Cable-stayed bridge pre-buried sleeve positioning structure

Abstract

The utility model provides a kind of cable-stayed bridge pre-burying sleeve positioning structure, it is related to sleeve positioning structure technical field, including bottom plate platform, still include drive member setting in the one side of bottom plate platform, shaft sleeve is set in the inner side of bottom plate platform, fixed part is set in the outer side of one end of shaft sleeve, support block is set in the one side of shaft sleeve, for supporting and limiting sleeve, linkage of sliding block, first rotary arm and other components are driven by telescopic cylinder, automatically adjust support force according to sleeve weight, when facing heavy load sleeve, structure will follow the downward trend generated by sleeve weight, constantly enhance the support force of support block to sleeve inner wall, ensure that sleeve remains stable during pre-burying, effectively prevent displacement, inclination and other problems caused by insufficient support.

Description

Technical Field

[0001] This utility model relates to the field of sleeve positioning structure technology, and in particular to a pre-embedded sleeve positioning structure for cable-stayed bridges. Background Technology

[0002] The pre-embedded sleeve positioning structure for cable-stayed bridges is a key structural system used to accurately fix the spatial position of the cable-stayed cable sleeves during construction. Its core is rigidly connected to the steel reinforcement cage through components such as steel brackets, adjustable screws, and clamps. This ensures that the angle, coordinates, elevation, and other parameters of the sleeve before and after concrete pouring meet the design requirements, thereby guaranteeing the installation accuracy of the cable stays and the reliability of cable force transmission. After introducing BIM (Building Information Modeling) technology, the design and construction process of this positioning structure has been comprehensively optimized. By simulating the sleeve positioning scheme in advance through the BIM model, the spatial relationship between the sleeve and the main beam and tower reinforcement is visualized, collision risks are predicted, and the bracket layout is optimized.

[0003] The core function of the pre-embedded sleeve is to position and guide the installation of the stay cables. The fixed connection between the stay cables and the main beam and tower does rely on the cooperation of other components. The pre-embedded sleeve is fixed in the designed position of the main beam or tower before the concrete is poured, providing a precise cable passage for the stay cables and ensuring that the cables are arranged according to the designed angle and position. Similar to the pre-embedded water and electricity pipelines in buildings, the sleeve is the "planned path" for the stay cables, but it does not directly bear the connection force.

[0004] A search revealed that Chinese patent number CN221663444U discloses a positioning structure for pre-embedded sleeves of cable-stayed bridges, belonging to the field of pre-embedded sleeves for cable-stayed bridges. The positioning structure for pre-embedded sleeves of cable-stayed bridges includes a base plate platform, with an electric telescopic rod rotatably connected to the bottom of the base plate platform. It also includes a drive disc, which is fixedly connected to the bottom of the electric telescopic rod. The surface of the drive disc has an arc-shaped hole, which allows the arc-shaped outer support plate to abut against and support the inner wall of the sleeve, thereby fixing and positioning the sleeve and facilitating the pre-embedding of the sleeve.

[0005] The arc-shaped outer support plate of the above-mentioned technology may fall off due to loose connections or component wear after uneven stress or vibration, resulting in deformation of the supported component, displacement of position or interruption of construction, affecting installation accuracy and structural stability. Fallen components can easily become safety hazards on the construction site, causing personal injury or equipment damage. At the same time, the positioning structure of the above-mentioned technology has a fixed position and poor adaptability, making it difficult to adapt to straight sleeves of different sizes and lengths, and unable to penetrate deep into the straight sleeve for support and restraint. Utility Model Content

[0006] The purpose of this utility model is to provide a positioning structure for pre-embedded sleeves of cable-stayed bridges, which can solve the problem that the arc-shaped outer support plate of the above-mentioned technology may fall off due to uneven force or vibration, such as loose connection or component wear, resulting in deformation of the supported component, positional displacement or construction interruption, affecting installation accuracy and structural stability. The fallen component can easily become a safety hazard on the construction site, causing personnel injury or equipment damage. At the same time, the positioning structure of the above-mentioned technology has a fixed position and poor adaptability, making it difficult to adapt to straight sleeves of different sizes and lengths, and unable to penetrate deep into the straight sleeve for support and positioning.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a positioning structure for a pre-embedded sleeve of a cable-stayed bridge, including a base plate platform, and further comprising:

[0008] A driving component is disposed on one side of the base plate platform;

[0009] A bushing is provided on the inner side of the base plate platform;

[0010] A fixing element is provided on the outer side of one end of the bushing;

[0011] A support block is disposed on one side of the bushing and is used to support and limit the bushing.

