JP5221748B2 - Recessed column base sheath tube - Google Patents

Description

  The present invention is an embedded column base in which the lower end of a building column is embedded in a concrete foundation, set in advance in the concrete foundation, inserted into the opening from the top surface, and filled with grout in the gap and fixed. In particular, the present invention relates to a sheathed tube of an embedded column base that can prevent the side surface of the column from being pulled out.

  Pillars of buildings (including workpieces) are erected on concrete foundations that are placed in the ground or at low levels above the ground. The column base near the bottom of the column is fixed to the concrete foundation in various ways. Of these, the embedded type column base is a method of embedding the column base part in the concrete foundation, but in the past, the column type main reinforcement is standing and exposed in the hole dug in the ground. The concrete foundation was hit to the height, a long column was installed between the column main bars, and the remaining concrete foundation was hit to fill the column main bars and column bases. This method has the advantage that the horizontal and vertical sizes of the concrete foundation can be reduced compared to the case of using anchor bolts. On the other hand, the work of standing long pillars with holes in the ground As a result, work efficiency was poor and dangerous. The sheath pipe is used to stand the pillar after the concrete foundation is completed, and this is a pipe that is slightly thicker than the pillar set in the concrete foundation so as to open on the top surface of the concrete foundation. An embedded column base can be constructed by inserting a column into the tube and filling the gap with grout. In such an embedded column base using a sheath tube, when bending stress is applied to the column, the lower end of the column protrudes in the horizontal direction, and there is a possibility that the side surface of the column is pulled out to break the concrete foundation. Japanese Patent Laid-Open No. 5-195539 discloses that a mold 2 of a box-type embedded column base is made of a steel plate with a rib, whereby the mold 2 and the filler 3 are firmly fixed by the rib 4 of the steel plate with a rib. A configuration is disclosed. In Japanese Patent Application Laid-Open No. 2004-116199, an intermediate connecting member 18 is fitted and welded to the lower end portion 11a of the steel column 11, and is formed at the end of the main reinforcing bar 16 in screw holes formed at both ends of the intermediate connecting member 18. A configuration in which the formed male screw is screwed is disclosed. In JP 2009-235871 A, an intermediate connecting member 8 is fitted and welded to the lower end portion 4 a of the steel column 4, and the intermediate connecting member 8 is formed with a latching hole 10 penetrating in the vertical direction. And the structure by which the bending part 12a which bent the edge part of the main rebar 12 is inserted and latched from upper direction is disclosed. Japanese Patent Application Laid-Open No. 2008-2109 discloses a structure of a column base portion in which a protruding portion of an anchor bolt embedded in a foundation is inserted into an anchor bolt insertion hole of a base plate and tightened with a nut.

JP-A-5-195539 JP 2004-116199 A JP 2009-235871 A JP 2008-2109 A

Accordingly, an object of the present invention is to provide an embedded column base sheath that can prevent the side surface of the column from being pulled out.
Another object of the present invention is to provide an embedded column base sheath that can be built in a short time without swinging the column.
Still another object of the present invention is to provide an embedded column base sheath that can obtain high column core accuracy by positioning the column inserted in the sheath in the horizontal direction.

In order to achieve the above-mentioned object, the present invention fixes a pillar to a concrete foundation by embedding a sheath pipe having an open top surface in a concrete foundation, inserting a pillar from the top face of the sheath pipe and filling a gap with a grout. In the sheath tube, the outer surface of the sheath tube is
Both the front side facing the foundation beam side and the two sides facing each other perpendicular to the concrete foundation beam side
At least one connecting means connected to a beam main bar extending from the concrete foundation beam, the beam main bar extending horizontally from the concrete foundation beam,
At least near the both sides facing the two directions perpendicular to the concrete foundation beam side of the sheath.
The connecting means extends on an outer surface other than the front side facing the concrete foundation beam side of the sheath tube.
An embedded column base sheath was constructed so that the beam main bars were provided .

