Structure for reinforcing the transverse connection of plate girders and method for its construction
By setting limiting components and tenon structures inside the precast slab beams, the problem of easy damage to the hinge joints of the precast slab beams is solved, and stronger lateral connection and overall load-bearing performance are achieved, making it suitable for new construction and reinforcement projects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- BEIJING MUNICIPAL ENG RES INST
- Filing Date
- 2023-05-30
- Publication Date
- 2026-06-26
AI Technical Summary
The existing hinge joints of precast slab beams are prone to damage, resulting in weakened lateral connections and making it difficult to guarantee project quality.
By employing limiting components and tenon structures, limiting grooves are set in adjacent beams and tenons are inserted to form mechanical interlocking force to enhance lateral connection. The use of materials such as epoxy resin is combined to improve fixation.
It improves the lateral working capacity of multi-precast slab beam connection structures, enhances the overall stress performance, reduces tensile damage to hinge joints, and is cost-effective and suitable for new construction and reinforcement projects.
Smart Images
Figure CN116607395B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of slab beam construction technology, and in particular to a structure for strengthening the transverse connection of slab beams and its construction method. Background Technology
[0002] Precast slab beams are simple in structure, economical in cost, and easy to construct, thus they have been widely used in civil engineering and bridge construction in my country since the 1980s. Due to structural limitations, when multiple precast slab beams share external vertical loads, the deflection and rotation of adjacent beams at the hinge joints can affect each other. The rotation of the precast slab beams generates lateral horizontal displacement, which is transferred to adjacent beams through the hinge joints and the paving material. In the cross-section of the structure composed of multiple precast slab beams, the upper surface of the beams exhibits flexural compressive stress, while the corresponding lower surface experiences flexural tensile stress. The commonly used lateral connection method for precast slab beams is the tongue-and-groove concrete hinge joint; however, with increasing service life, damage to these joints is a common phenomenon.
[0003] Existing hinged joint connection technology for slab beams involves binding the protruding ring-shaped reinforcing bars from two adjacent precast slab beams together, then pouring the mixture into the pavement layer, and filling the hinge with fine aggregate concrete to allow each slab to share the load, which can provide some benefit. However, the hinge joint is narrow, often making it impossible to ensure proper concrete compaction. Furthermore, the shrinkage and creep of the concrete weaken the lateral connection between the hinge joint and the adjacent precast slab beams, making it difficult to guarantee the quality of the project. Summary of the Invention
[0004] The purpose of this invention is to provide a structure and construction method for strengthening the lateral connection of slab beams, thereby improving the lateral working capacity of multi-precast slab beam connection structures and solving the problem of easy damage to hinge joints in existing technologies. 。 The preferred technical solutions among the many technical solutions provided by this invention can produce a variety of technical effects, which are described in detail below.
[0005] To achieve the above objectives, the present invention provides the following technical solution:
[0006] The present invention provides a structure for strengthening the lateral connection of slab beams, comprising a limiting member one, a limiting member two, and a tenon structure, wherein the limiting member one and the limiting member two are respectively disposed in two adjacent slab beams; when the limiting member one and the limiting member two are respectively disposed in adjacent slab beams, a limiting groove is formed between the limiting member one and the limiting member two, and the limiting groove is the area between the two slab beams; a portion of the tenon structure is inserted into the limiting groove.
[0007] Furthermore, the longitudinal reinforcing bars in the slab beam pass through the first limiting member and the second limiting member; or, anchoring reinforcing bars are provided on the first limiting member and the second limiting member.
[0008] Furthermore, the limiting component one and the limiting component two have the same structure, and both the limiting component one and the limiting component two are block structures; the tenon structure is an integral structure or a split structure, and the corners of the limiting component one, the limiting component two and the tenon structure are blunt chamfered.
[0009] Furthermore, the latch structure includes a first latch portion and a second latch portion. The first latch portion is disposed within the limiting groove and its shape matches the limiting groove. The second latch portion is located outside the limiting groove, and the cross-sectional area between the first latch portion and the second latch portion is minimized.
[0010] Furthermore, the tenon structure is reinforced with rigid gaskets or locally injected with epoxy resin to improve fixation; the portion of the tenon structure located outside the limiting groove can also serve as an anchor block or steering block for external prestressing.
