JPH089226Y2 - Dual structure hardened soil cement extractor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention is a tool for pulling out hardened soil cement in a concrete pile after a hardening period in a soil cement injection means for placing concrete pile in a construction foundation work.

Conventional technology Conventionally, for placing concrete piles in construction foundation work, in order to eliminate the noise caused by the use of the placing machine, a hole is punched in the ground and soil cement is injected into the hole to remove the concrete pile. The so-called soil cement injection means, which is buried and fixed, has appeared. However, in this case, since the soil cement flows into the inner diameter of the concrete pile and adheres to it, after the soil cement has passed the curing period,
In order to insert the pile head reinforcing bar, the hardened soil cement attached to the inner diameter of the concrete pile had to be peeled off. Therefore, a means to prevent the soil cement from sticking by filling the inner diameter of the concrete pile was considered, but there was no reliable and simple means.

Therefore, the present invention is composed of both the inner pipe and the outer pipe, and has a double structure in which the upper end and the lower end are closed with a lid. Although external pressure is not applied to the inner pipe, when the hardened soil cement is removed from the concrete pile, only the force of cutting off the lower extraction rod is used to remove the hardened soil cement from the concrete pile and the inner pipe and the hardened soil. The cement can also be removed, and as a result, the hardened soil cement is not attached to the inner diameter of the concrete pile, so it is possible to insert the pile head reinforcing bar without the work of peeling the hardened cement as in the past. . Further, the length of the hardened soil cement in the concrete pile can be extracted to a predetermined length according to the length of the present invention, which is a tool for pulling out the hardened soil cement having a double structure.

Means for Solving the Problems A configuration of the present invention for achieving the above object will be described below with reference to the drawings.

The present invention consists of both an inner pipe (1) and an outer pipe (2), the upper and lower ends of which are closed by a lid (3), and a double pipe is provided below the inner pipe (1). This is a hardened soil cement pulling tool having a double structure in which a pulling out rod (4) is attached and a pulling out rod (6) having a hooking portion (5) slightly longer than the main body is connected to the center thereof.
In the drawing, (7) is concrete pile, (8) is soil cement, (9) is ground, (10) is spiral hoop,
(11) is a spiral hoop ring.

Operation Since the present invention is constructed as described above, it has the following operation.

In placing concrete pile 7 for construction foundation work,
In the case of so-called soil cement 8 injecting means for making a hole in the ground 9 with a hole making machine and injecting the soil cement 8 into the hole to embed and fix the concrete pile 7, the pull-out rod 6 of the present invention is grasped. It can be easily installed by simply inserting it into the inner diameter of the concrete pile 7. In addition, the present invention has a double structure in which both the inner pipe 1 and the outer pipe 2 are closed, and the upper and lower ends thereof are closed by the lid 3, so that external pressure is applied to the outer pipe 2 Since no external pressure is applied to the pipe 1, it can be securely fixed in the concrete pile 7,
It does not rise due to the pressure of the soil cement 8. Then, after the soil cement 8 has hardened, the ground 9 around the concrete pile 7 is excavated, hooked on the hook 5 or the pull-out rod 6 is lifted, and is attached below the inner pipe 1 for taking out. At the same time as the extraction rod 4 and the inner pipe 1 and the hardened soil cement 8 and the concrete pile 7 only by the force of cutting the rod 4.
The hardened soil cement 8 is not attached to the inner diameter of the concrete pile 7, so it is possible to insert the pile head reinforcement steel bar without the work of peeling the hardened soil cement 8 as in the past. is there. Further, the length for extracting the hardened soil cement 8 in the concrete pile 7 can be set to a predetermined length according to the length of the present invention.

Embodiments Since the present invention relates to the creation of a technical idea that reasonably achieves the above object for the above purpose, the following is a description of the drawings according to the present invention as an embodiment of the means embodying the present invention. In other words, that is, in which the inner pipe 1 and the outer pipe 2 are both formed, and the upper and lower ends thereof are closed by the lid 3, the take-out rod 4 is provided below the inner pipe 1 in a double pipe. This is a tool for pulling out hardened soil cement 8 having a double structure in which a pulling-out rod 6 with a hooking portion 5 slightly longer than the main body is attached at the center thereof. In implementing the present invention, the size of the main body is determined according to the inner diameter of the concrete pile 7 to be implemented, and the lengths of the extraction rod 4 and the withdrawal rod 6 are further determined by the determined size of the main body. Determine each length between the tube 1 and the outer tube 2. As for the material, paper material, synthetic resin material, MEF material (foamed polyethylene), spiral hoop 10, and other tubular materials may be used, and the inner tube 1 and the outer tube 2 are not limited to the same material. For example, a general paper material for the inner tube 1, a waterproof paper material for the outer tube 2, a mesh material and a waterproof mesh material, and a general spiral hoop 10 as shown in FIG.
It is also possible to use a foreign object such as a spiral hoop with a ring 11.

Effects of the Invention Since the configuration of the present invention is as described above, it has the following effects. According to the present invention, when burying a concrete pile by means of soil cement injection, the present invention is mounted on the inner diameter of the concrete pile, but it can be easily mounted simply by grasping and pulling in a pull-out rod. Also, since it has a double structure consisting of both the inner pipe and the outer pipe, and its upper and lower ends are closed with a lid, external pressure is applied to the outer pipe, but external pressure is applied to the inner pipe. Since it does not exist, it can be securely fixed in the concrete pile, and it does not rise because it is not subjected to the pressure of soil cement. Then, after the soil cement has hardened, if it is hooked on the hook or the extraction rod is lifted, the removal rod attached to the lower part of the inner pipe will not be removed from the inner pipe at the same time as the removal rod. The hardened soil cement can also be removed from the concrete pile, and the hardened soil cement is not attached to the inner diameter of the concrete pile, so there is no need to remove the hardened soil cement as is required in the past. Can be inserted. Furthermore, the length for extracting the hardened soil cement from the concrete pile can be prepared. The material of the present invention is inexpensive, such as paper material and synthetic resin material, and it can be said that it is a very effective and appropriate device that can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of the present invention, FIG. 2 is a vertical sectional view of the present invention implemented, FIG. 3 is a top view, and FIG. 4 is a front view when using a diaphragm material. 1 ... inner tube, 2 ... outer tube, 3 ... lid, 4 ... take-out rod, 5 ... hooking part, 6 ... pull-out rod,
7 ... Concrete pile, 8 ... Soil cement, 9
... ground, 10 ... spiral hoop, 11 ... spiral hoop ring.

Claims (1)

[Scope of utility model registration request] 1. A double tube consisting of both an inner tube (1) and an outer tube (2), the upper and lower ends of which are closed by a lid (3), the inner tube (1) being a double tube. A hardened soil cement pulling tool having a double structure characterized in that a pulling rod (4) is attached to the lower portion, and a pulling rod (6) with a hooking portion (5) slightly longer than the main body is connected to the center thereof.