JP2018150679A - Connection member for construction of decorative coating protection wall of reinforcement banking wall - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection member for construction of a decorative coating protection wall of a reinforcement banking wall capable of surely keeping a position where a protective wall panel is initially constructed.SOLUTION: A connection member for construction of a decorative coating protection wall of a reinforcement banking wall 20 comprises a piston rod 22 provided with a piston 21, and a cylinder 23 having a first oil chamber 25, a second oil filler port 27, and a second oil chamber 28 provided with an oil tank 26 having an oil throttling hole part 33 in the second oil filler port 27. An oil leakage passage 29 exists at a space between the piston 21 and the cylinder 23, and when the piston 21 moves slowly in the cylinder 23, oil in the first oil chamber 25 flows into the second oil chamber 28 through the oil leakage passage 29, and the oil from the second oil chamber 28 moves to the oil tank 26 via the oil throttling hole part 33. In case of an earthquake, the piston 21 instantaneously moves a load to a protective wall panel to thereby instantaneously pressurize the cylinder 23 to lock movement of the piston 21.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a connecting member for constructing a decorative covering protective wall for a reinforcing embankment wall that connects the reinforcing embankment wall and the decorative covering protective wall when constructing a decorative covering protective wall for a reinforcing embankment wall.

Conventionally, concrete retaining walls and reinforced embankment walls have been constructed to construct roads and the like.
As a typical construction method of a reinforced embankment wall, a tail arme method, a multi-anchor method, and a geotextile method are disclosed (for example, Non-Patent Document 1).
As shown in FIG. 1 (a), the tail arme construction method constructs a reinforced embankment wall by attaching a plurality of strip steel materials to a wall surface material constructed on foundation concrete and spreading the embankment. As shown in Fig. 1 (b), the multi-anchor construction method builds a reinforced embankment wall by attaching tie bars (round steel) with anchors to the wall material constructed on the foundation concrete and spreading the embankment. To do. As shown in FIG. 1 (c), the geotextile construction method constructs a reinforced embankment wall by providing a plurality of nets made of synthetic polymer in the height direction on the wall material and spreading the embankment.

Takuya Iwamoto, Takayama National Highway Office In-house Study Group Design and construction of reinforced soil walls following revision of the H24 version retaining wall guideline Part 1 “General reinforced soil walls”, pages 8 to 10, [PDF] , February 5, 2015, ME Hida Regional Subcommittee, [Search February 13, 2017], Internet (URL: http://www.hisyu.co.jp/topics/2015/pdf/001_kk .pdf)

A loading test was performed on the reinforced embankment walls constructed by the above-described three reinforced embankment construction methods, and the results of observing the behavior of these wall bodies are shown in FIG. The loading test was performed under the same conditions (reinforcement soil height: 4.5 m, width: 3.0 m, wall surface material: 3.2 mm steel plate, embankment material: same material, same plan) for all construction methods. Is.
It can be seen that the reinforced embankment wall constructed by the tail arme method or the anchor method is displaced forward by about 6 to 8 mm. On the other hand, the reinforced embankment constructed by the geotextile method is displaced about 30 mm forward, and the reinforced embankment constructed by the geotextile method has the largest displacement.
In this way, when the wall surface of the reinforced embankment wall swells forward and deforms, in addition to being unfavorable in appearance, many years, a load is applied to the wall material of the reinforced embankment wall, resulting in distortion and cracks in the wall material, If a large load is applied to the wall material due to an earthquake, the wall material may be destroyed.

From the above problems, a reinforced embankment wall method having a double wall structure has been proposed. In this reinforcing embankment wall method, a protective wall panel is provided at a predetermined interval in front of the reinforcing embankment wall, and after connecting the wall material of the reinforcing embankment wall and the protective wall panel with a connecting belt, the reinforcing embankment wall and the protective wall panel The space formed between the two is filled with crushed stone (gravel) to construct a crushed stone layer. A feature is that a space is formed between the reinforced embankment wall and the protective wall panel so that a load from the reinforced embankment wall is not easily applied to the protective wall panel. Moreover, since the crushed stone layer functions as a drainage layer, drainage can be improved.
However, since the load from the reinforced embankment wall is transmitted to the protective wall panel through the crushed stone layer, the protective wall panel swells forward, and the initial construction position of the protective wall panel cannot be reliably maintained.

  The present invention provides a connecting member for constructing a decorative covering protective wall of a reinforced embankment wall for use in constructing a protective wall of a reinforced embankment wall that can reliably maintain the position where the protective wall panel was initially constructed. The purpose is to provide.