[0011] This invention provides a construction method that employs the aforementioned structure for strengthening the transverse connection of slab beams. The construction method includes a prefabrication stage and an installation stage for the prefabricated slab beams: in the prefabrication stage, longitudinal reinforcing bars are passed through the pre-reserved holes of the reinforcing bars in limiting member one and limiting member two, and limiting member one and limiting member two are respectively spaced apart; in the installation stage, a tenon structure is installed in the limiting groove formed by limiting member one and limiting member two on two adjacent slab beams.
[0012] Furthermore, the prefabrication stage specifically includes the following steps:
[0013] Step 1: Preparations before precast beam processing;
[0014] Step 2, Rebar Binding: When binding the longitudinal reinforcement of the web, the longitudinal reinforcement is passed through the reserved holes of the first and second limiting members in advance, and then the reinforcement is bound. The first and second limiting members are set at intervals. After the reinforcement is fixed, the positions of the first and second limiting members are adjusted so that their bottom surfaces are flush with the bottom surface of the precast beam and fixed.
[0015] Step 3, Template Installation: During template installation, solid blocks are inserted between limiting component one and the template, and between limiting component two and the template, to isolate the concrete.
[0016] Step 4, Pouring and Curing: Pouring concrete into the slab beam inside the formwork. After the concrete is poured, curing, demolding, tensioning and installing the prestressing tendons are carried out in sequence, followed by beam relocation.
[0017] Step 5: Clean the grooves corresponding to limiting component 1 and limiting component 2.
[0018] Furthermore, the installation phase includes the following steps:
[0019] Step 1: Precast slab beam installation and positioning: Control the installation position of the precast slab beams, and the limiting components one and two of the adjacent precast slab beams form corresponding limiting grooves;
[0020] Step 2: Inspect and clean the limiting groove: Measure and inspect the installation dimensions of the limiting groove, and clean the surface of the limiting groove;
[0021] Step 3: Install and adjust the locking mechanism;
[0022] Step 4: Treatment of hinge joints in precast slab beams: treatment of hinge joint surfaces, reinforcement binding, installation of bottom formwork, and pouring of beams. Grout;
[0023] Step 5: Concrete pouring for the hinge joint of the precast slab: Pour the hinge joint concrete, cure the concrete, and form the transverse reinforcement device of the precast slab beam.
[0024] This invention provides a construction method, which employs the aforementioned structure for strengthening the transverse connection of slab beams, and includes the following:
[0025] Hinge joint processing and cleaning: The damaged hinge joint is ground down and some of the original concrete on the beam is removed to form the installation positions of limiting component one and limiting component two.
[0026] Install limiting component one and limiting component two;
[0027] Install and adjust the locking mechanism.
[0028] Furthermore, it specifically includes the following:
[0029] Step 1, Preparations before reinforcement: Determine the type, number, and installation location of the transverse reinforcement devices for the precast slab beams;
[0030] Step 2, hinge joint processing and cleaning: Grind the damaged hinge joint, remove some of the original concrete on the adjacent beams to form the installation positions of limiting component one and limiting component two, and drill anchor holes. After completion, remove the remaining debris.
[0031] Step 3, install limiting component 1 and limiting component 2: Clean the inner wall of the anchor hole, inject high-strength adhesive such as epoxy resin into the anchor hole, embed the anchoring steel bars for installing limiting component 1 and limiting component 2 into the anchor hole, and install limiting component 1 and limiting component 2 to form a limiting groove.
[0032] Step 4, Install and adjust the locking clip: Place the locking clip in the limiting groove and adjust it;
[0033] Step 5: Grouting the hinge joint;
[0034] Step 6: Remove the temporary sealant from the hinge joint; reinforcement is now complete.
[0035] One of the above technical solutions has at least one of the following advantages or beneficial effects:
[0036] 1. This structure is simple and inexpensive. In multi-precast slab beam structures, it can improve the overall load-bearing performance, ensure structural safety, and has minimal impact on the original slab beams. It can be applied to new construction and reinforcement projects.
[0037] 2. Installing transverse reinforcement devices at the hinge joints of adjacent slab beams converts the shear stress and transverse bending tensile stress at the hinge joints into mechanical interlocking forces, reducing tensile damage to the hinge joints. This does not conflict with the existing hinge joint structure and is a beneficial supplement to the existing transverse connection technology of precast slab beams.
[0038] 3. This device can be modified according to different needs. It is not only suitable for slab bridges, but also for connecting other similar engineering components. Attached Figure Description
[0039] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the 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.
