JPH06212644A - Foundation construction method - Google Patents

Abstract

PURPOSE:To shorten the construction period by doubling plates on both sides of a groove so as to stop the collapse of the groove and burying the doubled plates in place and omitting back-filling work. CONSTITUTION:Grooves 12 whose sides are parallel are excavated underground from the ground 11 in parallel. Then, the ground between the both grooves 12 is excavated to a specified depth where an excavator 13 is installed. Plates 14 are doubled on both sides of each of the grooves 12. The upper edges of the plates 14 are aligned with the excavation bottom of the excavator 13 or it is arranged to project slightly above the ground 11. The lower parts of the plates 14 are fixed by means of an angle 17 while the upper parts of the plates 14 are fixed by means of a separator 19, thereby maintaining the plates 14 on the sides of the grooves. Then, after reinforcing bats are placed, concrete is simultaneously cast on the grooves 12 and the excavator 13. Since the plates 14 are buried in place, it is possible to shorten the construct period accordingly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a building foundation.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional method for constructing a building foundation excavates a groove 2 from the ground 1 toward the ground.

The opposing distance between both sides of the groove 2 is small (inverted trapezoid) from the ground 1 to the root cutting bottom 3.

Next, the molds 4 are arranged on both sides in the groove 2 so as to face each other. The facing intervals of the mold 4 are equal in each part.

After the reinforcing bars 5 have been arranged in the form 4, concrete 6 is placed as shown in FIG.

After the cast concrete 6 is hardened, as shown in FIG. 6, the form 4 is removed and the soil 8 is backfilled in the gap between the formed underground beam 7 and the side surface of the groove 2.

After that, concrete 9 for soil is poured.

[0008]

When the construction method as described above is adopted, since an inverted trapezoidal groove having a width larger than that of an underground beam is excavated, the amount of soil discharged is significantly increased, and the cost of unloading is increased. There was a rising problem.

[0009] Further, since the formwork is removed after the underground beam is constructed and the soil discharged to the void of the groove is backfilled, it takes time and labor, especially because the soil once transported to the site is brought in. , Construction costs will rise significantly.

Further, since the concrete for soil is placed after the construction of the underground girder, the construction period becomes long and there is a problem that the underground girder and the concrete for soil are required to be carried in separately.

Therefore, an object of the present invention is to provide a method of constructing a foundation which eliminates the need for backfilling of grooves and simultaneously performs concrete pouring between an underground beam and a soil.

[0012]

In order to solve the above-mentioned problems, the present invention excavates grooves whose both side surfaces are parallel to each other from the ground surface to the ground, and at the same time, defines the ground surface between the both grooves. After digging up to the depth of the above, the plate-like body is overlapped on the side surface of each groove, and the overlapped state of the plate-like body is maintained by using an appropriate means, and then a reinforcing bar is laid in each groove. After that, a method of placing concrete in each of the grooves and in the dug portion between the grooves is adopted.

[0013]

The plate-like members superposed on both side surfaces of the groove prevent the side surfaces of the groove from collapsing, and the plate-like members are buried to omit the backfilling work of the groove.

Further, it is possible to eliminate the work of placing concrete at the same time in the trench and in the dug portion between the trenches and separately placing concrete in the trench and the soil.

[0015]

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

As shown in FIG. 1, a groove 12 whose both side surfaces are parallel to each other from the ground surface 11 to the ground (the facing intervals of the respective parts are uniform).
Are drilled in parallel.

Further, the ground surface 11 between the two grooves 12 arranged in parallel.
To a predetermined depth, and a dug portion 13 is provided.

Next, the plate-shaped bodies 14 are superposed on both side surfaces of each groove 12, and the superposed state of the plate-shaped bodies 14 is maintained.

The upper edge of the plate-like member 14 superposed on the opposite side surfaces of the parallel grooves 12 is at the same level as the root cutting bottom of the dug portion 13, and is superposed on the opposite side surfaces of the parallel grooves 12. The upper edge of the combined plate-like bodies 14 is projected slightly above the ground 11. An iron plate, a hard synthetic resin plate, or the like is used for the plate-shaped body 14.

To maintain the stacked state of the plate-like bodies 14, as shown in FIG. 3, concrete is placed on the roots of the grooves 12 to form the base 15 and the base 15
The anchor bolt 16 of the above is passed through one side of the angle 17 placed on the base 15, and the anchor bolt 1
While screwing the nut 18 into 6, fix the angle 17 on the base 15, and fix the other side piece of the angle 17 and the groove 12
The lower edge of the plate-shaped body 14 is dropped between and supported on the side of
As shown in FIG. 2, the upper portion of the parallel plate-shaped body 14 abuts on the inner surface of the plate-shaped body 14 with the wooden contacts 20 which are previously screwed into both ends of the separator 19 and is inserted into the plate-shaped body 14 from the outside. Although the above is screwed into the wooden container 20 to maintain the facing distance, the facing distance of the plate-shaped body 14 may be maintained by a method other than the above.

Then, after reinforcing the reinforcing bars 22 in the respective grooves 12 in a mechanically required amount, concrete is simultaneously poured into the respective grooves 12 and the dug portion 13, as shown in FIG. An underground beam 23 and a soil floor 24 are provided.

[0022]

[Effect] According to the present invention, since the underground girder and the soil are constructed by the simultaneous pouring of concrete as described above, the construction period can be remarkably shortened and the construction cost can be reduced.

In addition, the trench for constructing the underground beam is excavated so that the side surfaces are parallel to each other, and the plate-like bodies superposed on both sides of the trench are buried, so that the trench is backfilled and the formwork is removed. This eliminates the need for work and solves the problem that the amount of soil carried out due to excavation of the inverted trapezoidal groove increases.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of the present invention.

FIG. 2 is an enlarged vertical cross-sectional front view showing maintaining the upper space of the plate-like bodies.

FIG. 3 is an enlarged vertical sectional front view showing the lower edge support of the plate-shaped body.

[Fig. 4] Front view in vertical section of underground beam and soil floor

FIG. 5 is a vertical sectional front view of a conventional example.

FIG. 6 is a vertical sectional front view of an underground beam and an earth floor.

[Explanation of symbols]

 11 Ground 12 Groove 13 Digging Part 14 Plate 15 Base 16 Anchor Bolt 17 Angle 18 Nut 19 Separator 20 Wood Con 21 Bolt 22 Reinforcing Bar 23 Underground Beam 24 Dirt

Claims (1)

[Claims] 1. Grooves having both sides parallel to each other from the ground to the ground are excavated in parallel, and the ground between the grooves is dug down to a predetermined depth, and then a plate-like body is formed on the side surface of each groove. While superposing, maintain the stacked state of the plate-like body by using an appropriate means, then, after reinforcing bars in each of the grooves, concrete in the dug portion in each of the grooves and between the grooves. A method of constructing a foundation characterized by casting.