[0012] In a preferred embodiment, the driving component includes:

[0013] The mounting frame is fixedly installed on the upper surface of the base plate platform;

[0014] The first motor is installed inside the mounting frame;

[0015] A limiting shaft is fixedly disposed on the outside of the main shaft of the first motor, and a bushing is slidably disposed on the outside of the limiting shaft. One end of the bushing is connected to the fixing member.

[0016] In a preferred embodiment, a second motor is mounted on the lower surface of the base platform, and a gear is fixedly disposed on the outer side of the main shaft of the second motor, with the outer side of the gear contacting the outer side of the bushing.

[0017] In a preferred embodiment, a rectangular through groove is provided on the inner side of the bushing, and a rectangular protrusion is provided on the outer side of the limiting shaft for limiting the bushing.

[0018] In a preferred embodiment, a fixing hook is fixedly provided on the lower surface of the base plate platform, and the arc-shaped structure at the end of the fixing hook is provided on the outside of the second motor.

[0019] In a preferred embodiment, the fastener includes:

[0020] A connecting plate is fixedly installed on the outer side of the bottom end of the bushing;

[0021] A connecting shaft is fixedly mounted on the lower surface of the connecting plate;

[0022] A sliding block is slidably disposed on the outside of the connecting shaft;

[0023] The first rotating arm is rotatably mounted on the inner side of the end of the sliding block;

[0024] A connecting post is fixedly installed on the outer side of the end of the connecting shaft;

[0025] Connectors are fixedly installed on the outer sides of both ends of the connecting post;

[0026] The second rotating arm is rotatably disposed on the inner side of the end of the connector, and a support block is connected to the outer side of the end of the second rotating arm of the first rotating arm.

[0027] In a preferred embodiment, a plurality of telescopic cylinders are annularly mounted on the lower surface of the connecting plate, and the outer ends of the telescopic cylinders are connected to the lower surface of the connecting shaft.

[0028] In a preferred embodiment, a friction strip is fixedly provided on the outer side of one end of the support block, and the friction strip is made of rubber.

[0029] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0030] This invention, during use, utilizes a telescopic cylinder to drive the linkage of components such as the sliding block and the first rotating arm, automatically adjusting the support force according to the weight of the casing. When facing heavy-load casings, the structure continuously strengthens the support force of the support block on the inner wall of the casing as the casing weight causes a downward shift, ensuring the casing remains stable during pre-embedding and effectively preventing displacement and tilting caused by insufficient support. Compared to traditional fixed support methods, this structure can adaptively adjust without manual intervention, improving construction efficiency, reducing safety risks caused by support failure, and also reducing costs associated with frequent replacement of support components. It greatly enhances the reliability and applicability of pre-embedded casing positioning and allows for flexible adjustment of support points according to actual construction needs, ensuring the casing is firmly fixed in all directions, avoiding deformation or displacement caused by localized stress concentration, effectively improving pre-embedding accuracy and reducing construction errors. Attached Figure Description

[0031] Figure 1 A front view schematic diagram of a pre-embedded sleeve positioning structure for a cable-stayed bridge provided by this utility model;

[0032] Figure 2 A schematic diagram of the first motor and the limiting shaft in the pre-embedded sleeve positioning structure of a cable-stayed bridge provided by this utility model;

[0033] Figure 3 A schematic diagram of the connecting shaft and sliding block in the pre-embedded sleeve positioning structure of a cable-stayed bridge provided by this utility model;

[0034] Figure 4 This utility model provides a schematic diagram of the structure of the second rotating arm and friction strip in a pre-embedded sleeve positioning structure for a cable-stayed bridge.

[0035] Legend:

[0036] 1. Base plate platform; 2. Support block; 201. Connecting plate; 202. Connecting shaft; 203. Sliding block; 204. First rotating arm; 205. Connecting piece; 206. Connecting column; 207. Second rotating arm; 208. Friction strip; 209. Telescopic cylinder; 3. Bushing; 301. Mounting frame; 302. First motor; 303. Limiting shaft; 304. Second motor; 305. Gear; 306. Fixing hook. Detailed Implementation

[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] Example 1:

[0039] Please see Figures 1-4 This embodiment provides a positioning structure for pre-embedded sleeves in cable-stayed bridges that facilitates fixing and limiting the sleeve. The specific idea is as follows:

[0040] The cable-stayed bridge pre-embedded sleeve positioning structure includes a base plate platform 1. In addition, the cable-stayed bridge pre-embedded sleeve positioning structure also includes a support block 2 set on the outer side of the bottom end of the base plate platform 1, which is used to support the inner wall surface of the sleeve and achieve the effect that the heavier the sleeve, the more firmly the support block 2 is fixed to the inner wall of the sleeve. A bushing 3 is set on the inner side of one end of the base plate platform 1.

