JP2001311219A - Grout form for steel-constructed stud and method of executing steel-constructed stud - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce mandays on an execution site, and to properly install grout forms at every stud without generating trouble such as a space for operation even at a time when a plurality of the studs are placed on one pilaster section or even in a unit type building assembled on a factory or the like. SOLUTION: The grout forms 30 are formed previously, and the grout forms 30 are set temporarily to a base plate 13 previously in a manufacturing plant or the like before the steel-constructed stud is mounted on foundation-structure section concrete. The upper opening of the bulging-shaped section 31 of the grout forms 30 is used as an opening for filling a grout material.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grout form and a method for constructing a steel column base used for constructing a steel column base of a building, particularly a unit type building.

[0002]

2. Description of the Related Art As a method of fixing a building to a foundation structure, a metal base plate attached by welding or the like to the lower end of a lowermost steel frame column is mounted on a concrete (column type) of the foundation structure. In general, the base plate is fastened by anchor bolts embedded in the concrete of the foundation structure.

[0003] At that time, in order to uniformly contact the lower surface of the base plate with the upper surface of the columnar portion of the concrete of the foundation structure, after the base plate is tightened by the anchor bolts,
In order to fill the gap partially formed between the lower surface of the base plate and the upper surface of the columnar portion, a method of filling the grout material between the lower surface of the base plate and the upper surface of the columnar portion so as to bring the whole surface into close contact is often used. ing.

[0004] In order to prevent the grout material from flowing out during filling of the grout material and until curing, a grout mold (grout mold) is used. Conventionally, grout formwork is mainly used after fastening the base plate to the foundation structure with anchor bolts, and then using several wooden plates, outside the base plate, so that the inner method is larger than the base plate shape. And assembled with nails.

Further, the grout mold is often sealed with a mortar or the like so that the grout material does not leak out of the gap between the lower edge of the mold and the upper surface of the column-shaped portion. Can withstand the pressure during grout filling,
The grout formwork may be reinforced with reinforcement. The filling of the grout material is performed by a casting method from a gap between the base plate and the grout formwork.

[0006]

Conventionally, a grout formwork is assembled at a construction site so as to surround a base plate by using a wooden board or the like, so that the number of man-hours at the construction site increases and the number of construction days increases. . In particular, when a plurality of pillars are mounted on one pillar-shaped part, if individual grout formwork is created for each pillar-base, the grout formwork for each pillar-base is close to each other, so that the work of creating each other's formwork is Is hindered by space,
It takes time and effort.

When a plurality of pillars are mounted on one pillar-shaped portion, it is conceivable to create a grout formwork that surrounds each pillar of the plurality of pillars collectively. In this case, the grout formwork is considered. And the grout form is inevitably large, and it becomes necessary to reinforce the grout form. Further, since a plurality of base plates are scattered inside the grout formwork, it becomes difficult to fill the grout material without a gap between the lower surface of the base plate and the upper surface of the column-shaped portion concrete. In addition, in the case where holes such as equipment piping are provided between the columns, a grout formwork that encloses each column base of a plurality of columns at a time cannot be applied,
Even if it can be applied, curing and the like are required, and the amount of work increases.

In a case where a unit-type building is assembled in a factory or the like and an outer wall or the like is already present around the pillar, or when a plurality of buildings share one pillar, After assembling the building, there is no space for work for mounting the form material on the outer wall side, and there is no space for mounting the form material, and the grout formwork cannot be installed.

The present invention has been made to solve the above problems, and can reduce the number of man-hours at a construction site.
Even when multiple pillars are mounted on one pillar section, or in a unit type building that is assembled in a factory or the like, grout formwork for each pillar must be installed without causing problems such as working space. An object of the present invention is to provide a grout formwork of a steel frame column base that can be appropriately performed, and a method of constructing a steel frame column base using the grout formwork.

[0010]

In order to achieve the above object, a grout formwork of a steel column base according to the present invention is provided with a gap between a base plate of the steel column base and concrete of a foundation structure. It is a mold for grout material to be filled, with an inner shape almost the same as the outer shape of the base plate,
It is formed in advance in a frame shape having substantially the same internal dimensions as the outer dimensions of the base plate, and a swelling shape portion swelling outward from the frame is formed in a part thereof, and the upper opening of the swelling shape portion is in contact with the outer edge of the base plate. A filling port for filling the grout material is formed therebetween.

According to this configuration, since the grout form is formed in advance, the grout form is temporarily fixed to the base plate in a production factory or the like before the steel column is installed on the concrete of the foundation structure. Can be
The work of assembling the grout formwork at the construction site becomes unnecessary.
The grout formwork of the steel frame column base according to the second aspect of the present invention further has a plurality of protrusions protruding inward of the frame and abutting against the outer end surface of the base plate.

According to this configuration, the position of the grout formwork with respect to the base plate is determined exactly, and the grout formwork does not shift with respect to the base plate. Further, a small gap is formed between the grout formwork and the base plate over the entire circumference of the base plate, and serves as an air vent passage when the grout material is filled. Furthermore, if the distance between the tips of the protrusions on the opposing surfaces of the grout formwork is smaller than the outer dimensions of the base plate, and the grout formwork is shifted toward the upper surface of the base plate, the protrusions may be applied to the upper surface of the base plate. The grout formwork can be prevented from dropping from the base plate during construction or transportation.

The grout formwork of the steel column base according to the third aspect of the present invention is further provided with a sealing member made of an elastic material at a lower edge portion facing the upper surface of the concrete of the foundation structure. According to this configuration, the seal member seals between the lower edge of the grout formwork and the upper surface of the concrete of the foundation structure, thereby preventing the grout material from leaking.

According to a fourth aspect of the present invention, there is provided a grout formwork for a steel column base, wherein the formwork is further straddled over an upper edge of the formwork in order to press the formwork against the upper surface of the concrete of the foundation structure. And a form holding metal fitting which is detachably fixed to the base plate. According to this configuration, the formwork is pressed against the upper surface of the foundation structure portion concrete by the formholder metal fitting.

According to a fifth aspect of the present invention, there is provided a method for constructing a steel column base, wherein the base plate of the steel column base is installed on the concrete of the foundation structure. The grout formwork according to any one of claims 1 to 4 is temporarily mounted on a base plate, and the base plate on which the steel frame columns are mounted is installed together with the grout formwork on the concrete of the foundation structure portion to form a steel frame column base. After the installation, the grout formwork is pressed against the upper surface of the concrete of the foundation structure after the completion of the installation, and the grout material is poured and filled from a filling port defined between the bulging shape portion of the formwork and the outer edge of the base plate.

According to this configuration, before the grout form is formed in advance and the steel column base is installed on the concrete of the foundation structure, the grout form is temporarily set on the base plate in a production factory or the like. And the work of assembling the grout formwork at the construction site becomes unnecessary.

According to a sixth aspect of the present invention, there is provided a method for constructing a steel-framed column base, wherein a grout rod for injecting grout having a pouring port having the same shape as the filling port is set in the filling port, and the grout rod is used. The grout material is poured and filled. According to this configuration, the grout material is poured and filled using the grout rod, and the backflow leakage of the grout material from the filling port is greatly reduced.

[0018]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows a building unit having a steel structure to which a grouting form of a steel column base and a method of constructing a steel column base according to the present invention are applied.

The building unit 10 has a box-shaped structure, and includes four columns (steel frame columns) 1 made of square steel pipes.
1 and four upper beams 12 passed between the upper portions of the columns 11. A base plate 13 is fixed to the lower end of each column 11 by welding or the like. A reinforcing rib plate 14 is attached to the base plate 13, and
A through hole 15 (see FIG. 4) for the anchor bolt 21 is provided.

The base plate 13 is placed together with the column 11 on the columnar portion 20 of the concrete of the foundation structure portion, the anchor bolt 21 of the columnar portion 20 is passed through the through hole 15, and the nut 22 is connected to the anchor bolt 21. By fastening, it is tightly fixed on the columnar part 20. Next, one embodiment of a grout formwork of a steel frame column base according to the present invention and a construction method of the steel frame column base will be described with reference to FIGS.

The grout form 30 is connected to the base plate 13.
The inner shape of the base plate 13 is substantially the same as the outer shape of the base plate 13.
Is formed in advance in a frame shape having substantially the same inner dimension as the outer dimension of the frame. In this embodiment, since the outer shape (planar shape) of the base plate 13 is square,
The grout formwork 30 is formed in a square tubular frame shape. The grout formwork 30 has a bulge-shaped portion 31 bulging outward from the frame at a part, and is temporarily fixed to the base plate 13 so as to surround the base plate 13. Base plate 13
A filling port 32 for filling the grout material with the outer edge 13a is formed.

The grout mold 30 has a plurality of projections 33 projecting inward from the frame and abutting against the outer end surface of the base plate 13 at predetermined intervals over the entire circumference of the frame. The grout form 30 is made of a steel plate having a predetermined thickness as a material capable of sufficiently withstanding the grout material filling pressure, and is formed into a frame shape by press bending or the like.
It is assembled and constructed by welding single members and is factory-produced. In addition, the protrusion 33 can be formed by embossing or the like.

Next, the construction order will be described. The grout formwork 30 is temporarily attached to the base plate 13 in a production plant or the like before the base plate 13 of the steel frame column base is installed on the columnar portion 20 of the concrete of the foundation structure.

At the construction site, the base plate 13 to which the column base 11 is attached is installed on the column 20 together with the grout formwork 30. At this time, the base plate 13
The base plate 13 is tightly fixed on the column-shaped portion 20 by passing the anchor bolt 21 on the column-shaped portion 20 side through the through hole 15 and fastening a nut 22 to the anchor bolt 21.

After the completion of the installation work of the steel frame column base as described above, the grout form 30 is pressed against the upper surface of the column structure 20 of the concrete of the foundation structure, and the bulging shape portion 31 of the grout form 30 is formed on the base plate 13. The filling port 32 defined between the outer edge 13a and the filling port 32 has an inflow port 41 having the same shape as the filling port.
Grout troat 40 having grout for injecting grout material (FIG. 5)
) Is set, and the grout material is poured from the filling port 32 using the grout troit 40 to be filled.

At this time, since the protrusion 33 of the grout form 30 abuts on the outer end surface of the base plate 13, the position of the grout form 30 with respect to the base plate 13 is determined exactly, and the grout form 30 is displaced with respect to the base plate 13. Will not occur. Further, a small gap 34 is formed between the grout formwork 30 and the base plate 13 over the entire circumference of the base plate 13, and the gap 34 serves as an air vent passage when the grout material is filled.

The filling of the grout material is completed when it is confirmed that the grout material has overflowed from the gap 34 at a diagonal to the filling port 32. As described above, the grout form 30
Is pre-formed, prior to mounting the base plate 13 on the columnar portion 20 of the concrete substructure,
In a production factory or the like, the grout formwork 30 can be temporarily set on the base plate 13 in advance, so that the work of assembling the grout formwork at the construction site becomes unnecessary.

Thus, the man-hour at the construction site can be reduced, and even when a plurality of columns 11 are mounted on one column
Further, even in a unit-type building assembled in a factory or the like, the grout formwork 30 for each pillar can be appropriately installed without causing a problem such as a work space. In addition, the position of the bulging shape part 31 of the grout formwork 30 is shown in FIG.
As shown by a broken line in FIG. 5, the position can be set to be suitable for the grout material filling operation.

