JPH07103582B2 - Retaining wall construction method and retaining wall block - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall construction method and retaining wall block for river bank protection, residential land development, water storage dams, erosion control dams, and the like.

[0002]

2. Description of the Related Art Conventionally, there is a concrete block stacking method which does not require a work scaffold for assembling a mold and which eliminates the danger to the operator. It is a stack of a large number of legged blocks formed by projecting two legs behind a rectangular base in a zigzag manner, and the legs of the upper and lower legged blocks overlap each other, While configuring the front wall and the rear wall, while connecting the front wall and the rear wall by a suitable number of intermediate vertical walls configured by joining a large number of stacked tubular blocks with concrete,
A method for constructing a dam-shaped structure (see Japanese Patent Publication No. 56-11812) is known in which the remaining space between the front wall and the rear wall is filled with a filler made of poorly mixed concrete or crushed stone. ing.

[0003]

However, in the above-mentioned prior art, since the dam-shaped structure is constructed by the legged block and the tubular block, the legged block and the tubular block must be joined with concrete. In addition, there is a problem that it is necessary to have a complicated shape leg block, such as making a step on the front and rear of the base of the leg block, forming a flat surface and a tapered surface in order to easily stack them. However, there is a problem that the weight of one block to be handled is heavy. In view of these circumstances, the present invention solves the above-mentioned drawbacks of the prior art and divides the retaining wall block into a retaining wall block having a π-type vertical cross section and a retaining wall block having an I-type vertical cross section with a simple configuration. The retaining wall block with a vertical cross section of π type and the retaining wall block with an I vertical cross section are combined to reduce the handling weight. A retaining wall construction method for constructing a wall, and a retaining wall block having a π-type longitudinal section used in performing the retaining wall construction method, and a longitudinal section of I
An object of the present invention is to provide a retaining wall block which is a combination of two types of a retaining wall block of a mold.

[0004]

The present invention is intended to solve the above-mentioned problems, and employs the following technical means. The invention according to claim 1 is a method for constructing a retaining wall, in which a retaining wall block having a longitudinal section of π type and a retaining wall block having an I section of longitudinal section are combined, while filling and fixing the connection portion with fresh concrete,
We adopted the technical means of building a retaining wall by stacking them side by side vertically. Further, the invention according to claim 2 employs a technical means of connecting and combining the concavo-convex portions of the retaining wall block whose longitudinal section is π type and the retaining wall block whose longitudinal section is I type. The invention according to claim 3 employs a technical means called a retaining wall block according to claim 2 in which a packing member is provided on the upper and lower connecting portions of the retaining wall block having a longitudinal section of π type. Further, the invention according to claim 4 adopts a technical means called a retaining wall block according to claim 2 or claim 3, wherein a partitioning projection is provided in an intermediate portion of the retaining wall block having a vertical cross section of I type. .

[0005]