[0040] Figure 1 This is a schematic diagram of a cooperating limiting member one and a limiting member two according to an exemplary embodiment 1;
[0041] Figure 2 yes Figure 1 Schematic diagram of the coordination between the middle limiting component 1 and the limiting component 2 and the longitudinal reinforcement;
[0042] Figure 3 This is a schematic diagram of a cooperating limiting member one and a limiting member two according to an exemplary embodiment 2;
[0043] Figure 4 yes Figure 3 Schematic diagram of the coordination between the middle limiting component 1 and the limiting component 2 and the longitudinal reinforcement;
[0044] Figure 5 This is a schematic diagram of a cooperating limiting member one and a limiting member two according to an exemplary embodiment 3;
[0045] Figure 6 This is a schematic diagram of a cooperating limiting member one and a limiting member two according to an exemplary embodiment 4;
[0046] Figure 7 Is with Figure 1 A tenon structure (integrated) in which the first limiting component and the second limiting component cooperate;
[0047] Figure 8 Is with Figure 1 A tenon structure (split type) in which the first limiting component and the second limiting component cooperate;
[0048] Figure 9 Is with Figure 3 A tenon structure (integrated) in which the first limiting component and the second limiting component cooperate;
[0049] Figure 10 Is with Figure 3 A tenon structure (split type) in which the first limiting component and the second limiting component cooperate;
[0050] Figure 11 Is with Figure 5 A tenon structure (integrated) in which the first limiting component and the second limiting component cooperate;
[0051] Figure 12 Is with Figure 5 A tenon structure (split type) in which the first limiting component and the second limiting component cooperate;
[0052] Figure 13 Is with Figure 6 A tenon structure (integrated) in which the first limiting component and the second limiting component cooperate;
[0053] Figure 14 Is with Figure 6 A tenon structure (split type) in which the first limiting component and the second limiting component cooperate;
[0054] Figure 15 This is a schematic diagram illustrating the integration of the structure used to strengthen the transverse connection between the slab and the beam using the construction method of Example 1.
[0055] Figure 16 This is a schematic diagram of a cooperating limiting member one and a limiting member two according to an exemplary embodiment 5;
[0056] Figure 17 This is a schematic diagram illustrating the integration of the structure used to strengthen the transverse connection between the slab and the beam using the construction method of Example 2.
[0057] Figure 18 This is a schematic diagram showing the distribution of structures used to strengthen the lateral connections between slab beams on the slab beams.
[0058] In the diagram: 1. Limiting component one; 2. Limiting component two; 3. Tenon structure; 4. Reinforcing bar reserved hole; 5. Slab beam; 6. Hinge joint; 7. Anchoring reinforcement; 8. Longitudinal reinforcement; 9. Structure used to strengthen the transverse connection of the slab beam. Detailed Implementation
[0059] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.
[0060] This invention provides a structure for strengthening the lateral connection of slab beams, including a limiting member 1, a limiting member 2, and a tenon structure 3. The limiting member 1 and the limiting member 2 are respectively disposed in two adjacent slab beams 5. When the limiting member 1 and the limiting member 2 are respectively disposed in adjacent slab beams 5, a limiting groove is formed between the limiting member 1 and the limiting member 2, and the limiting groove is the area between the two slab beams 5. A portion of the tenon structure 3 is inserted into the limiting groove.
[0061] See Figure 15 and Figure 17 The diagram illustrates the limiting component 1, limiting component 2, and tenon structure 3 installed on the slab beam 5. These structures, used to strengthen the lateral connection between the slab beams, can, to some extent, suppress the bending and tensile expansion of the lower surface of the hinge joint. Several structures for strengthening the lateral connection between adjacent slab beams 1 can be spaced apart along the length of the slab beam 5.
[0062] The present invention provides a simple and low-cost structure that improves the overall load-bearing capacity and ensures structural safety in multi-precast slab-beam structures with minimal impact on the original slab beams. It can be applied to both new construction and reinforcement projects. Furthermore, the present invention can be modified to meet different needs, and is not only suitable for slab-beam bridges but also for connecting other similar engineering components.
