Foundation piles, connecting members used therein, and construction method for foundation piles

Abstract

This invention provides a foundation pile, connecting members, and construction method for a foundation pile that can be constructed using wooden piles and steel pipe piles, by forming the foundation pile during the construction process, so that the wooden piles and steel pipe piles, which are the constituent members, can be transported separately to the site, thereby preventing damage to the foundation pile during transportation and construction. [Solution] The foundation pile A comprises a wooden pile 1 of a predetermined length with a substantially cylindrical shape that tapers towards the bottom, and a pile support 2 that can be connected to the wooden pile 1. The pile support 2 has a steel pipe pile 2 of a predetermined length and a connecting member 21 which has one end connected to the bottom end of the steel pipe pile 20 and the other end provided with a connecting rod 212 that is pressed in or inserted into the connecting surface 10 of the wooden pile 1 to connect it.

Description

Technical Field

[0001] The present invention relates to a foundation pile, a connecting member used therefor, and a construction method of the foundation pile. Specifically, in constructing a foundation pile having a structure in which a wooden pile and a steel pipe pile are connected, the foundation pile is formed in the construction process without specially processing the connecting portion, thereby facilitating fabrication, allowing the wooden pile and the steel pipe pile as constituent members to be transported separately to the site, and preventing the foundation pile from being damaged during transportation and construction.

Background Art

[0002] When constructing buildings or structures on the ground, foundation piles are sometimes used to prevent deformation and settlement of the ground and to support the buildings or structures to enhance durability. The foundation piles can disperse and support the weight of buildings or structures at the deep part of the ground or in the ground.

[0003] A general foundation pile has a structure in which a steel pipe pile that is less prone to corrosion in the water level fluctuation zone or above the groundwater level is connected to a wooden pile that is less prone to corrosion below the groundwater level at the deep part in the ground, and one example thereof is the "connection structure of wooden pile and steel pipe pile" described in Patent Document 1.

[0004] In the conventional foundation pile of Patent Document 1, in order to connect different materials of the wooden pile and the steel pipe pile constituting the foundation pile, a hooking member (vertical plate) is fixed on the steel pipe pile side, hooking cutting processing (slit) is performed on the wooden pile side, and further, both connecting portions are connected by using connecting parts such as bolts.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] Therefore, the effort required to manufacture each individual foundation pile using wooden or steel pipe piles was considerable. Furthermore, there were problems such as the need to further process the wood into cylindrical shapes in order to make the diameters of the wooden and steel pipe piles roughly the same.

[0007] As described above, the foundation piles described in Patent Document 1 were constructed by first connecting wooden piles and steel pipe piles to form a connected structure, which was then driven into the ground and erected to a predetermined depth. As a result, the foundation piles, which were connected using wooden piles and steel pipe piles, were prone to damage such as cracking or bending due to their own weight or insufficient strength during transportation to the site, delivery, or construction.

[0008] The present invention was conceived in view of the above points, and aims to provide a foundation pile, a connecting member used therefor, and a method for constructing a foundation pile, which facilitates the construction of a foundation pile structure using wooden piles and steel pipe piles connected together, by forming the foundation pile during the construction process without special processing of the connecting part, and by enabling the wooden piles and steel pipe piles, which are the constituent members, to be transported to the site separately, thereby preventing damage during transportation and construction. [Means for solving the problem]

[0009] [1] To achieve the above objective, the foundation pile of the present invention comprises a wooden pile of a predetermined length having a substantially cylindrical shape with a tapered lower end, and a pile support that can be connected to the wooden pile, wherein the pile support comprises a steel pipe pile of a predetermined length and a connecting member having one end connected to the bottom end of the steel pipe pile and the other end provided with a connecting rod that is pressed in or inserted from the connecting surface of the wooden pile.

[0010] The wooden pile for foundations according to the present invention, which has a roughly cylindrical shape with a tapered lower end and a predetermined length, reduces resistance when pressed into the ground, making it easier to press it in using a work machine. Furthermore, the foundation pile is formed when a pile support column, which can be connected to the wooden pile, is connected to the wooden pile.

[0011] The connection between the steel pipe pile and the connecting member is typically made by welding or a strong fit, but is not limited to these methods, and other means may be employed.

