JP6489741B2 - Wall structure - Google Patents

Description

  The present invention relates to a wall structure applied to a steel retaining wall, a water-impervious wall, a seawall, a quay wall, etc., which have a relatively severe corrosive environment such as a harbor and require anticorrosion measures.

Conventionally, a steel pipe sheet pile having an anticorrosion layer has been used as a steel retaining wall or the like that has a relatively severe corrosive environment such as a harbor and requires anticorrosion measures. The anticorrosion layer is applied to a particularly severe part of the corrosive environment such as a splash zone or a tidal zone. For example, when an anticorrosion layer is applied to the splash band, a steel sheet pile, a steel pipe sheet pile, etc. have a non-corrosion prevention layer in part. If the steel material has an anticorrosion portion or a flaw, rust is generated in the steel material at that portion, and there is a risk that the rust may invade the end face of the covering portion. Since rust has a larger volume than the lost iron, the end of the coating layer is lifted by the occurrence of rust, and peeling is likely to occur. For this reason, the corrosion of the steel material progresses, and there is a concern that the cross-sectional performance may be deteriorated due to the peeling of the anticorrosion layer or the thickness of the steel material. Easy to peel off.
Moreover, although a steel sheet pile and a steel pipe sheet pile connect a joint and construct | assemble a wall body structure, the steel materials adjacent at the time of construction contact in a joint part, and there exists a possibility that a corrosion protection layer may be damaged by the contact. If the anticorrosion layer is damaged, the portion becomes an end face, and peeling may proceed from there. Furthermore, there is a concern about the effect of frictional heat on the anticorrosion layer due to the contact between the steel materials in the joint.

Patent Document 1 discloses a method in which a heavy anticorrosion coating is applied to each of a steel pipe pile and a joint member and then joined with a bolt to form a heavy anticorrosion steel pipe sheet pile. This method includes a step of machining bolt holes at a predetermined interval in the longitudinal direction of a steel pipe pile, a step of manufacturing a heavy anti-corrosion steel pipe pile by coating a surface of the steel pipe pile with an anti-corrosion coating material, and the heavy anti-corrosion steel pipe. A step of drilling the anticorrosion coating layer of the pile and penetrating the bolt hole; the bolt hole of the joint member having bolt holes previously drilled at the same interval as the bolt hole of the steel pipe pile; and the bolt of the heavy anticorrosive steel pipe pile And a step of joining the holes with bolts.
Further, Patent Document 2 discloses a cover of a connecting portion that is attached to a connecting portion of a heavy-duty corrosion-resistant steel pipe sheet pile. This connection part cover is a long plate-like body that is attached to the connection part of the heavy corrosion-resistant coated steel sheet pile or steel pipe sheet pile that has been connected, and its both side edges suppress the heavy anti-corrosion coating part, from the connection side edge This prevents the progress of peeling of the heavy anticorrosion coating. A water-stopping material injection hole is provided in the upper part of the connecting portion cover, and the water-stopping material is injected from the injection hole after the connecting portion cover is mounted.

JP-A-3-33311 JP 11-280058 A

However, in the technique described in Patent Document 1, it is necessary to separately coat the steel pipe pile and the joint member, and since the bolt portion becomes a protrusion inside the joint, the resistance is reduced when fitting the adjacent steel pipe sheet piles. There is a problem that it takes a lot of work to construct. In addition, there is a problem that an end face is formed on the steel pipe pile portion by the bolt hole provided in the steel pipe, and the peeling easily proceeds from this end face.
Moreover, in the technique of the said patent document 2, it is necessary to construct the cover of a connection part on-site after driving a steel pipe sheet pile, and there exists a problem that an installation effort increases.
Furthermore, even if it is a steel pipe sheet pile having an anticorrosion layer, as described above, the peeling caused by the presence of the anticorrosion layer in part, and the corrosion of the steel part caused by the progress of the corrosion due to peeling There are concerns about the deterioration of the cross-sectional performance due to the thickness reduction, the peeling due to the flaws caused by the contact between adjacent steel materials in the joint, and the influence of frictional heat on the anticorrosion layer due to the contact between the steel materials of the joint.

  The present invention has been made in view of the above circumstances, and the corrosion resistance layer peeling, the degradation of the cross-sectional performance due to the reduction in the thickness of the steel material due to the progress of corrosion due to peeling, the frictional heat due to the contact between the steel materials The object is to provide a wall structure that can prevent the influence on the anticorrosion layer and is easy to construct.

In order to achieve the above object, the wall structure of the present invention includes a plurality of steel pipes arranged in a columnar shape without contacting each other, and a soil retaining member for sealing a gap between the adjacent steel pipes. Wall structure,
The steel pipe is provided with an anticorrosion layer extending in the circumferential direction of the steel pipe in at least a part of the longitudinal direction of the steel pipe.

  Here, the anticorrosion layer may be provided by coating the outer peripheral surface of the steel pipe with a resin such as polyethylene or polyurethane in advance (a heavy anticorrosion coating) at a factory or the like, or on the outer peripheral surface of the steel pipe at the site. You may provide by winding the metal cover which is harder to rust, or the cover made from FRP.

