Beam side external prestress reinforcement device for large-span and large-section house concrete beam

Abstract

The utility model discloses a large -span big section house concrete beam's beam side body external prestress reinforcing device, include: concrete support, including installing in the opposite both sides of house concrete beam's two end's anchoring support and installing in two the intermediate of the both sides turning support, the turning support set up in the below of anchoring support, the anchoring support with the turning support in respectively burying have pre -buried sleeve, protective sleeve, wear and set in the pre -buried sleeve of anchoring support with the turning support, pre -stress steel strand bundle, wear and set in the protective sleeve, the protective sleeve has poured and grouted grout, and the post -poured grout is covered in pre -stress steel strand bundle. The utility model has solved the problem that the reinforcing support piece set in the beam bottom of the house concrete beam adopts the external prestress reinforcement and occupies the building net height.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, specifically to an external prestressing reinforcement device for the side of a large-span, large-section concrete beam of a building. Background Technology

[0002] Currently, large-span, large-section concrete beams are very common in building construction. Over time, due to the continuous accumulation of structural defects and damage, or changes in usage, the load-bearing capacity of concrete beams may become insufficient. Therefore, it is necessary to reinforce concrete beams in a timely manner to ensure their structural safety.

[0003] Common concrete beam reinforcement techniques include cross-section enlargement, steel plate bonding, and carbon fiber reinforcement. External prestressing reinforcement is primarily used for bridge structures, less so for building construction. Traditional external prestressing techniques have several drawbacks: exposed prestressed steel strands or reinforcing bars make corrosion and rust prevention relatively difficult; reinforcement supports are required at the bottom of the beam, reducing building height; and the increased load-bearing capacity after reinforcement is limited, resulting in poor reinforcement effectiveness.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, a prestressed reinforcement device for the side of large-span, large-section concrete beams is provided to solve the problem of reinforcement supports at the bottom of the beam occupying the building's net height when using prestressed reinforcement for concrete beams.

[0006] To achieve the above objectives, a prestressed reinforcement device for the beam side of a large-span, large-section concrete beam is provided, comprising:

[0007] The concrete support includes anchor supports installed at both ends of opposite sides of a concrete beam of a building and a turning support installed in the middle of the two sides. The elevation of the turning support is lower than that of the anchor supports. Pre-embedded sleeves are embedded in the anchor supports and the turning supports respectively.

[0008] The protective sleeve is installed in the pre-embedded sleeve in the anchor support and the steering support;

[0009] The prestressed steel strand bundle is threaded through the protective sleeve, and the protective sleeve is filled with post-cast grout, which covers the prestressed steel strand bundle.

[0010] Furthermore, the steering support includes:

[0011] The first reinforcing steel structure includes a first transverse steel bar, a first longitudinal steel bar, a first transverse stirrup, and a first longitudinal stirrup. The first transverse steel bar is arranged along the height direction of the concrete beam of the building, and the first longitudinal steel bar is arranged along the length direction of the concrete beam of the building. The two ends of the first transverse steel bar and the two ends of the first longitudinal steel bar respectively form bent portions inserted into the side. The first transverse stirrup is attached to the first longitudinal steel bar, and the first longitudinal stirrup is attached to the bent portion of the first transverse steel bar.

[0012] The first concrete is used to encapsulate the first steel reinforcement structure.

[0013] Furthermore, the anchoring support includes:

[0014] The second reinforcing steel structure includes a second transverse steel bar, a second longitudinal steel bar, a second transverse stirrup, and a second longitudinal stirrup. The second transverse steel bar is arranged along the height direction of the concrete beam of the building, and the second longitudinal steel bar is arranged along the length direction of the concrete beam of the building. The two ends of the second transverse steel bar and the two ends of the second longitudinal steel bar respectively form bent portions inserted into the side. The second transverse stirrup is attached to the second longitudinal steel bar, and the second longitudinal stirrup is attached to the bent portion of the second transverse steel bar. There are two second transverse steel bars with different lengths. The shorter second transverse steel bar is centrally located in the middle of the longer second transverse steel bar. The bent portion of the shorter second transverse steel bar is connected to a tie bar.