  The connecting member for constructing the decorative covering protective wall of the reinforcing embankment wall according to the present invention is a reinforcing embankment wall for constructing a protective wall that protects the wall of the reinforcing embankment wall constructed by compacting the embankment material with a reinforcing material interposed therebetween. The decorative covering protective wall construction method is used, and is installed in advance at a predetermined position, and between the reinforcing embankment wall and a support column to which a protective wall panel is attached, and the reinforced embankment wall wall surface is larger than the overhang dimension of the wall. A piston rod provided with a piston at the tip, a first oil chamber having a first oil supply port, a first oil chamber divided by the piston, and a second oil supply port And a cylinder having a second oil chamber provided with an oil tank having an oil throttle hole at the second oil supply port, and an oil leakage passage exists in a gap between the piston and the cylinder. Or a through hole in the piston Providing an oil leakage passage that communicates between the first oil chamber and the second oil chamber, and when the piston moves at a slow speed in the cylinder, the oil in the first oil chamber The oil that flows out from the oil leakage passage into the second oil chamber and overflows from the second oil chamber moves to the oil tank through the oil squeeze hole, thereby The wall surface automatically absorbs the displacement that squeezes out at a very slow speed of about 60 mm during the lapse of 1 to 3 years, due to the expansion and non-resistance operation effect under the ultra-low speed of the cylinder and the piston, and A load acting on the protective wall panel instantaneously in the event of a typhoon or earthquake causes the internal pressure of the cylinder to be instantaneously increased by instantaneous movement of the piston, and the movement of the piston is locked, thereby Side And, by safely 支保 the protective wall panels, and maintains the initial build position of the protective wall panel.

  The connecting member for constructing the decorative covering protective wall of the reinforcing embankment wall according to the present invention is a reinforcing embankment wall for constructing a protective wall that protects the wall of the reinforcing embankment wall constructed by compacting the embankment material with a reinforcing material interposed therebetween. The decorative covering protective wall construction method is used, and is installed in advance at a predetermined position, and between the reinforcing embankment wall and a support column to which a protective wall panel is attached, and the reinforced embankment wall wall surface is larger than the overhang dimension of the wall. A piston rod having a piston provided at the tip and a first oil supply port is provided with an interval, and an oil tank having an oil throttle hole is provided in the first oil supply port. The first oil chamber is separated from the first oil chamber by the piston, has a second oil supply port, and an oil tank having an oil throttle hole is provided in the second oil supply port at the second oil supply port. A cylinder having a second oil chamber, and the first oil filler opening The cross-sectional area of the oil squeeze hole part of the oil tank provided is substantially equal to the cross-sectional area of the oil squeeze hole part of the oil tank provided in the second oil filler port, and the piston slowly moves inside the cylinder. The oil overflowing from the first oil chamber moves to the oil tank provided at the first oil supply port via the oil throttle hole of the oil tank provided at the first oil supply port. And the oil in the oil tank provided in the second oil supply port moves to the second oil chamber through the oil squeezed hole portion of the oil tank provided in the second oil supply port, The displacement of the reinforced embankment wall that squeezes out at an extremely slow speed of about 60 mm during the lapse of about 1 to 3 years is automatically caused by the expansion and non-resistance operation effect of the cylinder and the piston under ultra-low speed. Absorbs and instantaneously protects the protective wall during a typhoon or earthquake When the piston instantaneously moves, the internal pressure of the cylinder is instantaneously increased, and when the movement of the piston is locked, the load acting on the channel is transmitted to the reinforcing embankment wall side, and the protective wall panel is The initial construction position of the protective wall panel is maintained by supporting it safely.

  The connecting member for constructing the decorative covering protective wall of the reinforcing embankment wall according to the present invention is provided with a packing material between the piston rod and the cylinder, and the wall surface of the constructed embankment embedding wall is approximately 1 to 3 years. In conjunction with the squeezing out and ending about 60 mm, the operation of the cylinder and the piston is also ended, and the cylinder, the piston, the piston rod, the packing material, and the oil in the cylinder are deteriorated. By being suppressed, permanent durability can be ensured.

The connecting member for constructing the decorative covering protective wall of the reinforced embankment wall according to the present invention is such that the reinforced earth wall squeezes out at a very slow speed, so that the piston moves through the cylinder at a slow speed. The oil in the oil chamber flows out from the oil leakage passage to the second oil chamber, and the oil overflowing from the second oil chamber moves to the oil tank.
Then, the displacement of the reinforced embankment wall that squeezes out at a very slow speed (about 7μm / h) over the course of one to three years, with the cylinder and piston operating at ultra-low speed without stretching. It absorbs automatically due to the effect, and instantaneously increases the internal pressure of the cylinder by momentarily moving the piston to the load that acts on the protective wall panel in the event of a typhoon or earthquake, and the movement of the piston is locked. By transmitting to the reinforcement embankment wall side, the protective wall panel is safely supported.
Therefore, by providing a connecting member for constructing the decorative covering protective wall of the reinforcing embankment wall between the reinforcing earth wall and the support column, the initial construction position of the protective wall panel can be maintained, and the entire protective wall is inclined forward. In addition to being able to cover the reinforced embankment wall and maintaining the appearance, it is also possible to avoid the possibility that the protective wall panel (protective wall) will collapse.

The connecting member for constructing the decorative covering protective wall of the reinforced embankment wall according to the present invention is such that the reinforced earth wall squeezes out at a very slow speed, so that the piston moves through the cylinder at a slow speed. Oil in the oil chamber moves to the oil tank provided in the first oil supply port through the oil throttle hole of the oil tank provided in the first oil supply port, and is provided in the second oil supply port. The oil inside moves to the second oil chamber through the oil squeezed hole portion of the oil tank provided at the second oil supply port.
Then, the displacement of the reinforced embankment wall that squeezes out at a very slow speed (about 7μm / h) over the course of one to three years, with the cylinder and piston operating at ultra-low speed without stretching. It absorbs automatically due to the effect, and instantaneously increases the internal pressure of the cylinder by momentarily moving the piston to the load that acts on the protective wall panel in the event of a typhoon or earthquake, and the movement of the piston is locked. Thus, the protective wall panel can be safely supported by transmitting to the reinforcing embankment wall side.
Therefore, by providing a connecting member for constructing the decorative covering protective wall of the reinforcing embankment wall between the reinforcing earth wall and the support column, the initial construction position of the protective wall panel can be maintained, and the entire protective wall is inclined forward. In addition to being able to cover the reinforced embankment wall and maintaining the appearance, it is also possible to avoid the possibility that the protective wall panel (protective wall) will collapse.

Furthermore, the connecting member for constructing the decorative covering protective wall of the reinforced embankment wall according to the present invention is provided with a packing material between the piston rod and the cylinder, and the wall surface of the constructed reinforced embankment wall generally passes from 1 to 3 years. The operation of the cylinder and the piston is terminated in conjunction with the squeezing about 60 mm in between. For this reason, it is possible to suppress wear and deterioration of the cylinder, piston, piston rod, packing material, and oil in the cylinder.
Therefore, the permanent durability of the performance of the connecting member for constructing the decorative covering protective wall of the reinforced embankment wall can be ensured.

It is a figure which shows the construction method of the conventional reinforcement embankment wall. (A) Tail Arme Method, (b) Multiple Anchor Method, (c) Geotextile Method It is a figure which shows the result of the loading test of the conventional reinforcement embankment wall. It is a figure which shows the connection member for makeup | decoration covering protection wall construction of the reinforced embankment wall which concerns on 1st embodiment of this invention. It is sectional drawing of the reinforcement embankment wall and protection wall which were constructed | assembled using the connecting member for makeup | decoration covering protection wall construction of the reinforcement embankment wall concerning 1st embodiment of this invention. It is a figure which shows the initial state of the connection member for makeup | decoration coating | cover protective wall construction of the reinforced embankment wall which concerns on 1st embodiment of this invention. It is a figure which shows the action | operation state of the connection member for makeup | decoration covering protection wall construction of the reinforcement embankment wall which concerns on 1st embodiment of this invention. It is a figure which shows the initial state of the connection member for makeup | decoration covering protection wall construction of the reinforced embankment wall which concerns on the modification of 1st embodiment of this invention. It is a figure which shows the initial state of the connection member for makeup | decoration covering protection wall construction of the reinforcement embankment wall which concerns on 2nd embodiment of this invention. It is sectional drawing of the reinforcement embankment wall and protection wall which show the state which the reinforcement embankment wall constructed | assembled using the connecting member for makeup | decoration covering protection wall construction of the reinforcement embankment wall which concerns on embodiment of this invention oozed out.

