Fabricated prefabricated component connecting structure and construction method thereof

Abstract

The application relates to the field of building structural members, in particular to a fabricated prefabricated member connecting structure and a construction method thereof, which comprises a sleeve, the sleeve is screw-connected to a reinforcing bar, further comprises a connecting rod, a limiting disc, a pouring sleeve and a supporting elastic piece; the connecting rod is screw-connected to the sleeve, the limiting disc is fixed to the connecting rod, the limiting disc is arranged in the pouring sleeve, and the supporting elastic piece is arranged in the pouring sleeve and used for supporting the limiting discs arranged on the two sides of the pouring sleeve. The pouring sleeve can be stably arranged at a preset position through the pre-supporting of the supporting elastic piece on the two connecting rods, and then pouring can be directly carried out, so that the operation process is simplified and the operation efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of building structural components, and more particularly to a prefabricated component connection structure and its construction method. Background Technology

[0002] Precast component connection structures refer to the nodes and joints used to connect various precast components (such as wall panels, floor slabs, beams, and columns) in precast buildings. This connection method not only needs to ensure the overall stability, strength, and durability of the building, but also needs to meet various performance requirements such as waterproofing, sound insulation, and fire resistance. Common connection technologies include mechanical connections (such as bolts and welding), cast-in-place concrete connections, and prestressed connections.

[0003] The existing connection method mainly involves connecting the sleeve and the steel bar, then installing the connecting rod onto the sleeve, and placing the two connecting rods in a cavity to pour solidifying material for connection. This method requires pre-fixing the cavity before pouring, which increases the number of steps and reduces work efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a prefabricated component connection structure and its construction method, which aims to stabilize the grouting sleeve in a preset position by pre-supporting the two connecting rods with a supporting elastic element, and then directly grouting, thereby simplifying the operation process and improving the operation efficiency.

[0005] To achieve the above objectives, in a first aspect, the present invention provides a prefabricated component connection structure, including a sleeve threadedly connected to a reinforcing bar, and further including a connecting rod, a limiting plate, a grouting sleeve, and a supporting elastic element; the connecting rod is threadedly connected to the sleeve, the limiting plate is fixed to the connecting rod, the limiting plate is disposed within the grouting sleeve, and the supporting elastic element is disposed within the grouting sleeve for supporting the limiting plates installed on both sides of the grouting sleeve.

[0006] The limiting plate includes a limiting plate body, a second elastic element, and a connecting block. The connecting block has a triangular contact surface and is slidably disposed on the limiting plate body. The second elastic element is disposed between the limiting plate body and the connecting block.

[0007] The filling sleeve includes a filling sleeve body, an overflow pipe, and a one-way valve. The filling sleeve body has a filling port and an exhaust port, which are located at the top of the filling sleeve body. The overflow pipe is located on one side of the filling sleeve body. The one-way valve is connected to the overflow pipe and is located inside the filling sleeve body.

[0008] The supporting elastic element includes a support rod, a spring, and two contact plates. The support rod is fixed to the middle of the injection sleeve body, the spring is fixed to the support rod, and the contact plates are fixed to both ends of the spring.

[0009] The prefabricated component connection structure also includes a sealing structure, which is used to seal the gap between the connecting rod and the injection sleeve.

[0010] The sealing structure includes a pressure block, a sealing layer, a third elastic element, and a locking rod. The pressure block is slidably disposed on the connecting rod, the locking rod is rotatably disposed on one side of the pressure block and detachably connected to the sleeve, the third elastic element is disposed between the pressure block and the sleeve, and the sealing layer is fixed to one side of the pressure block.

[0011] The sealing structure further includes a water-swellable sealing strip, which is fixed between the sealing layer and the injection sleeve body.

[0012] The locking rod includes a rotating rod body, an elastic layer, and a locking block. The rotating rod body is rotatably mounted on the pressure block, the elastic layer is mounted on the rotating rod body, the locking block is slidably mounted on the pressure block, and a locking groove is provided on the connecting rod corresponding to the locking block.

