JP4061346B1 - Assembly foundation and earth anchor - Google Patents

Abstract

The present invention provides a subsidence-compatible human assembly base capable of dealing with a large-scale structure, and a ground anchor capable of easily responding to subsidence and retightening of the foundation.
A triangular block 1 having sufficient strength and durability is spread on the root and a triangular pyramid unit frame is placed thereon. Furthermore, the horizontal member 5 of the triangular pyramid-shaped unit frame is connected to the upper part of the triangular lattice-like frame 2 at an upper part of the triangular lattice frame 2 so as to be connected horizontally and vertically, and a three-dimensional truss is constructed. Use as a basis so that they can be joined. The inclined member 4 that supports the top portion 9 can be expanded and contracted to cope with the settlement of the foundation. If necessary, a damper is stored in the inclined member to attenuate seismic energy. The earth anchor 20 with a plurality of blades hinged is penetrated to a predetermined depth using a machine such as a small lightweight boring machine with the blades closed. Open the blade approximately 60 degrees, apply a tensile force to the steel wire above the earth anchor, and connect the foundation to three or more locations.
[Selection] Figure 4

Description

  The present invention relates to an assembly foundation for a building and its ground anchor.

  Conventionally, there was a basic assembly method for houses. (See Patent Documents 2 to 8)

Conventionally, there have been earth anchors that connect the structure and the ground to prevent falls such as mountain retaining walls and retaining walls, to prevent landslides, and to raise the transmission line tower foundation. (Patent Documents 9 to 12)

Japanese Laid-Open Patent Publication No. 2002-371625 proposed an assembling foundation for subsidence, and a connection between the ground and an earth anchor. (Patent Document 1)
JP 2002-371625 A JP2002-054156 JP-A-11-241350 JP 07-216905 A JP 05-306526 JP-A-4-343919 JP-A-4-343918 JP-A 64-29525 JP 2003-041583 A JP 2002-88781 A JP 05-239830 A JP 05-239829 A

  When assembling the foundation locally, it was necessary to enter a heavy machine such as a crane to lift and install the divided block foundation. Also, it was necessary to pour or inject concrete or grout into the joint. Therefore, in order to construct a structure in an abundant natural area on a slope such as a mountain field, a roadway up to that point is required, and natural destruction such as tree felling and site modification will occur. (See Patent Documents 2 to 8)

  In Japanese Patent Laid-Open No. 2002-37625, an assembling foundation by human power corresponding to settlement is proposed. By allowing the height to be adjusted even if it sinks, the foundation can be minimized, and its block can also be assembled manually. However, as structures become larger, there are limits. In addition, since the base is formed by joining the base blocks with horizontal bars, it is necessary to dig an extra margin for the horizontal bars. (See Patent Document 1)

  Japanese Patent Laid-Open No. 2002-371625 has not proposed a device for attenuating seismic force as necessary.

  If the foundation is made to cope with subsidence and is made the minimum size, it will be easy to move by external force such as wind power. As a method for preventing this, Japanese Patent Laid-Open No. 2002-371625 proposed a method of connecting the foundation and the ground with an earth anchor. It is a method of attaching or integrally processing a spirally processed plate material to the end of a shaft bar or shaft tube, screwing it with a machine such as a drill, passing the upper end through the base, and fixing with a nut It is. However, in order for the superstructure to become large-scale and increase the bonding strength of the earth anchor, it is necessary to increase the number of the anchors or make the blades deeper and larger, and the screwing can be done with a light drill without using heavy equipment. It becomes difficult to respond. In addition, since the ground anchor and the base of the foundation are fixed, when the foundation sinks, it takes time and labor to dig up to fix the ground anchor and the base base fixing nut. (See Patent Document 1)

  Conventionally, earth anchors have been excavated and drilled using heavy machinery in the ground, a tensile material made of PC steel wire, PC steel rod, etc. is inserted into the hole, and a grout material is injected to form a dumping shape at the tip of the tensile material The anchor fixing body was constructed and fixed, and the anchor fixing body and the structure were connected through a tensile material.