[First embodiment]
A connecting member 20 for constructing a decorative covering protective wall for a reinforced embankment wall (hereinafter referred to as a connecting member 20) according to the present embodiment is a method for constructing a decorative covering protective wall for a reinforcing embankment wall (hereinafter referred to as a method for constructing a decorative covering protective wall). (FIG. 3 and FIG. 4).
This decorative covering protective wall construction method is to construct a protective wall 7 that protects and protects the wall surface of the reinforcing embankment wall 4 constructed by compacting the embankment material 1 with the reinforcing material 2 interposed therebetween.
And this makeup | decoration covering protective wall construction method attaches the protective wall panel 6 to the support | pillar 5 erected in advance at a predetermined position, and reinforced embankment between the support pillar 5 and the reinforced embankment wall 4 (wall surface material 3). The space | interval more than the overhang | projection dimension of the wall surface of the wall 4 is ensured, the connection member 20 provided with the piston rod 22 and the cylinder 23 is interposed, and the support | pillar 5 and the reinforcement embankment wall 4 (wall surface material) are interposed via the grid belt 11. 3) and the displacement of the reinforced embankment wall 4 that squeezes out at a very slow speed of about 60 mm while the wall surface of the reinforced embankment wall 4 generally passes from 1 year to 3 years. Absorbs automatically due to resistance actuation effect. Further, the load acting on the protective wall panel 6 instantaneously in the event of a typhoon or earthquake is accompanied by the instantaneous increase of the internal pressure of the cylinder 23 due to the instantaneous movement of the piston 21, so that the movement of the piston 21 is in a locked state. By transmitting to 4 side and supporting the protective wall panel 6 safely, the initial construction position of the protective wall panel 6 is maintained.

The connecting member 20 is provided to connect the support column 5 and the reinforcing embankment wall 4 (wall surface material 3). The connecting member 20 is a hydraulic member. For example, silicon lubricant can be used as the oil of the connecting member 20.
As shown in FIG. 3, the connecting member 20 is separated from the first oil chamber 25 by a piston rod 22 provided with a piston 21 at the tip, a first oil chamber 25 having a first oil supply port 24, and the piston 21. The cylinder 23 is provided with a second oil chamber 28 having a second oil supply port 27 and provided with an oil tank 26 having an oil throttle hole 33 in the second oil supply port 27.
An O-ring 43 (packing material) is provided on the outer periphery of the piston 21, and the O-ring 43 is interposed between the piston 21 and the cylinder 23. Between the O-ring 43 and the cylinder 23, there is an oil leakage passage 29 that is a small gap.

  A packing material (seal material) 40 is provided between the piston rod 22 and the cylinder 23. A connection hole 30 is formed at the tip of the cylinder 23, and a connection hole 31 is formed at the tip of the piston rod 22.

  The oil tank 26 includes a tank portion 32 that is open at the top, a mounting portion 34 that has an oil throttle hole portion 33 that communicates with the tank portion 32, and a screwed lid portion 35 that is provided in the opening portion of the tank portion 32. I have. The oil tank 26 is connected to the cylinder 23 by fitting the mounting portion 34 to the second oil supply port 27.

Next, a method for constructing a decorative covering protective wall using the connecting member 20 according to the present embodiment will be described.
FIG. 4 shows a cross section of the reinforced embankment wall 4 and the protective wall 7 constructed by the decorative covering protective wall construction method using the connecting member 20 according to the present embodiment.
First, a metal frame material (not shown) is installed, the embankment 1 (embankment material) is spread, and the reinforcing material 2 is attached in the front-rear direction X. As the reinforcing material 2, for example, a strip-shaped steel material, a rod-shaped steel material, a mesh-like steel material made of a synthetic polymer (a grid-shaped reinforcing material in which aramid fibers are covered with polyethylene), or the like can be used.
After attaching the reinforcing material 2, the embankment 1 is further spread in the height direction Y. In addition, the grid belt 11 is provided at a predetermined interval so that the tip thereof protrudes forward from the side surface of the embankment 1. The grid belt 11 is a belt-shaped reinforcing material, and a connection portion is formed at the tip portion.
This work is repeated until the desired height is reached, and the embankment wall is constructed. Then, the reinforced embankment wall 4 is constructed by attaching the wall surface material 3 to the front surface of the embankment wall (completion of foundation work). The grid belt 11 protrudes forward from the wall surface material 3.

Next, the column 5 is erected in front of the wall material 3 with a predetermined interval. And the protective wall panel 6 is attached to the support | pillar 5, the protective wall (decoration covering protective wall) 7 is constructed | assembled in the whole surface of the reinforcement embankment wall 4, and the reinforcement embankment wall 4 is cosmetically covered. For example, the protective wall panel 6 having a length in the height direction Y of 200 mm to 300 mm can be used. In this embodiment, the protection wall panel 6 has shown the example using the length of 300 mm in the height direction.
The predetermined interval means an interval equal to or larger than the protruding dimension of the wall surface of the reinforcing embankment wall 4 from the reinforcing embankment wall 4.

After constructing the protective wall 7, as shown in FIG. 5, the bolt 9 is tightened through the connection hole 30, the column 5 and the cylinder 23 are coupled, and the bolt 10 is tightened through the connection hole 31. The grid belt 11 and the piston rod 22 are connected. At this time, the cylinder 23 is connected so that the first oil supply port 24 and the second oil supply port 27 face upward.
A plurality of connecting members 20 are provided in the height direction Y and the depth direction, and the number and connection positions thereof can be changed as appropriate.

