A half-precast assembly type high-performance concrete formwork cap beam and a construction method thereof

Abstract

The application provides a half-precast assembly type high-performance concrete formwork cap beam, which comprises a bottom plate, the bottom plate being composed of a plurality of bottom plate module end blocks and bottom plate module middle blocks; a web plate, the web plate being composed of a plurality of web plate module end blocks and a plurality of web plate module middle blocks; a plurality of the pair of pull constraint assemblies being arranged on the web plate module end blocks and the web plate module middle blocks; and two cover plates, the two cover plates being arranged on the two sides of the web plate respectively. The half-precast assembly type high-performance concrete formwork cap beam and the construction method provided by the application can be prefabricated and modularized in a factory, hoisted and grouted after the finished product is transported to a site, and the construction efficiency is improved. The cap beam formwork made of ultra-high performance concrete (UHPC) is used as a permanent formwork for grouting concrete, the amount of formwork engineering and the cost are saved, the construction process is simplified, the bottom plate and the web plate are divided into a plurality of assemblies, and the difficulty of transportation and hoisting is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering construction technology, and in particular to a cap beam with a semi-prefabricated high-performance concrete formwork and its construction method. Background Technology

[0002] In recent years, with the continuous development of urban bridge construction and prefabricated buildings, the overall construction level of bridges has improved rapidly. At present, the construction of bridge cap beams generally adopts three methods: on-site concrete pouring, overall prefabrication followed by on-site hoisting, and on-site hoisting and pouring of semi-prefabricated formwork.

[0003] In the commonly used method of on-site formwork casting for cap beams, the construction team needs to work on the bridge piers to form formwork and enclose the construction area. This method has many disadvantages, such as long construction period, a lot of waste, and unstable construction quality. At the same time, on-site formwork casting also requires the enclosure of the surrounding area, which seriously affects the road traffic under the bridge.

[0004] To overcome these shortcomings, researchers began experimenting with methods that involved prefabrication of the entire structure and then transporting it to the site for hoisting. Chinese patent application CN208121543 U discloses a prefabricated assembled cap beam structure, which involves prefabricating the cap beam components as a whole in a factory and then transporting these prefabricated components to the site for installation.

[0005] Although this method enables rapid installation of the cap beams and ensures their quality, it still has shortcomings, the most significant being the large size and weight of the precast cap beams, making transportation difficult.

[0006] In the aforementioned patent application, the precast cap beam is a reinforced concrete structure. The cap beam has a large volume and weight, which increases the difficulty of handling and long-distance transportation. On the other hand, the large volume of reinforced concrete components is prone to swaying during hoisting, making installation and positioning difficult.

[0007] In addition, some researchers have studied semi-prefabricated assembled formwork. In Chinese patent application with publication number CN 113279324 A, a semi-prefabricated UHPC-NC composite cap beam connection structure and assembly method are disclosed. The formwork is prefabricated as a whole in the factory and then transported to the site for hoisting and concrete pouring.

[0008] This method solves the problems of transportation and installation positioning difficulties in the overall prefabrication method. However, there are still shortcomings. The main one is that the prefabricated overall cap beam formwork is large in volume. Although the formwork is reinforced by stiffening ribs, it is easy to be damaged during transportation and installation. In addition, it is also more difficult to install large-volume concrete formwork in areas with complex terrain.

[0009] Therefore, it is necessary to provide a cap beam for a semi-prefabricated assembled high-performance concrete formwork and a construction method to solve the above-mentioned technical problems. Summary of the Invention

[0010] This invention provides a cap beam and construction method for a semi-prefabricated high-performance concrete formwork, which solves the problem that it is difficult to install large-volume concrete formwork in areas with complex terrain.

[0011] To solve the above-mentioned technical problems, the present invention provides a cap beam for a semi-prefabricated high-performance concrete formwork, comprising:

[0012] The base plate is composed of multiple base plate module end blocks and base plate module intermediate blocks;

[0013] The web plate is composed of multiple web plate module end blocks and multiple web plate module intermediate blocks.

