JPS6053130B2 - Stepped revetment method and revetment blocks - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a step-type bank protection construction method, in which the upper surface is formed into an inclined surface with a gentler slope than the lower bottom inclined surface, and a ground plane is formed on the lower bottom surface of the rectangular main plate having a through hole. A standing leg is provided protrudingly parallel to the lower bottom surface, and corner cut portions are provided at both corners of the front part of the main plate, and a recessed portion is provided at the center of the rear end surface, and the main plate is provided with a cutout portion and a recessed portion in the center of the rear end surface. Precast revetment blocks each having a lifting reinforcing bar protruding from each cut are placed on the slope of the coastline, and the main plates of the horizontally adjacent blocks in each stage are brought into contact with each other, and the front end of the contact portion is The blocks are stacked so that both corner cut portions match the recessed portions of the rear end faces of the lower blocks, filling material is loaded into the through holes of each block, and both of the adjacent upper blocks are stacked. It is characterized by pouring connecting concrete into the space formed between each corner cut and the recessed part of the rear end face of the lower block, and its purpose is to provide easy construction. The object of the present invention is to provide an improved construction method that allows construction of a structurally rational stepped seawall.

In the present invention, as mentioned above, the step-type revetment is constructed using plexistone concrete blocks, so there is no need for complicated formwork as in the case of the cast-in-place construction method, and the construction is extremely simple. Become.

In addition, in the present invention, since the through hole drilled in the main plate of the block placed on the slope of the coastline is filled with filling material, the filling material can be changed freely according to the site conditions. For example, on a coastline with rough waves, it can be filled with concrete, and on a coastline with weak waves, it can be filled with chestnut stone or sand, making it possible to carry out economical construction that suits the site conditions.

Further, in the present invention, the upper surface of the main plate of the block is formed into an inclined surface having a gentler slope than the lower bottom inclined surface, and a support leg is provided protruding from the lower bottom surface, the grounding surface of which is substantially parallel to the lower bottom surface. Therefore, when the above blocks are placed on a coastal slope,
Even if the slope becomes quite steep, the upper surface of the main block of the block forming the stair tread is sloped to the extent that it can function as a staircase, so the block can be used on a coast with a considerable slope. It can be applied to sloped surfaces.

Furthermore, in the present invention, corner cut portions are provided at both corners of the front end of the main plate of the block, and a recessed portion is cut out at the center of the rear end surface, and the recessed portion and each of the corner cut portions are provided. A lifting reinforcing bar is protruding from each of the blocks, and when the blocks are stacked on a sloped coastline, the sides of the main plates of the horizontally adjacent blocks at each stage collide, and the collision part of the blocks collides with each other. Both opposing corner cut portions of the front end should match the recessed portion in the center of the rear end face of the lower block, and connecting concrete should be placed in the space formed between the recessed portion and both corner cut portions. The lifting reinforcing bars protruding from each part serve as connecting reinforcing bars, and the three blocks meeting at one point are integrally connected via the reinforcing bars.

Thus, according to the present invention, each block arranged on the slope of the coastline acts as an integral structure, which prevents uneven subsidence due to suction and strongly resists the uplift force of waves.
A highly reliable stepped seawall will be constructed. The present invention also provides a support leg whose ground surface is approximately parallel to the lower base surface, protruding from the lower base surface of the rectangular main plate whose upper surface is formed into an inclined surface with a gentler slope than the lower bottom slope surface and which has a through hole, Corner cut Σ parts are cut out at both corners of the front part of the main plate, and a recessed part is cut out at the center of the rear end surface, and lifting reinforcing bars are provided protruding from the recessed part and each of the corner cut parts, respectively. The present invention relates to a revetment block characterized by the following: the revetment block enables the aforementioned construction method to be carried out smoothly.