[0015] The second concrete is used to encapsulate the second steel reinforcement structure;

[0016] The third reinforcing steel structure is set at the opposite ends of the two anchorage supports. One end of the third reinforcing steel structure is embedded in the second concrete, and the other end of the third reinforcing steel structure is covered with sealing concrete. The end anchor of the prestressed steel strand bundle is embedded in the sealing concrete.

[0017] Furthermore, the pre-embedded sleeve is a steel sleeve, and the two ends of the steel sleeve in the steering bearing are flared.

[0018] Furthermore, the protective sleeve is an HDPE sleeve.

[0019] The beneficial effects of this utility model are that the external prestressed reinforcement device for large-span, large-section concrete beams of this utility model strengthens the concrete beams by symmetrically setting concrete anchor supports and turning supports on both sides of the beam and using external prestressed steel strand bundles. It is particularly suitable for strengthening large-span, large-section concrete beams, providing a safe and reliable reinforcement method and technology for engineering projects.

[0020] The external prestressed reinforcement device for the side of large-span, large-section concrete beams of this utility model uses reinforced concrete anchor supports and transfer supports. Compared with steel structure anchor supports and transfer supports, it does not require factory customization, and on-site construction is flexible, convenient, and low-cost.

[0021] The external prestressing reinforcement device for large-span, large-section concrete beams of this utility model uses protective sleeves for grouting to protect the steel strand bundles, and the anchor ends are sealed, which overcomes the problem of easy corrosion and rust of traditional external prestressing reinforcement of prestressed steel strand bundles or prestressing tendons, and improves durability.

[0022] The anchorage and steering supports of the external prestressed reinforcement device for large-span, large-section concrete beams of this invention are located on the side of the concrete beam, without affecting the building's clearance. Attached Figure Description

[0023] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0024] Figure 1 This is a schematic diagram of the external prestressing reinforcement device for the side of a large-span, large-section concrete beam of a building, according to an embodiment of this utility model.

[0025] Figure 2 This is a structural schematic diagram of the anchor support according to an embodiment of the present utility model.

[0026] Figure 3 for Figure 2 The sectional view at point AA.

[0027] Figure 4 for Figure 3 The sectional view at point BB.

[0028] Figure 5 for Figure 4 The sectional view at point CC.

[0029] Figure 6 This is a schematic diagram of the structure of the steering support according to an embodiment of the present utility model.

[0030] Figure 7 for Figure 6 The sectional view at point DD.

[0031] Figure 8 for Figure 7 The sectional view at EE.

[0032] Figure 9 for Figure 8 The sectional view at FF in the diagram.

[0033] Figure 10 This is a schematic diagram illustrating the tensioning sequence of the prestressed steel strand bundle according to an embodiment of the present invention. Reference numerals:

[0034] Steering bearing 11, transverse reinforcement 111, first longitudinal reinforcement 112, first transverse stirrup 113, first longitudinal stirrup 114, first concrete 115, anchorage bearing 12, second transverse reinforcement 121, second longitudinal reinforcement 122, second transverse stirrup 123, second longitudinal stirrup 124, tie bar 125, second concrete 126, third reinforcement structure 127, anchorage concrete 128, bend 129, embedded sleeve 13;

[0035] Protective sleeve 2;

[0036] 3. Prestressed steel strand bundle; 31. Anchorage;

[0037] 4 concrete beams in the building;

[0038] Floor 5;

[0039] Column 6. Detailed Implementation

[0040] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0041] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0042] Reference Figures 1 to 9 As shown, this utility model provides an external prestressed reinforcement device for the side of a large-span, large-section concrete beam of a building, including: a concrete support, a protective sleeve 2, and a prestressed steel strand bundle 3.

[0043] In this embodiment, the two ends of the building concrete beam 4 are connected to the columns 6. A floor slab 5 is poured on the building concrete beam 4.