  There has been a technique of using a steel pipe pile in which helical irregularities are formed instead of the tensile material, PC steel wire, PC steel rod, etc., and forming a fixing body made of a grout material at the tip. (See Patent Document 9)

  In the earth anchor method using a steel rod penetrated into a natural ground and utilizing its pulling resistance, a spiral protrusion blade was provided on at least a part of the steel rod, and the steel rod was penetrated into the natural ground in a screwed manner. There was a technology of the screw type earth anchor method characterized by this. This is also the same as the technique of Patent Document 1, and in order to increase the fixing force, it is necessary to use a heavy machine with a larger protruding blade. Further, the cross section of the steel bar is also determined by the compression force required at the time of penetration, and a cross section greater than the tensile force required for the earth anchor is required. (See Patent Document 12)

  A retaining member is attached to the tip of the screw shaft, which is a pair of tongue pieces that have an arc-shaped cross section on the support shaft that is supported by crossing the screw shaft, and is pivotally attached to both sides of the support shaft so that it can be opened and closed on both sides. When the screw shaft is pressed into the ground, the pair of tongue pieces are closed, and when the load is applied to the ground anchor, the pair of tongue pieces is opened around the support shaft. There was an earth anchor. In this technique, there is no screw shaft at the tip of the earth anchor, and a tongue piece that is larger than the cross section of the screw shaft is at the tip of the earth anchor. Accordingly, a considerable pressing force is required to insert the screw shaft into the ground. If the pressing force is increased, a retaining member and a tongue piece member that can withstand the pressing force are required, and if the members are increased, further pressing force is required. If the pressing force increases, the screw shaft cross section also increases, which is uneconomical. It also does not show how to take the load on the tongue.

  The purpose of the present invention is to provide a subsidized manpower assembly foundation that can handle large-scale structures, to minimize the size of digging, to attenuate seismic force as necessary, and to connect the foundation and the ground Enforce the earth anchor without using hardened materials such as heavy machinery, grout, etc., make it possible to have maximum strength, make it easy to cope with the settlement of the foundation and retighten the earth anchor There is.

The feature is that referring to FIG. 1, FIG. 2 and FIG. 4, it is a size obtained by dividing the planar size of the foundation to be constructed, and has strength and durability such as a triangular concrete block. Spread the triangle block 1 on the bottom. On top of that, a triangular latticed frame 2 configured in a triangular lattice shape in plan view is placed by a bar material (hereinafter referred to as a T-bar) made of a steel material having a T-shaped cross section . The vertical portion of the T bar is put between the triangular block 1 and the triangular block 1 , the horizontal portion of the T bar is placed on both triangular blocks 1 , and the fastening bracket 3 such as a bolt is used to Tighten with the triangle block 1. A three-dimensional truss 7 is constructed by connecting one or more triangular pyramid unit frames 6 formed by joining or integrally processing the inclined member 4 and the horizontal member 5 to each other in the horizontal direction and the height direction. The horizontal member 5 positioned at the bottom of the three-dimensional truss 7 is arranged so as to be placed on the upper part of the triangular lattice frame 2, and the horizontal member 5 positioned at the bottom and the triangular lattice frame 2 are fastened by the binding material 8. To do. An uppermost triangular pyramid unit frame top 9 that is joined to the upper structure 10 is provided at the top of the triangular pyramidal unit frame 6 a located at the uppermost stage of the three-dimensional truss 7 .

Referring to FIG. 4, the inclined member 4 of the triangular pyramid-shaped unit frame 6 a located at the uppermost stage is a shaft pipe formed by screwing the upper and lower outer diameter pipes 11 through the inner diameter pipe 12. Become. The upper part is hinge-joined to the uppermost triangular pyramid-shaped unit frame top 9 and the lower part is joined to the triangular pyramid-shaped unit frame 6 located below the uppermost triangular pyramid-shaped unit frame 6a. By turning the pipe 12 up and down with a reverse screw, the inclined member 4 is expanded and contracted by the rotation of the inner diameter pipe 12 to adjust the height of the top triangular pyramid unit frame top portion 9 to cope with the settlement of the foundation. And

  Referring to FIG. 3, a damper-equipped inner diameter pipe 19 is used as the inner diameter pipe 12 by dividing the inner diameter pipe 12 vertically and connecting and integrating the upper inner diameter pipe 12 a and the lower inner diameter pipe 12 b with a damper 18 such as an oil damper. To attenuate the seismic energy.

