Supporting device for prestress tension

Abstract

The utility model relates to the field of prestress tension, in particular to a supporting device for prestress tension, which comprises a first supporting part and a second supporting part which are connected with each other. The end, away from the connecting position of the first supporting part and the second supporting part, of the first supporting part and the end, away from the connecting position of the second supporting part and the first supporting part, of the second supporting part can be in lap joint with the two adjacent side edges of the chamfering face respectively, and the first supporting part and / or the second supporting part are / is provided with through holes / through holes. And the prestressed structural member can be connected with the forcing device through the through hole. By means of the device, under the condition that a cable bent tower body is not changed, a supporting face perpendicular to the stress application direction is provided at the cable bent tower chamfer, and the convenience and safety of prestress tensioning operation at the cable bent tower chamfer are improved.

Description

Technical Field

[0001] The utility model relates to the field of prestressed tensioning, in particular to a supporting device for prestressed tensioning. Background Art

[0002] Prestressing is a key step in bridge construction. Through prestressing, the strength and rigidity of the bridge's cables or suspenders can be improved, thereby improving the safety of the entire bridge structure. The cable tower is a tower-shaped structure in the bridge used to support the cables or suspenders. When prestressing the cables or suspenders, the jacks need to be supported on the cable tower.

[0003] During the construction process, due to practical needs, the tower body of the cable tower is often equipped with chamfers. When the support point of the prestressing operation is located at the chamfer of the cable tower, the direction of the prestressing is not perpendicular to the supporting surface at the chamfer, resulting in a lack of effective support for the jack.

[0004] The prior art generally adopts the following two methods to solve this problem:

[0005] Method 1: A protruding concrete tooth block is set at the prestressed tensioning operation support point located at the chamfer. The prestressed pipe vertically penetrates the surface of the tooth block. The jack is placed on the surface of the tooth block and connected to the prestressed tensioning structure. During operation, the direction of prestressing is perpendicular to the surface of the tooth block, thereby improving the stability of the jack support when performing prestressing tensioning operations at the chamfer.

[0006] Method 2: A plane is excavated at the support point of the prestressed tensioning operation at the chamfer. The prestressed pipe opening can vertically pass through the plane. The jack is placed on the plane and connected to the prestressed tensioning structure. During operation, the direction of prestressing is perpendicular to the plane, thereby improving the stability of the jack support when performing prestressed tensioning operations at the chamfer.

[0007] However, when prestressing is performed on the cable tower, dense supporting points need to be arranged. When using method 1, a large number of tooth blocks need to be produced. The production and maintenance cycle of the tooth blocks is long and they are difficult to fix. Therefore, method 1 has the problems of cumbersome construction process and long construction cycle, which affects the overall construction progress of the project.

[0008] Method 2 obtains an effective supporting surface through excavation, but it causes great damage to the structure of the cable tower and requires an additional construction period for excavating the supporting surface, which not only affects the structural stability of the bridge but also prolongs the construction period. Utility Model Content

[0009] The purpose of the utility model is to overcome the problems existing in the prior art that, when prestressing tensioning is carried out at the chamfer of the cable tower, it is necessary to obtain a supporting surface perpendicular to the prestressing tensioning direction by setting concrete teeth on the cable tower or excavating the surface of the cable tower, which makes the construction process complicated, prolongs the construction period and affects the stability of the bridge structure, and provides a supporting device for prestressing tensioning.

[0010] The utility model provides a support device for prestressed tensioning, comprising a first support portion and a second support portion, wherein the first support portion and the second support portion are used to provide a support surface perpendicular to the force direction of a force applying device at the chamfered surface of a cable tower, the first support portion and the second support portion are connected, and the position where the first support portion and the second support portion are connected is a connection point, an end of the first support portion away from the connection point with the second support portion and an end of the second support portion away from the connection point with the first support portion can be overlapped with two side edges adjacent to the chamfered surface respectively, the first support portion and / or the second support portion are respectively provided with through holes, and the prestressed structural member can be connected to the force applying device through the through holes.

