JPH07286362A - Method of connection construction of column member - Google Patents

Abstract

PURPOSE:To absorb an error, and to improve workability by interposing a frame body consisting of a hard rubber, etc., between a footing beam and a baseplate and filling an air gap in the frame body with mortar when a steel framed column, etc., are installed upright onto the footing beam. CONSTITUTION:A frame body 4 is formed of a substance, in which plastic deformation and elastic deformation difficult to be generated in concrete by the external force of a sufficiently sulfurized hard rubber, rigid plastics, the laminate of the hard rubber and a steel plate, etc., are generated. The frame body 4 is interposed between a footing beam 2 and the baseplate 1A of a steel framed column 1, etc., and an air gap 7 is filled with mortar 8 from a filler hole 9. The degree of filling at that time is confirmed by watching the discharge of mortar 8 from a discharge hole 10. The degree of filling can also be confirmed by discharge from the clamping section of a nut 5 without forming the discharge hole 10. Accordingly, the column can be erected upright efficiently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining method for joining ready-made column members such as steel frame columns and precast reinforced concrete columns vertically to column members or other structural members.

[0002]

2. Description of the Related Art When installing a steel column on a reinforced concrete foundation beam, it is common to place a mortar on the upper surface of the foundation beam and adjust the level and inclination of the steel column. In addition, when joining a new precast reinforced concrete column on top of an existing precast reinforced concrete column, after placing mortar on the concrete top surface of the existing precast reinforced concrete column, a new column main bar protruding from the top surface of the existing precast reinforced concrete column is newly installed. A general method is to insert it into a sleeve embedded in the lower end of a precast reinforced concrete column, fill the sleeve with grout material, and join the column main bars to each other.

[0003]

In any of the above-described joining of steel columns to foundation beams and joining of precast reinforced concrete columns to each other, it is indispensable to place a mortar for adjusting the level and inclination. . In order to construct this floor mortar, it is necessary to go through the steps of installation of formwork-placement of mortar-demolition and removal of formwork, which requires a great deal of time and labor.

[0004]

In order to solve the problems, the present invention replaces the above-mentioned form installation-mortar placement-disassembly / removal of formwork with laying mortar, instead of a hard rubber-like substance frame at the joint. Installation-filling the mortar inside the frame, the workability of the mortar spread to the joint is improved, and the plastic deformation of the hard rubber-like material frame is used for joining. The purpose is to relieve the stress around the area.

That is, the present invention is a pillar member joining method characterized in that a frame made of a hard rubber-like substance is interposed in the joint portion of the column members, and mortar is filled in the voids inside the frame body.
Typical joints to which the joining method of the present invention is applied are steel frame columns, reinforced concrete foundation beams and joints, and joints between precast reinforced concrete columns, but the level and inclination are adjusted by installing conventional mortar. The same applies to the joints that were used.

The hard rubber-like substance used in the present invention has a rigidity that is smaller than or equal to that of concrete and mortar, and is a substance that undergoes plastic deformation and elastic deformation that are difficult to occur in concrete and mortar due to external force. Alternatively, it includes hard plastic moldings as well as synthetic rubbers that are sufficiently sulfided. Further, a laminated body in which a hard rubber-like substance and a steel plate are laminated is also included in this hard rubber-like substance.

The point of the present invention is not only to integrate the joints of the pillar members with mortar, but also to interpose a part of the hard rubber-like material while integrating with the mortar, and also to omit the formwork work at the joints. That is the point.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings showing the embodiments of the present invention.

FIG. 1 shows a joint portion of an example in which a steel frame column is joined to a reinforced concrete foundation beam by the joining method of the present invention. (A) is a longitudinal sectional view, (b) is a plan view, and (c) is used at that time. A plan view of the hard rubber-like substance frame body, (d),
(E) is a top view of the hard rubber-like substance frame of another shape.

A procedure for joining a steel frame column to a reinforced concrete foundation beam will be described with reference to FIG.

(1) A hard rubber-like material frame 4 having a predetermined hardness and thickness is prepared, and an anchor bolt 3 projecting from a foundation beam 2 is inserted into a bolt hole 6 which is drilled to insert a hard rubber-like material frame. The body 4 is placed on the foundation beam 2.

(2) The anchor bolt 3 projecting from the foundation beam 2 is inserted into the bolt hole of the base plate 1A of the steel column 1, and the nut 5 is tightened to build the steel column 1. At this time, the level and inclination of the steel column 1 are adjusted by the tightening degree of the nuts 5 and 5.

(3) The non-shrinkable mortar 8 is injected through the mortar injection hole 9 formed in the base plate 1A, and it is confirmed that the mortar is discharged through the mortar discharge hole 10 and the inside of the hard rubber-like substance frame 4 is confirmed. Complete the filling of the mortar. Then, non-shrink mortar is filled and fixed also in the tightening portion of the anchor bolt 3 by the nut 5 by a usual method. In the figure, the method of filling the non-shrink mortar into the hard rubber-like substance frame 4 and the filling of the non-shrink mortar into the tightening portion of the nut 5 are shown independently.
If the hard rubber-like substance frame 4 is provided with a communication hole to the tightening portion, the non-shrinkable mortar 8 is injected from the mortar injection hole 9 and it is confirmed that the mortar is discharged from the tightening portion of the nut 5. Both mortars can be filled simultaneously by completing the filling of the shrink mortar. (At this time, the mortar discharge hole 10 is not provided.) The mortar injection hole 9 may be provided on the side surface of the hard rubber-like substance frame 4 instead of the base plate 1A.

(D) and (e) show a hard rubber-like substance frame 4 having a shape different from that of (c). In (d), the shape of the void 7 in the frame 4 is circular and bolt holes are formed. Having 6, (e)
Indicates that there is no bolt hole 6 and the bolt is placed outside the anchor bolt 3. When the hard rubber-like substance frame 4 having the shape of (e) is used, the void 7 in the frame 4 and the void in the tightening portion of the nut 5 communicate with each other as shown in FIG. The filling of the mortar with the mortar can be performed at the same time.

2A and 2B show an example of a joint portion in which precast reinforced concrete columns are joined to each other by the joining method of the present invention. FIG. 2A is a longitudinal sectional view, and FIG. 2B is a sectional view taken along line AA of FIG. .

The procedure for joining the precast reinforced concrete columns to each other will be described with reference to FIG.

(1) The beam 12 is installed on the top of the existing precast reinforced concrete column 11B, and the column main bar 16B of the existing precast reinforced concrete column 11B projects on the upper surface of the beam 12. A hard rubber-like substance frame 4 having a predetermined hardness and thickness is prepared and placed around the column main bar 16B.

(2) A new precast reinforced concrete column 11A is inserted while inserting the top of the column main bar 16B of the existing precast reinforced concrete column 11B into the lower end opening of the sleeve 13 buried around the column main bar 16A of the new precast reinforced concrete column 11A. Build in.

(3) The mortar 8 is injected through the mortar injection hole 14 formed in the outer side of the sleeve 13, and it is confirmed that the mortar is discharged through the mortar discharge hole 15, and the mortar is filled in the sleeve 13. To complete. At this time, by filling the mortar in the sleeve 13, the mortar is also filled in the voids in the hard rubber-like substance frame 4 communicating with the voids in the sleeve 13. After confirming that the mortar is discharged from all the mortar discharge holes 15, the filling of the mortar is completed.

[0020]

【The invention's effect】

(1) Since the hard rubber-like substance frame body interposed in the joint portion also serves as the form of the floor mortar, the workability of applying the floor mortar to the joint portion is improved.

(2) Since the large bearing stress applied to the compression side of the joint is absorbed and relaxed by the plastic deformation of the hard rubber-like material frame, the bearing failure of concrete can be delayed.

(3) It is possible to easily absorb a construction error in erection of the steel frame column by adjusting the degree of tightening the mounting bolts of the base plate of the steel frame column.

[Brief description of drawings]

FIG. 1 shows an example of a joint portion in which a steel frame column is joined to a reinforced concrete foundation beam by the joining method of the present invention, (a) is a longitudinal sectional view, (b) is a plan view, and (c) is the hard material used at that time. FIG. 3 is a plan view of a rubber-like substance frame body, and (d) and (e) are plan views of a hard rubber-like substance frame body having another shape.

FIG. 2 shows a joint portion of an example in which precast reinforced concrete columns are mutually joined by the joining method of the present invention,
(A) is a longitudinal sectional view and (b) is an AA sectional view of (a).

3A and 3B are enlarged views of a main part of a base plate mounting portion of a steel column, where FIG. 3A is a plan view and FIG. 3B is a vertical sectional view.

[Explanation of symbols]

1 ... Steel column, 1A ... Base plate, 2 ... Foundation beam, 3 ... Anchor bolt, 4 ... Hard rubber-like material frame, 5 ... Nut, 6 ... Bolt hole, 7 ... Void, 8・
・ Mortar, 9 ・ ・ Mortar injection hole, 10 ・ ・ Mortar discharge hole, 11A ・ ・ New precast reinforced concrete column, 11B ・ ・ Existing precast reinforced concrete column,
12 ・ ・ Beam or floor, 13 ・ ・ Sleeve, 14 ・ ・ Mortar injection hole, 15 ・ ・ Mortar discharge hole, 16A ・ ・ Column main bar of new precast reinforced concrete column, 16B ・ ・
Column main bar of existing precast reinforced concrete columns.

Claims (3)

[Claims] 1. A method for joining pillar members, characterized in that a frame body made of a hard rubber-like material is interposed at a joint portion of the pillar members, and mortar is filled in the voids inside the frame body. 2. The pillar member joining method according to claim 1, wherein the pillar member is a steel frame pillar, and the steel frame pillar is joined to a reinforced concrete foundation beam. 3. The method for joining pillar members according to claim 1, wherein the pillar members are precast reinforced concrete pillars, and the precast reinforced concrete pillars are joined to each other.