cable tower are connected together through stay cables. The common anchoring forms of the guy cable and the steel box girder mainly comprise: anchor box type connection, ear plate type connection, anchor tube type connection and anchor pulling plate connection.

In order to improve the span of the cable-stayed bridge, increase the integral rigidity of the bridge and improve the stability of the middle tower of the multi-tower cable-stayed bridge, a partial cross cable-stayed bridge is provided. The retraction of the steel strand in the prestress tensioning process can cause the loss of prestress applied to the cable tower, and the larger the retraction amount of the steel strand is, the more the loss of the prestress is. Therefore, how to reduce the retraction amount of the steel strand and thus reduce the prestress loss of the cable tower is a difficult problem in the tensioning process of the steel strand.

Disclosure of Invention

The invention provides the stay cable tensioning anchoring anti-retraction device which is simple and reliable in structure, convenient to use and capable of effectively reducing prestress loss through the design of the limiting groove, the buffering groove, the sleeve seat, the arc-shaped elastic plate, the limiting spring, the limiting disc and the buffering spring.

In order to solve the technical problems, the invention is realized by the following technical scheme:

the invention relates to a stay cable tensioning anchoring anti-retraction device, which comprises a base and a steel strand; spacing in a wretched state has been seted up to the base upper surface, buffering in a wretched state has been seted up to the base lower surface, the through-hole has been seted up to spacing in a wretched state bottom, the port is linked together with buffering in a wretched state inside under the through-hole, steel strand wires one end runs through the through-hole and extends to buffering in a wretched state inside, the side cover all around of steel strand wires is equipped with the cover seat, the cover seat is located spacing in a wretched state bottom, four arc elastic plates of the even fixedly connected with of spacing in a wretched state inner wall, the side contact all around of arc elastic plate outer wall and cover seat.

Furthermore, four limiting springs are uniformly and fixedly connected to the inner wall of the limiting groove, and one ends of the limiting springs are fixedly connected with the inner wall of the arc-shaped elastic plate.

Furthermore, a fastening bolt penetrates through the surface of the arc-shaped elastic plate through threads, positioning holes are uniformly formed in the peripheral side face of the sleeve seat, and one end of the fastening bolt is matched with the inner wall of each positioning hole.

Furthermore, the top of the limiting groove is fixedly connected with a limiting disc, and the top of the arc-shaped elastic plate is in contact with the lower surface of the limiting disc.

Furthermore, one end of the steel strand, which is located inside the buffering groove, is fixedly connected with a disc, the upper surface of the disc is fixedly connected with a buffering spring, the buffering spring is sleeved on the peripheral side surface of the steel strand, and one end of the buffering spring is fixedly connected with the top of the buffering groove.

Furthermore, four sides of the base are fixedly connected with ear plates, and ground nails penetrate through one surface of each ear plate.

The invention has the following beneficial effects: according to the invention, through the design of the limiting groove, the buffering groove, the sleeve seat, the arc-shaped elastic plate, the limiting spring, the limiting disc and the buffering spring, one end of the steel strand sequentially passes through the buffering groove, the through hole, the sleeve seat and the limiting groove, so that the disc at the other end of the steel strand is positioned in the buffering groove, then the base is fixedly arranged on the horizontal or inclined ground through the ground nail on the lug plate, one end of the steel strand is fixedly connected to the cable tower, the buffering spring on the disc at the other end of the steel strand is tightly pressed on the top of the buffering groove, and meanwhile, the sleeve seat is fixed by the matching of the arc-shaped elastic plate and the limiting spring, so that the steel strand is in a tight state, the retraction amount of the steel strand is greatly reduced, the structure is simple, the use is convenient, and the prestress loss of the steel strand can be effectively reduced.

Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic structural view of a stay cable tension anchoring anti-retraction device;

FIG. 2 is a schematic view of the bottom view of FIG. 1;

FIG. 3 is a top view of the structure of FIG. 1;

FIG. 4 is a front view of the structure of FIG. 1;

FIG. 5 is a schematic view of the interior of the base;

in the drawings, the components represented by the respective reference numerals are listed below:

1-base, 2-steel strand, 101-limiting groove, 102-buffering groove, 103-through hole, 104-sleeve seat, 105-arc elastic plate, 106-limiting spring, 107-fastening bolt, 108-limiting disc, 109-lug plate, 110-ground nail, 201-disc and 202-buffering spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, the present invention is a stay cable tension anchoring anti-retraction device, which comprises a base 1 and a steel strand 2; spacing concave in a wretched state 101 has been seted up to base 1 upper surface, buffering concave in a wretched state 102 has been seted up to base 1 lower surface, through-hole 103 has been seted up to spacing concave in a wretched state 101 bottom, the port is linked together with buffering concave in a wretched state 102 is inside under through-

hole

103, 2 one end of steel strand wires run through-hole 103 and extend to buffering concave in a wretched state 102 inside, 2 side covers all around of steel strand wires are equipped with cover seat 104, cover seat 104 is located spacing concave in a wretched state 101 bottom, and cover seat 104 bottom and spacing concave in a wretched state 101 bottom sliding connection, four arc elastic plates 105 of the even fixedly connected with of spacing concave in a wretched state 101 inner wall, arc elastic plate 105 outer wall and cover seat 104 side face contact all around.

