Assembly type prefabricated part connecting structure and construction method thereof

Abstract

The invention relates to the field of building structural parts, in particular to an assembly type prefabricated part connecting structure and a construction method thereof.The assembly type prefabricated part connecting structure comprises a sleeve which is in threaded connection to a steel bar and further comprises a connecting rod, a limiting disc, a pouring sleeve and a supporting elastic part; the connecting rod is connected to the sleeve in a threaded mode, the limiting discs are fixed to the connecting rod and arranged in the pouring sleeve, and the supporting elastic pieces are arranged in the pouring sleeve and used for supporting the limiting discs installed on the two sides of the pouring sleeve. The perfusion sleeve can be stabilized at a preset position by pre-supporting the two connecting rods through the supporting elastic piece, and then direct perfusion can be performed, so that the operation process is simplified, and the operation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of building structures, in particular to a prefabricated component connection structure and a construction method thereof. BACKGROUND

[0002] The prefabricated component connection structure refers to the node and joint structure used to connect various prefabricated components (such as wall panels, floor slabs, beams, and columns) in prefabricated 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 techniques include mechanical connection (such as bolts and welding), cast-in-place concrete connection, and prestressed connection.

[0003] The existing connection method mainly connects through a sleeve and a steel bar, then installs a connecting rod on the sleeve, and pours a setting material into a cavity to connect the two connecting rods. This method requires pre-fixing the cavity before pouring, which increases the number of work steps and reduces work efficiency. SUMMARY

[0004] The present application provides a prefabricated component connection structure and a construction method thereof, which can stabilize the pouring sleeve at a preset position by pre-supporting the two connecting rods with a supporting elastic member, and then directly pouring, simplifying the operation process and improving the operation efficiency.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present application provides a prefabricated component connection structure, comprising a sleeve, the sleeve being threadedly connected to a steel bar, further comprising a connecting rod, a limiting disc, a pouring sleeve, and a supporting elastic member; the connecting rod is threadedly 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 member is arranged in the pouring sleeve and used to support the limiting discs arranged on both sides of the pouring sleeve.

[0006] The limiting disc comprises a limiting disc body, a second elastic member, and a connecting block, the connecting block has a triangular contact surface, the connecting block is slidingly arranged on the limiting disc body, and the second elastic member is arranged between the limiting disc body and the connecting block.

[0007] The pouring sleeve comprises a pouring sleeve body, an overflow pipe, and a one-way valve, the pouring sleeve body has a pouring port and an exhaust port, the pouring port and the exhaust port are arranged at the top of the pouring sleeve body, the overflow pipe is arranged on one side of the pouring sleeve body, and the one-way valve is connected with the overflow pipe and located in the pouring sleeve body.

[0008] The supporting elastic piece comprises a supporting rod, a spring and two contact plates, the supporting rod is fixed in the middle of the pouring sleeve body, the spring is fixed on the supporting rod, and the two ends of the spring are fixed with the contact plates.

[0009] The assembly type prefabricated component connecting structure further comprises a sealing structure, and the sealing structure is used for sealing the gap between the connecting rod and the pouring sleeve.

[0010] The sealing structure comprises a pressing block, a sealing layer, a third elastic piece and a locking rod, the pressing block is slidingly arranged on the connecting rod, the locking rod is rotatably arranged on one side of the pressing block and detachably connected with the sleeve, the third elastic piece is arranged between the pressing block and the sleeve, and the sealing layer is fixed on one side of the pressing block.

[0011] The sealing structure further comprises a water-swelling waterstop, and the water-swelling waterstop is fixed between the sealing layer and the pouring sleeve body.

[0012] The locking rod comprises a rotating rod body, an elastic layer and a clamping block, the rotating rod body is rotatably arranged on the pressing block, the elastic layer is arranged on the rotating rod body, the clamping block is slidingly arranged on the pressing block, and a clamping groove is arranged on the connecting rod and corresponds to the clamping block.