[0014] Multiple tension constraint components are disposed on the end block and the intermediate block of the web module;

[0015] Two cover plates are respectively disposed on both sides of the web plate;

[0016] The bottom plate, web plate, and cover plate are connected by grouting through end connectors to form an enclosed cavity of the template, and a steel cage is installed inside the enclosed cavity.

[0017] Preferably, the two ends of the middle block of the base plate module are respectively provided with base plate extended reinforcing bars and mounting holes, one end of the base plate module end block is provided with mounting holes, and the other end of the base plate module end block is provided with base plate extended reinforcing bars.

[0018] Preferably, one end and one side of the web module end block and the web module middle block are respectively provided with web vertical outward reinforcing bars and web transverse outward reinforcing bars, and the other end of the web module middle block is provided with an installation hole.

[0019] Preferably, one side of the cover plate is provided with an extended reinforcing bar, and one end of the cover plate is provided with a grouting sleeve. The grouting sleeve includes a grouting hole, an overflow hole, and a grouting cavity. The grouting hole and the overflow hole are both connected to the interior of the grouting cavity.

[0020] Preferably, the base plate has an installation groove, and the interior of the installation groove has an installation hole for connecting with the bridge pier.

[0021] Preferably, the tension restraint assembly includes two steel plates, with a tension rod running through the two steel plates, and one side of each of the two steel plates is threadedly connected to the tension rod by tension bolts.

[0022] Preferably, a connector is provided at one end of the web, and an assembly hole is provided at the other end of the web. The connector includes a front end and a rear end. The front end of the connector includes an extended connector, and the surface of the extended connector is provided with spiral protrusions.

[0023] Preferably, one end of the extended connector is connected to a connecting sleeve, one side of the connecting sleeve is fixedly connected to a connecting frame, the rear end of the connector includes an outer cylinder, one end of the outer cylinder is rotatably connected to the inside of the connecting sleeve, an inner rod is slidably connected inside the outer cylinder, the inner rod has a through hole, the outer cylinder has an annular groove, an embedded rod is provided on one side of the outer cylinder, the surface of the embedded rod has an annular protrusion, the end of the inner rod is connected to a connector, and a connecting shaft is fixed inside the connector.

[0024] Preferably, a rectangular cavity is formed on one side of the inner wall of the assembly hole, and an embedding groove is formed on one side of the inner wall of the rectangular cavity.

[0025] This invention also provides a construction method for a cap beam using a semi-prefabricated high-performance concrete formwork, comprising the following steps:

[0026] S1: Prefabrication of cap beam components: According to the design dimensions of the cap beam, prefabricate the steel cage, bottom plate, web plate and cap plate, and leave concrete cavity grouting sleeves and connecting steel bars at the ends;

[0027] S2, Cap Beam Assembly: After transporting each cap beam component to the construction site, the bottom plate with connection and installation holes is installed on the top of the pier, and then the bottom plate, web plate and cap plate are assembled in sequence; during assembly, the steel bars are inserted into the pre-set concrete cavity grouting sleeve, and the connection is achieved by injecting grout into the cavity;

[0028] S3: Lifting and lowering the steel cage: The pre-tied steel cage is lifted into the enclosed cavity of the formwork, and the pier steel bars and cap beam steel bars are connected by binding and welding.

[0029] S4: Connection of tie rods: Pass the screw rods through the pre-set screw holes on the two pairs of side webs, install the tie plates, tighten the bolts, and enhance the rigidity of both sides of the template enclosure cavity;

[0030] S5: Pour concrete into the cavity enclosed by the template, and after curing with water to the specified age, complete the fabrication of the cap beam.

[0031] Compared with related technologies, the cap beam and construction method of the semi-prefabricated high-performance concrete formwork provided by the present invention have the following beneficial effects:

[0032] This invention enables the prefabricated production and installation of cap beam formwork. The cap beam formwork can be prefabricated and modularly produced in the factory, and the finished product can be hoisted and poured after being transported to the site, thus improving construction efficiency.

[0033] The cap beam formwork is made of ultra-high performance concrete (UHPC), which has outstanding advantages such as ultra-high compressive and tensile strength, ultra-high toughness, and ultra-high durability. It solves the problem of poor durability of ordinary concrete while reducing costs. Therefore, it is more suitable as a permanent cap beam formwork.

