JP2006342521A - Shore embankment block - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shore embankment block less causing sink and collapse and installable in a short period. <P>SOLUTION: This shore embankment block comprises setting foundation blocks 1 installed on a ground on the lower side of a planned river floor RG and wall surface blocks 2 forming a wall surface for a quaywall on the upper side of the planned river floor RG. The setting foundation blocks 1 comprises the same overall height as a setting height. The bottom surface of the setting foundation forms a contact surface on the ground, and the upper surface thereof forms an installation surface for the wall surface blocks 2. The bottom part of the setting foundation blocks 1 is formed wider on its bottom side than on its upper side. Recessed parts 31 in which sediment is filled in installation are formed in the rear surface of the setting foundation blocks 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a revetment block. More particularly, the present invention relates to a revetment block used to form or reinforce a river quay.

  Conventionally, revetment blocks are generally used for the purpose of preventing damage to river revetments and preserving river ecosystems. Disasters also occur in rivers that have been revetd in this way, but the biggest cause is considered to be riverbed scouring due to river flow, so-called revetment disasters. For this reason, river revetments are rooted about 0.5 to 1.5m from the riverbed.

Although the above conventional examples are shown in Patent Documents 1 to 3, a typical revetment structure will be described with reference to FIG.
WL indicates the normal water level, and RG indicates the planned river bed. The planned riverbed RG is the height of the riverbed set during river construction.

As described above, the root blocks 101 are stacked on the lower surface by the planned riverbed RG. In the illustrated example, there are three stages. On the uppermost base block 101, several wall blocks 102 are stacked. The number of stacked stages is determined by the size of the river, but extends to above the water level WL.
The bottom concrete block 101 is provided with a foundation concrete 103 on the lower surface thereof. Between the blocks 101 and 102, the concrete 101 is filled and the blocks 101 and 102 are connected to each other.
Although the wall block 102 is expensive due to a demand for river environmental conservation, an environmental conservation block suitable for the habitat of plants and fish is used.
However, a cheap conventional type knowledge block is often used for the root block 101 for economic reasons.

By the way, the installation work of the conventional revetment block often takes days.
That is, in order to place the foundation concrete 103, it is necessary to wait for soil and sand to be removed, leveled, and the form 105 is erected before the ready-mixed concrete is poured and solidified. In addition, temporary work such as raising earth and sand or hitting a sheet pile is required so that water does not enter the construction site.
Moreover, since it is necessary to remove water when placing the foundation concrete, a pump is used for the water change work, and it takes about 10 to 20 days depending on the site conditions. .

  In addition, in the conventional revetment structure, if the amount of water increases due to heavy rain, etc., or if the water level continues for a long time, the ground at the bottom of the river bed will loosen, causing the multi-stage root block 101 to be displaced, or finally damaged. There are things to do.

JP-A-8-151644 JP-A-8-13518 JP 2003-328375 A

  In view of the above circumstances, an object of the present invention is to provide a revetment block that is unlikely to sink or collapse and can be installed in a short time.

The revetment block according to the first aspect of the present invention comprises a base foundation block installed on the ground below the planned river bed, and a wall block constituting a wall surface for the quay on the upper surface from the planned river bed. It has the same total height as the insertion height, its bottom surface is a ground contact surface with the ground, and its top surface is an installation surface of the wall block.
The revetment block according to the second aspect of the present invention is characterized in that a depth of a bottom portion of the base foundation block is wider than an upper portion thereof.
The revetment block according to a third aspect of the present invention is characterized in that a concave portion into which earth and sand are placed during construction is formed on the back surface of the base block.
The revetment block according to a fourth aspect of the present invention is characterized in that an upper surface groove for filling the infill concrete is formed on the upper surface of the base block.
The revetment block according to a fifth aspect of the present invention is characterized in that a side groove for packing is formed on a side surface of the base block.