[0013] In the second aspect, the application further provides a construction method of the assembly type prefabricated component connecting structure, comprising: Two sleeves are connected with two to-be-installed steels respectively, and two connecting rods are installed on the two sleeves respectively; The pouring sleeve is sleeved on one limiting disc, and the pouring sleeve is pressed to compress the supporting elastic piece, so that the pouring sleeve leaves a space to enter the other limiting disc, and the pouring sleeve is loosened, so that the two limiting discs are kept stable under the support of the supporting elastic piece; The connecting part of the pouring sleeve and the connecting rod is sealed; The pouring sleeve is poured into the pouring sleeve through the opening of the pouring sleeve, and waiting for the solidification to be completed.

[0014] The solidification material is provided with a luminous material, and the luminous material is used for filling degree detection by ultraviolet rays after solidification is completed.

[0015] The assembly type prefabricated component connecting structure and the construction method thereof, one end of the sleeve is provided with an internal thread, the internal thread is threadedly connected with the steel embedded in the prefabricated component, and preliminary anchoring and fixing are realized; the connecting rod is provided with an external thread at two ends, one end is threadedly connected with the other end of the sleeve, and a stable mechanical connecting structure is formed.

[0016] The connecting rod is fixedly provided with a limiting disc, and the number of the limiting disc is two, which are respectively located at two sides of the interior of the pouring sleeve. The pouring sleeve is a hollow cylindrical structure, the interior space of which is used for accommodating the limiting disc and the supporting elastic piece, and after installation is completed, the overall stress and force transmission function of the connecting structure is realized by pouring high-strength non-shrinkage grouting material or concrete. The two ends of the pouring sleeve are provided with sealing structures, which prevent the leakage of the grouting material during pouring, and at the same time ensure the compactness and durability of the connecting part.

[0017] The supporting elastic piece is arranged between the two limiting discs, which is made of a spring or other elastic material with compression performance, and its function is to apply a certain pre-tightening force to the limiting disc before pouring, so that the threaded connection between the connecting rod and the sleeve is more compact, and the stability of the overall connection is enhanced. At the same time, during the subsequent pouring process, the supporting elastic piece can also absorb part of the construction error and temperature deformation stress, avoid structural damage caused by external load changes, and improve the seismic performance and durability of the connecting joint.

[0018] Therefore, the pouring sleeve can be stabilized at the preset position by the pre-supporting of the supporting elastic piece on the two connecting rods, and then direct pouring can be carried out, which simplifies the operation process and improves the operation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0020] Figure 1 is a structural diagram of a fabricated prefabricated component connecting structure of the present application.

[0021] Figure 2 is a right side structural diagram of a fabricated prefabricated component connecting structure of the present application.

[0022] Figure 3 is a left side structural diagram of a fabricated prefabricated component connecting structure of the present application.

[0023] Figure 4 is a sectional structural diagram of a fabricated prefabricated component connecting structure of the present application.

[0024] Figure 5 is Figure 4 Detail A is a partial enlarged view.

[0025] Figure 6 is Figure 4 Detail B is a partial enlarged view.

[0026] sleeve 101, connecting rod 102, limiting disc 103, pouring sleeve 104, supporting elastic member 105, limiting disc body 106, second elastic member 107, connecting block 108, pouring sleeve body 109, overflow pipe 110, one-way valve 111, supporting rod 112, spring 113, contact plate 114, pressing block 115, sealing layer 116, third elastic member 117, locking rod 118, water-swelling waterstop 119, rotating rod body 120, elastic layer 121, clamping block 122. DETAILED DESCRIPTION

[0027] Embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0028] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, in the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0029] First embodiment Please refer to Figures 1-6 The present application provides a prefabricated component connecting structure, comprising a sleeve 101, the sleeve 101 is threadedly connected to the steel bar, further comprising a connecting rod 102, a limiting disc 103, a pouring sleeve 104 and a supporting elastic member 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 arranged in the pouring sleeve 104, and the supporting elastic member 105 is arranged in the pouring sleeve 104 and used for supporting the limiting discs 103 installed on both sides of the pouring sleeve 104.

[0030] In the present embodiment, one end of the sleeve 101 is provided with an internal thread, which is threadedly connected with the steel bar pre-buried in the prefabricated component, to realize preliminary anchoring and fixing; the connecting rod 102 is provided with external threads at both ends, one end of which is threadedly connected with the other end of the sleeve 101, to form a stable mechanical connecting structure.

[0031] A limiting disc 103 is fixedly arranged on the connecting rod 102, and the number of the limiting disc 103 is two, which are respectively located at two sides inside the pouring sleeve 104. The pouring sleeve 104 is a hollow cylindrical structure, the internal space of which is used for accommodating the limiting disc 103 and the supporting elastic member 105, and after installation is completed, the pouring sleeve 104 is filled with high-strength non-shrinkage grouting material or concrete to realize the overall stress and force transmission functions of the connecting structure. The two ends of the pouring sleeve 104 are provided with sealing structures to prevent leakage of the grouting material during pouring, and to ensure the compactness and durability of the connecting part.

[0032] The supporting elastic member 105 is arranged between the two limiting discs 103, and the supporting elastic member 105 is made of a spring 113 or other elastic materials with compression performance, which functions to apply a certain pre-tightening force to the limiting disc 103 before pouring, so that the threaded connection between the connecting rod 102 and the sleeve 101 is more compact, and the stability of the overall connection is enhanced. At the same time, during the subsequent pouring process, the supporting elastic member 105 can also absorb part of the construction error and temperature deformation stress, avoid structural damage caused by external load changes, and thus improve the anti-seismic performance and durability of the connecting joint.

[0033] Therefore, the pouring sleeve 104 can be stably positioned at a preset position by the pre-supporting of the supporting elastic member 105 on the two connecting rods 102, and then direct pouring can be carried out, which simplifies the operation process and improves the operation efficiency.

[0034] The grouting material used in the application is high-strength non-shrinkage cement-based grouting material, which meets the requirements of the national standard “GB / T50448-2015 Cement-based Grouting Material Application Technical Specification” of type IV. The key performance indicators include: 1-day compressive strength not less than 35MPa, 3-day compressive strength not less than 60MPa, and 28-day compressive strength not less than 85MPa; vertical expansion rate of 0.02% to 0.10%; initial fluidity not less than 300mm, 30-minute fluidity retention rate not less than 90%; chloride ion content not more than 0.05%; and bleeding rate of 0%. The grouting material has excellent fluidity, micro-expansion and long-term durability, and is suitable for high-precision fabricated node connection.

[0035] The luminescent material mixed in the grouting material is a rare earth doped strontium aluminate fluorescent powder (chemical formula is SrAl2O4:Eu 2 ,Dy 3), with a particle size range of 10 to 30 microns. The material can emit green visible light with a wavelength of 520 nm under 365 nm ultraviolet light (UV-A band) excitation. The luminescent material is uniformly incorporated at 1.0% of the total mass of the dry grouting powder. Laboratory tests have verified that at this dosage, the 28-day compressive strength of the grouting material decreases by no more than 3%, the fluidity loss is no more than 5%, and the impact on structural performance is negligible. 24 hours after grouting is complete, a 365 nm ultraviolet light source can be used to irradiate the connection area, and a fluorescence image can be collected using an industrial camera with a 520 nm bandpass filter. If the grouting is full, the entire grouting sleeve will present a uniform and continuous fluorescence; if there are voids or areas that are not fully grouted, there will be no fluorescence signal at the corresponding location, thereby achieving non-destructive, visual filling degree detection.

[0036] The supporting elastic member 105 is composed 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 50 mm, a working compression stroke of 10 mm, and a stiffness coefficient of 20 N / mm. It is pre-compressed by 5 mm during installation, providing an initial pre-tightening force of 100 N; the maximum working load is 300 N, corresponding to a total compression of 15 mm; the fatigue life is not less than 10 5 cycles. The contact plates 114 are made of Q235 steel and have a knurled surface with a friction coefficient of not less than 0.4 to ensure effective force transmission with the end face of the limiting disc.

