JP6813823B1 - Embankment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an embankment capable of draining water in which a floating body is floated without being left behind between the bottom of the floating body and the bottom of a containment vacant space as the water level of a river drops. SOLUTION: An introduction / drainage channel 10 provided on a river 1 side of a foundation embankment portion 21 holds muddy water of the river 1 as the water level 22 of the river rises at the time of a flood, and a floating body 5 is formed from the bottom 11 of an empty space 20. The muddy water that is guided between the bottom 26 and the bottom 11 of the containment vacant space 20 to levitate the buoyant body 5 and is pushed out by the buoyant body 5 that sinks as the water level 22 of the river 1 drops is discharged from the bottom 11 of the containment vacant space 20. By draining water to the river 1 side, the muddy water in which the floating body 5 is floated can be drained from the accommodation vacant space 20 without being left behind as the water level 22 of the river 1 drops. [Selection diagram] Fig. 2

Description

The present invention relates to an embankment in which a floating body is levitated from a foundation embankment portion by water such as muddy water of a river at the time of flood due to torrential rain or the like.

The embankment disclosed in Patent Document 1 is provided on one side of the foundation embankment portion between a base wall surface having the same height as the foundation embankment portion and a water level-compatible wall surface installed in front of the foundation wall surface at predetermined intervals. An accommodation vacant space that opens upward is formed, and the levee pillars can be raised and lowered in this accommodation vacant space, the water level on the water level compatible wall surface side becomes higher than the water level compatible wall surface, and the water goes up and down over the water level compatible wall surface. The height of the embankment is increased by the elevating embankment pillar rising from the top of the foundation embankment as it enters between the embankment pillar and the containment space. However, in the embankment disclosed in Patent Document 1, even if the water level on the water level corresponding wall surface side becomes lower than the water level corresponding wall surface, the embankment pillar and the accommodation vacant space once get over the water level corresponding wall surface. There is a drawback that the water that enters between them remains without being drained from between the embankment pillar and the accommodation vacant space by the height of the wall surface corresponding to the water level.

Japanese Patent No. 5664888

The present invention has been made in view of the above background technology, and drains the water in which the floating body is floated without being left behind between the bottom of the floating body and the bottom of the containment space as the water level of the river drops. The purpose is to provide an embankment that can be used.
In the present invention, a containment vacant space is provided in a foundation embankment portion installed for a river so as to open at the top end of the foundation embankment portion and to be recessed from the opening to the inside of the foundation embankment portion. A hollow buoyant body is housed in the levee so that it can be lifted and settled, and as the river water level rises on the river side of the foundation embankment, river water is introduced from the bottom of the vacant space to the bottom of the buoyant body and the above. Between the bottom of the buoyant and the bottom of the vacant space, which is guided between the bottom of the vacant space and is pushed out by the buoyant body, which floats the buoyant body and sinks as the water level of the river drops. It is characterized in that an introduction / out-out channel for draining existing water from the bottom of the accommodation vacancy to the river side is provided.

According to the present invention, the introduction / derivation channel provided on the river side of the foundation embankment accommodates river water from the bottom of the vacant space to the bottom of the buoyant body and the vacant space as the water level of the river rises due to concentrated heavy rain or the like. The water that exists between the bottom of the buoyant and the bottom of the containment vacant space, which is guided to the bottom of the buoyant body and is pushed out by the buoyant body that floats and sinks as the water level of the river drops. By draining water from the bottom to the river side, the water that floats the floating body can be drained without leaving between the bottom of the floating body and the bottom of the containment vacant space as the water level of the river drops. .. In addition, the floating body does not spoil the landscape because it floats only during floods due to torrential rain.