[0034] Furthermore, the base plate and web plate are divided into multiple components, which effectively reduces the difficulty of transportation and hoisting.

[0035] The components of this invention are simple and reasonable, and the production quality of the controls can be fully controlled during factory prefabrication.

[0036] In this invention, a cap beam formwork made of ultra-high performance concrete (UHPC) is used as a permanent formwork for pouring concrete, which eliminates the amount and cost of formwork work and simplifies the construction process. Attached Figure Description

[0037] Figure 1 A schematic diagram of the structure of the cap beam and construction method of the semi-prefabricated high-performance concrete formwork provided by the present invention;

[0038] Figure 2 This is a top view of the cap beam of a semi-prefabricated assembled high-performance concrete formwork according to the present invention.

[0039] Figure 3 shows a three-dimensional schematic diagram of the steel reinforcement cage inside the casting trough.

[0040] Figure 4 shows a detailed view of the tie plates in the web.

[0041] Figure 5 shows a three-dimensional schematic diagram of the base plate.

[0042] Figure 6 shows a bottom view of the base plate.

[0043] Figure 7 shows a three-dimensional schematic diagram of the web.

[0044] Figure 8 shows a side view of the web.

[0045] Figure 9 shows a detailed view of the cover plate.

[0046] Figure 10 A detailed view of the grouting sleeve is shown;

[0047] Figure 11 This is a structural schematic diagram of the second embodiment of the cap beam and construction method of the semi-prefabricated high-performance concrete formwork provided by the present invention.

[0048] Figure 12 for Figure 11 The enlarged schematic diagram of part A shown below;

[0049] Figure 13 for Figure 11 The diagram shows the structure of the connector.

[0050] Figure 14 for Figure 13 The overall side view shown.

[0051] Numbering on the map:

[0052] 1. Base plate, 2. Web plate

[0053] 3. Tie-coupler assembly; 31. Tie bolt; 32. Tie rod; 33. Steel plate.

[0054] 4. Cover plate; 5. Bridge pier;

[0055] 6. Grouting sleeve; 61. Grouting hole; 62. Overflow hole; 63. Grouting cavity.

[0056] 7. Mounting slot; 8. Mounting hole.

[0057] 9. Bottom slab extended reinforcement; 91. Web vertical extended reinforcement; 92. Web transverse extended reinforcement; 93. Cover slab extended reinforcement.

[0058] 10. Assembly hole; 11. Rectangular cavity;

[0059] 20. Front end of connector; 21. Extended connector; 22. Spiral protrusion; 23. Connecting sleeve; 24. Connecting frame.

[0060] 30. Rear end of connector; 301. Outer cylinder; 302. Annular groove; 303. Embedded rod; 34. Annular protrusion; 35. Inner rod; 36. Through hole; 37. Connector; 38. Connecting shaft. Detailed Implementation

[0061] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0062] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 The cap beam and construction method for semi-prefabricated high-performance concrete formwork; Figure 2 The cap beam and construction method for semi-prefabricated high-performance concrete formwork; Figure 3 The cap beam and construction method for semi-prefabricated high-performance concrete formwork; Figure 4 The cap beam and construction method for semi-prefabricated high-performance concrete formwork; Figure 5 This document describes the cap beam and construction method for semi-precast high-performance concrete formwork. The cap beam for semi-precast high-performance concrete formwork includes:

[0063] Base plate 1, which is composed of multiple base plate module end blocks and base plate module intermediate blocks;

[0064] Web plate 2, which is composed of multiple web plate module end blocks and multiple web plate module intermediate blocks;

[0065] Multiple tension constraint components 3 are disposed on the end block and the intermediate block of the web module;

[0066] Two cover plates 4 are respectively disposed on both sides of the web plate 2;

[0067] The bottom plate 1, web plate 2, and cover plate 4 are connected by grouting through end connectors to form an enclosed cavity of the template, and a steel cage is installed inside the enclosed cavity.

[0068] The two ends of the middle block of the base plate module are respectively provided with the base plate extended steel bar 9 and the mounting hole 8. One end of the base plate module end block is provided with the mounting hole 8, and the other end of the base plate module end block is provided with the base plate extended steel bar 9.

