JP3767860B2 - Building basic structure and construction method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a foundation structure of a building and a construction method of the foundation structure.
[0002]
[Prior art]
The basic structure of a steel-frame building for housing includes a flat base portion, a rising portion erected on the base portion, a steel base placed on the rising portion, and the rising of the steel base. An anchor bolt fixed to the portion is provided, and a steel column is attached on the steel base.
[0003]
The base part is a reinforced concrete layer by placing concrete in the reinforcing bar arrangement. In addition, the rising part is a reinforced concrete layer integrated with the base part by placing concrete in the reinforcing bar and anchor bolt arrangement part, and the threaded part of the anchor bolt protrudes upward from this rising part. Yes.
[0004]
Moreover, the foundation structure which made it possible to eliminate the steel foundation by adopting a structure in which the rising portion is a steel foundation beam made of H-shaped steel and a steel column is attached to the steel foundation beam. It has been proposed (for example, Patent Document 1).
[0005]
In the basic structure of this Patent Document 1, a part of reinforcing bars is arranged in a base portion, a plurality of jack metal fittings are arranged in the bar arrangement portion, and a steel foundation beam is placed on each jack metal fitting. After adjusting the height position of the steel foundation beam by operating the metal fittings, the remaining reinforcing bars and anchor bolts for fixing the steel foundation beam are arranged in the reinforcement section, and the lower side of the steel foundation beam is placed. A concrete reinforced concrete layer as a base part is constructed by placing concrete in the reinforcing bar, and the lower end of the steel column is attached to the steel foundation beam with fixing bolts welded to the upper surface of the steel foundation beam in advance. It is configured.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-303583
[Problems to be solved by the invention]
However, in the foundation structure having the anchor bolt at the rising portion, the steel base is processed at the factory, so that the attachment portion by the anchor bolt can be processed with relatively high accuracy, whereas the anchor Since the bolt excluding the threaded portion is embedded in the reinforced concrete layer, it is difficult to determine the position accuracy of the threaded portion in the horizontal direction, and the position of the threaded portion in the horizontal direction is easily misaligned when placing concrete. As a result, it took a lot of time and labor to install the steel base at the construction site of the foundation structure.
[0008]
Moreover, in the foundation structure of patent document 1, in order to adjust the height position of a steel foundation beam with the several jack bracket arrange | positioned at the reinforcement part, adjustment work of the height position of a steel foundation beam In addition, there is a problem that a plurality of jack metal fittings are embedded in a reinforced concrete layer and the jack metal fittings cannot be reused. In addition, it is necessary to carry steel steel beams such as steel columns to the construction site after the steel foundation beam is carried to the construction site before the concrete is placed, and the reinforced concrete layer is constructed by placing concrete. In addition, the number of times the steel frame member is carried in becomes plural, and the transportation cost is higher than that in a single carry-in.
[0009]
The present invention has been made in view of such circumstances, and the main purpose is to laminate a mortar layer on a reinforced concrete layer, dispose a steel foundation beam above the mortar layer, and place a steel column on the steel foundation beam. It is in providing the foundation structure of the building which can perform easily the height adjustment of a steel foundation beam, and the horizontal positioning of a steel column by setting it as the structure to attach.
[0010]
In addition, other objects are standardized in advance, and a plurality of beam members processed at a factory are combined to form a steel foundation beam having an appropriate shape corresponding to the shape of the building, and the corners of the steel foundation beam are formed. An object of the present invention is to provide a foundation structure of a building that can easily position a steel column in the horizontal direction with higher accuracy by ensuring a perpendicularity.
[0011]
Another object is to provide a steel foundation beam with a through-hole penetrating in the width direction of the steel foundation beam, facing the one side surface of the steel foundation beam, and inserting the steel foundation with a screw shaft inserted into the penetration hole. An object of the present invention is to provide a building foundation that can be easily attached to a steel foundation beam by providing a hidden plate attached to the beam.