[0011] The supporting device is placed at the chamfer of the cable tower so that the first supporting part and the second supporting part overlap the two side edges adjacent to the chamfered surface respectively; when in use, according to actual needs, the force-applying device can be set on the first supporting part or the second supporting part, so that the force-applying direction of the force-applying device is perpendicular to the surface where the first supporting part and the side edge of the chamfered surface are in contact or the surface where the second supporting part and the side edge of the chamfered surface are in contact. When the force-applying device applies force, the force-applying device drives the first supporting part or the second supporting part to abut against the cable tower, so that the position of the supporting device and the cable tower is relatively fixed. Through this setting, the force-applying device can be applied in a direction perpendicular to the contact surface between the first supporting part and the cable tower or in a direction perpendicular to the contact surface between the second supporting part and the cable tower. When force is applied, the first support part or the second support part becomes an effective support surface perpendicular to the force application direction, thereby avoiding changes to the tower body by using concrete teeth or excavation; by respectively providing through holes in the first support part and the second support part, the prestressed tensioning structure can be connected to the force applying device through the through holes. When in use, the force applying device can be mounted on the through holes of the first support part or the through holes of the second support part. The through holes of the first support part or the through holes of the second support part provide a mounting surface for installing the tensioning device. The tensioning device can be directly connected to the force applying device through the through holes, thereby improving the convenience and safety of prestressing tensioning operations at the chamfers of the tower.

[0012] Preferably, the force-applying device may be a jack or a tensioning machine.

[0013] Preferably, the support device for prestressed tensioning also includes a limiting portion, one side of the limiting portion is fixedly connected to the first supporting portion, and the other side is fixedly connected to the second supporting portion, the contact surface between the limiting portion and the chamfered surface can fit with the chamfered surface, and the limiting portion is used to limit the displacement of the support device.

[0014] When in use, the support device is placed at the chamfer of the cable tower, so that the first support part and the second support part are overlapped with the two side edges adjacent to the chamfered surface respectively, and the limiting part is in contact with the chamfered surface. When the force-applying device applies force, the support device is subjected to the force applied by the force-applying device, and has a tendency to displace around the chamfered surface. The limiting part is restricted by the contact with the chamfered surface, and one end of the limiting part abuts against the chamfered surface, generating a force in the opposite direction to the force applied by the force-applying device. At the same time, the contact surface between the limiting part and the chamfered surface will also generate a friction force in the opposite direction to the force applied by the force-applying device, thereby reducing the tendency of the support device to displace around the chamfered surface and improving the stability of the support device during prestressing tensioning operations.

[0015] Preferably, the limiting portion is a limiting plate, which is inscribed in the first supporting portion and the second supporting portion, the shape of the contact surface between the limiting plate and the chamfered surface depends on the shape of the chamfered surface, and the limiting plate can cover the planar area formed by the first supporting portion, the second supporting portion and the chamfered surface.

[0016] By setting the limiting part as a limiting plate, and making the limiting plate inscribed in the first support part and the second support part, the limiting plate plays a supporting role between the first support part and the second support part, and the bending resistance of the supporting device can be improved; by making the limiting plate cover the plane area formed by the first support part, the second support and the chamfered surface, the area of ​​the limiting plate inscribed in the first support part and the second support part is maximized. When subjected to the same force, the limiting plate with a larger area has less stress per unit area and is less likely to deform, thereby further improving the bending resistance of the supporting device.

[0017] Preferably, the limiting plate comprises a first limiting plate and a second limiting plate, and the first limiting plate and the second limiting plate are respectively arranged at upper and lower sides of the first supporting portion and the second supporting portion.

[0018] By providing the first limiting plate and the second limiting plate, the bending resistance of the supporting device can be further improved.

[0019] Preferably, the through hole may be oval, circular or rectangular.