  In the embedded column base sheath according to the present invention, at least one connecting means is provided on the outer surface of the sheath embedded in the concrete foundation, and the main beam extending from the concrete foundation beam is connected. ing. Therefore, even if a large bending stress is generated in the case of an earthquake or the like in a column fixed by being inserted into the sheath tube, the main beam connected to the sheath tube will resist the stress transmitted from the column to the sheath tube. To do. The column into which the sheath is inserted can be of various cross-sectional shapes such as prismatic, columnar, H-shaped steel, etc., but the sheath is almost the same as the outer shape of the column and the cross section is slightly larger. It is preferable to have a shape inner peripheral surface.

  Also, the present invention is provided around the inner surface of the sheath tube in an axial direction so as to protrude in the axial direction, and is in contact with the outer surface of the column when the column is inserted, It further includes a plurality of anti-swaying tools for urging the columns in directions in which the outer side surfaces of the columns are separated from the inner side surfaces of the sheaths.

  When the pillars are suspended by a crane or the like and inserted into the sheath pipe, multiple steady rests are provided around the pillar so that the outer peripheral surface of the pillar protrudes in the axial direction from the inner surface of the sheath pipe. Abut against the tool. The multiple anti-skid devices urge the column in a direction in which the outer surface of the column is separated from the inner surface of the sheath, so that the column does not shake in the sheath and the shaft has a shaft center with the sheath tube. It can be built with high accuracy at the coincident horizontal position. If the column is a prism, a plurality of anti-rest devices are provided, and the column may be configured to abut against the four side surfaces of the prism. Such a plurality of anti-rest devices are each made of a steel plate bent so as to form a generally square shape, with one straight portion of the square shape facing downward and the other straight portion facing downward. It can be configured by welding to the inner surface of the sheath so as to be in a posture. In addition, the sheath tube can adjust the horizontal position of the column in the sheath tube, and can be configured to have a detachable column positioning mechanism.

Further, in the present invention, the sheath tube has a prismatic shape, and the beam main bars are a pair of beam main bars parallel to the concrete foundation beam in the horizontal direction, and the ends of the set of beam main bars are It reaches a position beyond the outermost surface farthest away from the concrete foundation beam, and the connecting means is provided on the outer outer surface of the sheath tube, and both ends extend beyond the left and right outer surfaces of the sheath tube. The embedded column base sheath is constructed so that the vicinity of the ends of the set of beam main bars is connected near both ends.

Furthermore, the present invention, the sheath tube is prismatic, the beam main reinforcement is the con of the sheath tube
Passing near one of the left and right outer surfaces of the sheath adjacent to the outer surface closest to the cleat foundation beam , the outermost surface farthest from the concrete foundation beam of the sheath and the left and right The right and left outer surfaces that are bent at a right angle in the horizontal direction at a connecting portion with either one of the outer side surfaces and pass near the outer side surface of the inner side and face either the outer side surface of the inner side or the left and right outer side surfaces A U-shaped beam main bar that is bent at a right angle in the horizontal direction at the connecting portion with the other and passes near the other of the left and right outer surfaces and extends to the concrete foundation beam, and the connecting means includes the right and left of the sheath pipe Embedded column base sheaths so that the portions of the U-shaped beam main bars extending near both the left and right outer surfaces are inserted and connected respectively. Configured.

Still further, in the present invention, the sheath tube has a prismatic shape, and the beam main bars are a pair of beam main bars parallel to the concrete foundation beam in a horizontal direction, and the pair of beam main bars are the sheath bars. Extending near the left and right outer surfaces of the pipe to a position where the ends of the pair of beam main bars do not reach the outermost surface farthest away from the concrete foundation beam, the connecting means is provided on the left and right outer sides of the sheath pipe. The embedded column base sheath is configured to be provided on both side surfaces and to be connected to the vicinity of the ends of the pair of beam main bars near the left and right outer surfaces of the sheath tube.

  As described above, according to the sheath of the embedded column base according to the present invention, the beam main bar is connected to the side surface of the sheath tube, so that the side surface of the column inserted into the sheath tube can be prevented from being pulled out. .