After connecting the connecting member 20, oil is injected into the first oil chamber 25 and the second oil chamber 28 from the first oil supply port 24 and the second oil supply port 27. At this time, an amount of oil that almost fills the first oil chamber 25 and the second oil chamber 28 is injected.
Then, a plug (bolt) 36 is attached to the first oil supply port 24, and an oil tank 26 is attached to the second oil supply port 27. Then, the oil tank 26 is filled with a predetermined amount of oil and sealed with a screwed lid portion 35.
In addition, after attaching the oil tank 26, the oil tank 26 can be filled with oil through the oil tank 26, or the oil tank 26 filled with a predetermined amount of oil can be attached.

Next, the effect of the connection member 20 according to the present embodiment will be described.
It is known that a reinforced embankment will squeeze out about 3 to 6 cm forward in one year. When this is converted into a speed, it becomes about 7 μm / h. Therefore, the wall surface material 3 of the reinforcing embankment wall 4 gradually swells forward at an extremely slow speed.
An oil leakage passage 29 is formed between the cylinder 23 and the piston 21 used in the present embodiment, and oil flows out from the oil leakage passage 29 so as to ooze out.
The wall material 3 of the reinforcing embankment wall 4 squeezes out at about 7 μm / h, and the piston rod 22 moves as shown in FIG. 6 so that the oil in the first oil chamber 25 gradually enters the second oil chamber 28. leak. When the piston rod 22 moves so that the volume of the first oil chamber 25 is reduced, the volume in the cylinder 23 is reduced by the volume of the piston rod 22 that enters the cylinder 23.
Therefore, by flowing out from the first oil chamber 25 to the second oil chamber 28, the oil in the second oil chamber 28 passes through the oil throttle hole 33 and moves to the oil tank 26.

It is known that the reinforced embankment spills out about 3 cm to 6 cm forward in one year. When this is converted into a speed, it becomes about 7 μm / h. Therefore, the wall surface material 3 of the reinforcing embankment wall 4 gradually swells forward at an extremely slow speed. Since the wall material 3 squeezes out very slowly, the speed at which oil flows out from the first oil chamber 25 to the second oil chamber 28 is extremely small, and no pressure is generated between the cylinder 23 and the piston 21.
An oil leakage channel 29 exists between the cylinder 23 and the piston 22 of the connecting member 20 of the present embodiment, and the oil leaks so that the oil leaks out from the oil leakage channel 29. As described above, the wall material 3 of the reinforcing embankment wall 4 squeezes out at about 7 μm / h, and the piston 6 expands and contracts, so that oil leaks little by little and no pressure is generated between the cylinder 8 and the piston 6. That is, the piston 6 expands and contracts in a non-resistance state and operates. In the present embodiment, the above effect is referred to as “stretching / non-resistance operation effect”.

When the wall surface material 3 (reinforcement embankment wall 4) swells forward, the displacement from the reinforcement embankment wall 4 is transmitted to the cylinder 23. If it does so, it will absorb automatically by the expansion / contraction resistanceless action effect under the super-low-speed of the cylinder 23 and the piston 21, and this displacement will hardly be transmitted to the protection wall panel 6. FIG.
Therefore, the protective wall panel 6 is maintained in the initial constructed state (position).
Since the protection wall panel 6 is maintained in the initial built state, the entire protection wall 7 is prevented from being tilted forward, the reinforced embankment wall can be covered with a makeup, and the appearance can be maintained. The possibility that the panel 6 (protective wall 7) collapses can be avoided.

Moreover, a load may be applied to the protective wall panel 6 (protective wall 7) from the front-rear direction X due to a typhoon or an earthquake.
When a load is applied to the protective wall panel 6 from the front-rear direction X, the cylinder 23 moves in the front-rear direction X. In the connecting member 20 according to this embodiment, the oil does not move suddenly from the second oil chamber 28 to the oil tank 26, and the cylinder 23 is accompanied by an instantaneous increase in the internal pressure of the cylinder 23 due to the instantaneous movement of the piston 21. The movement of the piston 21 is restricted, and the piston 21 is locked. When the movement of the piston 21 is locked, the load on the protective wall panel 6 is transmitted to the reinforcing embankment wall 4 side, and the protective wall panel 6 can be safely supported.
Then, the entire protective wall 7 is prevented from being tilted forward, the reinforced embankment wall can be covered with cosmetics, the appearance can be maintained, and the possibility that the protective wall panel 6 (protective wall 7) will collapse is avoided. it can.