Referring to FIG. 4, the uppermost triangular pyramidal unit frame top portion 9 is made of a plate material such as a disk, and an upward convex portion whose upper end forms a partial spherical shape is formed at the center of the upper surface. Bolt holes 14 are formed, a partial spherical engraving is formed around the bolt holes 14 on the lower surface side of the plate material, and a disk or the like is provided at the center of the back surface of the column base 15 of the upper structure. A plate material of the same shape as a partial spherical shape of the upward convex portion is formed at the center of the lower surface of the plate material, and a bolt hole of the same diameter is opened at the same position as the bolt hole 14 around the engraving. A partial spherical engraving is formed around the bolt hole on the upper surface side of the plate material, and both are overlapped so as to leave apart from the central portion of the plate material such as a disk, and the partial spherical engraved around the bolt hole 14 Part spherical washer that fits into Both plate materials are fixed with bolts 16 having a narrower diameter than the bolt holes 14 through 17 to adjust the standing of the upper structure.

  The triangular block may be a quadrangular block, the triangular lattice frame may be a lattice frame, and the trigonal pyramid unit frame may be a quadrangular pyramid unit frame.

Referring to FIGS. 1, 2 and 8 to 14, in the earth anchor 20 for preventing movement of the assembly foundation against an external force such as wind, the tip portion has a Y-shaped cross section in plan view. The threaded portion 21 is threaded, and a Y-shaped pillar 23 having a Y-shaped cross section in plan view is integrally processed or joined thereon. Three blades 24 are formed on the Y-shaped column 23, and the lower portion is formed in a U-shape so that the lower portion of the Y-shaped column 23 is sandwiched. A portion corresponding to the U-shaped vertical portion of the blade is substantially parallel to the outside of the Y-pillar 23 and spreads in an arc shape around the Y-column core as the upper part goes upward. It is constructed to be slightly away from the outer end of the pillar 23. The part corresponding to the U-shaped horizontal part is made to move away from the Y-shaped pillar core as it goes upward. A steel wire 27 is tightly coupled to the upper portion of the Y-shaped column 23, the steel wire 27 is passed through the shaft tube 26, the upper portion of the Y-shaped column 23 is covered with the shaft tube 26, and the shaft tube 26 and the Y-shaped column 23 are Three claw holes 28 are formed on the upper surface of the Y-shaped column 23 so that it can be rotationally linked and vertically detached. Three claws 29 having the same diameter as the claw hole 28 are attached to the shaft tube 26 at the same position as the claw hole 28, and the claw is inserted into the claw hole and joined. The shaft tube 26 is rotated using a machine such as a small and light boring machine to penetrate to a predetermined depth, and then the shaft tube 26 is raised to remove the claw 29 of the shaft tube 26 from the claw hole 28, and the shaft tube is lowered. The shaft tube 26 is rotated around the Y-shaped column 23 so that the claw 29 of the shaft tube 26 does not contact the Y-shaped column 23 even when the shaft tube 26 is returned. Pressure is applied to the shaft tube 26 to push open the blades 24, and then the shaft tube 26 is removed. A predetermined tensile force is applied to the steel wire 27, and a load applied to the blade 24 is received by a blade stopper 31 and a pin bolt 25 that are attached or integrally processed to the lower end portion on the outer side of the Y-shaped column 23 and the lower end portion on the inner side of the Y-shaped column 23. The steel wire 27 is connected to the ground by being fastened at three or more locations to the assembly foundation according to claim 1, 2, 3 or 4, and at least four locations to the assembly foundation according to claim 5.

The Y-shaped cone 21 having a Y- shaped cross section in plan view is an I-shaped cone having a I- shaped cross section in plan view, and the Y-shaped column 23 having a Y- shaped cross section in plan view is represented by an I- shaped cross section. The three blades 24 may be replaced by two blades on the I-shaped column.