[0012]
Furthermore, another object is a mortar placing process in which a molten mortar is placed on the upper side of the reinforced concrete layer to construct a mortar layer, and a beam placing process in which a steel foundation beam is disposed in the mortar layer after the mortar layer is cured. And a beam fixing step of fixing the steel foundation beam with anchor bolts, and a column attachment step of attaching a steel column to the steel foundation beam, thereby adjusting the height of the steel foundation beam, An object of the present invention is to provide a construction method for a foundation structure of a building that can simplify the horizontal positioning of columns and can reduce the number of times of carrying in steel members.
[0013]
[Means for Solving the Problems]
The basic structure of the building according to the first invention includes a reinforced concrete layer, an anchor bolt embedded in the reinforced concrete layer so that its thread portion protrudes upward, a mortar layer laminated on the reinforced concrete layer, and the mortar. A steel foundation beam disposed above the layer and fixed by the anchor bolts, and a steel column attached to the steel foundation beam, the steel foundation beam extending in the width direction of the steel foundation beam It has a through-hole penetrating, and has a concealed plate attached to the steel foundation beam by a screw shaft that faces one side surface of the steel foundation beam and is inserted into the through-hole. To do.
[0016]
The construction method of the foundation structure of the building according to the second invention includes a reinforcing bar placement process in which reinforcing bars and anchor bolts are arranged, and a concrete placement in which concrete is placed on the reinforcing bar and anchor bolt placement parts to construct a reinforced concrete layer. A mortar placing step in which a molten mortar is placed on the upper side of the reinforced concrete layer to construct a mortar layer, and a beam placement step in which a steel foundation beam is disposed in the mortar layer after the mortar layer is hardened. And a beam fixing step of fixing the steel foundation beam by the anchor bolt, and a column attachment step of attaching a steel column to the steel foundation beam.
[0017]
In the first invention and the second invention, by placing molten mortar on the upper side of the reinforced concrete layer as the base portion, the mortar flows so that the surface is horizontal, and the mortar is naturally cured. It is possible to adjust the height of the steel foundation beam by waiting to do. Therefore, it is easier to adjust the height as compared with the case of using the jack metal, and the mortar is less expensive than the jack metal, so that the cost of the foundation structure can be reduced. Moreover, reinforced concrete layers, mortar layers, and anchor bolts are constructed at the construction site, and steel foundation beams and steel columns can be configured according to the shape of the building by combining standardized and factory-processed members. Therefore, the steel column can be positioned with high accuracy in the horizontal direction. Therefore, it is not necessary to position the steel column in the horizontal direction at the construction site. The steel foundation beam and steel column processed at the factory are brought into the construction site, and the steel foundation beam is fixed by anchor bolts. Can be easily assembled by attaching to a steel foundation beam, and workability at the construction site can be improved. Moreover, since the steel foundation beam can be carried into the construction site together with the steel member, the transportation cost of the steel member can be reduced.
[0019]
In the first invention, the hidden plate is disposed at a position facing one side surface of the steel foundation beam, and the screw plate is inserted into the through hole of the steel foundation beam, thereby removing the hidden plate from the steel foundation beam. Therefore, the position shift of the hidden plate can be eliminated.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
FIG. 1 is a cross-sectional view showing the structure of the foundation structure of a building according to the present invention, FIG. 2 is an enlarged cross-sectional view of a hidden plate attaching portion, and FIG. 3 is a back side cross-sectional view of the hidden plate portion.
A foundation structure according to the present invention is a foundation structure of a steel frame building, and a reinforced concrete layer 1 that is a flat base portion and a plurality of pieces embedded in the reinforced concrete layer 1 so that the threaded portion protrudes upward. Anchor bolt 2, a mortar layer 3 laminated on the upper side of the reinforced concrete layer 1, a steel foundation beam 4 disposed on the upper side of the mortar layer 3 and fixed by the anchor bolt 2, and the steel foundation beam 4 is provided with a steel column 5 attached to the upper surface of 4 and a hidden plate 6 attached to one side of the steel foundation beam 4.