[0044] Concrete supports are installed on opposite sides of the concrete beams of the building in the width direction. Specifically, the concrete supports include steering supports 11 and anchor supports 12. Each floor of the concrete beams of the building is equipped with two anchor supports and one steering support.

[0045] Anchor supports 12 are installed at both ends of opposite sides of the concrete beam 4 of the building.

[0046] Steering bearings 11 are installed at the midpoint of both sides of the concrete beams of the building. Horizontally, the elevation of the steering bearings 11 is lower than that of the anchor bearings 12. Embedded sleeves 13 are installed in both the anchor bearings 12 and the steering bearings 11. The ends of the embedded sleeves in the steering bearings are flared.

[0047] The protective sleeve 2 is installed in the pre-embedded sleeve 13 in the anchor support 12 and the steering support 11.

[0048] The prestressed steel strand bundle 3 is inserted into the protective sleeve 2. The protective sleeve 2 is filled with post-cast grout. The post-cast grout covers the prestressed steel strand bundle 3.

[0049] See Figures 6 to 9 As shown, the steering support 11 includes a first steel reinforcement structure and a first concrete 115.

[0050] Specifically, the first steel reinforcement structure includes a first transverse steel bar 111, a first longitudinal steel bar 112, a first transverse stirrup 113, and a first longitudinal stirrup 114.

[0051] The first transverse reinforcing bar 111 is installed along the height direction of the concrete beam 4 of the building. The first longitudinal reinforcing bar 112 is installed along the length direction of the concrete beam 4 of the building. The two ends of the first transverse reinforcing bar 111 and the two ends of the first longitudinal reinforcing bar 112 respectively form bent portions 129 embedded in the side.

[0052] The two ends of the first transverse reinforcing bar 111 are bent toward the inside of the concrete beam to form a bend 129. The bend 129 of the first transverse reinforcing bar 111 is inserted into the side of the concrete beam.

[0053] The two ends of the first longitudinal steel bar 112 are bent toward the interior of the concrete beam to form a bend 129. The bend 129 of the longitudinal steel bar 112 forms the side of the concrete beam.

[0054] In this embodiment, the first transverse reinforcement and the first longitudinal reinforcement are U-shaped as a whole.

[0055] See Figure 7 As shown, there are multiple first longitudinal reinforcing bars. First transverse stirrups 113 are attached to multiple first longitudinal reinforcing bars 112. There are multiple first transverse stirrups. These multiple first transverse stirrups are spaced apart along the length of the first longitudinal reinforcing bars. (See reference...) Figure 9 As shown, there are multiple first transverse reinforcing bars. First longitudinal stirrups 114 are attached to the bends 129 of the multiple first transverse reinforcing bars 111. There are multiple first longitudinal stirrups. These multiple first longitudinal stirrups are spaced apart along the length of the bends.

[0056] The first concrete 115 is wrapped around the first steel reinforcement structure to form a steering bearing.

[0057] See Figures 2 to 5 As shown, the anchorage support 12 includes: a second steel reinforcement structure, a second concrete 126, a third steel reinforcement structure 127, and an anchor sealing concrete 128.

[0058] Specifically, the second reinforcing steel structure includes a second transverse reinforcing bar 121, a second longitudinal reinforcing bar 122, a second transverse stirrup 123, and a second longitudinal stirrup 124.

[0059] See Figure 3 As shown, the second transverse reinforcement 121 is installed along the height of the concrete beam 4 of the building. There are multiple second transverse reinforcements. These multiple second transverse reinforcements are spaced apart along the length of the embedded sleeve.

[0060] See Figure 5 As shown, the second longitudinal reinforcement 122 is installed along the length of the concrete beam 4 of the building. There are multiple layers of the second longitudinal reinforcement. These multiple layers of second longitudinal reinforcement are spaced apart along the thickness direction of the anchorage support.

