Post-tensioning prestressed segmented node structure and segmented tensioning construction method

Abstract

The application provides a post-tensioning prestressed segmented node structure and a segmented tensioning construction method, and belongs to the technical field of building construction. The construction method comprises the following steps: dividing a construction plane into multiple flow water sections; pouring a concrete beam, and presetting a prestressed pipe in the concrete beam; threading a prestressed tendon in a grouting hole, and segmenting the prestressed tendon at the boundary of the flow water section; offsetting and lengthening the prestressed tendon at the segmented position of the prestressed tendon to the outside of the concrete beam, and installing an anchor and a jack on the lengthened section; the offset directions of the prestressed tendons in adjacent flow water sections are different; pouring a concrete block on the concrete beam to wrap the lengthened section of the prestressed tendon; and after the strength of the concrete beam reaches the design requirement, performing tensioning construction on the prestressed tendon. The offset and lengthened section of the prestressed tendon avoids collision during tensioning, and the lengthened section is wrapped by pouring a concrete block on the concrete beam, so that the offset prestressed tendons can be fixed respectively, and collision caused by shaking of the prestressed tendons is avoided.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a post-tensioned prestressed segmented node structure and a segmented tensioning construction method. Background Technology

[0002] In recent years, the warehousing and logistics industry has flourished, with the construction of warehousing and logistics centers taking place across various regions. Warehouse buildings are often characterized by large floor areas and large structural spans. Due to the advantages of prestressed concrete technology, such as improving the crack resistance and load-bearing capacity of concrete structures, saving materials, and reducing the self-weight of concrete structures, it has been widely used in large-span, large-space warehousing and logistics projects.

[0003] Patent document CN103790385B discloses a construction method for tensioning prestressed structures. By reserving a post-cast section between adjacent flow sections, all prestressed tensioning ends are set at the reserved post-cast section positions. However, when multiple tensioning ends are set at the post-cast section positions, the ends of adjacent prestressed tendons are prone to collision during tensioning, which reduces the tensioning efficiency. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the ends of adjacent prestressing tendons are prone to collision when tensioning is carried out through a continuous section, which reduces the tensioning efficiency. Thus, the present invention provides a post-tensioned prestressed segmented node structure and a segmented tensioning construction method.

[0005] To address the aforementioned technical problems, this invention provides a post-tensioned prestressed segmented tensioning construction method, comprising the following steps:

[0006] The construction site is divided into multiple flow sections;

[0007] Cast concrete beams and pre-stressed ducts are installed in the concrete beams;

[0008] Prestressing tendons are inserted into the grouting holes, and the prestressing tendons are segmented at the boundary of the flow section.

[0009] The prestressing tendons are offset and extended outward from the concrete beam at their segmentation points, and anchorages and jacks are installed on the extended sections; the offset directions of the prestressing tendons in adjacent flow sections are different.

[0010] Concrete blocks are poured onto the concrete beam to enclose the extensions of the prestressed tendons.

[0011] After the concrete beam reaches the design strength, the prestressing tendons are tensioned.

[0012] Optionally, the cast-in-place concrete beam includes the following steps:

[0013] Tie the reinforcing cage at the construction site;

[0014] Prestressed ducts are inserted inside the steel cage, and the prestressed ducts serve as grouting holes.

[0015] Install formwork;

[0016] Pouring concrete;

[0017] Remove the formwork and complete the pouring of the concrete beam.

[0018] Optionally, in the process of dividing the construction plane into multiple flow sections, the multiple flow sections are equally divided.

[0019] Optionally, the equal division size of each of the aforementioned flow sections is less than or equal to 35m.

[0020] Optionally, the boundary of the flow section is set at the beam-column joint.

[0021] Optionally, the construction plane is divided into two equal parts along the length direction and two equal parts along the width direction, forming a first flow section, a second flow section, a third flow section, and a fourth flow section. The second flow section and the third flow section are adjacent to the first flow section and the fourth flow section.

[0022] The construction sequence for each section is as follows: first section, then section two, then section three, and finally section four.

[0023] Optionally, it also includes:

[0024] After the prestressing tendon tensioning is completed, cement grout is injected into the prestressing duct until grout flows out from both ends of the prestressing duct, and then the grouting machine is removed.

