CN211947895U - Communicating type inhaul cable limiter - Google Patents

Abstract

The invention discloses a connecting cable stopper, comprising a first connecting plate, a second connecting plate and a cable. The first connecting plate is used to connect the bottom of the beam, and the second connecting plate is used to connect the top of the pier. The first connecting plate is provided with a first fixing column, the second connecting plate is provided with a second fixing column, the cable is wound on the first fixing column and the second fixing column, and the first fixing column is The two sides of the column corresponding to the winding part are respectively provided with two first limit rings, and the two sides of the corresponding winding part on the second fixed column are respectively provided with two second limit rings, which can effectively limit the pier, The two-way relative displacement between the beams can prevent the beam from falling. At the same time, the free path can be set to ensure that the limiter will not constrain the deformation of the bridge under normal use. The relationship between the force and displacement of the limiter can be designed to protect the There is no bending failure and shear failure at the bottom of the pier.

Description

A connecting cable stopper

technical field

The present application relates to the fields of bridge technology and earthquake technology, in particular to a connecting cable stopper.

Background technique

The main bearing arrangement of medium and small span bridges in my country is the full bridge arrangement plate rubber bearing or the middle pier plate rubber bearing, and the side pier PTFE sliding plate rubber bearing. This type of bridge does not have any connection between the bearing, the beam body and the pier, and only relies on friction to transmit the horizontal seismic force. At present, there are three kinds of limit devices commonly used in my country: steel plate limit device, prestressed steel strand limit device and cable limit device, namely steel plate limiter, prestressed steel strand limiter and cable limiter.

The inventor found that the steel plate limit device will limit the relative displacement of the pier and beam caused by temperature changes under normal use of the bridge, resulting in damage to the limit device or the bridge structure; the prestressed steel strand limit device and Although the cable limit device can avoid this problem by reserving the initial slack, because the working principle of these two limit devices is to limit the effect by the restoring force generated by the tension of the steel strand or cable, only the It can limit the displacement of the main beam in a single direction. When the relative displacement of the pier beam in the opposite direction occurs, the steel strand or cable will be in a relaxed state and cannot generate restoring force. Therefore, it is difficult to meet the cable limit on both sides of the same span bridge. The device also needs to play a limiting role.

SUMMARY OF THE INVENTION

The purpose of the present application is to provide a connecting cable stopper for the defects in the prior art, which can effectively limit the bidirectional relative displacement between the pier and the beam under the action of the earthquake, prevent the beam from falling, and can also set the The free path ensures that the stopper will not constrain the deformation of the bridge under normal use. The relationship between the force and displacement of the stopper can be designed to protect the pier bottom from bending damage and shear damage.

In order to achieve the above purpose, the following technical solutions are adopted:

A connecting cable stopper includes a first connecting plate, a second connecting plate and a cable, the first connecting plate is used to connect the bottom of the beam, the second connecting plate is used to connect the top of the pier, the first connecting plate A first fixing column is arranged on the connecting plate, a second fixing column is arranged on the second connecting plate, and the cable is wound on the first fixing column and the second fixing column to form a winding part to fix the first fixing column The column is connected to the second fixing column. Two first limiting rings are respectively provided on both sides of the first fixing column corresponding to the winding portion. A gap is left between the first limiting ring and the winding portion for the purpose of The cable is restricted from sliding in a limited range along the axial direction of the first fixing column. Two second limiting rings are respectively provided on both sides of the corresponding winding portion on the second fixing column. A gap is left therebetween for restricting the sliding of the cable along the axial direction of the second fixing column within a limited range.

Further, the first connecting plate is matched with a first embedded plate for pre-embedding inside the beam bottom, the first connecting plate is connected to the beam bottom through the first embedded plate, and the second connecting plate is matched with a beam bottom. The second pre-embedded plate is used for pre-embedding inside the pier top, and the second connecting plate is connected to the pier top through the second pre-embedded plate.

Further, the first embedded plate and the first connecting plate are connected and fixed by threaded fasteners, and the second connecting plate and the second embedded plate are connected and fixed by threaded fasteners.

Further, there are two first connecting plates and they are arranged oppositely, and two ends of the first fixing column are respectively connected to the two first connecting plates; there are two second connecting plates, and they are oppositely arranged, the second Two ends of the fixed column are respectively connected with two second connecting plates.

Further, the axes of the first fixing column and the second fixing column are arranged in parallel, and a gap is left between the first fixing column and the second fixing column.

Further, the first limiting ring and the second limiting ring have the same structure, and both are annular structures formed by butting two semi-circular rings, and the centripetal side is fitted to the first fixing post or the second fixing post.