[0063] Regarding the statement that "limiting member 1 and limiting member 2 are respectively set within two adjacent slab beams 5", the specific arrangement can be as follows: See Figures 1-6 The limiting component 1 and the limiting component 2 are provided with steel bar reserved holes 4. The longitudinal steel bars 8 in the slab beam 5 pass through the steel bar reserved holes 4 and the limiting component 1 and the limiting component 2.
[0064] During the precast slab beam construction, in the reinforcement binding stage, the longitudinal reinforcement bars 8 are pre-passed through the pre-drilled holes in the limiting members 1 and 2 before reinforcement binding. The limiting members 1 and 2 are set at intervals. After the reinforcement is fixed, the positions of the limiting members 1 and 2 are adjusted so that their bottom surfaces are flush with the bottom surface of the precast slab beam 5 and then fixed. Then, the formwork is installed and concrete is poured to prepare the slab beam.
[0065] The longitudinal reinforcing bars 8 pass through the reserved reinforcing bar holes 4. The number of reserved reinforcing bar holes 4 is adjusted according to the configuration of the longitudinal reinforcing bars of the precast slab beam 5 and the dimensions of the limiting member 1 and the limiting member 2.
[0066] It should be noted that the matching limiting components 1 and 2 are respectively set on two adjacent slab beams 5. When precasting slab beams, limiting components 1 and 2 are set on the longitudinal reinforcement of the same slab beam (called the intermediate slab beam). These two limiting components cooperate with the limiting components on the left and right sides of the intermediate slab beam to form limiting grooves.
[0067] Regarding the statement that "limiting member 1 and limiting member 2 are respectively set within two adjacent slab beams 5", the specific arrangement can also be as follows: See Figures 16-17 Anchor steel bars 7 are provided on the limiting component 1 and the limiting component 2.
[0068] For cases where anchoring steel bars 7 are provided on limiting component 1 and limiting component 2, this method is applicable to prefabricated slab girder bridges where hinge joints need to be repaired.
[0069] The damaged hinge joint is ground down, and some of the original concrete on the adjacent beam 5 is removed to form the installation positions for limiting component 1 and limiting component 2. Anchor holes are drilled, and high-strength adhesives such as epoxy resin are injected into the anchor holes. Limiting component 1 and limiting component 2 are installed, and anchoring steel bars 7 are inserted into the anchor holes.
[0070] The limiting component 1 and the limiting component 2 have the same structure. Both limiting component 1 and the limiting component 2 are block structures. Both limiting component 1 and the limiting component 2 are polygonal structures with polygonal cross sections. When limiting component 1 and the limiting component 2 are respectively set in adjacent slab beams 5, a limiting groove is formed between limiting component 1 and the limiting component 2. The horizontal distance d between limiting component 1 and the limiting component 2 should not be less than 5cm to ensure the rigidity of the transverse strengthening device of the precast slab beam.
[0071] See Figure 1 , Figure 3 , Figure 5 as well as Figure 6 The diagram illustrates four types of matching limiting components 1 and 2. The surfaces of limiting components 1 and 2 (collectively referred to as limiting components) exposed outside the plate beam 5 match the shape of the corresponding side surface of the plate beam. Alternatively, the surfaces of the limiting components exposed outside the plate beam 5 can be on the same plane as the corresponding side surface of the plate beam, or the surfaces of the limiting components exposed outside the plate beam 5 can form a recess relative to the corresponding side surface of the plate beam. Figure 3 and Figure 5 The height of the middle limiting component is greater than Figure 1 and Figure 6 The height of the middle limiting component, Figure 6Compared to Figure 1 The tips of the limiting member 1 and the relative member 2 that are close to each other have a chamfered structure.
[0072] The tenon structure 3 can be either an integral or separate structure. See also... Figure 7 , Figure 9 , Figure 11 as well as Figure 13 This illustrates the interlocking tenon structure of the integrated design; see also Figure 8 , Figure 10 , Figure 12 as well as Figure 14 The diagram illustrates the snap-fit structure of the split-type structure. After installation, the split-type snap-fit should be rigidly connected to the outer part of the limiting groove to form a whole.
[0073] The tenon structure 3 includes a first tenon part and a second tenon part. The first tenon part is set in the limiting groove and the shape of the first tenon part matches the limiting groove. The second tenon part is located outside the limiting groove. The cross-sectional area between the first tenon part and the second tenon part is the smallest.
