JP4335958B2 - Simple foundation - Google Patents

Description

  The present invention relates to a foundation of a building, and more particularly to a simple foundation using a pile and a foundation work method using the same.

  Parks may be constructed by building structures such as bridges, sidewalks, stairs, fences, benches, tables and playground equipment in green areas, wetlands, swamps, riverbeds, and satoyama. A foundation is needed to support these buildings. If it is a normal house etc., the method of excavating the ground, hitting the discarded concrete, pouring the ready-mixed concrete into the frame built on the discarded concrete, and forming the foundation is taken. However, in a green zone as described above, it is difficult for a ready-mixed concrete vehicle to enter, and even if it can enter, the natural environment is destroyed, which is not preferable. Furthermore, foundations made of concrete are extremely difficult to remove when the building is no longer needed. Therefore, the foundation made of concrete is left in the natural environment as it is, which leads to environmental destruction.

  Various simple basics have been proposed. Patent Document 1 proposes a simple foundation formed by inserting four guide sleeves into a cylindrical, quadrangular, or triangular column foam and injecting concrete into the foam (Patent Document 1). Fig. 4 etc.). By passing the guide sleeve and driving the pile into the ground, the foam and the pile become the foundation of the building fixed thereon.

  In Patent Document 2, a technique in which a bracket formed in a U-shaped cross section is fixed to a pillar, a pile is inserted into a hole provided in the bracket, and the pile is driven into the ground, thereby constructing a foundation Is disclosed (see FIG. 1 etc. of Patent Document 2). In Patent Document 2, a bracket having an H-shaped cross section is also proposed (see FIG. 3 in Patent Document 2). Moreover, in patent document 2, the simple foundation which drives a pile with respect to the structure of a square pillar is also proposed (refer FIG.8, 9 grade | etc., Of patent document 2).

  In patent document 3, the simple foundation which inserts a pile into the foundation solidified with concrete and drives the said pile into the ground is proposed. In Patent Document 3, a taper-shaped dowel is inserted into upper and lower foams made of plastic, concrete is injected, and a foundation is formed in which holes for inserting piles are formed (patent) (See FIG. 2 etc. in Document 3). After the concrete is solidified, the upper and lower foams and dowels are removed, and a slightly thinner pile is inserted into the hole made by the dowels and driven into the ground (see FIG. 3 in Patent Document 3).

  Patent Document 4 discloses a technology that is the basis of a concrete wall. In Patent Document 4, a sleeve is passed through two opposing scaffold members, and a concrete wall is formed between the two scaffold members (see FIGS. 1 and 3 of Patent Document 4). A pile is inserted into the sleeve, and the pile is driven into the ground (see FIG. 3 in Patent Document 4).

  Patent Document 5 discloses a simple foundation for a greenhouse. The simple foundation in patent document 5 contains the head part formed from block-shaped concrete, and two or more piles inserted in the said head part. When the pile is driven into the ground, the simple foundation becomes the foundation of the greenhouse.

  Patent Document 6 proposes a simple foundation in which a sleeve is attached to a body portion having an upper flange and a lower flange, and a pile is inserted into the sleeve (see FIG. 1 of Patent Document 6). Moreover, the simple foundation which strengthens a yield strength by the connection member for connecting a some upper flange and a lower flange is also disclosed (FIG. 3, FIG.4 and FIG.5 of patent document 6). In a simple foundation with enhanced proof strength, a fixing method using anchor bolts is also disclosed (see FIG. 6 of Patent Document 6).

FIG. 18 is a perspective view showing a simple foundation disclosed in Patent Document 7. FIG. As shown in FIG. 18, Patent Document 7 proposes a simple foundation including an upper fixing plate 900, a lower fixing plate 901, and a plurality of sleeves 902 connected to the upper fixing plate 900 and the lower fixing plate 901. (See, for example, FIG. 3 of Patent Document 7). The pile 903 is inserted into the sleeve 902, and the pile 903 is driven into the ground, whereby fixation to the ground is realized.
US Pat. No. 5,039,256 US Pat. No. 5,395,184 US Pat. No. 6,910,832 U.S. Pat. No. 7,076,925 JP 2002-30679 A JP-A-2005-299214 JP 2005-299215 A

  The simple foundation according to Patent Document 1 must be filled with concrete and solidified before being transported to the construction site. Therefore, heavy objects hardened with concrete must be transported to the construction site. Thus, since the simple foundation itself is heavy, it is not only inconvenient for construction but also difficult to transport to the construction site.

  The simple foundation according to Patent Document 2 does not use concrete. However, the bracket itself is fixed to the side surface of the column with a bolt or the like. Just fixing the side face with bolts against the vertical load of the building leaves uneasy strength. In addition, since bridges and sidewalks are often made of wood, it is impossible to perform a basic function when the wood deteriorates only by fixing bolts on the side. FIG. No. 8 discloses a square columnar base placed horizontally, but is inconvenient for transportation. Further, FIG. 9 discloses the foundation of a vertically-rectified quadrangular prism, but is inconvenient for transportation. Further, FIG. 9 does not specifically disclose a method for fixing a building.

  The simple foundation according to Patent Document 3 also has the same problem as the simple foundation according to Patent Document 1.

  The simple foundation which concerns on patent document 4 can be used only for a concrete wall, and cannot be used for the foundation of all structures, such as a bridge and a sidewalk.

  The simple foundation according to Patent Document 5 also has the same problems as the simple foundation according to Patent Document 1 because the head portion is made of concrete.

  In the simple foundation according to Patent Document 6, although concrete is not used, a connecting member for connecting the upper and lower flanges is required, and the structure becomes complicated. Patent Document 6 discloses that the upper and lower flanges and the connecting member are fixed by welding in addition to the bolts, but the structure is complicated and there is a problem in terms of manufacturing cost.

  In the simple foundation concerning patent document 7, the load of a building will be applied to the cover 904. FIG. The load applied to the cover 904 is applied to the upper fixing plate 900. The load applied to the upper fixing plate 900 is decomposed into the horizontal direction and the direction of the sleeve 902. Since the upper fixing plate 900 is a straight plate member, the force decomposed in the horizontal direction is smaller than the force decomposed in the direction of the sleeve 902. Therefore, a lot of load is applied to the sleeve 902. Therefore, a large load may be applied to the joint portion 905 between the upper fixing plate 900 and the sleeve 902 and the joint portion 906 between the lower fixing plate 901 and the sleeve 902. Therefore, the joint portions 905 and 906 may break due to long-term use.

  Therefore, an object of the present invention is to provide a simple foundation that can be easily constructed without using concrete as much as possible. Another object of the present invention is to provide a low-cost simple foundation that can withstand long-term use.