Further, the semi-circular rings are butted by fasteners to limit the relative sliding of the first limiting ring along the first fixing column and the relative sliding of the second limiting ring along the second fixing column.

Further, the cable is distributed along the axis direction of the first fixing column and the second fixing column in a way of winding one by one, forming a single-layer multi-turn structure.

Further, the stay cable is made of steel strands, high-strength steel wire ropes or carbon fiber bundles.

Further, the two first limit rings can slide relative to each other along the first fixing column to adjust the distance between the two first limit rings, and the two second limit rings can slide relative to each other along the second fixing column to adjust the distance between the two first limit rings. The second limit ring spacing.

Compared with the prior art, the advantages and positive effects of the present application are:

(1) The encircling arrangement of the stay cables ensures that the stay cables of the longitudinal bridge can be tightened in both directions to provide restoring force when an earthquake occurs, thereby limiting the relative displacement between the piers and beams within a controllable range. In order to prevent the beam from falling, the free path can also be set by adjusting the length of the cable to meet the longitudinal displacement requirements of the bridge under normal working conditions;

(2) The free path length of the limiter and the rigidity of the limit section of the cable can be flexibly designed by selecting parameters such as the type and length of the cable, and the lateral freedom of the limiter can be designed by adjusting the lateral gap between the limit ring and the cable Procedure. Through the design of the above parameters, this scheme can meet the limit requirements under different structural forms and ground motion parameters;

(3) Compared with limit devices such as stoppers, the cable device has a clear constitutive relationship and a clear force transmission path. The design displacement can be determined by calculation to achieve a balance between force and displacement, and protect the pier bottom from bending damage and shear damage. .

Description of drawings

The accompanying drawings that form a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute improper limitations on the present application.

FIG. 1 is a front view of the cable stopper according to Embodiment 1 of the application;

2 is a side view of the cable stopper according to Embodiment 1 of the application;

FIG. 3 is a transverse sectional view of the cable stopper according to Embodiment 1 of the application;

FIG. 4 is a schematic diagram of the position of the cable stopper arranged on the bridge according to Embodiment 1 of the application;

5 is a schematic diagram of the coordination between the cable stopper and the bottom of the beam and the top of the pier according to Embodiment 1 of the application;

FIG. 6 is a schematic structural diagram of the cable stopper of Embodiment 1 of the application when it is restrained and deformed;

FIG. 7 is a side view of the cable stopper according to Embodiment 1 of the application when it is constrained and deformed.

Among them: 1- first embedded board, 2- second embedded board, 3- first connecting board, 4- second connecting board, 5- cable, 6- cable clamp, 7- limit ring, 8- Fastening bolts, 9-anchor bolts.

Detailed ways

It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present application. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It should be noted that the terminology used herein is for the purpose of describing specific embodiments only, and is not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural as well, furthermore, it is to be understood that when the terms "comprising" and/or "including" are used in this specification, it indicates that the presence of features, steps, operations, devices, components and/or combinations thereof;

For the convenience of description, if the words "up", "down", "left" and "right" appear in this application, it only means that the directions of up, down, left and right are consistent with the drawings themselves, and do not limit the structure. It is to facilitate the description of the present invention and to simplify the description, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation on the application.

Terminology explanation part: Terms such as "installation", "connection", "connection", "fixation" in this application should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated; It can be a mechanical connection, it can also be an electrical connection, it can be a direct connection, it can also be indirectly connected through an intermediate medium, it can be an internal connection between two elements, or an interaction relationship between two elements, for those of ordinary skill in the art. , the specific meanings of the above terms in the present invention can be understood according to specific situations.

As described in the background art, the steel plate limiter in the prior art will limit the relative displacement of the pier and beam caused by the temperature change in the normal use state of the bridge, thereby causing the limit device or the bridge structure to be damaged; prestressing Although the steel strand limiter and the cable limiter can avoid this problem by reserving the initial slack, because the working principle of these two limiters is to recover from the restoring force generated by the tension of the steel strand or cable. If the limit effect is reached, the displacement of the main beam in a single direction can only be limited. When the relative displacement of the pier beam in the opposite direction occurs, the steel strand or cable will be in a relaxed state and cannot generate restoring force. Therefore, it is difficult to meet the requirements of the same span. In view of the requirement that the cable limiting devices on both sides of the bridge simultaneously play a limiting role, in view of the above technical problems, the present application proposes a connecting cable limiter.

Example 1

In a typical embodiment of the present application, as shown in FIG. 1 , a communicating cable stopper is proposed.

