JPH0742164A - Pillar erection execution method and pillar bottom support device - Google Patents

Abstract

PURPOSE:To firmly and accurately erect a pillar on foundation concrete and reduce the quantity of mortar to be used. CONSTITUTION:A bottomed vertical cylinder 2 is integrally suspended at the center of the lower face of a metal plate 1, a tubular cover member 6 is fitted on its upper face, and a pillar bottom support device A screwed with a bolt body 4 into the bottomed vertical cylinder 2 through the tubular cover member 6 is buried in foundation concrete 7 to the upper end section of the tubular cover member 6. The protruded length of a bolt head section 4a from the tubular cover member 6 is adjusted to set the height position of a pillar B, the base 9 of the pillar B is received on the head section of the bolt body 4a, and the pillar B is firmly supported. The verticality of the pillar B is adjusted centering on the bolt body 4, then the pillar B is fixed to the foundation concrete 7 with anchor bolts 8. Grout mortar 12 is placed into the interval section between the foundation concrete 7 face and the base 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a building column for accurately constructing a steel column on a foundation concrete when constructing a multi-story steel frame building, and a column bottom support device for use in the method. It is a thing.

[0002]

2. Description of the Related Art Conventionally, when constructing a building such as a high-rise building or a steel-framed house, when columns are to be built at a predetermined interval, after the foundation concrete 26 is placed as shown in FIG. The bottom half of the centered reinforcing bar 24 is vertically inserted into the position of the building column and fixed integrally by hardening the basic concrete 26, and then the reinforcing bar length portion corresponding to the column bottom height position from the basic concrete surface is fixed. After adjusting the level by cutting the upper end of the rebar 24 while leaving it, FIG.
As shown in FIG. 5, the cement is kneaded to form a mountain-shaped cement heap 25 centered on the reinforcing bar, and after the cement heap 25 is hardened, the lower end base 28 of the pillar B is received on the cement heap 25. The base 28 is fixed to the foundation concrete 26 by the anchor bolts 27 while adjusting the verticality of B.

[0003]

However, according to the method of constructing a building column as described above, not only the case where the work of cutting the reinforcing bar for adjusting the level of the column B to be built cannot be performed accurately, but also the cement is produced. After washing the basic concrete surface before performing the heap 25 and performing the cement heap 25,
Since the period until hardening and the strength test etc. of the cement pile 25 are required, the work becomes extremely complicated and requires skill in each work, and further it takes a long time to perform the building pillar. There is a problem that the efficiency decreases.

Further, in the case of a high-rise building, since a long column having a large weight is to be built, the cement pile 25 is crushed by its weight, and the reinforcing bar 24 is bent, so that the building column can not be constructed according to the level adjustment. , Therefore the foundation concrete
There is a problem in that it is necessary to perform the level adjustment again by interposing a plurality of iron plates between the base 26 of 26 and the pillar B, and it takes more time for the construction pillar work. Further, after the building pillar, grout mortar is placed between the foundation concrete surface and the base 28,
Since the projecting length of the reinforcing bar 24 from the basic concrete surface is long, there is a problem that the layer thickness of expensive grout mortar becomes large and the construction cost becomes high. It is an object of the present invention to provide a method for constructing a building column and a column bottom supporting device for the method, which can completely eliminate such problems.

[0005]

In order to achieve the above object, in the method for constructing a building pillar according to the present invention, first, a metal plate having an appropriate size is formed in the central portion of the lower surface with the upper end opened to the upper surface of the metal plate. A bottom vertical cylinder is integrally hung, a bolt is screwed into the bottom vertical cylinder, and a bolt head protruding from the bottom vertical cylinder is surrounded by the metal plate. A column bottom support device provided with a cover member is positioned at the center of a building column position of the foundation concrete with its bottomed vertical cylinder body, and a metal plate is immersed in the foundation concrete to an appropriate height portion of the cylindrical cover member. It is buried in the state that the foundation concrete surface has reached. Then, the height of the bolt head of the bolt body is projected upward from the tubular cover member and adjusted to the level of the building column, and then the center of the lower surface of the base fixed to the lower end of the column is supported by the bolt head. The base is fixed to the foundation concrete via anchor bolts, and then mortar is placed between the foundation concrete and the base.

Further, the pillar bottom supporting device used for carrying out the method for constructing a building pillar is such that the upper end of the bottomed vertical cylinder is integrally fixed to the central portion of the metal plate and the upper end opening of the bottomed vertical cylinder is formed. Section is opened on the upper surface side of the metal plate, and the bolt body for receiving the base of the column is screwed into the screw portion provided in the opening portion so as to be able to advance and retreat, and the lock nut is screwed into the bolt body. It has a structure in which a tubular cover member having an appropriate height surrounding the bolt body is provided on the top.

[0007]

[Operation] Since the column bottom support device is embedded in the position of the building column of the cast concrete foundation so that the foundation concrete surface reaches the appropriate height of the tubular cover member, the foundation concrete is hardened. The bottomed vertical cylinder of the column bottom support device and the metal plate are embedded in the foundation concrete so that the column bottom support device is accurately and firmly fixed in place. Also,
Since the bolt head projecting upward from the metal plate is surrounded by the tubular cover member, it is not embedded in concrete.

