A PC continuous beam 0# block integrated multi-purpose support structure and construction method

Abstract

This invention relates to an integrated multi-purpose support structure and construction method for a PC continuous beam 0# block. The structure includes: a support body comprising at least two vertically arranged steel pipes, the bottom end of each pipe for fixed connection to the bridge's abutment; prestressed steel bars, with at least one prestressed steel bar threaded through each steel pipe, the lower end of the prestressed steel bar anchored in the foundation of the abutment, and the upper end extending out of the top plate of the 0# block; and a filler, which is concrete poured and solidified within the steel pipes, forming a steel-concrete composite load-bearing column together with the steel pipes and prestressed steel bars. The prestressed steel bars are configured to sequentially function as construction support for the 0# block, as a post-anchor system for the cantilever casting formwork, and as a temporary consolidation system for the pier and beam. By integrating support, anchoring, and consolidation functions into one unit, and utilizing the role-changing capabilities of the prestressed steel bars, a single structure can be implemented across multiple construction stages, significantly reducing materials, lowering risks, shortening the construction period, and balancing efficiency, cost, and safety.

Description

Technical Field

[0001] This invention relates to the field of bridge construction technology, and in particular to a multi-purpose support structure and construction method for a PC continuous beam 0# block. Background Technology

[0002] With the rapid development of transportation infrastructure construction in my country, long-span prestressed concrete (PC) continuous beam bridges are widely used in highways, railways, and urban bridges due to their advantages such as high structural stiffness and good driving comfort. In the cantilever construction of PC continuous beam bridges, the construction of the first beam segment (i.e., block 0) at the top of the pier is a crucial first step, and its construction quality and efficiency directly affect the advancement of subsequent cantilever segments and the closure of the entire bridge. The construction of block 0 typically requires the erection of a dedicated temporary support structure, which must withstand enormous construction loads and provide anchorage and consolidation foundations for subsequent cantilever pouring.

[0003] Currently, conventional construction of the 0# block mainly uses either minimal or full-span scaffolding as temporary support. After the concrete of the 0# block is poured and reaches its strength, this set of support scaffolding needs to be removed. Subsequently, for cantilever casting, additional components such as finely rolled threaded steel bars need to be embedded in the pier top to achieve temporary fixation of the pier and beam, resisting unbalanced bending moments during construction. Simultaneously, the post-anchoring of each segment of the hanging basket equipment used for cantilever casting also requires drilling holes in the already poured beam and embedding anchoring steel bars. These temporary measures are independent of each other and implemented sequentially.

[0004] However, the aforementioned existing technologies have obvious drawbacks: the construction procedures are numerous and fragmented, resulting in a long critical path construction period; various temporary structures (such as support frames, reinforcing bars, and hanging basket anchor bars) require repeated investment of large amounts of steel, resulting in low material turnover and high construction costs; high-altitude operations are frequent, especially the pier top consolidation and beam top anchoring operations, which pose significant construction safety risks; and multiple installation and dismantling operations also cause a certain degree of interference and damage to the pier and beam structures. Summary of the Invention

[0005] To address the technical problems of numerous procedures, high costs, and poor safety in existing technologies, this invention provides an integrated multi-purpose support structure and construction method for a PC continuous beam 0# block. The technical solution is as follows:

[0006] On one hand, a multi-purpose support structure for a PC continuous beam 0# block is provided. This structure includes: a support body comprising at least two vertically arranged steel pipes, the bottom end of each steel pipe being fixedly connected to the bridge pier; prestressed steel bars, with at least one prestressed steel bar passing through each steel pipe, the lower end of the prestressed steel bar anchored in the foundation of the pier and the upper end extending out of the top plate of the 0# block; and a filler, which is concrete poured and solidified within the steel pipes, forming a steel-concrete composite load-bearing column together with the steel pipes and the prestressed steel bars. The prestressed steel bars are configured such that the portion extending upwards through the 0# block beam can selectively anchor to the rear anchor point of the cantilever casting formwork or to the 0# block beam itself, thereby enabling the support structure composed of the steel-concrete composite load-bearing column to sequentially function as a construction support for the 0# block, a rear anchor system for the cantilever casting formwork, and a temporary pier-beam consolidation system.

