JP6515279B2 - Anchor frame, foundation structure and construction method thereof - Google Patents

Description

  The present invention relates to an anchor frame, a foundation structure and a method of constructing the same.

When constructing buildings such as industrial buildings, a foundation made of reinforced concrete is formed on the ground. Under the foundation structure, piles such as steel pipe piles are driven to the ground support layer, and the piles support the load of the building.
When forming a foundation structure, excavate a ditch in the ground and drive a steel pipe pile at the bottom, place an anchor frame made of steel, place it in a formwork and then cast concrete, The procedure of forming the foundation block in which the anchor frame is embedded is often used.

As the anchor frame for the foundation, a horizontal steel plate is connected by a plurality of anchor bolts extending in the longitudinal direction, and it is widely used as a whole formed in a square tube shape (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 also enhanced by connecting the pile and the foundation block (Patent Document 3).

JP 2004-36103 A Unexamined-Japanese-Patent No. 2000-8483 JP, 2005-188041, A

In the conventional foundation structure, the top plate of the anchor frame is exposed to the top surface of the foundation block, and becomes a portion to which a column base of a building to be constructed on the foundation is fixed (see Patent Document 2).
In such a structure, it is desirable that the top surface of the anchor frame be arranged horizontally.
In order to secure the desired level of the anchor frame, when forming the foundation block, the work of manually adjusting the inclination of the anchor frame was performed before the work of placing concrete.
In particular, when the anchor frame is large and as tall as a person, the adjustment work is labor intensive.

  Specifically, the anchor frame is suspended by a crane in a groove of the ground, and while being suspended by the crane, a spacer is inserted between the ground and the anchor while confirming the levelness of the upper surface of the anchor frame The procedure of adjusting the inclination of the frame is repeated. And after the level was obtained, the crane was removed.

As described above, in the construction of the conventional foundation structure, the work is complicated and the work efficiency can not be improved.
In addition, even if the anchor frame is secured horizontally by sufficient adjustment, the anchor frame may tilt again due to the flow of concrete during the subsequent placement of concrete, and may not return to the horizontal state. There is also a problem that the level can not be obtained.

  An object of the present invention is to provide an anchor frame easy to adjust inclination, a foundation structure and a method of constructing the same.

The anchor frame of the present invention is an anchor frame embedded in the foundation block to form a foundation block connected to a pile driven into the ground, the anchor frame being capable of abutting on the pile and embedded in the foundation block Before it is carried out , it has a contact portion which can be tilted with respect to the pile, the contact portion is installed above the center of gravity position of the anchor frame, and the posture of the anchor frame is adjusted. fixed Te characterized Rukoto.

In such an embodiment of the present invention, the anchor frame is suspended by a crane or the like on the ground (such as on the bottom of a groove formed in the ground), and the contact portion of the anchor frame is brought into contact with the end member of the upper end of the pile .
The load of the anchor frame is supported on the ground by this abutment. Therefore, the crane etc. which were used for carrying in of an anchor frame can be removed at this time.

  The abutment is tiltable with respect to the stake, and the tilt of the anchor frame is in an easily changeable state. Here, the contact portion is disposed above the center of gravity of the anchor frame. For this reason, the anchor frame is automatically adjusted by gravity to a state where the center of gravity position is directly below the contact portion.

  Therefore, when manufacturing the anchor frame, with the upper surface of the anchor frame being horizontal, the center of gravity is located immediately below the vertical direction of the contact portion, that is, the contact portion is right above the center of gravity position. By installing the anchor frame, when the anchor frame is balanced according to gravity (the center of gravity is located directly below the contact portion), the upper surface of the anchor frame can be automatically obtained in a horizontal state.

Therefore, according to the present invention, it is possible to easily adjust the inclination of the anchor frame to make the upper surface horizontal.
In addition, when installing a contact part above the gravity center position, the balance weight can be provided in the lower part of an anchor frame, and the installation freedom degree of the contact part in an anchor frame can be expanded by lowering the gravity center position of an anchor frame. .

In the anchor frame of the present invention, the contact portion may be a spherical member.
In the present invention, for example, when the upper surface of the pile is a flat plate or the like, the downwardly convex spherical member abuts on the upper surface of the pile at one point. The contact portion can tilt in any direction by rolling on the spherical surface at the point where the contact is made.