[0013] Secondly, the present invention also provides a construction method for a prefabricated component connection structure, comprising:

[0014] Connect the two sleeves to the two steel bars to be installed, and install the two connecting rods onto the two sleeves respectively;

[0015] Place the injection sleeve on one of the limiting plates and press down on the injection sleeve to compress the support elastic element, so that the injection sleeve can move into the other limiting plate. Release the injection sleeve so that the two limiting plates remain stable under the support of the support elastic element.

[0016] Seal the connection between the injection sleeve and the connecting rod;

[0017] Pour solidification material into the injection sleeve through the opening on the injection sleeve and wait for solidification to complete.

[0018] The solidified material contains a luminescent material, which is used for ultraviolet light to detect the degree of filling after solidification.

[0019] The present invention discloses a prefabricated component connection structure and its construction method. One end of the sleeve is provided with an internal thread, which is used to connect with the reinforcing steel embedded in the prefabricated component to achieve preliminary anchoring and fixing. Both ends of the connecting rod are provided with external threads, one end of which is threadedly connected to the other end of the sleeve to form a stable mechanical connection structure.

[0020] Two limiting discs are fixedly installed on the connecting rod, located on opposite sides inside the grouting sleeve. The grouting sleeve is a hollow cylindrical structure; its internal space accommodates the limiting discs and supports the elastic components. After installation, the overall force-bearing and force-transfer functions of the connection structure are achieved by injecting high-strength, non-shrink grout or concrete. Sealing structures are provided at both ends of the grouting sleeve to prevent grout leakage during grouting and to ensure the tightness and durability of the connection.

[0021] A supporting elastic element, made of a spring or other elastic material with compressive properties, is provided between the two limiting discs. Its function is to apply a certain preload to the limiting discs before grouting, making the threaded connection between the connecting rod and the sleeve tighter and enhancing the overall connection stability. Simultaneously, during subsequent grouting, the supporting elastic element can absorb some construction errors and temperature deformation stress, preventing structural damage caused by changes in external loads, thereby improving the seismic performance and durability of the connection node.

[0022] This allows the injection sleeve to be stabilized in a preset position by pre-supporting the two connecting rods with the support elastic element, and then injection can be performed directly, simplifying the operation process and improving operation efficiency. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a structural diagram of a prefabricated component connection structure according to the present invention.

[0025] Figure 2 This is a right-side structural diagram of a prefabricated component connection structure according to the present invention.

[0026] Figure 3 This is a left-side structural diagram of a prefabricated component connection structure according to the present invention.

[0027] Figure 4This is a cross-sectional view of a prefabricated component connection structure according to the present invention.

[0028] Figure 5 yes Figure 4 A magnified view of detail A.

[0029] Figure 6 yes Figure 4 A magnified view of detail B.

[0030] Sleeve 101, connecting rod 102, limiting plate 103, filling sleeve 104, supporting elastic element 105, limiting plate body 106, second elastic element 107, connecting block 108, filling sleeve body 109, overflow pipe 110, one-way valve 111, support rod 112, spring 113, contact plate 114, pressure block 115, sealing layer 116, third elastic element 117, locking rod 118, water-swellable sealing strip 119, rotating rod body 120, elastic layer 121, locking block 122. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of this invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships 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, in the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0033] First Embodiment

[0034] Please see Figures 1-6 This invention provides a prefabricated component connection structure, including a sleeve 101 threadedly connected to a reinforcing bar, and further including a connecting rod 102, a limiting disc 103, a grouting sleeve 104, and a supporting elastic element 105; the connecting rod 102 is threadedly connected to the sleeve 101, the limiting disc 103 is fixed to the connecting rod 102, the limiting disc 103 is disposed inside the grouting sleeve 104, and the supporting elastic element 105 is disposed inside the grouting sleeve 104 to support the limiting discs 103 installed on both sides of the grouting sleeve 104.

[0035] In this embodiment, one end of the sleeve 101 is provided with an internal thread, which is used to connect with the steel bar embedded in the precast component to achieve preliminary anchoring and fixing; both ends of the connecting rod 102 are provided with external threads, one end of which is threadedly connected to the other end of the sleeve 101 to form a stable mechanical connection structure.

