Cantilever concrete structure with stay cables and method for construction thereof

Abstract

The application discloses a cantilever concrete structure with a cable-stayed cable and a construction method thereof, and belongs to the technical field of building construction. The cantilever concrete structure with a cable-stayed cable comprises a building main body, a cantilever concrete structure and a cable. The cable comprises a cable body mounting seat. The mounting seat comprises a hollow base, and the internal regions of the base are exposed to the building main body and the cantilever concrete structure. A mounting sleeve is coaxially arranged in the base. A mounting cavity coaxial with the mounting sleeve is arranged on the sidewall of the base. A plurality of connecting discs extending into the mounting cavity are coaxially arranged on the peripheral side of the mounting sleeve. A plurality of radial adjusting structures for moving the mounting sleeve along the radial direction of the base are arranged between the connecting discs and the mounting cavity. A supporting sleeve for connecting the cable body is coaxially arranged on the mounting sleeve. The supporting sleeve and the mounting sleeve are provided with a vertical adjusting structure for adjusting the perpendicularity of the supporting sleeve. The end of the cable body is connected with the corresponding supporting sleeve. The application aims to solve the problem that the internal force of the cable changes and cannot be adjusted after the temporary support of the cantilever concrete structure with a cable-stayed cable is unloaded.

Description

Technical Field

[0001] This invention belongs to the field of building construction technology, specifically relating to a cantilevered concrete structure with cable stays and its construction method. Background Technology

[0002] Cantilever structures are widely used in architecture, commonly seen in eaves, balconies, stadium grandstand roofs, train station platform roofs, and theater platforms. As a highly efficient structural component, cable-stayed structures, through tensioning and suspension, can create a multitude of highly creative architectural effects when combined with cantilever structures. However, current construction of cable-stayed cantilever structures requires temporary supports during pouring and pre-embedded cable sleeves; after the temporary supports are unloaded, the cantilever structure undergoes significant deformation, easily causing changes in cable tension and even discrepancies with design requirements. Summary of the Invention

[0003] In view of this, the present invention discloses a cantilevered concrete structure with inclined cables and its construction method, the purpose of which is to solve the problem that the internal force of the inclined cables changes and cannot be adjusted after the temporary support is unloaded in the cantilevered concrete structure with inclined cables.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A cantilevered concrete structure with cable stays includes a main building, a cantilevered concrete structure, and cables disposed between the two. Each cable includes a cable body and mounting bases embedded in the main building and the cantilevered concrete structure. Each mounting base includes a hollow base, with the interior area of ​​the base exposed above the main building and the cantilevered concrete structure. A mounting sleeve is coaxially disposed inside the base, and a coaxial mounting cavity is provided on the inner sidewall of the base. Several connecting discs extending into the mounting cavity are coaxially disposed around the periphery of the mounting sleeve. Several radial adjustment structures for moving the mounting sleeve radially along the base are provided between the connecting discs and the mounting cavity. A support sleeve for connecting the cable body is coaxially disposed inside the mounting sleeve, and a vertical adjustment structure for adjusting the verticality of the support sleeve is provided between the support sleeve and the mounting sleeve. The end of the cable body is connected to a corresponding support sleeve, and the end of the support sleeve is provided with a tensioning and fixing device for tensioning and fixing the cable body.

[0006] In this scheme, the mounting base is pre-embedded during the pouring of the main building structure and the cantilever structure. After the concrete curing of the cantilever structure is completed, the temporary support is unloaded. At this time, the cantilever structure deforms due to stress changes, causing the mounting base to deviate from the design requirements. Then, the mounting sleeve is moved radially along the base by a radial adjustment structure, and the mounting sleeve drives the support sleeve to move synchronously, thereby adjusting the radial position of the support sleeve. Then, the vertical adjustment structure is used to adjust the perpendicularity of the support sleeve relative to the mounting sleeve, thereby adjusting the verticality of the support sleeve so that the position of the support sleeve meets the design requirements, and then the cable is installed and tensioned. This scheme can correct the deviation caused by the change in cable force due to stress changes, and can also make up for the error caused by the base installation error.