According to the first aspect of the present invention, since the base block is integrated, it is difficult to fall even on loose ground. By completing the construction up to the planned riverbed height by installing a single foundation block, it is easy to prevent disasters caused by water level increase due to rainfall during the construction period, and the construction period can be greatly shortened. The number of days can be reduced to about 3 days, which is economical. Furthermore, water pollution due to river construction can be avoided by performing work under the riverbed in a short period of time.
According to the second aspect of the invention, since the area of the bottom surface is large, it is difficult to sink even if the ground is loosened at the time of disaster.
According to the third invention, since the recess is formed on the back surface, the weight is reduced and the construction is facilitated. Moreover, if earth and sand are put after construction, since a weight required as a foundation can be maintained, collapse can be prevented.
According to the fourth aspect of the invention, by filling the upper surface groove with the infilled concrete, the basement foundation block and the wall surface block stacked on the upper surface can be firmly connected, so that the breakup of the revetment can be prevented.
According to the fifth invention, when the rooting foundation block is installed in a curved shape along the river, a gap is formed between adjacent rooting foundation blocks, but the gap is eliminated by putting packing in the side groove. Can do.

Next, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view of a revetment block according to a first embodiment of the present invention. FIG. 2 is a perspective view of the foundation block. FIG. 3 is a side view of the foundation block. 4A is a left view of the basic block, and FIG. 4B is a plan view thereof.

The revetment block of the present invention is characterized by a rooting foundation block 1. The wall surface block 2 installed on the upper surface from the planned river bed RG is not particularly limited, and any type of block may be used. However, it is preferable to use an environmental conservation type block because it allows fish and plants to grow.
As shown in FIG. 1, the basement foundation block 1 is a large integrated block that is buried below the planned riverbed RG. Details will be described below.

As shown in FIGS. 2 to 4, the rooting basic block 1 has a quadrangular shape when viewed from the front and the back, and has a shape close to an unequal triangular shape when viewed from the side.
That is, the main body 11 is a rectangular thick plate-like member, and is an inclined member so that the upper part is retracted from the lower part.
On the lower front surface of the main body 11, a horizontal step portion 12 having a horizontal upper surface and a vertical front surface is formed.
The height of the base insertion base block 1 is such that the height of the main body portion 11 is the same as the installation depth of the construction portion, and further the height of the horizontal step portion 12 is added. Therefore, the total height is higher than the penetration dimension (usually 500 mm to 1000 mm).

On the upper surface of the main body portion 11 of the rooting base block 1, an upper surface groove 13 that is cut out in a triangular shape in a side view is formed along the width direction.
Further, side grooves 14 for inserting packing are formed on both side surfaces of the main body 11 in the vertical direction.

A support 21 is integrally provided on the rear surface of the main body 11. The support portion 21 includes a bottom wall 22 and left and right side walls 23. In addition, when the width | variety of the main-body part 11 is wide, you may provide the intermediate wall 24. FIG.
The bottom wall 22 has the same bottom area as that obtained by projecting the inclined main body 11 from vertically above. Since the side wall 23 and the intermediate wall 24 are members that connect the main body 11 and the bottom wall 21, they form a triangular shape in a side view.
Based on the above shape, the base block 1 has a depth BL at the bottom that is greater than a depth UL at the top surface.

  A portion surrounded by the bottom wall 22 and the side wall 23 of the support portion 21 and the back surface of the main body portion 11 is a concave portion 31. When the intermediate wall 24 is used, the concave portion 31 is divided into two left and right portions. Although this recessed part 31 is dented to the back surface of the main-body part 11, the recessed part 31 may be further deeply formed in the back surface itself of the main-body part 11, and the recessed part 31 may be made deeper.

Since the base block 1 has the recess 31 as described above, it is lightweight for its large size and volume. Therefore, since the handling at the time of construction is easy, it is easy to shorten the construction period.
However, if the concave portion 31 is filled with earth and sand after the construction, the weight necessary for the foundation can be secured, so that collapse does not easily occur.
Furthermore, since the bottom area is large, there is an advantage that it is difficult to fall even on loose ground.

Next, the construction method of the revetment block will be described.
First of all, excavate the root depth from the planned riverbed RG and level the bottom flat. In the construction method of the present invention, it is only necessary to level the ground, and there is no need to use concrete, so there is no need to use a formwork. In addition, the number of days for water change work can be shortened to about 3 days.
Place the foundation block 1 on the trace after finishing the leveling. Since the height of the foundation block 1 is adjusted to the root insertion height, there is usually 500 to 1500 mm. Therefore, the rooting foundation block 1 can be constructed alone in the vertical direction. In the width direction, as shown in FIG.

And, if the wall block 2 is stacked in multiple steps on the upper surface of the foundation block 1, a quay can be formed in the water above the planned river bed RG, and if it is further stacked, the quay is higher than the water level WL. Can be formed.
When the blocks are stacked, the upper surface groove 13 can be filled with concrete between the base foundation block 1 and the immediately upper wall block 2 and can be firmly bonded to each other.
In addition, the concrete can be packed between the wall blocks 2 of each step and between the adjacent wall blocks 2 of the same step and firmly bonded to each other.

  Furthermore, as shown in FIG. 5, the horizontal connection between the adjacent base insertion base blocks 1, 1 is to place the connection plate 15 so as to straddle the adjacent horizontal stepped portions 12, and to screw and join the bolts 16. Can do.

Moreover, as shown in FIG. 6, it is easy to install it along a river flow with a large curvature.
In this case, if the packing 17 is inserted between the side grooves 14 and 14 facing each other in the adjacent base block 1 and 1, penetration of water in the river can be prevented.

Next, the rooting basic block 1 of the second embodiment will be described with reference to FIG.
This base insertion base block 1 is formed with a rear stepped portion 18 from the upper part of the main body 11 toward the back. When concrete is also cast on the upper surface of the rear surface step portion 18, the connection between the wall surface blocks 2 and 2 can be further strengthened.

Next, the rooting basic block 1 of the third embodiment will be described with reference to FIG.
In this embodiment, the upper surface of the main body 11 is formed at a smaller angle rather than a right angle with respect to the front surface. For this reason, the revetment which made the wall surface block 2 shallower than the inclination of the main-body part 11 of the penetration base block 1 can be comprised.

It is sectional drawing of the revetment block concerning 1st Embodiment of this invention. It is a perspective view of a foundation block. It is a side view of a foundation block. (A) is a left view of the basic block, and (B) is a plan view of the same. It is the perspective view and connection part enlarged view of a seawall block of 1st Embodiment. It is a curve installation situation explanatory drawing and packing part enlarged view of a revetment block. It is sectional drawing of the bank protection block which concerns on 2nd Embodiment of this invention. It is sectional drawing of the bank protection block which concerns on 3rd Embodiment of this invention. It is sectional drawing of the conventional revetment block.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base insertion base block 2 Wall block 11 Main body part 12 Horizontal step part 13 Upper surface groove 14 Side surface groove 18 Rear surface step part 21 Support part 22 Bottom wall 23 Side wall 31 Recessed part

Claims (5)

A base block installed on the ground below the planned riverbed and a wall block that forms the wall for the quay on the upper surface from the planned riverbed,
The revetment base block has the same overall height as a replenishment height, a bottom surface thereof is a ground contact surface with the ground, and an upper surface thereof is an installation surface of the wall surface block. A revetment block characterized in that the bottom of the base foundation block is formed wider than the top. A revetment block characterized in that a concave portion is formed on the back surface of the basement foundation block to receive earth and sand during construction. A revetment block characterized in that an upper surface groove for filling infilled concrete is formed on the upper surface of the base block. A revetment block, characterized in that a side groove for packing is formed on a side surface of the base foundation block.

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