JP2002021041A - Movable retaining wall and movable revetment method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a movable retaining wall and a movable revetment method with an excellent durability by moving the retaining wall in response to adding/ releasing a water pressure. SOLUTION: A plurality of panels 2 are stacked on natural ground, the panels 2 are tensioned and fixed with fixing and anchoring members 3 such as precast steel rods, wires or the like in such a manner that the panel 2 can be penetrated in the stacking direction, and jointing portions of each panel 2 are made movable and its one side is fixed to the natural ground and the other side is fixed to the panel and the anchor 4 is also made movable in these movable retaining wall and movable revetment method.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall forming a revetment in a river, and more particularly to a movable retaining wall and a movable revetment method capable of coping with a change in water pressure due to a rise or fall in a water level.

[0002]

2. Description of the Related Art Conventionally, a retaining wall forming a revetment is formed by excavating a quay wall, flattening the quay wall to improve the flow of water, and reinforcing and fixing the quay wall with concrete. A conventional revetment method will be described with reference to FIGS. Figure 1
Reference numerals 0 and 11 are cross-sectional explanatory views for explaining a conventional revetment method.

[0003] As shown in FIG. 10, a conventional seawall method is as follows.
Excavation and flattening of ground A, foundation block 1 on the bottom of ground
Is formed, and concrete panels 3 are stacked thereon,
A backing material B such as air mortar is filled between the ground A and the back surface of the concrete panel 3. Then, as shown in FIG. 11, the head of the anchor 4 previously inserted and fixed to the ground A is fixed to the concrete panel 3, and the anchor 4 is tensioned. In this way, a conventional seawall is produced.

[0004] As a conventional technology related to revetment,
JP-A-9-2420 published on September 16, 1997
There is No. 40 "Revetment method covering structure" (applicant: Nanno Concrete Industry Co., Ltd., inventor: Takejiro Yamada). According to the present invention, a foundation work 12 is constructed below a slope 11 of a river, and panels 20 and 21 are integrated on both sides thereof, and backfill concrete is applied to a gap between the panels 20 and 21. is there.

[0005]

However, in the above-mentioned conventional retaining wall for revetment, when the water level is high, the water pressure is applied to the retaining wall, and when the water level is low, the retaining wall is released from the water pressure. As a result, a creep phenomenon occurs in which the ground expands and contracts. Due to this creep phenomenon, stress occurs on the concrete retaining wall, causing cracks in the concrete, and at the same time, the backfill material injected between the concrete and the ground flows out,
There was a problem that the retaining wall could collapse if pulled.

The present invention has been made in view of the above circumstances, and provides a movable retaining wall and a movable revetment method with excellent durability by moving the retaining wall in response to pressurization / release of water pressure. The purpose is to do.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides a movable retaining wall comprising a plurality of panels arranged horizontally and vertically along the ground surface, and A base block installed on the bottom of the mountain, one end fixed to the base block, a fixing fixing member that penetrates the panel in the vertical direction and the other end is tension-fixed, A panel having an anchor fixed to a specific panel, wherein a connecting portion of a vertically stacked panel, a connecting portion of a horizontally arranged panel, and an anchor head portion have a movable structure. Therefore, the entire retaining wall can be deformed according to the state of the water pressure applied to the retaining wall, and the durability of the retaining wall can be improved.

According to the present invention, in a movable revetment method, a panel is provided in which a base block is disposed and fixed on the bottom of a ground, one end of a fixing member for fixing is fixed to the base block, and a through-hole for penetrating the fixing member is provided. A panel in which a connection portion with another panel has a movable structure is stacked while allowing the other end of the fixing fixing member to pass through the through hole, and the other end of the fixing fixing member is tension-fixed and arranged. A backfill material is filled between the back of the panel and the ground surface, and a specific panel is tensioned and fixed with an anchor cast into the ground, and is held according to the water pressure applied to the retaining wall. An action in which the entire wall can be deformed can be formed, and the durability of the retaining wall can be improved.

According to the present invention, in a movable retaining wall, a plurality of panels are a beam at an upper end, a beam at a lower end, a plate-like body connecting both beams, a beam at one end and a beam at the other end. The panel has a structure in which a horizontal connecting portion of the panel is movable in the horizontal direction, and the panel having the tension fixing member against water pressure has strength. The retaining wall can be deformed by the horizontal movement of the panel connecting portion, and the durability of the retaining wall as a whole against water pressure can be improved.

[0010]

Embodiments of the present invention will be described with reference to the drawings. In the movable retaining wall and movable revetment method according to the embodiment of the present invention, a plurality of concrete panels are stacked on the ground and tensioned by a PC (precast) steel rod or wire or the like so as to penetrate the panels in the stacked direction. While fixing, making the connection part of each panel movable,
One anchor is fixed to the ground and the other is fixed to the panel. The anchor is also movable, so the retaining wall composed of the panel can be moved in response to pressurization / release of water pressure, improving the durability of the retaining wall That can be done.

