JP2001336149A - Taper pile for civil engineering and building work foundation construction, foundation construction equipment therefor, and embedding method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a taper pile for civil engineering and building work foundation construction and foundation construction equipment thereof, and the construction method thereof. SOLUTION: The taper pile is embedded in a hole H for civil engineering and building work foundation construction and it is a floating pile 1 for civil engineering and building work foundation. It is fixedly held by a wedge effect at the intermediate layer G. The hole H has the same shape with the fitting part of the taper pile 1. The hole H is excavated by a rod auger 2 for civil engineering and building work foundation construction having a drilling wing W by which a hole having the same shape to make in the ground foundation can be drilled. Since it is a floating tapered pile, the length can be further shortened and the piling machine becomes inexpensive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to architectural civil engineering, and more particularly to a pile used for foundation work of civil engineering structures such as buildings, a pile driving device for driving the pile, and a pile driving method. In particular, the present invention relates to a floating pile for foundation work of a building, a device for piercing a hole for embedding the floating pile in soil, and a pile driving method.

[0002]

2. Description of the Related Art There are various types of pile driving machines and construction methods. In the old days, a weight (hammer) was suspended by a wire and dropped to strike a pile. This was so inefficient that an engine-type pile driver with a hammer made into a piston was developed. However, this was very noisy, so a drill-type excavator (Nakabori) type piling machine and piling method were developed. Js

[0003]

However, the conventional excavation type pile driver and the pile driving method are difficult to extrude the drilling liquid (peripheral fixing liquid) to the outer periphery of the pile, so that the solidification around the pile is performed. Had problems. Furthermore, since the tip shoe of this pile driving machine is of a type in which earth and sand are drawn into the hollow portion, a problem may similarly arise in solidification around the pile. Then, the invention of JP-A-7-3788 was made.

A further improved invention was filed on May 8, 2000 by the same patent applicant as the present applicant. This is a friction pile, and the pile is not long enough to reach the solid support layer of the ground, but the pile is supported by the intermediate layer, which is the soft ground thereon, by frictional force. In this case, the pile could not be shortened more than a certain length because the pile had a non-tapered body. Therefore,
A floating pile tapered pile was required. That is, it is a floating foundation that utilizes the wedge effect, and the development has been desired so that the pile length can be further reduced and the pile machine is also inexpensive.

[0005]

The tapered pile for civil engineering foundation work, the tapered pile foundation construction device for civil engineering foundation work, and the taper pile burying method for civil engineering foundation work according to the present invention have the above problems. In order to solve the problem, the pile is formed into a tapered shape, and a rod auger is formed in a shape corresponding to the tapered shape. In the present invention, the taper is a shape in which the diameter of the base is large and the diameter of the tip is small, and not only the shape in which the tapered shape is gentle, but also a step is provided from the root to the tip. Includes those that become thinner.

That is, the tapered pile includes the following conditions. First, the pile head is referred to as A (thick panel), and the pile connected to B (thin panel) and C (thin panel) is referred to as a tapered pile. This applies to only the portions A and B or any number of stages from A to C.
As described above, the range of the displacement (change) of the diameters of the portions A and B corresponds to any range in which the diameter becomes smaller from A to B and further to C. The pile types include concrete piles, steel pipe piles, wood piles, cast-in-place piles, and other piles. In addition to these, a pile (only a gentle taper) in which a step is not provided over the entire length (single unit) is also included.

The concrete construction of the taper pile for civil engineering foundation work, the taper pile foundation construction device for civil engineering foundation work, and the taper pile burying method for civil engineering foundation work according to the present invention will be described below in detail. It describes in. First, the configuration of the invention of the tapered pile for civil engineering and foundation work described in claim 1 of the present invention will be described. The present invention is a floating pile for civil engineering foundations, which is buried in a hole for civil engineering foundation works, and is fixed and held by a middle layer which does not reach a support layer of the soil by a wedge effect. It is.