[0037] The limiting disc 103 includes a limiting disc body 106, a second elastic member 107, and a connecting block 108, the connecting block 108 has a triangular contact surface, the connecting block 108 is slidingly arranged on the limiting disc body 106, and the second elastic member 107 is arranged between the limiting disc body 106 and the connecting block 108.

[0038] The outer end surface 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 grouting sleeve 104, thereby enhancing the friction and anti-slippage ability between the limiting disc 103 and the grouting sleeve 104 when the connecting structure is subjected to external loads. The connecting block 108 is slidingly arranged on the limiting disc body 106 and can move in the radial direction in the sliding groove or guide rail structure of the limiting disc body 106, thereby achieving self-adaptive adjustment of external loads.

[0039] The second elastic member 107 is arranged between the limiting disc body 106 and the connecting block 108, usually adopts a compression spring 113, a rubber pad or other materials with elastic performance, and mainly provides a reset force for the connecting block 108, so that the triangular contact surface maintains a certain initial adhesion pressure under the condition of no external force. When the limiting disc 103 is inserted into the pouring sleeve 104 with the connecting rod 102, if there is unevenness or size deviation on the inner wall of the pouring sleeve 104, the connecting block 108 will be radially displaced under the action of the contact force, and the second elastic member 107 will be compressed; once passing through the highest point, the elastic member pushes the connecting block 108 to automatically reset, so as to realize the flexible engagement between the limiting disc 103 and the pouring sleeve 104, and enhance the stability and sealing performance of the connecting joint.

[0040] The second elastic member 107 is arranged between the limiting disc body 106 and the connecting block 108, adopts a small compression spring made of stainless steel 304, has a stiffness coefficient of 15 N / mm, a pre-compression amount of 2 mm, and provides a reset force of 30 N, so that the connecting block 108 can radially slide within the range of 0 to 4 mm, so as to adapt to the manufacturing tolerance of ±1 mm of the inner diameter of the pouring sleeve.

[0041] The connecting block 108 in the limiting disc 103 is provided with a triangular contact surface, the wedge angle of which is 15°, and the length of the contact surface is 12 mm. Four connecting blocks are uniformly distributed in the circumference of each limiting disc, and only radially slide on the limiting disc body along the T-shaped guide rail. Under the action of 10 kN axial load, the wedge-shaped structure can generate a radial component force of about 2.7 kN, combined with the friction coefficient of the contact surface, so that the anti-sliding bearing capacity is increased by about 40%, and the stability of the connecting joint under the stress state is significantly enhanced.

[0042] The pouring sleeve 104 includes a pouring sleeve body 109, an overflow pipe 110 and a one-way valve 111. The pouring sleeve body 109 has a pouring port and an exhaust port, which are arranged at the top of the pouring sleeve body 109. The overflow pipe 110 is arranged on one side of the pouring sleeve body 109, and the one-way valve 111 is connected with the overflow pipe 110 and located in the pouring sleeve body 109.

[0043] The pouring sleeve body 109 is a hollow cylindrical structure, which is used for accommodating the limiting disc 103, the supporting elastic member 105 and the subsequent poured high-strength non-shrinkage grouting material or concrete material, and is a key component for realizing the force transmission and connection between prefabricated components. The pouring sleeve body 109 is provided with a pouring port and an exhaust port at the top, wherein the pouring port is used for injecting grouting material, and the exhaust port is used for discharging internal air during the pouring process to prevent the generation of air bubbles and affect the pouring density, so as to ensure the quality and strength of the connecting joint.

