JP2018100585A - Foundation structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve reduction of effort and time that are needed for fieldwork in construction of a foundation structure.SOLUTION: A column 2 comprises a connection part 10 of a foundation beam 6 on the lower end side of a column body 9. Regarding the connection part 10, a foundation beam 6, which extends in four directions, is connected to mounting members 11 that are provided in the four directions. The connection part 10 and the foundation beam 6 comprise rib plates 28 and 29 that extend obliquely downwards outside the column 2 on webs 12 and 7, and each of the rib plates 28 and 29 is connected by a splice plate 30 to form a load transfer means 3. On a ground 4, separate pressure-resistant plates 5a and 5b are disposed in positions below the column 2 and below each lower end side of the load transfer means 3, and the lower end side of the column 2 and each lower end side of the load transfer means 3 are fixed to the pressure-resistant plate 5a and each of the pressure-resistant plates 5b via anchor bolts 17 and 32 in order to form a foundation structure 1.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a foundation structure that supports a load acting on a pillar of a building by transmitting it to the ground.

  In steel-frame buildings, the upper structure of the main part (main structure part) in terms of structural strength is formed by columns and beams, and the lower structure has an independent foundation (independent footing foundation) provided below the pillar. There is a configuration one. In this building, the load from the superstructure is transmitted and supported from the column base to the ground via an independent foundation (see, for example, Patent Document 1).

  The independent foundation usually excavates the ground, performs grounding work on the bottom of the excavated ground, assembles reinforcing bars and formwork on it, performs concrete placement and curing, and forms a footing. After that, when the footing is cured and reaches the required strength, the lower end side of the column is connected to the upper side of the footing, whereby the column is erected.

JP 2005-68953 A

  However, since the independent foundation requires concrete placement and curing at the site, it is actually necessary to increase the time and labor required for the work at the site.

  In addition, when the load acting on the pillar of the building increases, the independent foundation needs to increase the footing area accordingly. Therefore, as the load acting on the pillar of the building increases, the labor and time required for the field work increases.

  Therefore, the present invention can transmit the load acting on the building pillar to the ground and support it, and even if the load acting on the building pillar is large, the labor and time required for the field work are reduced. An object of the present invention is to provide a basic structure capable of reducing the amount of material.

  In order to solve the above-mentioned problems, the present invention provides a plurality of load transmission means provided on the lower end side of a pillar of a building so as to protrude outward in the circumferential direction of the pillar, and lower ends of the load transmission means on the ground. And a pressure-sensitive plate individually arranged at a position on the side, and a base structure having a structure in which the respective pressure-resistant plates are respectively connected to the lower end sides of the load transmitting means.

  In addition, a plurality of load transmission means provided on the lower end side of the pillar of the building so as to project outward in the circumferential direction of the pillar, and individually arranged at positions on the lower end side of the pillar and each load transmission means on the ground A foundation structure having a structure in which the pillars and lower end sides of the load transmitting means are connected to the respective pressure plates.

  The load transmitting means includes a rib plate provided on a foundation beam connected to the lower end side of the column so as to extend obliquely downward from the column to the outside.

  According to the foundation structure of the present invention, the load acting on the building pillar can be transmitted to and supported by the ground, and further, even when the load acting on the building pillar is large, The time and effort required can be reduced.

It is the schematic which shows 1st Embodiment of a foundation structure. It is a figure which shows the foundation structure of FIG. 1 from another direction. It is a figure which shows the foundation structure of FIG. 1 from another direction. It is the figure which isolate | separated and showed the member which comprises the basic structure of FIG. It is the schematic which shows 2nd Embodiment of a foundation structure. It is the schematic which shows 3rd Embodiment of a foundation structure. It is the schematic which shows 4th Embodiment of a foundation structure.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic perspective view showing a first embodiment of a foundation structure. FIG. 2 is a schematic cut side view of the substructure of FIG. 3 is a view taken in the direction of arrows AA in FIG. FIG. 4 is a schematic perspective view showing the pillar, the pressure plate and the foundation beam of the foundation structure of FIG. 1 separately.