[0036] Two limiting discs 103 are fixedly installed on the connecting rod 102, located on opposite sides inside the grouting sleeve 104. The grouting sleeve 104 is a hollow cylindrical structure, its internal space accommodating the limiting discs 103 and supporting the elastic element 105. After installation, the overall force-bearing and force-transmitting function of the connection structure is achieved by grouting high-strength non-shrink grout or concrete. Sealing structures are provided at both ends of the grouting sleeve 104 to prevent grout leakage during grouting and to ensure the tightness and durability of the connection.

[0037] A supporting elastic element 105 is provided between the two limiting discs 103. This supporting elastic element 105 is made of a spring 113 or other elastic material with compressive properties. Its function is to apply a certain preload to the limiting discs 103 before grouting, making the threaded connection between the connecting rod 102 and the sleeve 101 tighter and enhancing the overall connection stability. Simultaneously, during subsequent grouting, the supporting elastic element 105 can also absorb some construction errors and temperature deformation stress, avoiding structural damage caused by changes in external loads, thereby improving the seismic performance and durability of the connection node.

[0038] Thus, the injection sleeve 104 can be stabilized in a preset position by the pre-support of the two connecting rods 102 by the support elastic element 105, and then injection can be carried out directly, which simplifies the operation process and improves the operation efficiency.

[0039] The grouting material used in this invention is a high-strength, non-shrink cement-based grouting material, conforming to Class IV requirements in the national standard GB / T50448-2015 "Technical Specification for Application of Cement-Based Grouting Materials". Its key performance indicators include: 1-day compressive strength not less than 35 MPa, 3-day compressive strength not less than 60 MPa, and 28-day compressive strength not less than 85 MPa; vertical expansion rate of 0.02% to 0.10%; initial flowability not less than 300 mm, and 30-minute flowability retention rate not less than 90%; chloride ion content not exceeding 0.05%; and bleeding rate of 0%. This grouting material exhibits excellent flowability, micro-expansion, and long-term durability, making it suitable for high-precision prefabricated joint connections.

[0040] The luminescent material incorporated into the grout is rare-earth-doped strontium aluminate phosphor (chemical formula SrAl2O4:Eu). 2 ,Dy3 The material has a particle size range of 10 to 30 micrometers. When excited by 365nm ultraviolet light (UV-A band), it emits green visible light with a wavelength of 520nm. The luminescent material is uniformly incorporated at 1.0% of the total mass of the grout dry powder. Laboratory verification shows that at this dosage, the 28-day compressive strength of the grout decreases by no more than 3%, and the flowability loss is no more than 5%, with negligible impact on structural performance. Twenty-four hours after grouting, the connection area can be irradiated with a 365nm ultraviolet light source, and fluorescence images can be collected using an industrial camera with a 520nm bandpass filter. If the grouting is full, the entire grout sleeve will exhibit uniform and continuous fluorescence; if there are voids or incomplete grouting areas, there will be no fluorescence signal at the corresponding location, thus achieving non-destructive and visual detection of the filling degree.

[0041] The supporting elastic element 105 consists of a central support rod 112, a compression spring 113, and two contact plates 114. The compression spring 113 is made of 60Si2MnA spring steel, with a free height of 50mm, a working compression stroke of 10mm, and a stiffness coefficient of 20N / mm. It is pre-compressed by 5mm during installation, providing an initial preload of 100N; the maximum working load is 300N, corresponding to a total compression of 15mm; and its fatigue life is not less than 10 years. 5 The contact plate 114 is made of Q235 steel with a knurled surface and a friction coefficient of not less than 0.4, ensuring effective force transmission with the end face of the limit plate.

[0042] The limiting plate 103 includes a limiting plate body 106, a second elastic element 107, and a connecting block 108. The connecting block 108 has a triangular contact surface and is slidably disposed on the limiting plate body 106. The second elastic element 107 is disposed between the limiting plate body 106 and the connecting block 108.

[0043] The outer end face of the connecting block 108 is provided with a triangular contact surface, which is used to form a wedge-shaped fit with the inner wall of the injection sleeve 104. When the connecting structure is subjected to external loads, it can enhance the friction and anti-slip capability between the limiting plate 103 and the injection sleeve 104. The connecting block 108 is set on the limiting plate body 106 by a sliding fit, and it can move radially in the sliding groove or guide rail structure of the limiting plate body 106, thereby realizing adaptive adjustment to external forces.