The Y-cone 21 a plan view cross-section in which the Y-shaped in cross cone a plan view cross section is a cruciform, said Y-shaped pillar 23 a plan view cross-section in which the Y-shaped a plan sectional view cross It is also possible to change the three blades into four blades on the crossed pillar.

In JP-2002-371625 and Japanese Patent Application No. 2005-371313 (2006 September 5 patent assessment), and continuously provided a 3 pyramidal units Frame of 3 groups, proposed artificial ground of about 200 meters ² for housing did. In this case, the load applied to one foundation is about 20 t. If the earth bearing capacity is 5t, the area of the base of the foundation is required to be about 4 m ² or more. It is not easy to assemble such a foundation manually on a slope such as Yamano without using heavy machinery.

FIG. 1 shows a plan view of the foundation. If one side of the triangle serving as the base is 3 m, a base of about 4 m ² can be obtained. According to the figure, the maximum length of one shaft tube is 1.5 m. If STK400φ114.3 × 6.0 is used for the shaft tube, its weight is 24 kg. If a concrete block is used for the block laid on the bottom of the root, the thickness is 10 cm and the weight is 26 kg. Therefore, this foundation can be assembled and disassembled by human power.

  Even if the foundation of the present invention sinks, the height of the upper end of the foundation receiving the superstructure can be adjusted. Therefore, by allowing the sinking, the foundation of FIG. Can do. In addition, the size of the foundation can be minimized.

  The trigonal pyramid-shaped unit frame is easy to assemble and disassemble because the shaft member, the hinged pin bolt and the joining member fitted with the tightening nut are hinge-joined by one pin bolt. Moreover, since it is hinge joining, the kind of joining member can also be reduced. Therefore, it is easy to use stock → assembly → disassembly → stock circulation.

  We have proposed a seismic isolation foundation by storing a damper such as an oil damper in the inclined member of a triangular pyramid unit frame. This trigonal pyramid unit frame with seismic isolation device can be used for general buildings by placing it under the column base of general RC buildings.

  The level adjusting device at the upper end of the foundation can easily adjust the standing of the superstructure. This can also be used alone for general buildings.

  The earth anchor of the present invention may be a small and lightweight boring machine for geological surveys (can be carried on slopes such as mountains without roads) for penetration. It is possible to apply a tensile force with a chain block or the like by assembling a triangular pyramid unit frame (the lower chord material may be omitted). No grout injection is required. Therefore, it does not hurt the natural environment.

  All that remains in the ground is the tension material, the blades and their mounting members. To remove them, increase the tensile force. (If the pin bolt breaks first, the blades will remain in the ground.)

  Hereinafter, the present invention will be described based on illustrated embodiments. FIG. 1 is a plan view of the basis of the present invention, FIG. 2 is a cross-sectional view taken along the line aa of FIG. FIG. 4 is a partially enlarged view of FIG. It is an Example of the assembly foundation in slopes, such as Yamano. Excavation of the topsoil, a horizontal root cut bottom is made, and a triangular block 1 of a size obtained by dividing the planar size of the foundation to be constructed is spread over it, which is sufficiently strong and durable. On this, the triangular lattice frame 2 is placed, and the frame and the block are fastened with bolts 3.

A three-dimensional truss 7 is constructed by connecting one or a plurality of triangular pyramid unit frames 6 formed by joining or integrally processing the inclined member 4 and the horizontal member 5 in the horizontal direction and the height direction. The lower horizontal member 5 is placed on the upper part of the triangular lattice frame 2, and the lower horizontal member 5 and the triangular lattice frame 2 are fastened by the binding material 8, At the top of the triangular pyramid unit frame 6 a located at the uppermost stage of the truss 7, the uppermost triangular pyramid unit frame top 9 to be joined to the upper structure is provided.

  FIG. 4 is an enlarged view of FIG. 2 showing the respective parts and the configuration of the uppermost triangular pyramid unit frame 6a. The inclined member 4 of the uppermost triangular pyramid-shaped unit frame 6 a is an axial tube, and the upper and lower outer diameter tubes 11 are screwed together via the inner diameter tube 12. The upper and lower sides of the inner diameter tube are reverse screws, and the inclined member 4 expands and contracts by the rotation of the inner diameter tube 12. Since the upper part of the inclined member 4 is hinge-joined to the uppermost triangular pyramid unit frame top 9 and the lower part is joined to the triangular pyramid unit frame joining member 13 (hinge bolt and tightening nut), The height of the upper triangular pyramid unit frame top 9 can be adjusted, and the foundation can be settled.

