JP3114344U - Standing structure of pillar - Google Patents

Abstract

Provided is a column erecting structure capable of maintaining the stability of a foundation and a structure even when the column erects at a position shifted from the center position of the upper surface of the foundation.
In a standing structure of a pillar 5 for standing a pillar 5 with respect to a foundation 2, a flat base plate 3 provided on the center of gravity of the foundation 2 or on the central axis, and the base plate 3 A horizontal beam 4 provided in the horizontal direction on the top and a column 5 erected so as to stand on the upper surface of the horizontal beam 4 are provided. Then, the base plate 3 is fixed to the foundation 2 with anchor bolts 3a, and the horizontal beam 4 is welded to the fixed base plate 3 for attachment.
[Selection] Figure 1

Description

  The present invention relates to a standing structure of a pillar, and more particularly to a structure for attaching a steel pillar to a foundation formed of concrete or the like.

A conventional column standing structure is shown in FIG. In FIG. 5, 2 is a foundation and 5 is a pillar. In general, when a column is attached to a foundation, a ground to be a construction site is reinforced with concrete or the like as necessary, and a reinforced concrete foundation is provided on the reinforced ground. Then, columns are erected on the upper surface of the concrete foundation, and the periphery thereof is fixed with anchor bolts, and then a building structure is constructed by spanning beams between the columns.
JP 2004-316175 A

  By the way, in general, when a column is erected on the foundation, conventionally, the column is often erected at the center portion of the upper surface of the foundation. That is, if the standing position of the column deviates from the center of the upper surface of the foundation, an eccentric load is generated on the foundation due to the load applied from the column, and the foundation becomes unstable. In addition, when a large load is applied to the end portion of the concrete foundation, there is a possibility that a crack or the like may occur in the concrete, and the structure provided on the upper portion may become unstable. For this reason, conventionally, a column is erected at the center of the upper surface of the foundation as much as possible.

  However, in reality, there are cases where the pillar cannot be erected at the center position of the upper surface of the foundation due to restrictions due to narrow spaces and the presence of obstacles. There has been a problem that the structure becomes unstable.

  Therefore, the present invention has been made paying attention to the above problems, and even when a column is erected at a position shifted from the center position of the upper surface of the foundation, the stability of the foundation and the structure can be maintained. The purpose is to provide an upright structure for pillars.

  That is, in order to solve the above-mentioned problems, the present invention provides a columnar base structure for erecting a column with respect to the foundation, a flat base plate provided at the center of the upper surface of the foundation, and on the base plate. A horizontal beam provided in the horizontal direction and a column erected so as to stand on the upper surface of the horizontal beam are provided.

  With such a structure, even if the column is erected at a position displaced from the center part of the upper surface of the foundation, the load is transmitted to the base plate at the center part of the upper surface of the foundation through the horizontal beam, so that the center of the foundation is always maintained. A load can be applied to the portion. As a result, no eccentric load is generated on the foundation, and the foundation and the structure can be stabilized.

  Preferably, the base plate is fixed to the foundation with a fixing member, and a horizontal beam is attached to the fixed base plate.

  If the base plate is fixed in this manner, the base plate will not be displaced from the central portion of the upper surface of the foundation, so that the column load can always be applied to the central portion of the foundation.

  Further, the horizontal beam is fixed to the base plate by welding.

  In this way, since the horizontal beam is indirectly fixed to the foundation via the base plate, the horizontal beam is not displaced, and the column can be erected stably.

  In addition, such a horizontal beam is provided so as to straddle on a foundation provided separately.

  In this way, even if the foundation does not exist at the standing position of the pillar, the pillar can be erected on the horizontal beam, and the foundation provided by separating the load on the pillar. It becomes possible to make it act on the center of gravity axis.

  According to the present invention, in a column standing structure for standing a column with respect to a foundation, a flat plate-like base plate provided in a central portion of the upper surface of the foundation and a horizontal plate provided on the base plate in a horizontal direction. Since the beam and the column attached so as to stand upright on the upper surface of the horizontal beam are provided, even if the column is erected at a position shifted from the central portion of the upper surface of the foundation, By transmitting the load to the base plate at the center portion of the upper surface of the foundation, the load can always be applied to the center portion of the foundation. As a result, even when the column is displaced from the center position due to the presence of an obstacle, an eccentric load is not generated on the foundation, and the foundation and the structure can be stabilized.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a standing structure 1 of a pillar 5 in the present embodiment. A horizontal beam 4 is bridged over a foundation 2 existing at a separated position, and the pillar 5 is placed on the upper part of the horizontal beam 4. FIG. 2 shows a standing state diagram. 2 is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 3 is a cross-sectional view taken along the line BB in FIG.