[0021]
FIG. 4 is a plan view of the lower part from the mortar layer.
In the reinforced concrete layer 1, the reinforcing bar 7 and a plurality of anchor bolts 2 are arranged in the recess of the excavated ground, and the threaded portion of each anchor bolt 2 protrudes upward from the mortar layer 3 by placing concrete. It is constructed in a flat shape (see FIG. 1). A plurality of anchor bolts 2 are arranged in the vicinity of the joint portion of each beam member of the steel foundation beam 4 formed so that a plurality of beam members are joined to form an appropriate shape (see FIG. 4).
[0022]
The mortar layer 3 is an upper side of the reinforced concrete layer 1, and a molten mortar is placed on a portion where the steel foundation beam 4 is disposed (see FIGS. 1 and 4), and the mortar is naturally hardened by placing it. The surface is horizontal.
[0023]
5 is a plan view of a steel foundation beam portion, FIG. 6 is an enlarged perspective view of a part of the steel foundation beam, and FIG. 7 is a beam assembly for joining a plurality of beam members constituting the steel foundation beam. It is a perspective view which shows the structure.
The steel foundation beam 4 is formed by integrating a rising portion on a base portion and a steel base placed on the rising portion in a general foundation structure for a steel-framed housing. Both ends of the member 40 are coupled by the beam coupling body 8, and the steel foundation beam 4 is configured corresponding to the shape of the building. Each beam member 40 includes two plate portions 4a and 4b that are spaced apart from each other and are vertically arranged. Each plate portion 4a and 4b is made of an H-shaped steel having a plurality of first through holes 41, and has an appropriate length. The beam member 40 is coupled by the beam coupling body 8 to form a frame shape.
[0024]
The first through holes 41 of the lower plate portion 4b are formed at four positions corresponding to the anchor bolts 2 with a diameter larger than that of the anchor bolts 2, and the horizontal position of the threaded portion of the anchor bolt 2 is The anchor bolt 2 can be inserted into the first through hole 41 even if it is slightly deviated. Four first through holes 41 are formed in one steel column 5 at a position corresponding to the steel column 5 in the first through hole 41 of the upper plate portion 4a. Further, a plurality of second through holes 42 penetrating in the width direction of the steel foundation beam 4 are formed in the connecting plate portion 4c for connecting the upper and lower plate portions 4a and 4b, spaced apart in the longitudinal direction. In addition, a joining plate 43 having a plurality of insertion holes 43 a is provided at both longitudinal ends of the beam member 40, and further, insertion holes 44 for attaching a cane member are provided at both longitudinal ends of the beam member 40. It has been.
[0025]
The beam assembly 8 has a six-face structure by joining the joining plates 8b to both ends and both sides of the H-shaped steel 8a, and a plurality of insertion holes 81 are formed in each of the six faces.
When a plurality of beam members 40 are coupled by the beam combination 8, the plurality of beam members 40 are arranged in a frame shape in plan view as shown in FIG. 5, and the beam combination 8 is arranged between adjacent beam members 40. A bolt (not shown) is inserted into the insertion hole 81 of the beam coupling body 8 and the insertion hole 43a of the joining plate 43 of the steel base beam 4, and the nuts are fastened to the bolts to be coupled to each other. The Further, between the longitudinal ends of the intersecting beam members 40, the cane member 15 is attached by bolts and nuts (both not shown) that are inserted into the insertion holes 44. By attaching this cane member 15, the squareness of the joint portion of the steel foundation beam 4 can be obtained with high accuracy, and the horizontal position of the steel column 5 can be obtained with higher accuracy.
[0026]
The steel column 5 is composed of a pipe having a column combined body 51 fixed to its end face. The column combination 51 includes a column portion 51a having four plate portions intersecting with a cross, a joining plate 51b fixed to one end of the column portion 51a, and fixed to the other end of the column portion 51a. A joining plate 51c having a third through hole 52 that should correspond to the first through hole 41, and the joining plate 51b is fixed to the end surface of the steel column 5.
