JP2016194227A - Anchor frame, foundation structure, and construction method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an anchor frame, a foundation structure and a construction method thereof that facilitate inclination adjustment.SOLUTION: An anchor frame 30 is embedded in a foundation block 20 for forming the foundation block 20 connected to a pile 10 driven into a ground 1. The anchor frame includes a tiltable contacting member 35 that may come in contact with the pile 10, and a center of gravity G of the overall anchor frame 30 is located below the contacting member 35. The contacting member 35 may be a spherical member swelling downward. A hanging rod 36 is provided along a central axis line C of the anchor frame 30 in a vertical direction and a balance weight 37 supported at a bottom end of the hanging rod 36 is used, for lowering the center of gravity G.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an anchor frame, a foundation structure, and a construction method thereof.

When building a building such as an industrial building, a foundation structure made of reinforced concrete is formed on the ground. Under the foundation structure, piles such as steel pipe piles are driven into the ground support layer, and the piles support the load of the building.
When forming the foundation structure, after excavating a groove in the ground and driving a steel pipe pile into the bottom, place an anchor frame made of steel, surround it with a formwork, and cast concrete. The procedure of forming a foundation block in which an anchor frame is embedded is frequently used.

As the anchor frame for the foundation, a horizontal steel plate is connected by a plurality of anchor bolts extending in the vertical direction and formed into a rectangular tube as a whole (see Patent Document 1 and Patent Document 2). ).
Prior to the formation of the foundation block, a steel pipe pile is driven into the foundation, and the strength is increased by connecting the pile and the foundation block (Patent Document 3).

JP 2004-36103 A JP 2000-8484 A JP 2005-188041 A

In the conventional foundation structure, the upper surface plate of the anchor frame is exposed on the upper surface of the foundation block, and becomes a portion to which a column base of a building constructed on the foundation is fixed (see Patent Document 2).
In such a structure, it is desirable that the upper surface of the anchor frame is disposed horizontally.
In order to ensure the desired level of horizontality in the anchor frame, when the foundation block is formed, an operation of manually adjusting the inclination of the anchor frame is performed before the concrete is placed.
In particular, when the anchor frame is large and is as tall as a person's height, the adjustment work involved a great deal of labor.

  Specifically, the anchor frame is suspended in the ground groove with a crane, and the anchor frame is inserted between the ground and the anchor while checking the level of the upper surface of the anchor frame while being suspended by the crane. The procedure of adjusting the inclination of the frame is repeated. After the level was obtained, the crane was removed.

Thus, in the construction of the conventional foundation structure, the work is complicated and the work efficiency cannot be improved.
In addition, even if the anchor frame is secured by sufficient adjustment, the anchor frame may be tilted again due to the flow of concrete and may not return to the horizontal state when the concrete is subsequently placed. There was also a problem that the level could not be obtained.

  An object of the present invention is to provide an anchor frame, a foundation structure, and a construction method thereof that can be easily adjusted in inclination.

  The anchor frame of the present invention is an anchor frame embedded in the foundation block in order to form a foundation block connected to a pile driven into the ground, and abutable and tiltable to the pile. And the abutment portion is installed above the position of the center of gravity of the anchor frame.

In the present invention, the anchor frame is suspended on the ground (such as on the bottom surface in the groove formed in the ground) with a crane or the like, and the contact portion of the anchor frame is brought into contact with the end member of the upper end of the pile. .
By this contact, the load of the anchor frame is supported by the ground. Accordingly, the crane or the like used to carry the anchor frame can be removed at this point.

  The contact portion can tilt with respect to the pile, and the tilt of the anchor frame can be easily changed. Here, the contact portion is installed above the center of gravity of the anchor frame. For this reason, the anchor frame is automatically adjusted by gravity so that the position of the center of gravity is directly below the contact portion.

  For this reason, when manufacturing the anchor frame, the top surface of the anchor frame is horizontal and the center of gravity position is directly below the contact portion, that is, the contact portion is directly above the center of gravity position. By installing, the state where the anchor frame is balanced according to gravity (the position of the center of gravity is directly below the contact portion) can automatically obtain a state where the upper surface of the anchor frame is horizontal.

Therefore, according to the present invention, it is possible to easily adjust the inclination of the anchor frame for leveling the upper surface.
When installing the abutment portion above the center of gravity, a balance weight is provided at the bottom of the anchor frame to lower the center of gravity position of the anchor frame, so that the degree of freedom of installation of the abutment portion in the anchor frame can be expanded. .