[0007] On the other hand, a construction method for PC continuous beams is provided, which includes: constructing the pier cap and columns; constructing the integrated multi-purpose support structure for the 0# block of the PC continuous beam; constructing the 0# block beam on the support structure; installing a cantilever casting formwork on the 0# block beam and anchoring the rear anchor point of the cantilever casting formwork to the upper end of the prestressed steel bars; using the prestressed steel bars as the rear anchor, performing cantilever segment casting construction using the cantilever casting formwork; moving the cantilever casting formwork forward and anchoring the upper end of the prestressed steel bars to the 0# block beam, so that the prestressed steel bars become part of the temporary pier-beam consolidation system; and dismantling the support structure after the PC continuous beam is closed.

[0008] The beneficial effects of the technical solution provided by the embodiments of the present invention include at least the following: by integrating the functions of support, anchoring and consolidation into an integrated support structure, the construction process is significantly simplified; the structure utilizes built-in prestressed steel bars as a component of the support system during the construction stage of block #0; in the early stage of cantilever casting, it can be directly used as a reliable rear anchor system for the formwork, eliminating the need for drilling holes in the beam to embed anchor bars; after the formwork is moved forward, the prestressed steel bars can be converted into an important component of the temporary consolidation system for the pier and beam, replacing the traditional temporary consolidation measures at the pier top; this innovative design enables a set of temporary structures to run through multiple key construction stages, thereby significantly reducing the amount of temporary materials used, reducing the risks and difficulties of high-altitude operations, effectively shortening the overall construction cycle, and achieving comprehensive benefits of improved efficiency, cost savings and enhanced safety. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0010] Figure 1 This is a schematic diagram of a PC continuous beam 0# block integrated multi-purpose support structure provided in an embodiment of the present invention;

[0011] Figure 2 This is a schematic diagram of a cantilever casting basket anchored by a support structure, provided by an embodiment of the present invention;

[0012] Figure 3 This is a schematic diagram of an embodiment of the present invention that uses a support structure to anchor the 0# block beam;

[0013] Figure 4 This is a flowchart of a PC continuous beam construction method provided in an embodiment of the present invention.

[0014] Explanation of reference numerals in the attached drawings: 101, steel pipe; 102, prestressed steel bar; 103, first embedded plate; 104, second embedded plate; 105, transverse load-bearing beam; 201, pier cap; 202, pier column; 203, cantilever casting formwork. Detailed Implementation

[0015] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0016] In embodiments of the present invention, words such as "exemplarily," "for example," etc., are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" in the present invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the word "exemplary" is intended to present the concept in a concrete manner. Furthermore, in embodiments of the present invention, the meaning expressed by "and / or" can be both, or either one.

[0017] In the embodiments of this invention, the terms "image" and "picture" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, they convey the same meaning. Similarly, the terms "of," "corresponding (relevant)," and "corresponding" may sometimes be used interchangeably. It should be noted that, without emphasizing the distinction between them, they convey the same meaning.

[0018] In this embodiment of the invention, sometimes a subscript such as W1 may be written in a non-subscript form such as W1. When the difference is not emphasized, the meaning they express is the same.

[0019] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0020] This invention provides an integrated multi-purpose support structure for a PC continuous beam 0# block. For example... Figures 1-3 The diagram shown illustrates the support structure under different functional states. The structure includes the support body, prestressed steel bars 102, and infill. The support structure includes at least two vertically arranged steel pipes 101, the bottom end of which is fixedly connected to the bridge abutment 201. At least one prestressed steel bar 102 is inserted through each steel pipe 101, the lower end of which is anchored to the foundation of the abutment 201 and the upper end extends out of the top plate of block 0. The filling material is concrete poured and solidified in the steel pipes 101, which together with the steel pipes 101 and the prestressed steel bars 102 form a steel-concrete composite load-bearing column. The prestressed steel bars 102 are configured such that the portion extending upward through the beam of block 0 can be selectively anchored to the rear anchor point of the cantilever casting basket 203 or to the beam of block 0 itself, so that the support structure composed of steel-concrete composite load-bearing columns can sequentially function as a construction support for block 0, a rear anchor system for the cantilever casting basket 203, and a temporary pier-beam consolidation system.

