JP6270763B2 - Building support structure, construction method of building support structure and pile lid - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a building support structure in which a foundation of a building is formed on a pile foundation composed of a plurality of support piles, a construction method thereof, and a pile lid used for them.

  Conventionally, as a method of constructing this type of building support structure, concrete is cast on a pile foundation to form a discarded concrete layer, and after marking the upper surface of the discarded concrete layer, The thing which forms the foundation of a building is known (for example, refer patent document 1).

Japanese Patent Laid-Open No. 11-94540 ([0026], FIG. 2)

  By the way, in general, when a foundation of a building is formed, reinforcement is appropriately performed in consideration of a deviation between the center of a column obtained by inking and the center of a support pile. However, in the construction method of the conventional building support structure described above, the support pile is discarded and covered with a concrete layer and cannot be seen at the time of marking, so the deviation between the center of the column and the center of the support pile must be accurately measured. It was difficult. For this reason, there existed a problem that it was difficult to perform the reinforcement of the foundation of a building appropriately.

  The present invention has been made in view of the above circumstances, and an object thereof is to provide a building support structure capable of appropriately reinforcing the foundation of a building, a construction method thereof, and a pile lid used for them.

  In order to achieve the above object, the invention of claim 1 is characterized in that a pile pile is formed by driving support piles into a plurality of predetermined positions on the ground, and concrete is cast on the pile foundation and discarded. In the construction method of the building support structure in which the concrete layer is formed, the ink is drawn on the upper surface of the discarded concrete layer, and the foundation of the building is formed on the discarded concrete layer, before the discarded concrete layer is formed, A centering member is attached to the upper portion of each support pile so as to be movable up and down on the central axis of the support pile, and the upper ends of the plurality of centering members are aligned at the same height, and the discarded concrete layer is In forming the building support structure, the upper surface of the concrete is aligned with the upper ends of the centering members.

  According to the invention of claim 2, the support pile is formed in a cylindrical shape with an open upper end, the upper end opening of the support pile is closed with a pile lid, and the pile lid is provided with the upper end opening of the support pile. A lid for covering, and a centering bolt as the centering member screwed into a screw hole penetrating the lid, and by attaching the pile lid to the support pile, the support pile is It is a construction method of the building support structure of Claim 1 which attaches a centering member.

  According to a third aspect of the present invention, the pile lid is provided with a fixed leg portion that enters the support pile, and when the pile lid is attached to the support pile, the fixed leg portion is press-fitted and fixed in the support pile. It is the construction method of the building support structure of Claim 2.

  According to a fourth aspect of the present invention, the fixed leg portion hangs down from the lid body and has a smaller diameter than the upper end opening of the support pile, and protrudes outward from the tube portion to the inner peripheral surface of the support pile. It is the construction method of the building support structure of Claim 3 provided with the some fixed piece which contact | abuts.

  The invention according to claim 5 is the construction method for building support structure according to any one of claims 1 to 4, wherein the foundation of the building includes a steel beam as a core material.

  According to a sixth aspect of the present invention, the steel beam is provided with a web plate disposed vertically and a pair of flange plates projecting laterally from both upper and lower ends of the web plate, and the building. In forming the foundation of the steel plate, a connecting metal structure having support legs suspended from the top plate is fixed on the discarded concrete layer, and a steel beam is placed on the top plate, and the pair of flanges The construction of the building support structure according to claim 5, wherein an anchor bolt is passed through the plate and the top plate, and the connecting hardware and the flange plate on the lower side are joined by a fastening nut screwed into the anchor bolt. Is the method.

  The invention according to claim 7 is a pile foundation formed of a plurality of support piles embedded in a plurality of predetermined positions on the ground, a discarded concrete layer formed on the pile foundation, and the discarded concrete layer A building support structure comprising a building foundation formed on the top of each of the support piles, a centering member capable of moving up and down on a central axis of the support pile is attached to the plurality of the cores. It is a building support structure in which the height positions of the upper ends of the projecting members are the same, and the upper ends of the centering members and the upper surface of the discarded concrete layer are disposed flush with each other.

  In the invention according to claim 8, the support pile is formed in a cylindrical shape having an open upper end, the upper end opening of the support pile is closed with a pile lid, and the upper end opening of the support pile is formed on the pile lid. The building support structure according to claim 7, further comprising: a covering cover body; and a centering bolt screwed into a screw hole penetrating the cover body, wherein the centering member is configured by the centering bolt. It is.

