JPS6015771B2 - Foundation construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an improvement in a large-scale footing foundation construction method in which the foundation beam portion of a reinforced concrete structure or the like is prefabricated.

(Problems to be solved by the invention) Prefabricated footing foundations have been implemented up to now, but prefabricated footing foundations in large-scale construction require the positioning of the prefabricated panels, the strength of the joints, etc. There are several issues that need to be resolved, such as securing them.

This invention was developed to eliminate the various problems associated with prefabricated large footing foundations, and at the same time facilitates the positioning of foundation panels, ensures and strengthens the joints of each joint. This enables labor-saving and efficient construction.

(Embodiments) The configuration of the present invention will be described in detail below based on illustrated embodiments.

First, the main foundation panel 1, which is deep underground in this foundation construction method, will be explained.

The foundation panel 1 (hereinafter referred to as panel 1) is a precast reinforced concrete structure, and there are at least 4 large and 2 types of beams with different constructions.

This foundation construction method is composed of a combination of at least two types of panels 1-1 and 1-2. The reason why the beams have different configurations is that the stress applied to the beam differs depending on the direction of the beam, and it is sufficient to have a beam configuration that matches the stress. Hereinafter, in order to distinguish these two types of panels 1 having different configurations, the panel 1 with a large beam configuration will be referred to as 1-1, and the panel 1 with a small beam configuration will be referred to as 1-2.

The footing forming component portions at the bottom of both sides or one side of the panel are cut out, for example, in an inverted L-shape, to match the shape of the footing 12, which will be stepped later.

Vertical main reinforcing bars 4, foundation main reinforcing bars 5, and stirrups 6 are protruded from this cutout 2, and these serve as reinforcing bars to be integrated with the footing 12. On the other hand, on the upper side of the panel 1, the upper ends 4' and 6' of the vertical main reinforcing bars 4 and the stirrups 6 protrude. 'The horizontal reinforcing bars 11 to be reinforced in the slab 14 are passed through.

Of the two types of panels 1-1 and 1-2 with different beam configurations, the joining side surface 3 of the panel 1-1 with the larger beam configuration has a receiving piece 3 for joining these panels 1-1 and 1-2 together. -1 is provided protrudingly, and on the joint side surface 3 of one of the panels 1-2 with a small beam structure, a pull-neck piece 3-2 that engages with the receiving piece 3-1 is provided.
is provided.

These receiving pieces 3-1 and connecting pieces 3-2 are provided by embedding plates or the like in the panel 1, and reinforced with anchors or the like. When joining the panels 1-1 and 1-2, first, the panel 1-1 with a large beam size having a receiving piece 3-1 is installed in one direction on the curing concrete 9 described later, and then the panel with a small beam size is installed on the curing concrete 9 described later. 1-2 hooking pieces 3-2 to panel 1
The panel 1-2 is installed perpendicularly to the panel 1-1 by hooking it onto the receiving piece 3-1 of the panel 1-1.

Then, by temporarily fixing the engaging portions of the hooking pieces 3-2 and the receiving pieces 3-1 by welding or the like, the two types of panels 1-1
, 1-2 are kept at the same height. Furthermore, a convex portion 3a or a concave portion 3 is provided on the joining side surface 3 of the panel 1 to improve adhesion to concrete that will be poured later.
b are formed, and horizontal reinforcing bars 7 for joining into which vertical reinforcing bars 16 arranged in the gap between the joining sides 3, 3 are inserted are protruded in several places in a loop shape.

Hereinafter, this loop-shaped horizontal reinforcing bar 7 for joining will be simply referred to as a loop bar 7 for simplicity. Next, the construction procedure will be explained. First, the foundation pile 8 is driven into the ground 10 below the joint of the panel 1, and then curing concrete 9 is placed to fix the head of the foundation pile 8.

The curing concrete 9 is poured so that its upper surface is flush with the ground surface. Next, the panel 1 is installed from the curing concrete 9 to the ground 10 on the same horizontal plane as shown below.