In the anchor frame of the present invention, the contact portion may be formed by overlapping two members having cylindrical surfaces in a cross direction.
In the present invention, for example, if the upper surface of the pile is a flat plate or the like, a structure in which two members having a cylindrical surface convex downward are stacked in the cross direction can be tilted at each member. The respective tilting central axes intersect each other, whereby tilting in any direction is possible.

In the anchor frame of the present invention, the abutment may be a conical member.
In the present invention, for example, if the upper surface of the pile is a flat plate or the like, the downwardly convex conical member abuts against the plate on the upper surface of the pile at one point, and this point is centered Can tilt.

  In the anchor frame of the present invention, on the upper surface of the pile, a spherical member convex upward, a structure in which two members having a cylindrical surface convex upward are overlapped in the cross direction, and convex upward Alternatively, the abutment of the anchor frame may be a flat plate.

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

In the present invention as described above, 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 arranged sufficiently downward by the balance weight. Can be enabled.
At this time, the suspension rod can be made into a sufficient length while avoiding interference with the surroundings by inserting it into the inside of the pile.

  In addition, as a balance weight, it arrange | positions not only on the center axis line of an anchor frame but on the circumference | surroundings, and those gravity centers do not restrict to the position directly under a contact part on the center axis line of an anchor frame. Such a plurality of balance weights are not limited to those supported by the suspension rods, but may be circumferentially arranged at the lower end of the shaft set of the anchor frame, etc.

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 the pile Before being embedded in the foundation block, the abutment portion is provided above the center of gravity of the anchor frame, and the abutment portion is disposed above the center of gravity of the anchor frame; attitude and wherein Rukoto fixed relative to the pile after being adjusted.
In the present invention as described above, 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 has a suspension rod disposed along a vertical central axis of the anchor frame, and a balance weight supported by the lower end of the suspension rod. The suspension rod and the balance weight are preferably inserted into the pile from the upper end thereof.

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

A construction method of a foundation structure according to 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, the anchor frame embedded in the foundation block, Abutment part which can abut against the pile and can be tilted with respect to the pile before being embedded in the foundation block is provided, and the abutment part is installed above the center of gravity of the anchor frame, and the ground The anchor frame is carried onto the pile driven in, and the abutment portion is brought into contact with the pile, and the anchor frame is suspended at the upper end of the pile, state, the said anchor frame and fixed relative to the pile after the attitude of the anchor frame is adjusted, burying the anchor frame and Da設concrete around the anchor frames And forming a serial base block.
In the present invention as described above, the effects as described in the anchor frame of the present invention described above can be obtained.

  In the construction method of the foundation structure of the present invention, the pile is a steel pipe pile, and the anchor frame is provided with a suspension rod disposed along a central axis in the vertical direction of the anchor frame, and supported by the lower end of the suspension rod. And the anchor frame is carried onto the pile, and then the suspension rod and the balance weight are introduced from the upper end of the pile into the interior, and mortar is poured into the pile Preferably, the suspension rod and the balance weight are fixed to the inner surface of the pile.

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

  ADVANTAGE OF THE INVENTION According to this invention, inclination adjustment can be performed using gravity by balance weight, and, thereby, the anchor frame and foundation structure which inclination adjustment is easy can be provided.

Sectional drawing which shows the foundation 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 expanded 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 based on 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 foundation structure 5 for supporting a column base 4 of a building is formed on the bottom surface 3 thereof.
The foundation structure 5 has 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 a central portion of the bottom surface 3 to a support layer in the ground 1.
The upper end opening of the pile 10 is sealed by 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 in the vicinity of the upper end of the steel pipe 11. The insertion holes 13 and the injection holes 14 will be described later.

  The foundation block 20 is a concrete block formed by placing a formwork 21 on the bottom surface 3 so as to surround the pile 10 and placing concrete on the inside thereof. In addition, the formwork 21 is removed after concrete shaping | molding, and only the concrete shape | molded becomes the foundation block 20. As shown in FIG.

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

  The top plate 31 and the middle plate 32 are formed in a flat rectangular shape, arranged parallel to each other at predetermined intervals, and mutually connected by a plurality of crosswise extending anchor bolts 33 and frame posts 34.