[0025] This invention provides a post-tensioned prestressed segmented joint structure, fabricated using any of the post-tensioned prestressed segmented tensioning construction methods described above. The segmented joint structure includes:

[0026] The first concrete beam has a first prestressed tendon inside, and the first prestressed tendon has a first extension section;

[0027] A second concrete beam is disposed opposite to the first concrete beam. The second concrete beam has a second prestressing tendon inside. The second prestressing tendon has a second extension section. The first extension section is disposed on the first side of the second concrete beam, and the second extension section is disposed on the second side of the first concrete beam.

[0028] This invention provides a post-tensioned prestressed segmented joint structure, fabricated using any of the post-tensioned prestressed segmented tensioning construction methods described above. The segmented joint structure includes:

[0029] The third concrete beam has two symmetrically arranged third prestressing tendons inside, and the third prestressing tendons have a third extension section;

[0030] A fourth concrete beam is arranged opposite to the third concrete beam. Two fourth prestressing tendons are symmetrically arranged inside the fourth concrete beam. Each fourth prestressing tendon has a fourth extension segment, and each fourth extension segment is staggered with the corresponding third extension segment.

[0031] This invention provides a post-tensioned prestressed segmented joint structure, fabricated using any of the post-tensioned prestressed segmented tensioning construction methods described above. The segmented joint structure includes:

[0032] The fifth concrete beam has two symmetrically arranged fifth prestressing tendons inside, and the fifth prestressing tendons have a fifth extension section;

[0033] A sixth concrete beam is arranged opposite to the fifth concrete beam. Two symmetrically arranged sixth prestressing tendons are provided inside the sixth concrete beam. Each sixth prestressing tendon has a sixth extension segment, and each sixth extension segment is staggered with the corresponding fifth extension segment.

[0034] A seventh concrete beam is disposed between the fifth concrete beam and the sixth concrete beam. Two symmetrically arranged seventh prestressing tendons are disposed inside the seventh concrete beam, and the seventh prestressing tendons have a seventh extension section.

[0035] The eighth concrete beam is arranged opposite to the seventh concrete beam. The eighth concrete beam has two symmetrically arranged eighth prestressing tendons inside. The eighth prestressing tendon has an eighth extension segment, and each eighth extension segment is staggered with the corresponding seventh extension segment.

[0036] The technical solution of this invention has the following advantages:

[0037] 1. The post-tensioned prestressed segmented tensioning construction method provided by this invention divides the construction plane into multiple flow sections; pours concrete beams and pre-sets prestressed ducts in the concrete beams; inserts prestressing tendons into grouting holes, and segments the prestressing tendons at the boundaries of the flow sections; the prestressing tendons are offset and extended outward from their segment points towards the concrete beam, and anchorages and jacks are installed on their extended sections; the offset directions of the prestressing tendons in adjacent flow sections are different; concrete blocks are poured on the concrete beams to wrap the extended sections of the prestressing tendons; after the strength of the concrete beams reaches the design requirements, the prestressing tendons are tensioned.

[0038] By segmenting the prestressing tendons at the boundaries of the construction flow sections, the inconvenience caused by excessively long prestressing tendons during prestressing construction is avoided, and the prestress loss caused by excessively long prestressing tendons is also reduced. The prestressing tendons are offset and extended outward at the segmentation points, and the offset directions of the prestressing tendons in adjacent flow sections are different, avoiding collisions during tensioning. Furthermore, by casting concrete blocks on the concrete beam to enclose the extended sections, the offset prestressing tendons can be fixed separately to prevent them from shaking and colliding. By aligning the prestressing construction with the on-site construction flow sections, construction efficiency is further improved.

[0039] 2. The post-tensioned prestressed segmental tensioning construction method provided by this invention includes the following steps for casting concrete beams: tying the reinforcing cage at the construction location; inserting prestressing ducts inside the reinforcing cage, with the prestressing ducts serving as grouting holes; installing formwork; pouring concrete; and removing the formwork to complete the casting of the concrete beam. Through the coordination of reinforcing cage tying and formwork, the structure and strength of the concrete beam are ensured to meet design requirements. The pre-installation of prestressing ducts facilitates the subsequent insertion of prestressing tendons, simplifying the duct preparation process.