[0044] An overflow pipe 110 is arranged on one side of the pouring sleeve body 109, which is in communication with the inside of the pouring sleeve 104. The main function is to automatically guide the excess slurry out when the slurry fills to a certain height during pouring, and at the same time, the residual bubbles at the bottom can be discharged through the position of the overflow pipe 110, avoiding pressure accumulation or material waste caused by excessive pouring. At the same time, by observing whether the slurry flows out of the overflow pipe 110, it can be judged whether the pouring is completed and reaches the full state, improving the controllability of construction quality.

[0045] The one-way valve 111 is connected with the overflow pipe 110 and located inside one side of the pouring sleeve body 109. The one-way valve 111 has the function of allowing the grouting material to flow out from the inside of the pouring sleeve 104, preventing the slurry from flowing back or retracting after pouring is completed, so as to ensure that the slurry in the pouring sleeve 104 is full and dense, and improve the integrity and durability of the connection node.

[0046] The supporting elastic member 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 pouring sleeve body, the spring 113 is fixed on the support rod 112, and the two ends of the spring 113 are fixed with the contact plates 114.

[0047] The support rod 112 is fixedly installed at the middle position of the pouring sleeve body 109, and is usually firmly combined with the inner wall of the pouring sleeve 104 by welding or bolt connection, etc., to ensure that it will not be displaced or loosened during construction and structural stress. The support rod 112, as the core bearing component of the entire supporting elastic member 105, plays a role in positioning and supporting the spring 113 and the contact plate 114.

[0048] The spring 113 is sleeved on the support rod 112. The spring 113 is preferably a high-elasticity and fatigue-resistant compression spring 113. Different spring 113 materials with different stiffness coefficients 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 rebounding capacity during the assembly of the connecting member, to absorb the small displacement caused by installation error, temperature change or external load, thereby enhancing the adaptability and stability of the connecting node.

[0049] The contact plates 114 are respectively fixed at the two ends of the spring 113. The contact plates 114 are generally made of high-strength metal plates, and the surface can be provided with anti-skid lines or rubber pads to enhance the contact friction force and force transmission efficiency between the contact plates 114 and the limiting disc 103. The two contact plates 114 respectively face the limiting discs 103 installed on the two sides of the inside of the pouring sleeve 104, and tightly fit with the end faces thereof. Under the pre-pressing state of the spring 113, the limiting discs 103 are uniformly pressed to form a bidirectional supporting action.

[0050] The assembled prefabricated component connecting structure further comprises a sealing structure for sealing the gap between the connecting rod 102 and the pouring sleeve 104.

[0051] The sealing structure comprises a pressing block 115, a sealing layer 116, a third elastic member 117 and a locking rod 118, the pressing block 115 is slidingly arranged on the connecting rod 102, the locking rod 118 is rotatably arranged on one side of the pressing block 115 and detachably connected with the sleeve 101, the third elastic member 117 is arranged between the pressing block 115 and the sleeve 101, and the sealing layer 116 is fixed on one side of the pressing block 115.

[0052] The sealing structure further comprises a water-swelling sealing strip 119 fixed between the sealing layer 116 and the pouring sleeve body 109.

[0053] The pressing block 115 is annular or split structure, slidingly arranged on the connecting rod 102 and movable in the axial direction of the connecting rod 102 for installation and adjustment. The pressing block 115 is usually made of high-strength metal material, and the surface is treated to prevent corrosion to enhance its durability and environmental adaptability. A locking rod 118 is arranged at one end of the pressing block 115, which is rotatably arranged on the pressing block 115 by hinging and can be detachably connected with the locking structure (such as threaded hole or clamping groove) on the sleeve 101. By rotating the locking rod 118 and fixing it on the sleeve 101, the position of the pressing block 115 can be locked, so as to ensure the stability of the sealing structure during construction.

[0054] The third elastic member 117 is arranged between the pressing block 115 and the sleeve 101, which is usually a compression spring 113 or other elastic polymer material, which provides a certain pre-tightening force for the pressing block 115, so that it always applies pressure to the pouring sleeve 104, thereby ensuring the close fit between the sealing layer 116 and the pouring sleeve 104 and improving the sealing effect.

