JP6177150B2 - Independent foundation reinforcement structure and independent foundation - Google Patents

Description

  The present invention relates to a bar arrangement structure of an independent foundation and an independent foundation.

  The unit type building is constructed by arranging a plurality of building units having beams and columns on a foundation. As the foundation, there are a fabric foundation provided along the outer periphery of the building and an independent foundation provided in an inner space (underfloor space) surrounded by the fabric foundation. The building unit is installed by placing each pillar thereof on a cloth foundation or an independent foundation, and is fixed to the cloth foundation or the independent foundation via anchor bolts in the installed state.

  Here, when a horizontal force or a pulling force is transmitted from the building unit to the foundation via the anchor bolt when an earthquake occurs, the foundation may peel off around the anchor bolt due to the horizontal force or the pulling force. Therefore, as a measure for preventing such peeling, Patent Document 1 proposes a technique of arranging reinforcing bars around the anchor bolt inside the rising portion of the fabric foundation. This reinforcing bar has a surrounding portion surrounding the anchor bolt, and the portions on both sides in the thickness direction of the rising portion sandwiching the anchor bolt in the surrounding portion are peeling prevention portions. In this case, the fabric foundation can be prevented from being peeled off by the peeling preventing portion. In addition, the reinforcement bar | burr of patent document 1 has a to-be-supported part supported on the main reinforcement extended in the foundation longitudinal direction within the standing part of the cloth foundation, and is arrange | positioned in the state by which the to-be-supported part was supported on the main reinforcement. Yes.

  The independent foundation is provided corresponding to a column assembly portion in which columns of four adjacent building units are aggregated. FIG. 10A is a cross-sectional view showing the periphery of the column assembly portion. As shown in FIG. 10 (a), above the independent foundation 90, each pillar 92 constituting the pillar assembly portion is installed. The four building units 93 are fixed to the independent foundation 90 via anchor bolts 95 in the vicinity of the column assembly portion. Specifically, a floor girder 96 extends in two orthogonal directions from the pillar 92 of the building unit 93, and one of the floor girder 96 is fixed to the independent foundation 90 via an anchor bolt 95. Has been.

  FIG. 10B shows the bar arrangement structure of the independent foundation 90. As shown in FIG. 10B, the independent base 90 includes a plurality of main bars 97 extending in the vertical direction and a plurality of upper and lower hoop bars 98 arranged so as to bundle the plurality of main bars 97. Is provided. The hoop line 98 is disposed so as to surround each anchor bolt 95 embedded in the independent foundation 90 from the outside. In the independent foundation 90, the hoop bars 98 prevent the independent foundation 90 from peeling off around the anchor bolts 95.

  In FIG. 10B, reference numeral 100 denotes an anchor hole into which the anchor bolt 95 is inserted, and reference numeral 94 denotes a lattice-shaped base bar arrangement portion provided in the footing portion of the independent foundation 90 (FIG. 11 ( The same applies to b).

JP 2011-190590 A

  By the way, the case where four building units are each fixed to an independent foundation using two anchor bolts for the purpose of raising the fixed strength of the building unit with respect to an independent foundation, etc. can be considered. In this case, as shown in FIG. 11A, it is conceivable that each floor girder 96 extending in two orthogonal directions from the pillar 92 of the building unit 93 is fixed to the independent foundation 90 via the anchor bolt 95.

  In the following description, among the floor beams 96 extending in the two directions, A is given to the reference numerals of the anchor bolts 95 that fix the floor beams 96 extending in the vertical direction in the figure, and the floor beams 96 extending in the horizontal direction in the figure. B is attached to the code | symbol of the anchor bolt 95 to fix.

  Here, in the above configuration in which the four building units 20 are fixed to the independent foundation 90 by two anchor bolts 95A and 95B, respectively, in order to prevent the foundation from being peeled around the anchor bolts 95A and 95B, for example, It can be considered to have a bar arrangement structure as shown in FIG. That is, it is conceivable to separately provide a hoop line 98B surrounding each anchor bolt 95B in addition to the hoop line 98A surrounding each anchor bolt 95A of the four building units 93.

  However, in this case, since the two hoop muscles 98A and 98B are arranged so as to partially intersect each other, after arranging one hoop muscle 98A (98B) on the independent foundation 90 at the construction site, the other hoop muscle is arranged. When arranging 98B (98A), one hoop line 98A (98B) may interfere with the work. Therefore, there is a possibility that the bar arrangement work becomes extremely difficult.

  The present invention has been made in view of the above circumstances, and provides an independent foundation bar arrangement structure and an independent foundation capable of preventing the peeling of the independent foundation while facilitating on-site bar arrangement work. This is the main purpose.

  In order to solve the above-mentioned problem, the bar arrangement structure of the independent foundation of the first invention corresponds to a plurality of building units arranged side by side on the foundation and a column assembly portion in which each column of the four building units is assembled. Each of the pillars constituting the pillar assembly part is provided with an independent foundation as the foundation, and the two neighboring pillars among the four pillars constituting the pillar assembly part are provided. When each of the directions in which the columns are arranged and orthogonal to each other is defined as a first direction and a second direction, respectively, the four building units are each in the first direction with respect to the columns. The at least one building unit of the four building units is fixed to the outside of the pillar assembly part in the second direction with respect to the pillar. In a unit-type building fixed to the independent foundation via a second anchor portion, a bar arrangement structure applied to the independent foundation, and a plurality of main bars extending in the vertical direction, and the main bars Hoop muscles arranged so that each of the first anchor portions is located inside and each of the second anchor portions is located outside, and provided for each of the second anchor portions. A reinforcing bar, wherein the reinforcing bar is provided so as to surround the second anchor part, and a part disposed outside the independent foundation with respect to the second anchor part is a peeling prevention part. At least one of the plurality of main bars is provided with a support portion that extends laterally to support the reinforcing bar, and the reinforcing bar is supported on the supporting unit. Covered Characterized in that it has a lifting unit.