  The foundation structure of this embodiment is shown by the code | symbol 1 in FIG.1, FIG.2, FIG.3, The some load transmission means 3 projected to the outer peripheral side of the pillar 2 is provided in the lower end side of the pillar 2 of a building. I have. Further, on the ground 4, a pressure plate 5 a is disposed at a position below the pillar 2, and an individual pressure plate 5 b is disposed at a position below the lower end of each load transmission means 3. The lower end side of the column 2 and the lower end side of each load transmission means 3 are connected to the 5a and each pressure plate 5b, respectively.

  In this embodiment, as an example of the case where the present invention is applied to a configuration in which the foundation beam 6 is connected to the lower end side of the column 2, the load transmission means 3 is provided using a part of the configuration of the foundation beam 6. A configuration example is shown.

  The foundation beam 6 connects the lower end side of the column 2 and the lower end side of an adjacent column (not shown). In this embodiment, the foundation beam 6 is arrange | positioned so that it may extend in the four directions of the circumferential direction 90 degree | times centering on the pillar 2. As shown in FIG. The foundation beam 6 is made of H-shaped steel, and is used in a posture in which the web 7 is arranged in the vertical direction and the flanges 8a and 8b are arranged in the horizontal direction.

  The column 2 is provided on the lower end side of the column main body 9 which is made of a square steel pipe or a section steel and extends in the vertical direction, and a connecting portion for connecting each foundation beam 6 extending in all directions. 10.

  The column main body 9 is connected to a beam (not shown) at a set height position, and forms an upper structure of a steel structure building together with the beam.

  As shown in FIG. 4, the connecting portion 10 is a cross in which four attachment members 11 made of H-shaped steel similar to the foundation beam 6 and extending in the lateral direction are brought close to each other at 90 ° intervals in the circumferential direction. It is prepared in the shape arrangement. Each attachment member 11 is connected to the upper end sides at one end side via a flat plate member 14, and the lower end sides are connected via a flat base plate 15.

  Each mounting member 11 is provided with a notch into which the plate member 14 is fitted at the upper end side of the upper flange 13a and the web 12, and the edge of the flange 13a facing the notch and the web 12 is the plate member 14. Is attached. Thereby, the upper surface of the flange 13a of each attachment member 11 and the upper surface of the plate member 14 are arrange | positioned flush.

  Further, each mounting member 11 is provided with a notch into which the base plate 15 is fitted on the lower flange 13b and the lower end side of the web 12, and the flange 13b and the edge of the web 12 facing the notch are arranged on the base plate. 15 is attached. Thereby, the lower surface of the flange 13b of each attachment member 11 and the lower surface of the base plate 15 are arranged flush.

  The lower end of the column main body 9 is attached to the plate member 14 at the center of the upper surface.

  Bolt insertion holes 16 are provided in the base plate 15 at four corners arranged so as not to interfere with the mounting members 11 so as to penetrate in the plate thickness direction which is the vertical direction. As a result, the base plate 15 allows the four anchor bolts 17 of the pressure plate 5a arranged below to be inserted into the bolt insertion holes 16 and the nuts 18 to be tightened on the anchor bolts 17 to form the pressure plate 5a. Can be fixed.

  In addition, the web 12 of each attachment member 11 can be provided with a diagonal notch in the corner portion on one end side and the lower end side disposed in the center portion of the base plate 15 as necessary. In this way, by limiting the length of the edge attached to the base plate 15 of each web 12, the pressure-resistant plate 5 a disposed immediately below the column 2 is provided from the column main body 9 to the plate member 14. The stress burden when receiving a load via the attachment member 11 and the base plate 15 can be reduced. The decrease in the stress load of the pressure plate 5a becomes a stress load distributed according to the number of the pressure plates 5b with respect to the other pressure plates 5b that receive a load via each load transmitting means 3. Thereby, the load acting on the pressure plate 5a and each pressure plate 5b is more equalized.

  Each attachment member 11 is connected to each foundation beam 6 on the other end side. Therefore, in this embodiment, as shown in FIGS. 2 and 4, the other end side of each mounting member 11 is located above the flange 13 a and the web 12 as viewed from the side perpendicular to the longitudinal direction of the mounting member 11. An upper end surface 19 is provided along the vertical direction. Further, a lower end face 20 is provided below the flange 13b and the web 12 at a position on the inner side (near the center of the column 2) than the upper end face 19 along the vertical direction. Further, an inclined surface 21 that obliquely connects the lower end of the upper end surface 19 and the upper end of the lower end surface 20 is provided in the intermediate portion of the web 12. Therefore, the other end side of each mounting member 11 has a substantially crank shape in which the end surface 19 on the upper side protrudes from the end surface 20 on the lower side.