[0007] Furthermore, the radial adjustment structure includes a telescopic connector. One end of the connector is hinged to the side wall of the connecting disc, and the other end of the connector is fixed with a connecting shaft. The upper and lower ends of the connecting shaft are rotatably connected to the mounting cavity, and a limit gear is provided at the end of the connecting shaft. An annular block is coaxially arranged in the mounting cavity and slidably connected to the connecting shaft. The inner diameter of the annular block is larger than the outer diameter of the limit gear, and several tooth grooves corresponding to the limit gear are formed on the annular block. A sliding groove communicating with the mounting cavity is formed at the end of the base, and a connecting rod rotatably connected to the annular block is threaded in the sliding groove.

[0008] When radial adjustment is required, the connecting rod is rotated. As the connecting rod moves upward, it simultaneously moves the annular block, causing the limiting gear to disengage from the tooth groove. At this point, the connecting shaft can rotate relative to the ring. Through the extension and retraction of the connecting parts and the rotation of the connecting shaft, the mounting sleeve and connecting plate can move radially along the base. Once adjusted to the correct position, simply rotate the connecting rod in the opposite direction. The connecting rod drives the annular block to reset, causing the limiting gear to mesh with the tooth groove, thus restricting the rotation of the connecting shaft. This, in turn, restricts the connection between the connecting plate and the mounting sleeve via the connecting parts. The entire radial adjustment process is simple and quick.

[0009] Furthermore, the vertical adjustment structure includes a spherical adjustment ball with a coaxial through groove, the adjustment ball being fitted and fixed to the outer wall of the support sleeve; the inner wall of the mounting sleeve has a spherical cavity that mates with the adjustment ball; both ends of the mounting sleeve are provided with annular locking blocks, the locking blocks being used to lock the adjustment ball, the end face of the locking block matching the shape of the adjustment ball; the locking blocks are fitted onto the support sleeve, and the inner diameter of the locking blocks is larger than the outer diameter of the support sleeve; the inner wall of the mounting sleeve has several parallel positioning grooves, a screw is coaxially rotatably connected in the positioning groove, and a connecting block threadedly connected to the screw is slidably disposed in the positioning groove, the connecting block being connected to the outer wall of the locking block.

[0010] When the verticality of the support sleeve needs to be adjusted, rotate the screw forward. The screw, through the connecting block, drives the locking block away from the adjusting ball, allowing the adjusting ball to rotate. At this time, the adjustment degree of the support sleeve can be adjusted simply by deflecting the support sleeve. After the verticality is adjusted to the correct position, rotate the screw in the opposite direction. The screw, through the connecting block, drives the locking block closer to the adjusting ball until the adjusting ball is clamped and fixed, restricting the rotation of the adjusting ball, thereby fixing the support sleeve.

[0011] Furthermore, the connecting member includes a fixed rod and a movable rod that is slidably connected to the fixed rod on the same axis. The opposite end of the fixed rod is fixedly connected to the connecting shaft, and the opposite end of the movable rod is hinged to the side wall of the connecting disc. The movable rod is provided with several limiting holes. A U-shaped sliding cover is provided between the fixed rod and the annular block. The two sides of the sliding cover are slidably connected to the side wall of the fixed rod. A supporting elastic element is provided between the sliding cover and the fixed rod. Several limiting rods corresponding to the limiting holes are provided on the end of the sliding cover away from the connecting shaft.

[0012] When radial adjustment is performed, the ring block moves upward via the connecting rod, at which point the ring block stops pressing the sliding cover. The sliding cover moves upward under the action of the supporting elastic element, causing the sliding cover to move synchronously with the limiting rod, disengaging the limiting rod from the limiting hole. At this time, the moving rod can slide relative to the fixed rod, allowing the connecting plate to move radially. After adjustment, the ring block resets and presses the sliding cover, causing the limiting rod on the sliding cover to insert into the corresponding limiting hole, restricting the sliding of the moving rod relative to the fixed rod, thus restricting the extension and retraction of the connecting part, and consequently restricting the movement of the connecting plate. This enhances the stability of the connecting plate, thereby increasing the stability of the stay cable.