[0061] The two ends of the second transverse reinforcing bar 121 are respectively formed into bent portions 129 for insertion into the side. The two ends of the second transverse reinforcing bar are respectively bent towards the inside of the building concrete beam to form bent portions 129. The bent portions 129 of the second transverse reinforcing bar are inserted into the inside of the building concrete beam.

[0062] The two ends of the second longitudinal steel bar 122 are respectively formed into bent portions 129 for insertion into the side. The two ends of the second longitudinal steel bar 122 are respectively bent towards the inside of the building concrete beam to form bent portions 129. The bent portions 129 of the second longitudinal steel bar 122 are inserted into the inside of the building concrete beam.

[0063] In this embodiment, the second transverse reinforcement and the second longitudinal reinforcement are U-shaped as a whole.

[0064] The second transverse stirrup 123 is attached to the second longitudinal reinforcement 122. Multiple second transverse stirrups are spaced apart along the length of the second longitudinal reinforcement.

[0065] In this embodiment, there are two second transverse reinforcing bars 121 in the thickness direction of the anchorage support. The two second transverse reinforcing bars 121 have different lengths. The shorter second transverse reinforcing bar 121 is centrally located in the middle of the longer second transverse reinforcing bar 121. The bent portion 129 of the shorter second transverse reinforcing bar 121 is connected to a connecting bar 125.

[0066] The second longitudinal stirrup 124 is attached to the bend 129 of the second transverse reinforcement 121. Multiple second longitudinal stirrups are spaced apart along the length of the bend.

[0067] The second concrete 126 is used to encase the second steel reinforcement structure.

[0068] The third reinforcing steel structure 127 is located at the opposite ends of the two anchorage supports 12. One end of the third reinforcing steel structure 127 is embedded in the second concrete 126. The other end of the third reinforcing steel structure 127 is covered with sealing concrete 128. The end anchorage 31 of the prestressed steel strand bundle 3 is embedded in the sealing concrete 128.

[0069] Specifically, after the second concrete is poured for the anchorage support, the prestressed steel strand bundle is installed. After grout is poured into the protective sleeve, the third concrete is poured to seal the anchorage 31 at the end of the prestressed steel strand bundle in the anchorage support.

[0070] Before the anchoring support and the steering support are poured, the pre-embedded sleeve is embedded in the anchoring support and the steering support. Among them, the pre-embedded sleeve 13 is a steel sleeve.

[0071] After the anchorage and steering bearings are poured, protective sleeves are inserted into the pre-embedded sleeves of the anchorage and steering bearings, and then prestressed steel strand bundles are inserted. The steel strand bundles are then tensioned, and finally, grout is poured into the protective sleeves. Anchoring concrete is then poured at the rear of the anchorage. Preferably, the protective sleeve 2 is an HDPE (high-density polyethylene) sleeve.

[0072] In this embodiment, the concrete beam of the building is 23.0m long, 1800mm high, 1200mm wide, and has a concrete strength of C40.

[0073] The reinforcement method of the external prestressed reinforcement device for the beam side of large-span, large-section concrete beams of this utility model includes the following steps:

[0074] S1. Anchor supports are installed on the sides of both ends of the concrete beams of the building.

[0075] 1) Lay out and locate the anchorage support position. The anchorage support is 1500mm from the end of the concrete beam. The length b1 of the anchorage support is 1450mm, the height a1 is 800mm, the width w1 is 430mm, the horizontal angle between the bottom edge of the anchorage support and the bottom edge of the beam is 4.2°, and the height h1 of the bottom edge of the anchorage support from the bottom of the beam is 400mm, and h2 is 295mm.

[0076] 2) Drill holes on the side of the concrete beam of the building according to the required depth of the rebar and clean the holes. The drilling depth d1 is 400mm. The number and location of the holes are determined according to the arrangement of the second transverse rebar and the second longitudinal rebar.

[0077] 3) The surface of the concrete beam at the anchorage support location must be roughened and cleaned, with a surface roughness of ≥6mm.

