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KR-102961770-B1 - Modular PHC file

KR102961770B1KR 102961770 B1KR102961770 B1KR 102961770B1KR-102961770-B1

Abstract

The present invention relates to a modular PHC pile, and more specifically, to a modular PHC pile comprising: a pile body having a reinforced concrete structure; a PC nut embedded so as to be exposed on one side of the pile body; and a housing embedded so as to be exposed on the other side of the pile body.

Inventors

  • 강정식
  • 강민수
  • 이용철

Assignees

  • 케이에이치건설 주식회사

Dates

Publication Date
20260513
Application Date
20230821

Claims (10)

  1. A pile body of a reinforced concrete structure; A PC (Prestressed Concrete) nut embedded so as to be exposed on one side of the above-mentioned file body; A housing embedded so as to be exposed on the other side of the above file body; A connector connecting either one of the PC nut and housing of the above-mentioned file body and either one of the PC nut and housing of another file body; and It includes a one-touch wedge connection connector that is screw-coupled inside the above housing, and The above PC nut has an opening of a screw hole that is screw-coupled with a fastening bolt of a molded plate exposed to one side of the pile body, and a stepped portion formed on the edge of the exposed screw hole. The above housing has an opening of a screw hole that is screw-coupled with a fastening bolt of a molded plate exposed to the other side of the pile body, and a stepped portion formed on the edge of the exposed screw hole. The above connector further comprises a bolt head, a first screw thread formed on one side of the bolt head and screwed into a PC nut, and a fitting member formed on the other side of the bolt head and fitted into a one-touch wedge connector in a one-touch wedge manner. The above-described one-touch wedge connection connector has a fitting projection formed thereon that is fitted into a stepped portion of the housing, and a stepped portion formed in a fitting hole to which a fitting coupling member is coupled. Characterized by having fitting projections formed on each side of the bolt head, which are fitted into the stepped portion of the PC nut and the stepped portion of the connector. Modular PHC file.
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  7. A pile body of a reinforced concrete structure; A PC (Prestressed Concrete) nut embedded so as to be exposed on one side of the above-mentioned file body; A housing embedded so as to be exposed on the other side of the above file body; and It includes a connector connecting either one of the PC nut and housing of the above-mentioned file body and either one of the PC nut and housing of another file body, The above PC nut has an opening of a screw hole that is screw-coupled with a fastening bolt of a molded plate exposed to one side of the pile body, and a stepped portion formed on the edge of the exposed screw hole. The above housing has an opening of a screw hole that is screw-coupled with a fastening bolt of a molded plate exposed to the other side of the pile body, and a stepped portion formed on the edge of the exposed screw hole. The above connector comprises a bolt head, a first screw thread formed on one side of the bolt head and screwed into a PC nut, and a second screw thread formed on the other side of the bolt head and screwed into a housing. The first screw thread and the second screw thread are formed such that the rotational direction of the screw threads is symmetrical with respect to the bolt head, and The above bolt head is characterized by comprising: a first bolt head having the first screw thread formed thereon; and a second bolt head having the second screw thread formed thereon and coupled to the first bolt head so as to be rotatable with respect to the first bolt head. Modular PHC file.
  8. A pile body of a reinforced concrete structure; A PC (Prestressed Concrete) nut embedded so as to be exposed on one side of the above-mentioned file body; A housing embedded so as to be exposed on the other side of the above file body; and It includes a connector connecting either one of the PC nut and housing of the above-mentioned file body and either one of the PC nut and housing of another file body, The above PC nut has an opening of a screw hole that is screw-coupled with a fastening bolt of a molded plate exposed to one side of the pile body, and a stepped portion is formed on the edge of the exposed opening of the screw hole. The above housing has an opening of a screw hole that is screw-coupled with a fastening bolt of a molded plate exposed to the other side of the pile body, and a stepped portion is formed at the edge of the exposed opening of the screw hole. The above connector comprises a bolt head, a first screw thread formed on one side of the bolt head and screwed into a PC nut, and a second screw thread formed on the other side of the bolt head and screwed into a housing. The first screw thread and the second screw thread are formed such that the rotational direction of the screw threads is symmetrical with respect to the bolt head, and Characterized by having fitting projections formed on both sides of the bolt head, respectively, which are fitted into the stepped portion of the PC nut and the stepped portion of the housing. Modular PHC file.
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Description