On the bridge where the connecting cable stopper is installed, the main beam body of the bridge and the top of the pier or the top of the cover beam are provided with pre-embedded plates, and the first connection plate and the second connection plate are installed on the pre-embedded plates, so that the cables are bypassed around the first and second connection plates. A connecting plate and a second connecting plate are clamped with cable clips, and a limit ring is arranged on the first connecting plate and the second connecting plate to form a cable limiter, so as to play a two-way limit and vertical and horizontal cable limit Bit free path with different effects.

Specifically, the connecting cable stopper includes a first connecting plate 3, a second connecting plate 4 and a cable 5. The first connecting plate is used to connect the bottom of the beam, and the second connecting plate is used to connect the top of the pier. The first connecting plate is provided with a first fixing column, the second connecting plate is provided with a second fixing column, and the cable is wound on the first fixing column and the second fixing column to form the winding part to The first fixing column is connected with the second fixing column, and two first limiting rings 7 are respectively provided on both sides of the first fixing column corresponding to the winding portion. The gap is used to limit the sliding of the cable along the axial direction of the first fixing column within a limited range. Two second limiting rings are respectively provided on both sides of the corresponding winding portion on the second fixing column. A gap is left between the ring and the winding portion for restricting the sliding of the cable along the axial direction of the second fixing column within a limited range;

The first connecting plate is matched with a first embedded plate 1 for pre-embedding in the bottom of the beam, the first connecting plate is connected to the bottom of the beam through the first embedded plate, and the second connecting plate is matched with a second connecting plate. The pre-embedded plate 2 is used for pre-embedding inside the pier top, and the second connecting plate is connected to the pier top through the second pre-embedded plate.

Referring to Figure 1, the bottom of the first connecting plate is welded with a base, the base is provided with bolt holes, the first embedded plate and the first connecting plate are connected and fixed by threaded fasteners, and the bottom of the second connecting plate is welded with The base is also provided with threaded holes, the second embedded plate and the second connecting plate are connected and fixed by threaded fasteners, and anchor bolts 9 are selected for the threaded fasteners.

It should be understood that, the first connecting plate and the second connecting plate can be connected to the bridge in various ways. The arrangement of the two pre-embedded plates can be cancelled, so that the two connecting plates are connected to the bottom of the beam and the top of the pier respectively. It can be welded to the internal steel structure of the beam bottom or bolted to anchor.

Further, there are two first connecting plates and they are arranged oppositely, and two ends of the first fixing column are respectively connected to the two first connecting plates; there are two second connecting plates, and they are oppositely arranged, the second The two ends of the fixing column are respectively connected with two second connecting plates; the connection method of the first fixing column and the second fixing column is welding to ensure the rigidity of the connection;

Further, the structure of the first limit ring and the second limit ring are the same, and both are annular structures formed by butting two semi-circles, and the centripetal side is attached to the first fixing column or the second fixing column; The semicircular rings are butted by fasteners to limit the relative sliding of the first limiting ring along the first fixing column and the relative sliding of the second limiting ring along the second fixing column; the fasteners are selected to be tightened. Fasten bolts 8.

The two first limit rings can slide relative to each other along the first fixing column to adjust the distance between the two first limit rings, and the two second limit rings can slide relative to each other along the second fixing column to adjust the two second limit rings. Limit ring spacing.

By adjusting the position of the first limit ring and the second limit ring, the sliding range of the cable on the first fixed column and the second fixed column can be adjusted, and the free path of the cable can be adjusted, which will not constrain the bridge in normal use. deformation that occurs below.

It should be specially pointed out that one of the technical points of the present application is the connection method of the cable in the stopper with the first connecting plate and the second connecting plate. Please refer to Figure 1, Figure 3, Figure 6 and Figure 7 for the connection methods of the three. When an earthquake occurs, a relative displacement will occur between the first connecting plate 3 and the second connecting plate 4 of the stopper. When the relative displacement exceeds the preset value During the stroke, the cable 5 begins to be deformed and tightened under force, and a restoring force is generated to limit the position. After the earthquake, the cables gradually returned to the initial arrangement state;

The second technical point of the present application is the assembly and arrangement of the cable 5. The total length of the cable 5 is determined according to the design size, and then directly wound around the first connecting plate 3 and the second connecting plate 4 corresponding to the first connecting plate 3 and the second connecting plate 4. On the fixed column and the second fixed column, the way of winding a single cable one by one can make the cable adjust the size of the single circle by itself under the action of earthquake, and also ensure that the cable has enough elongation and will not be pulled break.