[0012] Furthermore, one end of the connecting member is connected to the bottom end of the steel pipe pile, and the steel pipe pile and the connecting member are integrated. The other end of the connecting member is provided with a connecting rod that is pressed in or inserted into the connecting surface of the wooden pile, so that the pile support can be connected to the wooden pile by the connecting rod.

[0013] This allows for the construction of foundation piles, which consist of wooden piles and pile supports (made of steel pipe piles and connecting members), by connecting the components during the construction process. Therefore, the wooden piles and pile supports, which are components of the foundation piles, can be transported to the site separately, thus preventing damage to the foundation piles during transportation and construction, as has been the case with conventional methods.

[0014] [2] The foundation pile of the present invention may have a configuration in which a cover that can be attached to the top of the steel pipe pile is provided in the invention of [1].

[0015] In this case, having a cover that can be attached to the top of the steel pipe pile is expected to have the effect of preventing problems that could occur during the construction of foundation piles, such as when filling the space around the steel pipe pile with filling material after it has been pressed into the ground, where wet sand or soil gets trapped inside the steel pipe pile, or when rainwater penetrates before the foundation is constructed, thereby promoting corrosion from the inside over the long term.

[0016] [3] In order to achieve the above objective, the connecting member of the present invention is a connecting member used for a foundation pile of the invention of [1] or [2], comprising: an insert body that can be fitted into the bottom end of the steel pipe pile for connection; and a connecting rod body provided on the insert body that can be pressed in or inserted from the connecting surface of the wooden pile for connection.

[0017] The connecting member of the present invention includes an insertable body that can be fitted into the bottom end of a steel pipe pile for connection, thereby sealing the inside of the steel pipe pile and enabling connection. Furthermore, the insertable body is provided with a connecting rod that can be pressed in or inserted from the connecting surface of a wooden pile for connection, so the side opposite to the side connected to the steel pipe pile can be connected to the wooden pile by the connecting rod.

[0018] [4] In order to achieve the above objective, the connecting member of the present invention is a connecting member for use in a foundation pile of the invention of [1] or [2], comprising: an insert body that can be fitted into the bottom end of the steel pipe pile for connection and has a plurality of contact surfaces that are in close contact with the inner surface of the steel pipe pile; and a connecting rod body provided in the insert body that can be pressed in or inserted into the connecting surface of the wooden pile for connection.

[0019] According to the connecting member of the present invention, since the insert has multiple contact surfaces that closely adhere to the inner surface of the steel pipe pile, the contact area and frictional force are smaller compared to, for example, cylindrical or cylindrical shapes, which makes it easier to attach and detach the insert from the steel pipe pile during welding and other operations, and also has the advantage of being able to be sealed. Furthermore, since the insert is provided with a connecting rod that can be pressed in or inserted from the connecting surface of the wooden pile, the side opposite to the side connected to the steel pipe pile can be connected to the wooden pile by the connecting rod.

[0020] [5] The connecting member of the present invention may also be configured such that, in the invention of [3], a flange member that contacts the connecting surface of the wooden pile is provided on the side of the insert body where the connecting rod is provided.

[0021] In this case, when the connecting members are connected by the connecting rod, the flange member comes into contact with the connecting surface of the wooden pile, thus stabilizing the contact surfaces between the wooden pile and the flange plate. This allows for more stable driving of the foundation piles into the ground.

[0022] [6] The connecting member of the present invention may also be configured in which, in the invention of [3], a required number of protrusions for preventing slippage against the steel pipe pile are provided on the outer surface of the insert.

[0023] In this case, since a required number of protrusions for preventing slippage relative to the steel pipe pile are provided on the outer peripheral surface of the fitting body, the connecting member can be connected to the steel pipe pile by a firm fit. Accordingly, if the connecting force is sufficient, welding connection is not necessarily required, and the connecting operation can be simplified.

[0024] [7] In the connecting member of the present invention according to the invention of [3], a required number of band plates for preventing slippage relative to the steel pipe pile may be provided in the circumferential direction on the outer peripheral surface of the fitting body.

[0025] In this case, since a required number of band plates for preventing slippage relative to the steel pipe pile are provided in the circumferential direction on the outer peripheral surface of the fitting body, the connecting member can be connected to the steel pipe pile by a firm fit. Accordingly, if the connecting force is sufficient, welding connection is not necessarily required, and the connecting operation can be simplified.