[0021] In the conventional construction of PC continuous beam 0# block, the support structure used is usually a temporary support system with a single function. Common examples include small supports erected with steel pipes 101, structural steel, or Bailey bridge panels, or full-span supports erected with coupler-type or cup-lock type steel pipes 101. The design purpose of this type of support structure is only to bear the vertical load during the concrete pouring of 0# block. Once 0# block reaches its design strength, it completes its function and is completely dismantled. It lacks functional connection and continuity with the permanent bridge structure (such as pier caps 201 and columns 202) and subsequent construction equipment (such as cantilever casting baskets 203).

[0022] Compared with existing support structures, the support structure of this invention has fundamental differences and significant advantages: First, in terms of structural function, traditional supports are merely "passive" supports, while the structure of this invention is an "active" multi-functional load-bearing and anchoring system, with its core prestressed steel bar 102 capable of changing roles according to the needs of each construction stage. Second, in terms of construction process, traditional methods require a series of sequential steps: "erecting the support frame → dismantling the support frame → setting up the hanging basket for anchoring → setting up temporary fixation," resulting in numerous interruptions. This invention, however, achieves a continuous flow operation: "erecting an integrated support frame → pouring the 0# block → switching functions for cantilever construction," with seamless process connections. Third, in terms of economy, traditional methods consume a large amount of temporary steel with few turnovers; this invention, through the reuse of the prestressed steel bar 102 and the long-term presence of the support, greatly improves material utilization efficiency and reduces overall investment. Finally, in terms of safety, traditional methods involve multiple high-altitude installations, welding, and drilling operations; this invention completes most critical connection work on the ground or at low altitudes and transforms high-risk operations into pre-defined standardized anchoring operations, significantly reducing safety risks.

[0023] Optionally, the structure also includes a first embedded plate 103 pre-embedded in the top surface of the foundation 201, with the bottom end of the steel pipe 101 welded and fixed to the first embedded plate 103. By pre-embedding the first embedded plate 103 in the top surface of the foundation 201, a precise and stable base connection interface is provided for the installation of the support steel pipe 101. During construction, the bottom end of the steel pipe 101 is directly welded and fixed to the first embedded plate 103, which is simple and quick to operate, has high connection strength, and can reliably transfer the vertical load and bending moment borne by the support to the foundation 201. This connection method avoids damage to the permanent structure caused by drilling holes in the foundation 201 on site, and also ensures the rigidity and reliability of the bottom connection of the support, laying a solid foundation for the entire integrated support system.

[0024] Optionally, the structure also includes a second embedded plate 104 pre-embedded in the side of the pier 202, and the support body also includes a transverse load-bearing beam 105, which is welded to the top of multiple steel pipes 101 and the second embedded plate 104. The second embedded plate 104 pre-embedded in the side of the pier 202 and the transverse load-bearing beam 105 connecting the top of the steel pipes 101 and the second embedded plate 104 together constitute the top horizontal constraint and lateral stability system of the support system. The transverse load-bearing beam 105 connects multiple independent steel pipe 101 concrete columns into a whole at the top, forming a stable working platform. Simultaneously, its connection to the side of the pier 202 greatly enhances the support structure's ability to resist horizontal forces (such as wind loads and construction eccentric loads), preventing the support from overturning and ensuring overall stability under the construction of block #0 and subsequent loads. This design achieves collaborative work between the support and the permanent pier 202.