  According to the present invention, each of the four building units is fixed to the independent foundation via the first anchor portion, and at least one of the four building units is further set to the independent foundation via the second anchor portion. It is fixed. In this case, since the 1st anchor part of each building unit is each surrounded by the hoop line, it can aim at prevention of exfoliation of the independent foundation in the circumference of each 1st anchor part. On the other hand, reinforcing bars are provided for the second anchor portion. The surrounding portion of the reinforcing bar is provided so as to surround the second anchor portion, and a portion arranged on the outer side of the foundation with respect to the second anchor portion in the surrounding portion is a peeling prevention portion. Thereby, the peeling prevention of the independent foundation around the second anchor portion can be achieved by this peeling prevention portion.

  Further, since the supported portion of the reinforcing bar is supported on the supporting portion that extends laterally from the main reinforcing bar, when the reinforcing bar is arranged on the foundation at the construction site, it is easy to place the supported portion on the supporting portion. Reinforcing bars can be arranged with simple work. For this reason, even after the hoop reinforcement surrounding the first anchor portion is arranged, the reinforcement reinforcement can be easily arranged with respect to the second anchor portion. Accordingly, at least one of the four building units is fixed to the independent foundation by the two anchor portions, and the independent foundation (for example, the second foundation, for example) The concrete part around the anchor part) can be prevented from peeling off.

  By the way, even if each 1st anchor part and each 2nd anchor part are put together and enclosed by one hoop line (in the shape of a rectangle), it is possible to aim at prevention of peeling of the foundation in the circumference of each anchor part. However, in this case, the size of the hoop muscle in plan view becomes larger in each of the first direction and the second direction, and the main muscles supporting the hoop muscle at its four corners are located greatly outside at the four corners of the independent foundation. Will end up. In this case, the foundation volume of the independent foundation may increase, for example, because it becomes impossible to provide notches (see reference numeral 99 in FIG. 11A) at the four corners of the independent foundation. In this case, when an inner garage, an elevator, or the like is provided adjacent to the independent foundation, there is a risk that space restrictions may occur due to the independent foundation.

  In that respect, according to the present invention, since only the first anchor portion is surrounded by the hoop line, the size of the hoop line need only be increased at least in the first direction. Therefore, as compared with the case where the first anchor portion and the second anchor portion are respectively surrounded by one hoop muscle, it is not necessary to dispose the main muscle so as to be positioned largely outside at the four corners of the independent foundation. Therefore, since the foundation volume can be reduced by providing cutouts at the four corners of the independent foundation, it is possible to prevent the foundation from peeling off while suppressing the space restriction caused by the independent foundation. It becomes possible.

  An independent foundation bar arrangement structure according to a second invention is characterized in that, in the first invention, the main reinforcing bar is bent laterally at an upper end portion thereof, and the support portion is formed by the horizontal portion.

  According to the present invention, the support portion is formed by bending a part of the main bar. In this case, the support portion can be easily formed as compared with the case where the support portion is formed separately from the main reinforcement and is joined to the main reinforcement by welding or the like.

  The reinforcing structure of the independent foundation according to a third aspect of the present invention is the first or second aspect, wherein the main bar is formed by bending a reinforcing bar, and a pair of main bars extending in the vertical direction, and each of the main bars The support portion connecting the upper end portions, the support portion extends across the vicinity of the second anchor portion of the two adjacent building units of the four building units, The reinforcing bars of the respective second anchor portions are respectively supported by the support portions.

  According to the present invention, the main muscle is configured by integrating the pair of main muscle portions extending vertically through the support portion. In this case, since the number of main bars can be reduced compared to the structure in which each main bar part (main bar) is provided separately, the number of work man-hours when placing the main bar on the foundation (bar arrangement) at the construction site is reduced. Can be achieved. Moreover, since each reinforcement bar provided in each 2nd anchor part of two adjacent building units is each supported by the support part, each reinforcement bar of each 2nd anchor part is each a separate support part. Therefore, the number of support portions can be reduced as compared with the configuration of supporting by. Therefore, the configuration can be simplified.

  According to a fourth aspect of the invention, there is provided an independent foundation reinforcing bar arrangement structure according to the third aspect of the invention, wherein the footing portion constituting the bottom portion of the independent foundation is provided with a base reinforcing bar arrangement portion, It has a pair of mounting parts that extend laterally from the lower end parts and are mounted on the base bar arrangement part.

  According to the present invention, since a pair of placement parts extending in the lateral direction are provided at the lower end of the main bar, when placing (arranging) the main bar on the basis of the main bar at the site, these placement parts are arranged in the base arrangement. The main muscle can be arranged by placing it on the muscle portion. Thereby, the main bar arrangement work can be facilitated.

  Moreover, you may form so that a pair of mounting part may be extended to the side mutually spaced apart from the lower end part of each main muscle part. In this case, since each mounting part is arrange | positioned in the position away from each other on the base reinforcement part, it can arrange | position in a stable state. Therefore, the main bar arrangement work can be further facilitated.

  The independent foundation of the fifth invention comprises the reinforcement structure of the independent foundation of any one of the first to fourth inventions inside the foundation concrete, and the foundation concrete is composed of four corner portions in plan view. At least one of them has a cut-out shape.

  As described above, in the bar arrangement structure according to the first aspect of the present invention, only the first anchor part of the first anchor part and the second anchor part is surrounded by the hoop line, and the reinforcing bar is provided for the second anchor part. I made it. In this case, compared to the case where the first anchor portion and the second anchor portion are collectively surrounded by a single hoop line (in a rectangular shape), the size of the hoop line can be reduced. It can suppress that each principal muscle supported by is greatly located outside at the four corners of the independent foundation.

  Therefore, in the present invention, paying attention to this point, in the independent foundation having the bar arrangement structure of the first invention in the foundation concrete, at least one of the four corners of the foundation concrete is cut out. In this case, since the foundation volume can be reduced by the notch, for example, when an inner garage, an elevator, or the like is provided adjacent to the independent foundation, it is possible to suppress the space restriction caused by the independent foundation. it can.

The perspective view which shows a building unit. The perspective view which shows the state by which the building unit was installed on the foundation. The cross-sectional view which shows the structure around a pillar assembly part. The longitudinal cross-sectional view which shows the structure around a pillar assembly part. The top view which shows the bar arrangement structure of a pillar support foundation. The longitudinal cross-sectional view which shows the bar arrangement structure of a pillar support foundation. (A) is a top view which shows the structure of a standing reinforcement part, (b) is a front view. The perspective view which shows the structure of the reinforcement reinforcement for anchor parts. The longitudinal cross-sectional view which shows the arrangement structure of the reinforcement reinforcement for anchor parts. (A) is a cross-sectional view which shows a pillar assembly part, (b) is a top view which shows the reinforcement structure of an independent foundation. (A) is a cross-sectional view which shows a pillar assembly part, (b) is a top view which shows the reinforcement structure of an independent foundation.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the present embodiment, a unit type building is embodied as a building. A unit type building is a building constituted by connecting a plurality of building units to each other. First, the structure of the building unit will be described with reference to FIG. FIG. 1 is a perspective view showing a building unit.

  As shown in FIG. 1, the building unit 20 includes four columns 21 disposed at the four corners thereof, and four ceiling beams 22 and floor beams 23 that connect the upper and lower ends of each column 21, respectively. And. A rectangular frame (frame) is formed by the pillars 21, the ceiling beams 22 and the floor beams 23. The column 21 is made of a square tube-shaped square steel. The ceiling girder 22 and the floor girder 23 are made of channel steel having a U-shaped cross section, and are installed so that their openings face each other.

  A plurality of small ceiling beams 25 are bridged between the large ceiling beams 22 on the long sides of the building unit 20 at predetermined intervals. Similarly, a plurality of floor beams 26 are bridged between the large floor beams 23 on the long sides of the building unit 20 at predetermined intervals. The ceiling beam 25 and the floor beam 26 are provided at the same interval and at positions corresponding to the upper and lower sides, respectively. For example, the ceiling beam 25 is made of lip groove steel, and the floor beam 26 is made of square steel. The ceiling member 27 is supported by the ceiling beam 25 and the floor member 28 is supported by the floor beam 26.

  Next, the building 10 as a unit type building will be described with reference to FIG. FIG. 2 is a perspective view showing a state in which the building unit 20 is installed on the foundations 11 and 12. In FIG. 2, the building unit 20 on the front side of the page is not shown for convenience.

  As shown in FIG. 2, a plurality of building units 20 are installed side by side on the foundations 11 and 12. A unit type building 10 is constructed by connecting the building units 20 to each other. The foundations 11 and 12 include an outer periphery foundation 11 provided along the outer peripheral portion of the building 10 and a pillar support foundation 12 provided in an inner space (underfloor space) surrounded by the outer periphery foundation 11. The outer periphery foundation 11 consists of a reinforced concrete cloth foundation. The outer peripheral foundation 11 includes a footing portion (not shown) embedded in the floor base plate and a rising portion 11a that rises upward from the footing portion.

  The column support foundation 12 is an independent foundation made of reinforced concrete. The column support foundation 12 includes a footing portion 12a (see FIG. 3 and FIG. 4) embedded in the floor base plate and a square columnar rising portion 12b rising upward from the footing portion 12a. The column receiving foundations 12 are arranged at a plurality of locations corresponding to the installation positions of the columns 21 of the building unit 20. Further, the column support foundation 12 is connected to the outer periphery foundation 11 and other column support foundations 12 via foundation beams 13.

  The building unit 20 is installed in a state where the pillars 21 are placed on the foundations 11 and 12, respectively. Specifically, among the pillars 21 of the building unit 20, the pillars 21 arranged on the outer periphery of the building are installed on the outer foundation 11, and the pillars 21 arranged on the indoor side are installed on the pillar receiving foundation 12. Yes.

  Next, the structure of the pillar assembly part where the pillars 21 of the four adjacent building units 20 gather will be described with reference to FIGS. 3 and 4. FIG. 3 is a cross-sectional view showing the configuration around the column assembly portion, and FIG. 4 is a longitudinal cross-sectional view showing the configuration around the column assembly portion. 4 corresponds to a cross-sectional view taken along line AA in FIG.

  As shown in FIGS. 3 and 4, a column receiving foundation 12 is provided below the column assembly 30. The columnar foundation 12 (specifically, the rising portion 12b) has a rectangular shape as a whole in plan view. Specifically, the pillar support foundation 12 has its concrete portions (corresponding to foundation concrete) cut out in rectangular shapes at four corners in plan view. Thereby, the notch 15 is formed in each of the four corners of the column receiving foundation 12.

  A foundation beam 13 is provided on each side of the column receiving foundation 12. The foundation beam 13 extends laterally from a side surface of the column support foundation 12, more specifically, from an overhanging portion (fluff portion) that is not cut out by the notch portion 15 on the side surface of the column support foundation 12. In this case, the width of the foundation beam 13 is the same as the width of the overhanging portion.

  The main building 10 is provided with an inner garage 33 (an attached garage) partitioned by two orthogonal foundation beams 13. The inner garage 33 is provided adjacent to the pillar support foundation 12 (specifically, its corner).