FIG. 1 is a plan view showing a column base portion of a building using the embedded column base sheath according to the first embodiment of the present invention, with a part of concrete cut away. FIG. 2 is a front view showing the column base portion of the building of FIG. FIG. 3 is a plan view showing a sheath tube of the embedded column base according to the first embodiment of FIG. FIG. 4 is a plan view showing a state in which a column positioning mechanism is attached to a sheath tube of the embedded column base according to the first embodiment of FIG. FIG. 5 is a front view showing the internal structure of the first embodiment of FIG. FIG. 6 is a view similar to FIG. 1 using the second embodiment of the embedded column base sheath according to the present invention. FIG. 7 is a front view showing the column base portion of the building of FIG. FIG. 8 is a view similar to FIG. 1 using the third embodiment of the embedded column base sheath according to the present invention. FIG. 9 is a front view showing the column base portion of the building of FIG.

  Hereinafter, the best mode of a column base part of a building concerning the present invention and its fixing method is explained in detail, referring to drawings. The following description is for the purpose of understanding the invention more deeply and is not intended to limit the scope of the claims.

[First Embodiment]
1 and 2 show a column base portion of a building using the first embodiment of the embedded column base sheath according to the present invention. In each drawing, a prismatic sheath 10 having an open top surface is embedded in a concrete pillar base 20 made of concrete that is thicker than the sheath 10. Concrete foundation beams 30 and 40 are respectively connected to the sides of the foundation column 20. In each foundation beam 30, 40, eight beam main bars 50, 60 each run in pairs of two parallel to the horizontal direction, with four sets running at intervals in the vertical direction. It extends to the inside. A stirrup 70 is bridged between the main beam bars 50 and 60. Below the foundation column 20, a sub-column non-shrink mortar layer 88, a footing foundation 80, abandoned concrete 82, and a groundwork 84 are provided in this order (not shown in FIG. 1). A plurality of columnar main bars 86 extend from the footing foundation 80 to the foundation column mold 20 so as to surround the sheath 10, but the illustration is omitted in FIG. 2 for explanation. In the sheath tube 10, a prism 90 is inserted into the opening on the upper surface from above, and the grout 100 is filled in the gap between the sheath tube 10 and the column 90, thereby fixing the column 90 to the basic column mold 20. .

  On the outer surface of the sheath tube 10, a bending restraint fitting 12 to which the beam main bars 50 and 60 are connected is attached. The bending restraint fitting 12 is welded on a surface having a shape that follows the outer surface of the sheath 10 and is disposed so as to cross one outer surface of the sheath 10 in the left-right direction. The insertion holes 14 provided at both ends are provided. 14, a pair of beam main bars 50, 60 with male threads cut at the ends are inserted, and the ends are stopped and connected by the nut 15, so that the beam main bars 50, 60 restrain the sheath tube 10. That is, for the sake of explanation, assuming that the foundation beam 30 is on the near side, a set of beam main bars 50 extend from the foundation beam 30 near the left and right outer surfaces 162, 164 of the sheath 10 and the tip of the beam main bar 50 is the foundation beam. It reaches a position beyond the outermost surface 166 farthest from 30. The bending restraint fitting 12 is welded to the outer surface 166 at the back of the sheath 10, both ends extend beyond the left and right outer surfaces 162, 164, are inserted into the insertion holes 14, 14 at both ends, and are fastened with nuts 15. As a result, the ends of the pair of beam main bars 50 are joined to each other. The main purpose of the bending restraint bracket 12 is to extract the side surface of the column 90, and therefore the column 90 built at the corner of the building as shown in the figure is connected to the foundation beams 30 and 40 of the foundation column type 20. The column 90 is attached only to the back outer side surface 166 and the left outer side surface 164 so that the column 90 is not drawn out to the side surface. The other corner pillars of the building shown in the figure have bending restraint fittings 12 attached to the two adjacent outer faces in the same manner as the sheath 10 shown in the figure, and the other pillars have only the outer faces facing the outdoors. It may be attached or none may be attached.