[0040] 3. The post-tensioned prestressed segmented tensioning construction method provided by the present invention has multiple equally divided sections, which makes the construction and tensioning requirements of the prestressing tendons of each section consistent, making the construction easier to control and further improving the construction efficiency.

[0041] 4. The post-tensioned prestressed segmented tensioning construction method provided by the present invention has a segment size of less than or equal to 35m for each of the aforementioned flow segments, which avoids cracking of the concrete beam due to the expansion of the concrete by water and heat or the shrinkage of the concrete during drying. Therefore, the segment size of the flow segments is avoided to be too long.

[0042] 5. The post-tensioned prestressed segmented tensioning construction method provided by the present invention sets the boundary of the flow section at the beam-column joint. Since the strength at the boundary is not as strong as that of the whole concrete beam, setting the boundary at the beam-column joint can provide support force, further ensuring the stability of the entire building. Attached Figure Description

[0043] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0044] Figure 1 This is a schematic diagram of a segmentation structure in the post-tensioned prestressed segmented tensioning construction method provided in Embodiment 1 of the present invention;

[0045] Figure 2 This is a schematic diagram of another division structure of the flow section in the post-tensioned prestressed segmented tensioning construction method provided in Embodiment 1 of the present invention;

[0046] Figure 3 for Figure 2 A schematic diagram of the structural boundaries of the division methods in the text;

[0047] Figure 4 for Figure 3 A magnified view of a portion of the image (I);

[0048] Figure 5 for Figure 1 A schematic diagram of the structural boundaries of the division methods in the text;

[0049] Figure 6 for Figure 5 Schematic diagram II of the enlarged portion;

[0050] Figure 7 for Figure 5 Schematic diagram III of the enlarged portion;

[0051] Figure 8 This is a schematic diagram of the post-tensioned prestressed segmented node structure provided in Embodiment 2 of the present invention;

[0052] Figure 9 for Figure 8 A schematic diagram of the AA structure in the diagram;

[0053] Figure 10 This is a schematic diagram of the post-tensioned prestressed segmented node structure provided in Embodiment 3 of the present invention;

[0054] Figure 11 for Figure 10 A schematic diagram of the BB structure in the image;

[0055] Figure 12 This is a schematic diagram of the post-tensioned prestressed segmented node structure provided in Embodiment 4 of the present invention;

[0056] Figure 13 for Figure 12 A schematic diagram of the CC structure in the diagram;

[0057] Figure 14 for Figure 12 A schematic diagram of the DD structure in the image.

[0058] Explanation of reference numerals in the attached figures:

[0059] 1. First production section; 2. Second production section; 3. Third production section; 4. Fourth production section; 5. First concrete beam; 6. First prestressed tendon; 7. First extension section; 8. Second concrete beam; 9. Second prestressed tendon; 10. Second extension section; 11. Third concrete beam; 12. Third prestressed tendon; 13. Third extension section; 14. Fourth concrete beam; 15. Fourth prestressed tendon; 16. Fourth extension section; 17. Fifth concrete beam; 18. Fifth prestressed tendon; 19. Fifth extension section; 20. Sixth concrete beam; 21. Sixth prestressed tendon; 22. Sixth extension section; 23. Seventh concrete beam; 24. Seventh prestressed tendon; 25. Seventh extension section; 26. Eighth concrete beam; 27. Eighth prestressed tendon; 28. Eighth extension section; 29. ​​Concrete block; 30. Prestressed tendon. Detailed Implementation

[0060] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0062] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0064] Example 1

[0065] like Figures 1 to 7As shown, the post-tensioned prestressed segmented tensioning construction method provided in this embodiment includes the following steps:

[0066] The construction site is divided into multiple flow sections;

[0067] Cast concrete beams and pre-stressed ducts are installed in the concrete beams;

[0068] Prestressed tendons 30 are inserted into the grouting holes, and the prestressed tendons 30 are segmented at the boundary of the flow section.

