Continuous beam zero block bracket counter-force pre-pressing device

Abstract

The invention provides a continuous beam zero block bracket counter-force pre-pressing device, which belongs to the technical field of continuous beam construction, and comprises a counter-pressure part which is lapped on the upper surface of a bracket and is used for applying a downward acting force to the bracket; the fixing piece is arranged on the peripheral wall of the bridge pier in a sleeving mode and fixed to the ground through a ground pile; the two force transmission pieces are arranged on the two sides of the bridge pier respectively; the two ends of each force transmission piece are connected with the corresponding fixing piece and the corresponding back pressure piece respectively. An included angle is formed between the extending direction of each force transmission piece and the height direction of the pier. When the back pressure part exerts downward acting force on the bracket, the force transmission part transmits upward counter-acting force to the fixing part, so that the fixing part abuts against the bridge pier, and downward static friction force is generated. According to the counter-force pre-pressing device for the continuous beam zero block bracket, pre-pressing operation can be carried out without fixing the bottom end of the force transmission piece in a pre-embedding mode, the construction period of a continuous beam is greatly shortened, and the whole construction progress of the continuous beam zero block is accelerated.

Description

Technical Field

[0001] The invention belongs to the technical field of continuous beam construction, and more specifically, relates to a reaction force preloading device for a zero-block bracket of a continuous beam. Background Art

[0002] In modern bridge engineering construction, continuous beam structures are widely used. Block 0 of the continuous beam is located at the top of the pier and is the key starting point for the entire continuous beam construction. Its construction quality and safety directly affect the construction of subsequent beam sections and the structural performance of the entire bridge. During the construction of the block 0 of the continuous beam, it is usually necessary to build a temporary bracket to support the formwork and concrete loads during the pouring process. By pre-stressing the bracket, the actual load or overload applied during the construction of the block 0 can be simulated, thereby comprehensively testing the strength, stiffness and stability of the bracket, discovering potential safety hazards in the bracket system in advance and making corrections.

[0003] At present, the zero-block bracket of the continuous beam adopts the reaction preloading method. The top of the reaction preloading device presses against the upper surface of the bracket, and the bottom is fixed by pre-buried in the stratum. Then the reaction preloading device applies a downward force to the bracket for pre-loading detection. However, the excavation, backfilling and concrete pouring processes involved in the pre-buried operation not only increase the complexity of the construction process, but also extend the construction period, affecting the progress of the project. Summary of the invention

[0004] The purpose of the present invention is to provide a reaction force preloading device for a continuous beam zero block bracket, aiming to facilitate fixing the bottom end of the reaction force preloading device.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a continuous beam zero block bracket reaction force preloading device, comprising: A counter-pressure member, overlapped on the upper surface of the bracket, for applying a downward force to the bracket; The fixing piece is sleeved on the outer peripheral wall of the pier and fixed to the ground through the ground piles; Two force transmission members are respectively arranged on both sides of the bridge pier; two ends of each of the force transmission members are respectively connected to the fixing member and the counter-pressure member, and an angle is formed between the extension direction of the force transmission member and the height direction of the bridge pier; When the counter-pressure member applies a downward force to the bracket, the force transmission member transmits the upward reaction force to the fixing member, so that the fixing member is pressed against the pier and generates a downward static friction force.

[0006] In a possible implementation, the fixing member includes: Two fixed casings are mutually embraced on the outer peripheral wall of the pier, and the two fixed casings are fixedly connected by bolts; Two positioning frames are fixedly arranged on the fixed sleeve and correspond to the fixed sleeve one by one; the positioning frames correspond to the force transmission members one by one and are connected to the bottom ends of the force transmission members.

[0007] In a possible implementation, the fixing member further includes: Two bases are fixedly arranged on the fixed casing and correspond to the fixed casing one by one; the lower surface of the base is in contact with the ground, and the ground piles penetrate the base from top to bottom and are fixed to the base by bolts.

[0008] In a possible implementation, the fixing member further includes: Two support frames are fixedly arranged between the fixed sleeve and the positioning frame and correspond to the positioning frame one by one. The support frames, the positioning frame and the fixed sleeve form a triangular space.