  The invention according to claim 9 is the building support structure according to claim 8, wherein the pile lid is provided with a fixed leg portion that is press-fitted and fixed inside the support pile while entering the support pile. is there.

  The invention according to claim 10 is characterized in that the fixed leg portion is suspended from the lid body and has a cylindrical portion having a smaller diameter than the upper end opening of the supporting pile, and projects outward from the cylindrical portion to the inner periphery of the supporting pile. The building support structure according to claim 9, wherein a plurality of fixed pieces that abut the surface are provided.

  The invention of claim 11 is the building support structure according to any one of claims 7 to 10, wherein the foundation of the building comprises a steel beam as a core material.

  The invention according to claim 12 is characterized in that, on the abandoned concrete layer, a connection hardware having a structure in which a support leg is suspended from a top plate is fixed, and the steel beam is arranged vertically, and the web A pair of flange plates projecting laterally from the upper and lower ends of the plate, and placed on the top plate, penetrating the pair of flange plates and the top plate, The building support structure according to claim 11, wherein the building support structure has an anchor bolt into which a tightening nut that joins a connecting hardware and the lower flange plate is screwed.

The invention of claim 13 is a pile lid that closes the upper end opening of the support pile that is driven into the ground and constitutes the pile foundation, and covers the upper end opening of the support pile and is disposed on the central axis of the support pile. A lid body having a screw hole; a centering bolt that is screwed into the screw hole; and a fixed leg portion that is press-fitted and fixed inside the support pile. The fixed leg portion is suspended from the lid body. And a cylindrical portion having a smaller diameter than the upper end opening of the support pile, and a plurality of fixed pieces projecting outward from the cylindrical portion and coming into contact with the inner peripheral surface of the support pile, While being fixed over the entire length in the axial direction, the upper end of the fixed piece communicates with the lid body, and the lower end portion thereof is a pile lid whose bulging amount gradually decreases as the distance from the lid body side increases. .

[Inventions of Claims 1, 5, 7, and 11]
According to the first and seventh aspects of the present invention, since the centering member disposed on the central axis of the support pile is exposed on the upper surface of the discarded concrete layer, the center position of the column obtained by inking and the centering member By measuring the deviation, the deviation between the center of the column and the center of the support pile can be measured. Thereby, it becomes possible to measure the gap between the center of the support pile and the center of the column more accurately than before, and it is possible to reinforce the foundation of the building more appropriately than before. Further, in the present invention, before forming the discarded concrete layer, before forming the discarded concrete layer, the height positions of the upper ends of the centering members attached to each of the plurality of support piles are aligned. Since it is possible to match the upper surface of the concrete with the upper end of the member, it is possible to improve the levelness of the upper surface of the discarded concrete layer. In particular, in the configuration in which the foundation of the building formed on the discarded concrete layer includes the steel beam in the core material as in the inventions of claims 5 and 11, the height is adjusted when the steel beam is installed. Therefore, it becomes possible to form the foundation of a building having a substantially uniform height by increasing the level of the discarded concrete layer.

[Inventions of Claims 2 and 8]
According to the second and eighth aspects of the invention, it is possible to easily adjust the height of the centering member.

[Inventions of Claims 3, 4, 9, 10]
In invention of Claim 3, 9, since it becomes possible to fix a pile cover to a support pile by press-fitting a pair of fixed leg parts inside a support pile, for example, when fixing a pile cover by welding Compared with, it becomes easy to attach the pile lid.

  Here, the fixed leg portion is configured by a pair of plates that are suspended from the lid body, enter into the support pile, and are press-fitted and fixed inside the support pile so as to sandwich the central axis of the support pile. Alternatively, as in the inventions of claims 4 and 10, a cylinder part that hangs down from the lid and has a smaller diameter than the upper end opening of the support pile, and projects outward from the cylinder part to contact the inner peripheral surface of the support pile. The structure which has a some fixed piece may be sufficient. According to the fourth and tenth aspects of the present invention, the fixed leg portion can be stabilized.

