A precast pile assembly with a quick connection structure

Abstract

This utility model discloses a precast pile assembly with a quick-connect structure. The precast pile assembly includes an upper pile body and a lower pile body. The lower end of the upper pile body is provided with a conical boss, and the conical boss has at least one annular groove along its axial direction. The upper end of the lower pile body is provided with a conical groove that cooperates with the conical boss. The conical groove has at least one set of elastic fasteners along its axial direction. The number and position of the elastic fasteners correspond to the number and position of the annular grooves, respectively. Each set of elastic fasteners includes several elastic fasteners arranged circumferentially along the conical groove. The elastic fasteners are bent spring steel sheets. When not compressed, the spring steel sheets protrude towards the inside of the conical groove. When compressed, the spring steel sheets are compressed and embedded in the annular groove to achieve self-locking. The advantage of this utility model is that quick insertion is achieved through the conical guide structure and elastic self-locking design.

Description

Technical Field

[0001] This utility model relates to the technical field of precast piles, and in particular to a precast pile assembly with a quick connection structure. Background Technology

[0002] Precast piles, with their significant advantages such as high construction efficiency and good quality stability brought about by factory production, have become a widely used type of pile foundation in modern foundation engineering. However, in actual construction, there are still many technical bottlenecks in the on-site connection of precast pile segments, which restricts the further improvement of their overall benefits. Currently, the connection methods commonly used in the industry mainly include welding connection, flange bolt connection, and grouting sleeve connection. These traditional methods all have obvious defects: 1. Welding connections rely on high-temperature operations on site, which not only has a long construction period and high energy consumption, but is also significantly affected by external factors such as environmental humidity and wind. It is very easy for hidden quality defects such as incomplete welding and slag inclusion to occur due to unstable operating conditions, which seriously threatens the structural integrity of the pile. 2. Although flange bolt connection can achieve mechanical assembly, it has extremely high requirements for the processing accuracy of the pile end face and the on-site alignment. The positioning needs to be repeatedly adjusted during construction, and the operation process is cumbersome and time-consuming. It is especially difficult to implement in deep foundation pits or narrow working areas. 3. Although grouting can ensure good mechanical continuity, it must go through the waiting period of grouting, curing and strength development. The grout solidification time usually takes 24-72 hours, which greatly delays the progress of key construction nodes and limits its application in tight schedules or low temperature environments.

[0003] The shortcomings of the above-mentioned connection methods in terms of reliability, construction efficiency, and environmental adaptability have become the core pain points restricting the promotion of precast pile technology. There is an urgent need to develop a new connection technology that is efficient, reliable, and not restricted by construction conditions. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a precast pile assembly with a quick-connect structure. This precast pile assembly consists of an upper pile body and a lower pile body, which cooperate with each other to form a self-locking structure, thereby achieving quick connection of the precast pile assembly.

[0005] The objective of this utility model is achieved through the following technical solution: A precast pile assembly with a quick-connect structure includes an upper pile body and a lower pile body. The lower end of the upper pile body is provided with a conical boss, and the conical boss has at least one annular groove along its axial direction. The upper end of the lower pile body is provided with a conical groove that mates with the conical boss. The conical groove has at least one set of elastic fasteners along its axial direction. The number and position of the elastic fasteners correspond to the number and position of the annular grooves, respectively. Each set of elastic fasteners includes several elastic fasteners arranged circumferentially along the conical groove. The elastic fasteners are bent spring steel sheets. When not compressed, the spring steel sheets protrude towards the inside of the conical groove. When compressed, the spring steel sheets are compressed and embedded in the annular groove to achieve self-locking.

[0006] The conical boss is provided with at least one rubber sealing ring along its axial direction.

[0007] The upper pile body has a first guide steel bar embedded in it, with the upper end of the first guide steel bar located inside the upper pile body and the lower end extending outside the upper pile body. The lower pile body has a second guide steel bar embedded in it, with the upper end of the second guide steel bar extending outside the lower pile body and the lower end located inside the lower pile body. The lower end of the upper pile body has a first guide hole that cooperates with the second guide steel bar, and the upper end of the lower pile body has a second guide hole that cooperates with the first guide steel bar.

[0008] The upper pile body has a first grouting hole on its side that is connected to the first guide hole, and the lower pile body has a second grouting hole on its side that is connected to the second guide hole.

[0009] The advantages of this utility model are: 1. Through the conical guide structure and elastic self-locking design, rapid insertion is achieved, improving construction efficiency by more than 50%; 2. Rubber sealing rings prevent groundwater seepage and improve durability; 3. The guide steel bars and epoxy resin grouting form a double reinforcement to ensure the connection strength. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the precast pile assembly of this utility model in its unassembled state; Figure 2 This is a schematic diagram of the structure of the upper pile body of this utility model; Figure 3 This is a schematic diagram of the structure of the lower pile body of this utility model; like Figures 1-3 As shown in the figure, the markings represent: Upper pile body 10, conical boss 101, annular groove 1011, rubber sealing ring 1012, first guide steel bar 102, first guide hole 103, first grouting hole 104, lower pile body 20, conical groove 201, elastic fastener 2011, second guide steel bar 202, second guide hole 203, second grouting hole 204. Detailed Implementation

[0011] The features of this utility model and other related features will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art: Example: Figures 1-3 As shown, this embodiment relates to a precast pile assembly with a quick-connect structure. The precast pile assembly mainly includes an upper pile body 10 and a lower pile body 20. A conical boss 101 is provided at the center of the lower end of the upper pile body 10. The conical boss 101 has at least one (one in this embodiment) annular groove 1011 along its axial direction. A conical groove 201 that cooperates with the conical boss 101 is provided at the center of the upper end of the lower pile body 20. The conical groove 201 has at least one set (one set in this embodiment) of elastic fasteners 201 along its axial direction. 1. The number and position of the elastic fasteners 2011 correspond to the number and position of the annular grooves 1011. Each set of elastic fasteners 2011 includes several (4 to 6 in this embodiment) elastic fasteners 2011 arranged circumferentially along the conical groove 1011. The elastic fasteners 2011 are bent spring steel sheets. When the spring steel sheets are not compressed, they bulge towards the inside of the conical groove 201. When the spring steel sheets are compressed, they are compressed and embedded in the annular groove 1011 to achieve self-locking.

