JPH11229400A - Structure foundation reinforced by pipe-shaped pile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure foundation which increases the bearing power of soil by use of waste pipe for a building scaffold, so that construction is easy and so that costs can be reduced. SOLUTION: This foundation comprises a small-diameter pipe-shaped pile 1, which is driven into the bottom of a hole formed by drilling a predetermined portion of subsoil A, and a concrete construction part E placed in such a way as to fill a hole including at least a portion located within a hole in the small diameter pipe-shaped pile 1 and also to project from the surface of the subsoil A. A plurality of through holes are formed near one end of the pile 1, and cement milk is injected into the subsoil A from the through holes. The small diameter rod-shaped pile 1 is in the form of a pipe, and a plurality of cuts are formed at the end of the pile 1. One end of the pile is opened via the cuts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a foundation structure for a building, and more particularly to a foundation structure having a simple and inexpensive reinforcing means for stably and strongly reinforcing its foundation ground.

[0002]

2. Description of the Related Art As a conventional foundation for a structure, for example, a cloth foundation and a solid foundation are well known, and these foundations for a construction are constructed as follows. That is, in FIG.
Describing the construction of the conventional cloth foundation, first, a slot B is excavated and formed in a predetermined portion of the ground A, and the bottom of the slot B is laid with C or the like, and the upper portion thereof corresponds to so-called discarded concrete. Concrete D is poured and solidified, and then a convex concrete foundation E is placed on the concrete D.
Is formed.

[0003] Referring to FIGS. 8 and 9, the construction of a conventional foundation in which a solid foundation is provided with reinforcing piles will be described. First, as shown in FIG. After drilling and forming a hole B having a large diameter by using an earth auger and the like, a predetermined number of holes F having a large diameter are formed by excavation, and the supporting pile having a large diameter is formed through a large-sized working machine.
It is formed by casting concrete inside. Alternatively, the supporting pile G is directly driven by a large-sized pile driving machine using a ready-made concrete pile or the like. Then this support pile G
After installation, the base streaks 2 are stretched after laying a stone C or the like C at the bottom of the face hole B as shown in FIG. 9 and the concrete D is solidified and formed by driving concrete D to the upper end of the face hole B. It is.

[0004]

However, in the above-mentioned conventional cloth foundation, the foundation itself is simply placed on the ground A and is vulnerable to vibrations caused by an earthquake or the like. In some cases, the required strength or ground strength was not obtained. Also, when reinforcing with piles,
It is necessary to determine the required degree of reinforcement by separately measuring the strength of the original ground, or to reinforce the ground strength by placing a large-diameter concrete pile etc. there were. On the other hand, in the conventional solid foundation, a large-sized work machine is used because the large-diameter support pile G is adopted, and not only the cost is high but also the construction site, workability, etc. are restricted. It was not suitable as a low-rise residential foundation.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and provides a foundation for a structure that is simple in construction and reduces cost. Can determine the required spacing of fine piles,
Waste materials such as pipes for construction scaffolds can be used as reinforcing piles,
It is intended to provide a structure of a simple reinforcement foundation which is useful from the viewpoint of waste disposal. Further, the present invention provides a means for applying cement milk to such pipe waste for construction scaffolds to enhance the ground bearing capacity.

[0006]

The present invention employs the following specific technical means in order to solve the above-mentioned problems. First, a small-diameter pipe-shaped pile planted at the bottom of a hole formed by excavating a predetermined portion of the ground, and the hole including at least a portion of the small-diameter pipe-shaped pile located in the hole is buried. And a concrete foundation which is driven into the ground surface so as to protrude therefrom. Further, a plurality of through holes are formed in the vicinity of the end of the small-diameter pipe-shaped pile, and cement milk is injected and solidified from the through-hole into the ground. The distal end was expanded through the cut.

[0007]

1 to 6 show an embodiment of the present invention.
This will be described below. First, the strengthened cloth foundation of the embodiment shown in FIGS. 1 to 3 will be described. FIG. 1 is a part of an embodiment relating to installation of a pile 1 of a foundation for a building according to the present invention,
FIG. 2 shows a part of an embodiment in which after the pile 1 is installed, the fabric foundation formwork 5 is fixed and the foundation structure concrete E is driven. FIG. 3 shows the concrete E that has been cast.
FIG. 2 is a view showing a cross section of the cloth foundation according to the present invention, which is completed by solidification.

