CN115961548A - A stepped anti-skid backing plate and cable-stayed saddle - Google Patents

Abstract

The invention discloses a stepped anti-slip backing plate and a cable-stayed cable saddle, which are used for cooperating with the saddle end of a wire splitting tube for installation. The steps are provided with holes corresponding to the wire splitting pipes, and the prestressing tendon pipes formed by each of the wire splitting pipes and the corresponding holes are equal in length. A stepped anti-slip backing plate and cable-stayed cable saddle disclosed by the present invention compensates for the length difference between adjacent split-filament tube layers through the stepped anti-slip backing plate, so that the length of each layer of prestressed tendon pipes is the same, that is, The distance between the anti-skid keys at both ends of the prestressed tendons installed on the same cable saddle is the same. The prestressed tendons with anti-skid keys can be prefabricated in the factory. During on-site construction, the size and specification of the prestressed tendons are the same, which is not easy to be confused. Less prone to error.

Description

A stepped anti-skid backing plate and cable-stayed saddle

technical field

The invention relates to an anti-skid structure of a cable-stayed bridge cable saddle, in particular to a stepped anti-skid backing plate and a cable-stayed cable saddle.

Background technique

At present, in order to prevent the wear of the steel strands of the cable-stayed cables inside the saddle, anti-skid keys are often installed at both ends of the steel strands to match the backing plates at both ends of the saddle, and tensioned by a tensioning device, so that The prestress of the steel strand inside the cable saddle is greater than the prestress of the steel strand outside the cable saddle, so that during the vibration of the stay cable, the steel strand inside the cable saddle is in a static state, and the steel strand will not cause excessive wear. However, because the structure of the cable saddle has a certain radian, the length of each layer of the wire separation tube is different. Therefore, the anti-skid key on each steel strand needs to be processed according to the shape of the cable saddle and the specific installation position on site. The distance between the anti-skid keys at both ends of the stranded wire needs to be customized differently, resulting in the need for multiple sizes of a cable, which is very easy to be confused and error-prone during construction.

In the prior art, Chinese patent CN109778698A discloses a cable-stayed bridge saddle with an anti-skid key device, including a connector, a protective tube, an anti-skid key device, a cable saddle, and a tension bridge composed of multiple steel strands. The cable saddle is connected to the protective tube through the connecting piece, the anti-skid key device is installed inside the protective tube, and the anti-skid key device consists of a first anti-skid pressure plate, an open type anti-skid key Composed of the second anti-slide pressure plate, the first anti-slide pressure plate and the second anti-slide pressure plate are provided with through holes for passing steel strands, and a gap is provided along the wall of the open anti-slide key tube, and the steel strands pass through The gap is placed inside the open anti-skid key, and the two ends of the open anti-skid key are locked and limited by the first anti-skid pressure plate and the second anti-skid pressure plate. In this prior art, anti-skid keys are arranged at the ends of each steel strand at the two ends of the cable saddle, so that the anti-skid keys cooperate with the backing plates at both ends of the cable saddle to achieve the anti-skid effect, but the backing plates at both ends of the cable saddle are It is a planar structure, resulting in different anti-skid key spacing at both ends of each steel strand, which requires different customization.

Contents of the invention

In view of the above problems, the present invention provides a stepped anti-skid backing plate and cable-stayed cable saddle, which aims to solve the problem that the anti-skid key spacing at both ends of each steel strand is different due to the existing anti-skid structure, and needs to be customized differently. It is prone to confusion and error-prone problems.

The present invention takes the following technical solutions to achieve the above object:

A stepped anti-slip backing plate, used for installation with the saddle end of the wire splitting tube, the backing plate includes steps with the same number of layers as the splitting tube, each step is provided with a Corresponding to the channel, the length of the prestressing tendon pipeline formed by each said wire splitting tube and its corresponding channel is equal.

