JPS5851244Y2 - Reinforced cage that connects piles and foundation - Google Patents

Description

[Detailed description of the invention] Purpose of the invention The invention relates to a reinforcing cage for connecting concrete or steel pipe piles buried underground and the foundation of a structure. and the basics,
To provide a reinforcing bar cage that can be quickly and easily connected and that can cope with deformation and dimensional errors in pile inner holes.

Prior Art A technique similar to the present invention is described in Japanese Utility Model Publication No. 4810967.

The method described in this publication is made by making many cuts around the circumference of a plate larger than the inner diameter cross section of the pile and bending the cut parts into a bowl shape.
Furthermore, a pressed convex part is formed on the bottom of the board, and a foot with a claw that hangs on the pile cap is attached to the convex part to form a concrete support.

As mentioned above, the conventional method is to block the pile so that the concrete does not flow into the pile when pouring concrete for the foundation, and is not to firmly connect the pile and the foundation. In this conventional method, the pile and the foundation are not firmly connected.

Since the piles are only connected to the concrete of the foundation in the area surrounded by the foundation, and are not connected to the reinforcing bars of the foundation at all, it is not possible to expect an increase in resistance to uneven settlement or earthquakes.

Another known example is the one described in Japanese Utility Model Publication No. 11847/1983.

In the method described in this publication, the base ends of the reinforcing bars are arranged around the outer periphery of the lid, which has a smaller diameter than the inside diameter of the pile, and the base ends are bent vertically inward on the bottom surface of the lid, and are integrally welded to the lid. This is a reinforcing material for steel pipe piles.

As mentioned above, although the conventional method has the effect of improving strength by joining the pile and the foundation, it has low work efficiency because the reinforcing bars and the pile cap must be welded.

In addition, since the reinforcing bars are arranged around the outer periphery of the lid, there is a gap at least corresponding to the thickness of the reinforcing bars between the inner circumferential surface of the inner hole of the pile and the outer periphery of the lid when inserted into the pile. formed,
There is a drawback that the concrete filled above the lid leaks from the gap to the lower part of the pile, and the concrete filled inside the pile cannot be finished densely.

Furthermore, steel pipe piles have inner holes that are perfectly circular and have high dimensional accuracy, making it easy to insert the reinforcing material, but concrete piles are often not perfectly round due to slag adhering to the inner surface, etc. The dimensional accuracy is also low.

Therefore, it is not easy to insert the reinforcing material, and it may become impossible to insert the reinforcing material.

Structure of the invention The basic structure of the invention is that the cylindrical reinforcing bar body is formed to have a smaller diameter than the inner hole of a concrete pile or steel pipe pile, and is inserted into the inner hole. The lower end of the saucer suspension rod has a saucer suspension rod that protrudes downward from the center of the lower end of the reinforcing bar body, and the saucer has an outer peripheral portion that elastically comes into close contact with the inner peripheral surface of the inner hole. It is detachably attached to the

When the reinforcing bar is inserted into the inner hole of the pile, the outer periphery of the tray elastically deforms and comes into close contact with the inner circumferential surface of the inner hole, and the hanging rod hooks on the pile head to prevent the reinforcing bar from falling. .

Next, when the inner hole is filled with concrete, the reinforcing bars and the pile are fixed and integrated.

A strong foundation in which the pile and the foundation are integrated is provided by connecting the reinforcing bar section that protrudes upward from the pile with the reinforcing steel that constitutes the foundation.

Hereinafter, embodiments of the present invention will be described based on the drawings.

In Figures 1 to 4, a large number of reinforcing bars 1 are arranged on the circumference in parallel to the longitudinal direction, and a tie bar 2 is wound around the outside of the reinforcing bars 1 in a spiral or ring shape and welded. form 3.

The outer diameter of this reinforcement body 3 is smaller than the inner hole 5 of the concrete pile or steel pipe pile 4.

In the figure, the reinforcing bar 1 exposed from the pile 4 has tie bars 2.
is not wrapped, but it may be wrapped.

An L-shaped suspension rod 6 is welded to a required position of the reinforcing bar 1, with one end protruding outward so as to be hooked on the pile cap 4a.

A horizontal rod 7 is installed and welded between two reinforcing bars 1 at the lower end of the reinforcing bar main body 3, and a saucer suspension rod 8 is welded to the center of the horizontal rod 7 in the vertical direction.

A flat saucer 9 made of a deformable material such as paperboard, a synthetic resin plate, or a thin metal plate whose surface is coated with paraffin or synthetic resin paint to make it waterproof is attached to the inner hole 5 of the stake 4. A large number of cuts 10 are provided radially on the outer circumference of the saucer 9, and a through hole 11 is provided in the center.

A through hole 13 is provided in the center of a bottom plate 12 made of steel plate or synthetic resin, which has a smaller diameter than the inner hole 5 of the pile 4, and after the saucer 9 is attached to the saucer suspension rod 8, the bottom plate 12 is attached to the saucer suspension rod 8. Then, a nut 14 is screwed onto the saucer hanging rod 8 to prevent the saucer 9 and the bottom plate 12 from falling off.

