JP2545658Y2 - Interlocking pipe - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an interlocking pipe used for constructing an underground wall.

[0002]

2. Description of the Related Art There is known a method in which an interlocking pipe is attached to a wife of a preceding element at the time of constructing a continuous underground wall to prevent collapse of earth and sand in the wife when concrete is poured. This interlocking pipe must be withdrawn before the concrete has completely hardened.

[0003]

[Problems to be Solved by the Invention] The above-mentioned conventional interlocking pipe drawing operation has the following problems. <B> If the hardening of the concrete progresses too much because the drawing time is delayed, it becomes extremely difficult to pull out the interlocking pipe. <B> If the interlocking pipe is long, the adhesion strength of the surrounding concrete increases, and it is difficult to pull out the pipe. <C> In order to cope with such a problem, a method of holding the top of the interlocking pipe with a vibration generator and applying vibration to the pipe to cut off the adhesion to concrete has been adopted. However, even if the vibration is applied by such a method, the vibration is attenuated in the middle and is not transmitted to the tip, so that it is difficult to cut off the adhesion, particularly with a long pipe, and it may be impossible to pull out the pipe.

[0004]

[Purpose of the present invention] The present invention has been made to solve such a conventional problem, and provides an interlocking pipe which can easily be pulled out not only a short pipe but also a long pipe. The purpose is to do.

[0005]

Means for Solving the Problems The present invention relates to an interlocking pipe which is vertically erected at the end of each element in the construction of an underground wall. An interlocking pipe with a vibration generator attached

[0006]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described below with reference to the drawings. <B> Interlocking Pipe The interlocking pipe 1 is a pipe that is vertically erected at the end of each element in the construction of an underground wall.
The length varies depending on the structure of the underground wall.
Long objects such as 0 to 40 meters are the object of the present invention. <B> Vibration generator Since the interlocking pipe 1 is a hollow pipe, the vibration generator 2 is mounted inside. Specifically, a vertical plate 21 is attached so as to cross the interior of the interlocking pipe 1, and the vibration generator 2 is attached to the vertical plate 21.
Attach. The vibration generator 2 is covered with a waterproof cover so that it can be used inside groundwater. At least one of the mounting positions of the vertical plate 21 is arranged near the tip of the interlocking pipe 1 so that the vibration is reliably transmitted to the tip of the interlocking pipe 1. When the number of the vertical plates 21 is two, the mounting direction is set in the x direction and the y direction of the cross section of the pipe 1. Of course, the power cord and the like of each vibration generator 2 is extended from the upper end of the pipe 1 to the outside so that operation from outside is possible.

[0007]

The operation of the interlocking pipe 1 will now be described. Excavation of a groove for a new element is performed adjacent to the front element 3 as in the construction of the conventional continuous basement wall. (FIG. 2) When the excavation is completed, the interlocking pipe 1 is inserted into the bentonite suspension 4 and installed at the end on the wife side of the groove for the new element. (Fig. 3)
Next, the rebar basket 5 is sunk inside, and concrete 6 is cast. (Fig. 4) And concrete 6 of new element 7
When the hardening has progressed to a certain extent and the self-supporting state is attained, the interlocking pipe 1 is pulled out. (Fig. 5)
At this time, particularly when the pipe is long, a phenomenon occurs in which the pipe cannot be pulled out due to the adhesive force with the concrete. At that time, the vibration of the vibration generator 2 provided inside the interlocking pipe 1 of the present invention is started. Then, regardless of the length of the pipe, the vibration can be propagated from the free position where the vibration generator 2 is set, such as the tip or the intermediate position of the interlocking pipe 1, toward the surroundings. Therefore, even in the case of the long pipe 1, the adhesion of the new element 7 to the concrete can be cut over the entire length thereof, and the new element 7 can be easily pulled out.

[0008]

[Effects of the Invention] The present invention is as described above, and the following effects can be obtained. <A> When the vibration is applied from the ground by grasping the upper end of the pipe, the vibration is not transmitted to the tip of the interlocking pipe 1. However, if the vibration generator 2 is mounted near the tip of the interlocking pipe 1 as in the present invention, it is possible to cut the adhesive force at the tip even if the pipe is long,
Long pipes can be pulled out. <B> Since the interlocking pipe 1 is frequently diverted, preparing several pipes can be used at many sites and is economical.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an interlocking pipe 1 of the present invention.

FIG. 2 is an explanatory view of a construction state of a continuous basement wall.

FIG. 3 is an explanatory view of a construction state of a continuous underground wall.

FIG. 4 is an explanatory view of a construction state of a continuous basement wall.

FIG. 5 is an explanatory view of a construction state of a continuous underground wall.

Claims (1)

(57) [Scope of request for utility model registration] 1. A hollow interlocking pipe which is vertically installed at an end of each element in the construction of an underground wall, and a vibration generator is attached to at least a position near a tip inside the interlocking pipe. , Interlocking pipe