  On the other hand, each foundation beam 6 has a substantially crank shape complementary to a substantially crank shape on the other end side of each mounting member 11 at an end connected to the column 2.

  That is, the end portion of each foundation beam 6 is provided with an upper end surface 22 in contact with the upper end surface 19 of each mounting member 11 on the flange 8 a and the web 7. At the lower part of the flange 8 b and the web 7, a lower end face 23 that comes into contact with the lower end face 20 of each attachment member 11 is provided so as to protrude from the upper end face 22. An intermediate portion of the web 7 is provided with an inclined surface 24 that contacts the inclined surface 21 of each attachment member 11.

  As a result, each foundation beam 6 has an upper end surface 22, a lower end surface 23, and an inclined surface 24, and an upper end surface 19, a lower end surface 20, and an inclined surface 21 of each mounting member 11 of the column 2. Each can be placed against each other. At this time, the respective foundation beams 6 and the respective attachment members 11 are arranged such that the ends of the flange 8a and the flange 13a, the ends of the web 7 and the web 12, and the ends of the flange 8b and the flange 13b abut each other.

  In this state, the flange 8a and the flange 13a are connected to the contact plates 25 arranged on both the upper and lower sides via bolts and nuts (not shown). Further, the flange 8b and the flange 13b are connected to the contact plates 26 arranged on both upper and lower sides via bolts and nuts (not shown). Further, the web 7 and the web 12 are connected to the upper part of the inclined surface 24 and the inclined surface 21 and the lower part via the connecting plate 27 arranged on both sides via bolts and nuts (not shown). Is done. Thereby, each foundation beam 6 is connected to the connection portion 10 of the column 2.

  Note that the portion where each mounting member 11 and each foundation beam 6 abuts has a substantially crank shape because a rectangular attachment plate 27 for connecting the webs 7 and 12 is provided with rib plates 28 and 29 described later. This is because they are arranged so as not to interfere with each other. Therefore, if the attachment plate 27 can be disposed at a position where it does not interfere with the rib plates 28 and 29 and the webs 7 and 12 can be connected to each other by the attachment plate 27, each attachment member 11 and each foundation beam It goes without saying that the abutting portion of 6 may have a shape other than the substantially crank shape shown in the figure.

  In this embodiment, the load transmitting means 3 further includes rib plates 28 provided on both side surfaces of the web 12 of each mounting member 11 in the column 2 and ribs provided on both side surfaces of the web 7 of each foundation beam 6. The plate 29 and the rib plate 28 and the attachment plate 30 for connecting the rib plates 29 are provided.

  The rib plates 28 are provided on both side surfaces of the web 12 so as to extend obliquely downward from the lower surface of the outer peripheral portion of the plate member 14 to the middle portion of the inclined surface 21 in the direction of the outside of the pillar 2. The upper end portion of the rib plate 28 is attached to the lower surface of the plate member 14 so that a part of the load acting on the plate member 14 from the column main body 9 can be received by the rib plate 28.

  The rib plates 29 are provided on both surfaces of the web 7 so as to extend obliquely downward at an angle similar to that of the rib plate 28 from the intermediate portion of the inclined surface 24 toward the outside of the pillar 2. Thus, when the inclined surface 24 is abutted against the inclined surface 21 of the mounting member 11, the rib plate 29 is arranged in line with the rib plate 28, and the upper end portion of the rib plate 29 protrudes against the lower end portion of the rib plate 28. It is made to fit.

  The lower end of the rib plate 29 is attached to the upper surface of the flange 8b. In the present embodiment, a bent portion that is bent downward is provided on the lower end side of the rib plate 29 so that the rib plate 29 does not interfere with the anchor bolt 32 of the pressure plate 5b attached to the flange 8b. .