[0069] There are two web plates 2, each web plate preferably includes two web plate module end blocks and two web plate module middle blocks, and the bottom plate 1 preferably has three blocks.

[0070] The end block of the web module and the middle block of the web module are respectively provided with a vertical outward extension bar 91 and a horizontal outward extension bar 92 of the web module. The other end of the middle block of the web module is provided with an installation hole 8.

[0071] Multiple vertical outward-extending reinforcing bars 91 and multiple transverse outward-extending reinforcing bars 92 are provided in the web, and corresponding installation holes 8 are opened here.

[0072] One side of the cover plate 4 is provided with a cover plate extension steel bar 93, and one end of the cover plate 4 is provided with a grouting sleeve 6. The grouting sleeve 6 includes a grouting hole 61, an overflow hole 62 and a grouting cavity 63. The grouting hole 61 and the overflow hole 62 are both connected to the interior of the grouting cavity 63.

[0073] Multiple reinforcing bars 93 are installed on the outer side of the cover plate, and multiple grouting sleeves 6 are installed accordingly.

[0074] The base plate 1 has an installation groove 7, and the interior of the installation groove 7 has an installation hole for connecting with the pier 5.

[0075] The mounting holes 8 are arranged in a matrix with multiple holes.

[0076] The tension restraint assembly 3 includes two steel plates 33, with a tension rod 32 extending through between them. One side of each of the two steel plates 33 is threadedly connected to the tension rod 32 via tension bolts 31. Multiple tension rods 32 are provided, preferably three.

[0077] This invention also provides a construction method for a cap beam using a semi-prefabricated high-performance concrete formwork, comprising the following steps:

[0078] S1: Prefabrication of cap beam components: According to the design dimensions of the cap beam, prefabricate the steel cage, bottom plate 1, web plate 2, and cap plate 4, and leave concrete cavity grouting sleeves 6 and connecting steel bars at their ends;

[0079] S2, Cap Beam Assembly: After transporting each component of the cap beam to the construction site, install the bottom plate 1 with connection and installation holes on the top of the pier, and then assemble the bottom plate 1, web plate 2 and cap plate 4 in sequence; during assembly, insert the reinforcing bars into the pre-set concrete cavity grouting sleeve, and connect them by injecting grout into the cavity.

[0080] S3: Lifting and lowering the steel cage: The pre-tied steel cage is lifted into the enclosed cavity of the formwork, and the pier steel bars and cap beam steel bars are connected by binding and welding.

[0081] S4: Connection of tie rods: Pass the screw rods through the pre-set screw holes on the two pairs of side web plates 2, install the tie plates, tighten the bolts, and enhance the rigidity of both sides of the template enclosure cavity;

[0082] S5: Pour concrete into the cavity enclosed by the template, and after curing with water to the specified age, complete the fabrication of the cap beam.

[0083] like Figure 4 As shown, the tension restraint assembly 3 set in the web 2 consists of tension bolts 31, tension rods 32, and steel plates 33. The web 2 has pre-drilled screw holes. After the template is installed and the reinforcing cage is placed, the tension restraint assembly 3 is installed. The tension rods 32 are passed through the pre-drilled screw holes, the steel plates 33 are installed, and the tension bolts 31 are tightened.

[0084] The overall integrity of the template is improved. After the tie plates are installed, the template is less likely to deform during construction, and the cap beam is less likely to crack after pouring, thus improving its durability.

[0085] like Figure 5 Figure 6 As shown, the base plate 1 is designed and divided into components according to the design dimensions of the cap beam and the construction environment. Among them, at the position of the base plate 1 component corresponding to the connection pier 5, there is an installation groove 7 for connecting and positioning with the pier 5 and a connection installation hole 8 for the pier reinforcement to pass through.

[0086] The ends of the base plate 1 are equipped with connectors, including a pre-set concrete cavity grouting sleeve 6 and an outward reinforcing bar 9 of the base plate.

[0087] During assembly, each component is connected and assembled with the concrete cavity grouting sleeve 6 via the pre-embedded bottom plate reinforcing bars 9.

