JPH0328527B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a foundation construction method and foundation structure for relatively small-scale buildings such as steel-frame factories, lightweight steel-frame houses, and wooden houses.

The conventional foundation for this type of building is a series of concrete cast in-situ around the entire perimeter of the building to be constructed. In other words, in the past, concrete was poured on-site in addition to the foundation part on which the column legs rest, as well as the part in between. However, the area in between is not a major part in terms of structural durability, and does not necessarily require sufficient strength and thickness to support the building's load. This method had the drawbacks of requiring extra concrete and requiring a lot of effort and time for foundation construction.

The present invention solves these drawbacks. After concrete foundations for mounting and fixing column legs are poured on-site at predetermined intervals, the concrete foundations are placed between the outer surfaces of adjacent concrete foundations. It is characterized by attaching a horizontally long precast concrete panel to it using anchor bolts buried therein.

Embodiments of the present invention will be described in detail below with reference to the drawings.

Figures 1 to 4 show a first embodiment of the present invention, in which prismatic concrete foundations 1 are vertically cast at predetermined intervals at predetermined locations in the ground excavated to a required depth (on-site casting). )do. The enlarged part 2 at the lower end of each concrete foundation 1 is buried underground, and the upper end protrudes above the ground. In addition, each concrete foundation 1
At the time of driving, a plurality of pillar fixing anchor bolts 3 are buried in the upper surface and one panel mounting anchor bolt 4 is buried in the outer surface.

Next, after providing a base mortar layer 5 on the upper surface of each concrete foundation 1, a base plate 7 of a steel column 6 is placed thereon, and the base plate 7 is tightly fastened to the anchor bolt 3 for fixing the column. In other words, there are 6 steel columns on each concrete foundation 1.
erected vertically.

An L-shaped rim attachment piece 8 is fixed (welded) to the lower end of the outer surface of each steel column 6. Two or three rim members 9 can be attached to each other by this rim attachment piece 8.
It is installed horizontally between the lower ends of more than one steel frame column 6.
That is, the bottom furring member 9 is attached to the lower side of the horizontal part of the furring attachment piece 8 using bolts 10 and nuts 11.
to be fixed. In this example, channel steel with a lip is used as the shell material 9, and a plurality of panel upper support members 12 are fixed (welded on site or in a factory) at predetermined intervals to the lower surface of the frame material 9. . The panel upper support member 12 has an inverted U-shaped panel fitting portion 13 formed at its lower end.

Next, a horizontally long precast concrete panel (hereinafter abbreviated as a panel) 14 is vertically erected between the adjacent concrete foundations 1.

That is, the position adjustment nut 15 is screwed into the protruding threaded portion of the panel mounting anchor bolt 4, and the anchor bolt 4 is fitted into a hole (not shown) provided in the panel lower support member 16, and the anchor bolt 4 is inserted into the hole (not shown) provided in the panel lower support member 16. 4 to support the panel lower support member 16, and fit the upper end of each panel 14 into the panel fitting part 13 of the panel upper support member 12,
After fitting the lower left corner and lower right corner of the adjacent panel 14 into the U-shaped panel fitting portion 17 at the lower end of the panel lower support member 16, the left end and lower right corner of the adjacent panel 14 are fitted. The right end portion is tightly connected to the panel mounting anchor bolt 4 with a tightening nut 19 via the holding plate 18. For the concrete foundation 1 located at the corner of the building, the panel 14 is clamped by L-shaped inner and outer clamping plates 20, 21 and fastened to the anchor bolts 4.

To connect the panels 14 between adjacent concrete foundations 1, as shown in FIGS. Clamp it using the .

After the panels 14 are erected on the concrete foundation 1 in this way, concrete or mortar 25 is poured between the panels 14 and the concrete foundation 1, and backfilling with earth and sand is carried out to lower the lower part of the panels 14 into the ground. bury it inside. Note that the space between the panel 14 and the concrete foundation 1 may be simply backfilled with earth and sand.

On the other hand, on the outer surface of the steel column 6, furring members (not shown) are constructed in multiple stages above and below the outer surface of the steel column 6 above the furring member 9 at the lowest stage, and outer wall plates 2
6. In this case, the draining plate 27 is sandwiched between the lowermost furring material 9 and the lower end of the outer wall board 26, and the lower side of the draining plate 27 is positioned outside the upper end of the panel 14, and the outer wall board 26 The area between the panels 14 is closed from the rain.

In the second embodiment shown in FIGS. 5 and 6, the left and right ends of the adjacent panels 14 are replaced with the aforementioned panel lower support members 16, and retainer plates 28, 2 on both the inside and outside sides are used.
The only difference from the first embodiment is that it is clamped at 9 and fastened to the anchor bolt 4, and the rest is the same as the first embodiment.