A packing material 40 is provided between the cylinder 23 and the piston rod 22, but a minute gap exists between the packing material 40 and the piston rod 22. Therefore, the oil in the second oil chamber 28 may leak outside through the gap.
In the connecting member 20 of the present embodiment, an oil tank 26 filled with a predetermined amount of oil is connected to the second oil chamber 28. Therefore, even when oil leaks outside from the second oil chamber 28 through the gap between the packing material 40 and the piston rod 22, the oil is replenished from the oil tank 26 into the second oil chamber 28. .
Therefore, the function can be maintained for a long time without losing the function of the connecting member 20.

  Silicon oil can be used as the oil to be injected (filled) into the cylinder 23 of the connecting member 20 of the present embodiment. Silicon lubricating oil is less likely to deteriorate and has higher durability than ordinary oil. Therefore, the permanent durability of the connecting member 20 can be ensured by filling the silicon lubricating oil.

Further, as shown in FIG. 9, the connecting member 20 is interlocked with the wall of the constructed reinforced embankment wall that squeezes out about 60 mm and ends within approximately one to three years. Since the oil 23 in the cylinder 23, the piston rod 22, the O-ring 43 (packing material), and the oil in the cylinder 23 is prevented from being deteriorated, the permanent durability of the connecting member 20 can be ensured.
In the connecting member 20, the inside and outside of the cylinder 23 are blocked by the plug material 36, the oil tank 26, and the packing material 40, and the inside of the cylinder 23 is sealed, so that the O-ring 43 (packing material) and the piston rod 22 are sealed. Further, it is possible to prevent the oil or the like in the cylinder 23 from deteriorating, and the permanent durability of the connecting member 20 can be further ensured.

  In the decorative covering protective wall construction method using the connecting member 20 according to the present embodiment, it is not necessary to fill crushed stone between the protective wall panel 6 and the reinforcing embankment wall 4, and thus the protective wall panel 6 and the reinforcing embankment wall 4. As compared with the case where crushed stone is filled between the protective wall 7 and the protective wall 7 can be constructed at a low cost.

When the crushed stone is filled between the protective wall panel and the reinforced embankment wall as in the conventional method of constructing the protective wall, the load from the reinforced embankment wall is protected through the crushed stone layer that has been filled and constructed. Join the panel.
In the decorative covering protective wall construction method using the connecting member 20 according to the present embodiment, since the crushed stone is not filled between the protective wall panel 6 and the reinforcing embankment wall 4, the load from the reinforcing embankment wall 4 is protected. It does not join the wall panel 6. Therefore, the protection wall panel 6 can maintain the initial constructed state, and the protection wall panel 6 can be safely supported. Moreover, since the space formed between the protective wall panel 6 and the wall surface material 3 functions as a discharge path, drainage is good.

[Modification]
The connecting member 20 according to the modification of the present embodiment is different from the connecting member 20 of the first embodiment in that an oil leakage channel 29 is formed in the piston 21. Hereinafter, a description will be given centering on a portion different from the connecting member 20 according to the modification of the first embodiment.
As shown in FIG. 7, a through hole 42 is formed in the piston 21 constituting the connecting member 20 as an oil leakage passage 29 that penetrates the piston 21 and communicates the first oil chamber 25 and the second oil chamber 28. Has been. For example, when the diameter of the piston 21 is 80 mm, the diameter of the through hole 42 is about 3 mm (2 mm to 4 mm). Further, the through hole 42 is designed so that its cross-sectional area is substantially equal to the cross-sectional area of the oil throttle hole 33 of the oil tank 26.

Next, the effect of the connection member 20 according to a modification of the present embodiment will be described.
The piston 21 used in the present embodiment has a through hole 42 (oil leakage passage 29), and oil flows out from the first oil chamber 25 to the second oil chamber 28 through the through hole 42. To do. Then, the oil in the second oil chamber 28 passes through the oil throttle hole 33 and moves to the oil tank 26.
Therefore, even if there is no oil leakage channel 29 between the O-ring 43 and the cylinder 23, the connection member 20 of the modified example of the present embodiment is used, so that the cylinder 23 and the piston 21 can be operated at an extremely low speed. The protective wall panel 6 is maintained in the initial built state (position) by automatically absorbing due to the expansion / contraction resistanceless operation effect.