  On the pillar receiving foundation 12, the pillars 21 of the four building units 20 are respectively installed. These pillars 21 are arranged so as to be 2 rows × 2 rows in plan view. A base plate 31 (column base plate) is fixed to the lower end of each column 21. The base plate 31 is made of a flat steel plate and is fixed to the column 21 by welding. The base plate 31 is placed on the pillar support foundation 12, and the pillar 21 is placed on the pillar support foundation 12 in the placement state.

  The base plate 31 has two projecting portions 31a projecting laterally from the two side surfaces of the column 21 to which the floor beams 23 are connected. Each overhang 31a is formed with a hole 34 penetrating in the thickness direction.

  Two floor beams 23 connected to the column 21 are fixed to the column receiving foundation 12 via anchor bolts 18 in the vicinity of the column 21. The anchor bolt 18 is fixed in a state of projecting downward from the floor girder 23 to the floor girder 23 (specifically, a lower flange 23a thereof). The anchor bolt 18 is inserted into the anchor hole 19 embedded in the column receiving foundation 12 with the protruding lower portion inserted into the hole 34 of the base plate 31 (the overhang portion 31a).

  The anchor hole 19 is made of a sheath tube, and is provided in an open state at the top end of the column receiving base 12. The anchor bolt 18 is fixed to the column receiving base 12 by solidifying filler (grout) such as mortar filled in the hole 19 in a state of being inserted into the anchor hole 19. The anchor bolt 18 corresponds to the anchor portion.

  As described above, in the column assembly portion 30, the four building units 20 are fixed to the column receiving foundation 12 by the two anchor bolts 18, respectively. In each of the four building units 20, a large floor beam 23 extends from the column 21 in two directions orthogonal to each other, and each large floor beam 23 is fixed to the column receiving foundation 12 by an anchor bolt 18.

  Here, in the four columns 21 constituting the column assembly 30, when the two directions in which two adjacent columns 21 are arranged and orthogonal to each other are defined as a first direction X and a second direction Y, respectively, The two floor beams 23 extending in the two directions from the column 21 extend in the first direction X and the second direction Y, respectively. Therefore, in the following description, for convenience, A is given to the reference numerals of the anchor bolts 18 provided on the floor beams 23 extending in the first direction X, and the anchor bolts 18 provided on the floor beams 23 extending in the second direction Y. B is attached to the code. The anchor bolt 18A corresponds to the first anchor portion, and the anchor bolt 18B corresponds to the second anchor portion.

  Next, the bar arrangement structure of the column receiving foundation 12 will be described with reference to FIGS. FIG. 5 is a plan view showing a bar arrangement structure of the column support foundation 12. FIG. 6 is a longitudinal sectional view showing the bar arrangement structure of the column support foundation 12 and corresponds to the sectional view taken along the line BB of FIG. In FIGS. 5 and 6, for convenience, the outlines of the column foundation 12 and the foundation beam 13 are indicated by two-dot chain lines (virtual lines).

  As shown in FIG.5 and FIG.6, the pillar receiving foundation 12 is equipped with the foundation reinforcement inside. The basic bar arrangement includes a base bar arrangement part 36 provided substantially horizontally in the footing part 12a and a rising bar arrangement part 37 raised upward from the base bar arrangement part 36. The base bar arrangement portion 36 includes a plurality of base bars 38 (lateral bars) arranged in a lattice pattern. Each of the base bars 38 is integrated by being fixed by welding or the like at an intersection of each other. Each base bar 38 is formed of a deformed bar.

  The rising bar arrangement portion 37 is installed on the base bar arrangement portion 36. Hereinafter, the configuration of the rising reinforcing bar portion 37 will be described with reference to FIG. 7A is a plan view showing the configuration of the rising reinforcement bar 37, and FIG. 7B is a front view.

  As shown in FIGS. 7A and 7B, the rising reinforcing bar portion 37 includes a pair of scissor muscles 41 and a plurality of hoop muscles 42 (band streaks) respectively connected to the scissor muscles 41. The hook reinforcement 41 is formed by bending a reinforcing bar (deformed reinforcing bar). The purse line 41 includes a pair of vertical bars 45 extending in the vertical direction (vertical direction), an upper horizontal bar 46 extending in the horizontal direction (horizontal direction) by connecting the upper ends of the vertical bars 45 to each other, A pair of lower lateral stripes 47 extending laterally (horizontal direction) from the lower ends of the vertical stripes 45 to the sides away from each other. In the present embodiment, each of the rotary hooks 41 has the same configuration. In addition, the hook muscle 41 corresponds to the main muscle, the vertical muscle portion 45 corresponds to the main muscle portion, the upper lateral muscle portion 46 corresponds to the support portion, and the lower lateral muscle portion 47 corresponds to the placement portion.

  Each rotary hook 41 is provided side by side at a predetermined interval. In this case, each of the stirrups 41 is arranged so as to be parallel to each other in plan view.

  The hoop bars 42 are formed in a quadrangular annular shape by reinforcing bars (deformed reinforcing bars), and more specifically, a rectangular ring shape. The hoop muscles 42 are provided so as to bundle the vertical stripe portions 45 of the pair of hook-skin muscles 41 from the outside. The hoop line 42 is arranged with its longitudinal direction (in other words, the long side direction) oriented in the direction in which the hook hook line 41 extends. Each vertical streak 45 is located inside the four corners of the hoop line 42. The hoop bars 42 are coupled to the vertical bars 45 at the four corner positions using wires such as wires. Further, a plurality (specifically, three) of hoop lines 42 are arranged at predetermined intervals (equal intervals) in the vertical direction.