In the anchor frame of the present invention, the contact portion can be a spherical member.
In this invention, for example, if the upper surface of the pile is a flat plate, the spherical member that is convex downward contacts the upper surface of the pile at one point. The abutting portion rolls on the spherical surface, so that the abutting portion can tilt in any direction.

In the anchor frame of the present invention, the contact portion may have a structure in which two members having a cylindrical surface are overlapped in the crossing direction.
In the present invention, for example, if the upper surface of the pile is a flat plate or the like, the structure in which two members having a cylindrical surface convex downward are stacked in the intersecting direction can be tilted in each member, By tilting each tilting central axis, tilting in any direction is possible.

In the anchor frame of the present invention, the contact portion can be a conical member.
In the present invention, for example, if the upper surface of the pile is a flat plate, the conical member convex downward contacts the plate on the upper surface of the pile at one point, and this point is the center. Can be tilted.

  In addition, in the anchor frame of the present invention, on the upper surface of the pile, a spherical member that is convex upward, a structure in which two members having a cylindrical surface that is convex upward are stacked in an intersecting direction, Any of the conical members formed may be formed, and the contact portion of the anchor frame may be a flat plate.

  In the anchor frame of the present invention, it is preferable that the anchor frame includes a suspension rod disposed along the vertical center axis of the anchor frame and a balance weight supported by a lower end of the suspension rod.

In the present invention, the distance from the contact portion can be secured by the suspension rod, and the center of gravity position of the anchor frame can be disposed sufficiently downward by the balance weight. Can be activated.
At this time, the suspension rod can be inserted into the pile so as to have a sufficient length while avoiding interference with the surroundings.

  Note that the balance weight is not limited to the center of the anchor frame, but a plurality of the balance weights are arranged around the center of the anchor frame, and the center of gravity is not limited to the position immediately below the contact portion on the center axis of the anchor frame. Such a plurality of balance weights are not limited to those supported by the suspension rod, but may be those arranged in the circumferential direction at the lower end of the shaft set of the anchor frame.

The foundation structure of the present invention is a foundation structure having a pile driven into the ground and a foundation block connected to the pile, and an anchor frame is embedded in the foundation block, and the anchor frame is connected to the pile. There is a contact portion that can contact and tilt, and the contact portion is disposed above the center of gravity of the anchor frame.
In the present invention, the effects as described in the anchor frame of the present invention described above can be obtained.

  In the foundation structure of the present invention, the pile is a steel pipe pile, and includes a suspension rod disposed along a vertical center axis of the anchor frame, and a balance weight supported by a lower end of the suspension rod. The suspension rod and the balance weight are preferably inserted from the upper end of the pile to the inside.

  In the present invention, by inserting the suspension rod into the pile, interference with the surroundings can be avoided even if the suspension rod is lengthened. Therefore, by using the long suspension rod and the balance weight supported by the rod, the automatic posture adjustment by the above-described gravity can be effectively performed.

The construction method of a foundation structure of the present invention is a construction method of a foundation structure having a pile driven into the ground and a foundation block connected to the pile, and the anchor frame embedded in the foundation block includes A contact portion that can contact and tilt is provided on the pile, the contact portion is installed above the center of gravity of the anchor frame, and the anchor frame is loaded onto the pile driven into the ground. Then, the abutting part is brought into contact with the pile, the anchor frame is in a state where the abutting part is suspended at the upper end of the pile, and concrete is placed around the anchor frame in this state. The basic block is formed.
In the present invention, the effects as described in the anchor frame of the present invention described above can be obtained.

  In the method for constructing a foundation structure according to the present invention, the pile is a steel pipe pile, and is supported on the anchor frame along a vertical axis of the anchor frame along a vertical center axis, and supported by a lower end of the suspension rod. The balance frame is provided, and after the anchor frame is carried onto the pile, the suspension rod and the balance weight are introduced from the upper end of the pile to the inside, and mortar is injected into the pile. It is preferable that the suspension rod and the balance weight are fixed to the inner surface of the pile.

  In the present invention, as described above, the above-described automatic posture adjustment by gravity can be effectively performed by using the long suspension rod and the balance weight supported by the rod. Furthermore, by injecting mortar into the inside of the pile, the lower end side of the hanging rod and the balance weight can be fixed to the pile, which can prevent inconveniences such as resonance with external vibration. it can.

  According to the present invention, it is possible to adjust the inclination by using gravity with the balance weight, and thereby it is possible to provide an anchor frame and a foundation structure that can be adjusted easily.