[0069] The prestressing tendon 30 is offset and extended to the outside of the concrete beam at its segment, and the extended section is equipped with anchorages and jacks; the offset direction of the prestressing tendon 30 in adjacent flow sections is different;

[0070] Concrete blocks 29 are poured onto the concrete beam to enclose the extension of the prestressed tendons 30.

[0071] After the concrete beam reaches the design strength, the prestressing tendons 30 are tensioned. Generally, the prestressing tendons are tensioned after the strength is not less than 75% of the design strength. The tension force borne by the prestressing tendons is transferred to the concrete beam through the anchorage, so that the concrete generates prestress.

[0072] By segmenting the prestressing tendons at the boundaries of the construction flow sections, the inconvenience caused by excessively long prestressing tendons during prestressing construction is avoided, and the prestress loss caused by excessively long prestressing tendons is also reduced. The prestressing tendons are offset and extended outward at the segmentation points, and the offset directions of the prestressing tendons in adjacent flow sections are different, avoiding collisions during tensioning. Furthermore, by casting concrete blocks on the concrete beam to enclose the extended sections, the offset prestressing tendons can be fixed individually to prevent them from shaking and colliding. By aligning the prestressing construction with the on-site construction flow sections, construction efficiency is further improved.

[0073] Specifically, the construction plan is divided into multiple flow sections: the multiple flow sections are set up equally, so that the construction and prestressing tendon tensioning requirements of each flow section are consistent, making the construction easier to control and further improving the construction efficiency.

[0074] An improved embodiment of the flow section is that the equal division size of each flow section is less than or equal to 35m, so as to avoid cracking of the concrete beam caused by the hydrothermal expansion or drying shrinkage of the concrete, and thus avoid the equal division size of the flow section being too long.

[0075] like Figure 1 and Figure 3As shown, in one specific embodiment of the segment division, the construction plane is divided into two equal parts along its length and two equal parts along its width, resulting in four segments: a first segment 1, a second segment 2, a third segment 3, and a fourth segment 4. The second segment 2 and the third segment 3 are adjacent to the first segment 1 and the fourth segment 4, respectively. The construction sequence of each segment is as follows: first segment 1, then segment 2, then segment 3, and finally segment 4. By constructing adjacent segments sequentially, the overlap of prestressed tendons between segments becomes more precise.

[0076] like Figure 2 and Figure 4 As shown, in another specific implementation of the flow section division, the construction plane is divided into two equal parts along its length based on its dimensions.

[0077] Specifically, the boundary of the water flow section is set at the beam-column joint; since the strength of the boundary is not as strong as that of the whole concrete beam, setting the boundary at the beam-column joint can provide support and further ensure the stability of the entire building.

[0078] Specifically, the process of pouring concrete beams and pre-stressing ducts within the concrete beams includes the following steps:

[0079] Tie the reinforcing cage at the construction site;

[0080] Prestressed ducts are inserted inside the steel cage, and the prestressed ducts serve as grouting holes.

[0081] Install formwork;

[0082] Pouring concrete;

[0083] Remove the formwork and complete the pouring of the concrete beam.

[0084] By coordinating the binding of the reinforcing cage and the formwork, the structure and strength of the concrete beam were ensured to meet the design requirements. The pre-installation of prestressed ducts facilitated the subsequent installation of prestressing tendons, simplifying the duct preparation process. Specifically, the formwork was selected according to the appropriate specifications for the concrete beam. After demolding, the concrete beam was water-cured to prevent water shortage during the hardening process. Significant water shortage can easily lead to cracks in the concrete, resulting in a substantial decrease in the overall strength of the concrete structure.

[0085] Specifically, concrete blocks are poured onto the concrete beam to enclose the extensions of the prestressing tendons: concrete blocks on the opposite side of the concrete beam are used to enclose the extensions of the prestressing tendons extending on this side.

[0086] This embodiment provides a post-tensioned prestressed segmented tensioning construction method, which also includes: after the prestressing tendon tensioning construction is completed, cement grout is injected into the prestressing duct until grout flows out from both ends of the prestressing duct, and then the grouting machine is removed.