  The anchor bolt 33 is installed in the inner area of the top plate 31 and the middle plate 32. The upper end of the anchor bolt 33 is inserted into the upper surface plate 31, and the lower end is fixed to the intermediate plate 32 by 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 into the upper end of the anchor bolt 33.

  The frame post 34 is disposed on the outer peripheral portion of the top plate 31 and the middle plate 32. The upper end of the frame post 34 is fixed to the outer periphery of the top plate 31, and the middle part is fixed to the outer periphery of the intermediate plate 32. The lower end of the frame post 34 extends downwardly from the intermediate plate 32. Then, when it is carried to the bottom surface 3 so as to be embedded in the base 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 with its upper end clamped and fixed to the intermediate plate 32 by two nuts, extends downward through the center of the abutment member 35, and passes through the insertion hole 13 of the end member 12 of the pile 10. It is inserted into the inside of the steel pipe 11.

At the lower end of the suspension rod 36, a balance weight 37 is supported.
The balance weight 37 is used to lower the barycentric position G of the anchor frame 30 to a sufficiently low position. Specifically, the 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. Thereby, the center of gravity position G is set at a position below the contact member 35 in the middle of the suspension rod 36.

  When the anchor frame 30 is manufactured, with the upper surface plate 31 of the anchor frame 30 being horizontal, the contact position of the contact member 35 is directly below the contact member 35 in the vertical direction. The weight of each part of the anchor frame 30 including the balance weight 37 is adjusted so as to be directly above the above.

A seal member 38 is mounted around the balance weight 37.
The seal member 38 is formed, for example, by winding a tape made of a flexible material such as foamed polyurethane around the balance weight 37. The seal member 38 intervenes between the outer peripheral surface of the balance weight 37 and the inner peripheral surface of the steel pipe 11 so that the mutual spacing is maintained constant over the entire circumference and sealed over the entire circumference.

The abutment member 35 is a steel member formed in a downwardly convex spherical shape, fixed to the frame post 34 at its periphery, and on the upper surface of the end member 12 of the pile 10 at a central portion that is usually the lowest end. It is abutted.
Here, the anchor frame 30 supports the entire load on the pile 10 via a contact portion between the contact member 35 and the upper surface of the end member 12. Therefore, due to the weight of the anchor frame 30, the contact between the contact member 35 and the upper surface of the end member 12 is always maintained.
On the other hand, the contact member 35 and the upper surface of the end member 12 can roll relative to each other when the anchor frame 30 is inclined. That is, the contact member 35 can tilt with respect to the upper surface of the end member 12 while maintaining the contact.

In FIG. 3, a solid line indicates that the anchor frame 30 is inclined.
When the anchor frame 30 is inclined, the abutment member 35 and the end member 12 abut at the position Rs, the suspension rod 36 is also inclined along the central axis Cs, and the center of gravity Gs of the anchor frame 30 is the abutment member 35. And the end member 12 deviate greatly from the position Rs where the end member 12 abuts.

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

The anchor frame 30 is in a stable state that is indicated by a two-dot chain line in FIG. 3.
As described above, in a state where the anchor frame 30 is inclined, a force of gravity causes the barycentric position Gs on the central axis Cs to return to the barycentric position G on the central axis C along the vertical direction. By this force, the anchor frame 30 and the suspension rod 36 are returned to the upright state shown by the two-dot chain line. Then, the abutting member 35 is returned to the state in which the end member 12 abuts at the position R (the state in which the outer periphery of the insertion hole 13 and the spherical surface of the abutting member 35 contact all around), and the anchor frame 30 is stable in this state Do.

  As described above, in a state in which the anchor frame 30 is load-supported in contact with the end member 12 of the pile 10 by the abutment member 35, the anchor frame 30 is corrected to a fixed state by gravity and stabilized. 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 of foundation structure]
The foundation structure 5 using the anchor frame 30 described above is constructed in the following procedure.
As shown in FIG. 2, first, the groove 2 is excavated in the ground 1 of the construction site, and the steel pipe 11 serving as the pile 10 is driven into the bottom 3 thereof.
At this time, the upper end of the pile 10 is projected from the bottom surface 3 by a predetermined height. Moreover, the end member 12 of the upper end of the pile 10 is removed.