[0078] 4) Using anchoring adhesive, the bent parts of the second transverse steel bar (20mm in diameter, 150mm in spacing) and the second longitudinal steel bar (20mm in diameter, 4 bars) are sequentially inserted into the concrete beam of the building. The steel bars are grade III HRB400 steel.

[0079] 5) Then tie the remaining reinforcement bars of the anchorage support, the second transverse stirrups (16mm in diameter, 150mm in spacing), the second longitudinal stirrups (16mm in diameter, 2 bars), the second longitudinal reinforcement bars (16mm in diameter, 4 bars), and the longitudinal reinforcement bars of the anchorage sealing area (16mm in diameter, 4 bars). The reinforcement bars are grade III HRB400 steel.

[0080] 6) Install anchor 31, steel sleeve (diameter 140mm, wall thickness 4mm) and the first HDPE sleeve at the end (diameter 110mm, wall thickness 5mm). The HDPE sleeve passes through the steel sleeve and is directly connected to anchor 31.

[0081] 7) Cast formwork, pour concrete for anchoring supports and cure the concrete to a strength of C45.

[0082] S2. Steering supports are installed on the sides of both ends of the concrete beams of the building.

[0083] 1) Lay out and locate the turning support position; the turning support is located at the mid-span of the concrete beam of the building, with a length b2 of 1000mm, a2 of 400mm, and a width w2 of 350mm. The bottom edge of the turning support is parallel to the bottom edge of the beam, and the height h3 between the bottom edge of the support and the bottom of the beam is 40mm.

[0084] 2) Drill holes on the side of the concrete beam of the building according to the required depth of the rebar and clean the holes. The drilling depth d2 is 320mm. The number and location of the holes are determined according to the arrangement of the transverse reinforcing bars 2 and the longitudinal reinforcing bars 3.

[0085] 3) The surface of the concrete beam at the steering bearing location must be roughened and cleaned, with a surface roughness of ≥6mm.

[0086] 4) Using anchoring adhesive, the bent portions of the first transverse and first longitudinal reinforcing bars are sequentially inserted into the concrete beam. The reinforcing bars are Grade III HRB400 steel.

[0087] 5) Then tie the remaining reinforcing bars of the steering bearing, the first transverse stirrup (diameter 12mm, spacing 150mm) and the first longitudinal stirrup (diameter 16mm, 2 bars), the reinforcing bars are grade III HRB400 steel.

[0088] 6) Install steel sleeve (140mm in diameter, 4mm in wall thickness), with the ends of the steel sleeve flared out.

[0089] 7) Cast formwork, pour concrete for the steering bearing, and cure it. The concrete strength is C45.

[0090] S3. Install the HPDE sleeve at the steering support.

[0091] The HPDE sleeve (110mm in diameter and 5mm in wall thickness) is passed through the steel sleeve pre-embedded in the steering bearing and connected to the first HPDE sleeve pre-embedded in the anchor bearing through heat shrink tubing.

[0092] S4. Install the prestressed steel strand bundles.

[0093] The prestressed steel strand bundle is inserted into the HPDE sleeve from one end anchor 31 and exits from the other end anchor 31. There are a total of 13 steel strands, which are numbered 1-13 on the anchor 31. Each strand has a diameter of 15.7 mm, an effective cross-sectional area of ​​150 mm2, and an ultimate tensile strength of 1860 MPa.

[0094] S5, tensioned prestressed steel strand bundle.

[0095] Once the concrete strength of the support reaches the design requirements, jacks are used to tension the prestressed steel strands, with the tensioning control stress being 75% of the ultimate tensile strength of the steel strands.

[0096] Tensioning principles and sequence:

[0097] 1) The prestressed steel strand bundles on both sides of the concrete beam need to be tensioned symmetrically and synchronously;

[0098] 2) The steel strand is tensioned at both ends. First, it is tensioned from one end (anchor end A) to 25% of the design tension, then from the other end (anchor end B) to 50%, then from anchor end A to 75%, and finally from anchor end B to 100%.