As shown in FIG. 1, a slot B is formed by excavating a predetermined portion of the ground A with a small excavator or the like when it is used for foundation construction in a conventional general house construction. Next, the desired small-diameter pipe-shaped pile 1 is driven upright with the tip of the pile 1 positioned near the center of the slot B and hammered or the like (see arrow F in the figure), or Hold and press fit into a small backhoe. It is also possible to push in while applying a rotational force by any other method (see arrow R in the figure). At this time, the original ground bearing capacity of the ground is estimated from the driving resistance of a hammer or a backhoe, and the number of necessary piles is appropriately selected. And it installs in the state which the upper end of the pipe-shaped pile 1 protrudes in the slot B (position of the dotted line).

[0009] For the pipe-shaped pile used at this time, it is most useful to use waste material of an iron pipe used for a general construction scaffold. In this case, the pipe has a diameter of, for example, 5 cm and a length of About 5.5 m is used. On average, it is appropriate to drive or press-fit the pipe piles at intervals of about 1 m. About 5.5 m of the scaffold pipe, which is the above-mentioned waste material, is applied to the ground slightly weaker than usual. By laying at intervals, the ground strength can be increased 2 to 5 times, but it is better to determine an arbitrary number at the construction site according to the strength of the ground as described above.

In order to drive concrete based on the pipe-shaped pile 1 installed in this manner, as shown in FIG. Then, the base bar 2 is fixed to the vicinity of the upper end of the pipe-shaped stake 1 by a fastener 3 such as a wire. Next, the mold 5 is set in the basic fabric shape, and the stirrup 4 is stretched in the mold 5. The formwork 5 is installed with its upper part open, and concrete E is driven from the opened upper part.

After the concrete E thus set is solidified, the form 5 is removed, and a convex cloth foundation structure as shown in FIG. 3 is constructed. The convex cloth foundation has a small-diameter pipe-shaped pile in which the concrete portion E has a protruding portion on the surface of the ground A and a portion immersed in the slot B of the ground A, and is fixed to the ground A. It is possible to achieve extremely strong earth bearing capacity. When a base H for wooden construction is laid at the upper end of the cloth foundation shown in FIG. 3, for example, pipe-shaped piles 1 are planted along the slots B at intervals of, for example, 1 m. Then, the base bar 2 and the stud bar 4 are fixed, and concrete E is driven in to construct a long cloth foundation.

Another embodiment of the present invention will be described with reference to FIG. The illustrated individual pipe-shaped piles 1 are implanted so as to be scattered in a desired area by simple means as described with reference to FIGS. Next, the base bars 2 are wound around each other in the vicinity of the upper end of each pipe-shaped pile 1, and then fixed with appropriate fastening tools 3.
Thereafter, the periphery of the fixed area of these pipe-shaped piles 1 is surrounded by a formwork, and concrete E is driven and solidified to complete the solid foundation construction. In this case, the solid foundation can be freely constructed as in the conventional example in the recessed area previously excavated on the ground surface.

Even in such a solid foundation structure, the pipe-shaped piles 1 can be cast in front, rear, left and right, for example, at intervals of 1 m. In addition, it is extremely inexpensive and rational to use waste materials of iron pipes for construction scaffolds as the pipe-shaped pile 1 as described above. In any of the above embodiments of the present invention, the material of the pipe-shaped pile is not particularly limited, and the pile driving density can be arbitrarily selected according to the softness of the ground.

FIG. 5 shows a pipe-shaped pile 11 specially processed from the pipe-shaped pile 1 employed in the construction of the cloth foundation shown in FIGS.
The installation of the pipe-shaped pile 11 firstly forms a slot B by excavation at a predetermined portion of the ground A, and then has a small diameter. This is performed by driving the pipe-shaped pile 11 or press-fitting it by rotation or pressing.