As a result of adopting the above technical means, the present invention has a simple structure, does not require on-site casting with a formwork, can be manufactured in a factory, and has a light weight of each block, so that a large heavy machine does not enter. Retaining walls can be constructed on-site, and the retaining wall block with an I-shaped vertical section can be made short and small as the earth pressure decreases toward the top, so costs can be reduced and high places can be used. The smaller the weight, the easier the work. Therefore, the work can be safely and easily proceeded without danger.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a plan view of a retaining wall in which a retaining wall block having a longitudinal section of π type and a retaining wall block having an I type longitudinal section are assembled in parallel in the first embodiment according to the present invention. FIG. 2 is a side view showing an embodiment in which a retaining wall block having a vertical cross section of I type is shortened toward the upper stage and stacked in a stepwise manner. As can be seen from what is shown in FIG. 1, as one embodiment, a retaining wall block 1 having a longitudinal section of π type is arranged at the front and the back, and a retaining wall block 2 having an I section of the longitudinal section is disposed at the left and right sides to make a vertical section. The concave portion 3 of the retaining wall block 1 whose surface is π type and the convex portion 4 of the retaining wall block 2 whose longitudinal section is I type are arranged so as to engage with each other, and are formed in the engaging portions of the concave portion 3 and the convex portion 4. Concrete is filled to form a retaining wall block, and the retaining wall blocks are stacked in parallel on the left, right, up and down to construct a retaining wall. Further, in consideration of strength, a protrusion 5 is formed in the middle of a retaining wall block having an I-shaped vertical cross section, and a partition plate 6 is used for partitioning using the protrusion 5. , Fill each with fresh concrete and earth and sand if necessary. As can be seen from FIG. 2, as the earth pressure decreases toward the upper portion, the retaining wall block 2 having a vertical cross section of I type is shortened toward the upper portion so that the retaining wall block 2 has a stepped shape as illustrated. It will be piled up in. This is to first pour the foundation concrete 10 in-situ after excavating the ground to an appropriate depth at a place where a retaining wall such as a dam should be first constructed. Then, the required height and length are stacked on the basic concrete 10. In order to stack the appropriate number of steps (8 steps in this embodiment) corresponding to the required height and length, first, the retaining wall block 2 having the I-shaped vertical section with the largest depth dimension and the π-type vertical section. In combination with the retaining wall block 1, the concave portions 3 and the convex portions 4 are engaged to fill fresh concrete to form a retaining wall block, which is vertically and horizontally stacked and arranged. Next, the retaining wall block 2 having an I-shaped vertical section with the depth dimension sequentially shortened.
And a retaining wall block 1 having a longitudinal section of π type, the retaining wall blocks 1 are stacked in an appropriate number of steps, and are parallelly connected and similarly fixed. Finally, the uppermost stage is constructed. This is a retaining wall block 2 with the shortest vertical dimension and the I-shaped vertical section.
In the same manner, the retaining wall blocks formed by the retaining wall block 1 having a longitudinal section of π type are similarly stacked in an appropriate number of steps, and are connected and fixed in parallel to construct the retaining wall of the dam. When stacking, stack directly so that the inside (mountain side) is vertical. Therefore, the outside is stepped. By constructing in this way, when the amount of excavation is the same, the amount of backfilling is smaller and the construction cost is lower as compared with the conventional method in which the inside (mountain side) is stepped. For this reason, as shown in the figure, it is stepped from the lower side to the upper side. Therefore, since the work can be performed firmly and using the stepped portion, the work can be performed extremely safely, and the retaining wall block having a smaller depth can be used toward the upper portion. The cost can be reduced. Further, as shown in FIG. 3, when the retaining wall blocks are arranged side by side, packing 7 may be provided at a connecting and engaging portion of the retaining wall block 1 having a longitudinal section of π type.
As shown in FIG. 5, the stepped portion 8 is symmetrically formed so that the stepped portion 8 can also be engaged for positioning. The above has described the case where the retaining wall is constructed linearly, but the case where the curve is applied will be described based on FIG. The concave portion 3 of the retaining wall block 1 having a longitudinal section of π type and the convex portion 4 of the retaining wall block 2 having a longitudinal section of I type are arranged so that the engagement is shifted so as to be bent little by little. The gap between the concave portion 3 and the convex portion 4 is filled with fresh concrete for construction. In addition,
The retaining wall is constructed as described above, but the left and right ends are not the retaining wall block 2 having a vertical cross section of I-shaped as shown in FIG. It is necessary to make the retaining wall block 9 whose longitudinal section is substantially E-shaped. Needless to say, a water collecting pipe, a drain port, etc. are provided. As mentioned above, the ones having specific shapes such as π type and I type have been described. It goes without saying that various modified shapes can be adopted without being limited to the above. Only,
It goes without saying that it is possible to divide it to make it lightweight and easy to handle.

[0007]

As a result of adopting the above configuration, the present invention provides
The following effects can be obtained. (1) Except for foundation concrete, there is no need for in-situ casting, and blocks for retaining walls can be produced at the factory, and further divided into a retaining wall block with a vertical cross section of π and a retaining wall block with an I vertical cross section. Since the weight has been lightened, it is also suitable for sites where large heavy equipment is not available. (2) Since the outer side is stepped, it is possible to plant by utilizing the opening width of the front side, and the backfill amount is small for the same excavation amount. (3) The depth dimension becomes smaller as it goes up in the vertical direction, so that a stepped portion is formed as a result, and the work can be safely carried out using this stepped portion. . (4) As the load of earth pressure is reduced, the depth of the retaining wall block having an I-shaped vertical cross section is made shorter, so that the cost can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing a retaining wall according to a first embodiment of the present invention.

FIG. 2 is a schematic side view showing a state in which the retaining wall blocks of the above embodiment are stacked to form a retaining wall.

FIG. 3 is an enlarged partial detailed view of a connecting portion of a retaining wall block having a π type longitudinal section in the embodiment.

FIG. 4 is an enlarged partial detail view showing another embodiment of the connecting portion of the retaining wall block having a longitudinal section of π type in the above embodiment.

FIG. 5 is a plan view showing a retaining wall forming a curve which is another embodiment of the present invention.

[Explanation of symbols]

1 ... Retaining wall block with vertical cross section of π type 2 ... Retaining wall block with vertical cross section of I type 3 ... Recessed section 4 ... Convex section 5 ... Projection section 6 ... Partition plate 7 ... Packing 8 ... Step 9 ... Retaining wall block with vertical cross section of approximately E type 10 ... Basic concrete

Claims (4)

[Claims] 1. A retaining wall block having a longitudinal section of π type and a retaining wall block having an I section of longitudinal section are combined, and while the concrete is filled and fixed in the connecting portion, the retaining wall is stacked vertically and horizontally to form a retaining wall. Retaining wall construction method characterized by building. 2. A retaining wall block comprising a retaining wall block having a π-type vertical section and a retaining wall block having an I-type vertical section, which are connected and combined with each other. 3. The retaining wall block according to claim 2, wherein a packing member is provided at the upper and lower connecting portions of the retaining wall block having a π type longitudinal section. 4. The retaining wall block according to claim 2 or 3, wherein a partitioning protrusion is provided at an intermediate portion of the retaining wall block having an I-shaped vertical section.