The cross-sectional view which shows the embankment which concerns on embodiment for carrying out an invention. FIG. 5 is a cross-sectional view showing an internal structure of a foundation embankment portion according to a mode for carrying out the invention. A cross-sectional view in which a floating body is housed in a foundation embankment portion of an embankment according to a mode for carrying out the invention. The cross-sectional view which shows the movement at the time of a flood of the embankment which concerns on the embodiment for carrying out an invention. The plan view which shows the foundation embankment part which concerns on embodiment for carrying out an invention. The plan view which shows the sheet pile wall top plate lid of the foundation embankment part which concerns on embodiment for carrying out an invention. The plan view which shows the connection structure of the floating body of the embankment which concerns on embodiment of the invention. A cross-sectional view of the inside of the embankment according to the embodiment for carrying out the invention, cut in the length direction of the foundation embankment portion. A cross-sectional view cut in the length direction of the foundation embankment portion showing the movement of the embankment according to the embodiment of the invention at the time of flooding. The plan view which shows the buoyant body which concerns on embodiment for carrying out an invention. The front view which shows the buoyant body which concerns on the embodiment for carrying out an invention. The left side surface showing the buoyant body according to the embodiment for carrying out the invention. The right side surface showing the buoyant body according to the embodiment for carrying out the invention.

In the embankment according to the mode for carrying out the invention shown in FIG. 1, the accommodation vacant space 20 opens at the top end 23 of the foundation embankment portion 21 in the foundation embankment portion 21 installed for the river 1, and the top end 23 It is provided so as to be recessed inside the foundation embankment portion 21 from the opening of the above and extend in the length direction of the foundation embankment portion 21. A hollow floating body 5 is housed in the storage space 20 so as to be able to float and settle. The floating body 5 has a rectangular parallelepiped outer shape, and is hollow with a closed space 6 shown by a dotted line inside the floating body 5. The closed space 6 is a closed space in which the air existing inside the closed space 6 does not leak to the outside of the floating body 5. A plurality of floating bodies 5 are connected to each other in the length direction of the foundation embankment portion 21 and are housed in one storage space 20 so as to be able to float and settle.

An introduction lead-out channel 10 is provided on the river 1 side of the foundation embankment portion 21. The introduction / derivation channel 10 includes an opening 24 on the river 1 side and an opening 25 on the bottom 11 side of the accommodation vacant space 20. The portion connecting the opening 24 and the opening 25 of the introduction lead-out channel 10 is an underdrain provided inside the foundation embankment portion 21. The opening 24 of the introduction / derivation channel 10 is located above the steady water level 22 of the river 1, and is arranged at a position where the water of the river 1 does not enter during the steady flow of the river 1.

The introduction / derivation channel 10 receives water such as muddy water of the river 1 from the bottom 11 of the accommodation vacant space 20 to the bottom 11 of the accommodation vacant space 20 and the bottom 26 of the buoyant body 5 as the water level 22 of the river 1 rises due to concentrated heavy rain or the like. Floating body 5 is guided from the position indicated by the solid line to the position indicated by the virtual line, and as the water level 22 of the river 1 decreases, the floating body 5 is subsided from the position indicated by the virtual line to the position indicated by the solid line. The water existing between the bottom 26 of the floating body 5 pushed out by the body 5 and the bottom 11 of the accommodation vacant space 20 is drained from the bottom 11 of the accommodation vacant space 20 to the river 1 side. Due to the configuration of the introduction and derivation channel 10, the water in which the floating body 5 is floated is drained without being left behind between the bottom 11 of the accommodation vacant space 20 and the bottom 26 of the floating body 5 as the water level 22 of the river 1 drops. Will be done.

When the floating body 5 is subsided and accommodated in the accommodation vacant space 20 while the water level 22 of the river 1 is steady, the upper surface of the floating body 5 and the top end 23 of the foundation embankment 21 are at the same height. The upper surface of the floating body 5 and the top end 23 of the foundation embankment portion 21 form one road surface so as not to hinder the walking of a person or the running of a car.

Hereinafter, details of the embankment according to the embodiment for carrying out the invention will be described with reference to FIGS. 2 to 13. The foundation embankment portion 21 is composed of an embankment structure or a reinforced concrete structure, and can be similarly applied to either an existing installation already installed or a new installation newly installed.