[Inventions of claims 6 and 12]
According to the inventions of claims 6 and 12, since the anchor bolt penetrates not only the upper flange plate of the steel beam but also the lower flange plate, it is possible to suppress the displacement of the anchor bolt. In addition, the lower flange plate of the steel beam and the top plate of the connection hardware are joined by a fastening nut that is screwed to the anchor bolt, so the anchor bolt is also used to fix the steel beam and the connection hardware. It becomes possible to do.

[Invention of Claim 13]
According to invention of Claim 13, it becomes possible to attach the centering bolt arrange | positioned on the center axis | shaft of a support pile to a support pile by obstruct | occluding the upper end opening of a support pile with a pile cover. Then, if the centering bolt is discarded and the height is exposed on the upper surface of the concrete layer, the center position of the column and the support pile are measured by measuring the misalignment between the center position of the column obtained by inking and the centering bolt. The deviation from the center can be measured. Thereby, it becomes possible to measure the gap between the center of the support pile and the center of the column more accurately than before, and it is possible to reinforce the foundation of the building more appropriately than before. In addition, according to the present invention, before forming the discarded concrete layer, the height positions of the upper ends of the centering bolts attached to each of the plurality of support piles are aligned, By aligning the upper surface of the concrete with the upper end of the centering bolt, the leveling of the upper surface of the discarded concrete layer can be improved.

Moreover, since it becomes possible to fix a pile lid to a support pile by press-fitting a fixed leg part inside a support pile, for example, compared with the case where a pile lid is fixed by welding, attachment of a pile lid is It becomes easy.

Furthermore, it is a configuration having a cylindrical portion that hangs down from the lid and has a smaller diameter than the upper end opening of the support pile, and a plurality of fixing pieces that protrude outward from the cylindrical portion and abut against the inner peripheral surface of the support pile. Also good. Thereby , stabilization of a fixed leg part is achieved.

Side view of building support structure and building according to one embodiment of the present invention Side cross section of building support structure (A) Side sectional view around the connection hardware, (B) Side sectional view around the steel beam for foundation Side cross-sectional view of support pile and discarded concrete layer (A) Perspective view of pile cover, (B) Plane sectional view of support pile and pile cover Flow chart showing the flow of construction of building support structure (A) Cross section of support pile driven into the ground, (B) Cross section of support pile with attached pile lid (A) Perspective view of pile foundation after excavation, (B) Side sectional view (A) perspective view, (B) side sectional view of abandoned concrete layer Perspective view of abandoned concrete layer after inking Cross section of abandoned concrete layer after inking Perspective view of connected hardware fixed to abandoned concrete layer Perspective view of a steel beam fixed to a connecting hardware Perspective view of building support structure (A) perspective view, (B) plane sectional view of a pile cover according to a modification (A) perspective view, (B) plane sectional view of a pile cover according to a modification

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the building support structure 10 of this embodiment includes a foundation 40 of a building 90 (hereinafter referred to as “building foundation 40”) on a pile foundation 12 composed of a plurality of support piles 11. It has a structure. The building foundation 40 is configured by combining an underground beam 41 having a steel beam 42 as a core material. A foundation 91 is formed on the building foundation 40, and a plurality of pillars 92 are erected on the foundation 91. The building 90 may be a steel frame or a wooden frame.

  The plurality of support piles 11 are driven into a place determined by a pile plan or construction drawing on the ground. Each support pile 11 is driven in until it reaches a hard ground (support layer) (not shown), and the upper end portion of the support pile 11 is disposed below the ground surface GL. The support pile 11 has a cylindrical shape with a bottom end, and the upper end opening 11A of the support pile 11 is closed by a pile lid 20 described later (see FIGS. 7A and 7B). In addition, the support pile 11 is comprised by the small diameter steel pipe pile (JISG3444), for example.

  A discarded concrete layer 15 is formed on the pile foundation 12 (the plurality of support piles 11). The discarded concrete layer 15 has a structure in which strip-shaped concrete layers 15A arranged below the place where the underground beam 41 is installed are joined together (see FIG. 9A). In addition, the width (length in the left-right direction in FIG. 1) of each concrete layer 15A is wider than the width of the underground beam 41 installed thereon.

