JP2653641B2 - River revetment method and hohari block used for it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a river revetment installed on the slope on the river side of a levee so that the levee is not damaged by running water when a large amount of water flows through the river due to flooding. Concerning the construction method and the tension block used for it.

[0002]

[Prior Art] During the high economic growth period of the Japanese economy,
Based on the pursuit of quantitative affluence, only the facilities that have the functions required for flood control and water use will be developed in river projects, and the completed facilities will create a landscape of dying concrete dykes. The result was.

[0003] In recent years, the people have demanded qualitative richness from quantitative richness, and in response, river businesses have maintained the beauty and moistness of the waterside and also considered the inhabitation of living organisms. The development of social capital based on the creation of rivers has been actively carried out.

[0004] Conventionally, there are the following river revetment methods along the above flow and the tension blocks used for them. First, as the tension block, as shown in FIGS. 9 and 10, a rectangular plate-shaped block body 2 to be installed on the slope.
1 and a rising portion 22 standing at the front end of the block body 21
From the outside of the rising part 22
3 can be attached by a connecting tool 24 such as a bolt and a nut. A rebar 25 for connection is provided on the periphery of the block body 21 so as to connect with the adjacent tension block.

Next, in the case of constructing a river revetment using the above-structured stretched block, (1) excavate a dike slope (2) install a mooring at the slope tip (3) Install crushed stone on the cut slope (4) Place backfill concrete on the crushed stone to secure the thickness of the revetment (5) Install the tension block on the backfill concrete in a horizontal straight line (6) Reinforced bars protruding from each of the tension blocks are welded to each other to connect adjacent tension blocks. (7) Concrete is filled in the gap between the tension blocks. (8) Each method Attach the artificial wood retaining wall to the upper part of the tension block with a connecting tool. (9) Fill the inside of each artificial wooden retaining wall with the soil. (10) Fill the soil with the grass on the stepped steps. The river revetment was completed through.

However, in the above-mentioned construction method using the conventional tension block, welding work for connecting adjacent tension blocks to each other is required, and the shortage of the thickness of the revetment for supporting the river revetment is insufficient in advance. In addition to the work of pouring concrete, since concrete is also poured separately, there is a problem in that it cannot be integrated with the tension block and the revetment strength cannot be expected sufficiently. In addition, since the connecting member such as a bolt connects the lawn block and the pseudo-wood soil retaining wall, the connecting operation is troublesome, and the connecting portion exposed on the surface may be corroded by contact with water.

[0007]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and a predetermined seawall retaining thickness can be reliably ensured, and a rigid seawall can be obtained by integrating the seawall. It is an object of the present invention to provide a river revetment method that can be used for construction, can be easily and efficiently constructed, and has no fear of corrosion, and a tension block used for the method.

[0008]

According to the river revetment method of the present invention, a pier is installed on a slope of a leveled slope, crushed stone is laid on the slope, and then a pair of legs are provided on the lower surface. A tension block having a step and a through hole for inserting a retaining wall on the upper surface and an anchor bar of the retaining wall, and the supporting step is arranged in a horizontal row. Sequentially arranged on the crushed stone, then insert the anchor bar at the bottom of the soil retaining wall into the through hole to project a part of it from the bottom surface of the block, stand up the soil retaining wall in a horizontal row on the supporting step, and then, Concrete is filled in the void between the crushed stone on the slope formed by a pair of legs and the lower surface of the tension block, and after solidifying with the anchor block together with the anchor reinforcement, the soil is filled inside the retaining wall. Step-like steps from the slope tip to the shoulder It is characterized in that form.

[0009] Further, the bank tension block used in the river bank construction method is a bank tension block arranged and installed on the slope, and a pair of legs corresponding to the thickness of the bank protection is provided on the lower surface of the block body. On the upper surface of the block body, a plurality of steps of support steps for planting a retaining wall for stair construction are formed in a direction crossing the slope, and the supporting steps have anchor bars at the lower end of the retaining wall. It is characterized in that through holes for inserting are provided at intervals.

[0010]

A pair of legs are provided on the lower surface of the lawn block corresponding to the thickness of the seawall, and concrete is filled into the gap between the crushed stone formed by the pair of legs and the lower surface of the lawn block. Because of the filling, a predetermined seawall thickness can be secured, and integration with the lawn block is achieved. Further, at this time, if the anchor streak is inserted into the through hole and stood upright on the support step, the soil retaining wall is fixed to the tension block by the concrete filling the void.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 3 show a tension block according to the present invention, which is a tension block 1 made of concrete.
On the upper surface of the rectangular plate-shaped block main body 3, three saw tooth-shaped support step portions 3, 3, 3 are continuously formed in the lateral direction at equal intervals, and one of them is formed. The support step portion 3 is provided at a position matching the lower edge of the block body 2. Further, each of the support step portions 3 is configured such that the slope side of the slope is substantially horizontal with respect to the slope when the slope block 1 is installed on the slope. Through-holes 4 reaching the lower surface of the block main body 2 are formed in a horizontal row on the surface of the support step portion 3 which is horizontal, from the lower end of the PC artificial wood soil retaining wall 5 shown in FIG. The extending anchor muscle 6 can be inserted.

On the lower surface of the block main body 2, a pair of leg portions 7, 7 corresponding to the thickness of the revetment are vertically provided so as not to overlap the positions of the through holes 4.