[0009] In a possible implementation, the force transmission member includes: Two force transmission frames, connected to the counter-pressure member and the fixing member respectively; The two ends of the anchor rod respectively penetrate the two force transmission frames and extend outwards, and are threadedly connected with nuts, which are pressed against the force transmission frames to fix the distance between the two force transmission frames.

[0010] In a possible implementation, the counter-pressure member includes: A back pressure frame, overlapped on the upper surface of the bracket; Two lifting drive members are respectively arranged on both sides of the back pressure frame and correspond one to one with the two force transmission members. The telescopic end of the lifting drive member is connected to the top of the force transmission member, and the fixed end of the lifting drive member is connected to the back pressure frame. The telescopic direction of the lifting drive member is the same as the extension direction of the force transmission member.

[0011] In a possible implementation, the back pressure frame includes: Two horizontal frames are respectively overlapped on the upper surface of the bracket and are arranged parallel to each other, and the horizontal frames are connected to the lifting drive components and correspond one to one; The two longitudinal frames are respectively arranged perpendicularly to the two transverse frames; each longitudinal frame is inserted between the two transverse frames from top to bottom to fix the two transverse frames.

[0012] In a possible implementation, a positioning sleeve for accommodating the lifting drive member is fixedly provided on the cross frame, and the axial direction of the positioning sleeve is the same as the extension direction of the force transmission member.

[0013] In a possible implementation, the vertical frame is provided with a plurality of first positioning grooves evenly distributed along the length direction, and the horizontal frame is suitable for being inserted into any of the first positioning grooves so that the distance between two horizontal frames can be changed.

[0014] In a possible implementation, a plurality of second positioning grooves are evenly distributed on the fixing member along a direction perpendicular to the extending direction of the force transmission member, and the bottom end of the force transmission member is suitable for being inserted into any of the second positioning grooves; The horizontal distance between two adjacent first positioning grooves is the same as the horizontal distance between two adjacent second positioning grooves. The first positioning groove corresponds to the second positioning groove one by one. When the cross frame is plugged into any of the first positioning grooves and the bottom end of the force transmission member is plugged into the corresponding second positioning groove, the inclination degree of the force transmission member remains unchanged.

[0015] Compared with the prior art, the reaction force preloading device for the bracket of the continuous beam block 0 provided by the present invention has the following beneficial effects: when in use, the reaction pressure member applies a downward force to the bracket for preloading, and at the same time, the reaction pressure member will generate an upward reaction force on the force transmission member. The force transmission member transmits the upward reaction force to the fixed member. Since there is an angle between the direction of the reaction force transmitted by the force transmission member and the height direction of the pier, the fixed member can be pressed against the outer peripheral wall of the pier, and a downward static friction force is generated between the pier and the fixed member. The downward static friction force can offset the component of the reaction force in the vertical direction. At the same time, the fixed member is fixed by the connection between the ground pile and the ground, which further ensures the stability of the bottom position of the force transmission member, so that the staff can perform the preloading operation without fixing the bottom end of the force transmission member in a pre-embedded manner, which greatly shortens the construction period of the continuous beam and speeds up the construction progress of the entire continuous beam block 0. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 A front view of a reaction preloading device for a bracket of a zero block of a continuous beam provided in an embodiment of the present invention.

[0018] Figure 2 A schematic diagram of the overall structure of a reaction preloading device for a zero-block bracket of a continuous beam provided in an embodiment of the present invention.

[0019] Figure 3 for Figure 2 Schematic diagram of the enlarged structure of part A.

[0020] In the figure: 1, counter-pressure member; 11, counter-pressure frame; 111, horizontal frame; 112, vertical frame; 1121, first positioning groove; 113, positioning sleeve; 12, lifting drive member; 2, fixing member; 21, fixing sleeve; 22, positioning frame; 221, second positioning groove; 23, base; 24, supporting frame; 3, force transmission member; 31, force transmission frame; 32, anchor rod; 33, nut; 4, ground pile; 51, bracket; 52, bridge pier. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0022] See also Figure 1 and Figure 2 , a reaction prestressing device for a continuous beam zero block bracket provided by the present invention is now described. A reaction prestressing device for a continuous beam zero block bracket comprises a reaction prestressing member 1, a fixing member 2 and two force transmission members 3. Among them, the reaction prestressing member 1 is overlapped on the upper surface of the bracket 51, and is used to apply a downward force to the bracket 51. The fixing member 2 is sleeved on the outer peripheral wall of the pier 52, and is fixed to the ground through the ground piles 4. The two force transmission members 3 are respectively arranged on both sides of the pier 52. The two ends of each force transmission member 3 are respectively connected to the fixing member 2 and the reaction prestressing member 1, and there is an angle between the extension direction of the force transmission member 3 and the height direction of the pier 52. When the reaction prestressing member 1 applies a downward force to the bracket 51, the force transmission member 3 transmits the upward reaction force to the fixing member 2, so that the fixing member 2 is pressed against the pier 52 and generates a downward static friction force.