  As shown in FIG. 2, the underground beam 41 has a structure in which a steel beam 42 is covered with concrete 46. Specifically, the steel beam 42 has an H-shape in which flange plates 44 and 45 project laterally from the upper and lower ends of the vertical web plate 43, and is disposed on the upper surface of the discarded concrete layer 15 through the connecting hardware 50. It is fixed at 15M. And concrete 46 is cast so that the circumference of steel beam 42 and connecting metal fitting 50 may be covered, and underground beam 41 is formed. The underground beam 40 is provided with a wire mesh 47 in parallel with the web plate 43 for preventing cracking of the concrete 46. In the following, the upper flange plate 44 and the lower flange plate 45 in the steel beam 42 are referred to as an upper flange plate 44 and a lower flange plate 45, and are appropriately distinguished.

  As shown in FIGS. 3A and 12, the connecting hardware 50 has a structure in which support legs 52 and 52 are suspended from a top plate 51 on which the steel beam 42 is placed. By fixing to the upper surface 15M of the discarded concrete layer 15, the steel beam 42 is fixed in a state of being floated from the upper surface 15M of the discarded concrete layer 15. Specifically, bolt insertion holes 45A and 51A are formed in the lower flange plate 45 and the top plate 51, and the anchor plate 55 is inserted into the bolt insertion holes 45A and 51A. The steel beam 42 is fixed to the top plate 51 by sandwiching the lower flange plate 45 with the fastening nuts 56, 56.

  As shown in FIG. 3B, the anchor bolt 55 passes through the bolt insertion hole 44 </ b> A that penetrates the upper flange plate 44 and protrudes above the underground beam 41. And the base 91 mentioned above is fixed to the protrusion part of this anchor bolt 55. FIG. Specifically, the foundation 91 is provided with the same H-shaped foundation steel beam 93 as the steel beam 42, and the anchor bolt 55 penetrates the flange plate 94 below the foundation steel beam 93. . Then, by tightening the fastening nut 58 to the anchor bolt 55 from above, the upper flange plate 44 of the steel beam 42 and the lower flange plate 94 of the foundation steel beam 93 are coupled, and the foundation 91 is connected to the underground beam 41. Fixed on top.

  Thus, in this embodiment, since the anchor bolt 55 penetrates not only the upper flange plate 44 of the steel beam 42 but also the lower flange plate 45, the lateral displacement between the upper flange plate 44 and the lower flange plate 45 is suppressed. At the same time, it is possible to suppress the displacement of the anchor bolt 55 in the horizontal direction. Further, since the lower flange plate 44 of the steel beam 42 and the top plate 51 of the connection hardware 50 are coupled by fastening nuts 56 and 56 that are screwed to the anchor bolt 55, the anchor bolt 55 is attached. It is possible to use both the steel beam 42 and the connecting hardware 50 for fixing.

  As shown in FIG. 4, a pile lid 20 that closes the upper end opening 11 </ b> A is attached to the upper portion of the support pile 11. The pile lid 20 includes a lid body 21 having a disk shape substantially the same diameter as the outer diameter of the support pile 11, and a centering bolt 23 that is screwed into a screw hole 21A that penetrates the center of the lid body 21 (the present invention). (Refer to FIG. 5 (A)), and with the pile lid 20 attached to the support pile 11, the centering bolt 23 is It moves up and down on the central axis 11J of the support pile 11. In the building support structure 10 of this embodiment, the centering bolt 23 penetrates the discarded concrete layer 15 and is exposed on the upper surface 15M of the discarded concrete layer 15. Specifically, the upper surface 23M of the centering bolt 23 is substantially flush with the upper surface 15M of the discarded concrete layer 15. The centering bolt 23 is prevented from coming off downward by the head portion 23H.

  The pile lid 20 is attached to the upper portion of the support pile 11 by the fixed leg portion 22 being press-fitted and fixed inside the support pile 11. As shown in FIG. 5A, the fixed leg portion 22 includes a cylindrical portion 22A that hangs down from the lid 21 and a plurality of fixed pieces 22B that protrude outward from the cylindrical portion 22A. Specifically, the cylindrical portion 22A has a smaller diameter than the upper end opening 11A of the support pile 11 (see FIG. 5B), and the lower end portion of each fixed piece 22B is directed outward as it goes upward. Inclined. As shown in FIG. 5B, when the fixed leg portion 22 is press-fitted inside the support pile 11, the plurality of fixed pieces 22B come into contact with the inner peripheral surface 11N of the support pile 11, and the fixed leg portion 22 supports. It is fixed inside the pile 11. At this time, since the opening edge of the upper end opening 11 </ b> A of the support pile 11 and the lid body 21 come into contact with each other, foreign matter is prevented from entering the support pile 11 from the upper end opening 11 </ b> A. In the present embodiment, the plurality of fixed pieces 22B are arranged in pairs at positions separated by 180 degrees in the circumferential direction of the cylindrical portion 22A.