As shown in fig. 1 and fig. 3, four limiting springs 106 are uniformly and fixedly connected to the inner wall of the limiting groove 101, and one end of each limiting spring 106 is fixedly connected to the inner wall of the arc-shaped elastic plate 105.

As shown in fig. 3 and 5, fastening bolts 107 are threaded through one surface of the arc-shaped elastic plate 105, positioning holes are uniformly formed on the peripheral surface, and one end of each fastening bolt 107 is matched with the inner wall of each positioning hole to fixedly mount the sleeve base 104 on the arc-shaped elastic plate 105.

As shown in fig. 3 and 5, a limiting disc 108 is fixedly connected to the top of the limiting groove 101, the top of the arc-shaped elastic plate 105 contacts with the lower surface of the limiting disc 108, and the limiting disc 108 prevents the arc-shaped elastic plate 105 from moving upwards.

As shown in fig. 5, a disc 201 is fixedly connected to one end of the steel strand 2 located inside the buffer groove 102, a buffer spring 202 is fixedly connected to the upper surface of the disc 201, the buffer spring 202 is sleeved on the peripheral side surface of the steel strand 2, and one end of the buffer spring 202 is fixedly connected to the inner top of the buffer groove 102.

As shown in fig. 1, four side surfaces of the base 1 are fixedly connected with ear plates 109, and ground nails 110 penetrate through one surface of the ear plates 109.

The working principle of the embodiment is as follows: during the use, pass buffering concave tank 102 with steel strand wires 2 one end in proper order, through-hole 103, cover seat 104, spacing concave tank 101, make the disc 201 of the steel strand wires 2 other end be located inside buffering concave tank 102, then through ground nail 110 on otic placode 109 with base 1 fixed mounting on level or inclined subaerial, with steel strand wires 2 one end fixed connection on the cable tower, buffer spring 202 on the disc 201 of the steel strand wires 2 other end closely presses at buffering concave tank 102 top, cover seat 104 is fixed in the cooperation of arc elastic plate 105 and spacing spring 106 simultaneously, make steel strand wires 2 be in the tight state, greatly reduced the volume of contracting of steel strand wires 2, moreover, the steam generator is simple in structure, high durability and convenient use can effectively reduce the prestressing force loss of steel strand wires 2.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A stay cable stretching anchoring anti-retraction device comprises a base (1) and a steel strand (2); the method is characterized in that: the upper surface of the base (1) is provided with a limiting groove (101), the lower surface of the base (1) is provided with a buffering groove (102), the bottom of the limiting groove (101) is provided with a through hole (103), the lower port of the through hole (103) is communicated with the inside of the buffering groove (102), one end of the steel strand (2) penetrates through the through hole (103) and extends to the inside of the buffering groove (102), the peripheral side of the steel strand (2) is sleeved with a sleeve seat (104), the sleeve seat (104) is positioned at the bottom of the limiting groove (101), the inner wall of the limiting groove (101) is uniformly and fixedly connected with four arc-shaped elastic plates (105), and the outer wall of each arc-shaped elastic plate (105) is in contact with the peripheral side of the sleeve seat (104);

the inner wall of the limiting groove (101) is uniformly and fixedly connected with four limiting springs (106), and one end of each limiting spring (106) is fixedly connected with the inner wall of the arc-shaped elastic plate (105);

fastening bolts (107) penetrate through threads on one surface of the arc-shaped elastic plate (105), positioning holes are uniformly formed in the peripheral side surface of the sleeve seat (104), and one ends of the fastening bolts (107) are matched with the inner walls of the positioning holes;

the top of the limiting groove (101) is fixedly connected with a limiting disc (108), and the top of the arc-shaped elastic plate (105) is in contact with the lower surface of the limiting disc (108);

the steel strand wires (2) are located one end fixedly connected with disc (201) inside the buffering concave groove (102), the disc (201) is fixedly connected with buffer springs (202), the buffer springs (202) are sleeved on the peripheral side face of the steel strand wires (2), and one ends of the buffer springs (202) are fixedly connected with the inner top of the buffering concave groove (102).

2. A stay cable tension anchoring anti-retraction device according to claim 1, wherein the base (1) is fixedly connected with ear plates (109) at four sides, and a ground nail (110) penetrates through one surface of each ear plate (109).