The above-mentioned hole for civil engineering foundation work is a hole having the same shape as that of a portion to be buried with the above-mentioned tapered pile for civil engineering foundation work. Then, the hole is dug by a rod auger for civil engineering foundation work having a drilling wing that allows a hole of the same shape to be dug in the soil base.

Next, a tapered pile for civil engineering foundation work, a tapered pile foundation work device for civil engineering foundation work, and a tapered pile burying method for civil engineering foundation work according to the present invention are described in claim 2. The configuration of the invention of the tapered pile foundation construction device for foundation construction will be described.
The present invention relates to a civil engineering building foundation having a drilling wing capable of digging a hole having the same shape as that of a portion to be embedded with a tapered pile for civil engineering foundation work to be buried in the soil base. It is a rod auger for construction. And the above-mentioned taper pile for civil engineering and foundation work,
A floating pile for civil engineering foundations, which is fixed and held by a wedge effect by an intermediate layer that does not reach a support layer of the soil.

Finally, there is provided a tapered pile for civil engineering foundation work, a tapered pile foundation construction device for civil engineering foundation work, and a tapered pile burying method for civil engineering foundation work according to the present invention. The configuration of the invention of the tapered pile burying method for foundation work will be described. The present invention firstly uses a rod auger for civil engineering and foundation work that has a drilling wing that can dig a hole having the same shape as the shape of the portion to be fitted with the tapered pile for civil engineering and foundation work to be buried. Empty. Then, a tapered pile for civil engineering foundation work of the same shape is buried in the hole. The above-mentioned tapered pile for civil engineering foundation work is a floating pile for civil engineering foundations, and is fixedly held by a wedge effect by an intermediate layer that does not reach the soil support layer.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a tapered pile for civil engineering foundation work, a tapered pile foundation construction device for civil engineering foundation work and a tapered pile burying method for civil engineering foundation work according to the present invention will be described. Form will be described. The present invention is to be buried in a hole for civil engineering foundation work described below. This is a floating pile for a civil engineering foundation, which is fixedly held by an intermediate layer of the soil. The above-mentioned hole for civil engineering and building foundation work has the same shape as the shape of a portion where the tapered pile for civil engineering and building foundation work to be buried is fitted. Then, the hole is dug by a rod auger for civil engineering foundation work having a drilling wing that allows a hole of the same shape to be dug in the soil base.

[0012] The tapered pile embedding method for civil engineering foundation work is based on a civil engineering building foundation having a drilled wing capable of digging a hole having the same shape as the shape of a portion to be fitted with the tapered pile for civil engineering foundation work to be buried. A hole H of the same shape is made in the soil base by a rod auger for construction. Then, a tapered pile for civil engineering foundation work of the same shape is buried in the hole.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A concrete example of a taper pile for civil engineering foundation work, a taper pile foundation construction device for civil engineering foundation work, and a taper pile burying method for civil engineering foundation work according to the present invention will be described. It will be described in detail with reference to the accompanying drawings. FIG. 1 is a front view showing an embodiment of a tapered pile for civil engineering foundation work according to claim 1 of the present invention. FIG.
It is a step. FIG. 1-2 shows another embodiment of the present invention, which has three steps. FIG. 1-3 shows still another embodiment of the present invention, which is a tapered pile having no step. The present invention is a support layer G1 (buried in the following hole H for civil engineering foundation work (see FIG. 3)), which is a floating pile for civil engineering foundation and is a solid layer of soil. (See FIG. 3) is fixedly held by a wedge effect by the intermediate layer G. Therefore, since the pile 1 can be made short, not only the cost can be reduced but also the amount of residual soil discharged can be greatly reduced. Also, since this pile 1 may be a cast-in-place pile,
It may be formed by injecting cement milk into the following hole H described in the second embodiment.

The hole H for civil engineering and foundation work is a hole H having the same shape as the shape of the part to be fitted with the tapered pile 1 for civil engineering and foundation work to be buried. The hole H is dug by the rod auger 2 for foundation work of civil engineering and building having a drilling wing W for digging a hole of the same shape for opening the soil base.