As shown in FIG. 2, the wall surface of the accommodation vacant space 20 is composed of the steel sheet pile wall 2 to reinforce the foundation embankment portion 21. The steel sheet pile wall 2 penetrates the foundation embankment portion 21 and the foundation ground 3 in the vertical direction and is rooted in the support ground 4, so that the reinforcement to the foundation embankment portion 21 is increased. A plurality of steel sheet pile walls 2 are connected in the length direction of the foundation embankment portion 21 and are continuously installed. A plurality of steel sheet pile walls 2 connected in the length direction of the foundation embankment portion 21 and continuously installed are arranged in two rows separated by a predetermined interval in the width direction of the foundation embankment portion 21. The accommodation space 20 is located between the two rows of steel sheet pile walls 2.

The steel sheet pile top plate lid 7 is arranged at a position recessed inward from the top end 23 of the foundation embankment portion 21 and is fixed to the top end of the steel sheet pile wall 2 to increase the strength of the steel sheet pile wall 2. The recesses B between the upper surface of the steel sheet pile top plate lid 7 and the top end 23 of the foundation embankment portion 21 are left and right of the upper part of the floating body 5 when the floating body 5 is settled in the accommodation space 20 and accommodated. It is a portion that accommodates the floating body upper stopper C (see FIG. 12) that protrudes laterally from the edge portion and also accommodates the top end side stopper 14 that protrudes laterally from the front-rear edge portion in the connecting direction of the floating body 5. ..

The tie rod 8 maintains a predetermined distance between the left and right steel sheet pile walls 2 by connecting the steel sheet pile walls 2 facing each other at a predetermined distance to the left and right.

The concrete 9 is constructed at the bottom 11 of the containment vacant space 20, and facilitates the collection of muddy water flowing into the containment vacant space 20 from the introduction lead-out channel 10 to the accommodation vacant space 20 and the muddy water entering the containment vacant space 20. It is intended to facilitate discharge from the place 20 to the introduction / derivation water channel 10.

The utility tunnel 17 is a space for laying electricity, communication, water, gas, and the like. The outlet side of the introduction / derivation channel 10 penetrates the steel sheet pile wall 2 and the concrete 9.

The position detection sensor 18 is provided on the steel sheet pile wall 2. The sensor unit of the position detection sensor 18 projects to the accommodation space 20 and outputs a signal for electrically detecting how far the buoyant body 5 is floating. The water depth detection sensor 19 is provided on the steel sheet pile wall 2. The sensor unit of the water depth detection sensor 19 projects into the accommodation space 20 and outputs a signal obtained by electrically measuring the water level flowing into the storage space 20. The signals output from the position detection sensor 18 and the water depth detection sensor 19 are connected to the control panel provided for each of the plurality of floats 5 by a cable. The control panel provided for each levitation body 5 can wirelessly send the signals received from the position detection sensor 18 and the water depth detection sensor 19 to the monitoring post.

For example, at a monitoring station, signals received from the position detection sensor 18 and the water depth detection sensor 19 via cables and control panels are transmitted to the government office via a mobile phone line, and the government office transmits them to local residents as evacuation information via disaster prevention radio. By doing so, local residents can evacuate appropriately.

As shown in FIG. 3, in a state where the storage space 20 partitioned by the steel sheet pile wall 2 does not contain water from the river 1, the floating body 5 is stored in the storage space 20 from above. The upper stopper C of the buoyant body is taken into the recess B, the buoyant body 5 is not lowered any more, and the bottom portion 26 of the buoyant body 5 is separated from the tie rod 8 so as not to collide with the tie rod 8. A common groove 17 can be secured.