  As shown well in FIG. 3, from the upper surface where the sheath tube 10 is opened, four positioning bolt receivers 17 having a female screw whose upper surface is opened project outward in the radial direction. 171 is detachably attached. Each of the positioning bolt receivers 17 is arranged in pairs so as to sandwich the opposing apex of the sheath 10 having a substantially square shape in plan view, and a positioning device 171 is attached to each group one by one. As shown in FIG. 4, an L-shaped lower positioning plate 172 and an upper positioning plate 174 in a plan view are superimposed on each set of positioning bolt receivers 17, and four bolts 176 are attached to a washer 177 and elongated holes 178, 179. The positioning device 171 for positioning the column 90 in the sheath tube 10 in the horizontal direction is configured by stopping through. The inner edge of the upper positioning plate 174 that is in contact with the L-shaped column 19 has a shape that follows the outer surface including the apex of the column 19, and the two long holes 178 of the upper positioning plate 174 are in the vertical direction as viewed in FIG. Since the elongated holes 179 of the lower positioning plate 172 extend in the left-right direction as viewed in FIG. 4 so as to be orthogonal to each other, the upper positioning plate 174 moves in the up-down, left-right direction as viewed in FIG. 4 when each bolt 176 is loosened. Can do. Therefore, in the step of inserting the column 90 into the sheath tube 10, the horizontal position of the column 90 is adjusted by moving the two upper positioning plates 174 in the vertical and horizontal directions while contacting the outer surface of the column 90. can do. When the position of the pillar 90 is determined, the bolt 176 is tightened to fix the position of the pillar 90, and when the grout 100 is solidified in a subsequent process, the bolt 176 can be removed and the positioning device 171 can be removed.

  As shown well in FIG. 5, each of the four inner side surfaces of the sheath tube 10 is provided with a steady-state preventing tool 18 that protrudes in the axial direction. The four steady rest preventers 18 are made of thin steel plates bent so as to form a generally U-shaped shape so that one straight line portion of the V-shaped shape faces the other straight line portion downward. In addition, it is constructed by welding to the inner side surface of the sheath tube 10, the free end of the U-shaped anti-rest device 18 welded to one inner surface of the sheath tube 10, and one of the sheath tube 10. The distance between the free end of the U-shaped anti-rest device 18 welded to the inner surface facing the inner surface is the distance between one outer surface of the column 90 and the outer surface facing the outer surface. A little bigger than. Therefore, when the column 90 is suspended by the crane and the column 90 is inserted into the sheath tube 10, the steady rests 18 come into contact with the outer surface of the column, and the outer surface of the column 90 is the inner surface of the sheath tube 10. Since the pillars 90 are urged in the directions away from each other, the swinging of the pillars can be stopped in a short time, and the work can be performed efficiently. Further, the four anti-rest devices 18 respectively push the pillar 90 equally in the axial direction, and the pillar 90 is arranged at a position where the axis of the pillar 90 and the sheath 10 coincide with each other. The force applied by the prevention tool 18 is not so great as to hinder positioning by the positioning device 171, and the column 90 can be easily pushed in a direction in which the dogleg shape becomes a straight line.

  A level adjusting plate 19 that adjusts the level of the column 90 is disposed on the bottom surface of the sheath 10 between the bottom surface of the base plate 92 that closes the lower surface of the column 90. In another embodiment, in order to prevent the column 90 from coming out of the sheath tube 10 and the tube 10 from coming out of the base column mold 20 when pulling stress is generated in the column 90, You may weld a deformed bar etc. to the side and the outer side suitably.