  FIG. 3 is a perspective view of the damper-equipped shaft tube 11d. Seismic energy can be attenuated by dividing the inner diameter pipe 12 into upper and lower parts, and using an inner diameter pipe with a damper formed by connecting and integrating the upper inner diameter pipe 12a and the lower inner diameter pipe 12b with a damper 18 such as an oil damper. it can.

  As shown in FIG. 4, the top triangular pyramid unit frame top 9 has a partial spherical shape at the center, three bolt holes 14 are formed at equal intervals around it, and a partial spherical engraving is formed at the lower end of the hole. It is made of a plate material such as a disc. Similarly, the upper structure column base portion 15 is dug in the same shape as the partial spherical shape in the center of the back surface, and the same shape as the bolt hole 14 around the bolt hole 14 and the partial spherical excavation in the upper end portion of the hole. Keep it. Both are joined apart from the central part of the plate material such as the disk, and the partial spherical washers 17 are sandwiched between upper and lower ends by bolts 16 having a narrower diameter than the bolt holes 14. As described above, the standing of the superstructure can be adjusted by adding and reducing the three bolts.

  The lower triangular pyramidal unit frames 6 may be arranged as shown in FIG. 5 so that the shape of the base base portion is hexagonal.

  The triangular block may be a quadrangular block, the triangular lattice frame may be a lattice frame, and the trigonal pyramid unit frame may be a quadrangular pyramid unit frame. FIG. 6 shows an example.

  In FIG. 1 and FIG. 2, the earth anchor is fastened to the joint portion of the lower part of the upper triangular pyramid unit frame. This is because it is convenient to re-fasten the earth anchor when the foundation sinks. If the inspection tube 30 is placed over the buried portion, it is not necessary to dig out the earth anchor binding portion.

FIG. 10 is a front view of the earth anchor when penetrating, and FIGS. 9, 8, and 7 are an AA sectional view, a BB sectional view, and a CC sectional view, respectively, of FIG. The front end portion is a Y-shaped cone 21 having a Y-shaped cross section in plan view, and is threaded 22 processed on the tip, and the upper portion is a Y-shaped column 23 having a Y-shaped cross section in plan view. Three blades 24 are attached to the Y-shaped column 23. In this case, the three blades 24 are formed so that the lower part is U-shaped and the lower part of the Y-shaped column 23 is sandwiched, and the Y-shaped column 23 is hinged to the Y-shaped column 23 with a pin bolt 25 so as to open approximately 60 degrees. A portion corresponding to the U-shaped vertical portion of the blade 24 is formed so as to be substantially parallel to the outer side of the Y-shaped column 23 and spread in an arc shape with the Y-shaped column core as the center as the upper portion goes upward. And the uppermost part is made to be slightly separated from the outer end of the Y-shaped column. The portion corresponding to the U-shaped horizontal portion of the blade 24 is constructed so as to move away from the Y-shaped column core as it goes upward. A steel wire 27 is tightly coupled to the upper portion of the Y-shaped column 23, the steel wire 27 is passed through the shaft tube 26, and the upper portion of the Y-shaped column 23 is covered with the shaft tube 26. The shaft tube 6 and the Y-shaped column 23 are rotated and interlocked. Three claw holes 28 are opened on the upper surface of the Y-shaped column 23 so that it can be detached. Three claw holes 29 having the same diameter as the claw hole 28 are attached to the shaft tube 26 at the same position as the claw hole 28. deep. The claw 29 is inserted into the claw hole 28 and joined, and the shaft tube 26 is rotated and penetrated to a predetermined depth by using a machine such as a small and light boring machine. Thereafter, the shaft tube 26 is raised by the length of the claw, and the shaft tube claw 29 is removed from the claw hole 28. As shown in FIG. 12, the shaft tube 26 is rotated about the Y-shaped column 23 so that the claw 29 of the shaft tube does not hit the Y-shaped column 23 even when the shaft tube 26 is lowered , and the shaft tube 26 is rotated. Until it hits the blade 24, pressure is applied to the shaft tube 26 to push the blade 24 open. Thereafter, the shaft tube 26 is pulled out, a predetermined tensile force is applied to the steel wire 27, and the load applied to the blade 29 is attached or integrally processed to the Y-column 23 outer lower end and the Y-column 23 inner lower end. 31 and pin bolt 25. The above configuration is a feature.

