JP3206884U - Seawall foundation block - Google Patents

Abstract

[PROBLEMS] Progress of deep digging that occurs at the bottom of the dike slope and its surroundings, even in the case of a large typhoon or torrential rain, even if an overflow phenomenon occurs where water enters the land side over the dike Providing a revetment foundation block that delays the length of time until the embankment breaks down. A revetment foundation block 1 is installed at a lower portion of a plurality of revetment blocks stacked along a slope of a dike to support a revetment block, and includes a front surface 1a, a rear surface 1b, an upper surface 1c, a lower surface 1d, It has side surfaces 1e and 1f and has a rectangular parallelepiped shape that is long to the left and right, and the upper surface of the rear surface 1b is a block receiving portion 11 against which the revetment block abuts. A recess 12 is provided in the block receiving portion 11, and the revetment block 12 A connecting hook 13 is provided to which the connecting hook is connected via a connecting metal fitting. [Selection] Figure 4

Description

  The present invention relates to a foundation block for revetment that is installed under a plurality of revetment blocks and supports revetment blocks when a plurality of revetment blocks are stacked and installed on a slope of a dike.

  The height of the embankment that is constructed along the river or coast and prevents the intrusion of river or sea water to the land is the height of the embankment, which is assumed to be in the case of a flood, plus a margin. In addition, in the case of the coast, it is set higher in consideration of safety than the planned high tide level assumed at the time of abnormal tide level plus the height considering the influence of waves. For this reason, as a rule, the overflow phenomenon that rivers and sea water overflows over the embankment and enters the land is overflowed.

FIG. 12 is an explanatory view showing a conventional revetment foundation block and the state of installation of the revetment block on the slope, FIG. 13 is an explanatory view of a conventional revetment foundation block, FIG. 13A is a side view, FIG. 13B is a rear perspective view, and FIG. 13C is a front perspective view.
In the dike, a plurality of revetment blocks are stacked and installed on the slope of the river side or the sea side and the land side in order to protect and reinforce the surface. When installing in a river, as shown in FIG. 12, a plurality of revetment foundation blocks 51 are installed in a left-right direction on a foundation 53 extending in the left-right direction, which is the direction in which the river flows. A plurality of revetment blocks 52 are stacked on the slope 51 in the left-right direction and the up-down direction.

  As shown in FIG. 13, the revetment foundation block 51 has a front surface 51a, a rear surface 51b, an upper surface 51c, a lower surface 51d, left and right side surfaces 51e, 51f, and has a rectangular parallelepiped shape that is long to the left and right. The upper side is cut obliquely to form a block receiving portion 54 against which the revetment block 52 abuts. Thereby, the foundation block 51 for revetment is installed in the lower part of the some revetment block 52 piled up along a slope, and comes to support the revetment block 52. FIG.

  The revetment block 52 has a square flat plate shape, and a plurality of protrusions are integrally provided on the upper surface, and connection hooks 55 are provided at the four corners, and the connection hooks 55 of adjacent revetment blocks 52 are connected to each other. They are connected via a metal fitting 56.

  By the way, due to climate change represented by global warming, in the event of a large typhoon or torrential rain, the water level rises and the water level rises, and the water passes over the embankment and becomes overflow water. The overflow phenomenon that intrudes into

  The overflow water over the embankment flows down the slope on the land side of the embankment so that the overflow water pressure is applied to the revetment foundation block 51 and the revetment block 52 installed on the land side of the embankment. Acts as a great force. In particular, the water pressure of the overflow water acts as a very large force on the revetment foundation block 51 installed at the bottom of the revetment block 52 and positioned at the bottom of the slope. For this reason, if it is impossible to withstand the large force caused by the overflow water pressure, the foundation block 51 for revetment and the surrounding area will be deeply excavated, the slope will start to collapse, and the river will overflow due to the break of the dike. , May cause serious damage to neighboring areas.

  The present invention has been made to solve such problems, and its purpose is to intrude into the land side by overflowing water over the embankment in the event of a large typhoon or heavy rain. Even if an overtopping phenomenon occurs, it is possible to delay the progress of deep digging that occurs at the bottom of the revetment foundation block located in the bottom of the dike slope and to extend the time until the dike breaks down is there.