  The sheath tube 10 is made of steel for building structures, and is made of STKR400 according to JIS standards. In another embodiment, the pillar of the building is a cylinder, and the sheath tube is made of a columnar STK400 having a slightly larger diameter than the pillar of the building. The bottom surface of the sheath tube 10 is closed by welding a plate of SS400. The bending restraint fitting 12 is formed by cutting a SM490 plate. Grout 100 is a non-shrink mortar. The main beam bars 50 and 60 are obtained by processing a male thread at the tip of a normal deformed bar. Other reinforcing bars and the like are conventionally used materials. If the gap between the sheath 10 and the column 90 is too large, the grout 100 bears a bending stress. Therefore, it is preferable that the gap is 50 mm or less when both are disposed with the axes substantially in common. If it is too large, the range in which the column 90 can be positioned in the horizontal direction is also reduced, and therefore it is preferable to provide 10 mm or more as an adjustment allowance.

  Next, the operation of this embodiment will be described.

  The process is the same as that in the normal process until the discarded con 82 is hit on the ground work 84. Next, the sheath tube 10 is fixed on the discarding container 82. The sheath tube 10 is fixed by placing an anchor frame (not shown) on the con 82 and placing it on it. After fixing the sheath tube 10, the main beam bars 50 and 60 are inserted into the insertion holes 14 of the bending restraint fitting 12, and the nut 15 is screwed to stop the tip. When the arrangement of the other columnar main bars 86 and ribs 70 is completed, the opening of the sheath tube 10 is covered with a plate, a formwork is built, the foundation footing 80, the foundation column mold 20 and the foundation beam 30, 40 is placed in concrete. After backfilling in this state, the first-floor concrete of the building is constructed. As a result, a flat first floor with good workability without pillars, anchor bolts, reinforcing bars and the like protruding from the floor is completed by another method that does not use sheath pipes.

  After the foundation placing process is completed, the pillar 90 welded to the base plate 92 is carried in at the factory. It is also one of the advantages of the construction method using sheath pipes that the delivery of the pillars is not necessary at the time of foundation placement but after foundation placement. The column 90 is suspended by a crane and inserted into the sheath tube 10, but the swing prevention tool 18 can stop the swing in a short time. By adjusting the height of the level adjustment plate 19 and adjusting the horizontal position by the positioning device 171, the column core position can be accurately determined by the floor height. When the column core position is determined, the column 90 is fixed by tightening the bolt 176 of the positioning device 171. If the upper floor beams are joined in this state, the frame is assembled with high accuracy. After the assembly is completed, the grout 100 is filled between the sheath tube 10 and the column 90, and when strength is developed, the bolt 176 is loosened and the positioning device 171 is removed to complete the construction.

  According to the embedded column base sheath according to the first embodiment as described above, the beam main bars 50 and 60 are connected to the sheath tube 10 embedded in the foundation. Even if the stress is generated, the beam main bars 50 and 60 connected to the bending restraining metal fitting 12 resist the bending stress, thereby preventing the side surface of the column 90 from being pulled out. In addition, the bending restraint bracket 12 is excellent in stress transmission because the pair of beam main bars 50, 60 extending from the foundation beams 30, 40 with the sheath 10 sandwiched between them is constrained on the back outer surface. Since only the main beam bars 50 and 60 are inserted into the insertion holes 14 of the restraint fitting 12 and stopped by the nut 15, workability is also good.

[Second Embodiment]
6 and 7 show a column base portion of a building using the second embodiment of the embedded column base sheath according to the present invention. In each figure, members having the same functions as those illustrated in FIGS. 1 to 5 are denoted by the same reference numerals and detailed description thereof is omitted.

