JPH11303105A - Foundation retaining wall block of leaning type retaining wall and foundation structure using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foundation retaining wall block and the foundation structure using the block capable of constructing it easier than the conventional construction work of the foundation in the state that the stability of the leaning type retaining wall is maintained more stable than the conventional one, so that various expenses can be reduced. SOLUTION: A foundation retaining wall block is a precast concrete block of a box frame construction to be used for the foundation when a leaning type retaining wall is formed. In the upper side 1c and the lower side 1d existing above and below between nearly parallel front and rear walls, the upper side 1c is at right angles both to the front surface and to the rear surface, and the angle α that the front wall 1a makes with the lower side 1d equals to the inclined angle γ of the leaning type retaining wall, and the angle βthat the lower side 1d makes with the rear wall 1b is made equal to the angle subtracted the inclined angle γ of the retaining wall from 180 deg..

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base retaining wall block used for forming a leaning type (inclined) retaining wall and a basic structure using the same.

[0002]

2. Description of the Related Art A leaning type retaining wall is a retaining wall which secures stability by applying earth pressure on the back (slope side) to the load of an obliquely provided retaining wall. An example of the basic structure of the leaning retaining wall is shown in FIG. 6. The lowermost rectangular base retaining wall block 10 has a heavy foundation block 11 having an inclined receiving surface 11 a or a similar heavy structure. The structure was received by cast-in-place concrete. Lower side of base retaining wall block 10
Since the angles α and β between the front wall 10b and the front wall 10b and the rear wall 10c are 90 °, the rear wall 10c side is deeply buried. With such a structure, the excavation volume for burying the foundation block 11 (about 1 m depth and about 2 m width or more) is large, and it is almost always formed by cast-in-place, so workability is poor. Above, there was a drawback that the formation cost of the basic block 11, the transportation cost of raw materials, the equipment cost of equipment used on site, and the like were high.

[0003]

DISCLOSURE OF THE INVENTION The present invention provides a base retaining wall block which can simplify the construction of a conventional foundation and can reduce various costs while maintaining the stability of a leaning retaining wall more than before. And the basic structure using it.

[0004]

As a result of studying the above problems, a precast concrete block having a box frame structure used as a foundation for forming a leaning retaining wall, comprising a front wall and a rear wall which are substantially parallel to each other. The upper side and the lower side that exist above and below between, the upper side makes a right angle to both the front and the rear,
The lower side has an angle α with the front wall equal to the inclination angle γ of the leaning-type retaining wall, and the angle β between the lower side and the rear wall is formed at an angle obtained by subtracting the inclination angle γ of the retaining wall from 180 °. It is a base retaining wall block of the type retaining wall.

Further, when forming the leaning type retaining wall, the foundation portion is slightly excavated and concrete is poured into the excavated portion to form a horizontal and thin base, or the excavated portion is formed of a thin base block. And the base retaining wall block is disposed on the upper part of the base structure, thereby providing a basic structure of a leaning retaining wall.

[0006]

FIG. 1 is a side view of a foundation structure using a base retaining wall block of a leaning retaining wall according to the present invention.
Is a perspective view. As shown in FIG. 1, the base retaining wall block 1 of the precast concrete block of the present invention has a box frame structure used for the foundation of the leaning retaining wall. The inside can be filled with concrete or earth and sand. The base retaining wall block 1 comprises a front wall 1a and a rear wall which are substantially parallel.
An upper side 1c and a lower side 1d which are present above and below between the upper side 1b and the upper side 1c are at right angles (90 °) to both the front surface 1a and the rear surface 1b. Bottom
In 1d, the angle α formed with the front wall is equal to the inclination angle γ of the leaning retaining wall, and the angle β formed with the rear wall of the lower side is formed by subtracting the inclination angle γ of the retaining wall from 180 °.

Due to such a structure, the foundation of the retaining wall is slightly excavated and concrete is poured into the excavation to form a horizontal thin base, or as shown in FIGS. A strong foundation structure can be obtained simply by laying a thin base block 2 in such an excavated portion and casting concrete inside the base retaining wall block 1 or between the blocks. Conventionally known retaining wall blocks 3 can be sequentially stacked on the base retaining wall block 1. The retaining wall block 3 can pile up a large number of blocks whose upper side 1c and lower side 1d are substantially parallel to each other up to the upper tier, and becomes a leaning retaining wall having a basic structure using the base retaining wall block of the present invention. A horizontal force due to the component force of earth pressure is also applied to the leaning retaining wall, but the foundation of the retaining wall is slightly excavated and concrete is poured into the excavated part to form a horizontal thin base, or The movement can be sufficiently prevented by laying the thin base plate 2 on the excavated portion as shown in FIGS. This is because, as shown in FIG. 3, the earth pressure W is converted into a direction of rotation by the toe a of the retaining wall more than a component force in a direction of moving the retaining wall. Therefore, when the base retaining wall block of the present invention is used, it is sufficient to cast concrete in the excavation part to form a horizontal thin base or to lay the thin base block 2 in the excavation part 5. .
A non-slip projection 4 is provided at the tip of the base block 2.