  The present invention is a foundation block for revetment that supports a revetment block by installing it at the bottom of a plurality of revetment blocks stacked along the slope of a dike, and has a front surface, a rear surface, an upper surface, a lower surface, and left and right side surfaces. For the whole to be a rectangular parallelepiped shape that is long to the left and right, and the upper side of the rear surface to be a block receiving part where the revetment block abuts, a recess is provided in the block receiving part, and the recessed part is connected to the connecting hook of the revetment block via a connecting bracket Has a hook.

  According to the present invention, when building the revetment foundation block and the revetment block on the slope of the dike, the revetment foundation block connection hook and the revetment block connection hook are connected via a connection fitting. By doing so, the foundation block for revetment and the revetment block on it can be firmly connected. Due to this, even if a large typhoon or a heavy rain hits, an overflow phenomenon occurs, and a large force due to the pressure of the overflow water acts on the revetment foundation block located at the bottom of the dike slope and its surroundings, It is possible to delay the progress of deep digging that occurs in and around the revetment foundation block, and extend the time until the embankment breaks down.

It is explanatory drawing which shows the installation state to the slope of the dike of the foundation block for revetment of this invention. It is a perspective view which shows the installation state to the slope of the dike of the foundation block for revetment of this invention. It is explanatory drawing of the foundation block for revetment of this invention. It is explanatory drawing of the foundation block for revetment of this invention. It is explanatory drawing of a revetment block. It is explanatory drawing which shows the installation process of the foundation block for revetment and a revetment block. It is explanatory drawing which shows the installation process of the foundation block for revetment and a revetment block. It is explanatory drawing which shows the installation process of the foundation block for revetment and a revetment block. It is explanatory drawing which shows a connection metal fitting. It is explanatory drawing which shows the use condition of a coupling metal fitting. It is explanatory drawing which shows the use condition of a connection metal fitting. It is explanatory drawing which shows the installation state to the slope of the embankment of the conventional foundation block for revetment and a revetment block. It is a perspective view of the conventional foundation block for revetment.

An embodiment of a foundation block for revetment according to the present invention will be described with reference to the drawings.
FIG. 1 is an explanatory view showing a state of installation of a revetment foundation block according to the present embodiment on a dike slope, and FIG. 2 is a perspective view showing a state of installation of the revetment foundation block on a dike slope. FIG.

  As shown in FIGS. 1 and 2, the revetment foundation block 1 is composed of a plurality of revetment blocks 2 stacked along a slope on a river side or a sea side and a land side in a dike such as a river or a coast. It is installed at the bottom to support the revetment block 2. The revetment foundation block 1 and the revetment block 2 of this embodiment are installed on the slope of the land side of the river bank. However, the installation location is not limited to this, and it may be installed on the river side slope of the river dike, or on the sea side slope or land side slope of the coastal dike.

The revetment foundation block 1 is installed at the lowest part of the dike slope so as to be lined up in the left-right direction on a foundation 3 extending left and right made by placing concrete.
In addition, the left-right direction here is a direction through which river water flows.

FIG. 3 is an explanatory diagram of a foundation block for revetment according to the present embodiment, FIG. 3A is a side view, and FIG. 3B is a rear view. FIG. 4 is an explanatory view of a foundation block for revetment according to this embodiment, FIG. 4A is a rear perspective view, and FIG. 4B is a front perspective view.
As shown in FIGS. 3 and 4, the revetment foundation block 1 has a rectangular front surface 1a, a rear surface 1b, an upper surface 1c, and a lower surface 1d that are long to the left and right, and left and right side surfaces 1e and 1f. Make the entire shape into a rectangular parallelepiped that is long to the left and right. As for the size of the foundation block 1 for revetment, for example, the front and rear width is 500 mm, the top and bottom height is 500 mm, and the left and right lengths are 2000 mm. However, the size is not limited to this.

  The base block 1 for revetment is cut into the block receiving part 11 where the revetment block 2 abuts by obliquely cutting the upper side of the rear surface 1b. The block receiving portion 11 is provided with concave portions 12 at two places on the left and right in the longitudinal direction. The left and right recesses 12 are provided at positions 1/4 and 3/4 from the left and right ends in the left-right direction of the revetment foundation block 1. The left and right recesses 12 have connecting hooks 13 that are connected to the connecting hooks 23 of the revetment block 2 via the connecting metal fittings 4. The connecting hook 13 is a U-shaped steel round bar that is attached to the recess.