[0087] Example 2

[0088] like Figure 8 and Figure 9 As shown, the post-tensioned prestressed segmented node structure provided in this embodiment is fabricated using the post-tensioned prestressed segmented tensioning construction method described in Embodiment 1. The segmented node structure includes a first concrete beam 5 and a second concrete beam 8. The first concrete beam 5 has a first prestressing tendon 6 inside, and the first prestressing tendon 6 has a first extension section 7. The second concrete beam 8 is arranged opposite to the first concrete beam 5. The second concrete beam 8 has a second prestressing tendon 9 inside, and the second prestressing tendon 9 has a second extension section 10. The first extension section 7 is located on the first side of the second concrete beam 8, and the second extension section 10 is located on the second side of the first concrete beam 5.

[0089] Specifically, according to the direction shown in the diagram, the first side is the upper part of the drawing plane orientation, the second side is the lower part of the drawing plane orientation, the offset of the extension section is an arc-shaped structure, and the end of the extension section is equipped with an anchor.

[0090] This embodiment features a unidirectional beam with a single row of prestressed tendons, which can be used in, for example... Figure 3 and Figure 4 Between the flow sections shown.

[0091] Example 3

[0092] like Figure 10 and Figure 11 As shown in the figure, the post-tensioned prestressed segmented node structure provided in this embodiment includes a third concrete beam 11 and a fourth concrete beam 14. The third concrete beam 11 has two symmetrically arranged third prestressing tendons 12 inside, and each third prestressing tendon 12 has a third extension segment 13. The fourth concrete beam 14 is arranged opposite to the third concrete beam 11, and the fourth concrete beam 14 has two symmetrically arranged fourth prestressing tendons 15 inside, each fourth prestressing tendon 15 has a fourth extension segment 16, and each fourth extension segment 16 is staggered with the corresponding third extension segment 13.

[0093] Specifically, the extension segments extend to the same side as themselves.

[0094] This embodiment features a unidirectional beam with double rows of prestressed tendons, which can be used in, for example... Figure 5 and Figure 6 The two adjacent water sections shown are shown.

[0095] Example 4

[0096] like Figures 12 to 14 As shown in the embodiment, the post-tensioned prestressed segmented joint structure includes a fifth concrete beam 17, a sixth concrete beam 20, a seventh concrete beam 23, and an eighth concrete beam 26. The fifth concrete beam 17 has two symmetrically arranged fifth prestressing tendons 18, each with a fifth extension 19. The sixth concrete beam 20 is positioned opposite the fifth concrete beam 17, and has two symmetrically arranged sixth prestressing tendons 21, each with a sixth extension 22. Each sixth extension 22 is connected to the opposite... The fifth extension segment 19 is staggered; the seventh concrete beam 23 is disposed between the fifth concrete beam 17 and the sixth concrete beam 20, and two symmetrically arranged seventh prestressing tendons 24 are disposed inside the seventh concrete beam 23, and each seventh prestressing tendon 24 has a seventh extension segment 25; the eighth concrete beam 26 is disposed opposite to the seventh concrete beam 23, and two symmetrically arranged eighth prestressing tendons 27 are disposed inside the eighth concrete beam 26, each eighth prestressing tendon 27 has an eighth extension segment 28, and each eighth extension segment 28 is staggered with the corresponding seventh extension segment 25.

[0097] Specifically, the four concrete beams are arranged in a cross structure.

[0098] This embodiment features a structure with double rows of prestressed tendons within a bidirectional beam, which can be used in, for example... Figure 5 and Figure 7 The common point of the four water flow sections shown.

[0099] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A post-tensioned prestressed segmented tensioning construction method, characterized in that, Includes the following steps: The construction site is divided into multiple flow sections; Cast concrete beams and pre-stressed ducts are pre-installed in the concrete beams, which serve as grouting holes; Prestressed tendons (30) are inserted into the grouting holes, and the prestressed tendons (30) are segmented at the boundary of the flow section; The prestressing tendons (30) are offset and extended to the outside of the concrete beam at their segmentation points, and anchorages and jacks are installed on the extended sections; the offset directions of the prestressing tendons (30) in adjacent flow sections are different; A concrete block (29) is poured on the concrete beam to enclose the extension of the prestressed tendon (30); After the concrete beam reaches the design strength, the prestressed tendons (30) are tensioned.