The stepped anti-slip pads in this technical solution are installed at the end of the cable saddle. The anti-slip system includes two technical solutions: first, the two ends of the cable saddle respectively include a stepped anti-slip pad and a conventional pad. plate (that is, a backing plate with both ends flat), in this scheme, the height difference between the adjacent steps of the stepped anti-slip backing plate is the length difference between the two layers of splitting tubes matched with the above steps, so that each splitting tube The length of the prestressed tendon pipe formed by its corresponding tunnel is equal; second, the two ends of the cable saddle respectively include the first stepped anti-slip backing plate and the second stepped anti-slip backing plate. In this scheme, the two stepped anti-slip The size of the backing plate can be the same or different. The sum of the height difference between the adjacent steps of the first stepped anti-slip backing plate and the corresponding adjacent steps of the second stepped anti-slip backing plate is equal to the corresponding two layers The difference in the length of the wire tubes can make the length of the prestressed tendon pipe formed by each wire split tube and its corresponding hole equal; the above scheme can compensate the length of the adjacent wire split tube layer, so that the The same length, that is, the distance between the anti-skid keys at both ends of the prestressed tendons installed on the same cable saddle is the same. The prestressed tendons with anti-skid keys can be prefabricated in the factory. During on-site construction, the size and specification of the prestressed tendons Same, less confusing, less error-prone.

A further technical solution is that the backing plate is an integral structure.

A cable-stayed cable saddle, comprising at least one of the above-mentioned stepped anti-skid backing plates, and also including prestressed tendons and wire dividing pipes; Anchoring structures are provided at both ends of the stress tendon pipe.

In this technical scheme, prestressed tendon anchorage structures are arranged at both ends of the prestressed tendon pipeline, and the prestressed tendon cable force F1 in the prestressed tendon pipeline is greater than the two ends of the prestressed tendon pipeline F2, F3, when the cable force F1 in the prestressed tendon pipe reaches the target force, use the anchorage structures at both ends to anchor, and keep the state of F1>F2/F3. When the cable force F2/F3 changes, F1 remains unchanged. The prestressed tendons in the stress tendon pipe will never slip relative to each other, that is, to achieve high anti-sliding force (greater than the design cable force) and zero wear.

A further technical solution is that the anchoring structure includes an anti-skid key fixed on the prestressed tendon, a threaded sleeve threadedly connected to the outer ring of the anti-slip key, and the threaded sleeve is clamped on the outer end of the channel of the anti-slip backing plate .

In this technical solution, the anti-skid key is prefabricated and consolidated on the prestressed tendon. The anti-skid key is a hollow column, which is cold-extruded to the metal member by mechanical equipment. The anchoring force of the anti-skid key and the prestressed tendon is not less than 50% of the breaking force of the prestressed tendon. The surface of the consolidated anti-skid key is designed with external threads. The prestressed tendon will elongate after being stretched. After reaching the target cable force, the threaded sleeve is clamped on the cable by adjusting the thread. The end face of the saddle is adjusted and locked to keep the prestressed tendon cable force in the channel constant. The anchoring structure in this technical solution can realize the adjustment of the cable force during the construction process or in the application process. Among them, the anti-sliding system can be an anchoring structure with an adjustable cable force at one end, and the other end is the anchoring structure in the following technical solution or Conventional anchoring structures such as clips and taper holes can also be anchoring structures with adjustable cable forces at both ends. In addition, the outer diameter of the anti-skid key is smaller than the inner diameter of the hole of the anti-skid backing plate, which can meet the prefabrication of prestressed tendons in the factory, and facilitate construction such as threading and tensioning on site.

A further technical solution is that the anchoring structure includes an anti-skid key and a backing ring fixed on the prestressed tendon; the backing ring is provided with a through hole for penetrating the prestressing tendon, and the first end surface of the backing ring is clamped on the At the outer end of the hole of the anti-skid backing plate, the end face of the anti-skid key is engaged with the second end face of the gasket.