[0013] Furthermore, the outer side of the support sleeve is ball-jointed with several diagonal braces, and the other end of the diagonal braces is ball-jointed with several slide blocks; the end face of the locking block is provided with several grooves facing its axis, the slide blocks are slidably connected with the corresponding grooves, and a locking pin is provided between the slide blocks and the grooves to restrict the sliding of the slide blocks.

[0014] When adjusting the verticality, the locking pin is lowered, and when the support sleeve deflects, it drives the slide block to slide relative to it through the diagonal brace. After the adjustment is completed, the locking pin is reset to restrict the slide block, and the slide block supports and restricts the support sleeve through the diagonal brace to prevent the support sleeve from deflecting during use, which would cause changes in the stress of the cable and affect the safety of the cantilever structure.

[0015] Furthermore, the outer wall of the adjusting ball is provided with several locking holes; the locking block is provided with several annular grooves inside, and an annular airbag is provided in the annular grooves; the end face of the locking block facing the adjusting ball is provided with several connecting holes communicating with the annular grooves, and a locking rod connected to the airbag is slidably provided in each of the connecting holes.

[0016] In this design, when the locking block needs to disengage from the adjusting ball, the gas inside the airbag is released, and the airbag drives the locking rod to disengage from the locking hole, at which point the adjusting ball can deflect freely. When the locking block clamps and fixes the adjusting ball, the airbag is inflated, and the airbag pushes the locking rod into the locking hole, restricting the rotation of the adjusting ball, thereby strengthening the fixing strength of the adjusting ball, that is, improving the fixing strength of the support sleeve.

[0017] A construction method for a cantilevered concrete structure with cable stays includes the following steps:

[0018] 1) Cantilever Structure Casting: Install temporary supports and formwork, and pre-embed the base of one end of the cable body in the cantilever structure, and then cast and cure it; at the same time, install the base of the other end of the cable body in the main building structure; at this time, the internal area of ​​the base, the fixing sleeve, and the end of the support sleeve are exposed in the main building structure and the cantilever concrete structure, and the connecting rod is treated without bonding; after curing, install the cable body and use a tensioning and fixing device to fix the cable body under tension;

[0019] 2) Radial Adjustment: Remove the temporary support and adjust if the cable tension changes; rotate the connecting rod forward, and the connecting rod moves upward, causing the annular block to move synchronously, so that the limiting gear disengages from the tooth groove. At this time, the connecting shaft can rotate relative to the fixed rod; when the annular block moves upward, it stops pressing the sliding cover, and the sliding cover moves upward under the action of the support elastic element, so that the sliding cover drives the limiting rod to move synchronously, so that the limiting rod disengages from the limiting hole. At this time, the moving rod can slide relative to the fixed rod; at this time, move the connecting plate radially, and the connecting plate drives the support sleeve to move synchronously through the fixed sleeve, thereby adjusting the radial position of the support sleeve; after the adjustment is completed, rotate the connecting rod in the reverse direction, and the connecting rod drives the annular block to reset, so that the limiting gear meshes with the tooth groove; when the annular block resets, it presses the sliding cover, so that the limiting rod on the sliding cover inserts into the corresponding limiting hole, restricting the sliding of the moving rod relative to the fixed rod, thereby restricting the movement of the connecting plate and fixing the support sleeve;

[0020] 3) Verticality Adjustment: After dismantling the temporary support, adjust if the cable tension changes; expel the gas from the airbag, the airbag will cause the locking rod to disengage from the locking hole, and simultaneously rotate all the screws in the forward direction. The screws, through the connecting block, will cause the locking block to move away from the adjusting ball, allowing the adjusting ball to rotate. At this point, simply deflect the support sleeve to adjust its verticality; once the verticality is adjusted to the correct position, rotate the screws in the reverse direction. The screws, through the connecting block, will cause the locking block to move closer to the adjusting ball until the adjusting ball is clamped and fixed; inflate the airbag, which will push the locking rod into the locking hole, restricting the rotation of the adjusting ball and thus fixing the support sleeve.