[0044] The second elastic element 107 is disposed between the limiting disc body 106 and the connecting block 108. It is usually made of a compression spring 113, a rubber pad, or other materials with resilience. Its main function is to provide a restoring force for the connecting block 108, so that the triangular contact surface maintains a certain initial contact pressure when not subjected to external force. When the limiting disc 103 is inserted into the filling sleeve 104 along with the connecting rod 102, if there is unevenness or dimensional deviation in the inner wall of the filling sleeve 104, the connecting block 108 will undergo radial displacement under the action of contact force, compressing the second elastic element 107. Once it passes the highest point, the elastic element pushes the connecting block 108 to automatically reset, thereby realizing the flexible engagement between the limiting disc 103 and the filling sleeve 104, enhancing the stability and sealing of the connection node.

[0045] The second elastic element 107 is disposed between the limiting plate body 106 and the connecting block 108. It is a small compression spring made of stainless steel 304 with a stiffness coefficient of 15N / mm and a pre-compression amount of 2mm, providing a 30N restoring force. It allows the connecting block 108 to slide radially within the range of 0 to 4mm to accommodate the manufacturing tolerance of ±1mm of the inner diameter of the injection sleeve.

[0046] The connecting block 108 in the limiting plate 103 has a triangular contact surface with a wedge angle of 15° and a contact surface length of 12mm. Four connecting blocks are evenly distributed circumferentially on each limiting plate, sliding only radially along the T-shaped guide rail on the limiting plate body. Under a 10kN axial load, this wedge structure can generate a radial component force of approximately 2.7kN. Combined with the contact surface friction coefficient, this increases the anti-slip bearing capacity by approximately 40%, significantly enhancing the stability of the connection node under stress.

[0047] The filling sleeve 104 includes a filling sleeve body 109, an overflow pipe 110, and a one-way valve 111. The filling sleeve body 109 has a filling port and an exhaust port. The filling port and the exhaust port are located at the top of the filling sleeve body 109. The overflow pipe 110 is located on one side of the filling sleeve body 109. The one-way valve 111 is connected to the overflow pipe 110 and is located inside the filling sleeve body 109.

[0048] The grouting sleeve body 109 is a hollow cylindrical structure used to accommodate the limiting disc 103, the supporting elastic element 105, and the high-strength, non-shrink grout or concrete material to be poured subsequently. It is a key component for achieving force transmission and connection between precast components. A grouting port and a vent are provided at the top of the grouting sleeve body 109. The grouting port is used to inject the grouting material, while the vent is used to expel internal air during the grouting process, preventing air bubbles from affecting the grout density and thus ensuring the quality and strength of the connection joint.

[0049] An overflow pipe 110 is provided on one side of the grouting sleeve body 109. The overflow pipe 110 is connected to the inside of the grouting sleeve 104. Its main function is to automatically discharge excess grout when the grout is filled to a set height during the grouting process. At the same time, it can also discharge residual air bubbles at the bottom through the overflow pipe 110 to avoid pressure buildup or material waste due to excessive grouting. In addition, by observing whether grout flows out of the overflow pipe 110, it can be determined whether the grouting is completed and reaches a full state, thus improving the controllability of construction quality.

[0050] The one-way valve 111 is connected to the overflow pipe 110 and is located inside the grouting sleeve body 109. The one-way valve 111 has the function of allowing only the grouting material to flow outward from the inside of the grouting sleeve 104, preventing the grout from flowing back or shrinking after grouting is completed, thereby ensuring that the grout inside the grouting sleeve 104 is full and dense, and improving the integrity and durability of the connection node.

[0051] The supporting elastic element 105 includes a support rod 112, a spring 113 and two contact plates 114. The support rod 112 is fixed in the middle of the injection sleeve body, the spring 113 is fixed on the support rod 112, and the contact plates 114 are fixed at both ends of the spring 113.

