A modular concrete precast

Abstract

This invention discloses a modular precast concrete component, relating to the field of precast building component technology. In this invention: a male end splicing component and a female end splicing component are respectively provided at both ends of the precast component body. The male end splicing component is equipped with an elastic latch, a bottom connector, an extended tube, and a through grouting channel. The female end splicing component has a snap-fit ​​groove and a locking groove. The elastic latch includes a welding root, a beveled part, a limiting part, an inner snap-fit ​​part, and a latch hole. The bottom connector is machined with vertical and horizontal holes. The bottom side of the male end splicing component has a protrusion forming a flow gap. The flow channel connects the extended tube, the flow gap, the embedded groove, and the mortar filling gap. Adjacent precast components are snapped together by the male and female components, and then grouting is performed. The mortar fills each gap, forming a strong and sealed connection structure. This invention achieves rapid and precise splicing of precast components, effectively improving connection strength and sealing performance, and is adaptable to industrial production and rapid on-site construction.

Description

Technical Field

[0001] This invention relates to the field of precast building components, and more particularly to a composite precast concrete component. Background Technology

[0002] Precast concrete components are important parts of industrialized construction. Currently, the splicing of modular precast concrete components mostly uses traditional methods such as bolt connections, welding, or simple lap joints, which presents two major technological bottlenecks:

[0003] Firstly, the assembly efficiency and positioning accuracy are insufficient. Traditional splicing procedures are cumbersome and on-site construction processes are complex, making it difficult to meet the needs of rapid construction. Furthermore, the splicing parts lack precise limiting and guiding structures, which can easily lead to offset and misalignment during assembly, directly affecting the flatness and stability of the overall structure and failing to meet the requirements of efficient industrial assembly.

[0004] Secondly, the splicing sealing and connection strength are insufficient. Relying solely on mechanical connections cannot form a complete sealed structure, and water seepage and grout leakage are prone to occur at the splicing points. After long-term use, they are prone to loosening and cracking, which significantly reduces the structural safety and service life. Although some precast components adopt on-site secondary grouting, the grouting channel design is unreasonable, and the mortar cannot fill the splicing gaps evenly, which easily leads to problems such as hollow areas and incomplete filling. It is difficult to effectively improve the connection strength, and the reliability of the limiting and snap-fit ​​structure is poor, which restricts the industrial promotion and application of composite precast concrete components. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0006] This invention provides a modular precast concrete component, comprising a precast component body, with one end precast as a pair of male end splicing assemblies and the other end precast as a pair of female end splicing assemblies. The male end splicing assembly includes elastic latches mounted on both sides and a bottom connector on its bottom side. The female end splicing assembly includes a locking groove that mates with the male end splicing assembly, with locking grooves on both sides of the locking groove that mate with the elastic latches. The elastic latches include a welding root, a beveled portion, a limiting portion, and an inner locking portion. The male end splicing assembly has an embedded locking groove, and the inner locking portion is limited and installed in the embedded locking groove. The beveled portion and the limiting portion have latch holes. The male end splicing assembly has an extended tube, and the bottom connector has a transverse hole located outside the male end splicing assembly body, communicating with the extended tube. The male end splicing component has multiple protrusions on its bottom side. The bottom side of the male end splicing component forms a flow gap between the protrusions and the bottom surface of the snap-fit ​​groove. The transverse hole is connected to the flow gap. The male end splicing component has a secondary flow hole and a through hole. The secondary flow hole is connected to the flow gap. The secondary flow hole is connected to the embedded snap-fit ​​groove through the through hole.

[0007] Preferably, the male end splicing component has first limiting protrusions embedded in the prefabricated body on both sides, and the female end splicing component has second limiting protrusions embedded in the prefabricated body on both sides.

[0008] Preferably, the male end splicing component has a pre-fabricated metal fixing frame, and the elastic latch is made of shape memory alloy material. The welding root of the elastic latch is integrally welded to the metal fixing frame.

[0009] Preferably, the outer port of the extension tube is flush with the outer surface of the prefabricated body. The male end splicing assembly body is provided with a top groove and a main flow hole. The extension tube is connected to the top groove, and a cap is snapped into the top groove. At least half of the bottom connector is embedded in the bottom of the male end splicing assembly body. The bottom connector has a vertical hole along the axial direction. The vertical hole is aligned and connected with the main flow hole and the horizontal hole.

[0010] Preferably, an airflow gap is reserved between the male end splicing component body and the two side walls of the snap-fit ​​groove.

[0011] Preferably, a mortar-filled gap is reserved between the inclined part and the limiting part of the elastic latch and the wall surface of the locking groove.