  In FIG. 1, 2 is a foundation provided on the ground. The foundation 2 is formed of reinforced concrete or the like, and is formed at the standing position of the column 5. When this foundation 2 is provided, it is necessary to prevent ground subsidence of a structure such as a building. Therefore, first, the ground is reinforced as necessary, and the column 5 on the reinforced ground is placed at the standing position. Provided. As this ground reinforcement method, there are (a) surface layer ground improvement method, (b) column five-shape improvement method (soil column method), and (c) small-diameter steel pipe pile method. And after reinforce | strengthening the ground by such a reinforcement method, the ground in a design area | region is excavated, a reinforcing bar is integrated in the excavated area | region, and concrete is poured. At this time, the foundation 2 forms a wall surface with a backing plate or the like, and forms an upright portion by pouring concrete between the wall surfaces. Then, the entire foundation 2 is buried in the ground.

  Reference numeral 3 denotes a base plate fixed to the upper surface 2 a of the foundation 2. The base plate 3 is formed of a metal plate having a thickness of 2 cm to 3 cm and a length and width of about 40 cm which is larger than the width of the horizontal beam 4 described later. The base plate 3 configured as described above has a short center when the center position of the base plate 3 is substantially above the center of gravity of the base 2 by the anchor bolt 3a on the upper surface 2a of the base 2 or when the base 2 is vertically long. Fixed on the central axis of direction. The anchor bolt 3a is attached to an appropriate position of the square base plate 3 so that it does not get in the way when the horizontal beam 4 is attached, and the horizontal beam 4 is attached therebetween. In this way, even if the horizontal beam 4 is displaced in the left-right direction due to an earthquake or the like, the displacement can be regulated by the head from which the anchor bolt 3a protrudes.

  Reference numeral 4 denotes a horizontal beam, which is provided so as to pass over the center point of the base plate 3. The horizontal beam 4 is made of H steel having an H-shaped cross section, and one side surface thereof is positioned on the base plate 3 side (referred to as a lower side surface 4b) and the other side surface is positioned upward (upper side surface 4a). And). The end of the lower side surface 4b on the base plate 3 side is fixed to the base plate 3 by welding or the like so that the relative position with respect to the base plate 3 does not shift. When the horizontal beam 4 is attached to the base plate 3, first, the base plate 3 is fixed to the upper surface 2 a of the foundation 2 that is provided separately, and is attached across the base plate 3. In addition, since this horizontal beam 4 may produce a big bending by the big load from the pillar 5 if the dimension of a longitudinal direction is too large, it is preferable to make it the length of about 100 cm-120 cm, for example. . However, since this length depends on the rigidity of the H steel, it can be further increased when the rigidity is high. Reference numeral 40 denotes a reinforcing plate that is attached to a column attachment portion of the horizontal beam 4 and prevents H steel from being deformed by a load from the column 5.

  Reference numeral 5 denotes a column which is erected on the upper surface portion of the horizontal beam 4. This column 5 is also made of H steel or the like, and its lower end portion is directly attached by arc welding or the like. Further, the column 5 is fixed to the horizontal beam 4 using another reinforcing metal fitting or the like if the welded portion needs to be reinforced. In general, the mounting position of the pillar 5 is preferably set on the center of gravity of the foundation 2 or on the central axis in the width direction when the foundation 2 is provided in a vertically long shape. In some cases, it must be attached at a position shifted from the center position due to the presence of obstacles. In such a case, it is attached at an appropriate position along the upper side surface 4a of the horizontal beam 4. In addition, when the attachment position of the pillar 5 is about 30 cm to 40 cm away from the base plate 3, there is a possibility that the horizontal beam 4 may be bent, but the pillar 5 is erected on the opposite side of the horizontal beam 4. In addition, since the horizontal beam 4 is fixed to the foundation 2 by the base plate 3, the deflection can be suppressed to about several mm.

  And the lower end part of the horizontal beam 4 attached to the foundation 2 and the pillar 5 in this way is backfilled by excavated earth and sand, and the horizontal beam 4 functions as an underground beam.

  The operation of the standing structure of the column 5 configured as described above will be described. When a large load is applied downward from the column 5, a moment acts on the horizontal beam 4 with the central portion of the base plate 3 as a fulcrum. However, since the column 5 is similarly erected on the other end side of the horizontal beam 4, the horizontal beam 4 can transmit the load to the base plate 3 without rotating. At this time, the horizontal beam 4 is bent due to the load from the column 5, but the horizontal beam 4 is welded to the base plate 3, and the base plate 3 is also fixed to the foundation 2 by the anchor bolt 3a. Therefore, the fulcrum can be regarded as a fixed end. Thereby, the amount of bending can be reduced by a short distance from the fixed end to the load application point.

  As described above, according to the present embodiment, in the standing structure of the pillar 5 for standing the pillar 5 with respect to the foundation 2, a flat plate provided on the center of gravity of the foundation 2 or on the central axis. Since the base plate 3, the horizontal beam 4 provided in the horizontal direction on the base plate 3, and the column 5 standing upright on the upper surface of the horizontal beam 4 are provided, Even if the column 5 is erected at a position shifted from the central portion, the load can always be applied to the central portion of the foundation 2 by transmitting the load to the base plate 3 via the horizontal beam 4. . Thereby, even if the column 5 is attached at a position shifted from the center portion of the upper surface 2a of the foundation 2, no eccentric load is generated on the foundation 2, and the foundation 2 and the structure can be stabilized.

  In addition, since the base plate 3 is fixed to the base 2 with anchor bolts 3a and the horizontal beam 4 is attached to the fixed base plate 3, the base plate 3 is not displaced from the center portion of the upper surface 2a of the base 2, and always The load of the column 5 can be applied to the center portion of the foundation 2.

  Further, since the horizontal beam 4 is welded and fixed to the base plate 3, the horizontal beam 4 can be indirectly fixed to the base 2 via the base plate 3, and the horizontal beam 4 is prevented from being displaced. Thus, the column 5 can be stably erected.

  In addition, since such horizontal beams are provided across the foundations that are spaced apart from each other, even if there is no foundation directly under the standing position of the pillar, it is bridged horizontally. Columns can be erected on horizontal beams. In addition, the column load can be applied to the center of gravity axis of the foundation.

  In addition, this invention is not limited to the said embodiment, It can implement in a various aspect.

  For example, in the said embodiment, although H steel is used as the horizontal beam 4, it is not restricted to the steel material which makes a cross-section H shape, You may make it use the steel material which has another cross-sectional shape. The horizontal beam 4 is not limited to a steel material, and may be a steel material filled with concrete in order to increase rigidity.

  In the above-described embodiment, a metal plate larger than the horizontal beam 4 is used as the base plate 3, but various types of base plates 3 are used without being limited to such sizes and shapes. It may be.

  Furthermore, in the said embodiment, although the horizontal beam 4 is embed | buried under the ground and used as an underground beam, it is naturally possible to use as a beam provided not only in this but on the ground.

The figure which shows the standing installation structure of the pillar which shows one embodiment of this invention AA sectional view in FIG. BB sectional view in FIG. The figure explaining the effect | action of the load in the form A diagram showing the load action state of a conventional column and foundation

Explanation of symbols

2 ... Foundation 2a ... Top surface 3 ... Base plate 3a ... Anchor bolt 4 ... Horizontal beam 4a ... Upper side surface 4b ... Lower side surface 5 ... Column 40 ... Reinforcement plate

Claims (5)

In the standing structure of the pillar for standing the pillar against the foundation,
A flat base plate provided at the center of the upper surface of the foundation, a horizontal beam provided horizontally on the base plate, and a column provided so as to stand on the upper surface of the horizontal beam. Standing structure of pillars characterized by In the standing structure of the pillar for standing the pillar against the foundation,
A metal plate-like base plate provided at the center of the upper surface of the foundation, a fixing member for fixing the base plate to the foundation, a horizontal beam provided in a horizontal direction at a position avoiding the fixing member of the base plate, and the horizontal A pillar standing structure characterized by comprising a pillar provided to stand on the upper surface of the beam. In the standing structure of the pillar for standing the pillar against the foundation,
A metal plate-like base plate provided at the center of the upper surface of the foundation, an anchor member for fixing the base plate to the foundation, a horizontal horizontal beam welded at a position avoiding the anchor member of the base plate, and the horizontal plate A pillar standing structure characterized by comprising a pillar provided to stand on the upper surface of the beam.   The column installation structure according to any one of claims 1 to 3, wherein the column is attached at a position shifted from a central portion of the upper surface of the foundation. The pillar standing structure according to any one of claims 1 to 4, wherein the horizontal beam is provided on a foundation provided at a distance.

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