  As shown in FIG. 5 and FIG. 6, the rising reinforcing bar portion 37 is installed in a state where the lower lateral reinforcing bar portion 47 of each hook-and-loop bar 41 is placed on the base reinforcing bar portion 36. In the rising reinforcing bar portion 37, the hook reinforcements 41 are arranged at positions on both sides of the four anchor bolts 18 </ b> A in the second direction Y, respectively. Specifically, each of the stirrups 41 is disposed at a position between the anchor bolts 18A and 18B of the same building unit 20 in the second direction Y. In this case, each hoop line 41 extends along the first direction X, and each upper lateral bar 46 extends to each anchor bolt 18A, 18B of the two building units 20 adjacent to each other in the first direction X. It extends to straddle.

  Each hoop line 42 is arranged so as to surround each anchor bolt 18A (anchor hole 19A). Specifically, each hoop line 42 is disposed so as to surround only the anchor bolt 18A among the anchor bolts 18A and 18B. In this case, (all) each anchor bolt 18A is located inside the hoop line 42, and (all) each anchor bolt 18B is located outside the hoop line 42. The hoop bars 42 prevent the pillar receiving foundation 12 from peeling off around the anchor bolt 18A.

  On the rising portion 12b of the column receiving foundation 12, anchor reinforcing bars 50 are provided for the respective anchor bolts 18B. Hereinafter, the configuration of the anchor reinforcement 50 will be described with reference to FIG. FIG. 8 is a perspective view showing the configuration of the anchor reinforcing bar 50 (hereinafter simply referred to as the reinforcing bar 50).

  As shown in FIG. 8, the reinforcing bar 50 is formed in a cage shape by combining a plurality of reinforcing bars. The reinforcing bar 50 includes a pair of reinforcing bars 52 having the same basic configuration. The reinforcing bar material 52 is formed by bending a reinforcing bar (deformed reinforcing bar). The reinforcing bar 52 has a horizontal portion 53 and a connecting portion 54 that extend in the horizontal direction, and a vertical portion 55 that extends in the vertical direction. In each reinforcing bar 52, a pair of connecting portions 54 are formed at both ends of the horizontal portion 53, and a vertical portion 55 is formed at each end of the connecting portions 54 (end opposite to the horizontal portion 53). Has been. The horizontal portion 53 and the coupling portion 54 are formed in a state bent vertically in a horizontal plane, and the coupling portion 54 and the vertical portion 55 are formed in a state bent vertically in a vertical plane. The reinforcing bars 52 are superposed on each other in a state where they are arranged in opposite directions, and the superposed joints 54 are joined together by a joint fitting 56 to be integrated. ing.

  In view of the point that the reinforcing bars 50 are formed in a cage shape, the reinforcing bars 50 can also be referred to as cage reinforcing bars.

  In a state in which the reinforcing bars 52 are integrated, a rectangular annular surrounding portion 58 is formed by the horizontal portion 53 and the connecting portion 54 of the reinforcing bars 52. An inner portion surrounded by the surrounding portion 58 is an anchor insertion portion 59 into which the anchor bolt 18 (anchor hole 19) is inserted.

  Each rebar member 52 is provided with a plurality of crack prevention bars 61 that are stretched over a pair of vertical portions 55. The crack prevention bars 61 are provided at predetermined intervals in the longitudinal direction of the vertical portion 55, and are fixed to the vertical portion 55 by welding or the like.

  The reinforcing bar 50 further includes a pair of supported parts 62 provided so as to be bridged over the vertical part 55 of each reinforcing bar material 52. The supported part 62 is formed of a metal bar (round bar), and is fixed to each vertical part 55 by welding at both ends thereof. One supported portion 62 of the supported portions 62 is bridged between the one vertical portions 55 of the reinforcing bars 52, and the other supported portion 62 is the other vertical portion of the reinforcing bars 52. It is bridged between 55s. Each supported portion 62 is disposed below the coupling portion 54 and in parallel with the coupling portion 54, and is located at the same position (same height position) as viewed in the vertical direction (longitudinal direction of the vertical portion 55). Yes.

  Next, the arrangement configuration of the reinforcing bars 50 in the column receiving foundation 12 will be described with reference to FIG. 9 in addition to FIGS. 5 and 6. FIG. 9 is a longitudinal sectional view showing the arrangement configuration of the reinforcing bars 50, and corresponds to the sectional view taken along the line CC of FIG.

  As shown in FIGS. 5, 6, and 9, the reinforcing bar 50 is provided for each anchor bolt 18 </ b> B (anchor hole 19 </ b> B) at the rising portion 12 b of the column base 12. Each of these reinforcing bars 50 has the same configuration. Each reinforcing bar 50 is provided in a state where the anchor bolt 18B (anchor hole 19B) is inserted through the anchor insertion part 59.

  Each reinforcing bar 50 is provided in a state in which the supported part 62 is supported on the upper lateral bar part 46 of the hook-skin bar 41. In this case, the reinforcing bars 50 provided on the anchor bolts 18B of the two building units 20 adjacent to each other in the first direction X are supported by the upper horizontal reinforcing bar portion 46 of the same hooking bar 41. In other words, in the present embodiment, two reinforcing bars 50 are supported on the upper lateral reinforcing bar portion 46 of each of the hook-shaped bars 41.

  The surrounding portions 58 of the reinforcing bars 50 are provided so as to surround the periphery of the anchor bolt 18B (anchor hole 19B). The surrounding part 58 is located in the vicinity of the upper end part in the rising part 12b. A portion of the surrounding portion 58 that is disposed outside the pillar support foundation 12 rather than the anchor bolt 18B (inside thereof) is a peeling prevention portion 64. Specifically, in the surrounding portion 58, the coupling portion 54 located on the outer side of the foundation as viewed in the first direction X and the outer side of the anchor bolt 18 </ b> B as seen in the second direction Y. The horizontal portion 53 is a peeling prevention portion 64. The peeling prevention portion 64 prevents the pillar receiving foundation 12 from peeling off around the anchor bolt 18B.