[0012] like Figures 1-3As shown, the conical boss 101 is provided with at least one (two in this embodiment) rubber sealing ring 1012 along its axial direction for sealing to prevent groundwater seepage. A first guide steel bar 102 is pre-embedded in the upper pile body 10. The upper end of the first guide steel bar 102 is located inside the upper pile body 10, and the lower end extends outside the upper pile body 10. At least one set of first guide steel bars 102 is provided, and each set includes multiple first guide steel bars 102 arranged circumferentially along the upper pile body 10. A second guide steel bar 202 is pre-embedded in the lower pile body 20. The upper end of the second guide steel bar 202 extends outside the lower pile body 20, and the lower end is located inside the lower pile body 20. At least one set of second guide steel bars 202 is provided, and each set includes multiple second guide steel bars 202 arranged circumferentially along the lower pile body 20. The lower end of the upper pile body 10 has an opening... A first guide hole 103 that cooperates with the second guide steel bar 202 is provided. At least one set of the first guide holes 103 is provided. Each set of the first guide holes 103 includes multiple first guide holes 103 arranged along the circumference of the upper pile body 10. A second guide hole 203 that cooperates with the first guide steel bar 102 is provided at the upper end of the lower pile body 20. At least one set of the second guide holes 203 is provided. Each set of the second guide holes 203 includes multiple second guide holes 203 arranged along the circumference of the lower pile body 20. A first grouting hole 104 that communicates with the first guide hole 103 is provided on the side of the upper pile body 10. A second grouting hole 204 that communicates with the second guide hole 203 is provided on the side of the lower pile body 20. The fit between the first guide steel bar 102 of the upper pile body 10 and the second guide hole 203 of the lower pile body 20, as well as the fit between the second guide steel bar 202 of the lower pile body 20 and the first guide hole 103 of the upper pile body 10, plus the injection of epoxy resin into the first grouting hole 104 and the second grouting hole 204 to fill the gap between the guide steel bar and the guide hole, makes the upper pile body 10 and the lower pile body 20 connected as a whole, ensuring the connection strength.

[0013] like Figure 1 As shown in the figure, this embodiment also includes the following construction methods: 1. Precast pile fabrication: The upper pile body 10 and the lower pile body 20 are precast in the factory, and guide steel bars (first guide steel bar 102 and second guide steel bar 202) are pre-embedded and grouting holes (first grouting hole 104 and second grouting hole 204) are reserved.

[0014] 2. Construction Connection: After the lower pile body 20 is hoisted into place, the conical protrusion 101 of the upper pile body 10 is vertically inserted into the conical groove 201 of the lower pile body 20. The elastic fastener 2011 automatically snaps into the annular groove 1011, and the guide steel bar cooperates with the guide hole.

[0015] 3. Reinforcement treatment: Inject epoxy resin through the grouting holes (first grouting hole 104 and second grouting hole 204) to fill the gap between the guide steel bars (first guide steel bars 102 and second guide steel bars 202) and the guide holes (first guide holes 103 and second guide holes 203). It can bear the load after 24 hours.

[0016] The beneficial technical effects of this embodiment are as follows: 1. Through the conical guide structure and elastic self-locking design, rapid insertion is achieved, improving construction efficiency by more than 50%; 2. Rubber sealing rings prevent groundwater seepage and improve durability; 3. The guide steel bars and epoxy resin grouting form a double reinforcement to ensure the connection strength.

[0017] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A precast pile assembly with a quick-connect structure, characterized in that... The precast pile assembly includes an upper pile body and a lower pile body. The lower end of the upper pile body is provided with a conical boss, and the conical boss has at least one annular groove along its axial direction. The upper end of the lower pile body is provided with a conical groove that cooperates with the conical boss. The conical groove has at least one set of elastic fasteners along its axial direction. The number and position of the elastic fasteners correspond to the number and position of the annular grooves, respectively. Each set of elastic fasteners includes several elastic fasteners arranged circumferentially along the conical groove. The elastic fasteners are bent spring steel sheets. When not compressed, the spring steel sheets protrude towards the inside of the conical groove. When compressed, the spring steel sheets are compressed and embedded in the annular groove to achieve self-locking.

2. A precast pile assembly with a quick-connect structure as described in claim 1, characterized in that... The conical boss is provided with at least one rubber sealing ring along its axial direction.

3. A precast pile assembly with a quick-connect structure as described in claim 1, characterized in that... The upper pile body has a first guide steel bar embedded in it, with the upper end of the first guide steel bar located inside the upper pile body and the lower end extending outside the upper pile body. The lower pile body has a second guide steel bar embedded in it, with the upper end of the second guide steel bar extending outside the lower pile body and the lower end located inside the lower pile body. The lower end of the upper pile body has a first guide hole that cooperates with the second guide steel bar, and the upper end of the lower pile body has a second guide hole that cooperates with the first guide steel bar.

4. A precast pile assembly having a quick connection arrangement as claimed in claim 3 wherein The upper pile body has a first grouting hole on its side that is connected to the first guide hole, and the lower pile body has a second grouting hole on its side that is connected to the second guide hole.

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