Next, a tapered pile for civil engineering foundation work, a tapered pile foundation construction device for civil engineering foundation work, and a tapered pile burying method for civil engineering foundation work according to the present invention will be described. An embodiment of the invention of a tapered pile foundation construction device for foundation construction will be described. The present invention has a drilling wing W for digging a hole H of the same shape as that of a portion to be buried with a tapered pile 1 for civil engineering and foundation work to be buried in a soil base. Rod auger 2 for civil engineering foundation work. FIG. 2 shows the main part of the rod auger 2 together with the holes H in the middle layer G of the virtual soil. Thus, the drilling wing W is rotated from the driving source 2a through the rotary shaft 2b to dig a predetermined hole.

The above-mentioned tapered pile 1 for civil engineering and building foundation work is a floating pile for civil engineering and building foundation, and is composed of an intermediate layer G which does not reach the support layer G1 (see FIG. 3) which is a solid layer of the soil. It is fixed and held by the wedge effect. FIGS. 2-1, 2-2, and 2-3 correspond to FIGS. 1-1, 1-2, and 1-3 of the pile 1 of the above embodiment, respectively.

Finally, there is provided a tapered pile for civil engineering foundation work, a tapered pile foundation construction device for civil engineering foundation work, and a tapered pile burying method for civil engineering foundation work according to the present invention. An embodiment of the invention of a tapered pile burying method for foundation work will be described. The present invention firstly uses a rod auger 2 for civil engineering foundation work having a drilling wing W having a hole of the same shape as the shape of a portion to which the tapered pile 1 for civil engineering foundation work to be buried is fitted. Drill holes H in the soil base. The tapered pile 1 for civil engineering and foundation work of the same shape is buried in the hole.

This tapered pile 1 for foundation of civil engineering construction is a floating pile for foundation of civil engineering construction, which is fixedly held by a middle layer G which does not reach a support layer G1, which is a solid layer of the soil, by a wedge effect. It is. The above-mentioned tapered pile 1 for civil engineering foundation work is a support pile G1 (FIG. 3) which is a floating pile for civil engineering foundations and is a solid layer of the soil.
(See FIG. 3), and is fixedly held by the wedge effect by the intermediate layer G. In addition, FIGS. 3-1 and 3-2 and 3-3
Fig. 1-1, 1-2 and 1- of the pile 1 of the above embodiment
3 and FIGS. 2-1 and 2 of the rod auger 2 of the above embodiment.
-2 and 2-3 respectively.

The construction of the tapered pile foundation and the pile shape in this pile foundation method are as follows. First of all, the construction methods are a) blow method (including pre-boring) and b)
By the cement milk method by pre-boring. However, it shall be excavated by the rod auger of FIG.
Then, as shown in Fig. 3, the ground G
Was tapered. Of course, this also applies to the cast-in-place pile method. The hole H
Has the same shape as that of the pile 1 at the portion where the pile 1 is inserted, but the diameter of the hole H is approximately 100 mm or more of the pile diameter of the pile 1. And the pile diameter and the hole diameter are L1 = 400φ → 500 mm and L2 = 500φ →
600 mm, and L3 = 600φ → 700 mm.

As described above, consideration from the experiment of the taper pile will be described. The superiority of the tapered pile has been studied for some time, and the actual tapered pile (no-tapered pile; NTP or N.P.
T. It is written. Note that the tapered pile is T.A. P. Or, write T. ) To determine the tendency through model experiments. First, the first experiment was conducted on actual ground. It is shown in FIG. Then, as a second experiment, an experiment was performed on artificial ground. This is shown in FIG. 5 (in the figure, the position of Pr is an estimated value). These are the load (P) (horizontal numerical value) and the settlement amount curve (S) (vertical numerical value). As a result of each implementation, almost the expected results were obtained. Thus, in the first experimental stage, the no-taper pile ratio was 40%, and in the second experimental stage, the no-taper pile ratio was 48%. These are load ratios. Thus, a larger ratio could be seen in the load comparison when the settlement amount was constant.