[0012] Preferably, the female end splicing component has a bottom groove on the bottom side of the snap-fit ​​groove, one end of the bottom connector has an upper wedge that is pre-embedded into the male end splicing component, and the other end of the bottom connector has a lower wedge that is inserted into the bottom groove. The horizontal hole is located between the upper wedge and the lower wedge.

[0013] Preferably, the upper wedge and the lower wedge are symmetrically distributed at both ends of the bottom connector, and the upper wedge and the lower wedge are truncated cone-shaped structures, with the shape of the bottom groove matching the shape of the lower wedge.

[0014] Compared with existing technologies, the beneficial effects of this invention are:

[0015] 1. This invention uses the interlocking of male and female splicing components, the automatic locking of elastic latches, and the positioning assistance of limiting structures to quickly and accurately connect prefabricated components, simplifying on-site assembly procedures and effectively solving the problems of splicing offset and misalignment. It can better adapt to the needs of industrialized production and rapid on-site construction.

[0016] 2. This invention, through the design of a through-type grouting channel, allows mortar to evenly fill all splicing gaps. Combined with the elastic tongue mechanical locking and wedge positioning structure, a composite connection of mechanical locking and mortar consolidation is formed, which effectively eliminates voids and gaps, improves the connection strength and waterproof and seepage-proof performance of the splice, avoids loosening and cracking after long-term use, and effectively extends the service life of precast components. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the male end splicing component, the female end splicing component and the prefabricated body integrally formed and assembled in this invention.

[0018] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle.

[0019] Figure 3 for Figure 1 A magnified structural diagram of section B in the middle.

[0020] Figure 4 This is a schematic diagram of the bottom connector in this invention.

[0021] Figure 5 for Figure 2 A magnified structural diagram of part C in the middle.

[0022] Figure 6 This is a schematic diagram of the elastic latch structure in this invention.

[0023] Figure 7 This is a schematic diagram of the structure when adjacent prefabricated components are installed together in this invention.

[0024] Figure 8 for Figure 7 A magnified structural diagram of part D in the middle.

[0025] Wherein: 1-Precast main body; 2-Male end splicing assembly; 201-Embedded slot; 202-Metal fixing frame; 203-Elastic latch; 2031-Welding root; 2032-Beveled part; 2033-Limiting part; 2034-Inner locking part; 2035-Latch hole; 204-Bottom connector; 2041-Upper wedge; 2042-Lower wedge; 2043-Vertical hole; 2044-Horizontal hole; 205-First limiting protrusion; 206-Top groove; 207-Cap; 208-Extended tube; 209-Main flow hole; 210-Protrusion; 211-Secondary flow hole; 212-Conducting hole; 3-Female end splicing assembly; 301-Snap-fit ​​groove; 302-Locking groove; 303-Bottom groove opening; 304-Second limiting protrusion; 4-Filling mortar; 5-Flow gap. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0027] Example 1: This invention designs a composite precast concrete component, with the following specific structural configuration:

[0028] Combination Figures 1 to 5One end of the prefabricated main body 1 is integrally prefabricated into a pair of male end splicing components 2, and the other end is integrally prefabricated into a pair of female end splicing components 3. Elastic latches 203 are installed on both sides of the male end splicing components 2, and a bottom connector 204 is provided on the bottom side. The female end splicing components 3 are provided with snap-fit ​​grooves 301 adapted to the male end splicing components 2. Locking grooves 302 are machined on both side walls of the snap-fit ​​grooves 301, and the locking grooves 302 and the elastic latches 203 form a snap-fit ​​engagement.

[0029] Combination Figure 2 , Figure 5 , Figure 6 The elastic latch 203 consists of a welding root 2031, a beveled portion 2032, a limiting portion 2033, and an inner latch 2034. An embedded latch groove 201 is formed inside the female end splicing component 3, and the inner latch 2034 is fitted into the embedded latch groove 201 for limiting. Latch holes 2035 are formed on both the beveled portion 2032 and the limiting portion 2033. An extension tube 208 is provided inside the male end splicing component 2. The outer port of the extension tube 208 is flush with the outer surface of the prefabricated body 1. At least half of the volume of the bottom connector 204 is embedded in the bottom of the male end splicing component 2. A transverse hole 2044 is machined on the bottom connector 204. The transverse hole 2044 is located outside the male end splicing component 2 and is connected to the extension tube 208.

[0030] Combination Figure 1 , Figure 3 , Figure 4 , Figure 7 , Figure 8 The male end splicing component 2 has multiple protrusions 210 on its bottom side. A flow gap 5 is formed between the male end splicing component 2 and the bottom surface of the snap-fit ​​groove 301 through the protrusions 210. A transverse hole 2044 is connected to the flow gap 5. The male end splicing component 2 also has a secondary flow hole 211 and a through hole 212 machined inside. The secondary flow hole 211 is connected to the flow gap 5, and the secondary flow hole 211 is connected to the embedded snap-fit ​​groove 201 through the through hole 212.