[0074] The side of limiting member 1 facing limiting member 2 and the side of limiting member 2 facing limiting member 1 respectively match the shape of the part of the tenon structure 3 located in the limiting groove. Figure 7 and Figure 8 The illustrated latch structure and Figure 1 The limiting component 1 and limiting component 2 shown in the diagram cooperate with each other. Figure 9 and Figure 10 The illustrated latch structure and Figure 3 The limiting component 1 and limiting component 2 shown in the diagram cooperate with each other. Figure 11 and Figure 12 The illustrated latch structure and Figure 5 The limiting component 1 and limiting component 2 shown in the diagram cooperate with each other. Figure 13 and Figure 14 The illustrated latch structure and Figure 6 The limiting component 1 and the limiting component 2 shown in the diagram cooperate with each other.
[0075] The dimensions of the tenon structure located within the limiting groove should be compatible with the dimensions within the limiting groove formed by the splicing of limiting member 1 and limiting member 2 of the adjacent beam 5.
[0076] Limiting components 1 and 2 do not affect the structural dimensions and construction requirements of the precast slab beam 5. Near the hinge joint 6, to meet the dimensional requirements of the integral tenon structure or the assembled tenon structure, the corresponding limiting groove formed by the splicing of limiting components 1 and 2 is usually larger than the original structural dimensions of the hinge joint 6 (i.e., the surface of the limiting component exposed outside the slab beam 5 forms a recess relative to the corresponding side of the slab beam). The transverse reinforcement device of the precast slab beam does not affect the connection reinforcement structure and installation of the adjacent precast slab beam 1.
[0077] The corners of limiting component 1, limiting component 2, and tenon structure 3 are blunted chamfers to avoid stress concentration, and the acute angles of limiting component 1, limiting component 2, and tenon structure 3 are not less than 45°.
[0078] Limiting component 1, limiting component 2, and tenon structure 3 are all made of Q345 steel. The exposed part of tenon structure 3 should be treated with rust prevention.
[0079] Limiting member 1 and limiting member 2 are arranged within the tension zone (below the transverse neutral axis) of the cross section of the slab beam, and their height is adapted to the height of the tension zone of the cross section of the slab beam.
[0080] When installing the tenon structure 3, rigid shims or localized epoxy resin injection can be used to improve fixation. Considering the error during the installation of precast slab beams, tenon structures of different sizes can be prefabricated for adjustment. During the installation of precast slab beams, rigid shims can also be added. If conditions permit, materials with better mechanical properties (compared to hinged concrete materials) (such as epoxy resin) can be injected into the gap between the limiting groove and the tenon structure to improve the working performance of the transverse strengthening device of the precast slab beam.
[0081] In addition, the part of the tenon structure 3 located outside the limiting groove can also serve as an anchor block or a turning block for external prestressing.
[0082] The structure 9 provided by this invention for strengthening the transverse connection of slab beams can be used during the prefabrication process of slab beams, as detailed below:
[0083] This invention provides a construction method, including a prefabrication stage and an installation stage for the precast slab beam 5:
[0084] During the prefabrication stage, the longitudinal steel bars 8 are passed through the steel bar reserved holes of limiting member 1 and limiting member 2, and limiting member 1 and limiting member 2 are set at intervals respectively;
[0085] During the installation phase, a limiting groove is formed between the limiting component 1 and the limiting component 2 on two adjacent beams 5, and a tenon structure 3 is installed in the limiting groove.
[0086] The prefabrication stage specifically includes the following steps:
[0087] Step 1, Pre-processing preparations for precast slab beams: such as designing the dimensions and reinforcement of the slab beams, and determining the form, number, and installation location of the transverse reinforcement devices for the precast slab beams;
[0088] Step 2, Reinforcement binding: Reinforcement is bound on the precast platform in the following order: bottom plate, web plate, and top plate. When binding the continuous reinforcement of the web plate, the longitudinal reinforcement 8 is passed through the reinforcement reserved holes of the limiting member 1 and limiting member 2 before binding. The limiting member 1 and limiting member 2 are set at intervals. After the reinforcement is fixed, the positions of the limiting member 1 and limiting member 2 are adjusted so that their bottom surfaces are flush with the bottom surface of the precast beam 5 and fixed.
[0089] Step 3, Template Installation: During the template installation process, solid blocks are inserted between limiting component 1 and the template and between limiting component 2 and the template to isolate the concrete (so that the surface of the limiting component exposed outside the slab beam 5 forms a depression relative to the corresponding side of the slab beam).