After the hardening of the basic concrete, the bolt body screwed into the opening of the vertical cylindrical body with a bottom embedded in the basic concrete is projected upward from the upper end of the opening of the cylindrical cover member to adjust the level. , The height position of the bottom surface of the column received by the head of the bolt body from the basic concrete surface is set. Next, with the pillar in a vertical state, place the center of the base, which is fixed to the lower end of the pillar, on the bolt head, and bury it in the foundation concrete, and through the fixed metal plate and bottomed vertical cylinder to the foundation concrete. Support the load.
Then, while adjusting the verticality of the pillar, fix the outer peripheral part of the base to the concrete foundation with anchor bolts. After this building work, mortar is cast in the space between the base concrete surface and the base to embed the tubular cover member and the bolt body, and the base is supported by the base concrete through the mortar layer.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to the drawings. A pillar bottom supporting device A is a rectangular metal flat plate (10 cm) having a thickness of several mm.
A through hole 1a is formed by penetrating the center of a horizontal metal plate 1 made of (10 cm), and the length is 75c by communicating with the lower end of this through hole 1a.
The upper end opening of the metal bottomed vertical cylindrical body 2 having an outer diameter of about 25 mm and an outer diameter of about 25 mm is integrally fixed to the center of the lower surface of the horizontal metal plate 1 by welding or the like, and is attached to the upper surface side of the metal plate 1 through the through hole 1a. A female screw portion 3 is provided in the exposed opening of the bottomed vertical cylindrical body 2, and a bolt body 4 is screwed into the female screw portion 3 to store the lower portion in the bottomed vertical cylindrical body 2. Further, a lock nut 5 is screwed onto the bolt body 4.

The female screw portion 3 provided in the upper end opening of the bottomed vertical cylinder 2 has a structure in which it is engraved on the inner peripheral surface of the top end of the bottomed vertical cylinder 2 in the figure. Board 1
It may be formed by fixing a nut body on the upper surface of the metal so as to be concentric with the through hole 1a, or a structure in which the nut body is fixed in the opening of the bottomed vertical cylindrical body 2 recessed from the upper surface of the metal plate 1. You may leave it. The shape of the metal plate 1 is not limited to the rectangular shape as described above, and may be a circular shape or any other suitable shape. Further, the size of the metal plate 1 or the bottomed vertical cylindrical body 2, The bolt diameter and the like are appropriately set according to the weight of the pillar B to be built. In addition, it is preferable that the bottom portion of the bottomed vertical cylindrical body 2 is formed in a tapered shape so that an operation of immersing into the basic concrete 7 described later can be performed accurately and easily.

Reference numeral 6 denotes a cylindrical cover member disposed on the upper surface of the metal plate 1 so as to surround the bolt body 4 with the bolt body 4 at the center, and the height of the cylindrical cover member is the head of the bolt body 4. Department
It has a size slightly larger than the sum of the thicknesses of 4a and the lock nut 5, and the upper surface of the bolt head 4a has a cylindrical cover member when the bolt body 4 is completely screwed into the female screw portion 3. It is formed at a height lower than the upper end opening of 6.

A bottom plate 6a having a hole 6b having a diameter larger than that of the bolt head 4a is integrally provided at the lower end of the cylindrical cover member 6, and the lower surface of the bottom plate 6a is made of metal plate 1. It is detachably mounted on the upper surface or integrally fixed by welding or the like. In this case, the lower end edge of the tubular cover member 6 may be integrally fixed on the metal plate 1 without providing the bottom plate 6a. Although the cylindrical cover member 6 is formed in a bowl shape that widens from the lower end toward the upper end opening, the upper and lower outer peripheral diameters may be formed to have the same diameter.

A method of constructing a building column by using the column bottom supporting apparatus A having the above-described structure will be explained. First, as shown in FIG. The cylindrical body 2 is vertically immersed and the metal plate 1 is horizontally embedded, and the pillar bottom support device A is embedded to a depth where the upper surface of the basic concrete 7 reaches the upper end of the cylindrical cover member 6. At this time, the cylindrical cover member 6 is pressed downward to immerse the pillar bottom support device A, and the cylindrical cover member 6 prevents the concrete 7 from flowing into the inside.

Further, the lower half of the anchor bolt 8 is embedded in a plurality of locations on the outer periphery of the metal plate 1 around the bottomed vertical cylindrical body 2, and the basic concrete 7 is hardened in this state to make the basic concrete 7 The column bottom support device A and the anchor bolt 8 are firmly fixed to the. The plurality of anchor bolts 8 correspond to the respective mounting holes 10 at the same intervals as the plurality of mounting holes 10 formed in the outer peripheral portion of the base 9 fixed to the lower end of the pillar B to be built. Buried.

After the foundation concrete 7 is hardened, the bolt body 4 in the tubular cover member 6 is rotated to project its head 4a upward from the tubular cover member 6, and the level is adjusted to adjust the level of the bolt body 4. The height position of the bottom surface of the pillar received by the head portion 4a from the surface 7 of the basic concrete is set, and then the lock nut 5 is crimped onto the metal plate 1 to lock the bolt body 4.

Next, as shown in FIG. 4, the steel column B is suspended vertically and the mounting holes 10 formed in the outer peripheral portion of the base 9 fixed to the lower end thereof are inserted into the corresponding anchor bolts 8 as shown in FIG. The central portion of the base 9 is the head of the bolt body 4.
The pillar B is placed on the base 4a, and the weight of the pillar B hanging on the bolt 4 is supported by the foundation concrete 7 through the metal plate 1 and the bottomed vertical cylinder 2. Then, the verticality of the pillar B is adjusted with the bolt head 4a as the center, and the nuts 11 are screwed into the anchor bolts 8 and tightened on the base 9 to complete the construction pillar work.

After this construction work, as shown in FIG. 1, a non-shrinkable grout mortar 12 is cast in the space between the base concrete 7 and the base 9 to attach the cylindrical cover member 6 and the bolt body 4. It is embedded and the steel frame column B is firmly supported by the concrete foundation 7 through the mortar layer 12.

[0018]

As described above, according to the present invention, the bottomed vertical cylindrical body having the upper end opened to the upper surface of the metal plate is integrally hung at the central portion of the lower surface of the metal plate, and this bottomed vertical cylindrical body is provided. A pillar bottom support device provided with a cylindrical cover member of appropriate height surrounding the bolt head projecting from the bottomed vertical cylinder on the metal plate while screwing the bolt body, Since the vertical cylinder with a bottom is located at the center and the metal plate is immersed in the basic concrete to bury it in a state where the basic concrete surface reaches the appropriate height portion of the tubular cover member,
It can be firmly fixed to the correct building position,
By projecting the bolt body upward from the upper end of the opening of the tubular cover member and adjusting the projecting length thereof, the level of the pillar to be built can be adjusted easily and accurately.

Further, after this level adjustment, the building pillar work can be performed immediately, and by supporting the central portion of the lower surface of the base fixed to the lower end of the pillar to the bolt head,
It can be easily installed in the correct position and the weight of the column can be firmly supported on the foundation concrete through the bolt body. Moreover, the verticality of the column can be adjusted with the head of the bolt body as a fulcrum. It can be easily and accurately set, and the work efficiency can be improved to shorten the construction period.

Further, since the bolt body is provided at a position surrounded by the tubular cover member and depressed downward from the foundation concrete surface, the projecting length from the foundation concrete surface is shortened, so that the foundation concrete and the lower end of the pillar are The space between the base and the base can be set to a small size, and the amount of expensive mortar to be placed in the space used can be reduced to reduce the construction cost.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing a state of a building pillar,

FIG. 2 is a perspective view of a column bottom support device,

FIG. 3 is a simplified front view showing a state in which a column bottom support device is embedded in basic concrete,

FIG. 4 is a front view showing a state in which a lower end base of a pillar is placed on a bolt head,

FIG. 5 is a front view for explaining a conventional building pillar method,

FIG. 6 is a simplified front view showing the state of the building pillar.

[Explanation of symbols]

 1 Metal Plate 2 Bottomed Vertical Cylindrical Body 3 Female Screw Part 4 Bolt Body 5 Lock Nut 6 Cylindrical Cover Member 7 Foundation Concrete 8 Anchor Bolt 9 Base A Pillar Bottom Support Device B Pillar

Claims (2)

[Claims] 1. A bottomed vertical cylindrical body having an upper end opening on the upper surface of the metal plate is integrally hung at the center of the lower surface of a metal plate having an appropriate size, and a bolt body is screwed into the bottomed vertical cylindrical body. A pillar bottom support device provided with a cylindrical cover member of appropriate height surrounding the bolt head projecting from the bottomed vertical cylindrical body on the metal plate is provided at the center of the building column position of the foundation concrete. Position the vertical cylinder and immerse the metal plate in the basic concrete so that the base concrete surface reaches the appropriate height of the cylindrical cover member, and in this state, the height of the bolt head of the bolt body After projecting upward from the cylindrical cover member and adjusting to the level of the building column, the central part of the lower surface of the base fixed to the lower end of the column is supported by the bolt head, and the base is reinforced by anchor bolts After fixing to A method for constructing a building column, which comprises placing mortar between the foundation concrete and the base. 2. An upper end of a bottomed vertical cylindrical body is integrally fixed to a central portion of the metal plate, and an upper end opening of the bottomed vertical cylindrical body is opened on the upper surface side of the metal plate and is provided in the opening. A cylindrical cover member of an appropriate height in which a pillar base receiving bolt body is screwed into the screw portion so as to be able to move forward and backward, a lock nut is screwed into the bolt body, and the bolt body is surrounded on a metal plate. A column bottom support device characterized by being provided.