[0055] The sealing layer 116 is fixed on one side of the pressing block 115 close to the pouring sleeve 104, which is preferably rubber, silicone or other sealing material with good elasticity and wear resistance, and its shape can be designed according to the gap between the connecting rod 102 and the pouring sleeve 104, such as annular, conical or multi-lip structure, to enhance the sealing performance. The sealing layer 116 not only plays a physical isolation role, but also can be elastically deformed under pressure to further fill the possible small gaps and achieve more stringent sealing.

[0056] In the sealing structure, the pressing block 115 is a split two-half ring structure, the inner diameter is 0.2mm larger than the outer diameter of the connecting rod 102, facilitating sliding installation, the material is ZL102 cast aluminum, and the surface is treated by anodic oxidation. The outer periphery of the connecting rod 102 is provided with four evenly distributed clamping grooves, the groove width is 6mm, the depth is 3mm, and the chamfer R1 is provided. The clamping block 122 at the end of the locking rod 118 is made of PA66 with 30% glass fiber, the size is 5.8mm wide and 2.8mm high, and the clamping block 122 is matched with the clamping groove in H8 / f7 tolerance, ensuring reliable embedding and manual unlocking. The third elastic element 117 is a compression spring, the stiffness coefficient is 10N / mm, the pre-pressing amount is 3mm, and about 30N of continuous sealing force is provided. The sealing layer 116 adopts fluororubber (FKM) material, the Shore hardness is 70A, the cross section is a double-lip structure, and a sealing pressure of not less than 0.5MPa can be generated under 30% compression rate. The water-swelling waterstop 119 adopts BW-96 type water-swelling rubber, the free state cross section size is 5mm*5mm, the static water swelling rate is not less than 220% in 7 days, and the pre-compression is 20% during installation, forming a double waterproof barrier.

[0057] In addition, the sealing structure further comprises a water-swelling waterstop 119 fixedly arranged between the sealing layer 116 and the pouring sleeve body 109, which is usually made of water-swelling rubber or high polymer composite material. When water seeps into the connecting part, the water-swelling waterstop 119 will swell by absorbing water, automatically filling the gap caused by temperature change or structural deformation, forming a secondary waterproof barrier, thereby significantly improving the sealing capacity of the entire connecting joint.

[0058] The locking rod 118 comprises a rotating rod body 120, an elastic layer 121 and a clamping block 122, the rotating rod body 120 is rotatably arranged on the pressing block 115, the elastic layer 121 is arranged on the rotating rod body 120, and the clamping block 122 is slidably arranged on the pressing block 115, and a clamping groove is arranged on the connecting rod 102 corresponding to the clamping block 122.

[0059] The elastic layer 121 is arranged on the outer side surface of the rotating rod body 120, which can be made of rubber, silicone or other high molecular materials with high elasticity and wear resistance, used for increasing the friction between the locking rod 118 and the connecting part of the sleeve 101, and also used for buffering during locking, preventing damage or slipping of the components caused by rigid contact. In addition, the elastic layer 121 can also adapt to connecting members of different sizes to some extent, improving the universality and adaptability of the locking rod 118.

[0060] The clamping block 122 is fixedly arranged at the outer end of the elastic layer 121, and is a plastic or metal piece with a certain hardness, so as to realize stable cooperation with the clamping groove on the connecting rod 102. When the lock rod 118 is rotated to the locking position, the clamping block 122 is embedded into the clamping groove at the corresponding position of the connecting rod 102, forming mechanical engagement, thereby firmly positioning the pressing block 115 on the connecting rod 102, and ensuring that the sealing structure does not displace or loosen during the grouting construction process.

[0061] Further, the clamping grooves are distributed in multiple circumferential directions along the connecting rod 102, so as to adapt to the locking requirements of different angles and improve the installation flexibility. When the lock rod 118 is locked, the third elastic piece 117 is compressed, and the elastic force acts on the pressing block 115, so that the clamping block 122 is more tightly embedded into the clamping groove, thereby enhancing the stability and reliability of the overall connection.