[0026] [8] To achieve the above object, the method for constructing a foundation pile of the present invention includes a step of installing a wood pile at a predetermined position in the surface layer portion of the ground, a step of press-fitting or inserting the connecting rod body of the connecting member into the wood pile to connect the pile strut, in which the connecting member is connected to the bottom end of the steel pipe pile, so as to form the foundation pile, a step of press-fitting the foundation pile to a predetermined depth in the ground, a step of cutting off the upper portion of the steel pipe pile of the pile strut to a predetermined length, a step of attaching a lid body to the top of the steel pipe pile, a step of filling the space of the hole formed by the wood pile around the steel pipe pile with a solidifying filler, and a step of compacting the filler by rolling compaction.

[0027] According to the method for constructing a foundation pile of the present invention, the position for constructing the foundation pile in the ground can be determined by the step of installing the wood pile at the predetermined position in the surface layer portion of the ground. In addition, the foundation pile can be formed by connecting the components (the wood pile and the pile strut) during the construction process through the step of connecting the pile strut, in which the connecting member is connected to the bottom end of the steel pipe pile, to the wood pile by press-fitting or inserting the connecting rod body of the connecting member to form the foundation pile.

[0028] Furthermore, the process of driving the foundation piles into the ground to a predetermined depth allows for the wooden piles to be positioned below the groundwater level where they are less susceptible to corrosion, while the pile supports using steel pipe piles can be positioned in areas with groundwater level fluctuations or shallower than the groundwater level where they are less susceptible to corrosion. In addition, the process of cutting off the upper part of the steel pipe pile of the pile support to a predetermined length allows for the height of the steel pipe pile to be appropriately set to a height at which the foundation can be constructed.

[0029] Furthermore, by attaching a cover to the top of the steel pipe pile, the top of the steel pipe pile is sealed with a cover, which prevents problems that could occur during the construction of foundation piles, such as when filling the space around the steel pipe pile with filling material after it has been pressed into the ground, where wet sand or soil gets trapped inside the steel pipe pile, or when rainwater penetrates before the foundation is constructed, thus promoting corrosion from the inside over the long term.

[0030] Furthermore, by filling the space around the steel pipe pile with a solidifying filler material, the material filling the space around the steel pipe pile can be replenished. By compacting the filler material, sufficient strength can be imparted to the filler material, thereby ensuring the strength of the foundation pile and its surroundings.

[0031] [9] In the construction method for foundation piles of the present invention, in the step of installing the wooden pile of the invention of [8] at a predetermined position in the ground, a guide portion may be provided in the ground to assist in the sinking of the wooden pile.

[0032] In this case, if the ground is too strong to drive the wooden piles directly into the ground, guide sections consisting of soft or weak areas can be created in the ground to guide the wooden piles. This prevents damage to the foundation piles and allows for smoother construction of the foundation piles. [Effects of the Invention]

[0033] The present invention provides a foundation pile, a connecting member used therein, and a method for constructing a foundation pile, which has a structure in which wooden piles and steel pipe piles are connected, by facilitating the construction of the foundation pile during the construction process without special processing of the connecting part, and by enabling the wooden piles and steel pipe piles, which are the constituent members, to be transported to the site separately, thereby preventing damage during transportation and construction. [Brief explanation of the drawing]

[0034] [Figure 1] This is a front view diagram illustrating an embodiment of the foundation pile according to the present invention. [Figure 2] Figure 1 is an exploded perspective view of the foundation piles shown. [Figure 3] This is a perspective view illustrating a first modified example of a connecting member for a foundation pile according to the present invention. [Figure 4] This is a perspective view illustrating a second modified example of the connecting member for a foundation pile according to the present invention. [Figure 5] This is a perspective view illustrating a third modified example of the connecting member for a foundation pile according to the present invention. [Figure 6] This is a perspective view illustrating a first modified example of the cover for a foundation pile according to the present invention. [Figure 7] This is a perspective view illustrating another example of a pile support, showing a pile support formed by internally fitting and welding a connecting member to the bottom end of steel pipe piles bundled with bands. [Figure 8] This is an explanatory diagram showing a method for constructing foundation piles according to the present invention. [Figure 9] This is an explanatory diagram showing the state of the foundation being placed on top of the constructed foundation piles. [Modes for carrying out the invention]

[0035] Embodiments of the foundation pile of the present invention will be described in more detail with reference to Figures 1 and 2. Foundation pile A is equipped with wooden pile 1. Wooden pile 1 is made from natural wood such as pine, which has a high resin content, and is formed into a roughly cylindrical shape with a slightly narrowed (slightly tapered) lower end.