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

  When the abutment 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, the insertion hole 13 is preferably in the form of a slit cut from the outer periphery of the end member 12 to the center. Alternatively, the suspension rod 36 may be once removed from the anchor frame 30 in order to be inserted into the insertion hole 13 of the end member 12. Alternatively, the end member 12 may be incorporated into the anchor frame 30 in advance while being inserted into the suspension rod 36.

After that, by further lowering the anchor frame 30, the abutment member 35 abuts on the end member 12, and the load of the anchor frame 30 is applied to the pile 10 via the abutment portion between the abutment member 35 and the end member 12. It will be burdened.
In this state, the above-described automatic adjustment of the inclination due to gravity is performed, and the anchor frame 30 is maintained in the desired stable state. The operator may slightly shake the anchor frame 30 or the like to assist the automatic adjustment of the inclination to function properly.
Furthermore, after confirming the posture of the anchor frame 30 using a level etc., if necessary, a spacer is interposed between the frame post 34 and the bottom surface 3 to perform leveling.

Once the anchor frame 30 is horizontal, mortar 39 is injected from the injection hole 14 of the pile 10. Since the injected mortar 39 is sealed by the seal member 38 between the balance weight 37 and the steel pipe 11, it does not flow downward further. Then, as shown in FIG. 1, it stays on the balance weight 37 and solidifies.
The balance weight 37 and the steel pipe 11 are fixed by such mortar 39, and thereafter tilting of the anchor frame 30 is suppressed.

  As means for fixing anchor frame 30 in the current posture, in addition to fixing with mortar 39, fixing frame post 34 and bottom surface 3 or welding abutment member 35 and end member 12 etc. You may go. By such fixing, it is possible to prevent the attitude from being changed at the time of subsequent concrete placement.

  As shown in FIG. 1, when the anchor frame 30 is fixed, the crane or the like used for the suspension is removed, and the mold 21 is installed around the anchor frame 30. Then, concrete 22 is cast inside the formwork 21, and the upper end of the pile 10 and the anchor frame 30 are wrapped with the concrete 22. Once the concrete 22 has been cast to the height of the top plate 31 of the anchor frame 30, curing is performed to solidify the concrete 22 in that state.

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

  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 base block 20. When joining the column base 4, first, the column base 4 is disposed above the base block 20, lowered to be joined to the upper surface plate 31, and fixed by a nut 331.

At the time of installation, as shown in FIG. 2, the nut 331 is in direct contact with the upper surface plate 31. In 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 through the hole of the fixing plate 41 of the column base 4 as shown in FIG. Tighten 331.
As a result, the fixing plate 41 of the column base 4 is tightened and fixed to the upper surface plate 31, and the column base 4 is fixed to the base block 20.

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

[Effect of First Embodiment]
According to the present embodiment, the anchor frame 30 is suspended by the crane or the like on the bottom surface 3 in the groove 2 formed in the ground 1, and the contact member 35 of the anchor frame 30 and the end member 12 of the upper end of the pile 10 The load of the anchor frame 30 can be supported by the ground 1 by bringing the two into contact with each other. Therefore, the crane etc. which were used for carrying in of the anchor frame 30 can be removed at this time.

  The abutment member 35 can tilt relative to the pile 10, and the tilt of the anchor frame 30 can be easily changed. Here, the contact member 35 is disposed above the center of gravity position G of the entire anchor frame 30. For this reason, the anchor frame 30 is automatically adjusted by gravity to a state in which the gravity center position G is directly below the contact member 35.

  When the anchor frame 30 is balanced according to gravity at the time of manufacturing the anchor frame 30, that is, when the center of gravity G is directly below the contact member 35, the upper surface plate 31 of the anchor frame 30 is automatically horizontal. It is adjusted to be obtained. Therefore, in the anchor frame 30 supported by the stake 10, the top plate 31 is automatically made horizontal by the above-described automatic adjustment by gravity. As a result, it is possible to easily adjust the inclination of the anchor frame to make the upper surface horizontal.