2. The post-tensioned prestressed segmented tensioning construction method according to claim 1, characterized in that, The process of pouring concrete beams includes the following steps: Tie the reinforcing cage at the construction site; Prestressed ducts are inserted inside the steel cage; Install formwork; Pouring concrete; Remove the formwork and complete the pouring of the concrete beam.

3. The post-tensioned prestressed segmented tensioning construction method according to claim 1, characterized in that, The construction plane is divided into multiple flow sections, and the multiple flow sections are equally divided.

4. The post-tensioned prestressed segmented tensioning construction method according to claim 3, characterized in that, The equal division size of each of the aforementioned flow sections is less than or equal to 35m.

5. The post-tensioned prestressed segmented tensioning construction method according to claim 1, characterized in that, The boundary of the flow section is set at the beam-column joint.

6. The post-tensioned prestressed segmented tensioning construction method according to claim 1, characterized in that, The construction plane is divided into two equal parts along the length direction and two equal parts along the width direction, and is divided into a first flow section (1), a second flow section (2), a third flow section (3) and a fourth flow section (4). The second flow section (2) and the third flow section (3) are adjacent to the first flow section (1) and the fourth flow section (4). The construction sequence of each section is as follows: first section (1), then section (2), then section (3), and finally section (4).

7. The post-tensioned prestressed segmental tensioning construction method according to any one of claims 1-5, characterized in that, Also includes: After the prestressing tendon tensioning is completed, cement grout is injected into the prestressing duct until grout flows out from both ends of the prestressing duct, and then the grouting machine is removed.

8. A post-tensioned prestressed segmented joint structure, characterized in that, The segmented joint structure is fabricated using the post-tensioned prestressed segmented tensioning construction method according to any one of claims 1-7, wherein the segmented joint structure includes: The first concrete beam (5) has a first prestressed tendon (6) inside, and the first prestressed tendon (6) has a first extension section (7); The second concrete beam (8) is disposed opposite to the first concrete beam (5). The second concrete beam (8) is provided with a second prestressed tendon (9). The second prestressed tendon (9) has a second extension section (10). The first extension section (7) is disposed on the first side of the second concrete beam (8), and the second extension section (10) is disposed on the second side of the first concrete beam (5).

9. A post-tensioned prestressed segmented joint structure, characterized in that, The segmented joint structure is fabricated using the post-tensioned prestressed segmented tensioning construction method according to any one of claims 1-7, wherein the segmented joint structure includes: The third concrete beam (11) has two symmetrically arranged third prestressing tendons (12) inside, and the third prestressing tendons (12) have a third extension section (13). The fourth concrete beam (14) is arranged opposite to the third concrete beam (11). The fourth concrete beam (14) has two symmetrically arranged fourth prestressing tendons (15) inside. The fourth prestressing tendon (15) has a fourth extension segment (16). Each fourth extension segment (16) is staggered with the corresponding third extension segment (13).

10. A post-tensioned prestressed segmented joint structure, characterized in that, The segmented joint structure is fabricated using the post-tensioned prestressed segmented tensioning construction method according to any one of claims 1-7, wherein the segmented joint structure includes: The fifth concrete beam (17) has two symmetrically arranged fifth prestressing tendons (18) inside, and the fifth prestressing tendon (18) has a fifth extension section (19). The sixth concrete beam (20) is arranged opposite to the fifth concrete beam (17). The sixth concrete beam (20) has two symmetrically arranged sixth prestressing tendons (21) inside. The sixth prestressing tendon (21) has a sixth extension segment (22). Each sixth extension segment (22) is staggered with the corresponding fifth extension segment (19). The seventh concrete beam (23) is disposed between the fifth concrete beam (17) and the sixth concrete beam (20). The seventh concrete beam (23) is provided with two symmetrically arranged seventh prestressing tendons (24), and the seventh prestressing tendons (24) have a seventh extension section (25). The eighth concrete beam (26) is arranged opposite to the seventh concrete beam (23). The eighth concrete beam (26) has two symmetrically arranged eighth prestressing tendons (27) inside. The eighth prestressing tendon (27) has an eighth extension segment (28). Each eighth extension segment (28) is staggered with the corresponding seventh extension segment (25).

Images