[0025] Optionally, the upper end of the prestressed steel bar 102 extending from the top plate of block #0 is threaded and anchored to an anchor plate via a nut. The threaded upper end of the prestressed steel bar 102, coupled with the nut and anchor plate for anchoring, represents a mature, reliable, and repeatable anchoring method. The finely threaded steel bar, combined with appropriate anchorages, facilitates a secure connection and force adjustment between the prestressed steel bar 102 and the anchor point or beam. This design standardizes and controls the conversion of the prestressed steel bar 102's role; construction workers only need to tighten or loosen the nut to complete the crucial force system conversion, ensuring both safe and reliable connections and improved construction convenience.

[0026] Optionally, the infill material is micro-expansion concrete with a strength grade of C50 or higher. Using micro-expansion concrete with a strength grade of C50 or higher as the infill material ensures that the steel tube 101 concrete column possesses high load-bearing capacity and high stiffness from an early stage. The micro-expansion characteristic allows the concrete to expand moderately during the setting and hardening process, tightly filling the gaps between the inner wall of the steel tube 101 and the prestressed steel bars 102, enhancing the bond strength and integrity among the three, thereby fully utilizing the superior mechanical properties of the steel tube 101 concrete composite structure.

[0027] Optionally, the structure also includes an isolation sleeve, which is fitted over the portion of the prestressed steel bar 102 located within the 0# block beam to isolate the prestressed steel bar 102 from the concrete of the 0# block beam, forming a channel through which the prestressed steel bar 102 passes. The isolation sleeve is the core component for achieving the "channel" function of this structure. Fitted over the section where the prestressed steel bar 102 passes through the 0# block beam, it physically separates the steel bar from the beam concrete. This ensures that the prestressed steel bar 102 can move freely within the channel to meet the length adjustment requirements during initial installation, formwork anchoring and tensioning, and final anchoring with the beam. Simultaneously, the sleeve also provides a closed space for later injection of anti-corrosion grout into the channel, a key design feature ensuring the constructability and long-term durability of the structure.

[0028] Please see Figure 4 The present invention also provides a construction method for PC continuous beams, which includes steps S1 to S7.

[0029] Step S1: Construction of the bridge foundation 201 and piers 202. The bridge foundation 201 is the bridge foundation, transferring the superstructure load to the ground; the piers 202 are the main vertical components supporting the beams. The construction of the bridge foundation 201 and piers 202 is a fundamental step in the construction of the bridge substructure, providing a stable support platform and installation foundation for the construction of the superstructure (including the construction of block #0). The support structure of this invention is erected based on the completed bridge foundation 201 and piers 202.

[0030] Optionally, during step S1, a first embedded plate 103 is pre-embedded on the top surface of the pier cap 201, and a second embedded plate 104 is pre-embedded on the side of the pier column 202. These two embedded plates are pre-embedded to facilitate reliable fixing of the subsequent support structure.

[0031] Step S2: Construct the integrated multi-purpose support structure for the PC continuous beam 0# block mentioned above.

[0032] Optionally, the support structure can be constructed according to the following steps: (1) Weld the bottom end of the steel pipe 101 to the first embedded plate 103; (2) Weld the transverse load-bearing beam 105 to the top of the multiple steel pipes 101 and the second embedded plate 104; (3) Pass the prestressed steel bar 102 through the steel pipe 101 and anchor its lower end to the foundation of the pier 201; (4) Pour the filling material into the steel pipe 101; (5) Install the isolation sleeve on the part of the prestressed steel bar 102 located in the 0# block beam body.

[0033] The construction of this integrated support structure is the core of this method. Following the steps outlined above, a stable bottom and top connecting frame is first established. Then, prestressed steel bars 102 are inserted and anchored at the lower end. Next, concrete is poured to form high-strength steel-concrete composite load-bearing columns. Finally, isolation sleeves are pre-installed to facilitate subsequent functional conversion. This standardized assembly process ensures that the support structure possesses high strength, high rigidity, and pre-installed multi-functional interfaces, providing reliable support for subsequent construction stages.