[0052] The support rod 112 is fixedly installed in the middle of the injection sleeve body 109, and is usually firmly connected to the inner wall of the injection sleeve 104 by welding or bolting to ensure that it will not shift or loosen during construction and structural stress. As the core load-bearing component of the entire supporting elastic element 105, the support rod 112 plays the role of positioning and supporting the spring 113 and the contact plate 114.

[0053] A spring 113 is fitted onto the support rod 112. This spring 113 is preferably a highly elastic, fatigue-resistant compression spring. Different stiffness coefficients of the spring 113 material can be selected according to actual engineering needs to adapt to different stress conditions and deformation requirements. The main function of the spring 113 is to provide buffering and rebound capabilities during the connection of assembled components, absorbing minor displacements caused by installation errors, temperature changes, or external loads, thereby enhancing the adaptability and stability of the connection node.

[0054] Contact plates 114 are fixed at both ends of the spring 113. The contact plates 114 are generally made of high-strength metal sheet, and the surface may be provided with anti-slip texture or rubber pad layer to enhance the contact friction and force transmission efficiency with the limiting plate 103. The two contact plates 114 face the limiting plates 103 installed on both sides inside the filling sleeve 104 and are tightly fitted with their end faces. Under the pre-compression state of the spring 113, they apply uniform pressure to the limiting plate 103, forming a bidirectional support effect.

[0055] The prefabricated component connection structure also includes a sealing structure, which is used to seal the gap between the connecting rod 102 and the injection sleeve 104.

[0056] The sealing structure includes a pressure block 115, a sealing layer 116, a third elastic element 117, and a locking rod 118. The pressure block 115 is slidably disposed on the connecting rod 102. The locking rod 118 is rotatably disposed on one side of the pressure block 115 and is detachably connected to the sleeve 101. The third elastic element 117 is disposed between the pressure block 115 and the sleeve 101. The sealing layer 116 is fixed to one side of the pressure block 115.

[0057] The sealing structure also includes a water-swellable sealing strip 119, which is fixed between the sealing layer 116 and the injection sleeve body 109.

[0058] The pressure block 115 has a ring-shaped or split structure, is slidably mounted on the connecting rod 102, and can move along the axial direction of the connecting rod 102 for easy installation and adjustment. The pressure block 115 is typically made of high-strength metal material with a corrosion-resistant surface treatment to enhance its durability and environmental adaptability. A locking rod 118 is provided at one end of the pressure block 115. The locking rod 118 is rotatably mounted on the pressure block 115 by a hinge and can be detachably connected to a locking structure (such as a threaded hole or slot) on the sleeve 101. By rotating the locking rod 118 and fixing it to the sleeve 101, the position of the pressure block 115 can be locked, thereby ensuring the stability of the sealing structure during construction.

[0059] The third elastic element 117 is disposed between the pressure block 115 and the sleeve 101, and is usually a compression spring 113 or other elastic polymer material. Its function is to provide a certain pre-tightening force to the pressure block 115 so that it always applies pressure in the direction of the injection sleeve 104, thereby ensuring a tight fit between the sealing layer 116 and the injection sleeve 104 and improving the sealing effect.

[0060] The sealing layer 116 is fixed to the side of the pressure block 115 near the injection sleeve 104. It is preferably made of rubber, silicone, or other sealing materials with good elasticity and wear resistance. Its shape can be designed according to the gap between the connecting rod 102 and the injection sleeve 104, such as annular, conical, or multi-lip structure, to enhance sealing performance. The sealing layer 116 not only provides physical insulation but also undergoes elastic deformation under pressure, further filling any possible tiny gaps and achieving a tighter seal.

[0061] In the sealing structure, the pressure block 115 is a split two-half-ring structure with an inner diameter 0.2mm larger than the outer diameter of the connecting rod 102 for easy sliding installation. It is made of ZL102 cast aluminum with an anodized surface. The connecting rod 102 has four evenly distributed slots on its outer circumference, each 6mm wide and 3mm deep, with a chamfer R1. The locking block 122 at the end of the locking rod 118 is made of PA66 with 30% glass fiber, measuring 5.8mm wide and 2.8mm high. It fits the slot with an H8 / f7 tolerance to ensure reliable insertion and manual unlocking. The third elastic element 117 is a compression spring with a stiffness coefficient of 10N / mm and a preload of 3mm, providing a continuous sealing force of approximately 30N. The sealing layer 116 is made of fluororubber (FKM) material with a Shore hardness of 70A and a double-lip structure, capable of generating a sealing pressure of not less than 0.5MPa at 30% compression. The water-swellable sealing strip 119 uses BW-96 type water-swellable rubber with a free state cross-sectional size of 5mm×5mm. Its 7-day static water expansion rate is not less than 220%. It is pre-compressed by 20% during installation to form a double waterproof barrier.