A procedure for forming a river bank using the above-structured block will be described with reference to FIGS. First, the topsoil on the slope 10 of the embankment to be constructed is scraped off to form the slope 11 in a leveled condition (see FIGS. 5A and 5B).
Next, the slanting structure 12 is installed at the tip of the slope 11 (see FIG. 5C). Next, a crushed stone 13 is laid over the entire slope 11 (see FIG. 5D).

After that, the tension block 1 having the above-mentioned structure is sequentially placed on the laid crushed stones 13 so that each support step portion 3 is in horizontal alignment with the support step portions 3 of the other tension extension blocks 1 which are laterally adjacent to each other. Arrange (see (A) of FIG. 6). At this time, each of the supporting step portions 3 is arranged along the slope of the slope, and the tension block 1 is arranged.
Has a substantially horizontal surface. Next, the anchor muscles 6 of the pseudo-wood soil retaining wall are inserted into the through-holes 4 formed in each of the tension blocks 1, and P is placed in a horizontal straight line without any space.
The C pseudo-wood soil retaining wall 5 is erected on the support step portion 3 (see FIG. 6B). Then, concrete 15 is filled into the gap 14 between the block body 2 formed by the pair of leg portions 7, 7 of each of the tension blocks and the crushed stone 13 on the slope (FIG. 6).
(See (C)). At this time, the concrete 15 to be filled
Together with the anchor bars 6 projecting from the lower surface of the block body 2 are solidified integrally with each of the tensioned blocks 1, and the PC pseudo wood soil retaining wall 5 is also firmly fixed at the same time. In the actual filling work of the concrete, the concrete is poured and filled every time the tension blocks are abutted from the tip of the toe in the direction of the shoulder in several steps until the shoulder is repeated.

Finally, soil 16 is placed inside the PC artificial wood soil retaining wall 5.
To form a step-like step from the tip of the slope to the shoulder of the slope, and turf 17 is planted in the step to complete the river revetment (see FIG. 7).

As the tension block used for this river revetment method, the above tension block having three support steps is replaced with two support steps 3 and 3 as shown in FIG. The normal tension blocks 1 formed at intervals may be used.

[0017]

According to the present invention, a pair of leg portions corresponding to the thickness of the revetment are provided in a protruding manner on the tension block to be used,
Since the revetment is constructed by filling concrete into the voids formed by the legs, the filled concrete and the lawn block can be reliably integrated, and a revetment with excellent strength can be provided. Moreover, the efficiency and labor saving of the construction can be achieved.

Further, since the anchoring bar of the retaining wall can be fixed to the retaining block by concrete filling the gap simply by inserting the anchor bar of the retaining wall into the hole formed in the retaining block, the work of constructing the stairs is extremely easy. And quickly
In addition, the mounting strength of the retaining wall fixed integrally with the tension block by the filling concrete is strong, and there is no possibility of corrosion. Furthermore, since it is possible to construct a plurality of stairs on a single upholstered block, it is possible to speed up the construction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a tension block of the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

3 is a cross-sectional view taken along the line YY of FIG.

FIG. 4 is a perspective view showing an example of a retaining wall used in the present invention.

5 (A), (B), (C), and (D) are explanatory views showing a construction procedure of the opening stage of the construction method according to the present invention.

6 (A), (B), and (C) are explanatory views showing the procedure for constructing the middle section of the construction method according to the present invention.

FIG. 7 is an explanatory view showing a construction procedure of the final stage of the construction method according to the present invention.

FIG. 8 is a perspective view showing another embodiment of the tension block according to the present invention.

FIG. 9 is a perspective view showing a tension block used in the conventional method and a connection state between the block and the retaining wall.

10 is a cross-sectional view of FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Legal block 2 Block main body 3 Support step part 4 Through-hole 5 Soil wall 6 Anchor bar 7 Leg 11 Ground leveled slope 12 Horidome 13 Crushed stone 14 Void 15 Concrete 16 Soil

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Masaaki Sasaki 34 Shinbori, Shinminato City, Toyama Prefecture Kyoei Concrete Co., Ltd. (56) References Japanese Patent Publication 5-85685 (JP, B2)

Claims (2)

(57) [Claims] 1. A method for setting a slope (11) on a slope of a leveled slope (11), laying crushed stone (13) on the slope, and a pair of legs (7) on a lower surface. , 7) and a supporting step portion (3) for implanting a retaining wall (5) on the upper surface and a through hole (4) for inserting an anchor bar (6) of the retaining wall (6).
Arranging the tension block (1) on which the supporting steps (3) are formed on the crushed stone (13) so that the supporting steps (3) are in a horizontal row.
Then, anchor holes (6) at the lower end of the retaining wall are placed in the through holes (4).
And a part of the block is protruded from the lower surface of the block, and the retaining wall (5) is erected in a horizontal row on the supporting step (3), and then formed by a pair of legs (7, 7). Concrete (15) was filled into the void (14) between the crushed stone (13) on the slope and the lower surface of the tension block (1) and solidified together with the anchor reinforcement (6) together with the tension block (1). After that, the river bank protection method is characterized in that the soil (16) is packed inside the retaining wall (5) to form a step-like step from the slope tip to the shoulder. 2. A tension block (1) arranged and arranged on a slope, wherein a pair of leg portions (7, 7) corresponding to the thickness of the revetment is provided on the lower surface of the block body (2), On the upper surface of the main body (2), a plurality of support steps (3) for planting a retaining wall (5) for stair construction are formed in a direction crossing the slope, and the support steps (3) are formed. In 3), a tension block, characterized in that through holes (4) for inserting the anchor streaks (6) at the lower end of the soil retaining wall are formed at intervals.