[0020] Preferably, the supporting device further comprises a stiffening portion, and the stiffening portion is fixedly disposed on the first supporting portion and the second supporting portion.

[0021] By providing a stiffening portion on the support portion, the area of ​​the support portion can be further increased. When subjected to the same force, the stress per unit area of ​​the support portion is smaller and less likely to deform, thereby improving the bending resistance of the support device.

[0022] Preferably, the stiffening part is a stiffening bar, and the stiffening bar includes a first stiffening bar and a second stiffening bar, the first stiffening bar and the second stiffening bar are respectively fixedly arranged on the first support part and the second support part, the first stiffening bar is arranged along the length direction of the first support part, and the second stiffening bar is arranged along the length direction of the second support part.

[0023] By making the stiffening part into the first stiffening bar and the second stiffening bar in the shape of a strip, and the first stiffening bar and the second stiffening bar are respectively arranged along the length direction of the first support part and the second support part, and the first stiffening bar and the second stiffening bar respectively form a composite structure with the first support part and the second support part, when the first support part or the second support part is subjected to the force applied by the force-applying device, it can more effectively bear and transfer the load, make the stress distribution on the first support part or the second support part more uniform, reduce local stress concentration, and improve the bending resistance of the support device.

[0024] Preferably, the first stiffening bar is arranged on the outer side surface of the first supporting portion away from the through hole, and the second stiffening bar is arranged on the outer side surface of the second supporting portion away from the through hole.

[0025] By arranging the first stiffening bar and the second stiffening bar on the side away from the through hole, the obstruction of the through hole can be reduced, thus facilitating construction work.

[0026] Preferably, the supporting device further comprises a hoisting portion, and the hoisting portion is used to connect to the hoisting equipment.

[0027] By providing the hoisting part, it is convenient to hoist the supporting device through the hoisting part, thereby improving the convenience of using the supporting device.

[0028] Preferably, the hanging part is fixedly arranged on the top of the first supporting part and the second supporting part.

[0029] By setting the number of lifting parts and symmetrically setting them, when the supporting device is lifted by the lifting parts, the torque between the center of gravity of the supporting device and the lifting point is balanced, reducing the risk of tilting or flipping of the supporting device, thereby improving the safety of the lifting support device operation.

[0030] Compared with the prior art, the utility model has the following beneficial effects:

[0031] 1. The utility model provides a support device for prestressing. By setting the support device, the support device can provide a support surface perpendicular to the force direction at the chamfer of the cable tower without changing the cable tower body, thereby improving the convenience and safety of prestressing operation at the chamfer of the cable tower, and solving the problem that the prior art needs to obtain a support surface perpendicular to the prestressing direction by setting concrete teeth on the cable tower or excavating the surface of the cable tower, which leads to cumbersome construction process, long construction period and influence on the stability of the bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is the main schematic diagram of the support device for prestressing tensioning of Example 1 provided by the utility model.

[0033] Figure 2 This is a front schematic diagram of a support device for prestressing tensioning according to Example 1 provided by the utility model.

[0034] Figure 3 This is a side schematic diagram of a support device for prestressing tensioning according to Example 1 provided by the utility model.

[0035] Figure 4 This is a top view schematic diagram of a support device for prestressing tensioning according to Example 1 provided by the utility model.

[0036] Markings in the figure:

[0037] 11-first support part, 12-second support part, 2-limiting plate, 21-first limiting plate, 22-second limiting plate, 3-stiffening bar, 31-first stiffening bar, 32-second stiffening bar, 4-hoisting part, 5-cable tower DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0039] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0040] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the utility model.

[0041] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0042] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0043] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0044] Example 1

[0045] like Figure 1-4 As shown, a support device for prestressed tensioning includes a first support portion 11 and a second support portion 12, one side of the first support portion 11 and one side of the second support portion 12 are fixedly connected, the first support portion 11 is away from one end connected to the second support portion 12, and the second support portion 12 is away from one end connected to the first support portion 11, and can overlap with two side edges adjacent to the chamfered surface respectively, the first support portion 11 and / or the second support portion 12 are respectively provided with through holes, and the prestressed structural member can be connected to the force-applying device through the through holes.