[0062] In addition, the sealing structure also includes a water-swellable sealing strip 119, which is fixedly installed between the sealing layer 116 and the injection sleeve body 109, and is usually made of water-swellable rubber or polymer composite material. When moisture seeps into the connection, the water-swellable sealing strip 119 absorbs water and expands, automatically filling the gaps caused by temperature changes or structural deformation, forming a secondary waterproof barrier, thereby significantly improving the sealing ability of the entire connection node.

[0063] The locking rod 118 includes a rotating rod body 120, an elastic layer 121, and a locking block 122. The rotating rod body 120 is rotatably mounted on the pressure block 115. The elastic layer 121 is mounted on the rotating rod body 120. The locking block 122 is slidably mounted on the pressure block 115. A slot is provided on the connecting rod 102 corresponding to the locking block 122.

[0064] An elastic layer 121 is provided on the outer surface of the rotating rod body 120. This elastic layer 121 can be made of rubber, silicone, or other polymer materials with high elasticity and wear resistance. It is used to increase the friction between the locking rod 118 and the sleeve 101, and at the same time, it plays a buffering role during the locking process to prevent damage or slippage of components due to rigid contact. In addition, the elastic layer 121 can also adapt to connecting components of different sizes and specifications to a certain extent, improving the versatility and adaptability of the locking rod 118.

[0065] A locking block 122 is fixedly provided at the outer end of the elastic layer 121. The locking block 122 is a plastic or metal part with a certain degree of hardness to facilitate a stable fit with the slot on the connecting rod 102. When the locking rod 118 is rotated to the locked position, the locking block 122 is embedded into the corresponding slot on the connecting rod 102, forming a mechanical engagement, thereby firmly positioning the pressure block 115 on the connecting rod 102, ensuring that the sealing structure will not shift or loosen during the grouting process.

[0066] Furthermore, multiple slots are distributed circumferentially along the connecting rod 102 to accommodate locking requirements at different angles and improve installation flexibility. After the locking rod 118 is locked, the third elastic element 117 is compressed, generating a rebound force that acts on the pressure block 115, making the locking block 122 more tightly embedded in the slot, enhancing the stability and reliability of the overall connection.

[0067] In summary, the locking rod 118 structure, through the coordinated design of the rotating rod body 120, the elastic layer 121, and the locking block 122, achieves an effective locking function for the pressure block 115. This not only improves the stability of the sealing structure during construction but also enhances the assembly efficiency and safety of the connection nodes. It is suitable for various prefabricated component connection systems with high requirements for sealing and waterproofing, and has good engineering application prospects.

[0068] Second Embodiment

[0069] This invention also provides a construction method for a prefabricated component connection structure, comprising:

[0070] S201 connects the two sleeves 101 to the two steel bars to be installed respectively, and installs the two connecting rods 102 onto the two sleeves 101 respectively;

[0071] First, the two sleeves 101 are threadedly connected to the embedded reinforcing bars in the two precast components to be connected. One end of the sleeve 101 has an internal thread, which is fixed by rotating to engage with the external thread on the reinforcing bar, ensuring a firm connection and reliable force transmission. Then, the two connecting rods 102 are threadedly connected to their respective sleeves 101. Both ends of the connecting rods 102 have external threads; one end connects to the sleeve 101, and the other end connects to the limiting plate 103. After this step, two buttressable connection systems are formed, consisting of reinforcing bars, sleeves 101, and connecting rods 102.

[0072] S202 places the injection sleeve 104 on a limiting plate 103 and presses down the injection sleeve 104 to compress the support elastic element 105, so that the injection sleeve 104 leaves space to enter the other limiting plate 103. The injection sleeve 104 is then released, so that the two limiting plates 103 remain stable under the support of the support elastic element 105.