Modular PHC file The present invention relates to a modular PHC pile, and more specifically, to a PHC pile that was manufactured and constructed in four types (single, upper, middle, and lower) depending on the construction depth in the fields of construction or civil engineering, and to unify it into a single type with an integrated structure, thereby enabling construction at various depths using this. In particular, the present invention relates to a modular PHC pile that can be utilized in various ways in various construction methods by enabling connection by bolt fastening as well as connection by one-touch wedge method using a single type of PHC pile. Generally, PHC (Pretensioned spun High strength Concrete) piles are one of the materials used in the construction and civil engineering fields to support loads such as buildings or to reinforce soft ground. PHC piles are one of the piles that are manufactured in a factory, transported to a work site, and then installed. In particular, they are concrete piles (piles) manufactured by applying pretension with a compressive strength of 78.5 MPa or more to the concrete to compensate for the bending and tensile strength of the concrete. These PHC piles were constructed by connecting two or more piles depending on the construction depth, and in this case, welded joints were primarily used. The welded joint method involves connecting two PHC piles by welding them together. During the fabrication process, metal plates are installed on both sides of the PHC piles, and the construction is carried out by welding these metal plates at the work site. However, this welding joint method has the following problems. First, welding is impossible in working environments involving rain or snow, winds exceeding a certain speed, or temperatures below a certain level. Second, the joint quality varies depending on the welder's skill level. Third, the construction period may be delayed due to factors such as delays in welding work. Fourth, depending on the construction method (depth), there is the inconvenience of having to manufacture and manage a total of four types of piles, including one type of single-piece pile that is composed as a whole, and three types of combined piles (top, middle, and bottom) that are combined to form one. In order to solve such problems, the applicant of the present invention previously filed and obtained registration for the following prior art document, Korean Registered Patent No. 10-2273698, 'Modular Pile' (hereinafter referred to as 'Prior Art 1'). Prior Art 1 applies a mechanical joining method, such as a bolt fastening method, to solve the problems of the welding joining method. Prior Art 1 allows joining work to be carried out regardless of the environment of the work site (weather, etc.) and enables construction of the same high quality regardless of the worker's skill level. In addition, the applicant of the present invention has previously filed for and received registration of a one-touch wedge-type joint structure, such as the following prior art document, Korean Registered Patent No. 10-2503767, 'Pipe connection structure and PHC pile structure using the same' (hereinafter referred to as 'Prior Art 2'), in order to improve the efficiency of the work and shorten the construction period. Meanwhile, PHC piles incorporating prior art are manufactured using a method called centrifugal forming. Centrifugal forming is a molding method that utilizes centrifugal force. It involves placing a reinforced structure inside a mold, pouring concrete, and then rotating it to form a tubular shape. In the case of PHC piles, as explained above, pretension is applied by pulling the PC (Prestressed Concrete) steel rods configured inside the pile during centrifugal forming to form sufficient tensile force in the concrete pile. However, during the bolt assembly process for tensioning and the centrifugal forming process, a phenomenon may occur in which the position of at least some of the PC nuts connected to the PC steel rods moves irregularly. PC nuts are used to connect two piles, such as in the following prior art document, Korean Registered Patent No. 10-1958519, "Pile assembled to fit the construction site" (hereinafter referred to as "Prior Art 3"). However, as explained above, if the position of some PC nuts moves irregularly during the bolt assembly process for tensioning and the centrifugal forming process, the joining process cannot proceed smoothly, and even if joined, problems such as the central axis of the two connected piles becoming misaligned occur. In the case of Prior Art 3, assembly can be performed even when the position of the PC nut moves in the circumferential direction, but in the case of centrifugal forming, the centrifugal force is generated outward and the position of the PC nut also moves radially from the center rather than moving along the circumferential direction, so Prior Art 3 does not solve the problem of PC nut position shif