After the installation of the pipe-shaped pile 11, cement milk 14 sent out by a separate compressor is introduced from the pipeline 13 at the upper end of the pipe-shaped pile 11, and a plurality of cement milks provided near the tip of the pipe-shaped pile 11 are provided. Discharged from the through holes 12, 12, the ground area K near the tip of the pipe-shaped pile 11
(Dotted line) to solidify. The ground area K in which the cement milk 14 is mixed is a concrete lump which has a strong supporting force for the pipe-shaped pile 11 fixed to the ground A, and particularly, constructs a foundation on soft ground. It is effective for The shape of the cement milk discharge hole 12 provided in the pipe-shaped stake 11 is particularly suitable when the pipe is partially cut or drilled at an oblique lower part as shown in FIGS.

FIG. 6 also shows the outer shape of the pile 11 in which a plurality of cuts 15 are formed at the distal end of the pipe pile 11 employed in the foundation construction of FIG. 5. When it is driven or pressed into a slot formed at a predetermined portion of the ground, its tip is cut 15,
The expansion is performed at 15, so that the supporting force of the pipe-shaped pile 11 in the ground can be dramatically increased. Further, the tip of the pipe can be reliably supported by the cement milk discharged from the tip of the expanded pipe pile 11, so that a further effect is exhibited particularly in foundation construction on soft ground.

[0017]

As described above, the foundation for a structure reinforced by the pipe-shaped pile of the present invention is constructed by applying a small-diameter pipe as the support pile, so that the handling of the support pile when constructing the foundation is required. Extremely simple and small-diameter pipes, such as scaffold pipes that have been scrapped, can also be used, making them easy to procure and extremely inexpensive. It is extremely reasonable to be able to change and determine the casting density. Furthermore, since there is no need to introduce a large-sized work machine, the work site is not affected at all by the width and width of the work site, and workability is improved and cost is greatly reduced. Excellent effects can be achieved, such as being applicable to any type of soil, such as a construction object and the ground to be constructed. Also, simply by injecting a cement milk by drilling a hole in the pipe, it is possible to construct a concrete lump of any size required below the support pile, and it is possible to obtain an extremely large earth bearing capacity. It is possible to dramatically increase the strength of the concrete foundation.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a part of an embodiment according to a pile installation of a building foundation according to the present invention.

FIG. 2 is an explanatory view of an embodiment of the present invention in which a fabric foundation formwork is fixed and concrete is driven in after the pile foundation of the building foundation of FIG. 1 is installed.

FIG. 3 is a cross-sectional view of a cloth foundation of the present invention in which concrete E poured in the foundation construction of FIG. 2 is solidified and completed.

FIG. 4 is an explanatory view showing another embodiment of the present invention in which a pile composed of a pipe-shaped rod is applied to solid foundation construction.

FIG. 5 is a schematic view showing an example of a pile made of a pipe-shaped rod used in the present invention and a cement working state.

FIG. 6 is a view showing another example of the pile according to the present invention, in which a cut is formed at the tip of the pile made of the pipe-shaped rod shown in FIG. 5;

FIG. 7 is a schematic explanatory view showing the structure of a conventional cloth foundation.

FIG. 8 is a schematic explanatory view showing a conventional solid foundation construction process.

9 is a schematic diagram of a solid foundation completed by the conventional construction shown in FIG.

[Explanation of symbols]

Reference Signs List A ground B hole C chestnut stone D abandoned concrete part E convex concrete construction part and concrete for it G large-diameter support pile H base of construction 1,11 pile 2 base bar 3 fastening tool 4 stud bar 5 formwork 12 through hole 13 Pipeline 14 Cement milk 15 Break

Claims (4)

[Claims] 1. A small-diameter pipe-shaped pile planted at the bottom of a hole formed by excavating a predetermined part of the ground, and the hole including at least a portion of the small-diameter pipe-shaped pile located in the hole. And a concrete foundation that is buried in the ground and protruded from the surface of the ground. 2. A foundation for a building according to claim 1, wherein a plurality of through holes are formed in the vicinity of the tip of said small-diameter pipe-shaped pile, and cement milk is injected and solidified from said through holes into the ground. . 3. The pile according to claim 1, wherein the small-diameter pipe-shaped pile has a plurality of cuts at a tip thereof, and the tip is expanded through the cuts. Foundation for structures. 4. The foundation for a building according to claim 1, wherein the small-diameter pipe-shaped pile is a waste material of an iron pipe for a construction scaffold.