In order to solve the above problems, the present invention has the following features. The present invention is a simple metal base for supporting a supported body, in which one or more driven piles to be driven in an inclined state in soil, the driven piles are inserted, and the supported body is attached at the top A support portion having a mounting bracket for mounting , the support portion is a hollow substantially spherical shape or a substantially elliptical spherical shape, and is placed so that a lower portion of the support portion is in contact with the ground, and the driven pile is a supported body It is inserted into the part inclined like a bowl toward the part where the driving pile is inserted from the part where the stake is attached.

In the present invention, the load of the supported body can be dispersed and the strength of the supporting part can be improved by adopting a saddle-like structure from the part where the supported body is attached to the part where the driven pile is inserted. it can. Therefore, the simple foundation which does not use concrete will be provided. When the pile is driven through the support, the simple foundation of the present invention functions as a pile foundation by the frictional force of the driven pile. In addition, since the supporting force of the supporting portion itself exists, the simple foundation of the present invention also has a function as a direct foundation in an auxiliary manner. If the driven pile reaches the supporting ground, the drag by the supporting ground will also affect the realization of the pile foundation. When constructing supported bodies such as bridges, sidewalks, stairs, fences, benches, tables, playground equipment, etc. in green areas, wetlands, swamps, river beds, satoyama, etc., the ground is often soft. If the simple foundation of this invention is used, even if it is such a soft ground, it becomes possible to support a to-be-supported body. Since construction on such soft ground is often difficult, construction is required to be simple. The simple foundation of the present invention is lightweight because it does not use concrete. Therefore, it is not necessary to carry to the construction site easily, and it is not necessary to let the ready-mixed vehicle enter the construction site. Therefore, easy construction will be realized. Further, since the simple foundation of the present invention is made of metal, it can be recovered and recycled when the support is no longer needed, which is useful for preventing environmental destruction. Furthermore, since the simple foundation of the present invention is entirely made of metal and concrete is not used, it is provided at a low cost. Furthermore, by making the support portion into a hollow substantially spherical shape or substantially elliptical sphere shape, it is possible to provide a support portion that has a bowl shape from the portion to which the support is attached to the portion into which the driven pile is inserted. The hollow support portion having a substantially spherical shape or a substantially elliptical spherical shape is easy to manufacture and can provide a simple foundation at low cost. Moreover, since the substantially spherical or substantially elliptical spherical support portion itself has a strong shape, a simple foundation that can withstand long-term use is provided.

  Preferably, the support portion includes one or more cylindrical guide portions for guiding the driven pile, and each guide portion is arranged to be inclined according to the inclination angle of the driven pile, and has at least a hook-like shape. It is good to be joined at a part.

  Thus, by providing the cylindrical guide portion, the driven pile can be driven into the soil at an appropriate inclination angle, and the construction becomes easy. Furthermore, in this invention, the junction part of a guide part and a support part is located in the bowl-shaped part. In the bowl-shaped portion, most of the load on the supported body is decomposed in the bowl-shaped tangential direction. Therefore, the load decomposed in the traveling direction of the guide portion is smaller than the load decomposed in the tangential direction. Therefore, the load directly applied to the guide portion can be made as small as possible. Thereby, it is possible to prevent the joint portion between the guide portion and the support portion from being broken, to improve the strength of the support portion, and to provide a simple foundation that can withstand long-term use. .

  Preferably, the support portion includes a hole portion provided at an upper portion so that the inside can be visually recognized, an anchor bolt inserted from below to the hole portion, and a lid for penetrating the anchor bolt and closing the hole portion. Part.

  When inserting the pile to be driven in, the driven pile can be driven into an appropriate position by visual recognition from the hole. Moreover, when inserting an anchor bolt, the position of an anchor bolt can be confirmed by visually recognizing from a hole part. Therefore, construction can be performed easily.

  Preferably, at least a part of the outer diameter of the lid part is smaller than at least a part of the inner diameter of the hole part.

  Thereby, since a space | gap will be made between a hole part and a cover part, a cover part can be moved. Therefore, when attaching a to-be-supported body, the position of an anchor bolt can be adjusted finely and workability | operativity improves.

  Preferably, the support portion further includes an attachment fitting for fixing a supported body attached to the anchor bolt, and the attachment fitting has a gap portion for fastening a nut attached to the anchor bolt.

  Thereby, it can attach to an anchor bolt and a to-be-supported body to an attachment metal fitting.

  Preferably, the support portion further includes one or more cylindrical guide portions for guiding the driven pile, and each guide portion is arranged to be inclined according to the inclination angle of the driven pile, and has a substantially spherical shape. Or it joins by the upper half and / or lower half of substantially ellipsoidal shape.

  Thus, by providing the cylindrical guide portion, the driven pile can be driven into the soil at an appropriate inclination angle, and the construction becomes easy. Furthermore, in this invention, the junction part of a guide part and a support part is located in the upper half and / or lower half of a substantially spherical shape or a substantially elliptical spherical shape. That is, the said junction part will be located in the collar-shaped part of a support part. In the bowl-shaped portion, most of the load on the supported body is decomposed in the bowl-shaped tangential direction. Therefore, the load decomposed in the traveling direction of the guide portion is smaller than the load decomposed in the tangential direction. Therefore, the load directly applied to the guide portion can be made as small as possible. Thereby, it is possible to prevent the joint portion between the guide portion and the support portion from being broken, to improve the strength of the support portion, and to provide a simple foundation that can withstand long-term use. .

  Preferably, the guide portions are arranged such that adjacent guide portions are at equal angles.

  Thereby, the load of a to-be-supported body can be disperse | distributed equally to a some driven pile. Therefore, the simple foundation which can support a to-be-supported body stably will be provided.

  Preferably, the inclination angle of the guide portion is 40 to 60 degrees with respect to the horizontal plane.

  Thereby, the vertical support force and the horizontal support force can be made appropriate, and the subsidence and horizontal movement of the supported body can be prevented.

  Preferably, the driven pile consists of one or more sets of a cylindrical first driven pile and a second driven pile having an outer diameter smaller than the inner diameter of the first driven pile, and the second driven pile is After the first driving pile is driven, it may be driven into the soil through the cylindrical interior of the first driving pile.

  Thereby, after a 1st driving pile is driven, a 2nd driving pile can be driven, and a support force can be strengthened compared with the case where only a 1st driving pile is driven.

Preferably, the second driven pile has a cylindrical shape, the simple foundation further includes a soil-side tip member, and the soil-side tip member has a first convex portion smaller than the inner diameter of the first driven pile. The soil-side tip member has a second convex portion smaller than the inner diameter of the second driven pile on the first convex portion, and is attached to the first driven pile. When the driven pile is driven into the soil via the cylindrical interior of the first driven pile, the soil-side tip member may be attached to the second driven pile via the second convex portion .