[0073] The injection sleeve 104 is fitted onto a limiting disc 103, and the injection sleeve 104 is pressed downwards along the axial direction of the connecting rod 102, compressing the supporting elastic element 105 inside the injection sleeve 104, thereby creating space between the two limiting discs 103. The injection sleeve 104 is then pushed further, allowing it to smoothly slide past the first limiting disc 103 and into the position of the second limiting disc 103. Once the injection sleeve 104 has passed the second limiting disc 103, the applied pressure is released, the supporting elastic element 105 returns to its original shape, and pushes the injection sleeve 104 back to its original position, so that the two limiting discs 103 are located on either side of the injection sleeve 104, maintaining a stable clamping state under the action of the supporting elastic element 105. This process not only achieves rapid centering and positioning but also improves the safety and adaptability of the assembly process through elastic buffering.

[0074] The "pressing down" operation requires the use of a specialized pressing tool or a manual hydraulic push rod. The applied force should be controlled within 400N, corresponding to a compression stroke of 10±1mm for the supporting elastic element 105. This stroke is sufficient to allow the injection sleeve 104 to smoothly pass over the first limiting plate and fit into the position of the second limiting plate. After release, the supporting elastic element should automatically reset within 2 seconds, so that the two limiting plates are symmetrically clamped on both sides inside the injection sleeve, with the deviation between the axis of the connecting rod and the axis of the injection sleeve not exceeding 0.5mm.

[0075] The grouting operation shall be performed as follows: First, confirm that the sealing structure is locked; open the top vent and temporarily seal the overflow pipe outlet; continuously inject grout from the grouting port at a flow rate of approximately 2L / min; when the vent outlet continuously and stably flows out of the grout without air bubbles for 10 seconds, close the vent outlet; then open the overflow pipe outlet and continue grouting until the overflow pipe stably discharges grout for more than 5 seconds; at this time, the one-way valve 111 automatically closes under the action of internal pressure (opening pressure 0.05MPa) to prevent grout backflow. The criteria for judging the completion of grouting are: grout discharge from the overflow pipe, tight vent outlet, and no sinking of the grout surface at the grouting port. After grouting, it is necessary to let it stand for curing in an environment with a temperature not lower than 10℃ and humidity not lower than 90% for no less than 24 hours.

[0076] Ultraviolet (UV) testing was performed 24 hours after infusion. The infusion area was irradiated with a 365nm LED UV lamp with a power of at least 3W, and images were captured in darkness using an industrial camera with a 520nm filter. If the fluorescence was uniform and continuous, the infusion was considered complete; if there was no fluorescence in certain areas, voids were identified, requiring re-infusion or rework.

[0077] S203 seals the connection between the injection sleeve 104 and the connecting rod 102;

[0078] To prevent grout leakage during subsequent grouting, a sealing structure is installed at the gap between the grouting sleeve 104 and the connecting rod 102. This sealing structure includes components such as a pressure block 115, a sealing layer 116, a third elastic element 117, a locking rod 118, and a water-swellable sealing strip 119. By rotating the locking rod 118, it engages with a groove on the connecting rod 102, causing the pressure block 115 to press the sealing layer 116 tightly. Simultaneously, the third elastic element 117 provides continuous pressure, ensuring a tight seal between the sealing layer 116 and the grouting sleeve 104 and the connecting rod 102. Furthermore, the water-swellable sealing strip 119 automatically expands in humid environments, further enhancing waterproofing performance.

[0079] S204 pours solidification material into the injection sleeve 104 through the opening on the injection sleeve 104 and waits for solidification to complete.

[0080] The solidified material contains a luminescent material, which is used for filling degree detection using ultraviolet light after solidification.

[0081] After sealing, a solidifying material, such as high-strength non-shrink grout or micro-expansion concrete, is injected through the injection port located at the top of the injection sleeve 104. During the injection process, it can be observed through the overflow pipe 110 whether the grout has filled the entire internal space of the injection sleeve 104, and air is discharged through the vent to ensure a tight injection. After injection, wait for the solidifying material to fully harden and form a stable connection joint.