[0021] 4) Tensioning and fixing: The tension of the cable body is re-fixed using a tensioning and fixing device.

[0022] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0023] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration:

[0024] Figure 1 This is a schematic diagram of the cantilever structure in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the cable structure in an embodiment of the present invention;

[0026] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0027] Figure 4 for Figure 2 Enlarged diagram of point B in the middle.

[0028] The following are the markings in the attached diagram: 1. Main building structure; 2. Cantilevered concrete structure; 3. Base; 4. Cable; 5. Installation sleeve; 6. Support sleeve; 7. Connecting plate; 8. Tensioning and fixing device; 9. Connecting shaft; 10. Ring block; 11. Limiting gear; 12. Tooth groove; 13. Connecting rod; 14. Adjusting ball; 15. Locking block; 16. Screw; 17. Connecting block; 18. Fixing rod; 19. Moving rod; 20. Limiting hole; 21. Sliding cover; 22. Support elastic element; 23. Limiting rod; 24. Diagonal brace; 25. Sliding seat; 26. Locking rod; 27. Airbag. Detailed Implementation

[0029] like Figures 1-4 As shown:

[0030] A cantilevered concrete structure with cable stays includes a main building 1, a cantilevered concrete structure 2, and cables disposed between the two. The cables include cable bodies 4 and mounting bases embedded in the main building 1 and the cantilevered concrete structure 2. Each mounting base includes a hollow base 3, with the interior area of ​​the base 3 exposed above the main building 1 and the cantilevered concrete structure 2. A mounting sleeve 5 is coaxially disposed inside the base 3, and a coaxial mounting cavity is provided on the inner sidewall of the base 3. Several connecting discs 7 are coaxially disposed around the periphery of the mounting sleeve 5, extending into the mounting cavity. A plurality of radial adjustment structures are provided between the mounting sleeve 5 and the mounting cavity for moving the mounting sleeve 5 radially along the base 3; a support sleeve 6 for connecting the cable body 4 is coaxially provided inside the mounting sleeve 5, and a vertical adjustment structure for adjusting the verticality of the support sleeve 6 is provided between the support sleeve 6 and the mounting sleeve 5; the end of the cable body 4 is connected to the corresponding support sleeve 6, and the end of the support sleeve 6 is provided with a tensioning and fixing device 8 for tensioning and fixing the cable body 4. The tensioning and fixing device 8 for tensioning and fixing the cable body 4 is a conventional technical means for those skilled in the art, so it is not described in detail.

[0031] In this scheme, the mounting base is pre-embedded during the pouring of the main building 1 and the cantilever structure. After the cantilever structure has been cured, the temporary support is unloaded. At this time, the cantilever structure deforms due to stress changes, causing the mounting base to deviate from the design requirements. Then, the mounting sleeve 5 is moved radially along the base 3 by the radial adjustment structure. The mounting sleeve 5 drives the support sleeve 6 to move synchronously, thereby adjusting the radial position of the support sleeve 6. Then, the vertical adjustment structure is used to adjust the verticality of the support sleeve 6 relative to the mounting sleeve 5, thereby adjusting the verticality of the support sleeve 6 so that the position of the support sleeve meets the design requirements. Then, the cable 4 is installed and tensioned. This scheme can correct the deviation caused by the change in cable force due to stress changes, and also make up for the error caused by the installation error of the base 3.

[0032] In this embodiment, the radial adjustment structure includes a telescopic connector. One end of the connector is hinged to the side wall of the connecting disc 7, and the other end of the connector is fixed with a connecting shaft 9. The upper and lower ends of the connecting shaft 9 are rotatably connected to the mounting cavity. A limiting gear 11 is provided at the end of the connecting shaft 9. An annular block 10 is coaxially arranged in the mounting cavity and slidably connected to the connecting shaft 9. The inner diameter of the annular block 10 is larger than the outer diameter of the limiting gear 11. A plurality of toothed grooves 12 corresponding to the limiting gear 11 are opened on the annular block 10. A sliding groove communicating with the mounting cavity is opened at the end of the base 3. A connecting rod 13 rotatably connected to the annular block 10 is threaded in the sliding groove.