[0023] When in use, the counter-pressure member 1 applies a downward force to the bracket 51 for pre-compression, and at the same time, the counter-pressure member 1 will generate an upward reaction force on the force transmission member 3. The force transmission member 3 transmits the upward reaction force to the fixing member 2. Since there is an angle between the direction of the reaction force transmitted by the force transmission member 3 and the height direction of the pier 52, the fixing member 2 can be pressed against the outer peripheral wall of the pier 52, and a downward static friction force is generated between the pier 52 and the fixing member 2, and the downward static friction force can offset the component of the reaction force in the vertical direction.

[0024] At the same time, the fixing part 2 is fixed through the connection between the ground pile 4 and the ground, which further ensures the stability of the bottom position of the force transmission part 3, so that the staff can perform pre-compression operations without having to use the pre-embedded method to fix the bottom end of the force transmission part 3, which greatly shortens the construction period of the continuous beam and speeds up the construction progress of the entire continuous beam block No. 0.

[0025] In some embodiments, see Figure 1 and Figure 2 The fixing member 2 includes two fixing housings 21 and two positioning frames 22. The two fixing housings 21 are mutually embraced on the outer peripheral wall of the pier 52, and the two fixing housings 21 are fixedly connected by bolts. The two positioning frames 22 are fixedly arranged on the fixing housings 21 and correspond to the fixing housings 21 one by one. The positioning frames 22 correspond to the force transmission member 3 one by one, and are connected to the bottom end of the force transmission member 3.

[0026] The two fixed sleeves 21 are fixedly connected by bolts, which facilitates the connection and disassembly of the two fixed sleeves 21, improves the installation efficiency, and speeds up the construction progress of the entire continuous beam block 0. The positioning frame 22 is fixedly set on the fixed sleeve 21 and connected to the force transmission member 3, providing a stable connection point and accurate positioning for the force transmission member 3. During the preloading process, the force transmitted by the force transmission member 3 can be transmitted to the fixed sleeve 21 through the positioning frame 22, which improves the overall stability and reliability of the preloading device and ensures that the preloading detection can be carried out stably.

[0027] In some embodiments, see Figure 1 and Figure 2 The fixing member 2 also includes two bases 23 fixedly arranged on the fixing housing 21, and the bases 23 correspond to the fixing housing 21 one by one. The lower surface of the base 23 is in contact with the ground, and the ground pile 4 passes through the base 23 from top to bottom and is fixed to the base 23 by bolts.

[0028] The integrated design of the base 23 and the fixing sleeve 21 makes the installation of the entire fixing member 2 more convenient. At the construction site, it is only necessary to hug the fixing sleeve 21 on the bridge pier 52, then place the base 23 at the predetermined position, drive the ground pile 4 into place and fix it. During the preloading process, when the force transmission member 3 transmits the upward reaction force to the fixing member 2, the base 23 is firmly connected to the ground through the ground pile 4, which can effectively resist the horizontal and vertical forces, and reinforce the fixing member 2.

[0029] In some embodiments, see Figure 1 and Figure 2 The fixing member 2 further includes two support frames 24 fixedly disposed between the fixing housing 21 and the positioning frame 22. The support frames 24 correspond to the positioning frames 22 one by one. The support frames 24, the positioning frames 22 and the fixing housing 21 form a triangular space.

[0030] The support frame 24 is fixedly arranged between the fixing housing 21 and the positioning frame 22 to form a triangular space, which significantly enhances the overall structural strength of the fixing member 2. During the pre-pressing process, when subjected to a large reaction force, the support frame 24 can effectively share and transmit the force, reducing the risk of deformation of the fixing housing 21 and the positioning frame 22 under stress.