[0046] The supporting device is placed at the chamfer of the cable tower 5, so that the first supporting part 11 and the second supporting part 12 are respectively in contact with the two side edges adjacent to the chamfered surface. When in use, the force-applying device can be set on the first supporting part 11 or the second supporting part 12 according to actual needs, so that the force-applying direction of the force-applying device is perpendicular to the surface where the first supporting part 11 is in contact with the side edge of the chamfered surface or the surface where the second supporting part 12 is in contact with the side edge of the chamfered surface. When the force-applying device applies force, the force-applying device drives the first supporting part 11 or the second supporting part 12 to abut against the cable tower 5, so that the positions of the supporting device and the cable tower 5 are relatively fixed. Through this arrangement, the force-applying device can be moved along a direction perpendicular to the first supporting part 11 or the second supporting part 12. The force is applied in the direction of the first support part 11 or the second support part 12, and the first support part 11 or the second support part 12 becomes an effective support surface perpendicular to the force application direction, thereby avoiding changes to the main body of the cable tower 5; by providing through holes in the first support part 11 and the second support part 12, the tensioning device can be connected to the force application device through the through holes. When in use, the force application device can be mounted on the through holes of the first support part 11 or the through holes of the second support part 12. The through holes of the first support part 11 or the through holes of the second support part 12 provide a mounting surface for installing the tensioning device. The tensioning device can be directly connected to the force application device through the through holes, thereby improving the convenience and safety of prestressing tensioning operations at the chamfers of the cable tower 5.

[0047] Furthermore, the force-adding device is a jack. Of course, those skilled in the art may also configure the force-adding device as a tensioning machine or the like.

[0048] Furthermore, the first support portion 11 and the second support portion 12 may be integrally formed, or may be fixedly connected by welding or bolts.

[0049] Furthermore, the first support portion 11 and the second support portion 12 are both rigid flat plates. Of course, those skilled in the art may also configure the first support portion 11 and the second support portion 12 as rigid support blocks or the like.

[0050] Furthermore, the first support portion 11 and the second support portion 12 are both rectangular. Of course, those skilled in the art may also configure the first support portion 11 and the second support portion 12 to be trapezoidal or the like.

[0051] like Figure 1-4 As shown, a support device for prestressed tensioning also includes a limiting portion, which is a limiting plate 2, one side of the limiting plate 2 is fixedly connected to the first supporting portion 11, and the other side is fixedly connected to the second supporting portion 12, the shape of the contact surface of the limiting plate 2 and the chamfered surface depends on the shape of the chamfered surface, the contact surface of the limiting plate 2 and the chamfered surface can fit with the chamfered surface, the chamfered surface is a plane, the limiting plate 2 is a triangle, the contact surface of the limiting plate 2 and the chamfered surface is a plane, the plane area formed by the first supporting portion 11, the second supporting portion 12 and the chamfered surface is a triangle, the limiting plate 2 is inscribed in the first supporting portion 11 and the second supporting portion 12 and the limiting plate 2 can just cover the plane area formed by the first supporting portion 11, the second supporting portion 12 and the chamfered surface, and the limiting plate 2 is used to limit the displacement of the support device around the chamfered surface.