[0033] When radial adjustment is required, the connecting rod 13 is rotated. As the connecting rod 13 moves upward, it simultaneously moves the annular block 10, causing the limiting gear 11 to disengage from the tooth groove 12. At this point, the connecting shaft 9 can rotate relative to the connecting rod. Through the extension and retraction of the connecting parts and the rotation of the connecting shaft 9, the mounting sleeve 5 and the connecting plate 7 can move radially along the base 3. After adjustment, simply rotate the connecting rod 13 in the opposite direction. The connecting rod 13 drives the annular block 10 to reset, causing the limiting gear 11 to mesh with the tooth groove 12, thus restricting the rotation of the connecting shaft 9. This, in turn, restricts the connection between the connecting plate 7 and the mounting sleeve 5 through the connecting parts. The entire radial adjustment process is simple and quick.

[0034] In this embodiment, the vertical adjustment structure includes a spherical adjustment ball 14, on which a coaxial through groove is formed. The adjustment ball 14 is sleeved on the outer wall of the support sleeve 6 and welded to it. A spherical cavity is integrally formed on the inner wall of the mounting sleeve 5, and the adjustment ball 14 is rotatably connected to the spherical cavity. Both ends of the mounting sleeve 5 are provided with annular locking blocks 15, which are used to lock the adjustment ball 14. The end face of the locking block 15 matches the shape of the adjustment ball 14. The locking block 15 is sleeved on the support sleeve 6, and the inner diameter of the locking block 15 is larger than the outer diameter of the support sleeve 6. The inner wall of the mounting sleeve 5 is provided with several parallel positioning grooves. A screw 16 is coaxially rotatably connected in the positioning groove. A connecting block 17 threadedly connected to the screw 16 is slidably arranged in the positioning groove. The connecting block 17 is connected to the outer wall of the locking block 15.

[0035] When the verticality of the support sleeve 6 needs to be adjusted, the screw 16 is rotated forward. The screw 16 drives the locking block 15 away from the adjusting ball 14 through the connecting block 17, allowing the adjusting ball 14 to rotate. At this time, the adjustment degree of the support sleeve 6 can be adjusted simply by deflecting the support sleeve 6. After the verticality is adjusted to the correct position, the screw 16 is rotated in the opposite direction. The screw 16 drives the locking block 15 closer to the adjusting ball 14 through the connecting block 17 until the adjusting ball 14 is clamped and fixed, restricting the rotation of the adjusting ball 14, thereby fixing the support sleeve 6.

[0036] In this embodiment, the connector includes a fixed rod 18 and a movable rod 19 that is slidably connected to the fixed rod 18 on the same axis. The opposite end of the fixed rod 18 is welded and fixed to the connecting shaft 9, and the opposite end of the movable rod 19 is hinged to the side wall of the connecting disc 7. The movable rod 19 is provided with a plurality of limiting holes 20. A sliding cover 21 is provided between the fixed rod 18 and the annular block 10. The longitudinal section of the sliding cover 21 is U-shaped. The two sides of the sliding cover 21 are slidably connected to the side wall of the fixed rod 18. A supporting elastic element 22 is provided between the sliding cover 21 and the fixed rod 18. A plurality of limiting rods 23 corresponding to the limiting holes 20 are provided on the end of the sliding cover 21 away from the connecting shaft 9.

