JP3171716B2 - Foundation construction method on inclined surface - Google Patents

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 foundation for constructing a building on an inclined surface.

[0002]

2. Description of the Related Art Generally, when constructing a building on an inclined surface, the construction is carried out by a method as shown in FIGS.
That is, when constructing a building 21 on the inclined surface 20 as shown in FIG. 4, first, as shown in FIG. prevent. As shown in FIG. 6, when the building 21 is constructed, the valley 22 is removed. At this time, the stakes 24 are hit and the building 21 is constructed on the basis of the stakes.

[0003]

In the above-mentioned conventional method, an earth anchor is indispensable. However, if the ground is particularly soft, it may not be able to be driven. In addition, sloping land generally has a high possibility of spring water, and construction of earth anchors and removal of mountain retaining parts involves danger, and sufficient safety may not be ensured in some cases.

Further, in the conventional method, since the mountain retaining is a temporary one, it is essential to remove and refill the retaining, but in general, these steps become critical paths for the entire construction and determine the construction period. It is desired to shorten the construction period in these steps.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a foundation construction method capable of efficiently and safely performing a mountain retaining and foundation construction on an inclined surface.

[0006]

Means for Solving the Problems In order to solve the above-mentioned technical problems, the present invention employs the following method for constructing a foundation portion when constructing a building on an inclined surface.

[0007] (1) A large number of perforations 1 are formed on a straight line substantially along the contour of the inclined surface. (2) The perforated portion 1 is made continuous to form a groove-like cavity, and concrete is cast into the cavity to form a continuous wall 2. (3) Similarly, the continuous wall 2 is formed at an appropriate position on the slope. (4) Subsequently, the flat portion 3 is formed by cutting the valley side of the continuous wall 2 located between the continuous walls 2 and 2 and on the valley side. (5) At the upper end of the connecting wall 2 protruding from the flat portion 3, a precast concrete beam 4 bridging between the connecting walls 2, 2 is fixed. (6) Pour foundation concrete 5 so as to cover the upper surfaces of the continuous wall 2 and the cross beam 4.

[0008]

According to the above-mentioned methods (1) to (3), even if the slope on which the building is to be constructed is soft ground or there is a layer with a spring, it can be safely used without using an earth anchor. A ridge consisting of the continuous wall 2 can be formed.

The connecting wall 2 serving as a ridge is not removed after the foundation is formed, but becomes a foundation pile as it is. Therefore, there is no need to perform the work of backfilling and removing the mountain retaining.
In addition, since the underground beams are formed by bridging the connecting walls 2 and 2 with the precast concrete cross beams 4 by the above method, the work of assembling and removing the concrete formwork is eliminated, and the foundation is constructed. The process is simplified.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. This embodiment forms the foundation for building construction on the inclined plane A. First, a large number of perforations 1 are formed by a single-axis auger excavator on a straight line substantially along the contour line of the inclined surface A. In this case the diameter of the hole and two stages, so as drive the steel 2 a to small Keiana portion as shown in FIG.

Then, the earth and sand between the large number of perforated portions 1 is removed and connected to form a groove-shaped cavity. Soil cement flows into this hollow portion to form a continuous wall 2. As another method for forming the continuous wall 2, at the time when the perforated portion 1 is formed, a steel pipe to be fitted into the perforated portion 1 is driven in, soil cement flows into the steel pipe, and then the space between the perforated portions 1 is continued. Such an ONS method may be used.

In the same manner as described above, the continuous wall 2 is formed at an appropriate position on the mountain side or the valley side of the slope. As a result, the continuous wall 2 is arranged in a stepped manner. Subsequently, after the soil cement is sufficiently cured, the flat portion 3 is formed by cutting the valley side of the continuous wall 2 located between the continuous walls 2 and 2 and on the valley side. Here, each of the connecting walls 2, 2 functions as a retaining wall, and is formed by flowing concrete into the soil, so that it has good adhesion to the soil and does not require an earth anchor.

The connecting wall 2 is set so that its upper end protrudes from the leveled flat portion 3 by about several tens of centimeters. As shown in FIG. 3, the inside of each connecting wall 2 passes through the reinforcing bar 10 vertically and horizontally, but the upper end of each connecting wall 2 is
Is exposed from the top.

Subsequently, a connection gusset plate 6 is attached to the side surface of each connecting wall 2. This connection gusset plate 6
Is made of a rectangular iron plate, and is bolted so that both ends of the connection gusset plate 6 protrude from both side surfaces of each connecting wall 2. Bolt holes (not shown) are provided at portions protruding from both side surfaces of the continuous wall 2.

Thereafter, a cross beam 4 bridging between the connecting walls 2 and 2 is fixed at the upper end of the connecting wall 2. The cross beam 4 is made of precast concrete, and is formed in a predetermined shape in a factory or a work yard in advance. Perforations corresponding to the bolt holes of the connection gusset plate 6 are provided at both ends of the cross beam 4, and are fixed to the connection gusset plate 6 by bolts 7 as shown in FIG.

Then, a foundation concrete 5 is cast in place so as to cover the upper surfaces of the connecting wall 2 and the cross beam 4. At this time, the exposed reinforcing bar 10 is covered with the foundation concrete 5 and firmly fixed.

As described above, since the connecting wall 2 serves as both the stake and the foundation pile, it is not necessary to remove the stake as in the prior art. In addition, since an earth anchor is not required, a large labor saving can be achieved. Moreover, the connecting wall 2 is excellent in safety, and can work safely even under bad conditions.

In addition, since the connecting walls 2 and 2 are used as a foundation and the connecting walls 2 and 2 are bridged by the cross beams 4 made of precast concrete, the productivity is high and the construction period is greatly shortened. be able to.

[0019]

According to the present invention, it is possible to efficiently perform the mountain retaining and the foundation construction on the inclined surface, and to shorten the construction period.

Further, the continuous wall has a high strength and a high soil retaining ability even at a site where the soil is poor, and is safe.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an initial state of construction showing an embodiment of the present invention.

FIG. 2 is an overall sectional view showing one embodiment of the present invention.

FIG. 3 is a side view showing a connecting portion between a continuous wall and a beam according to an embodiment of the present invention.

FIG. 4 is a conceptual diagram showing a conventional method of building a foundation on an inclined surface.

FIG. 5 is a side view of the first half of construction showing a conventional method of building a foundation on a slope.

FIG. 6 is a side view of a later stage of construction showing a conventional method of building a foundation on a slope.

[Explanation of symbols]

 1. Perforated part, 2. Connected wall, 3. Plane part, 4. Cross beam, 5. Basic concrete.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) E02D 27/32 E02D 17/20 106

Claims (1)

(57) [Claims] 1. A method for constructing a foundation on an inclined surface when constructing a building, comprising: forming a large number of perforated portions on a straight line substantially along a contour line of the inclined surface; Into a grooved cavity,
Concrete is cast into this hollow portion to form a continuous wall, and similarly, the continuous wall is formed at an appropriate position on the slope, and subsequently, the valley side of the continuous wall located between each continuous wall and the valley side is cut. After fixing a horizontal beam made of precast concrete bridging between the continuous walls at the upper end of the continuous wall protruding from the flat portion, the foundation concrete is formed so as to cover the upper surfaces of the continuous wall and the horizontal beam. A method for constructing a foundation on an inclined surface, comprising: