Prestressed concrete double-ball-head connecting rod

Abstract

The utility model discloses a prestressed concrete double-ball-head connecting rod which comprises a rod body, a ball body, an anchoring sleeve and a spherical sliding plate. The two balls are fixed to the two ends of the rod body in a one-to-one correspondence mode to form a double-ball-head connecting rod, and a prestressing tendon is arranged in the axial direction of the double-ball-head connecting rod. The anchoring sleeve is sleeved on the outer surface of the ball body and the rod wall of the end part of the rod body; and the spherical sliding plate is embedded between the outer surface of the sphere and the inner wall surface of the anchoring sleeve. A sliding surface is arranged between the sphere and the anchoring sleeve to form a spherical hinge structure, so that the large-displacement requirement of the structure is met; concrete is adopted as a main body material, and measures of applying prestress, strengthening anti-corrosion protection and the like are combined to ensure the long-term reliability in a corrosion environment; the structural strength is strengthened by applying prestress to the double-ball-head connecting rod, so that the double-ball-head connecting rod has high-strength bearing capacity and can adapt to large displacement and bear complex stress.

Description

Technical Field

[0001] The utility model relates to the technical field of underwater floating tunnel restraint structures, and more specifically to a prestressed concrete double-ball head connecting rod. Background Art

[0002] An underwater floating tunnel is a large-scale cross-sea transportation structure suspended in water. The key to its construction is how to properly solve the problem of constrained structure. The floating tunnel must meet the requirements of structural stability under the complex dynamic system of waves and tides, and ensure the structural safety of the structure under various loads (including earthquakes, submarine collisions, heavy pressure from sunken ships, etc.).

[0003] The marine environment has extremely high requirements for the corrosion resistance of structures. Certain components of the constraint structure of the submarine suspended tunnel need to bear both tension and pressure. For long continuous tunnels, they must also be able to adapt to the large displacement and expansion deformation of the tunnel. The underwater environment determines that these structures are difficult to replace after they are built.

[0004] Therefore, finding a suitable constraint structure for the underwater floating tunnel so that it can adapt to the various stringent requirements of the underwater floating tunnel is a technical problem that technical personnel in this field need to solve urgently. Utility Model Content

[0005] In view of this, the utility model provides a prestressed concrete double ball head connecting rod, which combines the monk head connection commonly used in machinery with the prestressing technology in civil engineering to obtain a structural rod that can adapt to large displacements, withstand complex forces, and have excellent corrosion resistance, meeting the needs of underwater suspended tunnel environments and constraint structures.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A prestressed concrete double ball head connecting rod, comprising:

[0008] Rod body,

[0009] A sphere, wherein two spheres are fixed to the two ends of the rod body in a one-to-one correspondence to form a double-ball connecting rod, and a prestressed beam is arranged along the axial direction of the double-ball connecting rod;

[0010] An anchor sleeve, the anchor sleeve is sleeved on the outer surface of the sphere;

[0011] A spherical slide plate is embedded between the outer surface of the sphere and the inner wall surface of the anchor sleeve.

[0012] The beneficial effect of the above technical solution is that a spherical slide plate is provided between the sphere and the inner wall of the anchor sleeve, and a sliding surface is formed between the outer wall of the sphere and the inner wall of the spherical slide plate, so that a ball joint structure is formed between the sphere and the anchor sleeve. The universal rotation feature of the ball joint can adapt to the large displacement requirements of the structure, and the prestressed beam is used to strengthen the structural strength of the double ball head connecting rod, so that it has a high-strength bearing capacity. When the tunnel is subjected to loads such as gravity, buoyancy, and water pressure in uncertain directions, the double ball head connecting rod can ensure that the tunnel has sufficient rigidity in the horizontal and vertical directions.