[0052] When in use, the support device is placed at the chamfer of the cable tower 5, so that the first support part 11 and the second support part 12 are respectively in contact with the two side edges adjacent to the chamfered surface, and the limit plate 2 is in contact with the chamfered surface. When the force-applying device applies force, the support device is subjected to the force applied by the force-applying device, and has a tendency to move around the chamfered surface. The limit plate 2 is restricted by the contact with the chamfered surface, and one end of the limit plate 2 abuts against the chamfered surface, generating a force in the opposite direction to the force applied by the force-applying device. At the same time, the contact surface between the limit plate 2 and the chamfered surface will also generate a friction force in the opposite direction to the force applied by the force-applying device, thereby reducing the tendency of the support device to move around the chamfered surface and improving the support device during operation. Stability during prestressing tensioning operation; at the same time, the first support part 11 and the second support part 12 are connected by the limit plate 2, so that the limit plate 2 plays a supporting role between the first support part 11 and the second support part 12, which can improve the bending resistance of the support device; by making the limit plate 2 cover the plane area formed by the first support part 11, the second support part 12 and the chamfered surface, the area of ​​the limit plate 2 inscribed in the first support part 11 and the second support part 12 is maximized. When subjected to the same force, the limit plate 2 with a larger area has a smaller stress per unit area and is less likely to deform, thereby further improving the bending resistance of the support device.

[0053] Furthermore, the limiting portion may be in a strip shape. Of course, those skilled in the art may configure the limiting portion to be in a rectangular shape or the like.

[0054] Furthermore, according to the shape of the chamfered surface, the shape of the contact surface between the limiting plate 2 and the chamfered surface can be set to a curved surface or the like.

[0055] Furthermore, the limiting plate 2 is connected to the first supporting portion 11 and the second supporting portion 12 by welding. Of course, those skilled in the art may set the connection method to be connected by bolts or the like.

[0056] Further, as attached Figure 1 As shown, the limit plate 2 includes a first limit plate 21 and a second limit plate 11, and the first limit plate 21 and the second limit plate 11 are relatively arranged on the upper and lower sides of the first support part 11 and the second support part 12. Of course, those skilled in the art can also set the number of the limit plates 2 to 3, 4, etc.

[0057] Further, as attached Figure 1 As shown, the through hole is a chamfered rectangle. Of course, those skilled in the art can set the through hole to an ellipse, a circle, etc.

[0058] like Figure 1-4 As shown, a support device for prestressed tensioning also includes a stiffening portion, which is a stiffening bar 3. The stiffening bar 3 includes a first stiffening bar 31 and a second stiffening bar 32. The first stiffening bar 31 and the second stiffening bar 32 are respectively fixedly arranged on the first support portion 11 and the second support portion 12. The first stiffening bar 31 is arranged along the length direction of the first support portion 11, and the second stiffening bar 32 is arranged along the length direction of the second support portion 12.

[0059] By making the reinforcing portion into a first reinforcing bar 31 and a second reinforcing bar 32 in the shape of a strip, and the first reinforcing bar 31 is arranged along the length direction of the first support portion 11, and the second reinforcing bar 32 is arranged along the length direction of the second support portion 12, the reinforcing portion and the first support portion 11 and the second support portion 12 form a composite structure. When the first support portion 11 or the second support portion 12 is subjected to the force applied by the force-applying device, it can more effectively bear and transfer the load, make the stress distribution on the first support portion 11 or the second support portion 12 more uniform, reduce local stress concentration, and improve the bending resistance of the support device.

[0060] Furthermore, the shape of the stiffening portion can be set to be a cube, a hemisphere, etc.

[0061] Furthermore, the stiffening bar 3 is fixed to the support portion 1 by welding. Of course, those skilled in the art may set the connection between the stiffening bar 3 and the support portion 1 to be connected by bolts or the like.

[0062] Furthermore, the first stiffening bar 31 is disposed on the outer side surface of the first supporting portion 11 away from the through hole, and the second stiffening bar 32 is disposed on the outer side surface of the second supporting portion 12 away from the through hole.

[0063] Furthermore, those skilled in the art may also set the number of the first stiffening bars 31 to 3, 4, etc., and the number of the second stiffening bars 32 to 3, 4, etc.

[0064] Further, the first stiffening bar 31 is arranged on the first support portion 11 , and the second stiffening bar 32 is arranged on the second support portion 12 . Alternatively, the first stiffening bar 31 may be arranged on the second support portion 12 , and the second stiffening bar 32 may be arranged on the first support portion 11 .