[0099] 3) Tensioning of each steel strand should be carried out symmetrically from the center outwards, such as... Figure 10 As shown, the steel strands from No. 1 to No. 13 are tensioned sequentially.

[0100] S6. Grouting.

[0101] 1) Before grouting, an air pressure test is first used to ensure that the HPDE sleeve connection is tight and leak-proof.

[0102] 2) Use a certain brand of grouting material with a maximum aggregate size of 1.2mm and a compressive strength of 50MPa. Proportion according to the technical card requirements. Use a grouting pump to grout from the grouting hole reserved on one end of the anchor 31. The pumping pressure shall not exceed 1.5MPa until the grout flows out stably and evenly from the grouting hole of the other end of the anchor 31, ensuring that the HPDE sleeve is completely filled with grouting material without gaps.

[0103] S7, Anchor Sealing.

[0104] The length of the sealing zone b3 is 250mm. After the grout reaches the design strength, the sealing stirrups (12mm in diameter and 200mm apart) are tied in the sealing zone behind the anchor support. The formwork is then erected and concrete is poured to protect the anchor 31 and its accessories.

[0105] In this embodiment, the anchorage support is made of cast-in-place concrete and is connected to the side of the concrete beam to form an integral whole through rebar installation. Its main function is to provide a support point for external prestressing tensioning. The main reinforcing bars configured inside the anchorage support include: a second transverse reinforcing bar (embedded in the concrete beam) and a second longitudinal reinforcing bar (embedded in the concrete beam). Their main function is to transfer the tensioning support reaction force borne by the anchorage support to the concrete beam, while ensuring the structural safety of the anchorage support itself under the action of the tensioning support reaction force.

[0106] In this embodiment, the steering bearing is made of cast-in-place concrete and is connected to the side of the concrete beam to form an integral whole through rebar installation. It provides steering for the externally prestressed steel strand bundles and transmits the tension force to the concrete beam, improving the mid-span cross-sectional bearing capacity of the concrete beam, reducing mid-span deflection, and thus functioning as a building concrete beam. The main reinforcing bars inside the steering bearing include: first transverse reinforcing bars (embedded in the concrete beam), first longitudinal reinforcing bars (embedded in the concrete beam), first transverse stirrups, and first longitudinal stirrups. Their main function is to transmit the tension force provided by the externally prestressed steel strand bundles to the concrete beam, while ensuring the structural safety of the steering bearing itself under tension.

[0107] In this embodiment, the pre-embedded sleeves are embedded in the anchoring supports and the steering supports. The special pre-embedded sleeves are designed with a flared shape at both ends of the steering supports. This design primarily facilitates the later construction of the HPDE sleeves and prestressed steel strand bundles, while also preventing stress concentration during the tensioning of the prestressed steel strand bundles and protecting the concrete supports from compression damage.

[0108] In this embodiment, the prestressed steel strand bundles are arranged inside the HPDE sleeve. After the external prestressing is completed, the HPDE sleeve is filled with grout from one end of the anchor to protect the prestressed steel strand bundles, prevent corrosion and rust, and improve the durability of the steel strands.

[0109] In this embodiment, after the external prestressing tensioning and grouting are completed, a sealing zone is set at the end of the anchor support, using cast-in-place concrete, to protect the anchor and its accessories, prevent corrosion and rust, and improve the durability of the anchor.

[0110] This utility model relates to an external prestressed reinforcement device for large-span, large-section concrete beams. By symmetrically setting concrete anchor supports and turning supports on both sides of the beam, and using external prestressed steel strand bundles, the concrete beam is reinforced. It is particularly suitable for the reinforcement of large-span, large-section concrete beams, providing a safe and reliable reinforcement method and technology for engineering projects.

[0111] The external prestressed reinforcement device for the side of large-span, large-section concrete beams of this utility model uses reinforced concrete anchor supports and transfer supports. Compared with steel structure anchor supports and transfer supports, it does not require factory customization, and on-site construction is flexible, convenient, and low-cost.

