JPH0340167B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is designed to facilitate pile burying during pile burying, or to adjust the friction force on the pile circumferential surface after pile burying is completed. At the same time, it relates to concrete piles in which fluid injection pipes suitable for each purpose are embedded in the thick concrete wall of the pile.

[Conventional technology and its problems]

Conventionally, high-pressure jet water was injected from the tip of the pile.
Various pile construction methods have been invented for burying piles without noise or vibration. In addition, several pile burying methods have been implemented in which the outer circumferential surface of the pile is filled with grout at the same time as the pile is buried, thereby restoring or reducing the frictional force on the circumferential surface of the pile. In these pile embedding methods, there are many cases in which a fluid injection pipe for supplying a fluid suitable for each purpose is provided in advance in the inner thick part of the pile. In such a case, the connection between the external fluid supply pipe and the pile internal pipe is provided on either (a) the pile side surface or (b) the joint end plate surface, but (a) (b) Each case has drawbacks as described below. That is, when the connection part is provided on the side surface of the pile, the connection part between the upper pile and the lower pile will protrude from the outer peripheral surface of the pile, and there is a high possibility that it will be damaged due to frictional resistance with the ground when the pile is buried. In addition, if a connection is provided on the joint end plate surface, the pile must be buried with the head of the pile held down by a cap, and the cap must have a complicated structure to prevent the injected fluid from leaking. Hot,
Complex problems had to be solved, such as the connection between the cap's fluid supply port and the pile, and seals to prevent fluid leakage at those points. In addition, it was necessary to accurately connect the injection pipes at the joints between the piles.

The present invention provides a pile that solves the above-mentioned problems in the pile joint portion.

[Means to solve the problem]

The present invention provides a concrete pile in which a fluid injection pipe is embedded in a thick concrete wall, in which a branch pipe is provided in the fluid injection pipe leading to a fluid injection port provided on the outer peripheral surface of the pile near an upper joint end plate. At the same time, a socket for plug fitting is attached to the fluid injection port on the side of the upper joint end plate of the fluid injection pipe, and the fluid injection port on the side of the upper joint end plate is attached to the fluid injection port on the side of the upper joint end plate.
An oval recess provided between the upper opening surface of the plug fitting socket and the upper surface of the upper joint end plate, and slightly elongated in the circumferential direction of the pile with the opening circle of the plug fitting socket as the center. Moreover, this concrete pile is characterized in that a plug-fitting socket is also attached to the fluid inlet on the outer peripheral surface side of the pile.

〔Example〕

Hereinafter, the present invention will be explained in detail with reference to the drawings.

As seen in FIG. 1, in the concrete pile of the present invention, a fluid injection pipe 2 is embedded in a thick wall portion 1 of a concrete pile 1A in a direction parallel to and perpendicular to the axis of the pile. The concrete pile of the present invention has an upper joint end plate 3 for this fluid injection pipe 2.
A socket 4 for plug fitting is provided on the side, and a branch pipe 5 is provided at the main part near the end plate 3.
It has a structure in which it branches to the fluid inlet side on the outer circumferential surface of the pile via a socket 6 for plug fitting.

As such an injection pipe 2, for example, a commercially available 3/8B Tease 5A is used for the branching part, and a socket 6 for fitting a plug on the fluid inlet side on the outer circumferential surface of the pile is used, as well as a socket perpendicular to the Tease 5A. Attach the long nipple 7 in the direction, and install the nipple 9 in the downward direction.
is attached and connected to spiral sheath 8.
The socket 4 for plug fitting on the side of the upper joint end plate 3 shown in FIG. 1 is installed by drilling a hole in the joint end plate 3 and welding or screwing.
It is threaded so that the plug 10 can be fitted therein. In addition, the socket 6 for plug fitting is also connected to the plug 1.
It is threaded so that 0 can be fitted. Threading in this manner has the advantage that the plug 10 can be screwed and there is no fear that the plug 10 will fall off.

In addition to applying the Tease 5A as shown in FIG. 1 as the branch pipe 5, as shown in FIG. It can also be connected to 8 to serve as a fluid injection tube.

