JP2000064272A - Connecting method of existing pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connecting method of an existing pile in which a plurality of existing piles fitted with an inlet pipe can be easily positioned. SOLUTION: In a method in which a plurality of existing piles fitted with an inlet pipe 4 inside are connected to each other, each inlet pipe 4 is fitted to the inside of piles 1A, 1B to be connected so that its end part is not projected from a pile end part, and a double connection pipe in which an inner pipe and an outer pipe are slidable to each other is fitted to an end part of one inlet pipe 4 in a projecting manner. An end part of the other inlet pipe is coaxially positioned to and connected to the projecting part of the double connection pipe to connect the end parts of the piles to be connected to each other.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection method for interconnecting a plurality of ready-made stakes having an injection pipe therein, and particularly to a connection method for the injection pipe. This is a connection method for ready-made piles that are also used for positioning. 2. Description of the Related Art As a method of interconnecting a plurality of prestressed concrete piles having an injection pipe attached thereto, Japanese Utility Model Application Publication No.
No. 063, a guide projecting from the end plate (14) of the lower pile (1C) when lowering the upper pile (1A) to the lower pile (1C) when connecting the prestressed concrete pile. The pin (15) and the large-diameter hole (1
Fine adjustment of the rotation of the upper stake (1A) so that the upper stake (6) coincides with the upper stake (1A) can be used.
a) is inserted into the large-diameter hole (16) of the upper pile (1A), and the end plates (14) are connected via the O-ring packing (R) fitted in the countersunk groove (17) in the large-diameter hole (16). (See FIG. 4). [0003] However, in such a method for connecting a prestressed concrete pile, it is necessary to provide a guide pin separately from the injection pipe, and the structure is complicated and the assembling work becomes complicated. However, there is a problem that the cost increases. Therefore, an object of the present invention is to provide a method for connecting a plurality of ready-made piles to which an injection pipe is attached, in which the plurality of ready-made piles can be easily positioned. [0004] In order to achieve the above object, the present invention provides the following method for connecting a ready-made pile. That is, in a method of interconnecting a plurality of ready-made piles having an injection pipe mounted therein, each injection pipe is mounted inside the pile to be connected so that its end does not protrude from the pile end. At the end of the injection pipe, a double connecting pipe in which the inner pipe and the outer pipe are relatively slidable is protruded and mounted, and the other injection pipe end is coaxially positioned at the protruding portion of the double connecting pipe. A method for connecting ready-made piles, wherein the piles are connected to each other and the ends of the piles to be connected are connected. [0005] Embodiments of the present invention will be described below. FIG. 1 is a longitudinal sectional view showing a connection state of an upper pile, a middle pile, and a lower pile of a ready-made pile of the present invention, FIG. 2 is a detailed view of an injection pipe of the present invention, and FIG. It is an abbreviated perspective view. In the figure, (1) is a high-strength PC pile (Pressure High Conc) whose outer peripheral surface is made of an outer shell steel pipe (1K)
rte pile) or a ready-made pile such as a steel pipe pile.
A), a concrete steel bar (2) of the middle pile (1B) and the lower pile (1C) are each buried with a PC steel rod (3) serving as a shaft and an injection pipe (4) of a bulb forming liquid. In the injection pipe (4), in detail, in the upper pile (1A), an injection slide in which an O-ring (R) is fitted to the inner diameter of the other end of the injection pipe sleeve (5) having an internal thread at one end. One end of the tube (6) is press-fitted, and a male screw is engraved on the outer diameter of the other end of the injection slide tube (6). One end of the engraved short pipe socket (7) is screwed. Further, one end of a long injection conduit (4a) in which male threads are engraved on the outer diameters of both ends is screw-connected to the inner diameter of the other end of the piping socket (7). Further, a slightly short injection tube socket (8) having a female screw engraved on the inner periphery of substantially half of the total length is screwed and connected to the other end of the long injection tube (4a). It constitutes a tube (4). As described above, the injection pipe (4) of the upper pile (1A) includes an injection pipe sleeve (5), an injection slide pipe (6) provided with an O-ring (R), a piping socket (7), The injection pipe (4a) and the injection pipe socket (8) are sequentially connected and connected, and the arrangement and connection structure of the injection pipe (4) of the middle pile (1B) are the same as those of the injection pipe (4) of the upper frame (1A). There is
The injection pipe (4) of the middle pile (1B) is attached to the inner diameter of the distal end of the injection pipe sleeve (5) provided at the distal end of the injection pipe (4).
The injection pipe joint (9) provided with the O-ring (R) is press-fitted, and a part of the injection pipe joint (9) is configured to protrude. The injection pipe joint (9) has an injection slide pipe (6) as an inner pipe and a slide pipe sleeve (5) slidable relative to the slide pipe (6) as an outer pipe. Connection pipe, upper pile (1A)
And a center pile (1B), and a joint having a positioning function when connecting the center pile (1B) and the lower pile (1C). The structure of the lower frame (1C) is similar to that of the upper pile (1A).