[0036] Furthermore, the length of the wooden pile 1 is formed to a predetermined length that is adapted to the moisture content of the ground, for example, and is generally used with the lower end facing downwards and the lower end facing upwards. The connecting surface 10, which is the lower end of the wooden pile 1, is a circular plane, and a center point 100 is marked in its center to serve as a guide for the position where the connecting rod 212, which will be described later, will be pressed in or inserted. Note that a guide hole (not shown) may be provided at the center point 100 to assist in pressing in the connecting rod 212.

[0037] A pile support column 2 is connected to the connecting surface 10 of the wooden pile 1. The following components of the pile support column 2 are made of steel. The pile support column 2 has a cylindrical steel pipe pile 20 of a predetermined length and a predetermined diameter, and a connecting member 21 is connected to the bottom end (which becomes the bottom during construction: the lower end) of the steel pipe pile 20.

[0038] The connecting member 21 has a cylindrical insert body 210 of a predetermined length, and a circular flange member 211, slightly larger in diameter than the insert body 210, is provided at its bottom end. The diameter of the insert body 210 is formed to be approximately the same as the inner diameter of the steel pipe pile 20 so that it can be fitted into the inner diameter portion, and the diameter of the flange member 211 is the same as the outer diameter of the steel pipe pile 20. Note that the insert body 210, including each of the insert bodies described later, can also be formed in a cylindrical shape.

[0039] Furthermore, a connecting rod 212 is provided at the center of the flange member 211, having a predetermined length that protrudes downward in a direction perpendicular to the flange member 211, and is intended to be pressed into the connecting surface 10 of the wooden pile 1 for connection.

[0040] In this embodiment, the connecting rod 212 is round, but it is not limited to this shape. Various types of square rods, and even those with a surface treated with knurling or other anti-slip processes, can be used. The connecting member 21 is usually connected to the steel pipe pile 20 by welding the insert 210, but this method is not limited to this method as long as the connection strength is sufficient.

[0041] Furthermore, a cover 22 is attached to the upper end of the steel pipe pile 20, which is set to a predetermined length. As will be explained in the construction method described later, the cover 22 is attached to the height-adjusted steel pipe pile 20a, so in Figures 1 and 2, the steel pipe pile is designated with the reference numeral 20(20a) for convenience.

[0042] Furthermore, the cover 22 has a cylindrical insert 220 of a predetermined length, and a circular flange member 221, slightly larger in diameter than the insert 220, is provided at its upper end. The diameter of the insert 220 is formed to be approximately the same as the inner diameter of the steel pipe pile 20 so that it can be fitted into the inner diameter portion, and the diameter of the flange member 221 is the same as the outer diameter of the steel pipe pile 20. Note that the connecting member 21 can also be used as the cover (top cover) of the steel pipe pile 20 by eliminating the connecting rod 212.

[0043] The foundation pile A is constructed by pressing a connecting rod 212 into the center of the connecting surface 10 of the wooden pile 1 to connect the pile support 2, and then attaching a cover 22 to the top of the steel pipe pile 20. As will be described later, the foundation pile A is usually formed in the ground (underground) during construction into the ground, but this does not exclude other construction methods that involve pre-integrating the wooden pile 1 and the pile support 2 and then erecting them in the soil.

[0044] Here, with reference to Figures 3 to 5, a modified example of the connecting member will be described. Figure 3 shows a connecting member 23, which is a first modified example of the connecting member 21. The connecting member 23 has a cylindrical insert body 230 of a predetermined length, and at its bottom end, a circular flange member 231 and a connecting rod 232, which are slightly larger in diameter than the insert body 230, are provided in the same manner as the insert body 210. The diameter of the insert body 230 is formed to be approximately the same as the inner diameter of the steel pipe pile 20 so that it can be fitted into the inner diameter portion, and the diameter of the flange member 231 is the same as the outer diameter of the steel pipe pile 20.