[0065] like Figure 1-4 As shown, a support device for prestressed tensioning further includes a hoisting portion 4, and the hoisting portion 4 is used to connect a lifting device.

[0066] By providing the hoisting portion 4, it is convenient to hoist the support device through the hoisting portion 4, thereby improving the convenience of using the support device.

[0067] Furthermore, the hoisting portion 4 is a lifting ear. Of course, those skilled in the art may also configure the hoisting portion 4 as a lifting hook, a lifting ring, etc.

[0068] Furthermore, the number of the hoisting parts 4 is 2. Of course, those skilled in the art may also set the number of the hoisting parts 4 to 3, 4, etc.

[0069] Further, as attached Figure 1 As shown, the hoisting portion 4 is fixedly disposed on the top of the first supporting portion 11 and the second supporting portion 12 .

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A support device for prestressing, characterized in that: The invention comprises a first supporting part (11) and a second supporting part (12), wherein the first supporting part (11) and the second supporting part (12) are connected, and an end of the first supporting part (11) away from the connection with the second supporting part (12) and an end of the second supporting part (12) away from the connection with the first supporting part (11) are respectively used to overlap two side edges adjacent to the chamfered surface of the chamfered part of the cable tower, and the first supporting part (11) and / or the second supporting part (12) are respectively provided with through holes, and the prestressed structural member can be connected to the force-applying device through the through holes.

2. A support device for prestressing tensioning according to claim 1, characterized in that: It also comprises a limiting portion, one side of which is fixedly connected to the first supporting portion (11) and the other side of which is fixedly connected to the second supporting portion (12), the contact surface between the limiting portion and the chamfered surface being able to fit with the chamfered surface, and the limiting portion being used to limit the displacement of the supporting device.

3. A support device for prestressing tensioning according to claim 2, characterized in that: The limiting portion is a limiting plate (2), the limiting plate (2) is inscribed in the first supporting portion (11) and the second supporting portion (12), the shape of the contact surface between the limiting plate (2) and the chamfered surface depends on the shape of the chamfered surface, and the limiting plate (2) can cover a plane area formed by the first supporting portion (11), the second supporting portion (12) and the chamfered surface.

4. A support device for prestressing tensioning according to claim 3, characterized in that: The limiting plate (2) comprises a first limiting plate (21) and a second limiting plate (22), wherein the first limiting plate (21) and the second limiting plate (22) are respectively arranged on upper and lower sides of the first supporting portion (11) and the second supporting portion (12) in a manner opposite to each other.

5. A support device for prestressing tensioning according to claim 4, characterized in that: The through hole is oval.

6. A support device for prestressing according to any one of claims 1 to 5, characterized in that: It also comprises a stiffening portion, wherein the stiffening portion is fixedly arranged on the first supporting portion (11) and the second supporting portion (12).

7. A support device for prestressing tensioning according to claim 6, characterized in that: The stiffening portion comprises a stiffening bar (3), wherein the stiffening bar (3) comprises a first stiffening bar (31) and a second stiffening bar (32), wherein the first stiffening bar (31) and the second stiffening bar (32) are respectively fixedly arranged on the first supporting portion (11) and the second supporting portion (12), wherein the first stiffening bar (31) is arranged along the length direction of the first supporting portion (11), and the second stiffening bar (32) is arranged along the length direction of the second supporting portion (12).

8. A support device for prestressing tensioning according to claim 7, characterized in that: The first stiffening strip (31) is arranged on the outer side surface of the first supporting portion (11) away from the through hole, and the second stiffening strip (32) is arranged on the outer side surface of the second supporting portion (12) away from the through hole.

9. A support device for prestressing tensioning according to claim 6, characterized in that: It also comprises a hoisting part (4), wherein the hoisting part (4) is used for connecting to a hoisting device.

10. A support device for prestressing tensioning according to claim 9, characterized in that: The hoisting portion (4) is fixedly arranged on the top of the first supporting portion (11) and the second supporting portion (12).

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