[0037] When radial adjustment is performed, the ring block 10 moves upward via the connecting rod 13, at which point the ring block 10 stops pressing the sliding cover 21. The sliding cover 21 moves upward under the action of the supporting elastic element 22, causing the sliding cover 21 to move synchronously with the limiting rod 23, disengaging the limiting rod 23 from the limiting hole 20. At this time, the moving rod 19 can slide relative to the fixed rod 18, allowing the connecting plate 7 to move radially. After adjustment, the ring block 10 resets while pressing the sliding cover 21, causing the limiting rod 23 on the sliding cover 21 to insert into the corresponding limiting hole 20, restricting the sliding of the moving rod 19 relative to the fixed rod 18, thus restricting the extension and retraction of the connecting member, and consequently restricting the movement of the connecting plate 7, thereby enhancing the stability of the connecting plate 7, i.e., increasing the stability of the cable stay.

[0038] In this embodiment, the outer side of the support sleeve 6 is ball-jointed with several diagonal braces 24, and the other end of the diagonal braces 24 is ball-jointed with several slide blocks 25; the end face of the locking block 15 is provided with several grooves facing its axis, the slide block 25 is slidably connected to the corresponding groove, and a locking pin for limiting the sliding of the slide block 25 is provided between the slide block 25 and the groove (a common technical means used by those skilled in the art, so it is not shown in the figure).

[0039] When adjusting the verticality, the locking pin is lowered, and when the support sleeve 6 deflects, it drives the slide block 25 to slide relative to it through the diagonal brace 24. After the adjustment is completed, the locking pin is reset to restrict the slide block 25, and the slide block 25 supports and restricts the support sleeve 6 through the diagonal brace 24 to prevent the support sleeve 6 from deflecting during use, which would cause the stress of the cable to change and affect the safety of the cantilever structure.

[0040] In this embodiment, the outer wall of the adjusting ball 14 is provided with a plurality of locking holes; the locking block 15 is provided with a plurality of annular grooves, and an annular airbag 27 is provided in the annular grooves; the end face of the locking block 15 facing the adjusting ball 14 is provided with a plurality of connecting holes communicating with the annular grooves; and a locking rod 26 connected to the airbag 27 is slidably provided in each of the connecting holes.

[0041] In this scheme, when the locking block 15 needs to disengage from the adjusting ball 14, the gas in the airbag 27 is discharged, and the airbag 27 drives the locking rod 26 to disengage from the locking hole. At this time, the adjusting ball 14 can deflect freely. When the locking block 15 clamps and fixes the adjusting ball 14, the airbag 27 is inflated, and the airbag 27 pushes the locking rod 26 into the locking hole, restricting the rotation of the adjusting ball 14, thereby strengthening the fixing strength of the adjusting ball 14, that is, improving the fixing strength of the support sleeve 6.

[0042] A construction method for a cantilevered concrete structure with cable stays includes the following steps:

[0043] 1) Cantilever structure casting: Install temporary supports and formwork, and pre-embed the base 3 at one end of the cable body 4 in the cantilever structure, and carry out casting and curing; at the same time, install the base 3 at the other end of the cable body 4 in the main building 1; at this time, the internal area of ​​the base 3, the fixing sleeve and the end of the support sleeve 6 are exposed in the main building 1 and the cantilever concrete structure 2, and the connecting rod 13 is treated without bonding; after curing, install the cable body 4, and use the tension fixing device 8 to fix the cable body 4 with tension;

[0044] 2) Radial adjustment: Remove the temporary support and adjust if the cable force changes; rotate the connecting rod 13 in the forward direction. As the connecting rod 13 moves upward, it drives the annular block 10 to move synchronously, causing the limiting gear 11 to disengage from the tooth groove 12. At this time, the connecting shaft 9 can rotate relative to the limit. When the annular block 10 moves upward, it stops pressing the sliding cover 21. Under the action of the supporting elastic element 22, the sliding cover 21 moves upward, causing the limiting rod 23 to move synchronously, causing the limiting rod 23 to disengage from the limiting hole 20. At this time, the moving rod 19 can be relatively fixed. The rod 18 slides relative to the fixed rod 18. At this time, the connecting plate 7 moves radially, and the connecting plate 7 drives the support sleeve 6 to move synchronously through the fixed sleeve, thereby adjusting the radial position of the support sleeve 6. After the adjustment is completed, the connecting rod 13 is rotated in the opposite direction, and the connecting rod 13 drives the annular block 10 to reset, so that the limiting gear 11 meshes with the tooth groove 12. At the same time as the annular block 10 resets, it presses the sliding cover 21, so that the limiting rod 23 on the sliding cover 21 is inserted into the corresponding limiting hole 20, which restricts the sliding of the moving rod 19 relative to the fixed rod 18, thereby restricting the movement of the connecting plate 7 and fixing the support sleeve 6.