[0031] Combination Figure 1 , Figure 2 The male end splicing component 2 has first limiting protrusions 205 on both sides, which are embedded inside the prefabricated body 1. The female end splicing component 3 has second limiting protrusions 304 on both sides, which are also embedded inside the prefabricated body 1. A prefabricated metal fixing frame 202 is installed inside the male end splicing component 2. The elastic latch 203 is made of shape memory alloy, and the welding root 2031 of the elastic latch 203 is integrally welded to the metal fixing frame 202.

[0032] Combination Figure 1 , Figure 2The male end splicing component 2 has a top groove 206 and a main channel hole 209 machined on its body. The extended tube 208 is connected to the top groove 206. The top groove 206 is fixed to the cap 207 during the integrated prefabrication process. The bottom connector 204 has a vertical hole 2043 machined along the axial direction. The vertical hole 2043 is aligned with and connected to the main channel hole 209. The vertical hole 2043 is also connected to the horizontal hole 2044. A 0.5-2mm airflow gap is reserved between the male end splicing component 2 body and the two side walls of the snap-fit ​​groove 301. A 2-5mm mortar filling gap is reserved between the inclined part 2032 and the limiting part 2033 of the elastic latch 203 and the wall of the locking groove 302.

[0033] Combination Figure 3 , Figure 4 , Figure 8 The female end splicing component 3 has a bottom groove 303 machined on the bottom side of the snap-fit ​​groove 301. One end of the bottom connector 204 is provided with an upper wedge 2041, which is pre-embedded inside the male end splicing component 2. The other end of the bottom connector 204 is provided with a lower wedge 2042, which is inserted into the bottom groove 303. A transverse hole 2044 is located between the upper wedge 2041 and the lower wedge 2042. The upper wedge 2041 and the lower wedge 2042 are symmetrically distributed at both ends of the bottom connector 204. Both the upper wedge 2041 and the lower wedge 2042 are frustum-shaped structures, and the shape of the bottom groove 303 is adapted to the shape of the lower wedge 2042.

[0034] Example 2: The installation method of the combined precast concrete components designed in this invention is as follows:

[0035] The male end splicing component 2, the female end splicing component 3 and the precast body 1 are precast in an integral casting manner. When the male end splicing component 2 is precast, the metal fixing frame 202, the elastic latch 203 and the bottom connector 204 are positioned and installed in advance at the designated position of the male end splicing component 2 (the welding root 2031 of the elastic latch 203 is pre-welded to the corresponding position of the metal fixing frame 202). The cover 207 is pre-installed and fixed in the position of the top groove 206 during the integral precast stage to ensure that each structure is firmly bonded to the concrete matrix. The end of the extension tube 208 is kept flush with the outer surface of the precast body 1. The top groove 206, the main channel hole 209, the vertical hole 2043 and the horizontal hole 2044 form a through closed grouting channel.

[0036] During on-site assembly, the two prefabricated main bodies 1 to be spliced ​​are horizontally aligned. The male end splicing component 2 of one prefabricated main body 1 is smoothly pushed into the snap-fit ​​groove 301 of the female end splicing component 3 of the other prefabricated main body 1. During the pushing process, the inclined surface 2032 of the elastic latch 203 is squeezed by the side wall of the snap-fit ​​groove 301 and undergoes elastic deformation, so that the male end splicing component 2 smoothly enters the snap-fit ​​groove 301.

[0037] After the male-end splicing component 2 is pushed into place, the elastic latch 203 recovers its deformation by its own elasticity, the inner latch 2034 is always limited to the inner slot 201, the limiting part 2033 is inserted into the locking slot 302 to complete the initial locking, and the lower wedge 2042 of the bottom connector 204 is simultaneously inserted into the bottom groove 303. The frustum-shaped wedge structure realizes guidance and positioning. The first limiting protrusion 205 and the second limiting protrusion 304 help limit the lateral displacement of the prefabricated body 1, ensuring that the splicing position is accurate and without misalignment.

[0038] After the splicing is completed, the grouting pipe of the external mortar equipment is directly and tightly connected to the outer pipe opening of the extension pipe 208 on the outer surface of the precast body 1. The mortar equipment is started to carry out grouting operation. During the grouting process, the grouting pressure is kept stable so that the mortar flows into the grouting channel at a uniform speed.