[0088] like Figure 7 Figure 8 As shown, the web plate 2 is designed and divided into components according to the design dimensions of the cap beam and the construction environment. The web plate 2 is equipped with a tension restraint assembly 3, which includes a tension rod 32, a steel plate 33 and a tension bolt 31.

[0089] The ends of the web plate 2 are provided with connecting parts, including a pre-set concrete cavity grouting sleeve 6 and a vertical outward reinforcing bar 91 and a transverse outward reinforcing bar 92.

[0090] During assembly, each component is connected to the concrete cavity grouting sleeve 6 via the pre-embedded vertical outward reinforcing bars 91 and transverse outward reinforcing bars 92 in the web.

[0091] like Figure 9 As shown, cover plates 4 are respectively installed at both ends of the cap beam formwork, above the bottom plate 1, and in the middle of the web plates 2 on both sides. They are connected and assembled with the transverse outward reinforcing bars 92 of the web plates through grouting sleeves 6, and connected with the grouting sleeves 6 at the ends of the bottom plate 1 through the outward reinforcing bars 93 of the cover plates.

[0092] Furthermore, after the bottom plate 1 is connected and assembled along its length, the cover plate 4 is first connected to the grouting sleeve 6 at the end of the bottom plate 1 through the cover plate's extended reinforcing bar 93. After the web plate 2 is connected and assembled along its length, the web plate 2 is connected to the bottom plate 1 through the grouting sleeve 6. At the same time, the grouting sleeve 6 of the web plate 2 and the cover plate 4 is connected, and the casting trench assembly is completed.

[0093] The base plate 1, web plate 2, and cover plate 4 are assembled using built-in concrete cavity grouting sleeves and connecting steel bars. After the formwork assembly is completed, it is placed as follows: Figure 3 The steel cage shown is equipped with a tension restraint assembly 3, and the core concrete is poured in a casting trench formed by the web plate 2, the bottom plate 1, and the cover plate 4.

[0094] The base plate 1, web plate 2 and cover plate 4 are all made of ultra-high performance concrete (UHPC), which can effectively ensure the strength and durability of the formwork.

[0095] like Figure 10As shown, the grouting sleeve 6 is made of ultra-high performance concrete. The grouting sleeve has grouting holes 61 and overflow holes 62. Interlocking grooves are provided inside the grouting cavity to enhance the interlocking force with the connecting reinforcing bars. The grouting sleeves are respectively installed in the cover plate 4, web plate 2, and bottom plate 1. During installation, it should be noted that the grouting holes 61 and overflow holes 62 of the grouting sleeve are both inside the pouring trench after the formwork installation is completed. During the factory prefabrication of the formwork unit, the plastic mold of the grouting sleeve is installed in the ordinary reinforcing bars. After the formwork unit is completed, the plastic mold is removed, and the ultra-high performance concrete grouting sleeve is completed.

[0096] To ensure that the strength of the cap beam formwork meets the construction requirements, it is necessary to perform bending, shear and bonding performance calculations on the connecting steel bars of the cap beam formwork.

[0097] In the strength calculation of the connecting steel bars, it is assumed that the grouting sleeve of the concrete cavity in the cap beam formwork will not fail before the connecting steel bars.

[0098] In the flexural strength calculation of the connecting reinforcement, assuming the number of connecting reinforcements in the bottom slab 1 is n, the tensile strength of the connecting reinforcements is... Cross-sectional area of ​​connecting steel bars If the formwork receives a uniformly distributed load q during construction, the length of the cap beam formwork is l, and the calculated bending moment height of the connecting reinforcement is y, then the number of connecting reinforcements n must satisfy the following calculation formula: (1)

[0099] In equation (1), .

[0100] In the shear strength verification of the connecting reinforcement, the number of connecting reinforcements n in the bottom slab 1 is determined, and the shear strength of the connecting reinforcements is... The most unfavorable shear load on the cap beam formwork during construction is The quantity n of the connecting reinforcement bars in the bottom slab 1 satisfies the following calculation formula: (2)

[0101] In equation (2), .