  Two blades may be attached with the Y-shaped cone as the I-shaped cone and the Y-shaped column as the I-shaped column.

  Four blades may be attached with the Y-shaped pyramid as a cross cone and the Y-shaped column as a cross pillar. The greater the number of blades, the greater the resistance of the ground anchor, but the more severe the excavation becomes. Can be selected according to soil quality.

  When the assembly foundation is fixed to the ground by an earth anchor, the (triangular) lattice frame and the block may be omitted.

Plan view of assembly foundation Aa sectional view of FIG. Shaft tube perspective view with damper Partial enlarged view of FIG. Plan view of another embodiment of assembly foundation Plan view of another embodiment of assembly foundation CC sectional view of FIG. BB sectional view of FIG. AA sectional view of FIG. Front view with earth anchor penetrating In FIG. 7, the shaft tube claw is removed from the Y-shaped column, and the shaft tube is rotated 60 degrees. Plan view of FIG. In the state of FIG. 11, the front view of the earth anchor showing that the shaft tube 26 is press-fitted, the blades 24 are opened, the shaft tube 26 is then pulled out, and a tensile force is applied to the steel wire 27.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Block 2 Triangular lattice frame 3 Bolt 4 Inclined member 5 Horizontal member 6 Triangular pyramid unit frame 7 Three-dimensional truss 8 Tightening material 9 Top stage pyramid unit frame top part 10 Upper structure 11 Axial tube (outer diameter tube)
12 shaft tube (inner diameter tube)
12a Upper inner diameter pipe 12b Lower inner diameter pipe 13 Joint member (bolt with hinge and tightening nut)
14 Bolt hole 15 Superstructure column base 16 Bolt 17 Partial spherical washer 18 Damper 19 Inner diameter pipe with damper 20 Earth anchor 21 Y-shaped cone 22 Threaded 23 Y-shaped column 24 Blade 25 Pin bolt 26 Shaft tube 27 Steel wire 28 Claw hole 29 Claw 30 Inspection tube 31 Stopper

Claims (8)