Sectional drawing which shows the basic structure of 1st Embodiment of this invention. Sectional drawing which shows the anchor frame of the said 1st Embodiment. The expanded sectional view which shows the contact part of the said 1st Embodiment. Sectional drawing which shows the anchor frame of 2nd Embodiment of this invention. The expansion perspective view which shows the contact part of the said 2nd Embodiment. Sectional drawing which shows the anchor frame of 3rd Embodiment of this invention. The expanded sectional view which shows the contact part of the said 3rd Embodiment. Sectional drawing which shows the anchor frame of 4th Embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
1 to 3 show a first embodiment of the present invention.
In FIG. 1, a groove 2 is excavated in the ground 1, and a base structure 5 for supporting a column base 4 of a building is formed on a bottom surface 3 thereof.
The foundation structure 5 includes a pile 10 driven into the ground 1, a foundation block 20 connected to the pile 10, and an anchor frame 30 embedded in the foundation block 20.

The pile 10 is a steel pipe pile using a steel pipe 11, and the steel pipe 11 is driven from the center of the bottom surface 3 to the support layer in the ground 1.
The upper end opening of the pile 10 is sealed with a flat end member 12. An insertion hole 13 is formed at the center of the end member 12, and an injection hole 14 is formed near the upper end of the steel pipe 11. The insertion hole 13 and the injection hole 14 will be described later.

  The foundation block 20 is a concrete block formed by installing a formwork 21 on the bottom surface 3 so as to surround the pile 10 and placing concrete on the inside thereof. The formwork 21 is removed after the concrete molding, and only the molded concrete becomes the foundation block 20.

[Anchor frame]
As shown in FIG. 2, the anchor frame 30 is formed into a substantially prismatic shape by an upper surface plate 31, an intermediate plate 32, a plurality of anchor bolts 33 and a frame post 34. 36 and a balance weight 37.

  The upper surface plate 31 and the intermediate plate 32 are formed in a rectangular plane, are arranged parallel to each other at a predetermined interval, and are connected to each other by a plurality of anchor bolts 33 and a frame post 34 that extend in the intersecting direction.

  The anchor bolt 33 is installed in the inner region of the upper surface plate 31 and the intermediate plate 32. The upper end of the anchor bolt 33 is inserted into the upper surface plate 31, and the lower end is fastened and fixed to the intermediate plate 32 with a lock nut. A nut 331 for fixing the column base 4 to the upper surface side of the upper surface plate 31 is screwed to the upper end of the anchor bolt 33.

  The frame post 34 is disposed on the outer peripheral portion of the upper surface plate 31 and the intermediate plate 32. The upper end of the frame post 34 is fixed to the outer periphery of the upper surface plate 31, and the intermediate part is fixed to the outer periphery of the intermediate plate 32. The lower end of the frame post 34 extends downward from the intermediate plate 32. When the frame post 34 is carried into the bottom surface 3 to be embedded in the foundation block 20, the lower end of the frame post 34 is disposed in the vicinity of the bottom surface 3.

  The suspension rod 36 is disposed along the central axis C of the anchor frame 30. The suspension rod 36 is suspended and fastened to the intermediate plate 32 with two nuts at the upper end, extends downward through the center of the contact member 35, and passes through the insertion hole 13 of the end member 12 of the pile 10. It is inserted into the steel pipe 11.

A balance weight 37 is supported at the lower end of the suspension rod 36.
The balance weight 37 is used to lower the gravity center position G of the anchor frame 30 to a sufficiently low position. Specifically, a weight corresponding to the total weight from the upper surface plate 31 of the anchor frame 30 to the suspension rod 36 is set as the balance weight 37. Accordingly, the center of gravity position G is set at a position below the contact member 35 in the middle of the hanging rod 36.

  When the anchor frame 30 is manufactured, the center of gravity position G is directly below the contact member 35 in a state where the upper surface plate 31 of the anchor frame 30 is horizontal, that is, the contact member 35 is positioned at the center of gravity position G. The weight of each part of the anchor frame 30 including the balance weight 37 is adjusted so as to be directly above.

A seal member 38 is attached around the balance weight 37.
The seal member 38 is formed by winding a tape made of a flexible material such as polyurethane foam around the balance weight 37, for example. The outer circumferential surface of the balance weight 37 and the inner circumferential surface of the steel pipe 11 are sealed over the entire circumference while maintaining a constant spacing over the entire circumference by the interposition of the seal member 38.

The abutting member 35 is a steel member formed in a downwardly convex spherical shape, and is fixed to the frame post 34 at the periphery, and usually on the upper surface of the end member 12 of the pile 10 at the central portion which is the lowest end. Abutted.
Here, the anchor frame 30 is supported by the pile 10 through the contact portion between the contact member 35 and the upper surface of the end member 12. Therefore, the contact between the contact member 35 and the upper surface of the end member 12 is always maintained by the weight of the anchor frame 30.
On the other hand, the contact member 35 and the upper surface of the end member 12 can roll with each other when the anchor frame 30 is tilted. That is, the contact member 35 can be tilted with respect to the upper surface of the end member 12 while maintaining the contact.