[0102] Assuming the number of reinforcing bars connected to base slab 1 is n, the bond strength between the grouting sleeve and the connecting reinforcing bars... Perimeter of the cross-section of the connecting steel bars Bonding length Tensile strength of connecting steel bars Cross-sectional area of ​​connecting steel bars Then the bond length of the connecting steel bars The following calculation formula is satisfied:

[0103] (3)

[0104] After completing the calculations for the bending, shear, and bond performance of the reinforcing bars connecting the cap beam formwork, it is important to compare the various calculated parameters and take the larger value to ensure the strength of the cap beam formwork and improve the construction safety of the formwork.

[0105] The working principle of the cap beam and construction method of the semi-prefabricated high-performance concrete formwork provided by the present invention is as follows: According to the design dimensions of the cap beam, a prefabricated steel cage is assembled with a bottom plate 1, a web plate 2, and a cap plate 4, and a concrete cavity grouting sleeve 6 and connecting steel bars are left at its end.

[0106] After transporting all components of the cap beam to the construction site, the bottom plate 1 with connection and installation holes is installed on top of the pier, and then the remaining bottom plates 1, web plates 2, and cap plates 4 are assembled in sequence. During assembly, the reinforcing bars of the components to be connected are inserted into the pre-set concrete cavity grouting sleeve of the connecting components, and the connection is achieved by injecting grout into the cavity.

[0107] The assembly method of the base plate 1 is as follows: the base plate 1 is sequentially connected to the outer reinforcing bars 9 of the base plate through the grouting sleeve 6 along the length direction of the base plate 1.

[0108] The assembly method of the web plate 2 is as follows: the web plate 2 is sequentially connected to the transverse outward reinforcing bars 92 of the web plate through the grouting sleeve 6 along the length direction of the web plate 2.

[0109] After the base plate 1 and web plate 2 are assembled on site, the formwork is assembled to form the casting trough:

[0110] After the bottom plate 1 is connected by the grouting sleeve, the cover plate 4 is first connected to the grouting sleeve 6 at the end of the bottom plate 1 by the cover plate extended steel bar 93. Then, the web plate 2 is connected to the bottom plate 1 by the web plate vertical extended steel bar 91 and the grouting sleeve 6 at both ends of the bottom plate 1 in the horizontal direction. At the same time, the web plate horizontal extended steel bar 92 is connected to the grouting sleeve 6 at both ends of the cover plate 4. The installation of the pouring trench is completed.

[0111] Lifting and lowering the steel cage: The pre-tied steel cage is lifted into the cavity enclosed by the formwork, and the pier steel bars and cap beam steel bars are connected by binding, welding and other methods.

[0112] Connection of tie rods: Pass the screw rods through the pre-set screw holes on the two pairs of side web plates 2, install the tie rod steel plates, tighten the bolts, and enhance the rigidity of both sides of the template enclosure cavity.

[0113] Concrete is poured into the cavity enclosed by the template, and after curing with water to the specified age, the cap beam is completed.

[0114] Compared with related technologies, the cap beam and construction method of the semi-prefabricated high-performance concrete formwork provided by the present invention have the following beneficial effects:

[0115] This invention enables the prefabricated production and installation of cap beam formwork. The cap beam formwork can be prefabricated and modularly produced in the factory, and the finished product can be hoisted and poured after being transported to the site, thus improving construction efficiency.

[0116] The cap beam formwork is made of ultra-high performance concrete (UHPC), which has outstanding advantages such as ultra-high compressive and tensile strength, ultra-high toughness, and ultra-high durability. It solves the problem of poor durability of ordinary concrete while reducing costs. Therefore, it is more suitable as a permanent cap beam formwork.

[0117] Furthermore, the base plate 1 and web plate 2 are divided into multiple components, which effectively reduces the difficulty of transportation and hoisting.

[0118] The components of this invention are simple and reasonable, and the production quality of the controls can be fully controlled during factory prefabrication.

