JPH0535172Y2 - - Google Patents

Description

[Detailed explanation of the idea] (Industrial application field) The present invention relates to blocks for seawalls.

(Prior Art) As shown in FIGS. 13 and 14, a conventional bank protection block has leg pieces b extending in opposite diagonal directions at regular intervals along the longitudinal direction of a rectangular horizontal main rod a. The blocks were formed by protruding alternately, and the leg pieces of adjacent blocks for the seawall were laid in parallel so as to intersect with each other, so as to weaken the force of flowing water passing through the inside of the block.

(Problems to be solved by the invention) In the conventional bank revetment block, the horizontal main rod is formed with a rectangular cross section, and the strength and rigidity are insufficient, and the main rod is long, so the block breaks at the center. In many cases, the first
As shown in P in Figure 5, the back side is transparent, making it easy for water to enter, creating problems in terms of preventing earth and sand from washing away.Furthermore, leg piece b is dotted on the ground as shown in Q in Figure 14. Because of the contact, there was a problem that the blocks were prone to sinking.

(Means for solving the problem) The present invention relates to a bank protection block proposed to solve the above-mentioned problem. An overhanging wall piece extends in the vertical direction of the upper and lower flange portions of the main rod and toward one side of the web portion, and an overhanging wall piece extends in the vertical direction of the upper and lower flange portions and toward the other side of the web portion. The above-mentioned problem is solved by alternately protruding the overhanging wall pieces.

(Function) Since the bank protection block according to the present invention is constructed as described above, the lower surface of the overhanging wall pieces that are provided alternately protruding in opposite directions at regular intervals along the longitudinal direction from the horizontal main block. A large number of revetment blocks are laid in parallel so that the walls are grounded and the overhanging wall pieces of adjacent blocks are positioned in an alternately overhanging manner. This creates a crank-shaped flow that reduces the flow velocity and prevents sediment from being washed away.

At this time, the overhanging wall piece extends above and below the entire upper and lower flange portions of the horizontal main rod with an I-shaped cross section, and extends outward from the entire side surface of the web portion, so when viewed from the front,
Unlike in the past, there is no transparent part on the back of the block overhanging wall piece when viewed from the front, which reliably prevents soil from being washed away, and the entire lower end of the overhanging piece is in contact with the ground, so the block subsidence is prevented.

Furthermore, the horizontal main rod of the revetment block according to the present invention is formed with an I-shaped cross section, has a large section modulus, and exhibits sufficient resistance to loads from the top, eliminating the risk of breakage from the center as in the past. Less is.

(Example) The present invention will be described below with reference to the illustrated embodiments.

Reference numeral 1 denotes a horizontal main rod of a concrete block for seawall, which is formed into an I-shaped cross section. Overhanging wall molds 2 extending in the direction of The seawall block A is constructed as follows.

Since the illustrated embodiment is constructed as described above, as shown in FIGS. 6 to 9, the lower surfaces of the overhanging wall pieces 2 and 2' projecting left and right from the horizontal main rod 1 are laid down. A large number of blocks A are laid in parallel so that they are in contact with the ground and the overhanging wall pieces 2, 2' of adjacent blocks A are alternately overlapped in the front and back direction.

Therefore, the water flow passing through the inside of each block A becomes a crank-shaped flow as shown in FIG. 10, which reduces the flow velocity and prevents the outflow of earth and sand.

At this time, by adjusting the center distance d between the horizontally adjacent blocks A, the porosity of the blocks can be freely adjusted in response to the particle size of the soil whose washout is to be prevented. In addition, since the bank protection block A has a single unit shape and is long in the direction of water flow, it has good stability against the force of water flow.

Further, the overhanging wall pieces 2, 2' are provided so as to protrude in the vertical direction over the entire surface of the upper and lower flange portions of the horizontal main rod 1, and toward the exterior appearance over the entire surface of the side surface of the web portion. Since the entire lower surface of the wall pieces 2 and 2' is in contact with the ground, there is no risk of subsidence, and there is no part between the adjacent revetment blocks A and A that can be seen from the front like the conventional blocks. This will ensure that the earth and sand will not be washed away.

Furthermore, since the horizontal main rod 1 is formed to have an I-shaped cross section, it has high strength and rigidity, and has a high resistance to loads from above, so that the blocks for the revetment can be stacked in multiple layers. Overhanging wall pieces 2, 2'
Because they engage vertically, horizontally, and horizontally, the connectivity is high, and the safety of the block masonry structure for seawalls is improved.

When stacking blocks for a seawall in multiple layers, the protruding wall pieces of the upper block are reduced one by one as shown in Figures 11 and 12, thereby creating a stable front and rear layout. can do.

(Effect of the invention) As described above, in the revetment block according to the present invention, the horizontal main rod having an I-shaped cross section is provided at regular intervals along its length in the vertical direction from the vertical direction of the upper and lower flange portions of the main rod. an overhanging wall piece that extends in a direction and extends toward one side of the web portion; and an overhang wall piece that extends in a vertical direction from the vertical direction of the upper and lower flange portions and that extends toward the other side of the web portion; Since the overhanging wall pieces extending laterally are provided alternately,
When the above-mentioned blocks are laid in parallel so that the overhanging wall pieces of adjacent blocks interlock with each other, there is no visible part on the back of the overhanging wall pieces when viewed from the front as in the past, and it is ensured that the earth and sand will be washed away. In addition, since the overhanging wall piece is in contact with the ground on its entire lower surface, the block is prevented from sinking.

Furthermore, since the horizontal main rod is formed to have an I-shaped cross section with a large section modulus, it has a large resistance to loads from above, and the revetment blocks of the present invention can be stacked in multiple layers.

[Brief explanation of drawings]

Fig. 1 is a slope view showing one embodiment of a bank protection block according to the present invention, Fig. 2 is a plan view thereof, Fig. 3 is a side view thereof, and Figs. 4 and 5 are arrows shown in Fig. 3. 6 is a perspective view showing the state of use, FIG. 7 is a plan view, FIG. 8 is a front view, FIG. 9 is a side view, and FIG. 10 is a side view. 8, FIG. 11 and FIG. 12 are respectively perspective views showing other embodiments of the bank protection block according to the present invention, and FIG. 13 is a side view of the conventional bank protection block. , FIG. 14 is a front view thereof, and FIG. 15 is a front view showing its usage state. 1...Horizontal main rod, 2, 2'...Protruding wall pieces.

Claims (1)

[Scope of utility model registration request] At regular intervals along the longitudinal direction of the horizontal main rod with an I-shaped cross section, there are overhanging wall pieces extending in the vertical direction of the upper and lower flange portions of the main rod and toward one side of the web portion; 1. A block for a seawall, characterized in that overhanging wall pieces extending vertically from a flange portion and toward the other side of a web portion are alternately protruded.