In FIG. 3, what is indicated by a solid line is a state in which the anchor frame 30 is tilted.
When the anchor frame 30 is tilted, the contact member 35 and the end member 12 contact each other at the position Rs, the suspension rod 36 also tilts along the central axis Cs, and the center of gravity position Gs of the anchor frame 30 is the contact member 35. And the position Rs where the end member 12 abuts greatly.

  In this state, a gravity force acting on the gravity center position Gs is generated in a direction (inclined direction) intersecting the central axis Cs. Accordingly, the anchor frame 30 is not stabilized in this state, and the anchor frame 30 is corrected in a direction in which the inclination is eliminated by the above-described component force.

In FIG. 3, what is indicated by a two-dot chain line is a state in which the anchor frame 30 is stable.
As described above, when the anchor frame 30 is tilted, a force is generated by gravity to return the center of gravity position Gs on the center axis Cs to the center of gravity position G on the center axis C along the vertical direction. By this force, the anchor frame 30 and the suspension rod 36 are returned to the upright state indicated by the two-dot chain line. Then, the abutting member 35 is returned to a state where it abuts with the end member 12 at the position R (a state where the outer periphery of the insertion hole 13 and the spherical surface of the abutting member 35 are in contact with the entire circumference), and the anchor frame 30 is stable in this state. To do.

  Thus, in the state where the anchor frame 30 is in contact with the end member 12 of the pile 10 by the contact member 35 and is supported by the load, the anchor frame 30 is corrected and stabilized by gravity. This is because the center of gravity G of the anchor frame 30 is disposed sufficiently below the contact position between the contact member 35 and the end member 12 by the balance weight 37 and the suspension rod 36 described above.

[Construction procedure for foundation structure]
The foundation structure 5 using the anchor frame 30 described above is constructed by the following procedure.
As shown in FIG. 2, first, a groove 2 is excavated in the ground 1 of a construction site, and a steel pipe 11 to be a pile 10 is driven into the bottom surface 3 thereof.
At this time, the upper end of the pile 10 is projected from the bottom surface 3 to a predetermined height. Moreover, the end member 12 at the upper end of the pile 10 is removed.

  Next, the anchor frame 30 manufactured separately is suspended in the groove 2 with a crane or the like, and is brought close to the pile 10 from above. Then, the anchor frame 30 is gradually lowered while the suspension rod 36 and the balance weight 37 are inserted from the upper end of the pile 10 into the inside.

  When the contact member 35 of the anchor frame 30 approaches the upper end of the pile 10, the insertion hole 13 of the end member 12 is inserted into the suspension rod 36 and the end member 12 is fixed to the upper end of the pile 10. In order to perform this insertion, it is preferable that the insertion hole 13 has a slit shape cut from the outer periphery of the end member 12 to the center. Alternatively, the suspension rod 36 may be temporarily detached from the anchor frame 30 in order to be inserted into the insertion hole 13 of the end member 12. Or you may incorporate in the anchor frame 30 side in the state which inserted the end member 12 in the hanging rod 36. FIG.

Thereafter, by further lowering the anchor frame 30, the contact member 35 contacts the end member 12, and the load of the anchor frame 30 is applied to the pile 10 via the contact portion between the contact member 35 and the end member 12. It will be in a burdened state.
In this state, the above-described automatic adjustment of the inclination due to gravity is performed, and the anchor frame 30 is maintained in an intended stable state. An operator may assist the automatic adjustment of the inclination to function normally by, for example, slightly shaking the anchor frame 30.
Furthermore, after confirming the attitude of the anchor frame 30 using a level or the like, if necessary, a leveling is performed with a spacer interposed between the frame post 34 and the bottom surface 3.

When the level of the anchor frame 30 is ensured, the mortar 39 is injected from the injection hole 14 of the pile 10. The injected mortar 39 does not flow down any further because the space between the balance weight 37 and the steel pipe 11 is sealed with the seal member 38. Then, as shown in FIG. 1, it stays on the balance weight 37 and solidifies.
With such a mortar 39, the balance weight 37 and the steel pipe 11 are fixed, and thereafter the tilt of the anchor frame 30 is suppressed.

  In addition, as a means for fixing the anchor frame 30 in the current posture, in addition to fixing with the mortar 39, fixing the frame post 34 and the bottom surface 3 or welding the contact member 35 and the end member 12 or the like. You may go. By such fixing, it is possible to prevent the posture from fluctuating when the concrete is subsequently placed.

  As shown in FIG. 1, when the anchor frame 30 is fixed, the crane or the like used for hanging is removed, and the mold 21 is installed around the anchor frame 30. Then, concrete 22 is placed inside the mold 21, and the upper end of the pile 10 and the anchor frame 30 are wrapped with the concrete 22. When the concrete 22 can be placed up to the height of the upper surface plate 31 of the anchor frame 30, curing for solidifying the concrete 22 is performed in that state.

After the predetermined time has elapsed, when the concrete 22 is sufficiently solidified, the foundation block 20 that is connected to the pile 10 and has the anchor frame 30 embedded therein is formed.
If the foundation structure 5 is formed by the pile 10 and the foundation block 20, the column base 4 of a building can be fixed to the upper surface.

  The upper surface plate 31 of the anchor frame 30, the upper end of the anchor bolt 33, and the nut 331 are exposed on the upper surface of the foundation block 20. When joining the column base 4, first, the column base 4 is disposed above the foundation block 20, lowered, joined to the upper surface plate 31, and fastened and fixed by the nut 331.

At the time of installation, the nut 331 is in direct contact with the top plate 31 as shown in FIG. When fixing the column base 4, the nut 331 is once loosened and removed from the anchor bolt 33, and the upper end of the anchor bolt 33 is inserted into the hole of the fixing plate 41 of the column base 4 as shown in FIG. Tighten 331 again.
Thereby, the fixing plate 41 of the column base 4 is fastened and fixed to the upper surface plate 31, and the column base 4 is fixed to the foundation block 20.

  By the above procedure, the foundation structure 5 which becomes the foundation of the column base 4 can be constructed on the bottom surface 3 in the groove 2 of the ground 1. In the foundation structure 5, installation work including posture adjustment of the anchor frame 30 embedded in the foundation block 20 can be easily performed based on the present invention.

[Effects of First Embodiment]
According to this embodiment, the anchor frame 30 is suspended on the bottom surface 3 in the groove 2 formed in the ground 1 with a crane or the like, and the contact member 35 of the anchor frame 30 and the end member 12 at the upper end of the pile 10 are , The load of the anchor frame 30 can be supported on the ground 1. Accordingly, the crane or the like used to carry the anchor frame 30 can be removed at this point.

  The contact member 35 can be tilted with respect to the pile 10, and the tilt of the anchor frame 30 can be easily changed. Here, the contact member 35 is installed above the center of gravity G of the anchor frame 30 as a whole. For this reason, the anchor frame 30 is automatically adjusted by gravity so that the gravity center position G is directly below the contact member 35.

  When the anchor frame 30 is manufactured, in a state where the anchor frame 30 is balanced according to gravity, that is, in a state where the gravity center position G is directly below the contact member 35, the upper surface plate 31 of the anchor frame 30 is automatically in a horizontal state. It is adjusted to obtain. For this reason, the upper surface plate 31 of the anchor frame 30 supported by the pile 10 is automatically leveled by the above-described automatic adjustment by gravity. As a result, it is possible to easily adjust the inclination of the anchor frame for leveling the upper surface.

  In the present embodiment, when the contact member 35 is installed above the center of gravity position G, the balance weight 37 is provided below the anchor frame 30 so that the center of gravity position G of the anchor frame 30 is sufficiently lowered. 35 degree of freedom of installation can be expanded. In particular, in this embodiment, the contact member 35 can be installed at a relatively lower position of the anchor frame 30, at a position close to the bottom surface 3 in the installed state, and the amount of protrusion from the bottom surface 3 at the upper end of the pile 10 is small. But it can be applied.

In the present embodiment, since the spherical contact member 35 that is convex downward is used as the contact portion of the present invention, the contact member is in contact with the end member 12 installed at the upper end of the pile 10 at one point. Can do. Strictly speaking, the spherical surface of the contact member 35 may be in contact with the entire periphery of the peripheral edge of the insertion hole 13 formed in the end member 12. In this case, the center of gravity position G is directly below the contact member 35. It is in a balanced state and can be regarded as one point.
The abutting point rolls on the spherical surface of the abutting member 35 (and the upper surface of the abutting end member 12), so that the abutting member 35 can tilt in any direction. Therefore, the contact member 35 can provide a free tilting function of the anchor frame 30 with a simple structure.

In the present embodiment, the suspension rod 36 disposed along the central axis C in the vertical direction of the anchor frame 30 is provided, and the balance weight 37 is supported on the lower end of the suspension rod 36. For this reason, the distance from the contact member 35 (the point where the load is supported by contacting the pile 10) can be secured by the suspension rod 36, and the effect of lowering the center of gravity position G by the balance weight 37 is enhanced. The effect of automatic posture adjustment by gravity can be made effective.
Furthermore, the suspension rod 36 can be made into a sufficient length while avoiding interference with the surroundings by being inserted into the steel pipe 11 of the pile 10.

  In this embodiment, after inserting the suspension rod 36 and the balance weight 37 into the pile 10, the lower end side of the suspension rod 36 and the balance weight 37 are attached to the pile 10 by injecting mortar into the pile 10. It can be fixed, and inconveniences such as resonating with external vibration can be prevented.

[Second Embodiment]
4 and 5 show a second embodiment of the present invention.
In FIG. 4, the pile 10, the foundation block 20, and the anchor frame 30 </ b> A constituting the foundation structure 5 are basically the same as those in the first embodiment described above. Therefore, the difference will be mainly described below.

In the anchor frame 30 of the first embodiment, the abutting member 35 (see FIG. 1 or 2) having a downwardly convex spherical shape is used as the abutting portion.
On the other hand, as shown in FIGS. 4 and 5, in the anchor frame 30 </ b> A of the present embodiment, the two contact members 351 and 352 having a cylindrical surface that protrudes downward are provided in the cross direction as the contact portions. A stacked structure is used.

  4 and 5, the pile 10 has an end member 12 at the upper end of the steel pipe 11, and an insertion hole 13 is formed in the end member 12. The suspension rod 36 of the anchor frame 30 </ b> A is disposed along the central axis C of the anchor frame 30 </ b> A and is inserted into the pile 10 through the insertion hole 13.

The lower contact member 351 is a member that has a cylindrical surface that protrudes downward and is continuous along a horizontal axis A1 that is orthogonal to the center axis C, and an insertion hole 353 is formed at the center thereof. .
The abutting member 351 is placed on the upper surface of the end member 12, and can rotate about the axis A1 by rolling with respect to the upper surface of the end member 12.
The suspension rod 36 is inserted into the insertion hole 353, but is not fixed to each other, and interferes with the suspension rod 36 when the contact member 351 rolls with respect to the end member 12. There is nothing.

The upper contact member 352 is a member that has a cylindrical surface that is continuous along an axis A2 orthogonal to both the center axis C and the axis A1 and has a downwardly convex cylindrical surface, and an insertion hole 354 is formed at the center thereof. Yes.
The contact member 352 is placed on both side edges of the contact member 351 described above, and can rotate about the axis A <b> 2 by rolling with respect to the contact member 351.
The suspension rod 36 is inserted into the insertion hole 354 and fixed to each other.

  As shown in FIG. 1, the above-described upper contact member 352 is fixed to the frame post 34 on both sides and is integrated with the anchor frame 30A. On the other hand, the lower contact member 351 is not fixed to either the anchor frame 30A or the pile 10, and the load of the anchor frame 30A is transmitted via the contact member 352. It is sandwiched between the end member 12.

In the contact portion of the present embodiment, the load of the anchor frame 30A is transmitted to the pile 10 through the contact members 351 and 352 by using the two contact members 351 and 352 having the cylindrical surfaces described above. Thereby, the anchor frame 30 </ b> A can be supported by the pile 10.
In the state in which the anchor frame 30A is supported by the pile 10, the rotation around the axis A1 is possible between the end member 12 and the lower contact member 351, and the lower contact member 351 and the upper contact member 351 can be rotated. The anchor frame 30A can be tilted in an arbitrary direction with respect to the pile 10 by being capable of rotating around the axis A2 between the contact member 352 and being capable of rotating around these two axes. can do.

  The suspension rod 36 is fixed to the contact member 352 (fixed to the anchor frame 30A), but is not fixed to the contact member 351 and the end member 12, and accordingly, The tilting of the anchor frame 30A described above is not hindered.

Also according to this embodiment, the same effect as that of the first embodiment described above can be obtained.
Further, the two abutting members 351 and 352 used as the abutting parts are easier to manufacture than the abutting member 35 of the first embodiment formed in a spherical shape.

[Third Embodiment]
6 and 7 show a third embodiment of the present invention.
In FIG. 6, the pile 10, the foundation block 20, and the anchor frame 30B which comprise the foundation structure 5 are the fundamentally the same structures as 1st Embodiment mentioned above. Therefore, the difference will be mainly described below.

In the anchor frame 30 of the first embodiment, the abutting member 35 (see FIG. 1 or 2) having a downwardly convex spherical shape is used as the abutting portion.
On the other hand, as shown in FIGS. 6 and 7, in the anchor frame 30 </ b> B of the present embodiment, a conical contact member 35 </ b> B that is convex downward is used as the contact portion.

  In the present embodiment, as shown in FIG. 7, the contact member 35 </ b> B has a conical shape, and therefore does not roll with respect to the surface of the end member 12. Instead, the conical surface of the contact member 35 </ b> B slides around the insertion hole 13 of the end member 12.

  That is, in order for the anchor frame 30 </ b> B to tilt with respect to the pile 10, the insertion hole 13 through which the hanging rod 36 passes needs to be larger than the outer diameter of the hanging rod 36. On the other hand, the lower end of the contact member 35B is fixed after the suspension rod 36 is inserted into the through hole. Accordingly, the minimum diameter of the cylindrical surface of the contact member 35B is smaller than that of the insertion hole 13, and a part of the lower end of the contact member 35B enters the insertion hole 13 and comes into contact with the peripheral edge. And the anchor frame 30B can tilt with respect to the pile 10 because the contact part of the cylindrical surface of the contact member 35B and the periphery of the insertion hole 13 slides.

Also according to this embodiment, the same effect as that of the first embodiment described above can be obtained.
However, since the contact member 35 and the end member 12 roll in the first embodiment, the resistance when the anchor frame 30 is tilted is small, whereas in the present embodiment, the contact member 35B and the insertion hole 13 are used. Therefore, the resistance when the anchor frame 30B is tilted is slightly increased.
However, the abutting member 35B used as the abutting portion only needs to have a conical surface shape. For example, the abutting member 35B can be formed by bending a flat steel plate, and is more than the abutting member 35 of the first embodiment formed in a spherical shape. Easy to manufacture.

[Fourth Embodiment]
FIG. 8 shows a fourth embodiment of the present invention.
In FIG. 8, the pile 10, the foundation block 20, and the anchor frame 30C which comprise the foundation structure 5 are the fundamentally the same structures as 1st Embodiment mentioned above. Therefore, the difference will be mainly described below.

In the anchor frame 30 of the first embodiment, the abutting portion (the abutting portion between the abutting member 35 and the end member 12 shown in FIG. 1) is added to be located above the center of gravity G of the entire anchor frame 30. The balance weight 37 was used and was suspended from the lower end of the suspension rod 36.
On the other hand, as shown in FIG. 8, in the anchor frame 30 </ b> C of the present embodiment, the hanging rod 36 is omitted, and the balance weight 37 </ b> C is connected to the lower end of the frame post 34.

  Furthermore, in the anchor frame 30C, the contact member 35 and the end member 12 similar to those in the first embodiment are used as the contact portions, but the intermediate plate 32 is positioned higher than in the first embodiment. The contact member 35 is also fixed at a high position of the anchor frame 30C.

  In the foundation structure 5 using such an anchor frame 30C, the groove 2 formed in the ground 1 is also formed deeper to the extent that the balance weight 37C is connected. The length protruding from 3 is set larger.

Note that the engagement pin 36C is fixed to the contact member 35 instead of the suspension rod 36, and the contact member 35 is detached from the upper end of the pile 10 by being inserted into the insertion hole 13 of the end member 12. Is preventing.
Further, the lower portion of the frame post 34 is connected to each other by a tie bar 34C by the height of the intermediate plate 32, thereby preventing the deformation and the occurrence of vibration.

Also according to this embodiment, the same effect as that of the first embodiment described above can be obtained.
However, the effect by the suspension rod 36 in 1st Embodiment, ie, the effect which can support the balance weight 37 more below, the effect stabilized by fixing with the mortar 39 with respect to the pile 10, etc. are not acquired.
However, in this embodiment, the operation of inserting the hanging rod 36 into the pile 10 is not required, and the balance weight 37C is connected to the tip of the frame post 34, so that the structure can be greatly simplified.

[Modification]
The present invention is not limited to the configuration of each of the embodiments described above, and modifications and the like within the scope that can achieve the object of the present invention are included in the present invention.
For example, the basic configuration of the anchor frame 30 is not limited to the top plate 31, the intermediate plate 32, the anchor bolt 33, and the frame post 34 as described above.
Two or more intermediate plates 32 may be provided, and the upper surface plate 31 or the intermediate plate 32 is not limited to a plate shape, and may be one in which wires are assembled in a planar shape.

In the first embodiment, the spherical contact member 35 is used. However, a pseudo spherical surface is formed by bending two steel belts in an arc shape and overlapping each other in the crossing direction. It may be easier to manufacture than forming a spherical steel surface.
In the second embodiment, the cylindrical contact members 351 and 352 having a curved plate so that the cross section has an arc shape are used. However, these are cylindrical members on one side of a solid member, for example, a steel block. May be formed. Similarly, the spherical contact member 35 of the first embodiment and the conical contact member 35B of the third embodiment may be solid members.

  Further, in each of the above embodiments, spherical, cylindrical, and conical contact members 35, 351, 352, and 35B are installed on the anchor frame 30 side, and the pile 10 side is a flat surface. Alternatively, the anchor frame 30 side may be flat, and the contact members 35, 351, 352, and 35 B may be installed on the end member 12 of the pile 10.

The pile 10 is not limited to a steel pipe pile using the steel pipe 11, but may be a pile using a shaped steel material. At this time, a shape steel having a recess in the cross-sectional shape is used, and the recess is covered with a predetermined length from the upper end of the pile to form a tubular shape, thereby securing the above-described space for introducing the suspension rod 36. You may do it.
Furthermore, each part such as the pile 10 and the contact members 35, 351, and 352 is not limited to steel, and the top plate 31, the intermediate plate 32, the anchor bolt 33, and the frame post 34 are not limited to steel plates or steel bars, and have strength and component costs. Other materials may be used if acceptable.

  INDUSTRIAL APPLICABILITY The present invention can be used as an anchor frame, a foundation structure, and a construction method for constructing a building on the ground.

  DESCRIPTION OF SYMBOLS 1 ... Ground, 10 ... Pile, 11 ... Steel pipe, 12 ... End member, 13 ... Insertion hole, 14 ... Injection hole, 2 ... Groove, 20 ... Foundation block, 21 ... Formwork, 22 ... Concrete, 3 ... Bottom, 30 , 30A, 30B, 30C ... anchor frame, 31 ... top plate, 32 ... intermediate plate, 33 ... anchor bolt, 331 ... nut, 34 ... frame post, 34C ... tie bar, 35, 351, 352, 35B ... contact member, 353, 354 ... insertion hole, 36 ... suspension rod, 36C ... engagement pin, 37, 37C ... balance weight, 38 ... seal member, 39 ... mortar, 4 ... column base, 41 ... fixing plate, 5 ... foundation structure, A1, A2... Axis, C, Cs... Center axis, G, Gs... Center of gravity, R, Rs.

Claims (9)

An anchor frame embedded in the foundation block to form a foundation block connected to a pile driven into the ground,
An anchor frame comprising an abutting portion capable of abutting and tilting on the pile, wherein the abutting portion is disposed above a center of gravity of the anchor frame. The anchor frame according to claim 1,
The abutment portion is a spherical member. The anchor frame according to claim 1,
The abutment portion has a structure in which two members having a cylindrical surface are stacked in an intersecting direction. The anchor frame according to claim 1,
The abutment portion is a conical member. In the anchor frame according to any one of claims 1 to 4,
An anchor frame comprising: a suspension rod disposed along a vertical central axis of the anchor frame; and a balance weight supported by a lower end of the suspension rod. A foundation structure having a pile driven into the ground and a foundation block connected to the pile,
An anchor frame is embedded in the foundation block,
The said anchor frame has a contact part which can contact | abut to the said pile, and can be tilted, and the said contact part is installed above the gravity center position of the said anchor frame, The base structure characterized by the above-mentioned. The basic structure according to claim 6,
The pile is a steel pipe pile;
A suspension rod disposed along the vertical center axis of the anchor frame, and a balance weight supported by a lower end of the suspension rod;
The suspension rod and the balance weight are inserted into the pile from the upper end to the inside. A construction method of a foundation structure having a pile driven into the ground and a foundation block connected to the pile,
The anchor frame embedded in the foundation block is provided with a contact portion that can contact and tilt with the pile, and the contact portion is installed above the center of gravity of the anchor frame,
The anchor frame is carried onto the pile driven into the ground, the contact portion is brought into contact with the pile, and the anchor frame is in a state where the contact portion is suspended by the pile,
In this state, the foundation block is formed by placing concrete around the anchor frame to form the foundation block. In the construction method of the foundation structure according to claim 8,
The pile is a steel pipe pile;
The anchor frame is provided with a suspension rod disposed along the vertical center axis of the anchor frame, and a balance weight supported by a lower end of the suspension rod,
After the anchor frame is carried onto the pile, the suspension rod and the balance weight are introduced from the upper end of the pile to the inside, and mortar is injected into the pile to attach the suspension rod and the balance weight. A method for constructing a foundation structure, wherein the foundation structure is fixed to an inner surface of the pile.

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