  By using the soil-side tip member in this way, it is possible to prevent the soil from entering the first driven pile when the first driven pile is driven. Therefore, when driving the second driven pile, the second driven pile can be driven into the first driven pile by inserting the second driven pile into the first driven pile. Therefore, the placing point of the second driven pile can be lowered, and workability is improved.

Preferably, the support portion includes one or more cylindrical guide portions for guiding the first and second driven piles, the second driven pile is cylindrical, and the simple foundation is on the placement side. The driving member further includes a tip member. The driving side tip member includes a tip portion having an outer diameter larger than the inner diameter of the guide portion. When the first driving pile is driven, the driving side tip member is the first driving member. After the first driving pile is driven and is left on the driving side of the guide part and the second driving pile is driven, the driving side tip member is attached to the driving side of the pile. After the second driving pile is removed from the driving side and the second driving pile is inserted into the cylindrical inside of the first driving pile, the driving tip member is attached to the driving side of the second driving pile. It is better to use for driving piles .

  Thereby, when driving in the first and second driving piles, it is possible to protect the tip of the driving side. Moreover, placement becomes easy.

  Preferably, a cap member attached to the driving-side tip of the first driving pile is further provided.

  Thereby, it can prevent that a foreign material mixes in the driving pile inside.

  As one embodiment, the support part includes an upper support part and a lower support part that are separable up and down, and the upper support part and the lower support part may be joined at the time of installation on soil.

  Thereby, the workability of a simple foundation improves. In addition, when a simple foundation having a relatively large size is required, the workability can be further improved by using such a vertically separated support portion.

Further, the present invention is a simple metal base for supporting the supported body, and is one or more driven piles driven in an inclined state in the soil, and a substantially spherical shape or a substantially elliptical spherical shape, The upper half of the substantially spherical shape or the substantially elliptical sphere shape, in which the driven pile is inserted and the support portion having the mounting bracket for attaching the supported body at the upper portion and the inclined portion according to the inclination angle of the driven pile And / or one or more cylindrical guide parts for guiding the driven piles joined to the support part in the lower half, and the support part is placed so that the lower part is in contact with the ground, The portion to which the driven body is attached is inserted into a portion inclined like a bowl toward the portion into which the driven pile is inserted, and at least a part of the inside of the support portion is embedded with foamed polystyrene.

  Thus, the simple foundation can be prevented from sinking due to the buoyancy of the polystyrene foam.

Further, the present invention is a simple metal base for supporting the supported body, and is one or more driven piles driven in an inclined state in the soil, and a substantially spherical shape or a substantially elliptical spherical shape, A driving pile is inserted, and a support portion having a mounting bracket for mounting the supported body at the upper portion is provided, the support portion is placed so that the lower portion is in contact with the ground, and the driven pile is a portion to which the supported body is attached Is inserted into a portion inclined like a bowl toward the portion into which the driven pile is inserted, and concrete is injected into at least a part of the inside of the support portion.

  Thereby, reinforcement of a support force can be aimed at.

In addition, the present invention is a simple metal base for supporting a supported body, which is one or more driven piles driven in an inclined state in soil, and a substantially spherical or substantially elliptical shape that can be separated vertically. And a support portion having a mounting bracket for attaching the supported body at the upper portion, and the support portion is placed so that the lower portion is in contact with the ground. Inserted into a portion inclined like a bowl toward the portion where the driving pile is inserted from the portion where the support is attached, and in the support portion, at least the lower substantially hemispherical portion or the substantially semielliptical spherical portion that can be separated, Concrete is being poured.

  Thus, the concrete is injected into the lower half, so that the burden of transportation is reduced as compared with the case where the concrete is injected into the entire support portion.

  According to the present invention, for example, by using a saddle-shaped hollow support portion having a substantially spherical shape or a substantially elliptical spherical shape, a simple foundation having a strong support force can be easily obtained without using concrete. Will be provided. In addition, by joining the guide portion for guiding the driving pile at the bowl-shaped portion, it is possible to prevent the joint portion between the guide portion and the support portion from being broken, and to further improve the strength of the support portion. As a result, a simple foundation that can withstand long-term use is provided. Furthermore, support force can be strengthened by using the first and second driven piles. When the first and second driven piles are driven, by using the soil-side tip member, the setting point of the second driven pile can be lowered, and workability is improved. Moreover, by using the driving-side tip member, the first and second driving piles can be easily driven.

  These and other objects, features, aspects and advantages of the present invention will become more apparent from the following detailed description when taken in conjunction with the accompanying drawings.

(First embodiment)
FIG. 1 is a perspective view showing the structure of a simple foundation 1 according to the first embodiment of the present invention. The simple foundation 1 is a foundation for supporting a building that is a supported body in the upper part, and is made of metal such as iron. As shown in FIG. 1, the simple foundation 1 includes a support portion 2, a lid portion 4, a mounting bracket 5, a washer 6, a nut 7, and an anchor bolt 8.

  FIG. 2 is a perspective view showing the structure of the support portion 2. FIG. 3 is a front view showing the structure of the support portion 2. FIG. 4 is a plan view showing the structure of the support portion 2. FIG. 5 is a bottom view showing the structure of the support portion 2. The support part 2 includes guide parts 3 a, 3 b, 3 c, 3 d and a hole part 9. The support part 2 has a hollow substantially spherical shape. The guide portions 3a, 3b, 3c, 3d are cylindrical pipes for guiding the first driven piles 10a, 10b, 10c, 10d (see FIG. 7 described later), respectively. The first driven piles 10a, 10b, 10c, and 10d are driven in a state of being inclined in the soil. The guide portions 3a, 3b, 3c, 3d are arranged to be inclined according to the inclination angle of the first driving piles 10a, 10b, 10c, 10d. Holes corresponding to the guide portions 3 a, 3 b, 3 c, 3 d are drilled in the support portion 2, and the guide portions 3 a, 3 b, 3 c, 3 d are inserted into the holes and are contact portions with the support portion 2. The upper half of the substantially spherical shape (for example, U1 shown in FIG. 2) and the lower half (for example, U2 shown in FIG. 2) are joined. As a joining method, any known method such as welding or bolting can be used.

  The hole 9 is provided in the upper part of the support part 2 so that the inside of the support part 2 can be visually recognized. The hole 9 is closed by the lid 4. The anchor bolt 8 is inserted from the hole 10 below the support portion 2. The lid portion 9 is provided with a hole (a hole 4a shown in FIG. 6 described later) for allowing the anchor bolt 8 to pass therethrough. The mounting bracket 5 is inserted into the anchor bolt 8 protruding from the hole 4a. The mounting bracket 5 is fixed on the lid portion 4 by a washer 6 and a nut 7. The mounting bracket 5 has a plurality of holes 5a for fixing the supported body with bolts or screws.

  As shown in FIG. 3, the guide part 3b is arrange | positioned toward the spherical body lower part from the spherical body upper part of the support part 2 so that it may become the inclination | tilt angle (theta) with respect to a horizontal surface. Similarly, the guide portions 3a, 3c, 3d are also arranged from the upper part of the sphere of the support part 2 toward the lower part of the sphere so as to have the inclination angle θ. As shown in FIG. 3, when the guide portions 3a and 3b are projected in the front direction, the angle between the guide portion 3a and the guide portion 3b is, for example, 80 degrees. In this case, the inclination angle θ is assumed to be 50 degrees. In consideration of the vertical support force and the horizontal support force, the inclination angle θ is preferably 40 degrees to 60 degrees, but is not limited thereto.

  As shown in FIGS. 4 and 5, when the guide portions 3a, 3b, 3c, and 3d are projected in the upper surface direction or the bottom surface direction, the guide portions 3a, 3b, 3c, and 3d are equal in the adjacent guide portions. It can be seen that they are arranged at an angle. For example, it is good to arrange | position so that adjacent guide parts may have an angle of 90 degree | times. As a result, the load of the supported body is evenly distributed.

  As shown in FIG. 4, the guide portions 3 a, 3 b, 3 c, 3 d are designed to avoid the course of the anchor bolt 8 so that the anchor bolt 8 inserted from the hole 10 can penetrate to the hole portion 9. Arranged. From the hole portion 9, the inside of the support portion 2 is visible. Therefore, the anchor bolt 8 can be easily inserted.

  FIG. 6 is an enlarged cross-sectional view showing the structure of the hole 9 and the lid 4 in the support portion 2. The lid part 4 has a stepped cross-sectional shape in which large and small disks are overlapped. The hole 9 has a stepped cross section, and the upper hole is larger than the lower hole. As illustrated in FIG. 6, the size of the hole 9 and the lid 4 is designed so that when the lid 4 is overlapped with the hole 9, the gap 4 c and the gap 4 b are generated. Such a gap can be generated by making at least a part of the outer diameter of the lid part 4 smaller than at least a part of the inner diameter of the hole part 9. By loosening the nut 7 and shifting the position of the lid 4, the position of the mounting bracket 5 can be finely adjusted when the supported body is mounted on the mounting bracket 5. This makes it possible to fix the supported body at an optimal position.

  As shown in FIG. 1, the mounting bracket 5 includes a bottom plate portion 5c and a top plate portion 5b. A hole for inserting the anchor bolt 8 is provided in the bottom plate portion 5c. The top plate portion 5b is a bottom portion of the supported body. The anchor bolt 8 is closed by the nut 7 in the gap between the bottom plate portion 5c and the top plate portion 5b. Therefore, the nut 7 can be loosened.

  FIG. 7 is a front view showing the structure of the simple foundation 1 in a state where the driving pile is inserted. The first driven piles 10a, 10b, 10c, and 10d are cylindrical pipes. The outer diameters of the first driven piles 10a, 10b, 10c, and 10d are smaller than the inner diameters of the guide portions 3a, 3b, 3c, and 3d. The first driving piles 10a, 10b, 10c, and 10d are respectively inserted into the guide portions 3a, 3b, 3c, and 3d and driven into the soil with a pile driving machine or a hammer. The first driven piles 10a, 10b, 10c, 10d and the guide portions 3a, 3b, 3c, 3d may be joined by bolts or welding.

  FIG. 8 is a front view showing the structure of the simplified foundation 1 in which the position of the anchor bolt 8 is clearly specified. As shown in FIG. 8, the anchor bolt 8 is pierced upward so as not to contact the guide portions 3a, 3b, 3c, 3d.

  FIG. 9 is a diagram showing the positional relationship between the guide portions 3a, 3b, 3c, 3d and the first driving piles 10a, 10b, 10c, 10d. Since the guide portions 3a, 3b, 3c, 3d are arranged at an equal angle, the first driving piles 10a, 10b, 10c, 10d are also driven into the soil at an equal angle. Therefore, the load of the supported body is dispersed. For example, when there are four guide parts as shown in FIG. 9, the guide part 3a and the guide part 3b are arranged so as to be parallel when projected in the plan view direction. Moreover, the guide part 3c and the guide part 3d are arrange | positioned so that it may become parallel, when it projects in a top view direction. And the guide part 3a and the guide part 3b, the guide part 3c, and the guide part 3d are arrange | positioned so that it may cross | intersect perpendicular | vertical, when projecting in the top view direction. With such an arrangement, the guide portions 3a, 3b, 3c, 3d are arranged at equal angles. For example, the guide part 3a is penetrated on the lower side of the sphere so as not to penetrate directly below the hole on the upper part of the sphere provided for the guide parts 3b and 3c. The same applies to the guide portions 3b, 3c, 3d. As described above, the holes provided in the sphere are uniformly arranged in the upper and lower parts of the sphere, so that the strength of the sphere itself does not decrease. In addition, the arrangement | positioning method of guide part 3a, 3b, 3c, 3d is not restricted to this.

  FIG. 10 is a diagram showing a state when the second driven piles 11a and 11b are driven. In FIG. 10, the first and second driving piles to be driven into the guide portions 3c and 3d are omitted for easy understanding of the drawing. The first driving pile 10a and the second driving pile 11a are a set. The second driven piles 11a and 11b are longer than the first driven piles 10a and 10b. Moreover, the 1st driving pile 10b and the 2nd driving pile 11b are a set. The outer diameters of the second driven piles 11a and 11b are smaller than the inner diameters of the first driven piles 10a and 10b, respectively. After the support part 2 is embedded in the hole dug in the soil and the first driving piles 10a and 10b are driven, the second driving is performed through the cylindrical interior of the first driving piles 10a and 10b. Pile 11a, 11b is driven. The same applies to the guide portions 3c and 3d. Thus, when the vertical supporting force and / or the horizontal supporting force is insufficient, the second driving pile can be driven after the first driving pile is driven. Note that the first and second driven piles and the guide portions 3a, 3b, 3c, and 3d may be joined by bolts, welding, or the like. In FIG. 10, the second driven piles 11a and 11b are longer than the first driven piles 10a and 10b. However, the second driven piles 11a and 11b are longer than the first driven piles 10a and 10b. It may be shorter than 10b. When the second driven piles 11a and 11b are shorter than the first driven piles 10a and 10b, when the second driven piles 11a and 11b are driven, the second driven piles 11a and 11b are placed on the side where the second driven piles 11a and 11b are placed. The auxiliary piles that push the second driven piles 11a and 11b are brought into contact with each other, and the second driven piles 11a and 11b are pushed forward.

  FIG. 11A is a front view of the soil-side tip member 13 used when the first and second driven piles are driven. FIG. 11B is a bottom view of the soil-side tip member 13. FIG. 11C is a plan view of the soil-side tip member 13. When the soil side tip member 13 is used, each second driven pile is cylindrical. The soil-side tip member 13 is attached to the soil-side tip of each of the first and second driven piles. The tip portion of the soil-side tip member 13 is a pointed portion 13a. The soil-side tip member 13 includes a convex portion 13b having an outer diameter smaller than the inner diameter of each first driving pile and a convex portion 13c having an outer diameter smaller than the inner diameter of each second driving pile.

  First, the soil-side tip member 13 is attached to the tip of the first driving pile, inserted into the guide portion, and the first driving pile is driven. In a state where the first driven pile is driven, the soil-side tip member 13 is located at the tip of the first driven pile in the soil. Since the soil side tip member 13 is located at the tip of the first driving pile, the soil does not enter the inside of the first driving pile. Therefore, when driving the second driven pile, the second driven pile can be smoothly inserted up to the tip of the first driven pile. Therefore, even when driving a second driven pile that is longer than the first driven pile, it is not necessary to increase the driving point. When the second driven pile is inserted into the first driven pile, the convex portion 13c enters the second driven pile. Thereafter, the second driven pile is driven into the soil. Thus, by using the soil-side tip member 13, the second driving pile can be driven smoothly without increasing the driving point.

  The convex portion 13b and the convex portion 13c may be common. That is, the soil side tip member 13 should just protrude the convex part which has an outer diameter smaller than the internal diameter of a 2nd driving pile from the cusp part 13a. However, considering the displacement of the soil-side tip member 13, the outer diameter of the convex portion 13b and the inner diameter of the first driven pile are substantially the same, and the outer diameter of the convex portion 13c and the inner diameter of the second driven pile are Are preferably substantially the same.

  FIG. 12A is a front view of the placement-side tip member 14 used when the first and second driven piles are driven. FIG. 12B is a bottom view of the placing-side tip member 14. FIG. 12C is a plan view of the placement-side tip member 14. When the placement side tip member 14 is used, each second driven pile is cylindrical. The driving side tip member 14 is attached to the driving side tip of each of the first and second driving piles. The placement-side tip member 14 includes a convex portion 14b having an outer diameter smaller than the inner diameter of each first driving pile and a convex portion 14c having an outer diameter smaller than the inner diameter of each second driving pile.

  First, the driving-side tip member 14 is attached to the driving-side tip of the first driving pile, and the first driving pile is inserted into the guide portion. The first driving pile is driven into the soil by driving the tip portion 14a of the driving-side tip member 14. The outer diameter of the distal end portion 14a is larger than the inner diameter of the guide portion. Therefore, even if the first driving pile is driven, the driving-side tip member 14 does not enter the guide portion. After the first driving pile is driven, the driving side tip member 14 is taken out from the guide portion. Thereafter, the second driven pile is driven in the same manner as the first driven pile. Thus, since the outer diameter of the front end portion 14a of the placing-side front end member 14 is larger than the inner diameter of the guide portion, the first and second driven piles can be driven in sequence.

  The convex portion 14b and the convex portion 14c may be common. That is, the placement-side tip member 14 only has to protrude from the tip portion 14a a convex portion having an outer diameter smaller than the inner diameter of the second driving pile. However, considering the displacement of the driving-side tip member 14, the outer diameter of the convex portion 14b and the inner diameter of the first driven pile are substantially the same, and the outer diameter of the convex portion 14c and the inner diameter of the second driven pile are Are preferably substantially the same.

  FIG. 13A is a plan view of the cap member 15 attached to the driving-side tip of the first driving pile. FIG. 13B is a front view of the cap member 15. FIG. 13C is a rear view of the cap member 15. The cap member 15 has a recess 15a that is substantially the same as the outer diameter of the first driving pile. The first driving pile is inserted into the recess 15a. Since the cap member 15 is attached to the driving-side tip of the first driving pile, it is possible to prevent unnecessary objects from entering the first driving pile, which helps to prevent deterioration of the simple foundation.

  As described above, in the first embodiment, the foundation is constructed by using the hollow support portion 2 and inserting the driving pile into the hollow support portion 2. Therefore, a simple foundation that can be easily constructed without using concrete is provided. In the first embodiment, the driving pile is guided by the guide portions 3a, 3b, 3c, and 3d, so that the ease of construction is further improved.

  Moreover, since the support part 2 is a substantially spherical shape, the load concerning the support part 2 is decomposed | disassembled into the tangential direction of a spherical surface, and the center direction of a sphere. In the case of a sphere structure, much of the load is decomposed in the tangential direction of the spherical surface as in the arch structure, and becomes a force for compressing the sphere. That is, the force resolved in the center direction of the sphere is much smaller than the force resolved in the tangential direction of the spherical surface. Thus, since the force which goes to the center direction of the support part 2 is small, it can prevent that the support part 2 itself is destroyed by long-term use. Therefore, even if it does not use concrete, the simple foundation which the intensity | strength of support part itself improved will be provided.

  Furthermore, in the first embodiment, the guide portions 3a, 3b, 3c, 3d are joined at the upper and lower halves of a substantially spherical shape. The force decomposed toward the center of the sphere, that is, the force applied to the guide portions 3a, 3b, 3c, and 3d is smaller than the force acting in the tangential direction. Therefore, the force applied in parallel to the direction of travel of the guide portions 3a, 3b, 3c, 3d at the joint portion between the guide portions 3a, 3b, 3c, 3d and the support portion 2 is smaller than the force applied vertically. In the guide portions 3a, 3b, 3c, and 3d, the force applied vertically is supported by the entire sphere, so the influence exerted on the destruction of the joint portion by the force applied vertically is small. On the other hand, since the force applied in parallel needs to be supported only by the joining portion, the influence exerted on the destruction of the joining portion by the force applied in parallel is great. However, in this embodiment, since the force applied in parallel is small, the joint portion can be prevented from being destroyed as much as possible. As a result, a simple foundation that can withstand long-term use is provided.

  Further, the simple foundation according to the first embodiment can be manufactured by processing general-purpose metal materials such as a sphere, a pipe, and a sheet metal, so that the cost is low. It can also be recycled.

  The shape of the support portion is not limited to a substantially spherical shape. For example, the support part may be substantially elliptical. If the support portion is hollow, a simple foundation using no concrete can be realized, and the support portion is not limited to a substantially spherical shape or a substantially elliptical spherical shape. Considering the load resistance of the support portion itself, the portion in which the pile to be driven is inserted (the first portion in the first embodiment) from the portion to which the support is attached (the lid portion 4 and the hole portion 9 in the first embodiment). In the embodiment, it is preferable that at least a hook shape is formed toward the guide portions 3a, 3b, 3c, 3d). It can be expected that when the upper portion of the support portion has a hook shape, the load of the supported body is dispersed over the entire hook surface and the support portion itself can be prevented from being broken by the load. In that case, the shape of the lower portion of the supported body is not particularly limited, and may be a bowl shape, a flat shape, or a prismatic shape.

  When the upper part of the support part is bowl-shaped, when providing the guide part, the guide part is inclined according to the inclination angle of the driving pile, and at least is joined at the bowl-shaped part. Good. By making the upper part of the support part into a hook shape and joining the guide part with the hook-like part, the force applied in parallel to the guide part can be made smaller than the force applied vertically. Therefore, destruction of the joining portion can be prevented as much as possible. As a result, a simple foundation that can withstand long-term use is provided.

(Second Embodiment)
FIG. 14 is a perspective view showing a simple foundation 1a according to the second embodiment of the present invention. In FIG. 14, parts having the same functions as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted. As described in the first embodiment, the strength of the support portion itself can be improved by making the support portion into a substantially spherical shape or a substantially elliptical sphere shape so that at least the upper portion has a bowl shape.

  Therefore, as shown in FIG. 14, without providing the guide portions 3a, 3b, 3c, 3d, only the holes 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b for inserting the driving piles are provided. The driving pile may be driven.

  In FIG. 14, the driven pile inserted from the hole 31a is pulled out of the hole 31b and driven into the soil. The driving pile inserted from the hole 32a comes out of the hole 32b and is driven into the soil. The driving pile inserted from the hole 33a comes out of the hole 33b and is driven into the soil. The driving pile inserted from the hole 34a comes out of the hole 34b and is driven into the soil. When the driven pile is driven, the position of the driven pile can be confirmed from the hole portion 9 (not visible in FIG. 14), so that the driven pile can be inserted into an appropriate hole.

  As shown in the second embodiment, in the present invention, the support portion is hollow, and the portion into which the driven pile is inserted from the portion (the lid portion 4 and the hole portion 9 in FIG. 14) to which the supported body is attached ( In FIG. 14, a simple foundation capable of improving the strength of the support part itself without using concrete is provided if it is in a bowl shape toward the holes 31 a, 32 a, 33 a, 34 a). Become.

(Third embodiment)
15A and 15B are front views showing the structure of the support portion 41 on the simple foundation according to the third embodiment. Other than the structure shown in FIGS. 15A and 15B, the second embodiment is the same as the second embodiment. In the third embodiment, the substantially spherical support portion 41 is separable into an upper support portion 41a and a lower support portion 41b. The upper support part 41a and the lower support part 41b have flange joints 41c and 41d, respectively. The support part 41 separated vertically is joined at the joints 42 and 43 by bolts and nuts. In FIG. 15B, the upper support portion 41a and the lower support portion 41b are joined at two locations on the edge, but the joining location is not limited to this. The upper support part 41a and the lower support part 41b may be joined at at least one position on the edge. The joining method is not limited to bolts and nuts, and any known method such as welding or adhesion may be used. After the upper support part 41a and the lower support part 41b are combined, the support part 41 is installed on the soil. The hole 44a and the hole 44b correspond to each other. The hole 45a corresponds to the hole 45b (not visible in the drawing). The hole 46a corresponds to the hole 46b (not visible in the drawing). The hole 47a (not visible in the drawing) corresponds to the hole 47b. The driving pile will be inserted into the corresponding hole.

  16A and 16B are front views showing the structure of the support portion 51 on another simple foundation according to the third embodiment. Except for the structure shown in FIGS. 16A and 16B, this embodiment is the same as the second embodiment. The substantially elliptical spherical support portion 51 can be separated into an upper support portion 51a and a lower support portion 51b. The upper support part 51a and the lower support part 51b have flange joints 51c and 51d, respectively. The support part 51 separated into the upper and lower parts is joined at the joining parts 52 and 53 with bolts and nuts. In FIG. 16B, the upper support portion 51a and the lower support portion 51b are joined at two locations on the edge, but the joining location is not limited to this. The upper support part 51a and the lower support part 51b may be joined at at least one position on the edge. The joining method is not limited to bolts and nuts, and any known method such as welding or adhesion may be used. After the upper support part 51a and the lower support part 51b are combined, the support part 51 is installed on the soil. The hole 54a corresponds to the hole 54b. The hole 55a corresponds to the hole 55b (not visible in the drawing). The hole 56a corresponds to the hole 56b (not visible in the drawing). The hole 57a (not visible in the drawing) corresponds to the hole 57b. The driving pile will be inserted into the corresponding hole.

  As shown in the third embodiment, the support part may be transported to the construction site in a separated state by making the support part vertically separable. Therefore, compared with the case where a substantially spherical or substantially elliptical spherical support portion is transported, the space of the carrier bed for transport can be effectively utilized. Also in the third embodiment, since the upper part of the support part only needs to have a bowl shape, the shape of the lower support part is not particularly limited.

  In the third embodiment, after the upper and lower support parts are joined, the guide part may be joined to the corresponding hole.

(Modification)
The following modifications can be considered with respect to the first to third embodiments. For example, the foamed polystyrene may be embedded in at least a part of the inside of the support portion. This can be expected to prevent the simple foundation from sinking in marshes.

  Moreover, in the construction site in which the ready-mixed vehicle can enter, depending on the case, concrete may be injected into at least a part of the inside of the support portion. Thereby, the reinforcement | strengthening of the further support force can be aimed at. In this case, concrete may be injected from the hole 9. Concrete may be poured before carrying in.

  Moreover, when using the support part separable up and down like 3rd Embodiment, concrete may be inject | poured into the substantially hemispherical support part or substantially hemispherical support part of the lower side at least. In this case, in the embodiment using the guide unit, it is possible not only to inject at the construction site but also to inject concrete before carrying in. Since the concrete part is only the lower half, the transportation burden is reduced to some extent.

  In each of the above embodiments, the number of driving piles may be one or more, and preferably a plurality of piles. The guide part should just be provided according to the number of driven piles. Moreover, the driving pile may not be cylindrical. The driving pile and the guide portion are not limited to a columnar shape, and may be a prismatic shape or other shapes.

(Size example)
In the said 1st-3rd embodiment, the simple foundation which has the following sizes can be provided. First, when the substantially spherical support portion 2 is used as shown in the first embodiment, the outer diameter of the support portion 2 is 8 inches (203.2 mm), 10 inches (254.0 mm), 12 inches ( 304.8 mm) and 14 inches (355.6 mm) can be considered.