In the third embodiment shown in FIGS. 7 and 8, two panel mounting anchor bolts 4 are buried parallel to the left and right in each concrete foundation 1, and holes (not shown) are provided at the left and right ends of the panels 4. ) are fitted onto the anchor bolts 4, and the left and right ends of the adjacent panels 14 are held between the inner and outer pressing plates 30, 31 and tightly tied to the left and right anchor bolts 4. This third
In the embodiment, a cutout step 32 is formed on the upper edge of the outer surface of the panel 14, and the cutout step 32 is fitted into the panel fitting portion 13 of the panel upper support member 12. This structure has the advantage that the amount of outward protrusion of the draining plate 27 can be reduced. Also, the third
In the embodiment, the panel upper support member 12 is tightly fixed to the lowermost furring member 9 using a pressing plate 33 and bolts and nuts.

In the fourth embodiment shown in FIGS. 9 to 11, two panel mounting anchor bolts 4 are buried parallel to the left and right in each concrete foundation 1, and holes (not shown) are provided at the left and right ends of the panels 4. ), and the left and right ends of the panel 4 are simply held between a position adjustment nut 15 and a tightening nut 19 and fastened to the anchor bolt 4. In this fourth embodiment, a panel 14 is used which has a large number of ribs 34 integrally protruding from both the inside and outside sides.

In addition, as a method for connecting panels 14 between adjacent concrete foundations 1, in addition to the method shown in FIGS. 3 and 4, as shown in FIGS. hole 3
5 respectively, and clamp the left and right ends of both panels 14 with the inner and outer holding plates 37 and 38, or as shown in Figs. A method of fitting the lower corner of the panel 14 and tightening it by passing two bolts 36 through holes 35 provided at the left and right ends of both panels 14, or as shown in FIGS. 16 and 17. There is a method of clamping (using bolts and nuts) between a rear pressing plate 41 having a panel fitting part 40 at the lower end and a front pressing plate 42.

As mentioned above, the foundation construction method of the present invention fixes the legs of the columns and casts concrete only in the foundation part (the main part in terms of structural durability) that supports the load of the building, and the part in between is made of precast concrete. Since it is simply blocked by a panel,
Foundation work is significantly simpler than before, the minimum amount of concrete required is sufficient, and construction costs are reduced.

In addition, according to the basic structure of the present invention, the upper end of the precast concrete panel is fitted into the inverted U-shaped panel fitting part of the panel upper support member fixed to the frame material, so that in addition to the above effects, This has the effect of stably supporting the precast concrete panel, especially the middle part.

[Brief explanation of the drawing]

The drawings show the assembled state according to the embodiment of the present invention, and FIGS. 1 to 4 are a longitudinal cross-sectional view, a partially cutaway plan view, a front view of the first embodiment, and FIGS. 3-I, respectively.
5 and 6 are longitudinal sectional views and partially cutaway front views of the second embodiment; FIGS. 7 and 8 are longitudinal sectional views and partially cutaway plan views of the third embodiment; 9th to 1st
Figure 1 is a vertical cross-sectional view, partially cutaway plan view, and plan view of the fourth embodiment, and Figures 12, 13, 14, 15, and 16, 17 respectively show the connection method between precast concrete panels. Showing another example, the first
Figures 2, 14 and 16 are front views, Figures 13, 15 and 17
The figures are a cross-sectional view of the line position in FIG. 12, the line position in FIG. 14, and the line position in FIG. 16, respectively. 1... Concrete foundation body, 4... Anchor bolt, 6... Steel column, 14... Precast concrete panel, 12... Panel upper support member,
13...Panel fitting part.

Claims (1)

[Scope of Claims] 1. After concrete foundations for mounting and fixing the legs of columns are cast on-site at predetermined intervals, anchors are buried between the outer surfaces of adjacent concrete foundations. A building foundation construction method characterized by attaching oblong precast concrete panels with bolts. 2. The building foundation construction method according to claim 1, characterized in that at least the lower end of the precast concrete panel is buried underground. 3 Concrete foundations for mounting and fixing column legs are buried in the ground at specified intervals, and horizontally long anchor bolts are installed between the outer surfaces of adjacent concrete foundations. At the same time as attaching the precast concrete panel, the panel upper support member is fixed to the furring material installed between the lower ends of the columns, and the precast concrete is attached to the inverted U-shaped panel fitting part of the panel upper support member. A basic structure of a building characterized by fitting the upper ends of panels.