[0031] In some embodiments, see Figure 1 and Figure 2 The force transmission member 3 includes two force transmission frames 31 and an anchor rod 32. The two force transmission frames 31 are respectively connected to the counter-pressure member 1 and the fixing member 2. Both ends of the anchor rod 32 respectively penetrate the two force transmission frames 31 and extend outward, and are threadedly connected with a nut 33, which abuts against the force transmission frames 31 to fix the distance between the two force transmission frames 31.

[0032] Specifically, the length direction of the force transmission frame 31 is perpendicular to the length direction of the bridge, and the anchor rod 32 passes through the bracket 51 from top to bottom. During the preloading process, the upward reaction force generated by the counter-pressure member 1 is stably transmitted to the fixing member 2 through the force transmission frame 31 and the anchor rod 32, ensuring stable force transmission. At the same time, by adjusting the position of the nut 33 on the anchor rod 32, the spacing between the two force transmission frames 31 can be changed to adapt to different preloading requirements.

[0033] In some embodiments, see Figure 1 , Figure 2 and Figure 3 The back pressure member 1 includes a back pressure frame 11 and two lifting driving members 12. The back pressure frame 11 is overlapped on the upper surface of the bracket 51. The two lifting driving members 12 are respectively arranged on both sides of the back pressure frame 11, and correspond to the two force transmission members 3 one by one. The telescopic end of the lifting driving member 12 is connected to the top of the force transmission member 3, and the fixed end of the lifting driving member 12 is connected to the back pressure frame 11. The telescopic direction of the lifting driving member 12 is the same as the extension direction of the force transmission member 3.

[0034] Specifically, the lifting drive member 12 adopts a hydraulic cylinder, and the number of hydraulic cylinders is multiple, and they are arranged in a direction perpendicular to the length direction of the bridge. By controlling the extension and contraction of the lifting drive member 12, the magnitude of the force applied by the counter-pressure member 1 to the bracket 51 can be accurately adjusted. During the pre-stressing test, the force can be gradually increased or decreased according to the design requirements and testing standards of the bracket 51 to achieve precise control of the pre-stressing load. When conducting a graded pre-stressing test, the extension and contraction amount of the lifting drive member 12 can be accurately adjusted according to the predetermined load level, so that the bracket 51 is subjected to different levels of loads in turn, thereby comprehensively and accurately testing the performance of the bracket 51, improving the accuracy and reliability of the pre-stressing test, and providing a more scientific basis for the construction of the continuous beam block 0.

[0035] In some embodiments, see Figure 1 and Figure 2The back pressure frame 11 includes two horizontal frames 111 and two vertical frames 112. The two horizontal frames 111 are respectively overlapped on the upper surface of the bracket 51 and are arranged parallel to each other. The horizontal frames 111 are connected to the lifting drive member 12 and correspond one to one. The two vertical frames 112 are respectively arranged vertically with the two horizontal frames 111. Each vertical frame 112 is inserted between the two horizontal frames 111 from top to bottom to fix the two horizontal frames 111.

[0036] Specifically, the length direction of the horizontal frame 111 is perpendicular to the length direction of the bridge, and the length direction of the vertical frame 112 is the same as the length direction of the bridge. The upper surface of the horizontal frame 111 is inclined, so that the lifting drive member 12 is also inclined when it is overlapped on the upper surface of the horizontal frame 111, so that the telescopic direction of the lifting drive member 12 is the same as the extension direction of the anchor rod 32. When the two lifting drive members 12 are extended, the two horizontal frames 111 are respectively generated with the same force as the extension direction of the anchor rod 32, and both forces can be decomposed into a component force in the vertical direction and a component force in the horizontal direction. Among them, the two vertical force components are both vertically downward, and the directions of the two horizontal force components are opposite, and they are transmitted through the vertical frame 112 to achieve mutual offset, ensuring that the bracket 51 only bears the vertical downward force.

[0037] In some embodiments, see Figure 3 A positioning sleeve 113 for accommodating the lifting drive member 12 is fixedly provided on the horizontal frame 111 , and the axial direction of the positioning sleeve 113 is the same as the extending direction of the force transmission member 3 .

[0038] The positioning sleeve 113 provides precise guidance and a stable installation position for the lifting drive member 12. During the operation of the lifting drive member 12, the positioning sleeve 113 can prevent it from deflecting or shaking, ensuring that the extension direction of the lifting drive member 12 is consistent with the extension direction of the force transmission member 3, thereby ensuring that the force applied by the counter-pressure member 1 can be accurately transmitted to the fixing member 2 through the force transmission member 3.