[0045] 3) Verticality Adjustment: After dismantling the temporary support, if the cable force changes, adjustment is required. The gas inside the airbag 27 is released, causing the airbag 27 to disengage the locking rod 26 from the locking hole. Simultaneously, all screws 16 are rotated forward. The screws 16, through the connecting block 17, move the locking block 15 away from the adjusting ball 14, allowing the adjusting ball 14 to rotate. At this point, only the support sleeve 6 needs to be deflected to adjust its verticality. Once the verticality is adjusted, the screws 16 are rotated in the opposite direction. The screws 16, through the connecting block 17, move the locking block 15 closer to the adjusting ball 14 until the adjusting ball 14 is clamped and fixed. The airbag 27 is then inflated, pushing the locking rod 26 into the locking hole, restricting the rotation of the adjusting ball 14, thereby fixing the support sleeve 6.

[0046] 4) Tensioning and fixing: The tensioning and fixing device 8 is used to re-fix the cable body 4 with tension.

[0047] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A cantilevered concrete structure with cable stays, comprising a main building body, a cantilevered concrete structure, and cables disposed between the two, characterized in that: The cable includes a cable body and an installation base embedded in the main building structure and the cantilevered concrete structure. The installation base includes a hollow base, with the interior area of ​​the base exposed above the main building structure and the cantilevered concrete structure. An installation sleeve is coaxially arranged inside the base, and a coaxial installation cavity is provided on the inner side wall of the base. Several connecting discs extending into the installation cavity are coaxially arranged around the periphery of the installation sleeve. Several radial adjustment structures for moving the installation sleeve radially along the base are provided between the connecting discs and the installation cavity. A support sleeve for connecting the cable body is coaxially arranged inside the installation sleeve. A vertical adjustment structure for adjusting the verticality of the support sleeve is provided between the support sleeve and the installation sleeve. The end of the cable body is connected to the corresponding support sleeve, and the end of the support sleeve is provided with a tensioning and fixing device for tensioning and fixing the cable body.

2. The cantilevered concrete structure with cable stays according to claim 1, characterized in that: The radial adjustment structure includes a telescopic connector. One end of the connector is hinged to the side wall of the connecting disc, and the other end of the connector is fixed with a connecting shaft. The upper and lower ends of the connecting shaft are rotatably connected to the mounting cavity, and a limit gear is provided at the end of the connecting shaft. An annular block is coaxially arranged in the mounting cavity and slidably connected to the connecting shaft. The inner diameter of the annular block is larger than the outer diameter of the limit gear, and several tooth grooves corresponding to the limit gear are formed on the annular block. A sliding groove communicating with the mounting cavity is formed at the end of the base, and a connecting rod rotatably connected to the annular block is threaded in the sliding groove.

3. A cantilevered concrete structure with cable stays according to claim 2, characterized in that: The vertical adjustment structure includes a spherical adjustment ball with a coaxial through groove, which is fitted and fixed to the outer wall of the support sleeve. The inner wall of the mounting sleeve has a spherical cavity that mates with the adjustment ball. Both ends of the mounting sleeve have annular locking blocks for locking the adjustment ball, with the end face of the locking block matching the shape of the adjustment ball. The locking blocks are fitted onto the support sleeve, and their inner diameter is larger than the outer diameter of the support sleeve. The inner wall of the mounting sleeve has several parallel positioning grooves, with a screw rotatably connected coaxially within each groove. A connecting block, threadedly connected to the screw, is slidably disposed within each groove and connected to the outer wall of the locking block.