A steel material with a triangular shape that is obtained by dividing the planar size of the foundation to be built, and a triangular block that is strong and durable, such as a triangular concrete block, is laid down on the root and the section is T-shaped. Placing a triangular lattice-shaped frame configured in a triangular lattice shape in plan view with a bar made of a bar (hereinafter referred to as a T-bar), and placing the vertical portion of the T-bar between the triangular block and the triangular block , the T-bar lateral portions tighten placed on the triangular blocks both of, and tightened with the triangular blocks tightening fittings such as bolts, tilt member and joining the horizontal members to each other or integrally processed 1 group comprising Alternatively, a plurality of triangular pyramid unit frames are connected in the horizontal direction and the height direction to construct a solid truss, and a horizontal member positioned at the bottom of the solid truss is placed on the upper part of the triangular lattice frame. , Horizontal member located at the bottom and triangular lattice frame Was Tightened with Tightened material, most the top of the triangular pyramid-shaped units Frames located in the upper part, the assembly foundation and providing a top 3 pyramidal units rack構頂portion joining the upper structure of the truss.
The inclined member of the triangular pyramid-shaped unit frame located at the uppermost stage is composed of a shaft tube formed by screwing upper and lower outer diameter pipes through an inner diameter pipe, and the upper part is the uppermost triangular pyramid unit. The lower part of the inner diameter tube is hinged to the top of the frame, and the lower part of the inner diameter tube is reverse-screwed to the joint member of the triangular pyramid unit frame located below the uppermost triangular pyramid unit frame. The assembly foundation according to claim 1, wherein the inclination member is expanded and contracted by rotating the pipe to adjust the height of the top of the triangular pyramid unit frame to cope with the settlement of the foundation.
  3. The seismic energy is attenuated by using the inner diameter pipe with a damper formed by dividing the inner diameter pipe vertically and connecting and integrating the upper inner diameter pipe and the lower inner diameter pipe with a damper such as an oil damper. Assembly basis as described. The uppermost triangular pyramid-shaped unit frame top is made of a plate material such as a disk, and an upward convex portion having a partially spherical upper end is formed at the center of the upper surface , and three bolt holes are opened at equal intervals around the upper convex portion . A partially spherical engraving is formed around the bolt hole on the lower surface side of the plate material, and a plate material such as a disk is provided at the center of the back of the column base of the upper structure. An engraving of the same shape as the partial spherical shape of the upward convex portion is formed at the center of the lower surface, and a bolt hole of the same diameter is opened at the same position as the bolt hole around the periphery of the bolt hole on the upper surface side of the plate material. Partial spherical engravings are formed, both are stacked apart so that they are apart from the central part of the plate material such as a disk, and bolt holes are inserted through partial spherical washers that fit into the partial spherical carved around the bolt holes With thinner eye bolts The square of the plate material is fixed, standing claim 1, 2 or 3 assembled basis, wherein the adjusting the superstructure.
  The assembly foundation according to claim 1, 2 or 4, wherein the triangular block is a quadrangular block, the triangular lattice frame is a lattice frame, and the trigonal pyramid unit frame is a quadrangular pyramid unit frame. In the earth anchor for preventing the movement of the assembly foundation against an external force such as wind, the tip is threaded with a Y-shaped cone having a Y-shaped cross section in plan view, on which the cross section in plan view is Y A Y-shaped pillar is integrally processed or joined, and three blades are attached to this Y-shaped pillar, the lower part is U-shaped, and the lower part of the Y-shaped pillar is sandwiched between them. The part corresponding to the U-shaped vertical part of the blade is roughly parallel to the outer side of the Y-shaped pillar, and the upper part goes upward so that it expands in an arc shape around the Y-shaped pillar core. The upper end is designed to be slightly separated from the outer edge of the Y-shaped column, and the portion corresponding to the U-shaped horizontal portion is designed to move away from the Y-shaped column core as it goes upward. The steel wire is passed through the shaft tube, and the upper portion of the Y-shaped column is covered with the shaft tube, Wherein the tubular Y-pillars, rotation interlock, so that it can vertically desorption drilled claw hole of three to Y-pillar top, three of the pawl hole the same diameter as the pawl hole the same position on the shaft tube The claw is attached with the claw facing downward, the claw is inserted into the claw hole and joined, and the shaft tube is rotated using a machine such as a small and light boring machine to penetrate to a predetermined depth. The shaft tube is rotated around the Y-shaped column so that the shaft tube does not hit the Y-shaped column even if the shaft tube is lifted and removed from the claw hole, and the shaft tube is lowered. Until it hits the blade, pressurizing and opening the blade by applying pressure to the shaft tube, then pulling out the shaft tube, applying a predetermined tensile force to the steel wire, The steel wire is received by a blade stopper and a pin bolt attached or integrally processed at the lower end on the inside of the column. 1, 2, 3 or 4 or 3 locations in the assembly foundation according grounding anchor, characterized in that by Tightened least four places on the assembly foundation of claim 5, wherein binding to ground.
The Y-shaped pyramid whose cross section in plan view is Y-shaped, the I-shaped cone whose cross section in plan view is I- shaped, and the Y-shaped column whose cross-section in plan view is Y-shaped . The earth anchor according to claim 6, wherein the I-shaped pillar and the three blades are two blades. The Y-shaped pyramid whose cross section in plan view is Y-shaped, the cross- shaped pyramid whose cross section in plan view is cruciform, the Y-shaped column whose cross-section in plan view is Y-shaped, and the cross-section whose cross-section in plan view is cruciform The earth anchor according to claim 6, wherein the pillar and the three blades are four blades.

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