As shown in FIG. 4, the water level 22 of the river 1 rises due to torrential rain or the like, and water such as muddy water of the river 1 collects in the accommodation vacant space 20 from the introduction lead-out channel 10 and floats the floating body 5. Since the levitation body 5 floats above the top end 23 of the foundation embankment portion 21 in this way, even if the water level 22 of the river 1 exceeds the top end 23 of the foundation embankment portion 21, water such as muddy water of the river 1 remains. Since it is blocked by the levitation body 5, it does not overflow beyond the levitation body 5 to the side of the top end 23 of the foundation embankment portion 21, and the flooding of the river 1 can be prevented.
As the water level 22 of the river 1 drops, the water such as muddy water collected in the containment vacant space 20 returns to the river 1 via the introduction and derivation channel 10, and the levitation body 5 is the original water disappeared as shown in FIG. Return to position.

As shown in FIG. 5, a plurality of steel sheet pile walls 2 are continuously installed in the accommodation space 20 of the foundation embankment portion 21 by being connected in the length direction of the foundation embankment portion 21. A plurality of steel sheet pile walls 2 connected by a steel sheet pile joint 27 in the length direction of the foundation embankment portion 21 and continuously installed are two rows facing each other at predetermined intervals in the width direction of the foundation embankment portion 21. It has become. The accommodation space 20 is located between the two rows of steel sheet pile walls 2.

As shown in FIG. 6, the steel sheet pile top plate lids 7 are continuously installed in the length direction of the foundation embankment portion 21 and are separated in the width direction of the foundation embankment portion 21 at predetermined intervals to form two rows facing each other. Each row of steel sheet pile walls 2 is fixed to the top ends of a plurality of steel sheet pile walls 2.

As shown in FIG. 7, a convex guide rail 12a is fixed to the central portion of the left side surface of the floating body 5, and a concave guide rail 12b is fixed to the central portion of the right side so that the individual floating bodies 5 can slide up and down, and the floating body 5 slides up and down. Even so, since the plurality of floating bodies 5 that are designed to prevent water leakage between the floating bodies 5 are connected by the convex guide rail 12a and the concave guide rail 12b, the plurality of floating bodies 5 are individually connected. Lifting and lowering operation becomes smooth. The top end side stopper 14 is detachably fixed to the steel sheet pile top plate lid 7 with a screw member 16 such as a bolt. By stopping the ascending body 5 from the steel sheet pile top plate lid 7, the floating body 5 is prevented from coming out of the accommodation space 20. Further, by removing the screw member 16 and removing the top end side stopper 14 from the accommodation space 20, the floating body 5 can be taken out upward from the storage space 20 to easily move the floating body 5 and the storage space 20 and their surroundings. Can be maintained.

As shown in FIG. 8, the convex guide rail 12a and the concave guide rail 12b are fitted to each other so as to be movable in the vertical direction, and a plurality of floating bodies 5 are continuously installed in the length direction of the foundation embankment portion 21. Has been done.

As shown in FIG. 9, when the buoyant body 5 is continuously installed in the length direction of the foundation embankment portion 21 and the buoyant body 5 is lifted by the water entering the accommodation vacant space 20, the buoyant body 5 is accommodated. The height of the buoyant body 5 increases as the water level 15 of water such as muddy water entering the vacant space 20 rises. If the floating body 5 is lifted too much, the lower stopper 13a or 13b of the floating body hits the stopper 14 on the top end side and cannot be lifted.
If the floating body lower stopper 13a or 13b is removably fixed to the floating body 5 with a screw member such as a bolt (not shown), the screw member (not shown) is removed and the floating body lower stopper 13a or 13b is removed. By removing the buoyant body 5 from the buoyant body 5, the buoyant body 5 can be taken out upward from the accommodation vacant space 20, and the buoyant body 5 and the accommodation vacant space 20 and their surroundings can be easily maintained.