  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. It can expand the installation freedom of 35. In particular, in the present embodiment, the abutment member 35 can be installed at a relatively lower position of the anchor frame 30 in a position near the bottom 3 in the installed state, and the protrusion 10 from the bottom 3 of the upper end of the pile 10 is small. But it can be applied.

In the present embodiment, since the downwardly convex spherical contact member 35 is used as the contact portion of the present invention, contact at one point with the end member 12 installed at the upper end of the pile 10 Can. Strictly speaking, the spherical surface of the contact member 35 may come into contact with the entire periphery of the insertion hole 13 formed in the end member 12 in this case, but in this case, the center of gravity G is directly below the contact member 35 It is in a balanced state and can be regarded as one point.
The contact member 35 can tilt in an arbitrary direction by rolling the contact point on the spherical surface of the contact member 35 (and the upper surface of the contact end member 12). Therefore, the abutment 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 vertical central axis C of the anchor frame 30 is provided, and the balance weight 37 is supported at the lower end of the suspension rod 36. For this reason, the distance from the abutment member 35 (the point supported by the pile 10 and supported by the load) can be secured by the suspension rod 36, and the effect of lowering the gravity center position G by the balance weight 37 is enhanced. The effect of automatic attitude adjustment by gravity can be enabled.
Furthermore, the suspension rod 36 can be made into sufficient length, avoiding interference with circumference | surroundings by inserting inside the steel pipe 11 of the pile 10. As shown in FIG.

  In the present embodiment, after the suspension rod 36 and the balance weight 37 are inserted into the pile 10, the lower end side of the suspension rod 36 and the balance weight 37 are inserted into the pile 10 by injecting mortar into the pile 10. It can be fixed, and inconveniences such as resonance due to 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 30A which constitute the foundation structure 5 have basically the same configuration as that of the first embodiment described above. Therefore, the differences will be mainly described below.

In the anchor frame 30 according to the first embodiment, a contact member 35 (see FIG. 1 or FIG. 2) which is formed in a downwardly convex spherical shape is used as the contact portion.
On the other hand, as shown in FIG. 4 and FIG. 5, in the anchor frame 30A of the present embodiment, two abutting members 351, 352 having a cylindrical surface convex downward as the abutting portion in the cross direction The stacked structure is used.

  In FIG. 4 and FIG. 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 30A is disposed along the central axis C of the anchor frame 30A, and is inserted into the interior of the pile 10 through the insertion hole 13.

The lower contact member 351 is a member which is continuous with the horizontal axis A1 orthogonal to the central axis C and has a cylindrical surface convex downward, and an insertion hole 353 is formed at the center of the lower contact member 351. .
The contact member 351 is placed on the upper surface of the end member 12, and can roll around the axis A <b> 1 by rolling on the upper surface of the end member 12.
Although the suspension rods 36 are inserted through the insertion holes 353, they are not fixed to each other, and when the contact member 351 rolls on the end member 12, they interfere with the suspension rod 36. There is nothing to do.

The upper contact member 352 is a member which is continuous along an axis A2 orthogonal to both the central axis C and the axis A1 and has a downwardly convex cylindrical surface, and an insertion hole 354 is formed at the center thereof There is.
The contact member 352 is placed on both side edges of the contact member 351 described above, and can roll around the axis A2 by rolling on the contact member 351.
The suspension rods 36 are inserted into the insertion holes 354 and fixed to each other.

  The above-mentioned upper abutment member 352 is fixed to the frame post 34 on both sides as shown in FIG. 1 and is integrated with the anchor frame 30A. On the other hand, the lower contact member 351 is not fixed to any of the anchor frame 30A and the pile 10, and the load of the anchor frame 30A is transmitted through the contact member 352, thereby It is held between the end members 12.

The load of the anchor frame 30A is transmitted to the pile 10 via the contact members 351, 352 by using the two contact members 351, 352 having the cylindrical surfaces described above in the contact portion of the present embodiment, Thereby, anchor frame 30A can be supported by pile 10.
Then, in a state where the anchor frame 30A is supported by the pile 10, 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 The anchor frame 30A can be tilted in any direction with respect to the pile 10 by being capable of pivoting about the axis A2 with the abutment member 352 and being capable of pivoting about these two axes. can do.