[Second Embodiment]
20 A of connecting members which concern on this embodiment carry out cosmetic covering protection of the wall surface of the reinforced embankment wall 4 constructed | assembled by interposing the reinforcing material 2 in the embankment material 1 like the connecting member 20 of 1st embodiment. Reinforced embankment is used between a support column 5 and a reinforcing embankment wall 4 that are used in a method for constructing a decorative covering protective wall of a reinforced embankment wall that constructs a protective wall, and is erected in advance at a predetermined position and attached with a protective wall panel 6. It is provided with an interval that is larger than the protruding dimension of the wall surface of the wall 4.
As shown in FIG. 8, the connecting member 20 </ b> A has a piston rod 22 provided with a piston 21 at the tip and a first oil supply port 24, and an oil throttle hole 53 at the first oil supply port. Oil having a first oil chamber 25 provided with an oil tank 56 and a first oil chamber 25 separated by a piston 21, having a second oil supply port 27, and having an oil throttle hole 33 in the second oil supply port 27. And a cylinder 23 having a second oil chamber 28 provided with a tank 26.
The oil tank 26 and the oil tank 56 are larger in volume than the oil tank 26 used in the first embodiment.

The oil tank 56 has the same configuration as that of the oil tank 26 attached to the second oil supply port 27, and has a tank portion 52 having an open top, an attachment portion 54 having an oil throttle hole portion 53 communicating with the tank portion 52, And a screwed lid portion 55 provided at the opening of the tank portion 32. The oil tank 56 is connected to the cylinder 23 by fitting the mounting portion 54 to the first oil supply port 24. The cross-sectional area of the oil squeeze hole 53 of the oil tank 56 is designed to be substantially equal to the cross-sectional area of the oil squeeze hole 33 of the oil tank 26 provided in the second oil supply port 27.
Filling the cylinder 23 with oil can be performed in the same manner as in the first embodiment.

In the connecting member 20 </ b> A according to the present embodiment, when the wall material 3 of the reinforcing embankment wall 4 squeezes out at about 7 μm / h, the first oil chamber is obtained when the piston 21 moves at a slow speed inside the cylinder 23. The oil overflowing from the inside 25 moves to the oil tank 56 provided in the first oil supply port 24 through the oil throttle hole 53 of the oil tank 56 provided in the first oil supply port 24, and the second oil supply The oil in the oil tank 26 provided at the port 27 moves to the second oil chamber 28 through the oil throttle hole 33 of the oil tank 26 provided at the second oil supply port 27.
Since the wall material 3 oozes out very slowly, the speed at which the oil moves from the first oil chamber 25 to the oil tank 56 is extremely low, and no pressure is generated between the cylinder 23 and the piston 21. Therefore, the displacement of the reinforced embankment wall 4 is automatically absorbed by the expansion and contraction resistanceless operation effect under the ultra-low speed of the cylinder 23 and the piston 21, and this displacement is hardly transmitted to the protective wall panel 6. Therefore, the protective wall panel 6 can be maintained in the initial built state (position).

Furthermore, since the oil in the oil tank 26 moves to the second oil chamber 28, the oil can be filled into the second oil chamber 28 whose volume is increased by the movement of the piston rod 22. Further, since the cross-sectional area of the oil squeeze hole 53 of the oil tank 56 is designed to be substantially equal to the cross-sectional area of the oil squeeze hole 33 of the oil tank 26, the oil that moves from the first oil chamber 25 to the oil tank 56. And the amount of oil moving from the oil tank 26 to the second oil chamber 28 is substantially equal.
Then, even when a load is applied to the protective wall panel 6 (protective wall 7) from the front-rear direction X due to a typhoon or an earthquake, the oil suddenly moves from the first oil chamber 25 to the oil tank 56, or the oil tank 26 The oil does not move suddenly from the first oil chamber 28 to the second oil chamber 28, and the cylinder 23 is restricted from moving as the internal pressure of the cylinder 23 is instantaneously increased due to the instantaneous movement of the piston 21, and is locked. It becomes. When the movement of the piston 21 is locked, the load on the protective wall panel 6 is transmitted to the reinforcing embankment wall 4 side, and the protective wall panel 6 can be safely supported.
Therefore, by using the connecting member 20A according to the present embodiment, the entire protective wall 7 is prevented from being tilted forward, the reinforced embankment wall can be cosmetically covered, and the appearance can be maintained. In addition, the protective wall panel The possibility of collapse of 6 (protective wall 7) can also be avoided.

  Although the present embodiment has been described above, the configuration described in the above embodiment can be selected or changed to other configurations as appropriate without departing from the gist of the present invention. .