[0041] In order to drive the support block 2, this embodiment provides a fastener that can drive the support block 2 to expand outward to support and limit the inner side of the sleeve.

[0042] The fixing components include: a connecting plate 201 fixedly connected to the outer side of the end of the bushing 3; a plurality of telescopic cylinders 209 are annularly mounted on one side of the connecting plate 201 for driving the sliding block 203 on the outer side of its end to move vertically; a connecting shaft 202 is fixedly connected to the lower surface of the connecting plate 201; the outer side of the connecting shaft 202 is slidably connected to the inner side of the middle part of the sliding block 203; a plurality of first rotating arms 204 are rotatably connected to the inner side of the end of the sliding block 203; the plurality of first rotating arms 204 rotate vertically; a support block 2 is rotatably connected to the outer side of the end of the first rotating arm 204; a connecting column 206 is fixedly connected to the outer side of the bottom end of the connecting shaft 202; a connecting piece 205 is fixedly connected to the outer sides of both ends of the connecting column 206; a plurality of second rotating arms 207 are rotatably connected to the inner side of the end of the connecting piece 205; the second rotating arms 207 rotate vertically; and the outer sides of the ends of the two sets of second rotating arms 207 are rotatably connected to the inner side of the support block 2.

[0043] Among them, a friction strip 208 is fixedly connected to the outer side of one end of the support block 2. The friction strip 208 is made of rubber and is used to increase the friction between the support block 2 and the inner wall of the sleeve, thereby increasing the firmness of the sleeve fixation.

[0044] In practice, when using this device to fix the sleeve, the user can place the sleeve over the outside of multiple support blocks 2. At this time, multiple telescopic cylinders 209 are activated. The telescopic cylinders 209 drive the sliding block 203 to move vertically downwards. Simultaneously, the sliding block 203 pushes one end of the first rotating arm 204, causing the first rotating arm 204 to move the support block 2 outwards. Simultaneously, it drives multiple second rotating arms 207 to rotate until the support block 2 and friction strip 208 contact the inner wall of the sleeve, thus supporting the sleeve. Meanwhile, when the casing is heavy, the casing will cause the support block 2 to tend to move downward. The downward tendency of the support block 2 will cause the sliding block 203 to move vertically downward through the first rotating arm 204. When the sliding block 203 moves vertically downward, it will continue to drive multiple first rotating arms 204 to rotate, gradually approaching a horizontal state. However, when the first rotating arm 204 approaches a horizontal state, it will continue to drive multiple support blocks 2 to move outward, further supporting the inner wall of the casing, thereby achieving the effect that the heavier the casing, the greater the supporting force of the support block 2.

[0045] Example 2:

[0046] like Figures 1-2 As shown, based on Embodiment 1, this embodiment also provides a positioning structure for a pre-embedded sleeve of a cable-stayed bridge that can move and rotate the fixing component in the vertical direction, thereby realizing the adjustment of the height and position of the support block 2 to accommodate sleeves of different lengths. The specific idea is as follows:

[0047] The pre-embedded sleeve positioning structure of the cable-stayed bridge is equipped with a driving component, which can realize the rotation and lifting functions of the fixed component. The driving component includes: a mounting frame 301 fixedly connected to the upper surface of the base plate platform 1 for mounting a first motor 302. A limiting shaft 303 is fixedly connected to the outer side of the main shaft of the first motor 302. A bushing 3 is sleeved on the outer side of the limiting shaft 303. At the same time, a second motor 304 is installed on the lower surface of the base plate platform 1. A gear 305 is connected to the bottom of the outer side of the main shaft of the second motor 304. The outer side of the gear 305 contacts the outer side of the bushing 3. A fixing hook 306 is fixedly connected to the lower surface of the base plate platform 1. The second motor 304 is further fixed through its arc structure, increasing the connection strength of the second motor 304.

[0048] The bushing 3 has a rectangular through groove on its inner side, and the limiting shaft 303 has a rectangular protrusion on its outer side. When the limiting shaft 303 rotates, the rectangular protrusion matches the rectangular through groove, causing the bushing 3 to rotate, so that the bushing 3 can only move vertically on the outer side of the limiting shaft 303 and rotate synchronously with the limiting shaft 303.

[0049] In specific implementation: When the user needs to adjust the height of the support block 2, the second motor 304 can be started. The second motor 304 drives the gear 305 to rotate. Through its cooperation with the outer gear ring structure of the bushing 3, the bushing 3 can be driven to move vertically, thereby adjusting the height of the support block 2 so that the support block 2 supports the other positions of the sleeve. The user can start the first motor 302. The first motor 302 drives the bushing 3 to rotate through the limiting shaft 303, thereby rotating the support block 2, which can support different positions inside the sleeve, increasing the flexibility of the device.