The revetment foundation block 1 has concave metal fitting attachment portions 14 to which connection fittings 16 can be attached at both left and right ends in the longitudinal direction on the front face 1 a, and the metal fitting attachment portions 14 are provided with bolt holes 15.
In addition, about the shape of the foundation block 1 for revetment, it is not limited to this, The thing of another shape may be sufficient. Moreover, although the metal fitting attaching part 14 is respectively provided in the both right and left ends of the front surface 1a, this metal fitting attaching part 14 does not need to be.

FIG. 5 is an explanatory diagram of a revetment block, FIG. 5A is a front view, FIG. 5B is a plan view, and FIG. 5C is a perspective view.
A plurality of revetment blocks 2 are installed in the left-right direction and the up-down direction on the revetment foundation block 1 located at the bottom of the dike slope.

  As shown in FIG. 5, the revetment block 2 has a square upper surface 2 a and a lower surface 2 b and four side surfaces 2 c, and a base 21 that is square in a top view, and is integrally formed with the upper surface 2 a of the base 21. It comprises four quadrangular frustum-shaped protrusions 22 provided on the surface. The size of the revetment block 2 is, for example, a front and rear length of 1000 mm, a left and right length of 1000 mm, and a vertical height including the protrusions 22 of 250 mm. However, the shape and size are not limited to this.

  The revetment block 2 has chamfered corners and has hooks 23 for connection. The connection hook 23 is a U-shaped steel round bar material that is attached to the four corners of the revetment block 2 in the same manner as the connection hook 13 of the revetment foundation block 1. Further, on the four side surfaces 2c of the revetment block 2, small protrusions 24 protruding from the side surface 2c are provided at two lower positions. As a result, when the revetment blocks 2 are installed side by side in the left-right direction or the up-down direction, the entire side surface 2c of the adjacent revetment block 2 does not hit but only the protruding small protrusion 24 hits, and the adjacent revetment block 2 It can be installed in a state where they are neatly arranged without shifting up and down, left and right.

Next, the construction of the dike of the revetment foundation block 1 and the revetment block 2 on the slope on the land side will be described.
FIGS. 6, 7 and 8 are explanatory diagrams showing the installation steps of the revetment foundation block and the revetment block.

  As shown in FIG. 6, the revetment foundation block 1 and the revetment block 2 are constructed by installing a plurality of revetment foundation blocks 1 in the left-right direction on a foundation 3 extending in the left-right direction. The revetment foundation block 1 attaches connection fittings 16 with bolts 17 to the fitting attachment portions 14 provided at the left and right ends of the front face 1 a, and connects the adjacent revetment foundation blocks 1 with each other. After installing the revetment foundation block 1, a plurality of first-stage revetment blocks 2 are stacked on the revetment foundation block 1 in the left-right direction as shown in FIG. At this time, the connecting hook 13 of the revetment foundation block 1 and the connecting hook 23 of the two first-stage revetment blocks 2 adjacent to each other are connected via the connecting metal fitting 4.

  Next, after stacking the first-stage revetment blocks 2, as shown in FIG. 8, a plurality of second-stage revetment blocks 2 are stacked on the first-stage revetment block 2 in the left-right direction. At this time, the connecting hooks 23 of the two adjacent first-stage revetment blocks 2 are connected to the connecting hooks 23 of the two adjacent second-stage revetment blocks 2 via the connection fitting 4.

  By building up the revetment block 2 to a predetermined height which is the upper end of the dike, the revetment foundation block 1 and the revetment block 2 are constructed on the land side of the dike. Moreover, the revetment foundation block 1, the first-stage revetment block 2, and the revetment block 2 above the first-stage revetment block 2 are all connected via a connection fitting 4.