  Of the crack prevention bars 61 provided on each reinforcing bar 52, the crack prevention bars 61 arranged on the outer side of the foundation in the second direction Y from the anchor bolt 18B are crack prevention portions. The crack preventing portion prevents the pillar support foundation 12 from cracking around the anchor bolt 18B.

  The above is the description regarding the bar arrangement structure of the column receiving foundation 12.

  5 and 6 show the bar arrangement structure inside the foundation beam 13 in addition to the bar arrangement structure of the column support foundation 12. Briefly describing this bar arrangement structure, beam arrangement portions 71 extending in the longitudinal direction of the foundation beam 13 are provided inside each foundation beam 13. The beam reinforcing portion 71 includes a plurality of main bars 72 extending in the longitudinal direction of the foundation beam 13 and a plurality of stirrups 73 (stirrup) provided so as to bundle the plurality of main bars 72. The plurality of ribs 73 are arranged at a predetermined interval along the longitudinal direction of the main bar 72. In the configuration shown in the figure, the beam bar arrangement 71 in the foundation beam 13 extending in the second direction Y extends across the foundation beams 13 on both sides of the foundation 12 via the inside of the column receiving foundation 12. It extends.

  As mentioned above, according to the structure of this embodiment explained in full detail, the following outstanding effects are acquired.

  In the configuration in which the four building units 20 are fixed to the pillar support foundation 12 with two anchor bolts 18A and 18B, respectively, and the hoop bars 42 are provided so as to surround the anchor bolts 18A of each building unit 20. It is possible to prevent the pillar support foundation 12 from peeling off in the vicinity. On the other hand, the anchor bolts 18B of each building unit 20 are not surrounded by the hoop bars 42, and instead, reinforcing bars 50 are provided for the respective anchor bolts 18B. In this case, since the portion arranged outside the foundation with respect to the anchor bolt 18B (inside thereof) in the surrounding portion 58 becomes the peeling prevention portion 64, the pillar receiving foundation 12 around the anchor bolt 18B is prevented from falling off. Can do.

  In addition, an upper horizontal streak portion 46 extending in the lateral direction is provided on the hook hook muscle 41 (main muscle) extending in the up-down direction, and the supported portion 62 of the reinforcing bar 50 is supported on the upper horizontal streak portion 46 so that the reinforcing bar 50 is arranged. I made it. In this case, when the reinforcing bar 50 is arranged (reinforced) on the column base 12 at the construction site, the reinforcing bar 50 is arranged by a simple operation such as placing the supported portion 62 on the upper lateral reinforcing bar portion 46. Can do. For this reason, even after the hoop bars 42 surrounding the anchor bolts 18A are arranged, the reinforcing bars 50 can be easily arranged for the anchor bolts 18B. Therefore, it is possible to prevent the pillar support foundation 12 from peeling off while facilitating the bar arrangement work on site.

  By the way, it is possible to prevent the pillar foundation 12 from being peeled around the anchor bolts 18A and 18B by enclosing the anchor bolts 18A and 18B together by a single hoop line (in a rectangular shape). However, in this case, the size of the hoop muscle in plan view increases in each of the first direction X and the second direction Y, and the main muscles that support the hoop muscle at the four corners are at the four corners of the column base 12. It can be considered that it is located greatly outside. On the other hand, in the above-described reinforcing bar arrangement, the hoop bars 42 are provided so as to surround only the anchor bolts 18A. Therefore, the size of the hoop bars 42 only needs to be increased at least in the first direction X. Therefore, as compared with the case where the anchor bolts 18A and 18B are collectively surrounded by one hoop line, it is not necessary to arrange the main bars (longitudinal bar portions 45) so as to be positioned largely outside at the four corners of the independent foundation. Therefore, in the above embodiment, paying attention to this point, the notch portions 15 are provided at the four corners of the column base 12 respectively. In this case, since the foundation volume can be reduced by the amount of the notch 15, the inner garage 33 is limited in space when the inner garage 33 is provided adjacent to the pillar support foundation 12. Can be suppressed.

  The main reinforcing bar (stile hook 41) extending vertically is bent laterally at the upper end portion thereof, and the upper horizontal reinforcing bar portion 46 (supporting portion) for supporting the reinforcing bars 50 is formed by the horizontal portion. In this case, since the support portion is formed by a part of the main reinforcement, the support portion can be easily formed as compared with the case where the support portion is formed separately from the main reinforcement and joined to the main reinforcement by welding or the like.

  Since the main muscle (hatchle muscle 41) has a pair of longitudinal muscle portions 45 and an upper lateral muscle portion 46 that connects the upper end portions of the pair of longitudinal muscle portions 45, the longitudinal muscle portions are provided separately. The number of main muscles can be reduced as compared with the configuration. Therefore, it is possible to reduce the work man-hours when placing (laying out) the main bars on the basis of the construction site.

  Further, since the reinforcing bars 50 provided on the respective anchor bolts 18B of the two adjacent building units 20 are supported on the upper lateral reinforcing bars 46 (supporting parts), the reinforcing bars 50 of the respective anchor bolts 18B are provided. The number of support portions can be reduced as compared with the configuration in which each support portion supports. Therefore, the configuration can be simplified.

  A pair of lower horizontal stripes 47 extending laterally from the lower end of each vertical stripe 45 are provided on the main reinforcement (spindle reinforcement 41), and these lower horizontal stripes 47 are provided on the footing portion 12a of the column support foundation 12. It was placed on the base bar arrangement part 36. In this case, when the main bars are arranged (reinforcement) on the column support foundation 12 at the site, the main bars can be arranged by placing the lower lateral reinforcement parts 47 on the base reinforcement part 36. The main bar arrangement work can be facilitated.