[0090] Step 4, pouring and curing: Pour concrete for beam 5 inside the formwork. After the concrete is poured, proceed with curing, formwork removal, prestressing tendon tensioning and installation, and then move the beam.
[0091] Step 5: Clean the grooves corresponding to limiting component 1 and limiting component 2, and remove concrete slag and other debris.
[0092] The installation phase includes the following steps:
[0093] Step 1: Installation and positioning of precast slab beam 5: Control the installation position of precast slab beam 5, and the limiting component 1 and limiting component 2 of adjacent precast slab beam 5 form corresponding limiting grooves;
[0094] Step 2: Inspect and clean the limiting groove: Measure and inspect the installation dimensions of the limiting groove, and clean the surface of the limiting groove;
[0095] Step 3: Install and adjust the locking mechanism 3;
[0096] Step 4: Treatment of hinge joints in precast slab beams: treatment of hinge joint surfaces, reinforcement binding, installation of bottom formwork, and pouring of beams. Grout;
[0097] Step 5: Precast slab hinge joint concrete pouring: pour hinge joint concrete, cure concrete, and form the transverse reinforcement device of precast slab beam 5.
[0098] Step three of the installation phase can be divided into the following two steps:
[0099] Step 3 (1) Install the tenon: Install the integral tenon structure or the assembled (split) tenon structure;
[0100] Step 3 (2) Adjusting the locking tenon: Adjust the compatibility between the locking tenon structure and the limiting groove. You can further fix it by adding rigid shims or locally injecting epoxy resin.
[0101] The structure 9 provided by this invention for strengthening the transverse connection of slab beams can be used in the repair process of slab beams, as detailed below:
[0102] A construction method, comprising the following:
[0103] Hinge joint processing and cleaning: Grind the damaged hinge joint and remove some of the original concrete on the plate beam 5 (two adjacent plate beams) to form the installation position of limiting component 1 and limiting component 2.
[0104] Install limiting component 1 and limiting component 2;
[0105] 3. Install and adjust the locking mechanism.
[0106] The above construction methods specifically include the following:
[0107] Step 1, Preparations before reinforcement: Determine the type, number, and installation location of the transverse reinforcement devices for the precast slab beam 5;
[0108] Step 2, hinge joint processing and cleaning: Grind the damaged hinge joint, remove some of the original concrete on the adjacent beam 5 to form the installation position of the limiting component 1 and the limiting component 2, and drill anchor holes. After completion, remove the remaining debris.
[0109] Step 3, install limiting component 1 and limiting component 2: Clean the inner wall of the anchor hole, inject high-strength adhesive such as epoxy resin into the anchor hole, embed the anchoring steel bar 7 for installing limiting component 1 and limiting component 2 into the anchor hole, and install limiting component 1 and limiting component 2 to form a limiting groove.
[0110] Step 4, Install and adjust the locking clip: Place the locking clip in the limiting groove and adjust it;
[0111] Step 5: Grouting the hinge joint;
[0112] Step 6: Remove the temporary sealant from the hinge joint; reinforcement is now complete.
[0113] Regarding the "grouting of the hinge joint" in step five above, it specifically includes the following:
[0114] Preparation for grouting at hinge joints: Install grouting pipes and measuring pipes, and seal the hinge joints to form a closed cavity;
[0115] Grouting of hinge joints: Grouting of hinge joints is carried out in two stages, with the second stage serving as a supplementary grouting and should be performed 12 hours after the first grouting.
[0116] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.
[0117] In the description of this invention, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0118] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0119] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "a particular example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0120] 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 structure for strengthening transverse connections between slab beams, characterized in that, It includes limiting component one, limiting component two, and a locking structure, among which, The first limiting component and the second limiting component are respectively installed in two adjacent plate beams; When the first limiting member and the second limiting member are respectively installed in adjacent plate beams, a limiting groove is formed between the first limiting member and the second limiting member, and the limiting groove is the area between the two plate beams; Part of the latch structure is inserted into the limiting groove; The latch structure includes a first latch portion and a second latch portion. The first latch portion is disposed within the limiting groove and its shape matches the limiting groove. The second latch portion is located outside the limiting groove, and the cross-sectional area between the first latch portion and the second latch portion is minimized.