Each panel 1 is joined above the curing concrete 9,
The joint side surfaces 3.3 are arranged to face each other, with a gap provided therebetween. In this way, the panels 1 are arranged in a grid pattern as a whole, as shown in FIG. Regarding the installation of the panels 1, as described above, since the beam composition differs depending on the direction, the panels 1 to 1 with the larger beam composition are placed on the curing concrete 9 and the ground 10. By hooking the hooking piece 3-2 onto this receiving piece 3-1, the upper sides of the two types of panels 1-1 and 1-2 are kept at the same height, so the panels 1-2 with smaller beams are suspended in the air. It is placed floating on the ground. Furthermore stirrup 6
Panels 1-1.1-1 and 1-2 adjacent in one direction,
The horizontal reinforcing bars 11, which will become the main horizontal reinforcing bars of the underground beam, are inserted and arranged across the space between 1 and 12.

This horizontal reinforcing bar 11 is the fourth reinforcement at the end of the joint between the panels 1 and 1.
As shown in the figure, it has a loop shape similar to the loop muscle 7. Further, in the gap between the joint sides 3, 3, vertical reinforcing bars 16 are arranged from the footing 12 to the slab 14 by passing through the loop reinforcing bars 7, and this becomes the main reinforcing bars for the concrete that will be placed later. After arranging the horizontal reinforcing bars 13 of the footing 12 and the horizontal reinforcing bars 15 of the slab 14, the footing 1
2. Concrete is poured between the panel joint sides 3 and 3 and the slab 14 in this order. An integrated basic structure is constructed by the above.

(Effects of the Invention) The present invention is as described above, and the foundation panel has a structure that is integrated with the footing and the joint by concrete that is poured later.

In addition, the rear joint is installed on the foundation pile and footing, and these are integrated by vertical reinforcing bars that pass through the loop reinforcement.
The foundation panels are securely and firmly connected to each other. As a result, it becomes possible to ensure sufficient structural strength. Furthermore, since the foundation panels with different beam configurations are configured so that their upper sides are maintained at the same height, it is easy to position and assemble intersecting foundation panels with different configurations.

This makes it possible to prefabricate large footing foundations.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an overview of the present invention, and FIGS. 2 and 3 are a perspective view and an elevation view, respectively, showing a state in which the foundation panels are joined. FIG. 4 is a plan view showing the reinforcement arrangement on the upper side of the foundation panel, and FIG. 5 is a perspective view showing the state in which the slab is placed. 1
: Foundation panel, 1-1: Foundation panel with large beam size, 1-
2: Foundation panel with small beam size, 2: Missing part, 3: Joint side surface, 3-1: Receptacle piece, 3-2: Neck piece, 3a: Convex part, 3b
: Concavity, 4: Vertical main reinforcement, 5: Horizontal main reinforcement, 6: Stirrup, 7: Loop reinforcement, 8: Foundation pile, 9: Curing concrete, 10: Ground, 11: Horizontal reinforcement of underground beam, 12: Footing, 13: Lateral reinforcement of footing, 14: Slab, 15:
Horizontal reinforcement of slab, 16: Vertical reinforcement of joint. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. The footing construction part on both sides or the lower part of one side is removed, and the main reinforcing bars are protruded into the removed part. This consists of a combination of precast reinforced concrete foundation panels of different sizes and beam compositions, and the curing of the head of the foundation pile is performed. After pouring concrete on the same plane as the ground, a beam with a hook piece that engages with the support piece of a large foundation panel that has a support piece protruding from the joint side also protrudes from the joint side. While keeping the upper sides of both foundation panels at the same height by hooking the hook pieces of the small foundation panels, insert the vertical reinforcing bars into the horizontal reinforcing bars for joining that protrude in a loop shape from the side of the joint. Then, each joint side surface that was butted is positioned above the curing concrete with a gap between the joint sides, and the foundation panels are installed in a grid pattern from above the curing concrete to the ground, and then the foundation panels are installed. A foundation construction method characterized by pouring cast-in-place concrete into the missing part to create a footing, and also pouring concrete into the gaps between the joint sides of the foundation panels to join the foundation panels together.