4 Below, the present invention will be explained with reference to the illustrated embodiments. A is a precast concrete revetment block, the upper surface of which is formed on a slope with a gentler slope than the lower bottom slope, and the ground plane is on the lower bottom surface of the rectangular main block 2 which has a pair of through holes 1 on the left and right sides, and the ground plane is approximately the same as the lower bottom surface. Parallel supporting legs 3 are provided protrudingly, and a recessed notch 4 is cut out on the lower surface of the supporting legs 3. Corner cut portions 5 are cut out at both front corner portions of the main plate 2, and lifting reinforcing bars 6 are protruded from the cut portions. Further, a recessed portion 7 is cut out in the center of the rear end surface of the main plate 2, and a lifting reinforcing bar 8 is provided protruding from the recessed portion 7. Furthermore, an overhanging portion 9 is provided protruding rearward from the middle of the rear end surface of the main plate 2, and the front end of the main plate 2 of the upper block A is mounted on the projecting portion 9. In the present invention, a chestnut stone C is laid on a slope B of the coastline, and the blocks A are placed on top of the chestnut stone C so that the sides of the main plates 2 of horizontally adjacent blocks A in each stage collide with each other, and The front end of the main plate 2 rests on the overhanging part 9 of each lower gate block A, and the front ends of the contact parts of both main plates 2 are aligned with the recessed part 7 in the center of the rear end face of the lower block A. The through holes 1 of the main block 2 in each block A are filled with filling material D, and the filling material D is filled between the bottom surface of each block A and the chestnut stone C. The block A is installed in a stable state on the inclined surface B, and the corner cut portions 5 of the horizontally adjacent blocks A and A are
. Coupled with the presence of the protruding lifting reinforcing bars 6, 6, and 8, each of the concrete blocks is integrally connected, and the entire structure is constructed as a single piece, preventing uneven settlement and strongly resisting the uplift force of waves. This is to construct a resistive stepped block revetment.

In the figure, numerals 10 and 11 are the crown concrete and the foundation concrete, respectively.

When filling the through hole 1 with the filling material D, concrete is filled in areas with rough waves, and chestnut stone and sand are filled in areas with weak waves to perform economical construction that is adapted to the site conditions. It is.

Although the present invention has been described above with reference to embodiments, the present invention is, of course, not limited to such embodiments, and can be modified in various ways without departing from the spirit of the present invention.

[Brief explanation of the drawing]

Fig. 1 is a slope view of a stepped revetment constructed by the method of the present invention, Fig. 2 is a slope view of a revetment block used in the method of the present invention, Fig. 3 is its front view, and Fig. 4 5 is its rear view, FIG. 5 is its top view, FIG. 6 is its bottom view, and FIG. 7 is its side view. A: Precast concrete revetment block, B: Coastline slope, D: Filling material, E: Bonded concrete, 1: Through hole, 2... Main plate, 3... Support leg, 5...
...Corner cut section, 6...Hoisting reinforcing bar, 7...
- Recessed part, 8... Lifting reinforcing bar.

Claims (1)

[Scope of Claims] 1. A support leg whose ground plane is approximately parallel to the lower base surface is protruded from the lower base surface of the rectangular main plate whose upper surface is formed into an inclined surface with a gentler slope than the lower bottom slope surface and which has a through hole. A cutout part is cut out at both corners of the front part of the main plate, and a recessed part is cut out at the center of the rear end surface, and lifting reinforcing bars are cut out in the recessed part and each corner cutout respectively. A protruding precast revetment block is placed on the slope of the coastline, and the main plates of the horizontally adjacent blocks in each stage collide with each other, and both corner cut parts at the front end of the colliding part are attached to the lower stage of the blocks. The blocks are stacked so as to match the concave portions on the rear end faces of the blocks, filling material is loaded into the through holes of each block, and the corner cut portions of both adjacent blocks in the upper row and the recesses in the lower row are stacked. A step-type revetment construction method characterized by placing connecting concrete in the space formed between the block and the concave part on the rear end face. 2. A support leg whose ground surface is approximately parallel to the lower base surface is protruded from the lower base surface of the rectangular main plate whose upper surface is formed into an inclined surface with a gentler slope than the lower bottom slope surface and which has a through hole, and the main plate Corner cut portions are cut out at both corners of the front side, and a recessed portion is cut out at the center of the rear end surface, and lifting reinforcing bars are provided protruding from the recessed portions and each of the corner cut portions, respectively. A seawall block featuring: