JP2000297403A - Passage and construction method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a passage and a construction method for the passage capable of being easily constructed at a low cost within a short period of time and being installed by largely projecting to a valley side without so much hindering traffic in the existing road or the like. SOLUTION: As a retaining wall, for example, footings 21 are formed at an appropriate interval to erect struts 22, a wall slab 23 is provided between the struts 22 to construct the retaining wall. While, an anchor weight 24 is installed to a stable ground on a mountain side rather than the retaining wall, and a tie-bar 25 connects between the anchor weight 24 and retaining wall (struts 22). A floor board 26 is mounted on the retaining wall. The upper surface of the floor board 26 is used as a passage. The floor board 26 can be largely projected to a valley by designs of the anchor weight 24 and tie-bar 25. For example, even when the passage adjoining a road is constructed on the valley side, the traffic on the road can be only controlled at a short distance and in a short time for intalling the anchor weight 24 and tie-bar 25 on the road.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passage provided on a slope or the like and a method for constructing the passage.

[0002]

2. Description of the Related Art In recent years, sloping land has been increasingly used to effectively utilize land. Because it is difficult to secure flat land on sloping land, only narrow roads are often provided. However, as traffic increases, pedestrian safety cannot be ensured on narrow roads. For this reason, a pedestrian passage is provided on the sloped road,
It is conceivable to ensure the safety of pedestrians. On the other hand, on slopes, the scenery is good, and if it is possible to secure a passage where people can stroll safely, it is also advantageous in terms of tourism.

[0003] However, when a road is already provided on a slope as described above, large-scale construction is required to further secure a passage for pedestrians. One method is to cut down the slope on the mountain side of the road and construct a new retaining wall to secure a passage. However, on sloping land, the mountain side is often already cut when passing through the road, in which case the existing retaining wall is demolished, the slope is largely cut, and a new retaining wall is constructed. Is required. In addition, such construction will greatly alter the terrain on the mountain side, and will have a significant effect on the natural environment.

[0004] As another method, there is a method in which a retaining wall is constructed on a slope on the valley side of a road, and a portion up to the wall surface of the retaining wall is used as a road or a passage for pedestrians. FIG. 12 is an explanatory diagram of an example of a conventional passage construction method. In the figure, 1 is a bottom plate, 2 is a vertical plate, 3 is a backfill part, 4 is a road, and 5 is a passage. As shown in FIG. 12A, a road 4 is laid on a slope. When providing a passage on the valley side of this road 4,
First, as shown in FIG. 12B, a part of the road 4 and a part serving as a passage are largely cut off. Thereafter, as shown in FIG. 12C, an L-shaped retaining wall composed of the bottom plate 1 and the vertical plate 2 is constructed and backfilled. The retaining wall constructed in this way is stabilized by the bottom slab 1 receiving the weight of the earth and sand in the backfill portion 3. After that, the shaved portion of the road 4 and the passage 5 may be provided above the backfill portion 3.

However, in order to perform such construction,
In order to partially cut off the existing road 4, it is necessary to partially restrict road traffic. Such a retaining wall has at least several tens
Since it cannot be constructed until it is built in m units and backfilled, it restricts long-distance and long-term traffic. This causes traffic congestion and increases the risk of accidents. Further, there is a case in which the construction itself cannot be performed on a narrow road without a detour nearby because the road cannot be closed.

Further, since the backfilling section 3 is different from the original stable ground and is transformed into an unstable ground, the backfilling section 3 causes uneven settlement and the upper road 4 and the passage 5
There were problems such as unevenness and depression, and the retaining wall itself was inclined. In addition, as described above, large-scale excavation, construction of retaining walls, and backfilling require large-scale construction.
There was also a problem that a lot of labor, cost and time were required.

[0007] As a method of constructing a retaining wall at low cost by reducing the above-mentioned alteration of the ground mainly in residential land and the like,
There is a method described in Japanese Patent Publication No. 2-40806. FIG. 13 is a cross-sectional view of another example of the conventional method of constructing a retaining wall, and FIG. 14 is a plan view of the same. In the drawing, 11 is an anchor bar receiver, 12 is an anchor bar, and 13 is a retaining wall. In this construction method, first, a hole for providing the anchor bar receiver 11 and a groove for providing the anchor bar 12 are excavated in the stable ground on the mountain side. Then, the anchor bar receiver 11 is cast, the anchor bar 12 is stretched between the retaining wall 13 and the anchor bar receiver 11, and the anchor bar 12 is buried back.

[0008] In this method, the stable ground is not greatly modified, so that the ground can be used as it is, and irregular settlements and the like are extremely unlikely to occur. Further, since the anchor bar receiver 11 and the anchor bar 12 are held by the stable ground, the retaining wall 13 is strongly supported. Further, the construction is simple, and the construction can be performed in a short period of time at low cost.

Although this method is used in the present invention, the above-mentioned literature mainly considers a retaining wall constructed when a structure such as a residential land is constructed on an inclined land, but the retaining wall constructed in this manner is used. It was not intended to use the upper part as a passage. Therefore, when providing a passage, a retaining wall must be constructed on the valley side more than the width of the passage. For this reason, it is necessary to construct a retaining wall from the bottom of the valley on the sloped land, and there is a drawback that the height of the retaining wall needs to be increased and the strength must be increased accordingly.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and can be carried out systematically according to traffic conditions without significantly hindering traffic on existing roads and the like. It is an object of the present invention to provide a passage which can be easily and inexpensively constructed in a short period of time, and which can be installed so as to protrude greatly to the valley side and a method of constructing the passage.

[0011]

According to the present invention, in a passage, a retaining wall portion, an anchor weight provided on a stable ground on a mountain side of the retaining wall portion, and an anchor weight provided between the anchor weight and the retaining wall portion are provided. And a floor plate portion provided on the retaining wall portion and at least partially protruding toward the valley side from the retaining wall portion. As a construction method for constructing such a passage, while forming a retaining wall portion, excavating a groove extending from the retaining wall portion to the mountain side, providing an anchor weight at the mountain side end of the groove, In the groove, the anchor weight and the retaining wall are connected by a tie bar and backfilled to form a floor plate at least partially protruding from the retaining wall toward the valley side above the retaining wall. It is a feature.

[0012] For example, even when a passage is provided adjacent to an existing road, only a small groove for an anchor weight and a tie bar is excavated on the road side. In a short time. Therefore, it has little effect on road traffic. In addition, since the anchor weight is provided on the stable ground without excavating greatly, the original strong ground can be utilized and utilized. Therefore, a sufficient supporting force by the anchor weight and the tie bar can be obtained, and sufficient strength can be maintained as the retaining wall even if the floor plate portion provided on the retaining wall is greatly extended to the valley side.

Further, when an existing retaining wall is present,
A retaining wall portion can be provided on the mountain side from the existing retaining wall. As a result, even if the existing retaining wall is aging or is about to collapse due to inadequate construction, for example, the existing retaining wall must be demolished and reconstructed without performing major construction work such as rebuilding. Installation and replacement of retaining walls will be possible. It also has the role of protecting the earth pressure on the aging existing retaining wall.

The floor plate portion and the retaining wall portion may be formed separately and fixed to each other, or may be formed integrally.

[0015]

FIG. 1 is a sectional view showing a first embodiment of a passage according to the present invention, and FIG. 2 is a plan view of the same.
In the figure, 21 is a foundation, 22 is a support, 23 is a wall slab, 24 is an anchor weight, 25 is a tie bar, and 26 is a floor panel.
Although the retaining wall may have any structure, here, as an example, a pile-shaped foundation 21 is formed at an appropriate interval, and a support 22 made of H-shaped steel or the like is erected. A wall plate 23 is provided between the columns 22 using a PC plate or the like, thereby constructing a retaining wall.

On the other hand, an anchor weight 24 is installed on the stable ground on the mountain side of the retaining wall, and the anchor weight and the retaining wall (post 22) are connected by a tie bar 25. Anchor weight 2
4 can be made of, for example, reinforced concrete or piles. The tie bar 25 is, for example, a retaining wall (support 2
One or more wires may be stretched between 2) and the anchor weight 24, or the aggregate may be fixed at both ends, and the wire or the aggregate may be solidified with concrete or the like. Furthermore, PC version is used for retaining wall (post 22)
And anchoring to the anchor weight 24.

Further, a floor plate 26 is provided on the retaining wall. The floor plate 26 serves as a passage. The floor plate 26 can be installed so as to project more toward the valley side than the retaining wall. In this example, the floor plate 26 is formed separately from the retaining wall, and the strut 22 and the wall slab 2
3 is fitted and fixed. Due to this fitting and fixing,
For example, a convex portion can be provided on the rear surface of the floor plate 26 so as to sandwich the wall plate 23 and the support 22. The wall plate 23 and the support 22 and the floor plate 26 can be fitted between the convex portions, and a through hole can be provided in the convex portion to be fixed with a bolt or the like. Alternatively, a recessed portion into which the wall slab 23 and the column 22 fit may be provided on the back surface of the floor plate 26, and both may be fitted together. Alternatively, both may be fixed using a substantially L-shaped reinforcing material. Further, substantially triangular braces may be provided continuously or interspersed to fix and reinforce both.
On the surface side of the floor panel 26, it is preferable that various additional structures such as a fence provided on a valley side, a lighting facility, and the like can be attached. In addition, various deformations are possible, such as being provided with a drainage ditch or the like.

In the above configuration, when the floor plate 26 is installed so as to protrude more toward the valley side than the wall slab 23,
Due to its own weight and the load applied to the floor plate 26, the retaining wall receives a moment force on the valley side. Further, the retaining wall receives a force in the direction toward the valley due to the difference in magnitude between the earth pressure on the mountain side and the earth pressure on the valley side. However, since the anchor weight 24 is installed on the stable ground and the anchor weight 24 and the retaining wall are connected by the tie bar 25, the anchor weight 24
, And the frictional force and the earth pressure that the tie bar 25 receives from the surroundings can counter the force applied to the retaining wall as described above. It is also possible to increase the supportable force by the shape, structure and weight of the anchor weight 24 and the shape, structure and length of the tie bar 25. The anchor weight 24 and the tie bar 25 can be appropriately designed according to the weight of the floor plate 26, the load applied to the floor plate 26, the height of the retaining wall, the earth pressure applied to the retaining wall, and the like.

The retaining wall can be arbitrarily configured as described above. For example, the foundation 21 can be an arbitrary foundation construction such as a pile-type foundation or a concrete block extending below the wall slab 23. The wall slab 23 can be made of reinforced concrete or the like in addition to the PC slab. Furthermore, a method may be used in which the entire retaining wall is made of reinforced concrete without providing the special columns 22 such as the H-shaped steel as described above.

FIG. 3 is a sectional view showing a second embodiment of the passage of the present invention. The reference numerals in the drawings are the same as those in FIGS. This example shows an example in which the wall slab 23 and the floor slab 26 are integrally formed. In this example, the wall slab 23 and the floor slab 2
Since the strength at the connecting portion with the passage 6 can be sufficiently maintained, the maximum load on the passage can be increased. As a method of integrally configuring the wall slab 23 and the floor slab 26, for example, a reinforced concrete method can be used, or a molded product using a predetermined mold such as PC concrete can be supplied. It is.

In the example shown in FIG.
Shows an example using a substantially triangular PC plate. By using the tie bar 25 having such a shape, the weight of the tie bar 25 can be increased and the frictional force around the tie bar 25 can be increased, so that the passage can be further stabilized. In addition, depending on the slope, even if the tie bar 25 has such a shape, the tie bar 25 can be installed without much excavation.

Next, several examples of a method of constructing such a passage will be described. 4 to 8 are explanatory views of a first example of the method for constructing a passage according to the present invention. In the figure, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. 31 is a road, 32 is an anchor receiving hole, and 33 is a tie bar groove. (A) of each figure shows a sectional view,
The figure (B) has shown the top view. Here, FIGS. 1 and 2
The construction method in the case where the passage having the structure shown in FIG. 1 is provided on the valley side of the road provided on the sloped land will be described.

First, as shown in FIG. 4, holes for providing foundations at predetermined intervals are excavated on the valley side of a road 31 where a passage is provided.
After the pillars 22 are built, concrete is cast to form the foundation 21. Of course, various construction methods such as driving a pile into the foundation 21 may be used. In this case, pillar 2
As H, an H-shaped steel or the like can be used. At this time, the predetermined interval at which the foundation 21 and the support 22 are provided may be, for example, about 2 to 3 m.

Next, as shown in FIG. 5, an anchor receiving hole 32 for providing the anchor weight 24 on the stable ground is excavated on the mountain side, and the anchor receiving hole 32 and the support column 2 are further excavated.
A groove-shaped tie bar groove 33 is excavated between the two. Then, as shown in FIG. 6, the anchor weight 24 is formed in the excavated anchor receiving hole 32. For example, it can be formed by placing a pile or pouring concrete. Then, the tie bar 25 is provided in the tie bar groove 33. For example, the tie bar 25 can be provided by connecting the anchor weight 24 and the support 22 with a wire or a reinforcing bar and hardening them with concrete, or connecting the anchor weight 24 and the support 22 with a PC plate. . After the tie bar 25 is provided, the tie bar groove 33 and the anchor receiving hole 32 are filled back. A simple pavement may be provided on the road 31. Thus, FIG.
As shown in (1), one anchor weight 24 and one tie bar 25 can be installed.

The above-described construction of the anchor weight 24 and the tie bar 25 excavates the existing road 31, which is an obstacle to traffic. However, the anchor receiving hole 32 and the tie-bar groove 33 have a width of only several tens cm to 1 m at most, and a section for regulating traffic is very short. Also, one anchor weight 24 and tie bar 2
Since the construction of No. 5 does not take much time, it is possible to adaptively change the construction schedule, such as avoiding days with heavy traffic. In particular, for example, as shown in FIG.
In the case of using a plate, the work is completed in a very short time. In addition, the excavation of the anchor receiving hole 32 and the installation of the anchor weight 24 and the excavation of the tie bar groove 33 and the installation of the tie bar 25 can be performed separately, and the influence on traffic can be further reduced.

Further, since the widths of the anchor receiving hole 32 and the tie bar groove 33 to be excavated are narrow, it is possible to pass the road after excavation by covering it with an iron plate or the like. For example, even if excavation of the anchor receiving hole 32 and the tie bar groove 33 to construction of the anchor weight 24 and the tie bar 25 are not continuously performed, the road 31 can be once passed after the excavation. Also, for example, if the tie bar 25 is lengthened and a trench is excavated to the opposite lane, it is sufficient to cover the top after excavating one lane and excavate the opposite lane, and it is possible to construct without completely blocking traffic It is. The excavation of the anchor receiving hole 32 and the tie-bar groove 33 may be, for example, at a depth of about 1 m. Therefore, even if traffic is restricted during excavation, there is an advantage that it can be performed in a very short time.

Such anchor weights 24 and tie bars 25 are provided corresponding to each of the columns 22 or every other or every other column. At this time, the anchor weight and the tie bar 25 can be constructed one by one as described above, or all or some of the anchor receiving holes 32 and the tie bar grooves 33 are excavated first, and thereafter, Anchor weight 24 and tie bar 25
Can be formed.

Thereafter, as shown in FIG. 7, a wall slab 23 is provided between the columns 22. For example, in the case of the PC version, the support 22
Just drop it in the middle. In the case of reinforced concrete, it is sufficient to assemble a reinforcing bar, provide a formwork, and pour the concrete. Then, back-filling is performed on the back side of the wall slab 23.

Further, as shown in FIG. 8, a floor plate 26 is fitted on and fixed to the wall slab 23 and the column 22 to complete the passage. In addition, as shown in FIG. 3, when the wall slab 23 and the floor plate 26 are integrally molded, for example, when a PC molded product is used,
By simply dropping it between the columns 22, the passage portion is completed.
Also, for example, when the wall slab 23 is constructed of reinforced concrete or the like, the floor plate 26 can be integrally constructed. In this case, the tie bar 25, the anchor weight 24, and the like can be integrally formed by connecting the reinforcing bars. In addition, various auxiliary facilities, such as a fence and a lighting device, can be installed in the completed passage. Also, the floor plate 26 can be variously deformed, such as further stacking plate materials. The road surface of the road 31 excavated in a groove shape is preferably paved again.

In this way, a passage can be constructed on the valley side of the existing road 31. As described above, when this passage is constructed, the anchor receiving hole 32 and the tie bar groove 33 are excavated on the road 31 and the anchor weight 2 is inserted therein.
Since only the steps of forming the tie bar 4 and the tie bar 25 are performed, the construction is very simple, and the construction can be performed without obstructing the traffic on the road 31 so much. In addition, the design of the anchor weights 24 and the tie bars 25 makes it possible to protrude the passage portion more greatly toward the valley side than the wall slab 23, and secures a wide passage and separates the passage from the existing road 31 to ensure safety. Can be secured.

In this example, the anchor weights 24 are provided individually. However, multiple tie bars 2
5, a continuous anchor weight 24 can be provided. In this case, when the anchor weight 24 is formed by excavating the groove along the road 31 at the center line portion or the roadside zone on the mountain side of the road 31, for example, the construction can be performed without much hindrance to traffic. In the case where the anchor weight 24 is provided on the roadside zone on the mountain side of the road 31, the width of the road can be effectively used by, for example, providing the anchor weight 24 below a gutter.

FIGS. 9 to 11 are explanatory views of a second example of the method for constructing a passage according to the present invention. In the drawings, the same parts as those in FIGS. 1 to 8 are denoted by the same reference numerals, and description thereof is omitted. 41 is a revetment. (A) of each figure shows a cross-sectional view, and (B)
The figure shows a plan view. Here, a description will be given of a case where a road is provided along a seawall along a river or a seashore, and a wide passage is installed on the seawall. in this case,
If the revetment itself is strong and there is no problem with the strength of installing a passage on the revetment, it is sufficient to construct the passage directly on the revetment. However, if the revetment is aging and does not have sufficient strength, or if it is about to collapse due to inadequate construction, it will be necessary to start over from the revetment work and the construction of the passage will be very large Construction. That is, after the provisional seawall is set up, all the deteriorated seawalls are removed, and a seawall and a passageway having sufficient strength to set up the passageway again are constructed. According to the present invention, a wide passage can be installed without performing such a large-scale construction. Furthermore, the existing revetment can be reinforced or effectively function as a new revetment by the retaining wall provided at the time of setting the passage.

First, as shown in FIG. 9, on the side of the road 31 on the side where the passage is provided,
On the side, drill holes to provide foundation at predetermined intervals,
Then, concrete is cast and the foundation 21 is formed. In this case, there is a possibility that the ground has been modified when constructing the existing revetment 41, and it is preferable to dig a hole up to a stable ground to provide a foundation. Of course, the method of construction of the foundation is arbitrary. Here, an H-shaped steel or the like can be used as the column 22. At this time, the foundation 21 and the support 2
The predetermined interval at which 2 is provided can be, for example, about 2 to 3 m.

Next, the anchor weight 24 and the tie bar 25 are formed. This method is the same as the first example of the construction method described above, and will be described briefly here. But,
Various modifications similar to the first example described above are possible.

First, for example, as shown in FIG.
On the side (mountain side), an anchor receiving hole 32 for providing the anchor weight 24 on the stable ground is excavated, and a groove-shaped tie bar groove 33 is excavated between the anchor receiving hole 32 and the support column 22. For example, as shown in FIG. 6, the anchor weight 24 is formed in the excavated anchor receiving hole 32, and the tie bar 25 is provided in the tie bar groove 33. After the anchor weight 24 and the tie bar 25 are provided, the tie bar groove 33 is formed.
And the anchor receiving hole 32 is backfilled. The anchor weight 24 and the tie bar 25 are attached to each support 22.
, Or every one or several lines.

The anchor weight 24 and the tie bar 2
In the construction of No. 5, since the construction is performed in a direction crossing the existing road 31, traffic becomes an obstacle. However, as described above, short-distance and short-time traffic regulation is sufficient, so that the influence on traffic can be minimized.

Thereafter, as shown in FIG.
Is excavated in a groove shape, and the wall slab 23 is provided between the columns 22.
For example, when the wall plate 23 is formed of a PC plate, the PC plate may be excavated to a width in which the PC plate can be inserted, and the PC plate may be dropped according to the columns 22. In this case, since there is no need for an operator to enter the excavated trench, occupational accidents due to collapse of earth and sand can be prevented. Also, for example, the wall slab 23 can be made of reinforced concrete. In this case, a groove having a width capable of performing a certain amount of work is excavated, steel bars are assembled, a formwork is provided, concrete is poured, and the formwork is removed. Of course, other construction methods may be used.
After the wall slab 23 is provided, the wall slab 23 is backfilled at least on the road 31 side. Of course, it is preferable to back-fill on both sides of the wall slab 23.

Further, as shown in FIG. 11, a floor plate 26 is fitted and fixed on the wall slab 23 and the column 22, and a passage projecting toward the revetment 41 (valley side) is completed. At this time, if the existing revetment 41 has a certain level of strength, the floor plate 26 may be placed on the revetment 41 and the load applied to the floor plate 26 may be dispersed. Also, the newly provided retaining wall can function as a new revetment. For this reason, the floor board 26 may be attached so that a load is not applied to the revetment 41 so that the aged revetment 41 can be demolished at any time.

As in the first example, when the wall slab 23 and the floor plate 26 are integrally formed as shown in FIG. By just dropping it, the passage is completed. Also, for example, when constructing the wall slab 23 with reinforced concrete or the like,
The floor board 26 can be constructed integrally. In this case, the tie bar 25, the anchor weight 24, and the like can be integrally formed by connecting the reinforcing bars. In addition, various auxiliary facilities, such as a fence and a lighting device, can be installed in the completed passage. Also, the floor plate 26 can be variously deformed, such as further stacking plate materials. The road surface of the road 31 excavated in a groove shape is preferably paved again.

In this way, even if a revetment that does not have sufficient strength due to aging or poor construction has already been provided along a river or coast, a passage can be provided on the revetment side. At this time, the work can be performed in a short period of time by a relatively simple work without performing a large-scale work such as breaking down the existing revetment and constructing a new one as in the related art. Further, even when a passage is provided adjacent to a road as described above, the influence on traffic can be minimized. In addition, the newly provided retaining wall can reinforce the existing revetment or effectively function as a new revetment.

Further, the design of the anchor weights 24 and the tie bars 25 makes it possible for the passage portion to protrude farther away from the road than the wall slab 23, thereby securing a wide passage and extending from the existing road. The passage can be separated to ensure safety.