  Next, consider the size in the case of using a substantially elliptical spherical support 51 as shown in the third embodiment. FIG. 17 is a cross-sectional view showing how to define the size of the support portion 51. As shown in FIG. 17, with respect to the upper support portion 51a and the lower support portion 51b, the support portion 51 has an inner diameter D, an inner radius R at the center portion, a length L of the flange portion, and a radius r of the corner roundness. And the height H other than the flange portion. The center of the inner radius R does not need to be provided on the inner diameter D. For example, R = D, r = 0.1D, and H = 0.194D. The upper support portion 51a and the lower support portion 51b are provided at intervals of 50 mm when R is 400 mm to 1500 mm. An upper support portion 51a and a lower support portion 51b are provided at intervals of 100 mm when R is 1500 mm to 3000 mm.

  Thus, by providing the simple foundation of the present invention in all sizes, it can be effectively used as the foundation of buildings such as bridges, sidewalks, stairs, fences, benches, tables, and playground equipment. If it is a small building such as a bench or a fence, a simple foundation with a small size may be used. For buildings such as medium-sized bridge girders, it is advisable to use a large-size separate simple foundation.

(Experimental example)
The simple foundation 1 shown in the first embodiment was actually manufactured, subjected to a loading test, and the ultimate supporting force was measured. In the simple foundation 1 used for the test, the diameter of the spherical support portion 2 was 267 mm. The length of the driving pile was set to three types, 1 m, 2 m, and 3 m. The diameter of each 1 m driven pile (four first driven piles 10a) was 42.7 mm. The diameter of each 2 m driven pile (four first driven piles 10a) was 42.7 mm. Among the 3 m driven piles, each of the four first driven piles 10 a had a diameter of 42.7 mm, and each of the four first driven piles 10 a had a pile length of 2 m. Further, among the 3 m driven piles, each of the four second driven piles 11 a had a diameter of 34.0 mm. Although the pile length of the second driven pile 11a was 3 m, the length protruding from the tip of the first driven pile 10a was 1 m, so the entire pile length was 3 m. The lengths of the guide portions 3a to 3d are each 0.3 m. Therefore, the length in which the driven pile is in contact with the soil and effectively functions as a foundation is a pile length of −0.3 m.

  The test was conducted secretly on the sandy grounds at the Sakai Golf Course in Hyogo Prefecture. The test was performed according to the following procedure. First, a Swedish sounding test (conforming to JIS A 1221) was performed to confirm whether the place where the simple foundation 1 is installed is soft ground. Next, the simple foundation 1 was installed in the said ground, the driving pile was laid, and the flat plate loading test (based on the ground engineering society standard JGS1521-2003) was done. The flat plate loading test was performed on the simple foundation 1 having pile lengths of 1 m, 2 m, and 3 m.

Table 1 shows the results of the Swedish sounding test. In Table 1, no. 1 and No. 1 No. 1 near No. 1 For 2 points, the N value for the depth is shown. No. At point 1, the N value is 24.3 when the depth is 2.90 m. No. At point 2, the N value is 11.4 when the depth is 2.50 m. Therefore, a depth of 2.50 m or more is inappropriate as a test layer. In the simple foundation 1 used in the test, the inclination angles of the guide portions 3a to 3d are 40 degrees. Therefore, the depth of the tip of the driving pile is about 2 m at the maximum. The test layer except the depth of 2.90 m (point No. 1) and 2.50 m (point No. 2) has an average N value of 3.0. Therefore, the test layer was a soft ground of sandy soil. Therefore, it was the ground suitable for verifying the effect of the simple foundation 1.

Next, a flat plate loading test was performed. The loading device includes a loading plate, a hydraulic jack, a stand pipe, and a reaction force device. A steel disc having a diameter of 300 mm and a thickness of 25 mm is placed on the simple foundation 1 as a loading plate, a separation type hydraulic jack is installed on the loading plate, and a stand pipe is provided between the hydraulic jack and the reaction force device. The reaction force of the hydraulic jack is received by the reaction force device. A backhoe was used as a reaction force device. The loading plate, hydraulic jack, stand pipe and reaction force device were assembled so that no eccentric load was applied. The measuring device includes a load meter and a settlement amount measuring device. A sinkage measurement device was attached to the stationary beam, and the sinkage of the simple foundation was measured. The test apparatus as described above was installed, and the maximum loading load was set to 10.5 t, the load pitch was set to 1.3125 t, and a loading test was performed by an eight-stage multi-cycle method. The results of the loading test are shown in Table 2.

Based on the results of Table 2, Table 3 shows the results of calculating the ultimate bearing capacity and the long-term allowable bearing capacity. The long-term allowable bearing capacity was 1/3 of the ultimate bearing capacity.

  As shown in Table 3, the long-term allowable bearing force of 1.31 t to 2.62 t was obtained by one simple foundation 1. In the past results of construction performed by the present applicant, the loaded load is generally 0.5 t to 3.5 t. In the past results, it has been proved that if one or more simple foundations according to this embodiment are used, it is possible to support a building even if it is sufficiently soft ground.

  Although the present invention has been described in detail above, the above description is merely illustrative of the present invention in all respects and is not intended to limit the scope thereof. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention.

  According to the present invention, a simple foundation that can be easily constructed without using concrete is provided as much as possible, and is useful in the fields of architecture and civil engineering.

The perspective view which shows the structure of the simple foundation 1 which concerns on the 1st Embodiment of this invention. The perspective view which shows the structure of the support part 2. Front view showing structure of support portion 2 The top view which shows the structure of the support part 2 Bottom view showing the structure of the support 2 The expanded sectional view which shows the structure of the hole 9 and the cover part 4 in the support part 2 Front view showing the structure of the simple foundation 1 with the driven pile inserted Front view showing the structure of the simplified foundation 1 in which the position of the anchor bolt 8 is specified The figure which shows the positional relationship of guide part 3a, 3b, 3c, 3d and the 1st driving pile 10a, 10b, 10c, 10d The figure which shows a mode when the 2nd driving pile 11a, 11b is driven Front view of soil-side tip member 13 used when first and second driven piles are driven Bottom view of soil-side tip member 13 Plan view of soil-side tip member 13 Front view of the placement-side tip member 14 used when the first and second driven piles are driven Bottom view of the placement-side tip member 14 Plan view of the placing-side tip member 14 The top view of the cap member 15 attached to the driving | running | working side front end of a 1st driving pile Front view of the cap member 15 Rear view of cap member 15 The perspective view which shows the simple foundation 1a which concerns on the 2nd Embodiment of this invention. The front view which shows the structure of the support part 41 in the simple foundation which concerns on 3rd Embodiment. The front view which shows the structure of the support part 41 in the simple foundation which concerns on 3rd Embodiment. The front view which shows the structure of the support part 51 in the other simple foundation which concerns on 3rd Embodiment. The front view which shows the structure of the support part 51 in the other simple foundation which concerns on 3rd Embodiment. Sectional drawing which shows the method of prescription | regulation of the size of the support part 51 The perspective view which shows the simple foundation currently disclosed by patent document 7