  Four bolt insertion holes 31 are provided in the flange 8b in the vicinity of the attachment location of the rib plate 29. As a result, the flange 8 b allows the four anchor bolts 32 of the pressure plate 5 b disposed below the attachment position of the rib plate 29 to be inserted into the bolt insertion holes 31, and the nuts 33 are tightened to the anchor bolts 32. Thus, it can be fixed to the pressure plate 5b.

  The attachment plate 30 is disposed on both upper and lower sides of a portion of the rib plate 28 and the rib plate 29 that are disposed to face each other, and is connected to both the rib plate 28 and the rib plate 29 via bolts and nuts (not shown). . As a result, the rib plate 28 and the rib plate 29 are connected to each other, so that the load received by the rib plate 28 from the plate member 14 is transmitted to the pressure plate 5b via the attachment plate 30, the rib plate 29, and the flange 8b. it can.

  At this time, the load of the column 2 is also transmitted through the portion of the web 12 of the mounting member 11 and the web 7 of the foundation beam 6 located between the plate member 14 and the pressure plate 5b.

  Therefore, the load transmission means 3 of the present embodiment includes the rib plates 28 and 29 and the portions of the webs 12 and 7 that are located near the locations where the rib plates 28 and 29 are attached. A column having a virtual decimated section extending obliquely downward to the side is formed, and the load of the column 2 is transmitted to each pressure-resistant plate 5b through the virtual column.

  Each of the pressure plate 5a and the pressure plate 5b is a flat plate member having a set area. In the present embodiment, for example, each of the pressure plate 5a and the pressure plate 5b has a square planar shape and is made of precast concrete. The areas of the pressure plate 5a and the pressure plate 5b may be set in consideration of the load acting on the column 2 in the building, the ground strength, and the number of the pressure plates 5a and 5b.

  Four anchor bolts 17 and four anchor bolts 32 are provided so as to protrude upward in the center of the upper surfaces of the pressure plate 5a and each pressure plate 5b. The arrangement of the anchor bolts 17 in the pressure plate 5a only needs to correspond to the arrangement of the bolt insertion holes 16 of the base plate 15 of the pillar 2. Moreover, the arrangement | positioning of the anchor bolt 32 in each pressure-resistant plate 5b should just respond | correspond with the arrangement | positioning of the bolt insertion hole 31 provided in the flange 8b of each foundation beam 6. FIG.

  Note that the pressure plate 5a and the pressure plate 5b preferably have the same structure such as the shape and the arrangement of the anchor bolts 17 and 32 from the viewpoint of reducing manufacturing effort and cost. However, the pressure plate 5a and the pressure plate 5b may have different structures in which the shape, the arrangement of the anchor bolts 17 and 32, and the like are different.

  As shown in FIGS. 3 and 4, the pressure plate 5a and each pressure plate 5b are placed on the ground 4 on which the construction is performed so as to be as flat as possible, at a position directly below the place where the pillar 2 is installed. Are arranged, and the pressure-resistant plates 5b are arranged side by side on the four sides.

  The pressure plate 5a and the pressure plate 5b are arranged in a cross shape, but at this time, the opposing side surfaces may be arranged so as to contact each other, or between several millimeters to several tens of centimeters between the opposing side surfaces. You may make it arrange | position across the clearance gap of a meter.

  In this state, as shown in FIGS. 1, 2, and 3, the base plate 15 of the pillar 2 is attached to the upper side of the pressure-resistant plate 5 a via anchor bolts 17 and nuts 18. Further, a flange 8b of the foundation beam 6 connected to the column 2 is attached to the upper side of each pressure plate 5b via an anchor bolt 32 and a nut 33.

  At this time, as shown in FIG. 2, in the gap formed between the pressure plate 5a and the base plate 15 or between each pressure plate 5b and each flange 8b, there is no shrinkage mortar, air-kneaded mortar, sand, etc. The filler 34 is filled. Thereby, the shift | offset | difference of the upper surface of the pressure plate 5a arrange | positioned on the ground 4 and each pressure plate 5b is absorbed. Furthermore, the shift | offset | difference of the upper surface of the pressure-resistant plate 5a and each pressure-resistant plate 5b which arises for every foundation structure 1 which supports the pillar 2 of a building is also absorbed.