[0119] In this invention, a cap beam formwork made of ultra-high performance concrete (UHPC) is used as a permanent formwork for pouring concrete, which eliminates the amount and cost of formwork work and simplifies the construction process. Example

[0120] Please refer to the following: Figure 11 , Figure 12 , Figure 13 and Figure 14 Based on the cap beam of the semi-prefabricated high-performance concrete formwork provided in the first embodiment of this application, the second embodiment of this application proposes another cap beam for the semi-prefabricated high-performance concrete formwork. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the separate implementation of the first embodiment.

[0121] Specifically, the difference in the cap beam of the semi-prefabricated high-performance concrete formwork provided in the second embodiment of this application is that, in the cap beam of the semi-prefabricated high-performance concrete formwork, one end of the web plate 2 is provided with a connector, and the other end of the web plate 2 is provided with an assembly hole 10. The connector includes a front end 20 and a rear end 30. The front end 20 of the connector includes an extended connector 21, and the surface of the extended connector 21 is provided with a spiral protrusion 22.

[0122] The distribution of the extended connector 21 and the assembly hole 10 is the same as the distribution of the vertical extended reinforcing bar 91 and the mounting hole 8 on the end of the web module and the middle block of the web module.

[0123] Multiple external connectors 21 are provided, with no fewer than five, and corresponding assembly holes 10 are provided.

[0124] One end of the extended connector 21 is connected to a connecting sleeve 23, and a connecting frame 24 is fixedly connected to one side of the connecting sleeve 23. The rear end 30 of the connector includes an outer cylinder 301, one end of which is rotatably connected to the inside of the connecting sleeve 23. An inner rod 35 is slidably connected inside the outer cylinder 301. A through hole 36 is provided on the inner rod 35. An annular groove 302 is provided on the outer cylinder 301. An embedded rod 303 is provided on one side of the outer cylinder 301. An annular protrusion is provided on the surface of the embedded rod 303. A connector head 37 is connected to the end of the inner rod 35. A connecting shaft 38 is fixed inside the connector head 37.

[0125] The connecting sleeve 23 is fixedly connected to a support shaft. One end of the outer cylinder 301 is fitted onto the surface of the support shaft by an assembly block. The height of the connecting frame 24 is much greater than the diameter of the connecting shaft 38. When the outer cylinder 301 is inserted into the rectangular cavity 11, the outer cylinder 301 rotates ninety degrees, and the connecting shaft 38 at its end can be better inserted into the connecting frame 24.

[0126] A rectangular cavity 11 is formed on one side of the inner wall of the assembly hole 10, and an embedding groove 12 is formed on one side of the inner wall of the rectangular cavity 11.

[0127] The height of the groove 12 is greater than the diameter of the annular protrusion 34. The embedded rod 303 is located at the end of the outer cylinder 301 away from the front end 20 of the connector, which increases the weight of the front end of the outer cylinder 301, making the weight of the front end greater than that of the rear end.

[0128] When connecting the webs 2, the rear end 30 of the connector of one web 2 is sequentially inserted into the assembly hole on the other web 2, and then the front end of the connector is fully inserted together.

[0129] At this time, the outer cylinder 301 is fully inserted into the rectangular cavity 11. Since the front end of the outer cylinder 301 is heavier than the rear end, it rotates downward until the inner side contacts the side wall of the rectangular cavity 11, that is, it is perpendicular to the front end 20 of the connector. At the same time, the inner rod 35 inside the outer cylinder 301 is directly drawn, and the connecting shaft 38 inside the connector 37 at the end can be inserted into the interior of the connecting frame 24. At the same time, the embedded rod 303 is inserted into the interior of the embedded groove 12. Then, concrete can be filled into the interior of the rectangular cavity 11 through the grouting hole 61. The concrete enters the assembly hole and the embedded groove 12 at the same time. When the concrete flows out from the overflow hole 62, the cavity is filled with concrete.

[0130] The connection between the connecting shaft 38, the connecting frame 24, and the concrete allows multiple connectors to be better connected as a whole. The rear end 30 of the connector is set at a 90-degree angle to the front end 20 of the connector and is pressed together inside the rectangular cavity 11. The setting of the embedded rod 303, the embedded groove 12, the spiral protrusion 22, and the annular protrusion 34 can all improve the stability of the connection position between the web plates 2 and greatly improve the strength of the connection of the web plates 2.