  The description regarding the structure of the building support structure 10 of this embodiment is above. Next, the construction method of the building support structure 10 will be described.

  FIG. 6 shows a construction flow of the building support structure 10. As shown in the figure, in order to construct the building support structure 10, first, a pile foundation 12 is formed (step S11). Specifically, a plurality of support piles 11 are driven into a plurality of locations determined by the construction drawing in the ground (see FIG. 7A. In the figure, only one support pile 11 is shown). . The length of the support pile 11 is set based on the result of the ground investigation performed in advance, and each support pile 11 is driven until the lower end portion of the support pile 11 reaches the hard ground.

  When the pile foundation 12 is formed, the pile lid 20 is then attached to the support pile 11 (step S12 in FIG. 6). Specifically, as shown in FIG. 7A, in the state where the lower part of the fixed leg portion 22 is inserted into the upper end opening 11A of the support pile 11, the lid body 21 is hit from above with a hammer or the like. Here, the cylindrical portion 22A of the fixed leg portion 22 has a smaller diameter than the upper end opening 11A of the support pile 11, and the lower end portion of the fixed piece 22B is inclined so as to go outward as it goes upward. The fixed leg portion 22 is smoothly inserted inside the support pile 11. The plurality of fixed pieces 22 </ b> B come into contact with the inner peripheral surface 11 </ b> N of the support pile 11, and the fixed leg 22 is press-fitted and fixed to the support pile 11. Here, since the fixed leg portion 22 is inserted inside the support pile 11, as shown in FIG. 7A, even if the outside of the support pile 11 is covered with soil, the support pile 11 can be attached to the pile lid 20. Further, the centering bolt 23 is disposed at the lower end position of the movable stroke, that is, the position where the head portion 23 contacts the lid body 21, and the amount of projection of the centering bolt 23 from the lid body 21 is minimized. It has become. Thereby, when the fixed leg portion 22 is press-fitted and fixed, the centering bolt 23 is prevented from obstructing the work.

  When the pile cover 20 is attached, excavation is then performed (step S13 in FIG. 6). In this excavation, a portion where the discarded concrete layer 15 is formed is excavated in accordance with the height of the head of the support pile 11 (see FIG. 8A). In this case, the centering bolt 23 is disposed at the lower end position of the movable stroke, thereby preventing the excavation work from being hindered.

  By the way, since excavation work is performed using heavy equipment, such as an excavator, there is a possibility that the shovel or the like of the heavy equipment hits the pile lid 20 and the pile lid 20 comes off. Here, when the pile lid 20 is fixed to the support pile 11 by welding, in order to reattach the pile lid 20, it is necessary to prepare a welding tool, which is troublesome. On the other hand, in this embodiment, since the pile lid 20 is press-fitted and fixed to the support pile 11, even if the pile lid 20 is removed during excavation work, it can be easily reattached to the support pile 11. Become.

  When excavation is completed, the position of the centering bolt 23 is then adjusted (step S14 in FIG. 6). Specifically, the centering bolts 23 are moved up and down to arrange the upper surfaces 23M of the plurality of centering bolts 23 at the same height (see FIG. 8B).

  When the position adjustment of the centering bolt 23 is completed, the discarded concrete layer 15 is then formed (step S15 in FIG. 6). Specifically, concrete is laid on the pile foundation 12 (see FIG. 9A). At this time, the upper surface of the concrete is made to coincide with the upper surfaces 33M of the plurality of centering bolts 23 (see FIG. 9B). Thereby, even if there is a shift in the upper end position between the plurality of support piles 11, it is possible to absorb the shift and make the upper surface 15M of the discarded concrete layer 15 substantially horizontal. In addition, since the centering bolt 23 can be continuously changed in height, it is possible to improve the accuracy of absorbing the deviation. Moreover, by adjusting to the height of the concrete thickness which requires the height of the centering bolt 23 provided in the support pile 11 with the highest upper end position among the plurality of support piles 11, it is necessary. It is also possible to form the discarded concrete layer 15 that ensures the thickness of the concrete to be performed.