In this technical solution, the anti-skid key can be consolidated on the prestressed tendon by using the method in the above technical solution. After the prestressed tendon is stretched and stretched to reach the target cable force, the backing ring is used to fill the prestressed tendon due to the force of the prestressed tendon. The gap between the anti-slip key and the stepped anti-slip backing plate caused by elongation. In addition, the outer diameter of the anti-slip key is smaller than the inner diameter of the anti-slip backing plate hole, which can meet the prefabrication of prestressed tendons in the factory and facilitate on-site threading Construction such as stretching.

The beneficial effects of the present invention are:

1. Compensate the length difference of the adjacent wire split tube layers through the stepped anti-slip backing plate, so that the length of each layer of prestressed tendon pipes is the same, that is, the anti-slip keys at both ends of the prestressed tendons installed on the same cable saddle The spacing is the same, and the prestressed tendons with anti-skid keys can be prefabricated in the factory. During on-site construction, the prestressed tendons have the same size and specification, which is less likely to be confusing and error-prone.

2. Adjustable anchoring structure is adopted, which can realize the adjustment of cable force during construction or application.

3. The prestressed tendons in the prestressed tendons will never slip relative to each other, that is, to achieve high anti-sliding force and zero wear.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the first stepped anti-skid backing plate of the present invention.

Fig. 2 is a cross-sectional view of the first stepped anti-skid backing plate of the present invention.

Fig. 3 is a schematic diagram of the structure of the cable-stayed saddle of the present invention.

Fig. 4 is a cross-sectional view of the filament separating tube of the present invention.

Fig. 5 is a schematic diagram of the anchoring structure with screw adjustment according to the present invention.

Fig. 6 is a schematic diagram of the anchoring structure with a washer ring according to the present invention.

In the picture:

11. The first stepped anti-slip backing plate; 12. The second stepped anti-slip backing plate; 101. The first step; 102. The second step; 103. The third step; 104. The fourth step; 105. The fifth step; 106. The sixth step; 107. The seventh step; 10. The tunnel; 2. The splitting tube; 201. The first splitting tube; 202. The second splitting tube; 203 204, the fourth layer of wire separation pipe; 205, the fifth layer of wire separation pipe; 206, the sixth layer of wire separation pipe; 207, the seventh layer of wire separation pipe; 31, the first anchor pad 32, the second anchor plate; 4, the prestressed tendon; 51, the first anti-skid key; 52, the threaded sleeve; 61, the second anti-skid key; 62, the backing ring.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings 1 to 6, and the following embodiments and the features in the embodiments can be combined with each other under the condition of no conflict.

As shown in Figures 1 to 2, this embodiment provides a stepped anti-skid backing plate for installation in conjunction with the saddle end of the wire splitting tube. The same steps, the steps described in each layer are provided with channels 10 corresponding to the wire-splitting tubes, and the lengths of the prestressed tendon pipes formed by each of the said wire-splitting tubes and their corresponding channels are equal;