[0008] In the example shown in FIGS.
Although a non-slip projection 4 is provided at the end of the base block 2, as shown in FIG. There is no problem if it is made firmly by fitting surfaces.

FIG. 5 shows a basic structure using the base retaining wall block 1 of the present invention. Even the base retaining wall block 1 has upper and lower sides between the front wall 1a and the rear wall 1b which are substantially parallel to each other.
1c and the lower side 1d, the upper side 1c is at right angles to both the front surface 1a and the rear surface 1b, the angle α between the lower side 1d and the front wall is equal to the inclination angle γ of the leaning retaining wall, and the lower side rear wall Angle 180
The angle is formed by subtracting the inclination angle γ of the retaining wall from ° (not shown in the figure, see FIGS. 1 and 2). In this example, the base retaining wall block 1 is filled with earth and sand on a base concrete 8 formed by digging shallowly and casting concrete thinly, and the space between the base retaining wall block 1 and the adjacent base retaining wall block 1 is filled. And concrete 7 is poured. Various conventionally known retaining wall blocks can be sequentially stacked on the base retaining wall block 1.

[0010]

According to the present invention, a base retaining wall block and its use that are simpler than conventional foundations and can reduce various costs while maintaining the stability of the leaning retaining wall more than before are used. The basic structure can be provided.

[Brief description of the drawings]

FIG. 1 is a side view of a foundation structure using a base retaining wall block of a leaning retaining wall according to the present invention.

FIG. 2 is a perspective view of the same basic structure.

FIG. 3 is a view showing a load action by backfill soil of a general leaning type retaining wall.

FIG. 4 is a side view of a foundation structure using a base retaining wall block of a leaning retaining wall according to another embodiment of the present invention.

FIG. 5 is a perspective view showing another example of the basic structure using the base retaining wall block of the leaning retaining wall of the present invention.

FIG. 6 is a side view of a basic structure of a leaning retaining wall using a conventional retaining wall block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base retaining wall block 1a Front wall 1b Rear wall 1c Upper side 1d Lower side 2 Base block 3 Retaining wall block 4 Non-slip projection 5 Excavation part 6 Reinforcement 7 Casting concrete 8 Base concrete

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Takashi Nakamoto 8-6 Nakamachi, Naka-ku, Hiroshima City, Hiroshima Prefecture Inside Fujita Hiroshima Branch (72) Inventor Shoichi Morita 8-6 Nakamachi, Naka-ku, Hiroshima City, Hiroshima Prefecture No. Fujita Hiroshima Branch Co., Ltd. (72) Inventor Yoji Ikeda 8-6 Nakamachi, Naka-ku, Hiroshima City, Hiroshima Prefecture Inside Fujita Hiroshima Branch (72) Inventor Toshinori Goto 8-6 Nakamachi, Naka-ku, Hiroshima City, Hiroshima Prefecture Shares Fujita Hiroshima Branch (72) Inventor Shigemi Sugiuchi 8-6 Nakamachi, Naka-ku, Hiroshima City, Hiroshima Prefecture Fujita Hiroshima Branch Office (72) Mitsuo Ueda 2-6-31 Hikari-cho, Higashi-ku, Hiroshima Hiroshima Prefecture Within Far East Kogyo Co., Ltd. (72) Inventor Takeshi Kobayakawa 2-6-31 Hikarimachi, Higashi-ku, Hiroshima City, Hiroshima Prefecture Within Far East Kogyo Co., Ltd. If the town Oaza Kaida 630 Address 1 Landes within Co., Ltd.

Claims (2)

[Claims] 1. A precast concrete block having a box frame structure used as a foundation when forming a leaning retaining wall, wherein upper and lower sides which are present above and below a substantially parallel front wall and a rear wall, The upper side makes a right angle to both the front and the rear, and the lower side makes an angle α with the front wall equal to the inclination angle γ of the leaning retaining wall, and the angle β with the rear wall of the lower side from 180 ° to the retaining wall The base retaining wall block of the leaning retaining wall formed at an angle obtained by subtracting the inclination angle γ of the base. 2. When forming a leaning retaining wall, a foundation part is slightly excavated and concrete is poured into the excavation part to form a horizontal and thin base, or a thin base block is formed in the excavation part. A base structure for a leaning-type retaining wall, wherein a base retaining wall block according to claim 1 is disposed on an upper portion thereof.