[0027]
The hidden plate 6 includes a molded plate portion 6a of extruded cement, and a reinforcing plate 6b joined to the back surface of the molded plate portion 6a, and a fourth plate that should correspond to the second through hole 42. A through hole 61 is formed in the molded plate portion 6a and the reinforcing plate 6b. Further, a substantially U-shaped attachment member 10 having a through hole in an opposing plate piece is interposed between the reinforcing plate 6b and the connecting plate portion 4c, and the attachment member extends from the fourth through hole 61. The screw plate 11 is inserted into the 10 through holes and the second through hole 42, and the nut 12 is screwed onto the screw shaft 11 to attach the hidden plate 6 to the steel foundation beam 4.
[0028]
In the figure, reference numeral 13 denotes a plate wall disposed between adjacent steel pillars 5, and 14 denotes that rainwater and the like enter the steel foundation beam 4 through a gap between the lower portion of the plate wall 13 and the upper portion of the hidden plate 6. It is a draining board to prevent.
[0029]
Next, the construction of the foundation structure configured as described above is performed by the following method.
(1) The reinforcing bar 7 and a plurality of anchor bolts 2 are arranged in the recessed portion of the excavated ground (bar arrangement process).
(2) Concrete is placed on the arrangement part of the reinforcing bar 7 and the anchor bolt 2 to construct a flat reinforced concrete layer 1 as a base part, and the threaded part of each anchor bolt 2 protrudes upward from the reinforced concrete layer 1. (Concrete placing process).
(3) The mortar layer 3 is constructed by placing molten mortar on the upper part of the reinforced concrete layer 1 where the steel foundation beam 4 is placed (see Fig. 4), and the mortar layer 3 is hardened by natural drying. (Mortar placing process). In this case, the thread portion of each anchor bolt 2 protrudes upward from the mortar layer 3.
(4) A mortar layer is formed of a steel base beam 4 made of H-shaped steel and formed by joining a plurality of beam members 40 having first through holes 41 to upper and lower plate portions 4a and 4b so as to have an appropriate shape. 3 is arranged on (3) (beam arrangement process).
(5) When the steel foundation beam 4 is placed on the mortar layer 3, the screw portion of the anchor bolt 2 is inserted into the first through hole 41 of the lower plate portion 4b, and the nut 16 is inserted into the screw portion. The steel foundation beam 4 is fixed on the mortar layer 3 by tightening (beam fixing process).
(6) The steel column 5 to which the column combination 51 is fixed is placed on the upper plate portion 4a of the steel foundation beam 4, and the bonding plate 51c of the column combination 51 is bonded to the upper plate portion 4a. The bolt 9 is inserted from the first through hole 41 of the upper plate portion 4a into the third through hole 52 of the column combined body 51, and the nut 17 is tightened to the bolt 9, whereby the column combined body 51 and eventually the steel frame The column 5 is attached to the steel foundation beam 4 (column attachment process).
(7) The hidden plate 6 is disposed at a position facing one side surface of the steel foundation beam 4, and the attachment member 10 is interposed between the hidden plate 6 and the connecting plate portion 4 c, and the fourth through hole 61 is provided. Then, the screw shaft 11 is inserted into the second through hole 42, and the nut 12 is fastened to the screw shaft 11 to attach the hidden plate 6.
[0030]
When constructing the foundation structure as described above, by placing molten mortar on the upper side of the reinforced concrete layer 1 as the base portion, the mortar flows so that the surface is horizontal, and the mortar is in a horizontal state. Since it is naturally dried and hardened, the height adjustment work of the steel foundation beam support surface a can be easily performed. Therefore, it is easier to adjust the height as compared with the case of using the jack metal, and the mortar is less expensive than the jack metal, so that the cost of the foundation structure can be reduced. Moreover, when the steel column 5 is constructed, the steel foundation beam 4 can be carried into the construction site together with the steel column 5, so that the number of times the steel member is conveyed can be reduced, and the conveyance cost can be reduced.