As shown in FIGS. 10 to 13, a convex guide rail 12a and a stopper 13a on the lower side of the floating body are fixed to the left side surface of the floating body 5. The convex guide rail 12a is located at the center of the left side surface of the floating body 5 in the front-rear direction and extends in the vertical direction. The floating body side stopper 13a is separated from the convex guide rail 12a in the front-rear direction with the convex guide rail 12a sandwiched in the front-rear direction, is located at the middle portion in the vertical direction of the left side surface of the floating body 5, and projects to the left side. There is.

A concave guide rail 12b and a floating body side stopper 13b are fixed to the right side surface of the floating body 5. The concave guide rail 12b is located at the center of the right side surface of the floating body 5 in the front-rear direction and extends in the vertical direction. The buoyant body side stopper 13b is separated from the concave guide rail 12b in the front-rear direction with the concave guide rail 12b sandwiched in the front-rear direction, is located at the middle portion in the vertical direction of the left side surface of the buoyant body 5, and projects to the left side. There is.

By using stainless steel or stainless clad steel as the material of the steel sheet pile wall 2, the service life of the steel sheet pile wall 2 is extended.

The symmetrical view of the plan view of the floating body 5 shown in FIG. 10 is a bottom view of the floating body 5. Further, the symmetrical view of the front view of the floating body 5 shown in FIG. 11 is a rear view of the floating body 5.

1 River 2 Steel sheet pile wall 3 Foundation ground 4 Supporting ground 5 Floating body 6 Closed space 7 Steel sheet pile top plate lid 8 Tie rod 9 Concrete 10 Introducing lead water channel 11 Bottom of accommodation space 20 12 Guide rail 13 Floating body side stopper 14 Top end side Stopper 15 River water 16 Thread member 17 Joint groove 18 Position detection sensor 19 Water depth detection sensor 20 Containment vacant space 21 Foundation embankment 22 River 1 water level 23 Top 24 Opening 25 Opening 26 Floating body 5 bottom 27 Steel sheet pile joint

Claims (3)

A containment vacant space is provided in the foundation embankment portion installed for a river so as to open at the top end of the foundation embankment portion and to be recessed from the opening to the inside of the foundation embankment portion, and the containment vacant space is hollow. The buoyant body is housed so that it can be lifted and settled, and as the water level of the river rises on the river side of the foundation embankment, the river water is transferred from the bottom of the vacant space to the bottom of the buoyant body and the vacant space. The water that exists between the bottom of the buoyant body and the bottom of the containment vacant space, which is guided between the buoyant body and is pushed out by the buoyant body that floats the buoyant body and sinks as the water level of the river drops. The embankment is characterized in that an introduction / leading water channel for draining water from the bottom of the containment vacant space to the river side is provided , and the wall surface of the containment vacant space is composed of a steel sheet pile wall.
A plurality of the steel sheet pile walls are continuously installed in the length direction of the foundation embankment, and are continuously installed at the top ends of the plurality of steel sheet pile walls in the length direction of the foundation embankment. A levee characterized by a fixed steel sheet pile top plate lid. The floating body is provided with a stopper on the lower side of the floating body, and on the opening side of the accommodation space, the stopper on the top end side that collides with the stopper on the floating body side and regulates the floating of the floating body is the steel sheet pile top plate lid. The embankment according to claim 1, wherein the embankment is detachably provided in the above. A containment vacant space is provided in the foundation embankment portion installed for a river so as to open at the top end of the foundation embankment portion and to be recessed inside the foundation embankment portion from the opening, and the containment vacant space is hollow. The buoyant body is housed so that it can be lifted and settled, and as the water level of the river rises on the river side of the foundation embankment, the river water is transferred from the bottom of the vacant space to the bottom of the buoyant body and the vacant space. The water that exists between the bottom of the levee and the bottom of the containment vacant space, which is guided between the levee to the bottom and is pushed out by the levee that floats and sinks as the water level of the river drops. The embankment is characterized in that an introduction-leading water channel for draining water from the bottom of the containment vacant space to the river side is provided. The embankment is characterized in that a top-end stopper that collides with the floating body-side stopper and regulates the floating of the floating body is detachably provided.

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