  Further, by providing the pair of lower lateral stripe portions 47 so as to extend from the lower end portions of the respective vertical stripe portions 45 to the sides away from each other, the main stripes are formed as the hook-like hook stripes 41. In this case, since the lower lateral reinforcing bars 47 are arranged at positions separated from each other on the base reinforcing bar part 36, the main reinforcing bars (stiles 41) can be arranged in a stable state. Therefore, the main bar arrangement work can be further facilitated.

  The present invention is not limited to the above embodiment, and may be implemented as follows, for example.

  (1) In the above-described embodiment, the main muscle extending in the vertical direction is formed into a hook-like shape to form the hook-like muscle 41, but the shape of the main muscle is not necessarily limited thereto. For example, the main bar has a vertical bar part extending in the vertical direction, an upper horizontal bar part (corresponding to a support part) and a lower horizontal bar part extending horizontally from the upper and lower ends of the vertical bar part to the opposite sides. It can be considered to form a mold. In this case, the main muscles are arranged at the four corners of the hoop muscle 42, and the vertical muscle portions of the four main muscles are coupled to the hoop muscle 42, respectively. And the upper side horizontal stripe part of each main reinforcement is arranged near each anchor bolt 18B, respectively. Even in such a configuration, it is possible to support the reinforcing bars 50 (specifically, supported parts 62) of the anchor bolts 18B on the upper lateral bars of the main bars.

  Further, in the above embodiment, in the scoop muscle 41 (main muscle), each lower lateral muscle portion 47 (mounting portion) is provided so as to extend laterally from the lower end portion of each longitudinal muscle portion 45 to the side away from each other. By changing this, each lower lateral stripe 47 may be provided so as to extend laterally from the lower end of each vertical stripe 45 in a direction perpendicular to the longitudinal direction of the upper lateral stripe 46. Even in this case, the main bars can be arranged in a state in which the respective lower lateral bar parts 47 are placed on the base bar arrangement part 36. Moreover, you may make it not provide the lower side horizontal stripe part 47 in a main reinforcement.

  (2) In the above embodiment, the upper lateral muscle portion 46 as the support portion is formed by a part of the hook muscle 41 as the main muscle, but the support portion may be formed separately from the main muscle. For example, a pair of L-shaped main muscles having a vertical bar portion 45 and a lower horizontal bar portion 47 is formed, and the upper end portions of the pair of main bars are the horizontal bars (corresponding to the support portion) constituting the upper horizontal bar portion 46. ) May be hooked.

  (3) In addition to arranging the main bars (vertical bars 45) at the four corner positions of the hoop line 42, the main bars (longitudinal line part 45) may be arranged at an intermediate position of the hoop line 42. In this case, for example, the main bars arranged at the four corner positions may be configured to have a support portion, and the main bars arranged at the intermediate position may be configured to have no support portion.

  (4) The configuration of the reinforcing bar 50 is not necessarily limited to that of the above embodiment. In the above embodiment, the reinforcing bar 50 is configured to include a pair of reinforcing bars 52 and the surrounding part 58 is formed by the pair of reinforcing bars 52 (reinforcing bars). For example, the surrounding part 58 is formed as a single square reinforcing bar. May be formed.

  Moreover, in the said embodiment, although the surrounding part 58 was formed in the closed ring shape, you may form the surrounding part 58 in the cyclic | annular form with an open part. For example, it can be considered that the surrounding portion 58 is formed by bending a reinforcing bar into a U-shape. Also in this case, if the reinforcing bar 50 is disposed in a state where the anchor bolt 18B is positioned inside the surrounding portion 58 having a U-shape, the surrounding portion 58 is provided so as to surround the anchor bolt 18B. And the part arrange | positioned in the enclosure part 58 in the foundation outer side rather than the anchor bolt 18B functions as a peeling prevention part. Therefore, also in this case, it is possible to prevent the pillar foundation 12 from peeling off.

  (5) In the above embodiment, the crack preventing bars 61 are provided on the reinforcing bars 50, but the crack preventing bars 61 may not be provided on the reinforcing bars 50.

  (6) From the viewpoint of the degree of freedom in the height direction of the peeling prevention portion 64 (the surrounding portion 58), the relative position in the height direction between the peeling prevention portion 64 and the supported portion 62 is preferably adjustable. For example, it is conceivable that the coupling position of the supported portion 62 with respect to the vertical portion 55 can be adjusted in the longitudinal direction of the vertical portion 55. Specifically, the supported portion 62 is detachably attached to the vertical portion 55 via a coupling member such as a hook, and the supported portion 62 is appropriately attached to the vertical portion 55 at the construction site. It is conceivable to install it at a height. According to this, by adjusting the relative height position of the peeling prevention part 64 and the supported part 62, it does not depend on the height position of the upper horizontal streak part 46 of the stirrup 41 in the rising part 12b, and the site. It is possible to set the covering amount in the height direction suitable for each environment difference. For example, since concrete is likely to be neutralized near the coast, it is better that the amount of covering in the height direction is large. Therefore, it is possible to flexibly cope with the difference in the field environment without preparing a large number of parts with different relative height positions between the peeling prevention part 64 and the supported part 62.

  (7) If the reinforcing bar 50 can be arranged at an appropriate height position in the column receiving foundation 12 (specifically, if the covering thickness in the height direction of the surrounding portion 58 can be set to an appropriate dimension), the reinforcing bar 50 is It may be supported by the hoop muscle 42. In this case, it is conceivable to arrange the reinforcing bars 50 by supporting the supported portion 62 on the hoop bars 42 arranged at the highest position among the hoop bars 42.