Explanation of symbols

1, 1a Simplified foundation 2, 41, 51 Support part 3a, 3b, 3c, 3d Guide part 4 Lid part 4c, 4b Gap 5 Mounting bracket 6 Washer 7 Nut 8 Anchor bolt 9 Hole 10 Hole 10a, 10b, 10c, 10d First driven pile 11a, 11b Second driven pile 12 Supported body 13 Soil-side tip member 13a Pointed portion 13b, 13c, 14b, 14c Convex portion 14 Placing-side tip member 14a Tip portion 15 Cap member 15a Recessed portion 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b Hole 41a, 51a Upper support part 41b, 51b Lower support part 42, 43, 52, 53 Joint part

Claims (16)

It is a simple metal base for supporting the supported body,
One or more driven piles driven in an inclined state in the soil;
The driving pile is inserted, and a support portion having a mounting bracket for mounting the supported body at the upper part,
The support portion is a hollow substantially spherical shape or substantially elliptical spherical shape, and is placed so that a lower portion of the support portion is in contact with the ground,
The said foundation pile is inserted in the part inclined in bowl shape toward the part in which the said pile pile is inserted from the part which attaches the said to-be-supported body, The simple foundation characterized by the above-mentioned. The support part is
A hole provided in the upper part so that the inside can be seen,
An anchor bolt inserted from below toward the hole;
The simple foundation according to claim 1, wherein the simple bolt includes a lid portion for penetrating the anchor bolt and closing the hole portion.   The simple foundation according to claim 2, wherein at least a part of an outer diameter of the lid part is smaller than at least a part of an inner diameter of the hole part. The support portion further includes an attachment fitting for fixing the supported body attached to the anchor bolt,
The said mounting bracket is a simple foundation of Claim 2 which has a space | gap part for tightening the nut attached to the said anchor bolt. The support part further includes one or more cylindrical guide parts for guiding the driving pile,
The guide portion is arranged to be inclined according to an inclination angle of the driven pile, and is joined by an upper half and / or a lower half of a substantially spherical shape or a substantially elliptic spherical shape. Item 2. A simple foundation according to item 1.   The simple foundation according to claim 5, wherein the guide portions are arranged such that adjacent guide portions are arranged at an equal angle.   The simple foundation according to claim 5, wherein an inclination angle of the guide portion is 40 degrees to 60 degrees with respect to a horizontal plane. The support part includes an upper support part and a lower support part that are separable up and down,
The simple foundation according to claim 1, wherein the upper support portion and the lower support portion are joined when installed on soil. The driven pile consists of one or more pairs of a cylindrical first driven pile and a second driven pile having an outer diameter smaller than the inner diameter of the first driven pile,
2. The second driven pile according to claim 1, wherein, after the first driven pile is driven, the second driven pile is driven into the soil through a cylindrical inside of the first driven pile. Simple foundation. The second driven pile is cylindrical,
The simple foundation further comprises a soil side tip member,
The soil-side tip member is attached to the first driven pile via a first convex portion that is smaller than the inner diameter of the first driven pile,
The soil-side tip member has a second protrusion on the first protrusion that is smaller than the inner diameter of the second driven pile,
When the second driven pile is driven into the soil via the cylindrical interior of the first driven pile, the soil-side tip member is applied to the second driven pile via the second convex portion. 10. A simple foundation according to claim 9 , characterized in that it is mounted . The support part includes one or more cylindrical guide parts for guiding the first and second driven piles,
The second driven pile is cylindrical,
The simple foundation further comprises a placement side tip member,
The placement-side tip member includes a tip portion having an outer diameter larger than the inner diameter of the guide portion,
When the first driving pile is driven, the driving-side tip member is attached to the driving side of the first driving pile, and after the first driving pile is driven, the driving portion of the guide portion is driven. Left on the construction side,
When the second driving pile is driven, the driving side tip member is removed from the driving side of the guide portion,
After the second driving pile is inserted into the cylindrical interior of the first driving pile, the driving side tip member is attached to the driving side of the second driving pile, and the second driving pile is provided. The simple foundation according to claim 9, which is used for driving a pile .   The simple foundation according to claim 9, further comprising a cap member attached to a driving-side tip of the first driving pile. The support portion includes one or more cylindrical guide portions for guiding the driving pile,
The simple foundation according to claim 1, wherein the guide portion is arranged to be inclined according to an inclination angle of the driven pile, and is joined at least at the hook-shaped portion. It is a simple metal base for supporting the supported body,
One or more driven piles driven in an inclined state in the soil;
A substantially spherical shape or a substantially elliptical sphere shape, the support pile having the mounting pile for inserting the driven pile and attaching the supported body at the top;
In order to guide the driven piles that are arranged according to the inclination angle of the driven piles and are joined to the support portion in the upper half and / or the lower half of the substantially spherical or elliptical spherical shape. One or more cylindrical guides,
The support part is placed so that the lower part is in contact with the ground,
The driven pile is inserted into a portion inclined like a bowl from a portion where the supported body is attached to a portion where the driven pile is inserted,
A simple foundation characterized in that foamed polystyrene is embedded in at least a part of the inside of the support portion. It is a simple metal base for supporting the supported body,
One or more driven piles driven in an inclined state in the soil;
A substantially spherical shape or a substantially elliptical sphere shape, the support pile having the mounting pile for inserting the driven pile and attaching the supported body at the top;
Cylindrical shape for guiding the driven pile that is arranged according to the inclination angle of the driven pile and is joined to the support portion in the upper half and the lower half of a substantially spherical shape or a substantially elliptical spherical shape. And one or more guides,
The support part is placed so that the lower part is in contact with the ground,
The driven pile is inserted into a portion inclined like a bowl from a portion where the supported body is attached to a portion where the driven pile is inserted,
A simple foundation characterized in that concrete is injected into at least a part of the inside of the support portion. It is a simple metal base for supporting the supported body,
One or more driven piles driven in an inclined state in the soil;
A substantially spherical shape or a substantially elliptical spherical shape separable in the vertical direction, with the driving pile inserted therein, and a support portion having a mounting bracket for attaching the supported body at the upper portion;
The support part is placed so that the lower part is in contact with the ground,
The driven pile is inserted into a portion inclined like a bowl from a portion where the supported body is attached to a portion where the driven pile is inserted,
In the support portion, a simple foundation is characterized in that concrete is injected into at least the lower substantially hemispherical portion or the substantially hemispherical spherical portion that can be separated.

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