JPH05112949A - Execution method of foundation - Google Patents

Abstract

PURPOSE:To save man-power in field work by providing a liner to the bottom of a cutting section excavated in a specific depth, and placing concrete between permanent forms after permanent forms and underground beam reinforced cages built up in advance are arranged by making the liner as a scale. CONSTITUTION:A cutting having a specific depth is excavated in the ground A, and bedding sand or blinding concrete is placed on the bottom. After that, a pair of receiving rails 2 having an L-shaped section are connected with a coupling member 3, a liner having a reinforced receiving section 4 to the upper part at a specific interval is formed and is placed into the cutting. Then, after permanent forms 6 are erected to the rails 2 to bury earth in the outside cutting section, underground beam reinforced cages C are mounted and fixed to the receiving section 4, and concrete is placed between the forms 6. In a pedestal section, a pedestal reinforcing bar and the end of the liner are installed and fixed to a footing concrete formed in the upper part of the foundation pillar. In addition, after the reinforced cages C are installed, the forms 6 can be erected. According to the constitution, a cutting width can be minimized and, at the sane time, man-power in field work can be saved with the reinforcing bars built up in advance.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a cloth foundation or an underground beam and a column base using a scrap frame.

[0002]

The conventional general method of constructing a cloth foundation is to cut the ground and then assemble the reinforcing bars on-site.
Formwork is assembled on both sides using formwork binding metal fittings such as separators, and after pouring concrete, it is demolded waiting for the concrete to harden. Is.

The present invention was developed to save labor in the conventional method.

[0004]

According to the present invention, a root is cut to a predetermined depth in the ground, a liner is installed at the root cutting bottom, a liner is used as a ruler to establish a scrap frame, and the outside of the scrap frame is set. Backfill, then drop the pre-assembled rebar between the scrap frames, then place concrete between the scrap frames.Construction method of the foundation and root cutting to a predetermined depth in the ground, and liner on the root cutting bottom. Installed and installed the pre-assembled column base rebar on the foundation and installed the pre-assembled underground rebar using the liner as a ruler, and established a scrap frame around the column base rebar and the underground beam rebar. It is a foundation construction method characterized by backfilling the outside of the scrap frame and then placing concrete between the scrap frames.

[0005]

The first invention comprises the following steps. First, a root cutting B having a predetermined depth, that is, a depth corresponding to the rooting depth of the cloth foundation, is formed on the ground A, and laying sand is laid on the root cutting bottom,
Alternatively, waste concrete is poured and the liner 1 is installed on it. This liner 1 is a double-sided rail 2 with an L-shaped cross section.
Are connected by a connecting member 3, and an upper portion of the connecting member 3 has a reinforcing bar receiving portion 4, and a rising edge 5 and a receiving rail 2 form a groove shape and are arranged at predetermined intervals in the length direction. The bottom of a scrap frame 6 made of a precast concrete plate or the like with ribs is fitted to the inside of the receiving rail 2 to establish it, and the earth and sand are immediately buried in the outer root cutting portion of the scrap frame 6.

Next, the pre-assembled beam reinforcing bar, that is, the underground beam reinforcing bar cage C, in which the main reinforcing bar and the stirrup bar are assembled, is dropped into the scrap frame 6, and the position thereof is the reinforcing bar receiving portion 4 of the liner 1 at the root cutting bottom.
Fixed by. In addition, when the underground beam rebar cage is dropped, the stopper 12 on the upper portion of the scrap frame 6 is temporarily removed.

Then, concrete 7 is placed between the scrap frames 6 to complete the foundation.

At the column base, footing concrete 8 is placed on the pile foundation, and the end of the liner 1 is attached to the footing concrete 8 by a hole-in anchor 9.
Fixed by also this footing concrete 8
The column base rebar D assembled in advance is installed above.

The second aspect of the invention is the same until the liner 1 is installed. Then, the previously assembled column base rebar D is installed so as to cover the anchor bolt 10 drilled on the footing concrete 8, and the liner 1 is installed. Underground girder rebar cage C is installed with the ruler as a ruler, and underground girder rebar cage C and column base rebar D
And are connected using a grout coupler 11, then a scrap frame 6 is established around the grout coupler 11, the upper part of is connected with a stopper 12, the outside of the scrap frame 6 is backfilled, and then between the scrap frames. Place concrete.

[0010]

EFFECTS OF THE INVENTION The present invention is constructed as described above, and the scrap frame also serves as the earth retaining sheet pile, and after the root cutting, the scrap frame is dropped from the top and immediately backfilled. Since it is not assembled at first and it is dropped in the first assembly, the root cutting width can be minimized except for the connecting work space of the rebar basket, and the amount of root cutting is also small, and in combination with the front assembly of the reinforcing bar, labor saving on site work The conversion is remarkable.

[Brief description of drawings]

FIG. 1A is a cross-sectional view of the process of carrying out the first invention, wherein FIG.

FIG. 2 is a perspective view of a liner installed state.

FIG. 3 is an enlarged cross-sectional view of a state where a reinforcing bar is dropped.

FIG. 4 is a perspective view of the construction process of the embodiment of the first invention.

FIG. 5 is a perspective view of the construction process of the embodiment of the first invention.

FIG. 6 is a perspective view of the construction process of the embodiment of the first invention.

FIG. 7 is a perspective view of the construction process of the embodiment of the first invention.

FIG. 8 is a perspective view of the construction process of the embodiment of the first invention.

FIG. 9 is a perspective view of the construction process of the embodiment of the second invention.

FIG. 10 is a perspective view of the construction process of the embodiment of the second invention.

FIG. 11 is a perspective view of the construction process of the embodiment of the second invention.

FIG. 12 is a perspective view of the construction process of the embodiment of the second invention.

[Explanation of Codes] A ... Ground, B ... Root Cutting, C ... Underground Beam Reinforcement Basket, D ... Column Base Reinforcing Bar 1 ... Liner, 2 ... Receiving Rail, 3 ... Connecting Material, 4 ... Reinforcing Bar Receiving Section, 5 ... Rise, 6 ... Waste form, 7 ... Concrete, 8
… Footing concrete, 9… Hole-in anchor,
10 ... Anchor bolt, 11 ... Coupler, 12 ... Stopper.

Claims (2)

[Claims] 1. A root is cut to a predetermined depth in the ground, a liner is installed on the root cutting bottom, a liner is used as a ruler to establish a scrap frame, the outside of the scrap frame is backfilled, and then the scrap frame. A method of constructing a foundation, characterized by placing rebars assembled in the interim by dropping and then placing concrete between the scrap frames. 2. The ground is cut to a predetermined depth, a liner is installed at the root cutting bottom, the pre-assembled column base rebar is installed on the foundation, and the pre-assembled underground beam rebar is used as a ruler. Installation, construction of a scrap frame around the column base rebar and underground beam rebar, backfilling the outside of the scrap frame, then placing concrete between the scrap frames Law.