A movable retaining wall (main retaining wall) according to an embodiment of the present invention will be described with reference to FIG. FIG. 1 is an explanatory sectional view of a movable retaining wall according to an embodiment of the present invention.
As shown in FIG. 1, the retaining wall fixes a base block 1, a plurality of panels 2 stacked thereon, a fixing member 3 for connecting the panels 2, and the panel 2 to the ground A. And an anchor 4.

Next, each part of the present retaining wall will be specifically described.
The foundation block 1 is installed on the bottom surface of the ground A. The base block 1 may be fixed in the vertical direction with an anchor. Further, one end of a fixing fixing member 3 is fixed to the base block 1.

A plurality of concrete panels (hereinafter simply referred to as “panels”) 2 are arranged in the horizontal direction along the ground A and are stacked in the vertical direction. Further, the panel 2 is provided with a through hole through which the fixing fixing member 3 penetrates in the stacking direction. The panel 2 is made of precast concrete or steel plate.

The fixing fixing member 3 has one end fixed to the base block 1, the other end penetrating through the through hole of the panel 2 to connect the panels 2 in the vertical direction, and the other end is connected to the end of the stack. The upper panel 2 is fixed in tension. Specifically, as shown in FIG. 2, one panel 2 is formed with two through holes 2 e in the vertical direction, and by stacking the panels in the vertical direction, the through holes 2 e from the top to the bottom are formed. Will form one continuous through hole. FIG. 2 is an explanatory plan view showing a state of the panel according to the embodiment of the present invention. The fixing fixing member 3 is made of a high-strength steel material suitable for applying prestress, such as a threaded deformed steel bar for installing a precast (PC), a PC steel bar, a PC steel wire or a PC steel stranded wire. Used.

Further, a vertical connecting portion of the panel 2 (FIG. 2)
3, the shape of the lower end of the upper panel 2a is convex, and the shape of the upper end of the lower panel 2b is concave, as shown in FIG. ing.
FIG. 3 is an explanatory cross-sectional view of a connecting portion at a portion X in FIG. Then, the upper panel 2 is recessed in the lower panel 2b.
The convex shape of a is fitted, and the upper and lower panels 2 are movable with the fitted portion as a fulcrum.

Further, a horizontal connecting portion of the panel 2 (FIG. 2)
4), as shown in FIG. 4, the shape of the right end of the left panel 2c is convex, and the shape of the left end of the right panel 2d is concave. I have.
FIG. 4 is an explanatory cross-sectional view of a connecting portion in a Y portion in FIG. Then, the left panel 2 is formed in a concave shape of the right panel 2d.
The convex shape of c is fitted, and the left and right panels 2 are movable with the fitted portion as a fulcrum.

The anchor 4 is previously cast on the ground A, and tensions and fixes some of the plurality of panels 2. The anchor head is buried in the panel 2 so as not to be affected by flowing water. In particular,
As shown in FIG. 2, the anchor 4 fixes the specific panel 2 in tension. In addition, the panel 2 portion that is tensionally fixed by the anchor 4 has a structure that can be moved in a direction perpendicular to the ground A surface under the influence of water pressure.

Next, a revetment method according to an embodiment of the present invention (this revetment method) will be described with reference to FIGS.
FIG. 5 and FIG. 6 are cross-sectional explanatory views showing the revetment method according to the embodiment of the present invention. As shown in FIG. 5, the foundation block 1 is installed on the bottom surface of the excavated ground A and fixed with an anchor or the like. When forming the basic block 1, one end of the fixing fixing member 3 such as a PC steel bar is embedded, and the fixing fixing member 3 is erected along the ground A.

Next, as shown in FIG. 6, the panel 2 is installed and stacked from the upper end portion of the fixing fixing member 3 by penetrating the fixing fixing member 3 into the through hole 2e, and the panel 2 of the final stage is formed. At the upper part, the end of the fixing member 3 is tightened. Then, a backfill material such as air mortar is filled between the ground A and the back surface of the panel 2, and a part of the panel 2 is tensioned and fixed by using an anchor 4 that has been cast in advance. As a result, FIG.
The retaining wall shown in is completed and the revetment method is completed.

Next, the operation of the retaining wall when the water level rises and falls will be described. When the water level rises due to rainfall, the water pressure on the retaining wall increases. Here, since the panel 2 is configured to be movable at the upper, lower, left, and right connecting portions,
The state of the entire panel is deformed according to the water pressure. Specifically, since water pressure is applied to the main retaining wall, the shape changes to a shape in which the entire panel is pressed.