  Although the suspension rod 36 is fixed to the contact member 352 (fixed to the anchor frame 30A), the suspension rod 36 is not fixed to the contact member 351 and the end member 12, and therefore, It does not disturb the tilting of the anchor frame 30A described above.

The same effects as those of the first embodiment described above can also be obtained by such a present embodiment.
Furthermore, the two contact members 351 and 352 used as the contact portions are easier to manufacture than the contact member 35 of the first embodiment formed into 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 constitute the foundation structure 5 have basically the same configuration as the first embodiment described above. Therefore, the differences will be mainly described below.

In the anchor frame 30 according to the first embodiment, a contact member 35 (see FIG. 1 or FIG. 2) which is formed in a downwardly convex spherical shape is used as the contact portion.
On the other hand, as shown in FIGS. 6 and 7, in the anchor frame 30B of the present embodiment, a conical contact member 35B which is convex downward is used as the contact portion.

  In the present embodiment, as shown in FIG. 7, the contact member 35B is conical, and therefore, the surface of the end member 12 is not rolled. Instead of this, the conical surface of the abutment member 35 B slides around the insertion hole 13 of the end member 12.

  That is, in order for the anchor frame 30B to tilt with respect to the pile 10, the insertion hole 13 through which the suspension rod 36 passes needs to be larger than the outer diameter of the suspension 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. Therefore, the minimum diameter of the cylindrical surface of the contact member 35B is smaller than that of the insertion hole 13, and the lower end of the contact member 35B partially enters the insertion hole 13 and contacts the peripheral edge. The anchor frame 30B can be tilted relative to the pile 10 by sliding the contact portion between the cylindrical surface of the contact member 35B and the peripheral edge of the insertion hole 13.

The same effects as those of the first embodiment described above can also be obtained by such a present embodiment.
However, in the first embodiment, since the contact member 35 and the end member 12 roll, the resistance at the time of tilting of the anchor frame 30 is small, while in the present embodiment, the contact member 35B and the insertion hole 13 As a result, the resistance at the time of tilting of the anchor frame 30B is slightly increased.
However, the contact member 35B used as the contact portion may be conical as long as it can be formed by bending a flat steel plate, for example, and can be formed more spherically than the contact member 35 of the first embodiment formed in a spherical shape. It is easy to manufacture.

Fourth Embodiment
A fourth embodiment of the present invention is shown in FIG.
In FIG. 8, the pile 10, the foundation block 20, and the anchor frame 30C that constitute the foundation structure 5 have basically the same configuration as the first embodiment described above. Therefore, the differences will be mainly described below.

In the anchor frame 30 of the first embodiment, in order to set the contact portion (a contact portion between the contact member 35 and the end member 12 shown in FIG. 1) above the center of gravity G of the entire anchor frame 30, The balance weight 37 is used to be suspended at the lower end of the suspension rod 36.
On the other hand, as shown in FIG. 8, in the anchor frame 30C of this embodiment, the suspension rod 36 is omitted, and the balance weight 37C 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 portion, but the intermediate plate 32 is positioned higher than in the first embodiment, The abutment member 35 is also fixed at the 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 as deep as the balance weight 37C is connected, and depending on the height of the contact member 35, the pile 10 also has a bottom surface The length protruding from 3 is set larger.

Note that, instead of the suspension rod 36, the engagement pin 36C is fixed to the contact member 35, 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. To prevent.
Further, the lower part of the frame post 34 is connected to each other by the tie bar 34C by the height of the intermediate plate 32, and the deformation prevention and the occurrence of vibration are prevented.

The same effects as those of the first embodiment described above can also be obtained by such a present embodiment.
However, the effect by the suspension rod 36 in the first embodiment, that is, the effect that the balance weight 37 can be supported further downward, and the effect that it is stabilized by being fixed to the pile 10 with the mortar 39 can not be obtained.
However, in the present embodiment, the operation of inserting the suspension rod 36 into the pile 10 is not necessary, 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 configurations of the above-described embodiments, and modifications and the like within the scope in which the object of the present invention can be achieved 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.
The intermediate plate 32 may be two or more sheets, and the upper surface plate 31 or the intermediate plate 32 is not limited to a plate shape, and may be a plate in which wire rods are assembled in a plane shape.