[0131] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A cap beam for a semi-prefabricated assembled high-performance concrete formwork, characterized in that, include: The base plate is composed of multiple base plate module end blocks and base plate module intermediate blocks; The web plate is composed of multiple web plate module end blocks and multiple web plate module intermediate blocks. Multiple tension constraint components are disposed on the end block and the intermediate block of the web module; Two cover plates are respectively disposed on both sides of the web plate; The bottom plate, web plate, and cover plate are connected by grouting through end connectors to form an enclosed cavity of the template, and a steel cage is installed inside the enclosed cavity. One end of the web is provided with a connector, and the other end of the web is provided with an assembly hole. The connector includes a front end and a rear end. The front end of the connector includes an extended connector, and the surface of the extended connector is provided with spiral protrusions. One end of the extended connector is connected to a connecting sleeve, and a connecting frame is fixedly connected to one side of the connecting sleeve. The rear end of the connector includes an outer cylinder, one end of which is rotatably connected to the inside of the connecting sleeve. An inner rod is slidably connected inside the outer cylinder, and a through hole is provided on the inner rod. An annular groove is provided on the outer cylinder. An embedded rod is provided on one side of the outer cylinder, and an annular protrusion is provided on the surface of the embedded rod. A connector is connected to the end of the inner rod, and a connecting shaft is fixed inside the connector. A rectangular cavity is formed on one side of the inner wall of the assembly hole, and an embedding groove is formed on one side of the inner wall of the rectangular cavity.

2. The cap beam of the semi-prefabricated assembled high-performance concrete formwork according to claim 1, characterized in that, The two ends of the middle block of the base plate module are respectively provided with base plate protruding steel bars and mounting holes. One end of the base plate module end block is provided with mounting holes, and the other end of the base plate module end block is provided with base plate protruding steel bars.

3. The cap beam of the semi-prefabricated assembled high-performance concrete formwork according to claim 1, characterized in that, The end block of the web module and the middle block of the web module are respectively provided with vertical and horizontal outward reinforcing bars of the web. The other end of the middle block of the web module is provided with an installation hole.

4. The cap beam of the semi-prefabricated assembled high-performance concrete formwork according to claim 1, characterized in that, One side of the cover plate is provided with an extended reinforcing bar, and one end of the cover plate is provided with a grouting sleeve. The grouting sleeve includes a grouting hole, an overflow hole, and a grouting cavity. The grouting hole and the overflow hole are both connected to the interior of the grouting cavity.

5. The cap beam of the semi-prefabricated assembled high-performance concrete formwork according to claim 1, characterized in that, The base plate has an installation groove, and the interior of the installation groove has an installation hole for connecting with the bridge pier.

6. The cap beam of the semi-prefabricated assembled high-performance concrete formwork according to claim 1, characterized in that, The tension restraint assembly includes two steel plates, with a tension rod running through the two steel plates. One side of each of the two steel plates is threadedly connected to the tension rod via tension bolts.

7. A construction method for a cap beam using a semi-prefabricated assembled high-performance concrete formwork as described in any one of claims 1-6, characterized in that, Includes the following steps: S1: Prefabrication of cap beam components: According to the design dimensions of the cap beam, prefabricate the steel cage, bottom plate, web plate and cap plate, and leave concrete cavity grouting sleeves and connecting steel bars at the ends; S2, Cap Beam Assembly: After transporting each cap beam component to the construction site, the bottom plate with connection and installation holes is installed on the top of the pier, and then the bottom plate, web plate and cap plate are assembled in sequence; during assembly, the steel bars are inserted into the pre-set concrete cavity grouting sleeve, and the connection is achieved by injecting grout into the cavity; S3: Lifting and lowering the steel cage: The pre-tied steel cage is lifted into the enclosed cavity of the formwork, and the pier steel bars and cap beam steel bars are connected by binding and welding. S4: Connection of tie rods: Pass the screw rods through the pre-set screw holes on the two pairs of side webs, install the tie plates, tighten the bolts, and enhance the rigidity of both sides of the template enclosure cavity; S5: Pour concrete into the cavity enclosed by the template, and after curing with water to the specified age, complete the fabrication of the cap beam.

Images