[0013] Preferably, the sphere includes a spherical cap and an anchoring spherical cap, one end face of the spherical cap is fixedly connected to the end face of the rod body, and the anchoring spherical cap is fixedly covered on the other end face of the spherical cap relative to the rod body. The spherical cap and the spherical cap are prefabricated separately, and after the prestressing tensioning and grouting is completed, the anchoring spherical cap is covered on the end face of the spherical cap, and the rod body, the spherical cap, the anchoring spherical cap and the anchoring sleeve are connected into a whole by using prestressing.

[0014] Preferably, the number of the prestressed bundles is one or more, and the prestressed bundles sequentially penetrate the spherical cap and the rod body, and the ends of the prestressed bundles are anchored to the end surface of the spherical cap away from the rod body through anchors. The prestressed bundles are clamped by anchors, and the anchors can be connected to jacks to facilitate tensioning operations.

[0015] Preferably, a conical protective cover is sleeved on the rod wall of the rod body, the large end of the protective cover is fixedly connected to one end of the anchor sleeve, and the inner cavity of the protective cover is filled with anti-corrosion grease, thereby improving the anti-corrosion performance of the double ball head connecting rod.

[0016] Preferably, an annular outer edge is fixed to one end of the anchor sleeve near the rod body along its circumference, and the large end of the protective cover is fixedly connected to the outer wall of the annular outer edge; the inner wall surface of the anchor sleeve located at the end of the rod body is an inclined surface, and a receiving cavity is formed between the inclined surface and the rod wall of the rod body, and the receiving cavity is filled with the anti-corrosion grease. The anchor sleeve, the outer wall of the rod body and the inner wall of the protective cover are all filled with anti-corrosion grease, which can effectively ensure the anti-corrosion performance of the ball, can be used for a long time in the marine environment, and ensure the flexibility of the ball joint.

[0017] Preferably, a stainless steel plate is arranged on the outer surface of the sphere, and the spherical slide plate is arranged on the outer surface of the stainless steel plate. The interface between the steel plate and the spherical slide plate is used as a sliding surface, which can effectively ensure the flexibility of the ball joint rotation.

[0018] Preferably, the rod body, the spherical body and the anchor sleeve are all concrete structures. The rod body, the spherical cap, the anchoring spherical cap and the anchor sleeve are prefabricated separately for easy assembly, and are connected by prestressing after assembly for easy standardized production.

[0019] Preferably, the spherical slide plate is a polytetrafluoroethylene plate or a composite polytetrafluoroethylene plate. The polytetrafluoroethylene plate has extremely good corrosion resistance and can effectively ensure the mechanical properties of the double ball head connecting rod in water.

[0020] Preferably, the anchor sleeve is prefabricated in two pieces along the axis of the rod body. The anchor sleeve is prefabricated in two pieces, which is convenient for assembly and connection by prestressing.

[0021] It can be seen from the above technical solution that, compared with the prior art, the utility model discloses a prestressed concrete double ball head connecting rod, in which a sliding surface is provided between the ball and the anchor sleeve to form a ball joint structure, which can adapt to the large displacement requirements of the structure; it uses concrete as the main material, and combines measures such as applying prestress and strengthening anti-corrosion protection to ensure its long-term reliability in a corrosive environment; by applying prestress to the double ball head connecting rod to strengthen the structural strength, it has a high-strength bearing capacity and can adapt to large displacements and withstand complex forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 A cross-sectional view of a double ball head connecting rod provided by the utility model;

[0024] Figure 2 This is an exploded schematic diagram of the double ball head connecting rod provided by the utility model.

[0025] in,

[0026] 1-rod body; 2-sphere; 21-spherical crown; 22-anchoring ball cover; 3-prestressed beam; 31-anchor; 4-anchoring sleeve; 41-annular outer edge; 5-protective cover; 6-anti-corrosion grease; 7-spherical slide plate. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] See attached Figures 1-2The utility model discloses a prestressed concrete double ball head connecting rod, which combines the monk head connection commonly used in machinery with the prestressing technology in civil engineering to obtain a structural rod that can adapt to large displacement, withstand complex forces, and has excellent corrosion resistance, including:

[0029] Rod body 1,

[0030] The two balls 2 are fixed to the two ends of the rod body 1 one by one to form a double ball head connecting rod, and a prestressed beam 3 is arranged along the axial direction of the double ball head connecting rod;

[0031] An anchor sleeve 4, which is sleeved on the outer surface of the sphere 2;

[0032] The spherical slide plate 7 is embedded between the outer surface of the sphere 2 and the inner wall surface of the anchor sleeve 4.