  When the discarded concrete layer 15 is formed, ink marking is then performed (step S16 in FIG. 6). Specifically, as shown in FIG. 10, a ground ink 17 indicating the positions of pillars 92, walls, windows, doors, etc. of a building 90 (see FIG. 1) is attached to the upper surface 15 </ b> M of the discarded concrete layer 15.

  When the ink marking is completed, the displacement between the column core (center axis 92J of the column 92) and the pile core (center axis 11J of the support pile 11) is measured (step S17 in FIG. 6). Specifically, as shown in FIG. 11, a deviation d between the center of the centering bolt 23 exposed on the upper surface 15M of the discarded concrete layer 15 and the column center position P1 corresponding to the center of the column 92 is measured. The column center position P1 can be obtained from the result of inking. Further, since the centering bolt 23 is disposed on the central axis 11 </ b> J of the support pile 11, the center position of the centering bolt 23 represents the center position of the support pile 11. Thus, in this embodiment, since the centering bolt 23 arranged on the central axis 11J of the support pile 11 is exposed on the upper surface 15M of the discarded concrete layer 15, the support pile 11 is placed under the discarded concrete layer 15. Even if it is buried, it is possible to grasp the center position of the support pile 11, which makes it possible to accurately measure the deviation between the center axis 11 </ b> J of the support pile 11 and the center axis 92 </ b> J of the column 92. . In addition, the pillar 92 shown with the dashed-two dotted line in FIG. 11 is a thing to be erected according to the result of inking (base ink 17).

  When the misalignment between the column center and the pile center is measured, the building foundation 40 is then formed (step S18 in FIG. 6). Specifically, based on the ground ink 17, the connecting hardware 50 is discarded and fixed to the upper surface 15M of the concrete layer 15 (see FIG. 12), and the steel beam 42 is fixed on the connecting hardware 50 (see FIG. 13). The connection hardware 50 is disposed on the support pile 11. The steel beam 42 is fixed as follows. That is, the steel beam 42 is placed on the connecting metal 50, and the bolt insertion hole 45A of the lower flange plate 45 is overlapped with the bolt insertion hole 51A of the top plate 51 in the connecting metal 50 (see FIG. 3B). . Then, the anchor bolt 55 is inserted into the bolt insertion holes 45 </ b> A and 51 </ b> A, and the lower flange plate 45 and the top plate 51 are coupled by the tightening nuts 56 and 56. At this time, the anchor bolt 55 passes through the bolt insertion hole 44 </ b> A of the upper flange plate 44.

  When the steel beam 42 is fixed to the connecting hardware 50, a wire mesh 47 (see FIG. 2) is attached to the surface of the steel beam 42 facing the outside of the building in parallel with the web plate 43C.

  Next, the steel foundation beam 42, the connecting hardware 50, the anchor bolt 55, and the wire mesh 47 are covered with the concrete 46 to form the building foundation 40. Specifically, a concrete casting mold (not shown) is installed on the upper surface 15M of the discarded concrete layer 15 so as to surround the steel beam 42, and the concrete is poured into the mold. At this time, the concrete is placed so as to be substantially flush with the upper surface of the steel beam 42, that is, the upper flange plate 44. Then, after curing the concrete, the formwork is removed. Then, the building foundation 40 which combines the underground beam 41 is formed (refer FIG. 14). Here, when the deviation between the column core and the pile core exceeds the preset allowable range, concrete or the like is projected from the underground beam 41 to the side based on the direction and size of the deviation. Or the reinforcement of the building foundation 40 is appropriately performed by locally widening the width of the concrete covering the steel beam 42. As described above, the building support structure 10 is completed.

  This completes the description of the construction method of the building support structure 10. Next, the effect of the building support structure 10 according to the present embodiment, its construction method, and the pile lid 20 will be described.

  According to the present embodiment, since the centering bolt 23 disposed on the central axis 11J of the support pile 11 is exposed on the upper surface 15M of the discarded concrete layer 15, the center position P1 and the center of the column 92 obtained by inking By measuring the deviation from the center of the feeding bolt 23, the deviation between the central axis 92J of the column 92 and the central axis 11J of the support pile 11 can be measured. Thereby, it becomes possible to measure the deviation between the central axis 11J of the support pile 11 and the central axis 92J of the column 92 more accurately than before, and the building foundation 40 can be reinforced more appropriately than before. .