FIG. 9 is an explanatory view showing the connecting metal fitting, FIG. 9A is a plan view, and FIG. 9B is a side view. FIG. 10 is an explanatory view showing a usage state of the connecting metal fitting.
For example, as shown in FIG. 9, the connecting metal fitting 4 for connecting the revetment foundation block 1 and the revetment block 2 or the revetment blocks 2 is formed by using a single steel round bar material in a U shape and a side view J. The main body 41 is bent so as to have a letter shape and is threaded at both ends thereof, a plate-like seam plate 42 attached to both ends of the main body 41, and two nuts 43. However, the connection metal fitting 4 is not limited to this, and other things may be sufficient.

  When connecting the revetment foundation block 1 and the revetment block 2 as shown in FIG. 10, the connecting metal 4 is used to connect the main body 41 of the two revetment blocks 2 adjacent to the connection hook 13 of the revetment foundation block 1. After passing through the connecting hook 23, a seam plate 42 is attached to both ends of the main body 41 and fastened with nuts 43, and the connecting hook 13 of the revetment foundation block 1 and the connecting hooks 23 of the two revetment blocks 2 are connected. Connected and fixed.

FIG. 11 is an explanatory view showing a usage state of the connection fitting.
As shown in FIG. 11, connecting fittings 16 are attached to the fitting attachment portions 14 provided at the left and right ends of the longitudinal direction of the front surface 1a of the revetment foundation block 1, and the connecting fitting 16 has a plate shape long to the left and right. It is fitted into the metal fitting part 14 and attached with a bolt 17. Thereby, the connection metal fitting 16 is attached over the metal fitting attachment part 14 of the adjacent foundation block 1 for revetment, and the adjacent foundation blocks 1 for revetment are connected.

  According to this embodiment, the block receiving portion 11 of the revetment foundation block 1 is provided with the recess 12 and the recess 12 has the connecting hook 13 so that the revetment foundation block 1 and the revetment block 2 are provided on the slope. At the time of construction, the connecting hook 13 of the revetment foundation block 1 and the connecting hook 23 of the revetment block 2 thereon can be connected via the connecting metal fitting 4. As a result, the revetment foundation block 1 and the revetment block 2 on the revetment can be firmly connected, and an overflow phenomenon occurs in the event of a large typhoon or torrential rain. Even if a large force due to the water pressure acts, the progress of deep digging can be delayed and the time until the levee breaks can be extended.

  Moreover, in the adjacent foundation block 1 for revetment, by attaching the connection metal fitting 16 over the metal fitting attachment part 14 of the adjacent foundation block 1 for revetment, adjacent foundation blocks 1 for revetment can be firmly connected. This makes it possible to solidify the revetment foundation block 1 and its surroundings.

  DESCRIPTION OF SYMBOLS 1 ... Foundation block for revetment, 1a ... Front surface, 1b ... Rear surface, 1c ... Upper surface, 1d ... Lower surface, 1e ... Side surface, 1f ... Side surface, 2 ... Revetment block, 2a ... Upper surface, 2b ... Lower surface, 2c ... Side surface, 3 ... Foundation, 4 ... Connecting bracket, 11 ... Block receiving portion, 12 ... Recess, 13 ... Connecting hook, 14 ... Fitting mounting portion, 15 ... Bolt hole, 16 ... Connecting bracket, 17 ... Bolt, 21 ... Base, 22 ... Protrusion , 23 ... connecting hook, 24 ... small projection, 41 ... main body, 42 ... seam plate, 43 ... nut, 51 ... base block for revetment, 51a ... front face, 51b ... rear face, 51c ... upper face, 51d ... lower face, 51e ... side face, 51f ... side face, 52 ... revetment block, 53 ... foundation, 54 ... block receiving portion, 55 ... connecting hook, 56 ... connecting bracket.

Claims (2)

A base block for revetment that is installed at the bottom of a plurality of revetment blocks stacked along the slope of the embankment and supports the revetment block,
It has a front, back, top, bottom, left and right sides and a rectangular parallelepiped shape that is long to the left and right.
A base for revetment characterized in that the upper side of the rear surface is a block receiving portion against which the revetment block abuts, a recess is provided in the block receiving portion, and a connecting hook that is connected to a connecting hook of the revetment block via a connection fitting in the recess is provided. block. In the basic block for revetment described in claim 1,
A foundation block for revetment characterized by having metal fitting attachment parts for attaching connecting fittings for connecting adjacent foundation blocks for revetment to the left and right ends in the longitudinal direction of the front surface.

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