2. The structure for strengthening the transverse connection of plate beams according to claim 1, characterized in that, The longitudinal reinforcing bars in the slab beam pass through the first limiting member and the second limiting member; or, the first limiting member and the second limiting member are provided with anchoring reinforcing bars.
3. The structure for strengthening transverse connections between slab beams according to claim 1, characterized in that, The limiting component one and the limiting component two have the same structure, and both the limiting component one and the limiting component two are block structures; the tenon structure is an integral structure or a split structure, and the corners of the limiting component one, the limiting component two and the tenon structure are blunt chamfered.
4. The structure for strengthening the transverse connection of plate beams according to claim 1, characterized in that, The locking structure is improved by adding rigid gaskets or locally injecting epoxy resin to enhance fixation; The portion of the tenon structure located outside the limiting groove can also serve as an anchor block or a steering block for external prestressing.
5. A construction method, characterized in that, The construction method employs the structure for strengthening the transverse connection of the slab beams as described in any one of claims 1-4, and the construction method includes a prefabrication stage and an installation stage for the prefabricated slab beams: During the prefabrication stage, longitudinal steel bars are passed through the steel bar pre-reserved holes of limiting member one and limiting member two, and limiting member one and limiting member two are set at intervals respectively; During the installation phase, a tenon structure is installed in the limiting groove formed by the upper limit component one and the limiting component two of the adjacent plate beams.
6. The construction method according to claim 5, characterized in that, The prefabrication stage specifically includes the following steps: Step 1: Preparations before precast beam processing; Step 2, Rebar Binding: When binding the longitudinal reinforcement of the web, the longitudinal reinforcement is passed through the reserved holes of the first and second limiting members in advance, and then the reinforcement is bound. The first and second limiting members are set at intervals. After the reinforcement is fixed, the positions of the first and second limiting members are adjusted so that their bottom surfaces are flush with the bottom surface of the precast beam and fixed. Step 3, Template Installation: During template installation, solid blocks are inserted between limiting component one and the template, and between limiting component two and the template, to isolate the concrete. Step 4, Pouring and Curing: Pouring concrete into the slab beam inside the formwork. After the concrete is poured, curing, demolding, tensioning and installing the prestressing tendons are carried out in sequence, followed by beam relocation. Step 5: Clean the grooves corresponding to limiting component 1 and limiting component 2.
7. The construction method according to claim 6, characterized in that, The installation phase includes the following steps: Step 1: Precast slab beam installation and positioning: Control the installation position of the precast slab beams, and the limiting components one and two of the adjacent precast slab beams form corresponding limiting grooves; Step 2: Inspect and clean the limiting groove: Measure and inspect the installation dimensions of the limiting groove, and clean the surface of the limiting groove; Step 3: Install and adjust the locking mechanism; Step 4: Treatment of hinge joints in precast slab beams: treatment of hinge joint surfaces, installation of bottom formwork after rebar tying, and pouring of mortar for beam joints; Step 5: Concrete pouring for the hinge joint of the precast slab: Pour the hinge joint concrete, cure the concrete, and form the transverse reinforcement device of the precast slab beam.
8. A construction method, characterized in that, The construction method employs the structure for strengthening the transverse connection of slab beams as described in any one of claims 1-7, and is used for slab beam reinforcement projects, comprising the following: Hinge joint processing and cleaning: The damaged hinge joint is ground down and some of the original concrete on the beam is removed to form the installation positions of limiting component one and limiting component two. Install limiting component one and limiting component two; Install and adjust the locking mechanism.
9. The construction method according to claim 8, characterized in that, Specifically, it includes the following: Step 1, Preparations before reinforcement: Determine the type, number, and installation location of the transverse reinforcement devices for the precast slab beams; Step 2, hinge joint processing and cleaning: Grind the damaged hinge joint, remove some of the original concrete on the adjacent beams to form the installation positions of limiting component one and limiting component two, and drill anchor holes. After completion, remove the remaining debris. Step 3, install limiting component 1 and limiting component 2: Clean the inner wall of the anchor hole, inject high-strength adhesive such as epoxy resin into the anchor hole, embed the anchoring steel bars for installing limiting component 1 and limiting component 2 into the anchor hole, and install limiting component 1 and limiting component 2 to form a limiting groove. Step 4, Install and adjust the locking clip: Place the locking clip in the limiting groove and adjust it; Step 5: Grouting the hinge joint; Step 6: Remove the temporary sealant from the hinge joint; reinforcement is now complete.