  Moreover, in this embodiment, before forming the discarded concrete layer 15, the height positions of the upper ends of the centering bolts 23 attached to the plurality of support piles 11 are aligned to form the discarded concrete layer 15. At this time, the upper surface of the concrete can be aligned with the upper ends of the plurality of centering bolts 23, so that the horizontality of the upper surface 15 </ b> M of the discarded concrete layer 15 can be improved. In particular, in the configuration in which the building foundation 40 formed on the discarded concrete layer 15 includes the steel beam 42 in the core material as in the present embodiment, the height of the building foundation 40 becomes substantially uniform. It becomes possible to receive more benefits from increasing the level of the concrete layer 15.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various modifications are possible within the scope of the invention other than the following. It can be changed and implemented.

  (1) In the above embodiment, the pile lid 20 is fixed to the support pile 11 by press-fitting the fixed leg portion 22, but the fixed leg portion 22 is not provided, and the upper end portion of the support pile 11 is covered with a lid. It may be performed by welding the body 21.

  (2) A cylindrical fixed leg portion 22V that fits with the inner peripheral surface 11N of the support pile 11 may be provided like a pile cover 20V shown in FIG.

  (3) A “fixed leg portion” of the present invention is constituted by a pair of fixed plates 22Y and 22Y arranged in pairs so as to sandwich the central axis of the support pile 11 like a pile lid 20Y shown in FIG. May be. In this configuration, the pile lid 20 is press-fitted and fixed to the support pile 11 by inscribing the pair of fixing plates 22 </ b> Y and 22 </ b> Y to the inner peripheral surface 11 </ b> N of the support pile 11.

  (4) In the above embodiment, concrete is cast on the upper side of the support pile 11 to form the discarded concrete layer 15, but crushed stones or split chestnuts are laid on the upper side of the support pile 11, and concrete is cast on the upper side. The discarded concrete layer 15 may be formed.

  (5) In the above-described embodiment, the “centering member” according to the present invention is configured by the centering bolt 23 that is screwed into the screw hole 21 </ b> A of the lid 21, but a jack or the like is fixed to the lid 21. The jack may be used.

  (6) In the above-described embodiment, the building foundation 40 has the structure including the steel beam 42 as the core material, but the structure may include a reinforcing bar as the core material.

  (7) In the above embodiment, the shape of the lid body 21 is formed in a disk shape that is substantially the same diameter as the outer diameter of the upper surface of the support pile 11, but is large enough to close the upper end opening 11 </ b> A of the support pile 11. For example, it may be oval or rectangular. At that time, the screw hole 21 </ b> A may be formed so as to be arranged on the central axis 11 </ b> J of the support pile 11 when the lid body 21 is attached to the support pile 11.

  (8) Although the example which used the small diameter steel pipe pile as the support pile 11 was shown in the said embodiment, you may use a concrete pile, for example.

  (9) In the above embodiment, the fixed leg portions 22 and 22 are formed by a pair of flat plates, but may be formed by a plurality of shafts arranged at equal intervals in the circumferential direction of the lid body 21. Also by this structure, it becomes possible to fix the pile cover 20 to a support pile by making the some fixed leg part 22 inscribed in the internal peripheral surface 11N of the support pile 11. FIG.

  (10) In the above embodiment, the steel beam 42 may have a grooved structure in which the web plate 43 is connected to the horizontal end portions of the upper flange plate 44 and the lower flange plate 45.