FIG. 6 shows the arrangement of the piles used in the experiment of the data shown in FIG. FIG. 7 shows the size of each pile and the size of the test pit used in the experiment of the data of FIG. The unit of the numbers in these figures is mm. The symbols ABC in FIG. 7 correspond to those parts in FIG. G. in FIG. L is the artificial ground of the test pit.

Thus, future development will be considered. When actually constructing on-site based on the above experimental results,
On-site experiments are required to determine how economical the actual pile can be. Throughout this experiment, T.I. Since it has been found that a relatively long (30 to 40 m) pile is effective for three piles as P piles, it is economical to design a pile foundation to be implemented on these grounds. It is possible.
In addition, various variations can be considered, so that short piles can be considered.

[0023]

The tapered pile for civil engineering foundation work, the taper pile foundation construction device for civil engineering foundation work, and the taper pile embedding method for civil engineering foundation work according to the present invention are as described above. By solving the above problems, the following tremendous effects have been obtained. That is, it is a tapered pile which is a floating pile, a floating foundation which utilizes a wedge effect, and the pile length can be further reduced, and the pile machine is also inexpensive.

[Brief description of the drawings]

FIG. 1 shows a front view of an embodiment of a tapered pile foundation construction apparatus for civil engineering and foundation work according to the present invention, in which 1 is a two-step type and 2 is a three-step type. The third one has no steps.

FIG. 2 is a front view of a rod auger for cutting a hole into which the one in FIG.
No. 2 has three steps, and No. 3 has no steps.

3 shows a front view of inserting the tapered pile of FIG. 1 into a hole carved by the rod auger of FIG. 2, wherein 1 is a two-step type and 2 is a three-step type. And there is no step three.

FIG. 4 is a data table in which the above-described tapered pile was tested on actual ground.

FIG. 5 is a data table in which the above-described tapered pile was tested on artificial ground.

6 is a plan view showing an arrangement of piles used in the experiment of FIG.

FIG. 7 is an explanatory front partial cross-sectional view showing the dimensions of each pile and the size of a test pit used in the experiment of FIG. 5;

[Explanation of symbols]

 Reference Signs List 1 pile 2 rod auger H hole G intermediate layer G1 support layer W drilling wing

Claims (3)

[Claims] 1. A floating pile for civil engineering foundations, which is buried in a hole for civil engineering foundation works, and is fixed and held by a wedge effect by an intermediate layer which does not reach a support layer of the soil. A tapered pile for civil engineering and foundation work characterized by being composed of: The above-mentioned hole for civil engineering foundation work is a hole of the same shape as the shape of the part where the tapered pile for civil engineering foundation work to be buried is fitted, and has the same shape for opening in the soil foundation. It is excavated by a rod auger for civil engineering and foundation work that has a drilling wing that allows a hole to be dug. 2. A civil engineering building foundation having a drilling wing capable of digging a hole of the same shape as that of a portion to be fitted with a tapered pile for civil engineering foundation work to be buried in the soil base. A tapered pile foundation construction device for civil engineering foundation construction, comprising a rod auger for construction. The above-mentioned taper pile for civil engineering foundation work is a floating pile for civil engineering foundations, and is fixed and held by a wedge effect by an intermediate layer that does not reach the soil support layer. 3. A rod auger for civil engineering and foundation work having a drilling wing capable of digging a hole of the same shape as a portion to be fitted with a tapered pile for civil engineering and foundation work to be buried. And burying a tapered pile for civil engineering foundation work of the same shape in the hole of the tapered pile for civil engineering foundation work. The above-mentioned taper pile for civil engineering foundation work is a floating pile for civil engineering foundations, and is fixed and held by a wedge effect by an intermediate layer that does not reach the soil support layer.