[0062] In summary, the structure of the lock rod 118 realizes effective locking of the pressing block 115 through the cooperative design of the rotating rod body 120, the elastic layer 121 and the clamping block 122, thereby improving the stability of the sealing structure during the construction process, enhancing the assembly efficiency and safety of the connection node, and being suitable for various assembly type prefabricated component connection systems with high sealing and waterproof requirements, and having good engineering application prospect.

[0063] Second embodiment The application also provides a construction method of the assembly type prefabricated component connection structure, comprising: S201, respectively connecting two sleeves 101 with two steel bars to be installed, and respectively installing two connecting rods 102 on the two sleeves 101; First, respectively threadedly connecting two sleeves 101 with embedded steel bars in two prefabricated components to be connected. One end of the sleeve 101 is provided with an internal thread, which is fixedly connected with an external thread on the steel bar through rotation, so as to ensure firm connection and reliable force transmission. Then, respectively threadedly connecting two connecting rods 102 to the respective sleeves 101, and the connecting rod 102 is provided with an external thread at both ends, one end of which is connected with the sleeve 101, and the other end is used for connecting the limiting disc 103. After this step, two connectable connection systems composed of steel bars-sleeves 101-connecting rods 102 are formed.

[0064] S202, sleeving the pouring sleeve 104 on one limiting disc 103, and pressing the pouring sleeve 104 to compress the supporting elastic piece 105, so as to leave space for the pouring sleeve 104 to enter the other limiting disc 103, and then loosening the pouring sleeve 104, so that the two limiting discs 103 are stably supported by the supporting elastic piece 105; The pouring sleeve 104 is sleeved on a limiting disc 103, and the pouring sleeve 104 is pressed in the axial direction of the connecting rod 102 to compress the supporting elastic member 105 inside the pouring sleeve 104, so that space is left between the two limiting discs 103. At this time, the pouring sleeve 104 is continuously pushed to smoothly slide through the first limiting disc 103 and enter the position of the second limiting disc 103. When the pouring sleeve 104 passes through the second limiting disc 103, the pressure is released, the supporting elastic member 105 returns to its original state and pushes the pouring sleeve 104 to reset, so that the two limiting discs 103 are located on both sides of the pouring sleeve 104 and are stably clamped under the action of the supporting elastic member 105. This process not only realizes quick centering and positioning, but also improves the safety and adaptability of the assembly process through elastic buffering.

[0065] The “downward pressing of the pouring sleeve” operation needs to use a special pressing tool or a manual hydraulic push rod, and the applied force is controlled within 400 N, and the compression stroke of the supporting elastic member 105 is 10±1 mm. The stroke is sufficient to make the pouring sleeve 104 smoothly pass through the first limiting disc and be sleeved into the position of the second limiting disc. After the pressure is released, the supporting elastic member should automatically reset within 2 seconds, so that the two limiting discs are symmetrically clamped on both sides of the pouring sleeve, and the deviation between the connecting rod axis and the pouring sleeve axis is not more than 0.5 mm.

[0066] The pouring operation is performed according to the following process: first, confirm the locking of the sealing structure; open the top exhaust port, temporarily block the overflow pipe outlet; continuously inject grouting material from the pouring port at a flow rate of about 2 L / min; when the exhaust port continuously and stably discharges bubble-free slurry for 10 seconds, the exhaust port is closed; then the overflow pipe outlet is opened, and the grouting continues until the overflow pipe stably discharges slurry for more than 5 seconds; at this time, the one-way valve 111 is automatically closed under the action of the internal pressure (opening pressure 0.05 MPa) to prevent backflow of the slurry. The judgment standard for completion of pouring is that the overflow pipe discharges slurry, the exhaust port is compact, and the slurry surface at the pouring port does not sink. After the pouring is completed, it needs to be cured in an environment with a temperature not lower than 10°C and a humidity not lower than 90% for not less than 24 hours.