FIG. 7 shows an embodiment in which the grouting formwork 30 is pressed against the upper surface of the concrete of the foundation structure by the formwork holding member 35. The mold holding metal fitting 35 extends over the upper edge of the grout mold 30 so as to straddle the upper edge 30 of the mold.
and a base plate side fixing portion 38 which sandwiches the reinforcing rib plate 14 of the base plate 13 and which is detachably fixed to the reinforcing rib plate 14 by a thumb screw 37, and has a grout type. The structure is such that the frame 30 is pressed against the upper surface of the foundation structure concrete.

As described above, the grout form 30 is pressed against the upper surface of the concrete of the foundation structure by the form holding metal fitting 35, so that the grout form 30 is
This prevents the occurrence of such a problem that the grout rises, and the grout formwork 30 effectively functions as a grout filling mold. Also, as shown in FIGS. 9 and 10,
A hollow string-shaped sealing member 39 made of an elastic material may be attached to the lower edge 30b where the grout formwork 30 faces the upper surface of the foundation structure concrete.

In this case, as shown in FIGS. 10A and 10B, when the grout form 30 is placed on the columnar portion 20 of the concrete of the foundation structure, the seal member 39 by its own weight. Is compressed and deformed and pressed against the upper surface of the columnar portion 20, and the lower edge 30a of the grout formwork 30 and the columnar portion 20
Sealing between the upper surface and Thereby, even if the contact property with respect to the upper surface of the pillar-shaped part 20 of the grout formwork 30 is bad,
The grout material is prevented from leaking from between the lower edge 30a of the grout formwork 30 and the upper surface of the columnar portion 20.

[0032]

As can be understood from the above description, according to the grout formwork of the steel frame column base according to the first aspect of the present invention, since the grout formwork is formed in advance, the steel frame column base is used as a base. Before installation on structural concrete, grouting formwork can be temporarily set on the base plate in a production factory, etc., which eliminates the need for assembling grouting formwork on the construction site. The number of man-hours can be reduced, and even if multiple steel columns are mounted on one column, even if it is a unit type building that can be assembled in a factory or the like, each steel column can be used without causing problems such as work space. The grout formwork for each leg can be appropriately installed.

According to the grout formwork of the steel frame column base according to the second aspect of the present invention, the position of the grout formwork with respect to the base plate is determined precisely, and the grout formwork does not shift with respect to the base plate. In addition, a small gap is formed between the grout formwork and the base plate over the entire circumference of the base plate, which serves as an air vent passage when the grout material is filled, so that the grout material can be smoothly filled. Furthermore, if the distance between the tips of the protrusions on the opposing surfaces of the grout formwork is smaller than the outer dimensions of the base plate, and the grout formwork is shifted toward the upper surface of the base plate, the protrusions may be applied to the upper surface of the base plate. The grout formwork can be prevented from dropping from the base plate during construction or transportation.

According to the grout form of the steel column base according to the third aspect of the present invention, the seal between the lower edge of the grout form and the upper surface of the concrete of the foundation structure is formed by the sealing member. Leakage of the grout material from the portion is prevented. According to the grout formwork of the steel column base according to the invention as set forth in claim 4, since the formwork is pressed against the upper surface of the concrete of the foundation structure by the formwork holding metal, the grout formwork rises during installation. Is avoided, and the grout formwork effectively functions as a grout filling mold.

Further, according to the construction method of the steel column base according to the fifth aspect of the present invention, before the grout form is formed in advance and the steel column base is installed on the concrete of the foundation structure, the production plant or the like is required. The grouting formwork can be temporarily set on the base plate in advance, and the work of assembling the grouting formwork at the construction site becomes unnecessary, so the number of man-hours at the construction site can be reduced, and multiple Properly install grout formwork for each steel column base without causing problems such as working space, even when steel columns are mounted or in unit type buildings assembled in factories etc. Can be.

According to the construction method of the steel frame column base according to the invention of claim 6, since the grout material is poured and filled using the grout rod, the backflow leakage of the grout material from the filling port is prevented. Can be significantly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a building unit having a steel frame structure to which a grout formwork of a steel frame column base and a method of constructing a steel frame column base according to the present invention are applied.

FIG. 2 is a plan view showing one embodiment of a grout formwork of a steel column base according to the present invention.

FIG. 3 is a front view showing one embodiment of a grout formwork of a steel column base according to the present invention.

FIG. 4 is a plan view showing a state in which a grout formwork of a steel-frame column base according to the present invention is mounted on a base plate.

FIG. 5 is a perspective view showing a state in which a grout formwork of a steel frame column base according to the present invention is mounted on a base plate.

FIG. 6 is an elevation view showing an installed state of a grout formwork of a steel column base according to the present invention.

FIG. 7 is a perspective view showing another embodiment of the grout formwork of the steel column base according to the present invention.

FIG. 8 is a perspective view of a form holding metal used in the grout form of the steel column base according to the present invention.

FIG. 9 is a perspective view showing another embodiment of the grout formwork of the steel column base according to the present invention.

FIGS. 10A and 10B are cross-sectional views showing a seal structure of a grout formwork of a steel column base according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Building unit 11 Column (steel frame column) 13 Base plate 20 Column type part 21 Anchor bolt 22 Nut 30 Grout formwork 31 Swelling shape part 32 Filling port 33 Projection 35 Formwork holding fixture 39 Sealing member 40 Groutroat

Continued on the front page (72) Inventor Katsuya Tanaka 32 Wadai, Tsukuba-shi, Ibaraki Sekisui Chemical Co., Ltd. (72) Inventor Masahiro Suzuki 106 Someya, Sakaimachi, Sarushima-gun, Ibaraki Asahi Kasei Construction Materials Co., Ltd. (72) Inventor Tetsuya Sugano 106 Asahi Kasei Building Materials Co., Ltd., 106, Sakaicho, Sarushima-gun, Ibaraki Prefecture (72) Inventor Naoki Hirashima 3-14-4 Nippeihei, Sumida-ku, Tokyo Inside Okabe Structural System Co., Ltd. (72) Inventor Hiroshi Yamakubo Tokyo 1-8-12 Higashimujima, Sumida-ku Okabe Engineering Co., Ltd.F-term (reference)

Claims (6)

[Claims] 1. A mold for a grout material to be filled in a gap between a base plate of a steel frame column base and concrete of a foundation structure, wherein the mold has an inner shape substantially the same as an outer shape of the base plate, It is formed in advance in a frame shape having substantially the same internal dimensions as the outer dimensions of the base plate, and forms a swelling shape portion that swells outward in the frame in part, and the upper opening of the swelling shape portion is connected to the outer edge of the base plate. A grout formwork for a steel column base, characterized by having a filling port for filling the grout material therebetween. 2. The grout formwork of a steel column base according to claim 1, wherein the formwork has a plurality of protrusions protruding inward of the form and abutting against the outer end surface of the base plate. . 3. The steel frame column base according to claim 1, wherein the formwork is provided with a sealing member made of an elastic material at a lower edge portion facing the upper surface of the foundation structure portion concrete. Grout formwork. 4. The mold is engaged with the upper edge of the form so as to straddle the upper edge of the form so as to press the form against the upper surface of the foundation structure concrete, and is detachably fixed to the base plate. The grout formwork of the steel frame column base according to any one of claims 1 to 3, further comprising a form holding metal fitting. 5. The grout form according to any one of claims 1 to 4, wherein the grout formwork is temporarily attached to the base plate before the base plate of the steel column base is installed on the foundation structure concrete. The base plate attached with the steel frame column is installed together with the grout formwork on the foundation structure concrete to install the steel frame column base,
After the installation is completed, the grout form is pressed against the upper surface of the foundation structure concrete, and the grout material is poured and filled from a filling port defined between the bulging shape portion of the form and the outer edge of the base plate. Construction method of steel column base. 6. A grouting material having a pouring port having the same shape as the filling port for injecting a grout material is set in the filling port, and the grouting material is poured and filled with the grouting material. The construction method of the steel column base according to claim 5.