[0112] The external prestressed reinforcement device for large-span, large-section concrete beams of this utility model uses prestressed steel strand bundles instead of single prestressed steel strand bundles or prestressed tendons. This simplifies the force distribution and provides a clear force transmission path, effectively improving the bending capacity of the beam mid-span cross section and reducing the beam mid-span deflection. This solves the problem of limited effectiveness of traditional external prestressed reinforcement.

[0113] The external prestressing reinforcement device for large-span, large-section concrete beams of this utility model uses protective sleeves for grouting to protect the steel strand bundles, and the anchor ends are sealed, which overcomes the problem of easy corrosion and rust of traditional external prestressing reinforcement of prestressed steel strand bundles or prestressing tendons, and improves durability.

[0114] The anchorage and steering supports of the external prestressed reinforcement device for large-span, large-section concrete beams of this invention are located on the side of the concrete beam, without affecting the building's clearance.

[0115] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A prestressed reinforcement device for the side of a large-span, large-section concrete beam in a building, characterized in that, include: The concrete support includes anchor supports installed at both ends of opposite sides of a concrete beam of a building and a turning support installed in the middle of the two sides. The elevation of the turning support is lower than that of the anchor supports. Pre-embedded sleeves are embedded in the anchor supports and the turning supports respectively. The protective sleeve is installed in the pre-embedded sleeve in the anchor support and the steering support; The prestressed steel strand bundle is threaded through the protective sleeve, and the protective sleeve is filled with post-cast grout, which covers the prestressed steel strand bundle.

2. The external prestressed reinforcement device for the beam side of a large-span, large-section concrete beam of a building according to claim 1, characterized in that, The steering support includes: The first reinforcing steel structure includes a first transverse steel bar, a first longitudinal steel bar, a first transverse stirrup, and a first longitudinal stirrup. The first transverse steel bar is arranged along the height direction of the concrete beam of the building, and the first longitudinal steel bar is arranged along the length direction of the concrete beam of the building. The two ends of the first transverse steel bar and the two ends of the first longitudinal steel bar respectively form bent portions inserted into the side. The first transverse stirrup is attached to the first longitudinal steel bar, and the first longitudinal stirrup is attached to the bent portion of the first transverse steel bar. The first concrete is used to encapsulate the first steel reinforcement structure.

3. The external prestressed reinforcement device for the side of a large-span, large-section concrete beam of a building according to claim 1, characterized in that, The anchorage support includes: The second reinforcing steel structure includes a second transverse steel bar, a second longitudinal steel bar, a second transverse stirrup, and a second longitudinal stirrup. The second transverse steel bar is arranged along the height direction of the concrete beam of the building, and the second longitudinal steel bar is arranged along the length direction of the concrete beam of the building. The two ends of the second transverse steel bar and the two ends of the second longitudinal steel bar respectively form bent portions inserted into the side. The second transverse stirrup is attached to the second longitudinal steel bar, and the second longitudinal stirrup is attached to the bent portion of the second transverse steel bar. There are two second transverse steel bars with different lengths. The shorter second transverse steel bar is centrally located in the middle of the longer second transverse steel bar. The bent portion of the shorter second transverse steel bar is connected to a tie bar. The second concrete is used to encapsulate the second steel reinforcement structure; The third reinforcing steel structure is set at the opposite ends of the two anchorage supports. One end of the third reinforcing steel structure is embedded in the second concrete, and the other end of the third reinforcing steel structure is covered with sealing concrete. The end anchor of the prestressed steel strand bundle is embedded in the sealing concrete.

4. The external prestressed reinforcement device for the beam side of a large-span, large-section concrete beam of a building according to claim 1, characterized in that, The pre-embedded sleeve is a steel sleeve, and the two ends of the steel sleeve in the steering bearing are flared.

5. The external prestressed reinforcement device for the side of a large-span, large-section concrete beam of a building according to claim 1, characterized in that, The protective sleeve is an HDPE sleeve.

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