[0034] Step S3: Construct the 0# block beam on the support structure. When constructing the 0# block beam on the support structure, special attention must be paid to the treatment of the area through which the prestressed steel reinforcement 102 passes. When tying the reinforcement of the 0# block beam, ensure that the prestressed steel reinforcement 102 section with the isolation sleeve is in the designed position, and fix the upper and lower ends of the sleeve during formwork installation to prevent grout from seeping into the sleeve during concrete pouring. After pouring the concrete, a permanent channel for the prestressed steel reinforcement 102 to pass freely will be formed within the beam.

[0035] Step S4: Install the cantilever casting formwork 203 on the 0# block beam and anchor the rear anchor point of the cantilever casting formwork 203 to the upper end of the prestressed steel bar 102. After installing the cantilever casting formwork 203, its rear anchor point is directly anchored to the upper end of the prestressed steel bar 102 that has extended out of the top slab of the 0# block. This step makes full use of the pre-set function of the support structure, transferring the construction load of the formwork directly to the foundation of the pier cap 201 through the prestressed steel bar 102, avoiding adverse local stress on the newly cast 0# block beam, and providing crucial rear anchor protection for the safe commencement of the first cantilever segment casting.

[0036] Step S5: Using prestressed steel bar 102 as the rear anchor, the cantilever segment casting construction is carried out using cantilever casting formwork 203.

[0037] Step S6: Move the cantilever casting formwork 203 forward and anchor the upper end of the prestressed steel reinforcement 102 to the 0# block beam, thus converting the prestressed steel reinforcement 102 into a component of the temporary pier-beam consolidation system. This functional conversion step is performed when the first (or first few) cantilever segments are completed and the formwork needs to be moved forward for the next segment construction. Anchoring the upper end of the prestressed steel reinforcement 102 to the 0# block beam transforms it from a "rear anchor rod of the formwork" into a "temporary consolidation tie rod between the pier and beam." This conversion allows the prestressed steel reinforcement 102 to work together with the lower steel pipe 101 concrete column, forming a temporary consolidation system capable of resisting the unbalanced bending moment generated during cantilever construction, ensuring construction safety and structural stability in subsequent long cantilever conditions.

[0038] Step S7: After the PC continuous beam is closed, remove the support structure.

[0039] Through the above steps, the three functions of temporary support, hanging basket anchoring, and pier-beam consolidation, which are traditionally independent and implemented sequentially, are innovatively integrated into a pre-designed integrated support structure. This is achieved by utilizing the role transformation of the same prestressed steel bar 102 at different construction stages. The resulting benefits are significant: the construction process is highly streamlined and continuous, eliminating waiting and handover between multiple independent procedures such as support frame dismantling, temporary consolidation construction, and hanging basket anchoring pre-embedding, thus significantly shortening critical construction periods; the amount of temporary engineering materials used is significantly reduced, avoiding repeated erection and dismantling of the support frame and the use of large amounts of consumable anchoring steel bars, thereby reducing construction costs; high-altitude and high-risk operations are greatly reduced, transforming the complex anchoring operations located on pier and beam tops in traditional processes into standardized operations based on ground-prefabricated structures, improving the inherent safety level of construction; the structural stress transformation is smooth and reliable, with the functional switching of the prestressed steel bar 102 from load-bearing to anchoring to consolidation all completed under controllable and monitorable conditions, ensuring structural safety and stability throughout the entire construction process. Therefore, this construction method achieves a balance between safety, efficiency, economy, and quality, and has significant advantages and value for widespread application.

[0040] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. A and B can be singular or plural. Additionally, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects, but it can also represent an "and / or" relationship. Please refer to the context for a more accurate understanding.

[0041] In this invention, "at least one" means one or more, and "more than one" means two or more. "At least one of the following" or similar expressions refer to any combination of these items, including any combination of a single item or a plurality of items. For example, at least one of a, b, or c can represent: a, b, c, ab, ac, bc, or abc, where a, b, and c can be a single item or multiple items.