[0045] Furthermore, the outer surface of the insert body 230 is provided with a number of steel protrusions 233 arranged in a regular pattern. However, the arrangement of the protrusions 233 may be irregular, or other materials may be used, as long as they provide sufficient anti-slip and anti-loosening effects to the steel pipe pile 20 into which the insert body 230 is attached.

[0046] Figure 4 shows a connecting member 24, which is a second modified example of the connecting member 21. The connecting member 24 has a cylindrical insert body 240 of a predetermined length, and at its bottom end, a circular flange member 241 and a connecting rod 242, which are slightly larger in diameter than the insert body 240, are provided in the same manner as the insert body 210. The diameter of the insert body 240 is formed to be approximately the same as the inner diameter of the steel pipe pile 20 so that it can be fitted into the inner diameter portion, and the diameter of the flange member 241 is the same as the outer diameter of the steel pipe pile 20.

[0047] Furthermore, four strip plates 243 are attached to the outer surface of the inset body 240 at equal intervals in the circumferential direction, and the upper part of each strip plate 243 is bent and attached toward the upper surface (reference numeral omitted) of the inset body 240.

[0048] The material of the strip plate 243 is a metal such as steel or iron, synthetic resin, or rubber, which can provide sufficient anti-slip and anti-loosening effects on the steel pipe pile 20 to which the embedded body 240 is attached, but is not limited to these. Alternatively, a sheet of the same material may be provided over the entire outer surface of the embedded body 240 to serve as a wrapping material.

[0049] The connection of the connecting members 23 and 24 to the steel pipe pile 20 is usually performed by welding the insert body 230 and insert body 240 in the same manner as the insert body 210, but is not limited to this method as long as the connection strength is sufficient.

[0050] Figure 5 shows a connecting member 25, which is a fourth modified example of the connecting member 21. The connecting member 25 is capable of being fitted and connected to the bottom end of the steel pipe pile 20, and has a cross-sectional shape with a plate body (reference numeral omitted), and comprises an insert body 250 having a contact surface 253 on each of the four circumferential plates that are in close contact with the inner surface of the steel pipe pile 20.

[0051] Furthermore, a circular flange member 251 and a connecting rod 252, slightly larger in diameter than the insert body 250, are provided at the bottom end of the insert body 250, similar to the insert body 210. The diameter of the insert body 250 is formed to be approximately the same as the inner diameter of the steel pipe pile 20 so that it can be fitted into the inner diameter portion, and the diameter of the flange member 251 is the same as the outer diameter of the steel pipe pile 20.

[0052] Furthermore, the four plate-shaped components of the insert body 250 each have a small contact area with the inner diameter portion of the steel pipe pile 20, allowing for a slightly tight fit. This enables connection not only by welding but also by driving the components into the ground. In addition, each plate is provided with a slanted, tapered guide section 254 at its tip to facilitate driving into the ground.

[0053] Furthermore, referring to Figure 6, a modified example of the cover 22, the cover 26, is shown. The cover 26 has a cylindrical insert 260 of a predetermined length, and a circular flange member 261, slightly larger in diameter than the insert 260, is provided at its upper end. The diameter of the insert 260 is formed to be approximately the same as the inner diameter of the steel pipe pile 20 so that it can be fitted into the inner diameter portion, and the diameter of the flange member 261 is the same as the outer diameter of the steel pipe pile 20.

[0054] Furthermore, linear buffers 262 are provided at four equally spaced points in the circumferential direction on the outer surface of the inlay body 260, extending almost the entire height. The material of the buffers 262 is a synthetic resin or rubber that can provide sufficient cushioning against the steel pipe pile 20 to which the inlay body 260 is attached, but is not limited to these materials. This prevents damage to the cover body 22 attached to the steel pipe pile 20.

[0055] Furthermore, when constructing the pile support columns 2 for the foundation piles, if a connecting member 21 equipped with a flange member 211 is welded to each steel pipe pile 20 that has been bundled with a band 27 to facilitate transportation and management, the welded portion will be on the outer surface where the steel pipe piles 20 come into contact with each other. As a result, adjacent steel pipe piles 20 may be welded together, which can cause problems in subsequent work.