In the above-mentioned second example, the case where the revetment is provided mainly along the river or the coast has been described.
Of course, the present invention can be applied to a case where a retaining wall is already provided in a mountain area or the like. Further, in the above example, an example in which a passage is provided adjacent to a road is shown. However, the invention is not limited to this. For example, when constructing a farm road or a promenade in a mountainous area,
It can be applied to any passage.

[0043]

As is clear from the above description, according to the present invention, a passage that can be installed so as to protrude greatly toward the valley side is provided.
It can be easily and inexpensively constructed in a relatively short time. At this time, for example, even when the vehicle is installed on the side of an existing road, it is possible to construct the road according to the traffic situation without significantly hindering traffic on the road.

When an existing retaining wall is present, a passage can be provided by constructing the retaining wall on the mountain side of the retaining wall. As a result, there is an effect that the reconstruction of the retaining wall and the new construction of the passage can be performed in a short time and at low cost by a simple construction.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a first embodiment of a passage according to the present invention.

FIG. 2 is a plan view showing a first embodiment of a passage according to the present invention.

FIG. 3 is a sectional view showing a second embodiment of the passage of the present invention.

FIG. 4 is an explanatory view of a first example of a method for constructing a passage according to the present invention.

FIG. 5 is an explanatory view (continued) of a first example of a method for constructing a passage according to the present invention.

FIG. 6 is an explanatory view (continued) of a first example of a method for constructing a passage according to the present invention.

FIG. 7 is an explanatory view (continued) of the first example of the method of constructing a passage according to the present invention.

FIG. 8 is an explanatory view (continued) of the first example of the method of constructing a passage according to the present invention.

FIG. 9 is an explanatory view of a second example of the method for constructing a passage according to the present invention.

FIG. 10 is an explanatory view (continued) of a second example of the method for constructing a passage according to the present invention.

FIG. 11 is an explanatory view (continued) of a second example of the method of constructing a passage according to the present invention.

FIG. 12 is an explanatory view of an example of a conventional passage construction method.

FIG. 13 is a cross-sectional view of another example of the conventional retaining wall construction method.

FIG. 14 is a plan view of another example of the conventional retaining wall construction method.

[Explanation of symbols]

1 ... Bottom plate, 2 ... Vertical plate, 3 ... Backfill part, 4 ... Road, 5
... passage, 11 ... anchor bar receiver, 12 ... anchor bar, 13 ... retaining wall, 21 ... foundation, 22 ... support, 23 ... wall slab, 24 ... anchor weight, 25 ... tie bar, 26 ...
Floor board, 31 ... road, 32 ... anchor receiving hole, 33 ... tie bar groove, 41 ... seawall.

Claims (6)

[Claims] 1. A retaining wall portion, an anchor weight provided on a stable ground on a mountain side of the retaining wall portion, a tie bar provided between the anchor weight and the retaining wall portion, and a tie bar provided on the retaining wall portion. A passage, wherein at least a part of the passage has a floor plate portion projecting toward a valley side from the retaining wall portion. 2. The passage according to claim 1, wherein the floor panel is formed separately from the retaining wall, and is fixed to the retaining wall. 3. The passage according to claim 1, wherein the retaining wall portion and the floor plate portion are integrally formed. 4. The passage according to claim 1, wherein the retaining wall portion is provided on a mountain side with respect to an existing retaining wall. 5. A retaining wall portion is formed, a groove extending from the retaining wall portion to the mountain side is excavated, an anchor weight is provided at a mountain side end of the groove, and the anchor weight and the anchor weight are provided in the groove. A method of constructing a passage, comprising connecting a back wall portion with a tie bar and backfilling, and forming a floor plate portion at least partially protruding toward the valley side from the holding wall portion above the retaining wall portion. 6. A method for constructing a passage, wherein the retaining wall portion and the floor plate portion are integrally formed.