[0039] At the same time, the positioning sleeve 113 can also play a certain protective role on the lifting drive member 12, reduce the wear of the lifting drive member 12, extend its service life, reduce equipment maintenance costs, and ensure the long-term stable operation of the preloading device.

[0040] In some embodiments, see Figure 1 , Figure 2 and Figure 3 A plurality of first positioning grooves 1121 are evenly distributed along the length direction of the vertical frame 112 , and the horizontal frame 111 is suitable for being inserted into any first positioning groove 1121 so that the distance between the two horizontal frames 111 can be changed.

[0041] The multiple first positioning grooves 1121 on the longitudinal frame 112 are plugged into the transverse frame 111, so that the spacing between the two transverse frames 111 can be adjusted as needed. In the pre-pressing of different brackets 51, the spacing of the transverse frames 111 can be changed by selecting different first positioning grooves 1121 to adapt to the size change of the bracket 51, thereby improving the versatility and adaptability of the back pressure frame 11.

[0042] In some embodiments, see Figure 1 The fixing member 2 is provided with a plurality of second positioning grooves 221 in a direction perpendicular to the extension direction of the force transmission member 3, and the bottom end of the force transmission member 3 is suitable for being inserted into any second positioning groove 221. The horizontal distance between two adjacent first positioning grooves 1121 is the same as the horizontal distance between two adjacent second positioning grooves 221, and the first positioning grooves 1121 correspond to the second positioning grooves 221 one by one. When the cross frame 111 is inserted into any first positioning groove 1121 and the bottom end of the force transmission member 3 is inserted into the corresponding second positioning groove 221, the inclination degree of the force transmission member 3 remains unchanged.

[0043] Specifically, the second positioning groove 221 is provided on the lower surface of the positioning frame 22, and the force transmission frame 31 is suitable for being inserted into any second positioning groove 221. When facing brackets 51 of different sizes, the position of the horizontal frame 111 on the vertical frame 112 and the position of the force transmission frame 31 on the positioning frame 22 can be adjusted to enable the anchor rod 32 to maintain a constant tilt angle when facing brackets 51 of different sizes for preloading, thereby reducing the problem of unstable force transmission caused by changes in structural parameters and improving the overall stability and reliability of the preloading device.

[0044] In summary, compared with the prior art, the reaction force preloading device for the bracket of the zero block of the continuous beam provided by the present invention is that when in use, the reaction pressure member 1 applies a downward force to the bracket 51 for preloading, and at the same time, the reaction pressure member 1 will generate an upward reaction force on the force transmission member 3. The force transmission member 3 transmits the upward reaction force to the fixing member 2. Since there is an angle between the direction of the reaction force transmitted by the force transmission member 3 and the height direction of the pier 52, the fixing member 2 can be pressed against the outer peripheral wall of the pier 52, and a downward static friction force is generated between the pier 52 and the fixing member 2. The downward static friction force can offset the component of the reaction force in the vertical direction. At the same time, the fixing member 2 is fixed by the connection between the ground pile 4 and the ground, which further ensures the stability of the bottom position of the force transmission member 3, so that the staff can perform the preloading operation without fixing the bottom end of the force transmission member 3 in a pre-embedded manner, which greatly shortens the construction period of the continuous beam and speeds up the construction progress of the zero block of the entire continuous beam.

[0045] 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.

[0046] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0047] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

Claims

1. A reaction force preloading device for a zero-block bracket of a continuous beam, characterized in that: include: A counter-pressure member (1) overlapped on the upper surface of the bracket (51) and used to apply a downward force to the bracket (51); A fixing member (2) is sleeved on the outer peripheral wall of the bridge pier (52) and fixed to the ground via a ground pile (4); Two force transmission members (3) are respectively arranged on both sides of the bridge pier (52); two ends of each force transmission member (3) are respectively connected to the fixing member (2) and the counter-pressure member (1), and an angle is formed between an extension direction of the force transmission member (3) and a height direction of the bridge pier (52); When the counter-pressure member (1) applies a downward force to the bracket (51), the force transmission member (3) transmits the upward reaction force to the fixing member (2), so that the fixing member (2) is pressed against the pier (52) and generates a downward static friction force.