[0033] In this embodiment, the sphere 2 includes a spherical cap 21 and an anchoring spherical cover 22 . One end surface of the spherical cap 21 is fixedly connected to the end surface of the rod body 1 , and the anchoring spherical cover 22 is fixedly covered on the other end surface of the spherical cap 21 opposite to the rod body 1 .

[0034] In this embodiment, the number of prestressed bundles 3 is one or more, and the prestressed bundles 3 sequentially penetrate the spherical cap 21 and the rod body 1 , and the ends of the prestressed bundles 3 are anchored to the end surface of the spherical cap 21 away from the rod body 1 through the anchors 31 .

[0035] In order to further optimize the above technical solution and facilitate the assembly of the double ball head connecting rod, the rod body, the ball crown and the anchor ball cover are prefabricated respectively, the rod body is provided with a prestressed channel along the axial direction, and the ball crown is provided with a through hole corresponding to the prestressed bundle. During installation, the prestressed steel bundle is passed through the rod body and the ball crowns at both ends, one of the end faces of the ball crown is fixed to the end face of the rod body, and an anchor is installed on the other end face of the ball crown. One part of the anchor is deeply inserted into the through hole of the ball crown, and the other part is exposed to the other end face of the ball crown, which is convenient for the installation of the tensioning jack; when the ball crowns at both ends of the rod body are installed, the double ball head connecting rod is tensioned at both ends, and the prestressed pipe is grouted after tensioning. After the grouting is completed, the anchor is sealed and the anchor ball cover is installed.

[0036] In order to further optimize the above technical solution and ensure that the end face of the anchoring ball cover is tightly fitted with the end face of the spherical crown, a groove is opened on the end face of the anchoring ball cover 22, and the protruding part of the anchor 31 is inserted into the groove, and the two opposite end faces of the anchoring ball cover 22 and the spherical crown 21 are fixed by bonding.

[0037] In this embodiment, a conical protective cover 5 is sleeved on the rod wall of the rod body 1 , the large end of the protective cover 5 is fixedly connected to one end of the anchor sleeve 4 , and the inner cavity of the protective cover 5 is filled with anti-corrosion grease 6 .

[0038] In order to further optimize the above technical solution, an annular outer edge 41 is fixed along the circumference of one end of the anchor sleeve 4 close to the rod body 1, and the large end of the protective cover 5 is fixedly connected to the outer wall of the annular outer edge 41; the inner wall surface of the anchor sleeve 4 located at the end of the rod body 1 is an inclined surface, and a accommodating cavity is formed between the inclined surface and the rod wall of the rod body 1, and the accommodating cavity is filled with anti-corrosion grease 6.

[0039] The anti-corrosion cover is buckled at the connection between the rod body and the anchor sleeve. The anti-corrosion cover is filled with anti-corrosion grease, which can improve the corrosion resistance of the ball, ensure the flexibility of the ball joint in the marine environment, and prevent corrosion failure.

[0040] In order to further optimize the above technical solution and further ensure the flexibility of the universal rotation of the ball joint, a stainless steel plate is arranged on the outer surface of the ball 2, and a spherical slide plate 7 is arranged on the outer surface of the stainless steel plate.

[0041] In this embodiment, the rod body 1, the sphere 2 and the anchor sleeve 4 are all concrete structures.

[0042] In order to further optimize the above technical solution and improve the corrosion resistance of the ball joint sliding surface, the spherical sliding plate 7 is a polytetrafluoroethylene plate.