[0056] In contrast, Figure 7 shows another example of a pile support, which is a pile support 2a formed by fitting a connecting member into the tip (which becomes the bottom end during construction) of steel pipe piles bundled with a band and welding it. In this example, the connecting member 21a of each pile support 2a does not have a flange member, and consists only of a disc-shaped insert (not shown) and a connecting rod 212a. The welded portion 213 between the insert and the steel pipe pile 20 follows the inner surface of the steel pipe pile 20, so the inconvenience of adjacent steel pipe piles 20 being welded to each other does not occur. Therefore, there is an advantage in that the work can be made more efficient in the preparation stage of construction of foundation piles, which will be described later.

[0057] Next, referring to Figures 1 to 9 (mainly Figure 8), the function of foundation pile A and the construction method of foundation pile A will be explained.

[0058] (1) Install wooden pile 1 at a predetermined position in the surface layer of the ground level (GL). This allows you to determine the position where the foundation pile A will be installed in the ground level. In addition, holes or the like can be made in the surface layer to improve the seating of wooden pile 1 (see Figure 8(a)).

[0059] (2) A pile support 2, which has a connecting member 21 attached to the bottom end of a steel pipe pile 20, is connected to the wooden pile 1 by pressing or inserting the connecting rod 212 of the connecting member 21 into the center of the connecting surface 10, thereby forming a foundation pile. In this way, by connecting the components (wooden pile 1 and pile support 2) during the construction process, a foundation pile (reference numerals omitted) can be formed in a form in which the cover 22 has not yet been attached to the steel pipe pile 20 (see Figure 8(b)).

[0060] (3) The foundation piles are driven into the ground to a predetermined depth below the ground level (GL). This positions the wooden piles 1 below the groundwater level where the wooden piles 1 are less susceptible to corrosion, and the pile support columns 2 using steel pipe piles 20 are positioned in areas with fluctuating groundwater levels or shallower than the groundwater level where the steel pipe piles 20 are less susceptible to corrosion (see Figure 8(c)). A portion of the upper side of the steel pipe piles 20 protrudes above the ground level (GL), and a space 3 is formed between the steel pipe piles 20 in the ground and the borehole wall formed by the wooden piles 1.

[0061] Furthermore, when installing the wooden pile 1 at the predetermined position on the ground level (GL), a guide section (not shown) can be provided in the ground level to assist in the insertion of the wooden pile 1. In other words, if the ground level is relatively strong or otherwise difficult to drive the wooden pile 1 in as is, a guide section consisting of soft or weak areas can be provided in the ground level to guide the wooden pile 1. This prevents damage to the foundation pile during the driving process and allows for the smooth construction of the foundation pile.

[0062] (4) Next, the excess length 200 at the top of the steel pipe pile 20 of the pile support column 2 is cut off to the predetermined length. This allows the height of the steel pipe pile 20a after height adjustment (the height when the cover 22 is attached in the next step) to be set to a height that allows for the construction of the foundations 6 and 7 (see Figure 9) (see Figure 8(d)).

[0063] (5) Then, the cover 22 is attached to the top of the steel pipe pile 20a of the pile support column 2. By covering the top of the steel pipe pile 20a with the cover 22 in this way, the foundation pile A is created in the ground (see Figure 8(e)).

[0064] By attaching the cover 22 to the steel pipe pile 20a, it is possible to prevent problems such as wet sand or soil getting trapped inside the steel pipe pile 20a during filling, or rainwater entering before the construction of the foundations 6 and 7, which would promote corrosion from the inside in the long term.

[0065] (6) After the cover 22 is installed, the space 3 formed around the steel pipe pile 20a is filled with a solidifying filler material 4. The solidifying filler material 4 is, for example, soil, crushed stone, or a solidifying agent such as ready-mixed concrete, but is not limited to these and other materials can also be used. This makes it possible to replenish the material that fills the space 3 around the steel pipe pile 20a.

[0066] (7) Finally, the filling material 4 is compacted by rolling. Compaction is performed by tapping with the compaction section 5 of a working machine (heavy machinery) or by hand. This provides sufficient strength to the filling material 4, ensuring sufficient strength for the foundation pile A and its surroundings. The compaction section can be a disc shape or a partially ring shape (a shape in which a part of a ring plate is cut out) that surrounds the steel pipe pile 20a in the circumferential direction.

[0067] (8) After this, at an appropriate time, a so-called raft foundation (a) or strip foundation (b) as shown in Figure 9 will be constructed on top of each foundation pile A, and the building or structure will be constructed.