FIG. 3 is a diagram showing the state of the fluid inlet on the side of the joint end plate, in which the upper end of the socket 4 of the liquid injection pipe is visible, and the upper opening surface of the socket 4 and the upper surface of the joint end plate 3 are shown. An oval recess 4A, which is centered around the opening circle of the socket 4 and slightly elongated along the circumferential direction of the stake, is provided between the two. By providing this oblong recess 4A, when connecting the upper pile, it is possible to tolerate some deviation in the connection of the fluid inlet without any problem.

Furthermore, as shown in Fig. 4, when connecting pile 1B to the top of pile 1A, when welding the piles together at the outer periphery of the joint end plate (the welded part is indicated by 11), the inner thickness of the concrete If a sealing material 12 is installed on the inner peripheral edge of the joint 1, leakage of liquid from the joint can be prevented.

Next, a procedure for constructing a concrete pile according to the present invention will be explained. In order to bury the concrete pile according to the present invention while jointing the pile, fit the plug 10 into the socket 4 of the fluid inlet on the joint end plate surface of the first pile 1A to close the inlet, and embed it in the concrete 1. An external pipe is fitted into a socket 6 of a fluid injection port which is open on the outer peripheral surface of the pile and which communicates with a branch pipe 5 of the fluid injection pipe that has been inserted into the pile, thereby supplying liquid.

Next, when attaching the upper pile 1B to the top of the pile 1A, connect the socket 6 on the outer peripheral surface of the pile 1A to the plug 10.
After removing the plug 10 of the socket 4 of the fluid inlet on the joint end plate surface of the pile 1A to open the pipeline, the upper pile 1B and the lower pile 1A are welded 11 to form a joint pile. At this time, a sealing material 12 is placed on the inner peripheral edge of the concrete thick wall portion 1 to prevent liquid leakage. Upper pile 1B when connecting this upper pile 1B and lower pile 1A
Even if there is some deviation in the circumferential direction, since the oval recess 4A is provided between the socket 4 and the joint end plate surface, the slight deviation can be tolerated.

〔Effect of the invention〕

Unlike conventional piles with embedded fluid injection pipes, the concrete piles of the present invention do not require the use of complex-structured burial caps for supplying fluid when burying the piles. Since the liquid supply conduit does not protrude from the outer surface of the pile, there is no damage to the joint conduit for fluid supply when burying the pile, and there is no problem with pile burying. Even if the upper pile deviates somewhat in the circumferential direction when connecting the joint with the socket, the oval recess is provided between the socket and the joint end plate surface, so the slight deviation can be tolerated. As described above, the concrete pile of the present invention has excellent workability and is an extremely useful pile.

[Brief explanation of drawings]

Fig. 1 is a partial cross-sectional view of a thick-walled part including a joint end plate of a concrete pile according to the present invention, and Fig. 2 is a similar cross-sectional view showing an application example in which the structure of the branch pipe is changed. . FIG. 3 is a partial plan view of the joint end plate, and FIG. 4 is a schematic partial cross-sectional view showing the jointed end plate. 1A... Concrete pile (lower pile), 1B... Upper pile, 1... Concrete inner thickness, 2... Fluid injection pipe, 3... Joint end plate, 4A... Recess, 4... Plug fitting socket , 5...Branch pipe, 5A...Tease, 6...Plug fitting socket, 10...Plug, 11...Welding, 12...Sealing material.

Claims (1)

[Claims] 1. In a concrete pile with a fluid injection pipe embedded in the thick concrete wall, the fluid injection pipe is provided with a branch pipe leading to a fluid injection port provided on the outer circumferential surface of the pile near the upper joint end plate. , a socket for plug fitting is attached to the fluid injection port on the side of the end plate of the upper joint of the fluid injection pipe, and the fluid injection port on the side of the end plate of the upper joint is connected to the upper opening of the socket for plug fitting. This is an oval recess provided between the surface and the upper surface of the upper joint end plate, and slightly elongated in the circumferential direction of the pile with the opening circle of the socket for plug fitting as the center, and furthermore, the outer peripheral surface of the pile A concrete pile characterized in that a socket for plug fitting is also attached to the side fluid inlet.