The configuration is partially different from the configuration of the middle pile (1B). That is, at a substantially intermediate position of the lower pile (1C), a shift stopper (11) for the geosynthetic bag is provided on the circumference, and further below the lower part, a plurality of adhesion enhancing portions (12) are provided over a plurality of stages. The end portion is provided with a friction cutter (13). The injection pipe (4) of the lower pile (1C) is similar to the upper pile (1A) and the middle pile (1B), and the injection pipe sleeve (5), the injection slide pipe (6), and the pipe socket (7). ) Are sequentially connected and connected, but the difference from the pipe connection with the upper pile (1A) and the middle pile (1B) is that the branch pipe (10) is provided at one end of the pipe socket (7). It is being done. The branch pipe (10) is a pipe for injecting a fabric bulb forming liquid into a geosynthetic bag (not shown), and is formed in a U-shape. In the ready-made pile having the above-mentioned structure, the middle pile (1B) is lifted by a leader or the like, and the injection pipe joint (4) of the injection pipe (4) mounted on the already buried lower pile (1C). The position of 9) is set by eye measurement, and the middle pile (1B) is lowered onto the lower pile (1C). Then, an injection pipe sleeve (5) of the injection pipe (4) attached to the injection pipe joint (9) projecting from the upper end of the lower pile (1C) so as not to protrude from the end of the middle pile (1B). The middle pile (1B) is gradually lowered so that
The injection pipe sleeve (5) of the middle pile (1C) is inserted into the injection pipe joint (9) of C), and the middle pile (1B) and the lower pile (1) are inserted.
C) is interviewed and connected. In the above embodiment, the injection pipe joint (9) protrudes from the upper end of the lower pile (1C). However, the present invention is not limited to this, and the lower end of the middle pile (1B) is not limited thereto. The injection pipe joint (9) may be made to protrude from the portion and fitted to the injection pipe sleeve (5) of the lower pile (1C). As described above, the injection pipe sleeve (5) provided on the middle pile (1B) is set by visual measurement on the injection pipe joint (9) projecting from the end of the lower pile (1C), and the inner pile (1B) is set. )
Since the two piles (1B) and (1C) are connected simply by inserting the injection pipe sleeve (5) attached to the pipe, there is no need to provide a guide pin (15) as in the prior art, and the injection pipe (4) is It has a function for positioning, and in addition to the function of the O-ring (R) fitted into the injection tube sleeve (5), exhibits a sealing function for the connection portion of the injection tube (4). Next, the connection between the upper pile (1A) and the middle pile (1B) was
B) and the lower pile (1C) are connected in the same manner as the connection method, and the upper pile (1A), the middle pile (1B) and the lower pile (1C) complete the connection operation completely. In addition, the said Example is an upper pile (1A),
Although an example of three members consisting of the middle pile (1B) and the lower pile (1C) has been described, the present invention is not limited to this, and at least two members of the upper pile (1A) and the lower pile (1C). Needless to say, this connection can be appropriately implemented. According to the method for connecting a ready-made stake having the above-mentioned structure, according to the first aspect, it is not necessary to provide a guide pin as in the prior art, and the stake end of the injection pipe is provided. The double connecting pipe protruding from the pipe is positioned when connecting the pile and the injection pipe, and has an effect of exerting a sealing function of the connection section of the injection pipe.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view showing a connection state of an upper pile, a middle pile, and a lower pile of a ready-made pile of the present invention. FIG. 2 is a detailed view of an injection pipe of the present invention. 3: Partially omitted perspective view of a ready-made pile [Fig. 4] Explanatory diagram showing a connection state of a conventional prestressed concrete [Description of symbols] 1 Pre-made pile 1A Upper pile 1B Middle pile 1C Lower pile 1K Shell steel pipe 2 Concrete part 3 PC steel rod 4 Injection pipe 4a Injection pipe 5 Injection pipe sleeve 6 Injection slide pipe 7 Piping socket 8 Injection pipe socket 9 Injection pipe joint 10 Branch pipe 11 Detachment of bag body 12 Adhesion enhancing part 13 Friction cutter 14 End plate 15 Guide Pin 15a Guide pin upper end cone 16 Large diameter hole 17 Countersink

Claims (1)

Claims: 1. A method for interconnecting a plurality of ready-made stakes having an injection pipe installed therein, wherein each injection pipe is connected to the inside of the pile to be connected with the end of the injection pipe extending from the end of the pile. Attach it so that it does not protrude, and attach a double connecting pipe that allows the inner pipe and the outer pipe to slide relative to each other at the end of one injection pipe. A method for connecting ready-made piles, wherein pipe ends are coaxially positioned and connected to connect ends of piles to be connected.