  The basic structure 1 of the present embodiment having the above-described configuration is the pressure-resistant plate 5a, 5b that is manufactured at a factory or the like on the ground 4 that has been constructed so as to be flat. Then, after placing each pressure plate 5b in a set arrangement, the work of installing the pillar 2 on the upper side of each pressure plate 5a, 5b can be performed.

  Therefore, when the foundation structure 1 of the present embodiment is constructed, the pressure plate 5a and the plurality of pressure plates 5b may be arranged side by side on the ground, so that a conventional reinforced concrete foundation is constructed on site. Reinforced concrete work is not necessary. Therefore, the foundation structure of the present embodiment can reduce labor and time required for construction work on site, compared to a conventional independent foundation made of reinforced concrete.

  Moreover, the load of the column 2 can be transmitted to the pressure plate 5b through a plurality of load transmitting means 3 projecting to the outer peripheral side of the column 2 in addition to the pressure plate 5a arranged immediately below the column 2. Therefore, since the foundation structure 1 of this embodiment can disperse | distribute the load which acts on the pillar 2 to each pressure-resistant plate 5a, 5b, and can be transmitted and supported to the ground 4, it acts on the pillar 2 of a building. Even when the load is large, it can be easily handled.

  In addition, the foundation structure 1 of this embodiment showed the example of the structure by which the foundation beam 6 extended in four directions was connected to the lower end side of the pillar 2. As shown in FIG. On the other hand, the foundation structure 1 of the present embodiment is a part where the foundation beam is connected in two directions at intervals of 90 degrees to the lower end side of the pillar 2 such as a corner portion of a building, or an intermediate portion of a building wall. It may be applied to a place where the foundation beam 6 is connected to the lower end side of the pillar 2 in three directions at intervals of 90 degrees or in two directions at intervals of 180 degrees. In this case, what is necessary is just to change the number and arrangement | positioning of the pressure-resistant plates 5b according to the number and arrangement | positioning of each foundation beam 6. FIG.

[Second Embodiment]
FIGS. 5A and 5B show a second embodiment of the foundation structure. FIG. 5A is a schematic perspective view, and FIG. 5B is a side view showing an enlarged main part.

  5A and 5B, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The foundation structure of this embodiment is shown by the code | symbol 1a in Fig.5 (a), and shows the structural example in case a foundation beam is not connected to the lower end side of the pillar 2 of a building.

  In the present embodiment, the column 2 is attached to the column main body 9, a connecting member 35 having an upper end side connected to the lower end side of the column main body 9 as a cylindrical shape having an axial center in the vertical direction, and an outer peripheral surface of the connecting member 35. And a plurality of beam members 36 as a plurality of load transmitting means.

  The beam-like member 36 is formed of, for example, an H-section steel that extends in one direction with a set length dimension.

  The beam members 36 are arranged at eight positions on the outer periphery of the connecting member 35 at intervals of 45 degrees in the circumferential direction so as to extend along the radial direction of the connecting member 35, and end portions located on the inner periphery of each beam member 36 The side is attached to the outer peripheral surface of the connecting member 35.

  Each beam-like member 36 is provided with a bolt insertion hole 38 in a lower flange 37 on the end side located on the outer periphery as shown in FIG.

  Further, the foundation structure 1a of the present embodiment includes the same number of pressure plates 5b as the pressure plates 5b in the first embodiment as the number of beam members 36.

  The arrangement of the anchor bolts 32 provided at the center of the upper surface of each pressure plate 5b only needs to correspond to the arrangement of the bolt insertion holes 38 provided in the flange 37 of each beam-like member 36.

  As shown in FIG. 5A, each pressure plate 5b is 45 degrees in the circumferential direction along the circumference centered on the installation position of the pillar 2 on the ground 4 which has been constructed so as to be as flat as possible. They are arranged side by side at intervals.

  In this state, each beam-like member 36 of the column 2 is placed on the upper side of each pressure-resistant plate 5 b, and each anchor bolt 32 is inserted into each bolt insertion hole 38 of the flange 37. By tightening 33, each beam-like member 36 is attached to each pressure plate 5b.

  At this time, as shown in FIG. 5B, the gap formed between the pressure plate 5b and the flange 37 is filled with the filler 34. Thereby, as in the first embodiment, the displacement of the upper surface of each pressure-resistant plate 5b disposed on the ground 4 is absorbed. Furthermore, the shift | offset | difference of the upper surface of each pressure-resistant plate 5b produced for every foundation structure 1a which supports the pillar 2 of a building is also absorbed.

  In the basic structure 1a of the present embodiment having the above-described configuration, the pressure plate 5b manufactured in a factory or the like is brought into the construction site of the building, and the pressure plate 5b is set on the ground 4 which is constructed to be flat. After placing in the arrangement, the work of installing the pillar 2 on the upper side of each pressure plate 5b can be performed.

  Therefore, also by the foundation structure 1a of the present embodiment, it is possible to reduce labor and time required for construction work on site, as in the first embodiment, as compared with the conventional independent foundation made of reinforced concrete. it can.

  Moreover, the foundation structure 1a of this embodiment can distribute and transmit the load which acts on the pillar 2 to each pressure-resistant plate 5b via each beam-like member 36. Therefore, the foundation structure 1a of this embodiment can respond easily even when the load which acts on the pillar 2 of a building is large like 1st Embodiment.

  In addition, the foundation structure 1a of this embodiment shows the example of the structure which provides the beam-shaped member 36 in eight places of the circumferential direction of the connection member 35, and attaches each beam-shaped member 36 on the separate pressure-resistant plate 5b. It was. On the other hand, the foundation structure 1a of this embodiment is applied to the column 2 according to the magnitude of the load acting on the column 2 and the appropriate range of the load that can be transmitted to the ground 4 with one pressure-resistant plate 5b. The number of the beam members 36 and the pressure plate 5b provided may be 2 to 7, or 9 or more.

  Thus, when changing the number of the beam-shaped members 36 and the pressure-resistant plates 5b, the beam-shaped members 36 and the pressure-resistant plates 5b may be arranged at intervals set in the circumferential direction with the column 2 as the center. At this time, when the number of pressure plates 5b is reduced, the diameter of the circumference where the pressure plates 5b are arranged is reduced, and when the number of pressure plates 5b is increased, the diameter of the circumference where the pressure plates 5b are arranged is reduced. It should be enlarged.

[Third Embodiment]
FIGS. 6A and 6B show a third embodiment of the foundation structure. FIG. 6A is a schematic perspective view, and FIG. 6B is a cut-away side view showing an enlarged main part.

  In FIGS. 6A and 6B, the same components as those in the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The basic structure of this embodiment is shown by the code | symbol 1b in FIG.

The basic structure 1b of the present embodiment has a configuration similar to that of the second embodiment, in which the load transmission means is a beam-like member 36 that protrudes from the outer periphery of the connecting member 35 provided on the lower end side of the column 2. Instead of this, the load transmission means is configured as a base plate 39 projecting to the outer peripheral side of the connecting member 35.

  The base plate 39 is formed by attaching a disk-shaped member having an outer diameter larger than that of the connecting member 35 to the lower end side of the connecting member 35. Alternatively, the base plate 39 may be formed with a configuration in which an annular member is attached to the outer peripheral surface on the lower end side of the connecting member 35.

  The base plate 39 is provided with bolt insertion holes 40 at a plurality of intervals set in the circumferential direction on the outer peripheral side, for example, at eight intervals at intervals of 45 degrees in the circumferential direction.

  Further, a rib 41 is provided between the upper surface of the base plate 39 and the outer peripheral surface of the connecting member 35 at a position where it does not interfere with the bolt insertion hole 40, for example, at a position between the bolt insertion holes 40 adjacent in the circumferential direction. It is attached. Thereby, the base plate 39 is prevented from being deformed in the vertical direction by the ribs 41.

  Furthermore, the foundation structure 1 b of this embodiment includes the same number of pressure-resistant plates 5 c as the bolt insertion holes 40 of the base plate 39.

  The pressure plate 5c of the present embodiment has an isosceles triangle with a planar shape having an apex angle of 45 degrees. Alternatively, the planar shape of the pressure-resistant plate 5c may be a trapezoidal shape in which the apex angle portion of the isosceles triangle is cut out.

  The pressure plate 5c is provided with an anchor bolt 42 protruding upward at the center of the upper surface. The pressure plate 5c may be made of precast concrete, similarly to the pressure plates 5a and 5b shown in the first embodiment.

  As shown in FIG. 6A, the pressure-resistant plates 5c are arranged on the ground 4 which has been constructed so as to be as flat as possible and arranged at intervals of 45 degrees in the circumferential direction around the installation position of the pillars 2. Yes.

  In this state, the base plate 39 of the pillar 2 is placed on the upper side of each pressure plate 5 c, and the anchor bolts 42 of each pressure plate 5 c are inserted into the bolt insertion holes 40 of the base plate 39. By tightening the nut 43, the base plate 39 is attached to each pressure-resistant plate 5c.

  At this time, as shown in FIG. 6B, a gap formed between the pressure plate 5c and the base plate 39 is filled with a filler 34. Thereby, as in the second embodiment, the displacement of the upper surface of each pressure plate 5c arranged on the ground 4 is absorbed. Furthermore, the shift | offset | difference of the upper surface of each pressure-resistant plate 5c which arises for every foundation structure 1b which supports the pillar 2 of a building is also absorbed.

  The foundation structure 1b of the present embodiment having the above-described configuration can obtain the same effects as those of the second embodiment.

[Fourth Embodiment]
FIGS. 7A and 7B show a fourth embodiment of the foundation structure. FIG. 7A is a schematic perspective view, and FIG. 7B is a side view showing an enlarged main part.

  In FIG. 7, the same components as those in the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  The foundation structure of the present embodiment is indicated by reference numeral 1 c in FIG. 7, and shows another configuration example when the foundation beam 6 is connected to the lower end side of the column 2.

  As in the first embodiment, the column 2 includes a column main body 9 and a connection portion 10a provided on the lower end side of the column main body 9 and connected to the foundation beam 6 in all directions.

  The foundation structure 1c according to the present embodiment includes a plurality of leg members 44 as a plurality of load transmission means on the outer periphery of a location that is above the connection location of each foundation beam 6 on the lower end side of the column 2. Has been.

  In the present embodiment, the leg members 44 are attached to the outer periphery of the column main body 9 at positions that do not overlap with the circumferential arrangement of the foundation beams 6, for example, at four locations in the circumferential direction that are intermediate between adjacent foundation beams 6. ing.

  Each leg member 44 includes a beam portion 45 that extends in the lateral direction with a set dimension and has one end side in the longitudinal direction attached to the column 2, and a lower side than each foundation beam 6 from the other longitudinal end side of the beam portion 45. It is set as the structure provided with the column part 46 extended below to the position and the base plate 47 provided in the lower end side of the column part 46. FIG.

  The base plate 47 is provided with a bolt insertion hole 48 as shown in FIG.

  Furthermore, the foundation structure 1c of this embodiment includes the same number of pressure plates 5b as the leg members 44, which are the same as the pressure plates 5b of the first embodiment.

  The arrangement of the anchor bolts 32 provided at the center of the upper surface of each pressure plate 5b only needs to correspond to the arrangement of the bolt insertion holes 48 provided in the base plate 47 of each leg member 44.

  As shown in FIG. 7 (a), each pressure plate 5b is arranged in line with the arrangement of the leg members 44 around the installation position of the pillar 2 on the ground 4 which has been constructed to be as flat as possible. Has been placed.

  In this state, each leg member 44 of the column 2 is placed on the upper side of each pressure-resistant plate 5 b, and each anchor bolt 32 is inserted into each bolt insertion hole 48 of the base plate 47, and each anchor bolt 32 has a nut 33. Each leg member 44 is attached to each pressure plate 5b.

  At this time, as shown in FIG. 7B, the gap formed between the pressure plate 5b and the base plate 47 is filled with the filler 34. Thereby, as in the first embodiment, the displacement of the upper surface of each pressure-resistant plate 5b disposed on the ground 4 is absorbed. Furthermore, the shift | offset | difference of the upper surface of each pressure-resistant plate 5b produced for every foundation structure 1a which supports the pillar 2 of a building is also absorbed.

  The foundation structure 1c of the present embodiment having the above-described configuration is configured so that the foundation beam 6 is connected to the lower end side of the column 2 and the column 2 is connected to the column 2 via each leg member 44 that is separate from the foundation beam 6. The acting load can be distributed and transmitted to each pressure plate 5b.

  Therefore, the same effects as those of the first embodiment can be obtained also by the foundation structure 1c of the present embodiment.

  In addition, this invention is not limited only to said each embodiment and usage example.

  In each embodiment, for convenience of illustration, the gap filled with the filler 34 is shown as being uniform, but the gap may not be uniform, and there is a portion without a gap. Of course, it may be.

  Connection portions via the attachment plates 25, 26, 27, 30 in the basic structure 1 of the first embodiment, and pressure-resistant plates via the anchor bolts 17, 32, 42 and nuts 18, 33, 43 in each embodiment. The members other than the fixed portions 5a, 5b, and 5c may be attached by welding, but it is needless to say that they may be performed by a technique other than welding.

  The pressure-resistant plates 5a, 5b, and 5c are shown as made of precast concrete. However, the load transmitted from the pillar 2 through the load transmission means 3, the beam-like member 36, the base plate 39, and the leg member 44 to the ground 4 is distributed. As long as it has strength and an area that can support the pillar 2, a material other than precast concrete such as metal may be used. Of course, the pressure plates 5a, 5b, and 5c may have shapes and structures other than those shown in the drawings as long as they can be manufactured at a factory or the like and carried into the site.

  In the first embodiment, the pressure plate 5a directly below the pillar 2 may be omitted. In this case, the load acting on the column 2 is distributed and transmitted to each pressure plate 5b via each load transmission means 3, and is transmitted from each pressure plate 5b to the ground 4 and supported.

  If the lower end side of each rib plate 29 is arranged above the central portion of each pressure-resistant plate 5b, the inclination angle of each rib plate 28, 29 may be an angle other than that shown in the figure.

  In the second embodiment, the beam-like member 36 may have an angle extending obliquely downward toward the outer peripheral side of the column 2.

  In the second embodiment, a position not interfering with each beam-like member 36 in the connecting member 35 of the column 2 or a position above the connecting member 35 in the column 2 and the lower end side of an adjacent column (not shown). It is good also as a structure to which the foundation beam which connects 2 is connected.

  In the third embodiment, the number of pressure-resistant plates 5c attached to the base plate 39 may be increased or decreased. The pressure plate 5c may be arranged with a gap in the circumferential direction.

  The fourth embodiment may have a configuration in which a pressure plate 5a similar to the pressure plate 5a of the first embodiment is provided directly below the pillar 2.

  Moreover, in 4th Embodiment, although the structure by which the foundation beam 6 was connected to the lower end side of the pillar 2 was shown, the structure which attached the leg member 44 as a load transmission means with respect to the pillar 2 to which the foundation beam 6 is not connected. It is good.

  The dimension of the leg member 44 extending in the vertical direction of the column portion 46 may be appropriately changed to an arbitrary dimension other than illustrated.

  The beam portion 45 in the leg member 44 may extend horizontally or may be inclined from the horizontal direction. Further, the column portion 46 may extend vertically or may be inclined from the vertical direction.

  Of course, various modifications can be made without departing from the scope of the present invention.

2 pillars 3 load transmission means 4 ground 5a, 5b, 5c pressure-resistant plate 29 rib plate 36 beam-shaped member (load transmission means)
39 Base plate (load transmission means)
44 Leg member (load transmission means)

Claims (3)

A plurality of load transmitting means provided on the lower end side of the pillar of the building and projecting outward in the circumferential direction of the pillar;
A pressure-resistant plate individually arranged at a position on the lower end side of each load transmitting means on the ground,
A foundation structure having a structure in which a lower end side of each load transmitting means is connected to each pressure-resistant plate. A plurality of load transmitting means provided on the lower end side of the pillar of the building and projecting outward in the circumferential direction of the pillar;
With the pressure-resistant plate individually arranged at the position on the lower end side of the pillar and each load transmission means on the ground,
A foundation structure having a structure in which the pillar and the lower end side of each load transmitting means are connected to each pressure plate. The foundation structure according to claim 1, wherein the load transmission means includes a rib plate provided on the foundation beam connected to the lower end side of the pillar in an arrangement extending obliquely downward from the pillar to the outside.

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