JPH0156213B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a method of constructing a retaining wall using concrete blocks for civil engineering.

Conventional technology Conventionally, when constructing retaining walls using civil engineering concrete blocks on the coast, riverbanks, or in residential development, the walls are piled up at an appropriate angle from the foundation to withstand earthquakes, vibrations, floods, etc. It is designed.

Problems to be Solved by the Invention However, when a retaining wall is tilted, the top surface of the retaining wall tends to become narrow. A construction method has also been developed in which blocks are stacked vertically from the foundation, vertical reinforcing bars are inserted into holes that communicate with the foundation, and the concrete is filled and integrated. It was easy for problems to occur.

Means for Solving the Problems In order to solve these problems, the present invention provides a method for stacking concrete blocks for civil engineering vertically on a basic concrete plate or the top surface of a concrete foundation, and connecting the holes provided in each concrete block with the top and bottom. and protrude the PC steel rod upward from the foundation.
This is a stacked block construction method in which a PC steel bar is secured to a bearing plate at the upper end with a nut, and concrete or grout is poured inside to firmly integrate the foundation and block.

Hereinafter, the structure of the present invention will be explained with reference to the drawings showing examples of the present invention.

One or two retaining parts 2 are protruded from the back of the main body 1 at the same height as the main body 1, and a hole 3a that communicates with the upper and lower parts is bored in the center of the main body 1, and a position near the tip of the retaining parts 2 is formed. A large number of concrete blocks 5 are formed by drilling holes 3b in the same manner and having semicircular longitudinal grooves 4a and 4b on both sides of the main body 1, and then forming a concrete foundation cast on site, or a reinforced concrete board or a PC board 6. A large number of front PC steel bars 7a are erected at positions near the front of the main body 1 with gaps that fit into the holes 3a of the main body 1 and the vertical grooves 4a, 4b on both sides, and at the rear of the front PC steel bars 7a. Hole 3 in retaining part 2 of each block
A large number of rear PC steel rods 7b that fit into the concrete block 5 are installed in the center hole 3a of the main body 1 of the concrete block 5 and in the vertical grooves 4a and 4b on both sides of the main body 1.
The concrete blocks 5 are vertically stacked and fixed in any number of stages while passing the steel rod 7a through the hole 3b of the retaining part 2, and the rear PC steel rod 7b is passing through the hole 3b of the retaining part 2. Inside, a sheath tube 8 of an appropriate diameter is attached to the front and rear PC steel rods 7a and 7b.
The holes are filled with concrete 9 on the outside of the sheath cylinder 8, and a rubber plate 10 and a bearing plate 11 are placed on the top surface of each hole in the second concrete block 5 from the top, and the PC is inserted through the center hole. The steel rod 7 is made to protrude, a nut 12 is screwed into the threaded part provided on the protrusion, the concrete block 5 is pressurized by the bearing plate 11, and the ground hole provided in the bearing plate 11 and the rubber plate 10 is inserted into the sheath cylinder 8. Concrete milk 14 is injected through hole 13, and concrete block 5' is mounted and fixed on the uppermost stage to form holes 3a, 3b,
This is done to fill the vertical grooves 4a, 4b with concrete 9.

Functions and Effects Next, the functions and effects of the present invention will be explained with reference to practical example figures.

In the construction method of the present invention, reinforced concrete is cast on-site as a foundation, or reinforced concrete plates or PC boards 6 are laid in series, and front and rear PC steel bars 7a and 7b are integrally protruded from the foundation. Then, the concrete blocks 5 are successively installed in the left and right direction while being stacked and fixed vertically in the up and down direction. Then, the center and both sides of the main body 1 of each concrete block 5, and the retaining part 2
The sheath tube 8 is inserted into the PC steel rods 7a and 7b in the hole that communicates vertically with the tip of the sheath tube 8.
Fill the outside with concrete 9 and let it solidify, and when the compressive strength of the concrete 9 reaches 350 kg/cm ² or more, prestress is introduced by locking the PC steel bars 7a and 7b with the bearing plates 11 and nuts 12. Due to the introduction of prestress by the PC steel bars, the stress on the vertical walls of the concrete block 5 becomes large, the bending moment is also large, and debris flows,
It has sufficient strength and stability against disasters such as landslides or earthquakes. In addition, since it is a vertical wall, the upper area can be expanded, and even inexperienced workers can easily construct it, reducing construction costs and creating a highly durable and aesthetically pleasing retaining wall. The above-mentioned remarkable effects can be achieved.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view of a retaining wall showing the implementation of the method of the present invention, Fig. 2 is a partially enlarged longitudinal sectional view thereof, Fig. 3 is a plan view thereof, Fig. 4 is a front view of a concrete block, and Fig. 4 is a front view of a concrete block. FIG. 5 is a plan view thereof, FIG. 6 is a right side view thereof, FIG. 7 is a right side view of the uppermost concrete block, and FIG. 8 is a perspective view showing the state in which the concrete blocks are stacked. 1... Main body, 2... Retaining part, 3a, 3b... Hole,
5... Concrete block, 6... Concrete plate, 7a... Front PC steel bar, 7b... Rear PC steel bar, 8... Sheath cylinder, 9... Concrete, 10
...Rubber plate, 11...Bearing plate, 12...Nut,
13... Groud hole, 14... Concrete milk.

Claims (1)

[Claims] 1. A retaining part of the same height is protruded from the main body to the back side, and a concrete block is formed with holes communicating with the upper and lower surfaces of the main body and the retaining part, and it is constructed from a cast-in-place concrete foundation, reinforced concrete board, or PC board. A PC steel rod is provided protrudingly, and concrete blocks are stacked and fixed vertically while passing the PC steel rod through the hole in the block, and a sheath cylinder of an appropriate diameter is inserted into the PC steel rod in the hole of the block that communicates with the top and bottom. Fill the outside of the PC steel bar with concrete, place a rubber plate and a bearing plate on the top surface of each hole in the second concrete block from the top, and make the PC steel bar protrude from the center. Screw a nut into the protruding part, pressurize the concrete block with a pressure plate, inject concrete milk into the sheath cylinder through the holes made in the pressure plate and the rubber plate, and place the concrete block on the top layer to connect the top and bottom. A method of constructing a retaining wall characterized by filling the holes with concrete.