  (8) In the above embodiment, the four adjacent building units 20 are fixed to the pillar foundation 12 by the two anchor bolts 18 </ b> A and 18 </ b> B, respectively, but any one to three building units 20 out of the four building units 20. Can be fixed to the column base 12 with two anchor bolts 18A and 18B, and the other building unit 20 can be fixed to the column base 12 with one anchor bolt 18A. Also in this case, by providing the reinforcing bars 50 for each anchor bolt 18B, it is possible to prevent foundation peeling around the anchor bolts 18 while facilitating the bar arrangement work at the construction site.

  Further, in the configuration in which the anchor bolt 18 is surrounded by the hoop to prevent the foundation from peeling off (see FIG. 11B), only one of the four building units 20 is replaced with the two anchor bolts 18A and 18B. In this case, it is considered that it is necessary to provide another hoop bar surrounding the anchor bolt 18B in addition to the hoop bar surrounding each anchor bolt 18A. Therefore, even when only one building unit 20 of the four building units 20 is fixed to the pillar support foundation 12 with the two anchor bolts 18A and 18B, the four building units 20 are fixed with the two anchor bolts 18A and 18B, respectively. It is conceivable that the same hoop reinforcement arrangement work occurs as in the case of doing this. In that respect, according to the above-described configuration in which the reinforcing bars 50 are arranged for each anchor bolt 18B to prevent the foundation from peeling off, if the number of the anchor bolts 18B is small, that is, the column supports are formed by the two anchor bolts 18A and 18B. If the number of building units 20 to be fixed to the foundation 12 is small, the number of reinforcing bars 50 is reduced correspondingly, so that there is an advantage that the on-site bar arrangement work can be facilitated.

  (9) In the above-described embodiment, the notch portions 15 are provided at the four corners of the column support foundation 12, respectively, but the notch portions 15 may be provided only at any one to three corners of the four corners. Good. For example, it is conceivable to provide the notches 15 only at the corners adjacent to the inner garage 33 among the four corners of the column support foundation 12.

  Moreover, in the said embodiment, although the inner garage 33 was provided adjacent to the pillar receiving foundation 12, the case where an elevator is provided adjacent to the pillar receiving foundation 12, for example is also considered. Even in that case, it is possible to suppress the restriction of the elevator arrangement space by reducing the foundation volume of the column receiving foundation 12 by the notch 15. In addition, you may make it not provide the notch part 15 in the pillar receiving base 12. FIG.

  (10) In the above embodiment, the floor girder 23 of the building unit 20 is fixed to the column receiving foundation 12 by the anchor bolt 18, but each overhanging portion 31 a of the base plate 31 of the column 21 is fixed by the anchor bolt 18. May be.

  DESCRIPTION OF SYMBOLS 10 ... Building, 11 ... Perimeter foundation, 12 ... Pillar support foundation as independent foundation, 12a ... Footing part, 18 ... Anchor bolt as anchor part, 18A ... Anchor bolt as 1st anchor part, 18B ... 2nd anchor part Anchor bolts as 20, building units, 21 pillars, 23 large beams as floor beams, 30 column gathering parts, 36 base reinforcements, 41 stirrups as main bars, 42 hoops, 45 ... longitudinal streaks as main streaks, 46 ... upper lateral streaks as support parts, 47 ... lower lateral streaks as mounting parts, 50 ... reinforcing bars, 58 ... enclosed parts, 62 ... supported parts, 64 ... peeling off Prevention part, X ... 1st direction, Y ... 2nd direction.

Claims (5)

A plurality of building units arranged side by side on the foundation;
An independent foundation as the foundation, provided corresponding to a pillar assembly part where each pillar of the four building units gathers, and each pillar constituting the pillar assembly part installed above;
When the two adjacent pillars of the four pillars constituting the pillar assembly portion are arranged side by side and the directions perpendicular to each other are defined as the first direction and the second direction, respectively, Each of the building units is fixed to the independent foundation via a first anchor portion outside the column assembly portion in the first direction with respect to the column,
At least one of the four building units is a unit type that is fixed to the independent foundation via a second anchor part outside the pillar assembly part in the second direction with respect to the pillar. In the building of
A bar arrangement applied to the independent foundation,
A plurality of main muscles extending vertically;
A hoop line provided so as to surround each of the main bars, and arranged such that each of the first anchor parts is located on the inside and the second anchor part is located on the outside;
A reinforcing bar provided for each of the second anchor portions,
The reinforcing bar is provided so as to surround the second anchor portion, and has a surrounding portion in which a portion disposed outside the independent foundation with respect to the second anchor portion is a peeling prevention portion,
At least one of the plurality of main bars is provided with a support portion that extends sideways and supports the reinforcing bars,
The reinforcing bar has a supported part supported on the support part, and the reinforcing structure of the independent foundation is characterized in that it has a supported part.   The independent bar arrangement structure according to claim 1, wherein the main bar is bent laterally at an upper end portion thereof, and the support portion is formed by the horizontal portion. The main reinforcing bar is formed by bending a reinforcing bar, and has a pair of main reinforcing bars extending in the vertical direction, and the support part connecting the upper ends of the main reinforcing bars,
The support portion extends over the vicinity of the second anchor portions of two adjacent building units among the four building units,
The reinforcement structure of the independent foundation according to claim 1 or 2, wherein the reinforcing bars of each of the second anchor portions are supported by the support portions. A base bar arrangement portion is provided in the footing portion constituting the bottom portion of the independent foundation,
The arrangement of the independent foundation according to claim 3, wherein the main bars have a pair of placement portions that extend laterally from the lower end portions of the main reinforcement portions and are placed on the base reinforcement portions. Muscle structure. An independent foundation comprising the reinforcement structure of the independent foundation according to any one of claims 1 to 4 inside the foundation concrete,
The foundation foundation has a shape in which at least one of four corner portions in a plan view is cut out.

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