[0043] In order to further optimize the above technical solution and facilitate the installation of the anchor sleeve on the sphere, the anchor sleeve 4 is prefabricated in two parts along the axis of the rod body 1 .

[0044] The anchor sleeves are made of two symmetrical pieces. When assembled, the two pieces are butted together to form the anchor sleeves. The prestressed parts are used for connection, so the assembly is convenient.

[0045] The double ball head connecting rod provided by the utility model can be supported between the bottom surface of the underwater floating tunnel and the pedestal. The floating tunnel is subjected to loads such as gravity, buoyancy, and water pressure of uncertain direction. The double ball head connecting rod can ensure that the tunnel has sufficient rigidity in the horizontal and vertical directions. The double ball head connecting rod can be used as a pier of the floating tunnel to ensure that the continuous length of the tunnel is very large and adapt to the large longitudinal expansion and contraction deformation of the tunnel. In addition, the marine environment is highly corrosive and it is difficult to replace the underwater structure after it is built. Therefore, the double ball head connecting rod has extremely strong corrosion resistance.

[0046] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0047] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A prestressed concrete double ball head connecting rod, characterized in that: include: Rod body (1), A sphere (2), wherein the spheres (2) are two and are fixed one-to-one to the two ends of the rod body (1) to form a double ball head connecting rod, and a prestressed beam (3) is provided along the axial direction of the double ball head connecting rod; An anchor sleeve (4), the anchor sleeve (4) being sleeved on the outer surface of the sphere (2); A spherical slide plate (7) is embedded between the outer surface of the sphere (2) and the inner wall surface of the anchor sleeve (4).

2. The prestressed concrete double ball connecting rod according to claim 1, characterized in that: The spherical body (2) comprises a spherical cap (21) and an anchoring spherical cover (22); one end face of the spherical cap (21) is fixedly connected to the end face of the rod body (1); and the anchoring spherical cover (22) is fixedly covered on the other end face of the spherical cap (21) opposite to the rod body (1).

3. The prestressed concrete double ball connecting rod according to claim 2, characterized in that: The number of the prestressed bundles (3) is one or more, and the prestressed bundles (3) sequentially penetrate the spherical cap (21) and the rod body (1), and the ends of the prestressed bundles (3) are anchored to the end surface of the spherical cap (21) away from the rod body (1) through anchors (31).

4. The prestressed concrete double ball connecting rod according to claim 1, characterized in that: A conical protective cover (5) is sleeved on the rod wall of the rod body (1), the large end of the protective cover (5) is fixedly connected to one end of the anchor sleeve (4), and the inner cavity of the protective cover (5) is filled with anti-corrosion grease (6).

5. The prestressed concrete double ball connecting rod according to claim 4, characterized in that: An annular outer edge (41) is fixedly provided along the circumference of one end of the anchor sleeve (4) close to the rod body (1), and the large end of the protective cover (5) is fixedly connected to the outer wall of the annular outer edge (41); the inner wall surface of the anchor sleeve (4) located at the end of the rod body (1) is an inclined surface, and a receiving cavity is formed between the inclined surface and the rod wall of the rod body (1), and the receiving cavity is filled with the anti-corrosion grease (6).

6. The prestressed concrete double ball connecting rod according to claim 1, characterized in that: A stainless steel plate is arranged in close contact with the outer surface of the sphere (2), and the spherical slide plate (7) is arranged in close contact with the outer surface of the stainless steel plate.

7. The prestressed concrete double ball connecting rod according to claim 1, characterized in that: The rod body (1), the sphere (2) and the anchor sleeve (4) are all concrete structures.

8. The prestressed concrete double ball connecting rod according to claim 1, characterized in that: The spherical slide plate (7) is a polytetrafluoroethylene plate or a composite polytetrafluoroethylene plate.

9. The prestressed concrete double ball connecting rod according to claim 1, characterized in that: The anchor sleeve (4) is prefabricated in two parts along the axis of the rod body (1).

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