Further, when the water level decreases and the water pressure applied to the main holding wall disappears, a force for expanding the main holding wall by the repulsive force is applied. Due to this repulsive force, the entire panel changes to a shape as if it were pushed out. Note that the deformation of the shape of the entire panel differs depending on the level of the water level.

Further, not only the connecting portion of the panel but also the panel portion tensioned and fixed by the anchor 4 can move in the vertical direction with respect to the ground A, so that the deformation such that the entire panel is pushed in or pushed out. Will be added.

According to the present retaining wall and the present revetment method, the panel 2
Is movable in the vertical and horizontal connecting parts, and the head part of the anchor 4 is also movable, so the entire retaining wall can be deformed according to the water pressure applied to the retaining wall, improving the durability of the retaining wall There is an effect that can be made.

Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 7 is an explanatory plan view showing a configuration of a panel portion according to another embodiment of the present invention.
FIG. 8 is an explanatory diagram showing a part of a connecting portion according to another embodiment of the present invention, and FIG. 9 is a cross-sectional explanatory diagram showing a cross section of the entire retaining wall using FIG. 7 or FIG. .

As shown in FIG. 7, the panel 2 includes a beam 2f at the upper end where the reinforcing bar is incorporated, a beam 2g at the lower end where the reinforcing bar is incorporated, and a plate provided between the beam 2f and the beam 2g. And a steel plate 2h as a tension fixing member.
I am nervous. The end of the PC steel rod 5 is the beam 2
It is nervous embedded in f and 2g. In FIG. 7, 1
Four PC steel bars are attached to one panel 3.

The PC steel bar 5 extends and contracts in the vertical direction, and the connecting portion of the panel 2 in the horizontal direction can be expanded or returned in the horizontal direction. ing. An anchor 4 is attached to the beams 2f and 2g, and an anchor head is drawn in FIG.

Next, the structure of the connecting portion of the panel 2 will be described with reference to FIG. One beam 2 in the adjacent panel 2
The g is embedded with a protruding pin 6a made of a steel material, and the other beam 2g is formed with a cap 6b for accommodating the pin 6a in opposition to the pin 6a. In the example of FIG. 8, the beam 2g at the lower end of the panel 2 has been described, but the beam 2f at the upper end of the panel 2 has the same configuration. Therefore,
Even if the panels are spread, the pin 6a is
As long as the panel 2 moves within the range b, the panel 2 does not come off, and the panel 2 spreads in the horizontal direction at the connecting portion or returns to the original position.

The cross section of the entire retaining wall using the panels of FIGS. 7 and 8 is as shown in FIG. Panel 2 Beam 2
An anchor 4 is attached to f and 2g and is fixed in tension. Since the reinforcing bars are incorporated in the beams 2f and 2g, there is no problem in strength even if the beams are embedded in the anchor head and embedded. Further, all the panels 2 may be fixed with the anchor 4, but in the present embodiment, a specific panel of the entire panel 2 is fixed with the anchor 4. The anchor 4 is also movable in the direction of the arrow in FIG.

Next, the operation of the retaining wall according to another embodiment of the present invention with respect to the water pressure will be described. The water level rises,
When the water pressure increases, a force for holding down the panel 2 is generated. By providing the PC steel bar 5 against this force, it is possible to prevent the panel 2 from being greatly deformed. In this case, the connecting portion of the panel 2 is in a state where it does not spread, and the anchor 4 is also held down.

When the water level falls and the water pressure decreases, the force for pressing down the panel 2 is lost, and conversely, a repulsive force is generated from the ground A side, and a force for pushing out the panel 2 is generated. By providing the PC steel bar 5 for this force, the panel 2
Can be prevented from being greatly deformed. Also, in this case,
Although the connecting portion of the panel 2 is in an expanded state, the provision of the pin 6a and the cap 6b shown in FIG. 8 prevents the panels 2 from coming off from each other. Further, the anchor 4 is in a state of being pushed out.

According to the retaining wall according to another embodiment of the present invention, a PC steel rod 5 for increasing the durability against water pressure is mounted in the panel 2, the connecting portion of the panel 2 is movable, and the anchor 4 Is movable, the panel 2 has strength against water pressure, and the connecting portion of the panel 2 and the anchor 4
The retaining wall is deformed at the anchor head portion, and the durability of the retaining wall as a whole against water pressure can be improved.

[0032]

According to the present invention, horizontal and vertical
A plurality of panels arranged in a vertical direction, a foundation block installed on the bottom of the ground, and a fixing fixing member having one end fixed to the base block, the other end being vertically penetrated through the panel, and being fixed in tension. And an anchor that is driven into the ground and fixed to a specific panel among a plurality of panels,
Since the connecting part of the vertically stacked panels, the connecting part of the panels arranged in the horizontal direction, and the anchor head part are a movable retaining wall with a movable structure,
The entire retaining wall can be deformed according to the water pressure applied to the retaining wall,
There is an effect that the durability of the retaining wall can be improved.