[0068] In this way, the foundation pile A, which connects a wooden pile 1 and a pile support 2 made of steel pipe pile 20a, can be formed by connecting the parts during the construction process, eliminating the need for pre-fabrication. As a result, when constructing the foundation pile A, which connects the wooden pile 1 and the pile support 2 made of steel pipe pile 20a, the wooden pile 1 and the pile support 2 can be transported to the site separately, preventing damage to the foundation pile A during transportation and construction, as has been the case with conventional methods.

[0069] The terms and expressions used in this specification and claims are for illustrative purposes only and are not limiting in any way, and there is no intention to exclude terms or expressions equivalent to the features and parts thereof described herein and in the claims. Furthermore, it goes without saying that various modifications are possible within the scope of the technical concept of the present invention. [Explanation of symbols]

[0070] A Foundation pile 1 wooden stake 10 Connecting surface 100 center point 2 Pile support 20a Steel pipe pile (after height adjustment) 20 Steel pipe pile 200 Extra length 21 Connecting member 210 Inset body 211 Flange member 212 Connecting rod 22 Lid 220 Inset body 221 Flange member 23 Connecting member 230 Inset body 231 Flange member 232 Connecting rod 233 Protrusion 24 Connecting member 240 Inlaid body 241 Flange member 242 Connecting rod 243 Strip 25 Connecting member 250 Inset body 251 Flange member 252 Connecting rod 253 Contact surface 254 Guidance part 26 Lid 260 Inlaid body 261 Flange member 262 Buffer 27 bands 2a Pile support 21a Connecting member 212a Connecting rod 213 Welded section 3 space 4 Filling material 5. Compaction section 6. Slab foundation 7. Strip foundation

Claims

1. A wooden stake of a predetermined length, with a roughly cylindrical shape that tapers towards the bottom, It is equipped with a stake support that can be connected to the wooden stake, The aforementioned pile support is It comprises a steel pipe pile of a predetermined length, and a connecting member having one end connected to the bottom end of the steel pipe pile and the other end provided with a connecting rod that is pressed in or inserted from the connecting surface of the wooden pile to connect them. Foundation piles.

2. The steel pipe pile has a cover that can be attached to the top of the pile. Foundation pile according to claim 1.

3. A connecting member for use in foundation piles according to claim 1 or claim 2, An insertable body that can be fitted and connected to the bottom end of the steel pipe pile, A connecting rod is provided in the fitting body and can be pressed in or inserted into the connecting surface of the wooden pile to connect them, A connecting member comprising:

4. A connecting member for use in foundation piles according to claim 1 or claim 2, An insert body that can be fitted and connected to the bottom end of the steel pipe pile and has multiple contact surfaces that closely adhere to the inner surface of the steel pipe pile, A connecting rod is provided in the fitting body and can be pressed in or inserted into the connecting surface of the wooden pile to connect them, A connecting member comprising:

5. A flange member is provided on the side of the insert body where the connecting rod is located, which contacts the connecting surface of the wooden pile. The connecting member according to claim 3.

6. The outer surface of the insert is provided with a required number of protrusions to prevent it from slipping against the steel pipe pile. The connecting member according to claim 3.

7. The outer surface of the embedded body is provided with a required number of strip plates in the circumferential direction to prevent slippage against the steel pipe pile. The connecting member according to claim 3.

8. The process involves installing wooden piles at designated locations in the surface layer of the ground, The process of forming a foundation pile involves connecting a pile support column, which has a connecting member attached to the bottom end of a steel pipe pile, to the aforementioned wooden pile by pressing or inserting the connecting rod of the connecting member, The process of driving the aforementioned foundation piles into the ground to a predetermined depth, The process of cutting off the upper part of the steel pipe pile of the pile support column to a predetermined length, The process of attaching a cover to the top of the steel pipe pile, The process involves filling the space in the hole formed by the wooden pile around the steel pipe pile with a solidifying filler, The process of rolling and compacting the aforementioned filler, A method for constructing foundation piles equipped with [a specific feature / feature].

9. In the process of installing the wooden pile at a predetermined position in the ground, a guide portion is provided in the ground to assist in the sinking of the wooden pile. A method for constructing foundation piles according to claim 8.

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