2. A continuous beam zero block bracket reaction preloading device as claimed in claim 1, characterized in that: The fixing member (2) comprises: Two fixed casings (21) are mutually embraced on the outer peripheral wall of the pier (52), and the two fixed casings (21) are fixedly connected by bolts; Two positioning frames (22) are fixedly arranged on the fixed sleeve (21) and correspond one-to-one with the fixed sleeve (21); the positioning frames (22) correspond one-to-one with the force transmission members (3) and are connected to the bottom ends of the force transmission members (3).

3. A continuous beam zero block bracket reaction preloading device as claimed in claim 2, characterized in that: The fixing member (2) further comprises: Two bases (23) are fixedly arranged on the fixed casing (21) and correspond one to one with the fixed casing (21); the lower surface of the base (23) is in contact with the ground, and the ground pile (4) passes through the base (23) from top to bottom and is fixed to the base (23) by bolts.

4. A continuous beam zero block bracket reaction preloading device as claimed in claim 2, characterized in that: The fixing member (2) further comprises: Two support frames (24) are fixedly arranged between the fixed casing (21) and the positioning frame (22) and correspond one to one with the positioning frame (22); the support frames (24), the positioning frame (22) and the fixed casing (21) form a triangular space.

5. A continuous beam zero block bracket reaction preloading device as claimed in claim 1, characterized in that: The force transmission member (3) comprises: Two force transmission frames (31) are respectively connected to the counter-pressure member (1) and the fixing member (2); The anchor rod (32) has two ends respectively passing through the two force transmission frames (31) and extending outwards, and is threadedly connected with a nut (33), wherein the nut (33) abuts against the force transmission frames (31) to fix the distance between the two force transmission frames (31).

6. A continuous beam zero block bracket reaction preloading device as claimed in claim 1, characterized in that: The counter-pressure member (1) comprises: A back pressure frame (11) overlapped on the upper surface of the bracket (51); Two lifting drive members (12) are respectively arranged on both sides of the back pressure frame (11) and correspond one to one with the two force transmission members (3); the telescopic end of the lifting drive member (12) is connected to the top end of the force transmission member (3); the fixed end of the lifting drive member (12) is connected to the back pressure frame (11); and the telescopic direction of the lifting drive member (12) is the same as the extension direction of the force transmission member (3).

7. A continuous beam zero block bracket reaction preloading device as claimed in claim 6, characterized in that: The back pressure frame (11) comprises: Two cross frames (111) are respectively overlapped on the upper surface of the bracket (51) and are arranged parallel to each other, and the cross frames (111) are connected to the lifting drive member (12) and correspond one to one; The two longitudinal frames (112) are respectively arranged vertically with respect to the two transverse frames (111); each longitudinal frame (112) is inserted between the two transverse frames (111) from top to bottom, and is used to fix the two transverse frames (111).

8. A continuous beam zero block bracket reaction preloading device as claimed in claim 7, characterized in that: A positioning sleeve (113) for accommodating the lifting drive member (12) is fixedly arranged on the cross frame (111), and the axial direction of the positioning sleeve (113) is the same as the extension direction of the force transmission member (3).

9. A continuous beam zero block bracket reaction preloading device as claimed in claim 7, characterized in that: The longitudinal frame (112) is evenly distributed with a plurality of first positioning grooves (1121) along the length direction, and the transverse frame (111) is suitable for being inserted into any of the first positioning grooves (1121) so as to change the spacing between the two transverse frames (111).

10. A continuous beam zero block bracket reaction preloading device as claimed in claim 9, characterized in that: The fixing member (2) is provided with a plurality of second positioning grooves (221) along a direction perpendicular to the extension direction of the force transmission member (3), and the bottom end of the force transmission member (3) is suitable for being inserted into any of the second positioning grooves (221); The horizontal distance between two adjacent first positioning grooves (1121) is the same as the horizontal distance between two adjacent second positioning grooves (221); the first positioning grooves (1121) correspond to the second positioning grooves (221) one by one; when the cross frame (111) is plugged into any of the first positioning grooves (1121) and the bottom end of the force transmission member (3) is plugged into the corresponding second positioning groove (221), the inclination of the force transmission member (3) remains unchanged.

Images