In the first embodiment, although the spherical contact member 35 is used, two steel belts are curved in an arc shape, and a spherical surface is formed in a pseudo manner by overlapping in the cross direction at each intermediate portion. It can be manufactured more easily than forming a steel spherical surface.
In the second embodiment, the cylindrical contact members 351 and 352 are used in which the plate material is curved so that the cross section becomes an arc shape, but these are solid members, for example, a cylindrical surface on one side of a steel block May be formed. Similarly, the spherical abutment member 35 of the first embodiment and the conical abutment member 35B of the third embodiment may be solid members.

  Furthermore, in the respective embodiments described above, spherical, cylindrical, conical contact members 35, 351, 352, 35B are installed on the anchor frame 30 side, and the pile 10 side is a flat surface, but these are reversed The anchor frame 30 may be flat, and the contact members 35, 351, 352, 35B 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. Under the present circumstances, using the thing which has a crevice in cross-sectional shape as section steel, the introduction space of suspension rod 36 mentioned above is secured by covering this crevice from the upper end of a pile over predetermined length and making it a tube shape. You may do so.
Furthermore, each part such as the pile 10 and the contact members 35, 351, and 352 is not limited to steel, and the upper surface plate 31, the intermediate plate 32, the anchor bolt 33 and the frame post 34 are not limited to steel plate or bar steel, Other materials may be used if acceptable.

  INDUSTRIAL APPLICABILITY The present invention can be used as an anchor frame, a foundation structure, and a method of constructing the same when 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 surface, 30 , 30A, 30B, 30C: anchor frame, 31: upper surface plate, 32: intermediate plate, 33: anchor bolt, 331: nut, 34: frame post, 34C: tie bar, 35, 351, 352, 352, 35B: abutting member, 353, 354 ... insertion hole, 36 ... suspension rod, 36C ... engagement pin, 37, 37C ... balance weight, 38 ... seal member, 39 ... mortar, 4 ... pillar base, 41 ... fixed plate, 5 ... foundation structure, A1, A2 ... axis, C, Cs ... central axis, G, Gs ... center of gravity position, R, Rs ... contact position.

Claims (9)

An anchor frame embedded in the foundation block to form a foundation block connected with a pile driven into the ground,
The abutment has an abutment portion which can abut against the pile and can tilt relative to the pile before being embedded in the foundation block, the abutment being installed above the center of gravity of the anchor frame , the anchor anchor frames attitude frame and wherein Rukoto fixed relative to the pile after being adjusted. In the anchor frame according to claim 1,
The anchor frame according to claim 1, wherein the contact portion is a spherical member. In the anchor frame according to claim 1,
The anchor frame is characterized in that the contact portion has a structure in which two members having cylindrical surfaces are overlapped in a cross direction. In the anchor frame according to claim 1,
The anchor frame is characterized in that the contact portion is a conical member. 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 at 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 base block,
The anchor frame has an abutment portion that can abut against the pile and can tilt relative to the pile before being embedded in the foundation block, and the abutment portion is above the center of gravity of the anchor frame installed, basic structure and orientation of the anchor frame, characterized in Rukoto fixed relative to the pile after being adjusted. In the foundation structure according to claim 6,
The pile is a steel pipe pile,
A suspension rod disposed along a vertical central axis of the anchor frame, and a balance weight supported at a lower end of the suspension rod;
The foundation structure characterized in that the suspension rod and the balance weight are inserted from the upper end of the pile into 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 base block is provided with an abutment portion capable of abutting on the pile and tiltable with respect to the pile before embedding in the base block, the abutment part being formed of the anchor frame Place it above the center of gravity,
The anchor frame is carried in on the pile driven into the ground, and the contact portion is brought into contact with the pile, and the anchor frame is suspended by the pile.
In this state, after the attitude of the anchor frame is adjusted, the anchor frame is fixed to the pile, and concrete is cast around the anchor frame to form the foundation block in which the anchor frame is embedded. How to build a foundation structure characterized by 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 central axis of the anchor frame, and a balance weight supported by the 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, mortar is poured into the pile, and the suspension rod and the balance weight are The construction method of the foundation structure characterized by fixing to the inner surface of the said pile.

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