According to the present invention, there is provided a panel in which a base block is arranged and fixed on the bottom of a ground, one end of a fixing member for fixing is fixed to the base block, and a through-hole for penetrating the fixing member is provided. The panel with the movable part connected to the panel is stacked while the other end of the fixing member for fixing is passed through the through hole, and the other end of the fixing member for fixing is fixed in tension,
Filling the backing material between the rear surface of the placed panels and the ground surface, and using a movable seawall construction method where a specific panel is tensioned and fixed with an anchor installed on the ground, the hydraulic pressure applied to the retaining wall is reduced. There is an effect that the behavior in which the entire retaining wall can be deformed according to the situation can be formed, and the durability of the retaining wall can be improved.

According to the present invention, the plurality of panels include a beam at the upper end,
A lower end beam, a plate-like body connecting the two beams, a tension fixing member which is fixed at one end to the upper end beam and the other end to the lower end beam, and further includes a horizontal connecting portion of the panel. Because it is a movable retaining wall with a structure that is movable in the horizontal direction, the panel with the tension fixing member against water pressure has strength, and the retaining wall can be deformed by moving in the horizontal direction at the connection part of the panel, There is an effect that the durability of the retaining wall as a whole against water pressure can be improved.

[Brief description of the drawings]

FIG. 1 is an explanatory sectional view of a movable retaining wall according to an embodiment of the present invention.

FIG. 2 is an explanatory plan view showing a state of the panel according to the embodiment of the present invention.

FIG. 3 is an explanatory cross-sectional view of a connecting portion at a portion X in FIG. 2;

FIG. 4 is an explanatory sectional view of a connecting portion in a Y part of FIG. 2;

FIG. 5 is an explanatory cross-sectional view showing a revetment method according to the embodiment of the present invention.

FIG. 6 is an explanatory cross-sectional view showing a revetment method according to the embodiment of the present invention.

FIG. 7 is an explanatory plan view showing a configuration of a panel portion according to another embodiment of the present invention.

FIG. 8 is an explanatory view showing a part of a connecting portion according to another embodiment of the present invention.

9 is a cross-sectional explanatory view showing a cross section of the entire retaining wall using FIG. 7 or FIG. 8;

FIG. 10 is an explanatory sectional view for explaining a conventional seawall protection method.

FIG. 11 is an explanatory cross-sectional view for explaining a conventional revetment method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Basic block, 2 ... Panel, 2a ... Upper panel, 2b ... Lower panel, 2c ... Left panel, 2d
... right panel, 2e ... through hole, 2f ... top beam,
2g: Lower beam, 2h: Concrete plate, 3: Fixing fixing member, 4: Anchor, 5: PC steel bar, 6a
... Pin, 6b ... Cap

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shingen Nagaoka 1-3-1 Higashiueno, Taito-ku, Tokyo Free Industry Co., Ltd. F-term (reference) 2D018 DA00 2D048 AA15 AA17

Claims (6)

[Claims] 1. A plurality of panels arranged horizontally and vertically along a ground surface, a foundation block installed on a bottom surface of the ground, and one end fixed to the foundation block, and the panel is vertically A fixing member for fixing, the other end of which is penetrated in the direction, and an anchor fixed to a specific panel out of the plurality of panels while being laid on the ground, in the vertical direction. A movable retaining wall, characterized in that the connecting portion of the stacked panels has a movable structure. 2. The movable retaining wall according to claim 1, wherein a connecting portion of the panels arranged in a horizontal direction has a movable structure. 3. The movable retaining wall according to claim 1, wherein an anchor head portion of the anchor fixed to the specific panel is movable in a direction perpendicular to the ground surface. . 4. A base block is placed and fixed on the bottom of the ground,
A panel in which one end of a fixing fixing member is fixed to the base block, and a panel provided with a through-hole through which the fixing fixing member penetrates, wherein a panel connected to another panel has a movable structure, The fixing fixing member for fixing is stacked while penetrating the other end of the fixing fixing member, the other end of the fixing fixing member is tensionally fixed, and a backfill material is provided between the rear surface of the disposed panel and the ground surface. A movable revetment method characterized by filling and fixing a specific panel with an anchor cast in the ground. 5. A plurality of panels arranged along the ground surface include a beam at an upper end, a beam at a lower end, a plate-like body connecting the two beams, and one end having the other end connected to the upper end beam. A movable retaining wall, comprising: a tension fixing member fixed to the lower end beam and tensioned, wherein a horizontal connecting portion of the panel is configured to be movable in the horizontal direction. 6. The panel according to claim 5, wherein a horizontal connecting portion of the panel has a structure in which a protruding pin is provided on one panel and a cap for accommodating the pin is provided on the other panel. Movable retaining wall.