4. A cantilevered concrete structure with cable stays according to claim 3, characterized in that: The connector includes a fixed rod and a movable rod that is slidably connected to the fixed rod on the same axis. The opposite end of the fixed rod is fixedly connected to the connecting shaft, and the opposite end of the movable rod is hinged to the side wall of the connecting plate. The movable rod has several limiting holes. A U-shaped sliding cover is provided between the fixed rod and the annular block. The two sides of the sliding cover are slidably connected to the side wall of the fixed rod. A supporting elastic element is provided between the sliding cover and the fixed rod. Several limiting rods corresponding to the limiting holes are provided on the end of the sliding cover away from the connecting shaft.

5. A cantilevered concrete structure with cable stays according to claim 4, characterized in that: The outer side of the support sleeve is ball-jointed with several diagonal braces, and the other end of the diagonal braces is ball-jointed with several slide blocks; the end face of the locking block is provided with several grooves facing its axis, the slide blocks are slidably connected with the corresponding grooves, and a locking pin is provided between the slide blocks and the grooves to limit the sliding of the slide blocks.

6. A cantilevered concrete structure with cable stays according to claim 5, characterized in that: The outer wall of the adjusting ball is provided with several locking holes; the inside of the locking block is provided with several annular grooves, and an annular airbag is provided in the annular grooves. Several connecting holes communicating with the annular grooves are opened on the end face of the locking block facing the adjusting ball. A locking rod connected to the airbag is slidably provided in each of the connecting holes.

7. The construction method of a cantilevered concrete structure with cable stays according to claim 6, characterized in that, Includes the following steps: 1) Cantilever Structure Casting: Install temporary supports and formwork, and pre-embed the base of one end of the cable body in the cantilever structure, and then cast and cure it; at the same time, install the base of the other end of the cable body in the main building structure; at this time, the internal area of ​​the base, the fixing sleeve, and the end of the support sleeve are exposed in the main building structure and the cantilever concrete structure, and the connecting rod is treated without bonding; after curing, install the cable body and use a tensioning and fixing device to fix the cable body under tension; 2) Radial Adjustment: Remove the temporary support and adjust if the cable tension changes; rotate the connecting rod forward, and the connecting rod moves upward, causing the annular block to move synchronously, so that the limiting gear disengages from the tooth groove. At this time, the connecting shaft can rotate relative to the fixed rod; when the annular block moves upward, it stops pressing the sliding cover, and the sliding cover moves upward under the action of the support elastic element, so that the sliding cover drives the limiting rod to move synchronously, so that the limiting rod disengages from the limiting hole. At this time, the moving rod can slide relative to the fixed rod; at this time, move the connecting plate radially, and the connecting plate drives the support sleeve to move synchronously through the fixed sleeve, thereby adjusting the radial position of the support sleeve; after the adjustment is completed, rotate the connecting rod in the reverse direction, and the connecting rod drives the annular block to reset, so that the limiting gear meshes with the tooth groove; when the annular block resets, it presses the sliding cover, so that the limiting rod on the sliding cover inserts into the corresponding limiting hole, restricting the sliding of the moving rod relative to the fixed rod, thereby restricting the movement of the connecting plate and fixing the support sleeve; 3) Verticality Adjustment: After dismantling the temporary support, adjust if the cable tension changes; expel the gas from the airbag, the airbag will cause the locking rod to disengage from the locking hole, and simultaneously rotate all the screws in the forward direction. The screws, through the connecting block, will cause the locking block to move away from the adjusting ball, allowing the adjusting ball to rotate. At this point, simply deflect the support sleeve to adjust its verticality; once the verticality is adjusted to the correct position, rotate the screws in the reverse direction. The screws, through the connecting block, will cause the locking block to move closer to the adjusting ball until the adjusting ball is clamped and fixed; inflate the airbag, which will push the locking rod into the locking hole, restricting the rotation of the adjusting ball and thus fixing the support sleeve. 4) Tensioning and fixing: The tension of the cable body is re-fixed using a tensioning and fixing device.

Images