[0039] The mortar passes through the extension pipe 208, top groove 206, main channel hole 209, vertical hole 2043, and horizontal hole 2044 in sequence before entering the flow gap 5. Under pressure, the mortar flows into the embedded slot 201 through the secondary flow hole 211 and the guide hole 212, and then fills the mortar filling gap between the inclined part 2032, the limiting part 2033 and the wall of the locking slot 302 through the tongue hole 2035. At the same time, the air in the airflow gap is gradually discharged during the grouting process to avoid the formation of voids in the gap.

[0040] Continue grouting until mortar seeps evenly from the joint between the two precast main bodies 1, indicating that all gaps in the splicing area have been completely filled with mortar. At this point, turn off the mortar equipment and disconnect the grouting pipe to complete the grouting operation.

[0041] After grouting is completed, the filling mortar 4 is left to cure. After the mortar cures, it forms an integral connection structure with the male end splicing component 2, the female end splicing component 3, the elastic latch 203, and the bottom connector 204. There is no need to disassemble and install the cover 207. The entire process of prefabricated component assembly, splicing and sealing reinforcement is completed directly.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite precast concrete component, characterized in that: The prefabricated body (1) includes a male end splicing component (2) prefabricated at one end and a female end splicing component (3) prefabricated at the other end. The male end splicing component (2) includes elastic latches (203) installed on both sides and a bottom connector (204) on its bottom side. The female end splicing component (3) includes a locking groove (301) that cooperates with the male end splicing component (2). The locking groove (301) has locking grooves (302) on both sides that cooperate with the elastic latches (203). The elastic latch (203) includes a welding root (2031), a beveled part (2032), a limiting part (2033), and an inner latch (2034). The male end splicing component (2) has an embedded latch groove (201). The inner latch (2034) is limited and installed in the embedded latch groove (201). The beveled part (2032) and the limiting part (2033) have latch holes (2035). The male end splicing component (2) is provided with an extension tube (208), and the bottom connector (204) has a horizontal hole (2044) located outside the body of the male end splicing component (2), and the horizontal hole (2044) is connected to the extension tube (208); The male end splicing component (2) has multiple protrusions (210) on its bottom side. The bottom side of the male end splicing component (2) forms a flow gap (5) between the protrusions (210) and the bottom surface of the snap-fit ​​groove (301). The transverse hole (2044) is connected to the flow gap (5). The male end splicing component (2) has a secondary flow hole (211) and a through hole (212). The secondary flow hole (211) is connected to the flow gap (5). The secondary flow hole (211) is connected to the embedded snap-fit ​​groove (201) through the through hole (212).

2. A precast composite concrete component according to claim 1, characterized in that: The male end splicing component (2) has a first limiting protrusion (205) embedded in the prefabricated body (1) on both sides, and the female end splicing component (3) has a second limiting protrusion (304) embedded in the prefabricated body (1) on both sides.

3. A precast composite concrete component according to claim 1, characterized in that: The male end splicing component (2) has a pre-fabricated metal fixing frame (202), and the elastic latch (203) is made of shape memory alloy material. The welding root (2031) of the elastic latch (203) is integrally welded to the metal fixing frame (202).

4. A precast composite concrete component according to claim 1, characterized in that: The outer port of the extended tube (208) is flush with the outer surface of the precast body (1). The male end splicing component (2) has a top groove (206) and a main channel hole (209). The extended tube (208) is connected to the top groove (206). A cap (207) is snapped into the top groove (206). At least half of the bottom connector (204) is pre-embedded in the bottom of the male end splicing component (2). The bottom connector (204) has a vertical hole (2043) along the axial direction. The vertical hole (2043) is aligned and connected with the main hole (209). The vertical hole (2043) is connected with the horizontal hole (2044).

5. A precast composite concrete component according to claim 1, characterized in that: An airflow gap is reserved between the main body of the male end splicing component (2) and the two side walls of the snap-fit ​​groove (301).

6. A composite precast concrete component according to claim 1, characterized in that: A mortar-filled gap is reserved between the inclined part (2032) and the limiting part (2033) of the elastic latch (203) and the wall of the locking groove (302).

7. A precast composite concrete component according to claim 1, characterized in that: The female end splicing component (3) has a bottom groove (303) on the bottom side of the snap-fit ​​groove (301). One end of the bottom connector (204) is provided with an upper wedge (2041) pre-embedded in the male end splicing component (2). The other end of the bottom connector (204) is provided with a lower wedge (2042) inserted into the bottom groove (303). The horizontal hole (2044) is located between the upper wedge (2041) and the lower wedge (2042).

8. A precast composite concrete component according to claim 7, characterized in that: The upper wedge (2041) and lower wedge (2042) are symmetrically distributed at both ends of the bottom connector (204). The upper wedge (2041) and lower wedge (2042) are truncated cone-shaped structures. The shape of the bottom groove (303) matches the shape of the lower wedge (2042).

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