Specifically, it will be explained by taking the step-type anti-skid pads at both ends of the cable saddle as an example. The first anchor backing plate 31 and the second anchor backing plate 32 inside the side, the first stepped anti-slip backing plate 11 and the second stepped anti-skid backing plate 12 outside the two sides of the cable tower, wherein the first stepped anti-skid backing plate 12 The sliding backing plate 11 and the second stepped anti-slip backing plate 12 are the same structure in size and shape, and the splitting tubes 2 are from high to low (long to short in length) successively as the first layer of splitting tubes 201, the second layer Filament tube 202, third layer of tube 203, fourth tube 204, fifth tube 205, sixth tube 206 and seventh tube 207; The sliding backing plate 11 and the second stepped anti-slip backing plate 12 are respectively provided with steps matched with the above-mentioned split tube layer, and the first stepped anti-slip backing plate 11 is used as an example for illustration, including Cooperate with the first step 101, the second step 102, the third step 103, the fourth step 104, the fifth step 105, the sixth step 106 and the seventh step 107 from low to high. The steps are provided with channels 10 that match with the corresponding splitting tubes. Taking the height difference L between the second step 102 and the first step 101 as an example, the first layer splitting tube 201 and the second splitting tube The length difference of silk tube 202 is H, and the size and the shape of the first stepped anti-slip backing plate 11 and the second stepped anti-slip backing plate 12 are identical, therefore, L=H/2, so just can be to adjacent branch wire The length of the tube layer is compensated so that the length of each layer of prestressed tendon pipes (filament pipe + tunnel) is the same; that is, the distance between the anti-skid keys at both ends of the prestressed tendon 4 installed on the same cable saddle is the same, with anti-skid The prestressed tendons 4 of the key can be prefabricated in a factory, and the size and specification of the prestressed tendons are the same during on-site construction, which is less likely to be confusing and less likely to make mistakes.

Each prestressed tendon 4 in the above embodiment is provided with an anchoring structure at both ends of the prestressed tendon pipeline; as shown in Figures 5 to 6, the specific anchoring structure in this embodiment is as follows:

The anchoring structure at the end of the first stepped anti-skid backing plate includes a first anti-skid key 51 fixed on the prestressed tendon 4, a threaded sleeve 52 threaded with the outer ring of the first anti-skid key 51, and the threaded sleeve 52 clamps Connected to the outer end of the anti-skid backing channel; the anchoring structure at the end of the second stepped anti-skid backing plate includes a second anti-skid key 61 and a backing ring 62 fixed on the prestressed tendon 4, and the backing ring 62 is provided for penetrating The through hole of the prestressing rib 4, the first end surface of the backing ring 62 is clamped on the outer end of the channel of the second stepped anti-slip backing plate 12, and the end surface of the second anti-skid key 61 is clamped on the first end surface of the gasket 62. On the two end faces, the outer diameter of the second anti-skid key 61 is less than the inner diameter of the second stepped anti-skid backing plate 12 holes; the first anti-skid key 51 and the second anti-skid key 61 are prefabricated on the prestressed tendon 4, and the above-mentioned anti-skid key The sliding key is a hollow column, and the metal component is cold-extruded by mechanical equipment. The anchoring force between the above-mentioned anti-sliding key and the prestressed tendon 4 is not less than 50% of the breaking force of the prestressed tendon 4. The surface of the first anti-sliding key 51 The design has external threads, and the prestressed tendons 4 will elongate after being stretched. After reaching the target cable force, the threaded sleeve 52 is clamped on the outer end surface of the first stepped anti-slip backing plate 11 by adjusting the threads to adjust and lock. At the same time, the gap between the second anti-skid key 61 and the outer end surface of the second stepped anti-skid backing plate 12 due to the elongation of the prestressed tendon 4 is filled with the backing ring 62, wherein the backing ring 62 is a Haval structure, Parameters such as the specific thickness and quantity can be set according to the actual working conditions, keeping the cable force of the prestressed tendon 4 in the channel unchanged; the specific installation process is: through the tensioning device, the prestressed tendon cable force F1 It is greater than the cable forces F2 and F3 at both ends of the prestressed tendon pipe. When the cable force F1 in the prestressed tendon pipe reaches the target force, the anchorage structures at both ends are used for anchoring, and the state of F1>F2/F3 is maintained. When F2/F3 changes, F1 remains unchanged, and the prestressed tendons in the prestressed tendon pipe will never slip relative to each other, that is, to achieve high anti-sliding force (greater than the design cable force) and zero wear. In addition, by adopting the above-mentioned adjustable anchoring structure, it is possible to realize the adjustment of the cable force during the construction process or the application process.