[0050] Working principle:

[0051] Based on Example 1, the telescopic cylinder 209 drives the sliding block 203, the first rotating arm 204, and other components to automatically adjust the support force according to the weight of the casing. When faced with a heavy-load casing, the structure continuously strengthens the support force of the support block 2 on the inner wall of the casing as the casing weight causes downward movement, ensuring the casing remains stable during the pre-embedding process and effectively preventing displacement and tilting caused by insufficient support. Compared with the traditional fixed support method, this structure can adaptively adjust without manual intervention, improving construction efficiency, reducing safety risks caused by support failure, and also reducing the cost of frequently replacing support components, greatly enhancing the reliability and applicability of pre-embedded casing positioning.

[0052] Based on Example 2, by starting the second motor 304 to drive the gear 305 to rotate, the vertical movement of the bushing 3 is achieved by cooperating with the outer gear ring of the bushing 3, thereby adjusting the height of the support block 2. This allows for support at different height positions of the sleeve, meeting the requirements of different pre-embedding depths. Starting the first motor 302 drives the bushing 3 to rotate via the limiting shaft 303, thereby rotating the support block 2. This allows for the application of support force to different positions in the inner circumferential direction of the sleeve. This design can not only cope with complex working conditions such as irregular sleeve shape and uneven stress, but also flexibly adjust the support points according to actual construction needs, ensuring that the sleeve can be stably fixed in all directions, avoiding deformation or displacement caused by local stress concentration, effectively improving pre-embedding accuracy and reducing construction errors.

[0053] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A positioning structure for a pre-embedded sleeve of a cable-stayed bridge, comprising a base plate platform (1), characterized in that: Also includes: A driving component is disposed on one side of the base plate platform (1); A bushing (3) is disposed on the inner side of the base plate platform (1); A fixing element is provided on the outer side of one end of the bushing (3); A support block (2) is provided on one side of the bushing (3) to support and limit the bushing.

2. The positioning structure for a pre-embedded sleeve of a cable-stayed bridge according to claim 1, characterized in that: The driving component includes: The mounting frame (301) is fixedly installed on the upper surface of the base plate platform (1); The first motor (302) is installed inside the mounting frame (301); The limiting shaft (303) is fixedly disposed on the outside of the main shaft of the first motor (302), and the bushing (3) is slidably disposed on the outside of the limiting shaft (303). One end of the bushing (3) is connected to the fixing member.

3. The positioning structure for a pre-embedded sleeve of a cable-stayed bridge according to claim 2, characterized in that: A second motor (304) is installed on the lower surface of the base plate platform (1). A gear (305) is fixedly installed on the outer side of the main shaft of the second motor (304). The outer side of the gear (305) is in contact with the outer side of the bushing (3).

4. The positioning structure for a pre-embedded sleeve of a cable-stayed bridge according to claim 3, characterized in that: The inner side of the bushing (3) is provided with a rectangular through groove, and the outer side of the limiting shaft (303) is provided with a rectangular protrusion, which is used to limit the bushing (3).

5. The positioning structure for a pre-embedded sleeve of a cable-stayed bridge according to claim 3, characterized in that: A fixing hook (306) is fixedly provided on the lower surface of the base plate platform (1), and the arc-shaped structure at the end of the fixing hook (306) is provided on the outside of the second motor (304).

6. The positioning structure for a pre-embedded sleeve of a cable-stayed bridge according to claim 2, characterized in that: The fastener includes: A connecting plate (201) is fixedly disposed on the outer side of the bottom end of the bushing (3); A connecting shaft (202) is fixedly disposed on the lower surface of the connecting plate (201); A sliding block (203) is slidably disposed on the outside of the connecting shaft (202); The first rotating arm (204) is rotatably disposed on the inner side of the end of the sliding block (203); A connecting post (206) is fixedly disposed on the outer side of the end of the connecting shaft (202); The connector (205) is fixedly disposed on the outer sides of both ends of the connecting post (206); The second rotating arm (207) is rotatably disposed on the inner side of the end of the connector (205), and a support block (2) is connected to the outer side of the end of the second rotating arm (207) of the first rotating arm (204).

7. The positioning structure for a pre-embedded sleeve of a cable-stayed bridge according to claim 6, characterized in that: The lower surface of the connecting plate (201) is circumferentially equipped with a plurality of telescopic cylinders (209), and the outer side of the end of the telescopic cylinder (209) is connected to the lower surface of the connecting shaft (202).

8. The positioning structure for a pre-embedded sleeve of a cable-stayed bridge according to claim 6, characterized in that: A friction strip (208) is fixedly provided on the outer side of one end of the support block (2), and the friction strip (208) is made of rubber.

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