Preferably, the stay cable is made of steel strands, high-strength steel wire ropes or carbon fiber bundles.

Of course, it should be understood that since the distances between the beam bodies and piers of different bridges are different, the limit force and limit distance that need to be applied are also uncertain, therefore: the cable is a single cable according to the The designed shape and size are wound and connected to form a ring through the anchoring device; the length of the cable is not fixed, and different lengths can be selected according to needs; the diameter of the cable is not fixed, and different sizes can be selected according to needs; Adjustment, suitable for all kinds of medium and small span continuous beam bridges using rubber bearings, which play a limiting role.

Example 2

Another typical embodiment of the present application further provides an installation method for the above-mentioned cable stopper, comprising the following steps:

Step 1: A first embedded board 1 is set at the bottom of the beam, a second embedded board 2 is set on the top of the cover beam, and steel bars with hooks are welded on the back of the first embedded board and the second embedded board;

Step 2: the first connecting plate 3 is fixed under the first embedded plate 1 through anchor bolts 9, and the second connecting plate 4 is fixed on the second embedded plate 2 through anchor bolts 9;

Step 3: Determine the total length of the through-length limiting cable 5 according to the design size, and then directly wrap it on the first and second fixed columns corresponding to the first connecting plate 3 and the second connecting plate 4 one by one. 6 clamping;

Step 4: Install the first limit ring and the second limit ring 7 on the fixing columns of the upper and lower connecting plates according to the design size, and lock them with the fastening bolts 8.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims (10)

1. A communicated inhaul cable limiter is characterized by comprising a first connecting plate, a second connecting plate and an inhaul cable, the first connecting plate is used for connecting the bottom of the beam, the second connecting plate is used for connecting the top of the pier, the first connecting plate is provided with a first fixing column, the second connecting plate is provided with a second fixed column, the inhaul cable is wound on the first fixed column and the second fixed column, is used for forming a winding part to connect the first fixing column with the second fixing column, two first limiting rings are respectively arranged on the two sides of the first fixing column corresponding to the winding part, a gap is reserved between each first limiting ring and the winding part, used for limiting the stay cable to slide in a limited range along the axial direction of the first fixed column, two second limiting rings are respectively arranged on the second fixed column corresponding to the two sides of the winding part, and a gap is reserved between the second limiting ring and the winding part and used for limiting the inhaul cable to slide in a limited range along the axial direction of the second fixing column.

2. The connected cable stopper according to claim 1, wherein the first connecting plate is fitted with a first pre-buried plate for being embedded in the inside of the beam bottom in advance, the first connecting plate is connected to the beam bottom through the first pre-buried plate, the second connecting plate is fitted with a second pre-buried plate for being embedded in the inside of the pier top in advance, and the second connecting plate is connected to the pier top through the second pre-buried plate.

3. The connected cable stopper of claim 2, wherein the first pre-buried plate and the first connecting plate are fixedly connected by a threaded fastener, and the second connecting plate and the second pre-buried plate are fixedly connected by a threaded fastener.

4. The connecting type inhaul cable limiter according to claim 1, wherein the two first connecting plates are oppositely arranged, and two ends of the first fixing column are respectively connected with the two first connecting plates; the second connecting plates are two and are arranged oppositely, and two ends of the second fixing column are connected with the two second connecting plates respectively.

5. The connecting type inhaul cable limiter of claim 4, wherein the axes of the first fixing column and the second fixing column are arranged in parallel, and a gap is reserved between the first fixing column and the second fixing column.

6. The connecting type inhaul cable limiter of claim 1, wherein the first limiting ring and the second limiting ring are identical in structure and are annular structures formed by butting two semicircular rings, and the centripetal side of the first limiting ring is attached to the first fixing column or the second fixing column.

7. The connected cable stopper of claim 6, wherein the semi-circular rings are abutted by fasteners for limiting relative sliding of the first stopper ring along the first anchor post and limiting relative sliding of the second stopper ring along the second anchor post.

8. The communication type inhaul cable limiter according to claim 1, wherein the inhaul cable is distributed along the axial direction of the first fixed column and the second fixed column in a winding mode one by one to form a single-layer multi-turn structure.

9. The connected cable stopper of claim 8, wherein the cable is made of a steel strand, a high strength steel wire rope, or a carbon fiber bundle.

10. The connecting type inhaul cable limiter as claimed in claim 1, wherein the two first limiting rings can slide relatively along the first fixing posts respectively to adjust the distance between the two first limiting rings, and the two second limiting rings can slide relatively along the second fixing posts respectively to adjust the distance between the two second limiting rings.

Images