[0042] It should be understood that, in various embodiments of the present invention, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.

[0043] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0044] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the devices, apparatuses, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0045] In the several embodiments provided by this invention, it should be understood that the disclosed devices, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another device, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0046] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0047] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0048] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0049] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A multi-purpose support structure for a PC continuous beam 0# block, characterized in that, The structure includes: The support body includes at least two vertically arranged steel pipes, the bottom end of each steel pipe being fixedly connected to the bridge pier. Prestressed steel bars, at least one prestressed steel bar is inserted inside each of the steel pipes, the lower end of the prestressed steel bar is anchored to the foundation of the pier, and the upper end extends out of the top plate of block 0#; The filling material is concrete poured into and solidified in the steel pipe, and together with the steel pipe and the prestressed steel bars, it forms a steel-concrete composite load-bearing column. The prestressed steel bars are configured such that the portion extending upward through the 0# block beam can be selectively anchored to the rear anchor point of the cantilever casting formwork or to the 0# block beam itself, thereby enabling the support structure composed of the steel-concrete composite load-bearing columns to sequentially function as the construction support for the 0# block, the rear anchor system for the cantilever casting formwork, and the temporary pier-beam consolidation system.

2. The integrated multi-purpose support structure for PC continuous beam 0# block according to claim 1, characterized in that, The structure also includes a first embedded plate pre-embedded in the top surface of the pier, and the bottom end of the steel pipe is welded and fixed to the first embedded plate.

3. The integrated multi-purpose support structure for PC continuous beam 0# block according to claim 1, characterized in that, The structure also includes a second embedded plate pre-embedded on the side of the pier column, and the support body also includes a transverse load-bearing beam, which is welded to the top of the multiple steel pipes and the second embedded plate.

4. The integrated multi-purpose support structure for PC continuous beam 0# block according to claim 1, characterized in that, The prestressed steel bar extending from the top plate of block #0 is threaded and is anchored by a nut in conjunction with the anchor plate.

5. The integrated multi-purpose support structure for PC continuous beam 0# block according to claim 1, characterized in that, The filler is micro-expansion concrete with a strength grade of C50 or higher.

6. The integrated multi-purpose support structure for PC continuous beam 0# block according to claim 1, characterized in that, The structure also includes an isolation sleeve, which is fitted onto the portion of the prestressed steel bar located within the 0# block beam to isolate the prestressed steel bar from the concrete of the 0# block beam, thus forming a channel through which the prestressed steel bar passes.

7. A construction method for PC continuous beams, characterized in that, The method includes: Construction of foundations and piers; Construction of the PC continuous beam 0# block integrated multi-purpose support structure as described in any one of claims 1 to 6; Construct the No. 0 block beam on the aforementioned support structure; Install a cantilever casting formwork on the 0# block beam and anchor the rear anchor point of the cantilever casting formwork to the upper end of the prestressed steel bar. Using the prestressed steel bars as rear anchors, the cantilever segment casting construction is carried out using the cantilever casting formwork; Move the cantilever casting basket forward and anchor the upper end of the prestressed steel bar to the 0# block beam, so that the prestressed steel bar becomes a component of the pier-beam temporary consolidation system; After the PC continuous beam is closed, the support structure is removed.

8. The PC continuous beam construction method according to claim 7, characterized in that, When constructing the foundation and pier, a first embedded plate is pre-embedded on the top surface of the foundation and a second embedded plate is pre-embedded on the side of the pier.

9. The PC continuous beam construction method according to claim 8, characterized in that, Construction of the aforementioned support structure includes: The bottom end of the steel pipe is welded and fixed to the first embedded plate; The transverse load-bearing beam is welded to the top of the multiple steel pipes and the second embedded plate; The prestressed steel bars are threaded through the steel pipe and their lower ends are anchored in the foundation of the pier. The filler is injected into the steel pipe; An isolation sleeve is installed on the portion of the prestressed steel reinforcement located within the 0# block beam.

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