1 Filling (filling material)
2 Reinforcing Material 3 Wall Material 4 Reinforced Embankment Wall 5 Strut 6 Protective Wall Panel 7 Protective Wall (Coating Wall)
9, 10 Bolt 11 Grid belt 20, 20A Connecting member 21 Piston 22 Piston rod 23 Cylinder 24 First oil supply port 25 First oil chamber 26 Oil tank 27 Second oil supply port 28 Second oil chamber 29 Oil leak passages 30, 31 Connection hole 32 Tank portion 33 Oil throttle hole portion 34 Mounting portion 35 Screwed lid portion 36 Plug member (bolt)
40 Packing material (seal material)
42 Through hole 43 O-ring (packing material)
52 Tank part 53 Oil throttle hole part 54 Mounting part 55 Threaded cover part 56 Oil tank X Front-rear direction Y Height direction

Claims (3)

It is used in a method for constructing a decorative covering protective wall for a reinforced embankment wall that builds a protective wall that protects the wall surface of a reinforced embankment wall that is constructed by interposing a reinforcing material in the embankment material and standing in place in advance. Construction of a decorative covering protective wall for a reinforced embankment wall, which is provided between the support column to which the protective wall panel is attached and the reinforced embankment wall with a space larger than the protruding dimension of the wall surface of the reinforced embankment wall. Connecting member for
A piston rod provided with a piston at the tip;
A first oil chamber having a first oil supply port, a chamber separated from the first oil chamber by the piston, has a second oil supply port, and an oil tank having an oil throttle hole is provided at the second oil supply port. A cylinder having a second oil chamber,
An oil leakage channel exists in the gap between the piston and the cylinder, or a through hole is provided in the piston to form an oil leakage channel that connects the first oil chamber and the second oil chamber,
When the piston moves through the cylinder at a slow speed, the oil in the first oil chamber flows out from the oil leakage passage into the second oil chamber and overflows from the second oil chamber. When the oil has moved to the oil tank through the oil squeeze hole,
The displacement of the reinforced embankment wall that squeezes out at an extremely slow speed of about 60 mm during the lapse of about 1 to 3 years is automatically caused by the expansion and non-resistance operation effect of the cylinder and the piston under ultra-low speed. Absorb,
And, the load acting on the protective wall panel instantaneously in the event of a typhoon or earthquake causes the internal pressure of the cylinder to be instantaneously increased by instantaneous movement of the piston, and the movement of the piston is locked, thereby reinforcing the reinforcement. By transmitting to the embankment wall side and supporting the protective wall panel safely, the initial construction position of the protective wall panel is maintained.
A connecting member for constructing a decorative covering protective wall for a reinforced embankment wall. It is used in a method for constructing a decorative covering protective wall for a reinforced embankment wall that builds a protective wall that protects the wall surface of a reinforced embankment wall that is constructed by interposing a reinforcing material in the embankment material and standing in place in advance. Construction of a decorative covering protective wall for a reinforced embankment wall, which is provided between the support column to which the protective wall panel is attached and the reinforced embankment wall with a space larger than the protruding dimension of the wall surface of the reinforced embankment wall. Connecting member for
A piston rod provided with a piston at the tip;
A first oil chamber, a first oil chamber provided with an oil tank having an oil squeeze hole, and the first oil chamber separated from the first oil chamber by the piston; The second oil filler port is provided with a cylinder having a second oil chamber in which an oil tank having an oil throttle hole is provided in the second oil filler port,
The cross-sectional area of the oil squeeze hole part of the oil tank provided in the first oil supply port is substantially equal to the cross-sectional area of the oil squeeze hole part of the oil tank provided in the second oil supply port,
When the piston moves through the cylinder at a slow speed, the oil that overflows from the first oil chamber passes through the oil throttle hole of the oil tank provided in the first oil filler port. The oil squeezing hole portion of the oil tank provided in the second oil supply port moves to an oil tank provided in the first oil supply port, and the oil in the oil tank provided in the second oil supply port The displacement of the reinforced embankment wall that squeezes out at a very slow speed of about 60 mm while the wall surface of the reinforced embankment has passed from about 1 year to 3 years is caused by the movement of the cylinder and the piston. Absorbs automatically due to the expansion and contraction resistance operation effect under ultra-low speed,
And, the load acting on the protective wall panel instantaneously in the event of a typhoon or earthquake causes the internal pressure of the cylinder to be instantaneously increased by instantaneous movement of the piston, and the movement of the piston is locked, thereby reinforcing the reinforcement. By transmitting to the embankment wall side and supporting the protective wall panel safely, the initial construction position of the protective wall panel is maintained.
A connecting member for constructing a decorative covering protective wall for a reinforced embankment wall. A packing material is provided between the piston rod and the cylinder,
In conjunction with the wall of the constructed reinforced embankment squeezing about 60 mm and ending within approximately one to three years, the operation of the cylinder and the piston is also terminated.
The cylinder, the piston, the piston rod, the packing material, and the oil in the cylinder are prevented from deteriorating, thereby ensuring permanent durability.
The connecting member for constructing a decorative covering protective wall for a reinforcing embankment wall according to claim 1 or 2.