The above embodiment exemplarily shows the cable saddle structure of two stepped anti-skid pads with the same size and shape. In other embodiments or practical applications, a stepped anti-skid pad and a conventional pad can also be used. plate (i.e. a backing plate whose both ends are flat), the height difference between the adjacent steps of the stepped anti-slip backing plate in this embodiment is the length difference between the two layers of wire splitting tubes matched with the above steps, so that each split wire The length of the prestressed tendon pipe formed by the pipe and its corresponding channel is equal. Or can also adopt the first stepped anti-slip backing plate 11 and the second stepped anti-slip backing plate 12 that are different in size and shape, the height difference between the adjacent steps of the first stepped anti-slip backing plate 11, the second stepped The sum of the height differences of the adjacent steps corresponding to the anti-skid backing plate 12 is equal to the length difference of the corresponding two-layer wire splitting tubes, and in the same way, the length of the prestressed tendon pipeline formed by each splitting wire tube and its corresponding channel can be equal. , that is, to achieve the effect of the above-mentioned embodiment. In addition, the integral backing plate structure in the above embodiment may also be a split structure, for example, each layer of steps is spliced to form a stepped anti-skid backing plate.

The above embodiment exemplarily shows the specific anchoring structure of the first stepped anti-slip backing plate end and the second stepped anti-slip backing plate end. The anchoring structure of the anti-skid key 51 and the threaded sleeve 52 may adopt the above-mentioned anchoring structure including the second anti-skid key 61 and the backing ring 62, or adopt anchoring structures such as clips and tapered holes in the prior art.

The invention provides a stepped anti-slip backing plate and cable-stayed cable saddle, which compensates the length difference between the adjacent split-filament tube layers through the stepped anti-slip backing plate, so that the length of each layer of prestressed tendon pipes is the same, that is, The distance between the anti-skid keys at both ends of the prestressed tendons installed on the same cable saddle is the same. The prestressed tendons with anti-skid keys can be prefabricated in the factory. During on-site construction, the size and specification of the prestressed tendons are the same, which is not easy to be confused. It is not easy to make mistakes; the adjustable anchor structure can realize the adjustment of the cable force during the construction process or the application process; the prestressed tendons in the prestressed tendon pipe will never slip relative to each other, that is, to achieve high anti-sliding force and zero wear purpose.

Claims (5)

1. The utility model provides a cascaded antiskid backing plate for with divide silk pipe cable saddle tip cooperation installation, the backing plate includes the step the same with divide silk pipe layer number, every layer the step on be equipped with divide the corresponding pore of silk pipe, every divide silk pipe to equal rather than the prestressing tendons pipeline length that corresponding pore formed.

2. The stepped skid resistant shim plate of claim 1, wherein said shim plate is of unitary construction.

3. A stay cable saddle, characterized by comprising at least one step type skid-resistant backing plate of claim 1, and also comprising prestressed tendons and a wire dividing pipe; the prestressed tendon is arranged in the prestressed tendon pipeline in a penetrating mode, and anchoring structures are arranged at two ends of the prestressed tendon pipeline.

4. The cable saddle for the stayed cable according to claim 3, wherein the anchoring structure comprises an anti-sliding key fixed on the prestressed tendon and a threaded sleeve in threaded connection with an outer ring of the anti-sliding key, the threaded sleeve is clamped at the outer end of the hole of the anti-sliding base plate, and the outer diameter of the anti-sliding key is smaller than the inner diameter of the hole of the anti-sliding base plate.

5. A cable saddle for a suspension cable according to claim 3, wherein said anchoring structure comprises an anti-slip key and a grommet fixed to said tendon; the backing ring is provided with a through hole for penetrating through the prestressed tendon, the first end face of the backing ring is clamped at the outer end of the channel of the anti-sliding backing plate, and the end face of the anti-sliding key is clamped at the second end face of the gasket; the outer diameter of the anti-sliding key is smaller than the inner diameter of the pore passage of the anti-sliding base plate.

Images