[0031]
Further, the steel foundation beam 4 also serves as a steel foundation, and since the steel foundation beam 4 and the steel column 5 can be processed at the factory, the horizontal position of the steel column 5 can be obtained with high accuracy. Moreover, the steel column 5 can be easily attached by the bolt 9 inserted into the first through hole 41 at the construction site.
[0032]
At the construction site, the threaded portion of the anchor bolt 2 is inserted into the first through hole 41 provided in the lower plate portion 4b of the steel foundation beam 4, and the nut 16 is tightened to the threaded portion. The steel foundation beam 4 can be fixed to the reinforced concrete layer 1. The anchor bolt 2 in this case fixes the steel foundation beam 4 to the reinforced concrete layer 1, and the first through hole 41 of the plate portion 4b is formed to have a larger diameter than the threaded portion of the anchor bolt 2. Even when the positional accuracy such as the horizontal position of the threaded portion of the anchor bolt 2 is not obtained, the steel foundation beam 4 can be fixed to the reinforced concrete layer 1.
[0033]
【The invention's effect】
As described above in detail, according to the first and second inventions, the height of the steel foundation beam support surface can be easily adjusted by the mortar layer, and the reinforced concrete layer, the mortar layer, and the anchor bolt can be used at the construction site. The steel foundation beams and steel columns are standardized and are systematized so that they can be configured according to the shape of the building with a combination of parts processed at the factory. Positioning can be performed with high accuracy, and workability at the construction site can be improved. Moreover, since the steel foundation beam can be carried into the construction site together with the steel member, the transportation cost of the steel member can be reduced.
[0035]
According to the first invention, the hidden plate is disposed at a position facing one side surface of the steel foundation beam, and the screw plate is inserted into the through hole of the steel foundation beam, thereby turning the hidden plate into the steel foundation beam. Since it can be attached, the displacement of the hidden plate can be eliminated.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a configuration of a building foundation structure according to the present invention.
FIG. 2 is an enlarged cross-sectional view of a hidden plate attachment portion.
FIG. 3 is a rear sectional view of a hidden plate portion.
FIG. 4 is a plan view of a lower portion from the mortar layer.
FIG. 5 is a plan view of a steel foundation beam portion.
FIG. 6 is an enlarged perspective view of a part of a steel foundation beam.
FIG. 7 is a perspective view showing a configuration of a beam coupling body for coupling a plurality of beam members constituting a steel foundation beam.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Reinforced concrete layer 2 Anchor bolt 3 Mortar layer 4 Steel foundation beam 42 Through hole 5 Steel column 6 Hidden plate 11 Screw shaft

Claims (2)

A reinforced concrete layer, an anchor bolt embedded in the reinforced concrete layer so that its thread portion protrudes upward, a mortar layer laminated on the reinforced concrete layer, and disposed above the mortar layer and fixed by the anchor bolt A steel foundation beam and a steel column attached to the steel foundation beam , the steel foundation beam having a through-hole penetrating in the width direction of the steel foundation beam, A foundation structure for a building, comprising a concealed plate that is attached to the steel foundation beam by a screw shaft that faces one side surface of the foundation beam and is inserted into the through hole.   Placement process of placing reinforcing bars and anchor bolts, Concrete placing process of placing concrete on the placement part of the reinforcing bars and anchor bolts to construct a reinforced concrete layer, and placing molten mortar on the upper side of the reinforced concrete layer A mortar placing process for constructing a mortar layer, a beam placement process for placing a steel foundation beam in the mortar layer after the mortar layer is cured, and beam fixing for securing the steel foundation beam with the anchor bolt The construction method of the foundation structure of a building characterized by including the process and the pillar attachment process of attaching a steel-frame pillar to the said steel foundation beam.

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