[0082] The solidified material is pre-incorporated with luminescent materials, such as phosphors or UV-responsive additives. These materials show no significant changes under ordinary light, but emit visible light of specific wavelengths under ultraviolet irradiation. After solidification, the injection area is irradiated with an ultraviolet light source, and the luminescence signal is captured by an image acquisition device (such as an industrial camera) to determine whether the injection is full and whether there are voids or loose areas. This non-destructive testing method based on luminescent materials has the advantages of simple operation, intuitive results, and high accuracy, and can effectively improve the level of engineering quality control.

[0083] In summary, this construction method combines modular assembly, flexible adaptive assembly, multiple sealing protection, and intelligent detection technology, which not only improves the construction efficiency and quality of prefabricated component connection nodes, but also enhances the overall reliability and durability of the structure. It is suitable for various prefabricated engineering scenarios such as high-rise buildings, bridges, and underground integrated pipe corridors.

[0084] The above description discloses only one preferred embodiment of the present invention, and should not be construed as limiting the scope of the present invention. Those skilled in the art will understand that all or part of the processes of the above embodiments can be implemented, and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A prefabricated component connection structure, comprising a sleeve, the sleeve being threadedly connected to a reinforcing bar, characterized in that, It also includes connecting rods, limiting plates, injection sleeves, and support elastic components; The connecting rod is threaded onto the sleeve, the limiting plate is fixed to the connecting rod, the limiting plate is disposed inside the injection sleeve, and the supporting elastic element is disposed inside the injection sleeve for supporting the limiting plates installed on both sides of the injection sleeve; the limiting plate includes a limiting plate body, a second elastic element, and a connecting block, the connecting block has a triangular contact surface, the connecting block is slidably disposed on the limiting plate body, and the second elastic element is disposed between the limiting plate body and the connecting block; the prefabricated component connection structure also includes a sealing structure, the sealing structure being used to seal the gap between the connecting rod and the injection sleeve; the sealing structure includes a pressure block and a sealing... The sealing structure comprises a sealing layer, a third elastic element, and a locking rod. The pressure block is slidably mounted on the connecting rod, and the locking rod is rotatably mounted on one side of the pressure block and detachably connected to the sleeve. The third elastic element is disposed between the pressure block and the sleeve, and the sealing layer is fixed to one side of the pressure block. The sealing structure also includes a water-swellable sealing strip, which is fixed between the sealing layer and the injection sleeve body. The locking rod comprises a rotating rod body, an elastic layer, and a locking block. The rotating rod body is rotatably mounted on the pressure block, the elastic layer is disposed on the rotating rod body, and the locking block is slidably mounted on the pressure block. A locking groove is provided on the connecting rod corresponding to the locking block.

2. The prefabricated component connection structure as described in claim 1, characterized in that, The filling sleeve includes a filling sleeve body, an overflow pipe, and a one-way valve. The filling sleeve body has a filling port and an exhaust port. The filling port and the exhaust port are located at the top of the filling sleeve body. The overflow pipe is located on one side of the filling sleeve body. The one-way valve is connected to the overflow pipe and is located inside the filling sleeve body.

3. The prefabricated component connection structure as described in claim 2, characterized in that, The supporting elastic element includes a support rod, a spring, and two contact plates. The support rod is fixed in the middle of the injection sleeve body, the spring is fixed on the support rod, and the contact plates are fixed at both ends of the spring.

4. A construction method for a prefabricated component connection structure, employing the prefabricated component connection structure described in any one of claims 1 to 3, characterized in that, include: Connect the two sleeves to the two steel bars to be installed, and install the two connecting rods onto the two sleeves respectively; Place the injection sleeve on one of the limiting plates and press down on the injection sleeve to compress the support elastic element, so that the injection sleeve can move into the other limiting plate. Release the injection sleeve so that the two limiting plates remain stable under the support of the support elastic element. Seal the connection between the injection sleeve and the connecting rod; Pour solidification material into the injection sleeve through the opening on the injection sleeve and wait for solidification to complete.

5. The construction method for a prefabricated component connection structure as described in claim 4, characterized in that, The solidified material contains a luminescent material, which is used for filling degree detection using ultraviolet light after solidification.

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