DESCRIPTION OF SYMBOLS 10 Building support structure 11 Support pile 11J Center axis 12 Pile foundation 15 Discarded concrete layer 20, 20V, 20Y Pile cover 23 Centering bolt (centering member)
40 Building Foundation 42 Steel Beam 90 Building 92 Column 92J Center Axis

Claims (13)

Pile support piles into multiple predetermined positions on the ground to form a pile foundation,
Placing concrete on the pile foundation to form a discarded concrete layer,
In the construction method of the building support structure in which the top surface of the discarded concrete layer is marked, and the foundation of the building is formed on the discarded concrete layer,
Before forming the discarded concrete layer, a centering member is attached to the top of each support pile so as to be vertically movable on the center axis of the support pile, and the top ends of the plurality of centering members are at the same height position. In line with
A method for constructing a building support structure in which the upper surface of the concrete is aligned with the upper ends of the centering members when forming the discarded concrete layer. The support pile is formed in a cylindrical shape with an open upper end, and the upper end opening of the support pile is closed with a pile lid,
The pile lid is provided with a lid body covering the upper end opening of the support pile, and a centering bolt as the centering member screwed into a screw hole penetrating the lid body,
The construction method of the building support structure according to claim 1, wherein the centering member is attached to the support pile by attaching the pile lid to the support pile. The pile lid is provided with a fixed leg portion that enters into the support pile,
The construction method of the building support structure according to claim 2, wherein the fixing leg is press-fitted and fixed in the support pile when the pile cover is attached to the support pile.   The fixed leg portion hangs down from the lid body and has a smaller diameter than the upper end opening of the support pile, and a plurality of fixed pieces that protrude outward from the tube portion and abut against the inner peripheral surface of the support pile. The construction method of the building support structure of Claim 3 provided with these.   The building support structure construction method according to any one of claims 1 to 4, wherein the foundation of the building includes a steel beam as a core material. The steel beam is provided with a web plate arranged vertically and a pair of flange plates projecting laterally from both upper and lower ends of the web plate,
In forming the foundation of the building, a connecting hardware having a structure in which support legs are suspended from the top plate is fixed on the discarded concrete layer, and a steel beam is placed on the top plate. The building support structure according to claim 5, wherein an anchor bolt is passed through the flange plate and the top plate, and the connecting hardware and the lower flange plate are coupled by a fastening nut screwed into the anchor bolt. Construction method. A pile foundation formed of a plurality of support piles embedded in a plurality of predetermined positions on the ground;
A discarded concrete layer formed on the pile foundation;
In a building support structure comprising a building foundation formed on the discarded concrete layer,
A centering member capable of moving up and down on the central axis of the support pile is attached to the top of each support pile,
A building support structure in which the plurality of centering members are arranged at the same height at the upper end, and the upper ends of the plurality of centering members and the upper surface of the discarded concrete layer are arranged flush with each other. The support pile is formed in a cylindrical shape with an open upper end, and the upper end opening of the support pile is closed with a pile lid,
The pile lid is provided with a lid that covers the upper end opening of the support pile, and a centering bolt that is screwed into a screw hole that penetrates the lid.
The building support structure according to claim 7, wherein the centering member includes the centering bolt.   The building support structure according to claim 8, wherein the pile lid is provided with a fixed leg portion that is inserted into the support pile and is press-fitted and fixed inside the support pile.   A plurality of fixings that are suspended from the lid and have a smaller diameter than the upper end opening of the support pile, and a plurality of fixings that protrude outward from the cylinder portion and abut against the inner peripheral surface of the support pile. The building support structure according to claim 9 provided with a piece.   The building support structure according to any one of claims 7 to 10, wherein the foundation of the building includes a steel beam as a core material. On the abandoned concrete layer, a connecting hardware having a structure in which a support leg is suspended from the top plate is fixed,
The steel beam has a web plate disposed vertically and a pair of flange plates projecting laterally from both upper and lower ends of the web plate, and is placed on the top plate,
The building support structure according to claim 11, further comprising an anchor bolt that is screwed with a tightening nut that passes through the pair of flange plates and the top plate and joins the connecting hardware and the lower flange plate. . A pile lid that closes the upper end opening of the support pile that is driven into the ground and constitutes the pile foundation,
A lid having a screw hole that covers the upper end opening of the support pile and is disposed on the central axis of the support pile;
A centering bolt screwed into the screw hole;
A fixed leg portion that is press-fitted and fixed inside the support pile ,
The fixed leg portion includes a cylindrical portion that hangs down from the lid and has a smaller diameter than the upper end opening of the support pile, and a plurality of fixed pieces that project outward from the cylindrical portion and come into contact with the inner peripheral surface of the support pile. Have
The fixed piece is fixed over the entire axial length of the cylindrical portion, the upper end of the fixed piece communicates with the lid, and the lower end of the fixed piece gradually protrudes away from the lid side. Pile lid that is getting smaller .

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