[0067] The ultraviolet detection is performed 24 hours after the pouring is completed. A 365 nm LED ultraviolet lamp with a power not less than 3 W is used to irradiate the pouring area, and an industrial camera with a 520 nm filter is used to take images in a dark environment. If the fluorescence is uniform and continuous, it is determined that the pouring is full; if there is no fluorescence in some areas, it is determined that there are voids, and re-pouring or marking for rework treatment is needed.

[0068] S203 seals the connection between the pouring sleeve 104 and the connecting rod 102; To prevent leakage of grout during subsequent grouting, a sealing structure is installed at the gap between the pouring sleeve 104 and the connecting rod 102. The sealing structure includes components such as the pressing block 115, the sealing layer 116, the third elastic member 117, the locking rod 118, and the water-swelling sealing strip 119. By rotating the locking rod 118 to make it snap into the snap groove on the connecting rod 102, the pressing block 115 is driven to press the sealing layer 116, and the third elastic member 117 provides continuous pressure to ensure that the sealing layer 116 forms a tight contact with the pouring sleeve 104 and the connecting rod 102. In addition, the water-swelling sealing strip 119 will automatically swell in a humid environment, further enhancing the waterproof performance.

[0069] S204 Grout the pouring sleeve 104 through the opening on the pouring sleeve 104, and wait for the solidification to complete.

[0070] The solidification material is provided with a luminescent material, which is used for filling degree detection after solidification is completed.

[0071] After sealing, the pouring port provided at the top of the pouring sleeve 104 is used to inject the solidification material, such as high-strength non-shrinkage grout or micro-expanding concrete. During the pouring process, the overflow pipe 110 can be used to observe whether the grout fills the entire internal space of the pouring sleeve 104, and air is discharged through the air vent to ensure that the pouring is dense. After pouring is completed, the solidification material is allowed to fully harden to form a stable connection node.

[0072] The solidification material is pre-mixed with luminescent materials, such as fluorescent powder or ultraviolet-responsive additives, which do not change significantly under ordinary light but emit visible light of a specific wavelength under ultraviolet irradiation. After solidification is completed, the pouring area is irradiated with an ultraviolet light source, and the luminescent signal is captured by an image acquisition device (such as an industrial camera) to determine whether the pouring is full, whether there are voids or non-dense areas. This non-destructive detection method based on luminescent materials has the advantages of simple operation, intuitive results, high precision, and can effectively improve the engineering quality control level.

[0073] In summary, the construction method combines modular assembly, elastic adaptive assembly, multiple sealing protection, and intelligent detection technology, which not only improves the construction efficiency and quality of the connection node of the prefabricated component, but also enhances the reliability and durability of the overall structure, and is suitable for various prefabricated engineering scenes such as high-rise buildings, bridges, underground comprehensive pipe galleries, etc.

[0074] The above disclosure is only one preferred embodiment of the present application, and of course cannot limit the scope of the present application. Those skilled in the art can understand that the above-mentioned processes can be implemented in whole or in part, and equivalent changes made in accordance with the claims of the present application still fall within the scope of the present application.

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 to 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 to support the limiting plates installed on both sides of the injection sleeve.

2. The prefabricated component connection structure as described in claim 1, characterized in that, 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.

3. The prefabricated component connection structure as described in claim 2, 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.

4. The prefabricated component connection structure as described in claim 3, 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.

5. The prefabricated component connection structure as described in claim 4, characterized in that, 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.

6. The prefabricated component connection structure as described in claim 5, characterized in that, 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.

7. The prefabricated component connection structure as described in claim 6, characterized in that, The sealing structure also includes a water-swellable sealing strip, which is fixed between the sealing layer and the injection sleeve body.

8. The prefabricated component connection structure as described in claim 7, characterized in that, 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.

9. A construction method for a prefabricated component connection structure, employing the prefabricated component connection structure described in any one of claims 1 to 8, 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.

10. The construction method for a prefabricated component connection structure as described in claim 9, 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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