The saucer 9 may be adhered to the upper surface of the bottom plate 12, or the saucer 9 and the bottom plate 12 may be integrally molded from synthetic resin.

In the present invention, as described above, the saucer 9 is inserted through the saucer suspension rod 8, and the nut 14 is screwed onto the saucer suspension rod 8 to prevent the saucer 9 from falling off, and the saucer 9 can be replaced.

To construct a foundation using the reinforcing bars of the present invention, insert the reinforcing bar body 3 into the inner hole 5 of the pile 4 buried underground in advance with the saucer 9 facing downward, as shown in Figure 2. Insert the hanging rod 6 into the pile cap 4.
a to prevent the reinforcement body 3 from falling off.

When inserting the reinforcing bar body 3, the saucer 9 cannot be inserted into the inner hole 5 if it remains flat because it has a larger diameter than the inner hole 5, but the saucer 5 is made of a material such as paperboard, a synthetic resin plate, or a thin metal plate. Since cuts 10 are provided radially on the outer periphery, the grooves are inclined and partially overlapped, deforming into a dish shape, and are inserted into the inner hole 5.

The outer periphery of the saucer 9 deformed into a dish shape elastically comes into close contact with the inner periphery of the pile 4.

In general, the inner hole 5 is often not a perfect circle due to the adhesion of slag, etc., but the saucer 9 deforms to follow the shape of the inner hole 5, and the outer peripheral portion comes into close contact with the inner peripheral surface of the pile 4.

If the inner diameter has become significantly smaller due to the adhesion of slag, the saucer 9 can be replaced with one with a smaller diameter.

In this state, concrete is poured into the inner hole 5 and hardened to firmly fix the reinforcing bar body 3 and the pile 4.

Since the saucer 9 is provided with a cut 10 on the outer periphery, a part of the concrete water passes through the cut 10 and goes around downward.
It adheres to the bottom plate 12 and dries to prevent corrosion of the bottom plate 12.

After the concrete poured into the inner hole 5 hardens, the pile cap 4
The reinforcing bars 1 exposed from a are connected to the reinforcing bars constituting the foundation, and concrete is poured into the formwork constituting the foundation to construct a strong foundation in which the piles 4 and the foundation are integrally connected.

In the above embodiment, the reinforcing bars 1 are perpendicular to the reinforcing bars 1 and welded to the hanging rods 6, but it goes without saying that the hanging rods may be formed by bending some of the reinforcing bars 1 outward. be.

In addition, the reinforcing bar body 3 is the reinforcing bar 1 (vertical bar) shown in the above embodiment.
In addition to the one in which the tie bars 2 are wrapped around and welded, the reinforcing bar main body may have a structure in which vertical bars and horizontal bars are assembled in a lattice shape (net shape) and wound in a cylindrical shape.

Effect of invention Since the present invention has the above configuration, it has the following advantages.

(1) Since it is only necessary to insert the reinforcing bar cage body into the pile together with the saucer and hook the suspension rod to the pile head, there is no need to attach the reinforcing bar cage body to the pile, and work efficiency is improved.

(2) The outer periphery of the saucer is closely closed to the inner periphery of the pile,
Since the concrete filled into the pile does not fall to the bottom of the receiving tray, a solid and dense filling concrete is formed inside the pile.

(3) The reinforcing bar cage body is formed to have a smaller diameter than the pile inner hole, and the saucer is not fixed to the saucer hanging rod by welding or the like and can be replaced, so the pile inner hole becomes perfectly round due to the adhesion of Toro, etc. Even if a rebar cage is not formed or the inner diameter is too small to insert a rebar cage, it is possible to use a reinforcing bar cage by replacing the rebar cage with a smaller diameter rebar cage.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the present invention - an embodiment, Fig. 2 is a sectional view showing the state of use, Fig. 3 is a plan view, and Fig. 4 is taken along the line X-X in Fig. 2.
It is a sectional view taken along the line. Explanation of symbols of main parts 3... Rebar cage body, 4
...Pile, 5...Inner hole, 6...
Hanging rod, 8... saucer hanging rod, 9... saucer.

Claims (1)

[Scope of utility model registration request] The cylindrical reinforcing bar cage main body 3 is formed to have a smaller diameter than the inner hole 5 of the pile and is inserted into the inner hole 5. The reinforcing bar cage main body 3 has a suspension rod 6 protruding toward the outer circumferential direction approximately in the middle in the longitudinal direction. A saucer suspension 9 has a saucer suspension rod 8 projecting downward at the center of the lower end thereof, and a saucer 9 having an outer circumferential portion elastically in close contact with the inner peripheral surface of the inner hole 5 is removably attached to the lower end of the saucer suspension rod 8. A reinforcing cage that connects the piles and the foundation.