  6 and 7, a column 90 is inserted into a sheath tube 210 embedded in the basic column mold 20 with the opening on the upper surface facing upward, and the grout 100 is filled and fixed in a gap. Similar to the first embodiment, the column 90 is a prism, and the sheath 210 is also a prism having a slightly larger diameter than the column 90. The four main beam bars 250 and 260 extending horizontally from the foundation beams 30 and 40 are U-shaped in plan view, and the bottom portion of the U-shape is slightly larger than the width of the sheath 210. That is, assuming that the foundation beam 30 is the front direction, the beam main reinforcing bars 250 extend from the foundation beam 30 in the horizontal direction, and the left and right outer surfaces 262 of the sheath 210 adjacent to the outer side surface 268 nearest to the foundation beam 30. H. 264 passes through one of the two sides of H.264 and is bent at a right angle in the horizontal direction at the connecting portion between the innermost outer surface 266 farthest from the foundation beam 30 and the left and right outer surfaces 262, 264, and the outer outer surface 266 and the right and left outer surfaces bent at a right angle in the horizontal direction at the connection portion between the outer surface 266 in the back and the other of the left and right outer surfaces 262 and 264 facing either one of the left and right outer surfaces 262 and 264. It is a U-shape that passes near the other of 262 and 264 and returns to the foundation beam 30.

  The U-shaped reinforcing bar receiving socket 212 to which the U-shaped beam main bars 250 and 260 are connected is welded to the outer surface of the sheath tube 210, and the left and right outer surfaces 262 and 264 are assumed when the foundation beam 30 is in the front direction. There are four sets on both sides. Similarly, four sets of beam main bars 260 extending from the foundation beam 40 are provided on both the back and front outer surfaces 266 and 268. The U-shaped reinforcing bar receiving socket 212 has a cylindrical shape, and the main beam bars 250 and 260 can be inserted therein.

  The construction process is almost the same as that of the first embodiment, but in the reinforcement work after the sheath tube 210 is fixed, the beam main reinforcing bars 250 and 260 are inserted into the U-shaped reinforcing bar receiving sockets 212, respectively. The beam main bars 250 and 260 and the sheath tube 210 are connected.

  According to the sheath of the embedded column base according to the second embodiment as described above, bending main stresses 250 and 260 are connected to the sheath 210 embedded in the foundation and the bending stress generated in the column 90 is generated. To prevent the side surface of the pillar 90 from being pulled out. Further, the bar arrangement work is performed by simply inserting the beam main bars 250 and 260 into the U-shaped reinforcing bar receiving socket 212, and the workability is good, and the configuration is simple and can be manufactured at low cost.

[Third Embodiment]
8 and 9 show a column base portion of a building using the third embodiment of the embedded column base sheath according to the present invention. In each figure, members having the same functions as those illustrated in FIGS. 1 to 5 are denoted by the same reference numerals and detailed description thereof is omitted.

  8 and 9, a pillar 90 is inserted into a sheath 310 that is embedded in the base pillar mold 20 with the opening on the upper surface facing upward, and the grout 100 is filled and fixed in the gap. As in the first embodiment, the pillar 90 is a prism, and the sheath 310 is also a prism having a slightly larger diameter than the pillar 90. The main beam bars 350 and 360 extending from the foundation beams 30 and 40 are one set of two arranged in parallel in the horizontal direction, and four sets of eight from the foundation beams 30 and 40 extend in the vertical direction. Assuming that the foundation beam 30 is in the front direction, the set of beam main bars 350 extends near the left and right outer surfaces 362 and 364 of the sheath 310 and the tip is in a position before the outer surface 366 at the back of the sheath 310. Has reached. A male screw is machined at the distal end of the beam main bar 350 and is screwed into a female screw hole of a screw rebar receiving sheath 312 provided on both the left and right outer surfaces 362 and 364 of the sheath 312.

  In the sheath tube 310 according to the third embodiment, after fixing the sheath tube 310, the beam main bars 350 and 360 are inserted into the respective screw reinforcing bar receiving sheaths 312, and the beam reinforcing bars 350 and 360 are rotated and screwed together. Thus, the construction is performed in the same process as the first embodiment except for the bar arrangement work in which the beam main bars 350 and 360 and the sheath 310 are connected.

  According to the sheath of the embedded column base according to the third embodiment as described above, the bending stress generated in the column 90 due to the connection between the sheath tube 310 embedded in the foundation and the beam main bars 350 and 360 is obtained. It can counteract and prevent the side surface extraction of the pillar 90. FIG.

  Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and it is needless to say that modifications can be appropriately made within the scope of the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 ... Sheath pipe 12 ... Bending restraint metal 14 ... Insertion hole 15 ... Nut 20 ... Foundation column type 30, 40 ... Foundation beam 50, 60 ... Beam main reinforcement 90 ... Column 100 ... Grout

Claims (8)

In the sheath pipe for fixing the pillar to the concrete foundation by embedding the sheath pipe with the upper surface opened in the concrete foundation, inserting the pillar from the upper face of the sheath pipe and filling the gap with the grout,
The outer surface of the sheath tube is the front side facing the concrete foundation beam side and the concrete foundation beam side
And at least one connecting means to which the beam main bar extending from the concrete foundation beam is connected is provided on the outer surface.
The beam main bar extends in a horizontal direction from the concrete foundation beam, and at least the core of the sheath pipe.
Extending near both sides facing each other in two directions perpendicular to the side of the concrete foundation beam, the connecting means is
The beam main bar provided on the outer surface other than the front side facing the concrete foundation beam side of the sheath tube
Recessed column base sheath tube characterized in that is connected . An outer surface of the column that is circumferentially contacted with an interval so as to protrude in an axial direction from the inner surface of the sheath tube and that contacts the outer surface of the column when the column is inserted. The sheathed tube of the embedded column base according to claim 1, further comprising a plurality of steady rests for urging the column in a direction away from the inner surface of the sheath tube. The pillar is a prism, and the plurality of anti-rest devices are provided with four pieces.
The sheathing pipe of the embedded column base according to claim 2, which abuts on each of the two side surfaces. The plurality of anti-rest devices are each made of a steel plate bent so as to form a generally U-shaped shape, with one straight portion of the U-shaped shape facing the downward direction of the other straight portion. The sheathed tube of the embedded column base according to claim 2 or 3, wherein the sheathed tube is welded to the inner surface of the sheathed tube. The sheath tube can adjust the horizontal position of the pillar in the sheath tube,
5. The embedded column base sheath tube according to claim 1, further comprising a detachable column positioning mechanism. The sheath tube has a prismatic shape, and the beam main bar is a set of two beam main bars parallel to the concrete foundation beam in the horizontal direction, and the end of the pair of beam main bars is the most from the concrete foundation beam. Reach a position beyond the outer surface of the far back,
The connection means is provided on the outer outer surface of the sheath tube, and both ends extend beyond the left and right outer surfaces of the sheath tube, and the vicinity of the ends of the pair of beam main bars is connected near the both ends. An embedded column base sheath tube according to any one of claims 1 to 5. The sheath pipe has a prismatic shape, and the beam main bar passes near any one of the right and left outer surfaces of the sheath pipe adjacent to the outer surface nearest to the concrete foundation beam of the sheath tube. The pipe is bent at a right angle in the horizontal direction at a connection portion between the outermost outer surface farthest from the concrete foundation beam and one of the left and right outer surfaces, passes near the outer outer surface, and passes through the outer outer surface. And the other side of the left and right outer surfaces facing either one of the left and right outer surfaces, bend at a right angle in the horizontal direction and pass near the other of the left and right outer surfaces and extend to the concrete foundation beam
A beam-shaped bar
The connecting means is provided on both the left and right outer surfaces of the sheath tube, and the U-shaped beam main bars are connected by inserting portions extending near both the left and right outer surfaces of the sheath tube. The sheathed pipe of the embedded column base according to any one of claims 1 to 5. The sheath pipe has a prismatic shape, and the beam main bars are a set of two beam main bars parallel to the concrete foundation beam in the horizontal direction, and the pair of beam main bars are the outer side surfaces of the right and left sides of the sheath pipe. Close
Extending to a position where the tip of the pair of beam main bars does not reach the outermost surface farthest away from the concrete foundation beam,
It said connection means is provided on both the outer surface of the left and right of the sheath tube, according to claim 1 to 5 near the tip of said set of beam main reinforcement are respectively connected at the outer surface near the left and right of said sheath tube An embedded column base sheath according to any one of the above.