In the present invention, a plurality of steel pipes arranged in a columnar shape without contacting each other are provided with corrosion prevention layers extending in the circumferential direction on at least a part of the longitudinal direction of the steel pipes, so-called painted end faces are provided. I can lose it. Therefore, peeling of the anticorrosion layer from the paint end face, peeling of the anticorrosion layer due to collision of drifting objects or corrosion of the non-corrosion-proof portion can be prevented, and deterioration of the cross-sectional performance due to thickness reduction of the steel material can be avoided.
In addition, since the steel pipes do not have a joint structure and are arranged without contacting each other, the possibility of damage to the anticorrosion layer due to contact between the steel materials during construction can be reduced, and the contact between the steel materials in the joint portion can be reduced. The frictional heat due to the corrosion does not affect the anticorrosion layer.
Moreover, although the steel pipe does not have a joint structure, since the gap between adjacent steel pipes is sealed by the earth retaining member, the suction of earth and sand from the gap can be prevented.
Furthermore, since it does not have a joint structure unlike the prior art, an anticorrosion layer on the joint structure is not required, and a connecting portion cover as in the prior art is not required, so that the construction is easier than before.

  The said structure of this invention WHEREIN: The continuous wall made from steel or the continuous wall made from concrete may be sufficient as the said member for earth retaining in the arrangement | positioning direction of the said steel pipe. In this case, these continuous walls may be disposed so as to be in contact with the steel pipe, or may be disposed at a predetermined interval from the steel pipe.

According to such a configuration, the back side of the continuous wall (the side opposite to the side with the steel pipe) can be securely earthed by the continuous wall made of steel or the continuous wall made of concrete, and from the gap between the steel pipes Can surely prevent the earth and sand from being sucked out.
In addition, since the earth pressure acting on the steel continuous wall or the concrete continuous wall can be received by the steel pipe placed on the ground, the steel continuous wall or the concrete continuous wall may fall down or deform due to the earth pressure. Can be prevented.

  Moreover, the said structure of this invention WHEREIN: The anti-corrosion layer may be provided in the said steel continuous wall.

  According to such a configuration, since the corrosion prevention layer is provided on the steel continuous wall, it is possible to avoid the deterioration of the cross-sectional performance due to the reduction in the thickness of the steel material, and the structural performance of the steel continuous wall as a retaining member is expected. can do.

  Moreover, the said structure of this invention WHEREIN: The planar suction | inhalation prevention member which follows the arrangement | positioning direction of the said steel pipe may be sufficient as the said earth retaining member.

  As the sheet-like sucking prevention member, for example, a sucking prevention sheet or a wire mesh can be used. In this case, since the suction preventing member has a planar shape and is flexible, it is preferably disposed so as to be in contact with the steel pipe and a predetermined portion of the planar suction preventing member is fixed to the steel pipe. In addition, as for the sheet for preventing suction, use a water-permeable sheet when water-stopping is required, such as a waste disposal site, and use a water-permeable sheet when water flow must not be stopped. .

  According to such a configuration, since the earth retaining member is a planar suction preventing member, the construction is easier and the cost can be reduced as compared with a continuous wall made of steel or a continuous wall made of concrete.

Moreover, the said structure of this invention WHEREIN: The single member provided between the adjacent steel pipes may be sufficient as the said member for earth retaining.
In this case, the single member is preferably a long member along the longitudinal direction of the steel pipe, and is preferably in contact with adjacent steel pipes or arranged with a slight gap.

  According to such a configuration, since the earth retaining member is a single member provided between adjacent steel pipes, it is easier to construct and costs than a continuous wall made of steel or a continuous wall made of concrete. Can be reduced.

Moreover, the said structure of this invention WHEREIN: Steel or the product made from concrete may be sufficient as the single member as a member for earth retaining.
As the single member made of steel, for example, a shape steel such as an L-shaped steel or an H-shaped steel can be used. Moreover, as a concrete single member, a concrete pile can be used, for example.

  According to such a configuration, since the single member as the earth retaining member is made of steel or concrete, the single member can prevent the suction of earth and sand from the gap between adjacent steel pipes, and can also prevent earth pressure. It will be able to withstand enough.

  Moreover, the said structure of this invention WHEREIN: The anti-corrosion layer may be provided in the steel single member as the said earth retaining member.

  According to such a configuration, since the anticorrosion layer is provided on the single member made of steel, it is possible to avoid the deterioration of the cross-sectional performance due to the thickness reduction of the steel material, and expect the structural performance of the single member as the retaining member. be able to.

  According to the present invention, it is possible to prevent the corrosion-resistant layer from being deteriorated by reducing the cross-sectional performance due to the reduction in the thickness of the steel material due to the corrosion of the corrosion-resistant layer being peeled off and peeling, and the contact between the steel materials being affected by the frictional heat. At the same time, construction becomes easy. Therefore, it is effective in reducing the maintenance cost during the service period and extending the life of the structure.

1 is a plan sectional view of a wall structure according to a first embodiment of the wall structure according to the present invention. It is a side sectional view of a wall body concept same as the above. It is a sectional side view of another wall body structure. It is a plane sectional view showing a 2nd embodiment of a wall structure concerning the present invention. It is a plane sectional view showing a 3rd embodiment of a wall structure concerning the present invention. It is a plane sectional view showing a 4th embodiment of a wall structure concerning the present invention. It is a plane sectional view showing a 5th embodiment of a wall structure concerning the present invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 and FIG. 2 are views showing a first embodiment of the present invention. FIG. 1 is a plan sectional view of a wall body structure, and FIG. 2 is a side sectional view of the wall body structure.

In FIG. 1, the code | symbol 1 shows a steel pipe and the code | symbol 2 shows the member for earth retaining. The wall structure of the present embodiment includes a plurality of steel pipes 1 arranged in a columnar array at predetermined intervals without being in contact with each other, and an earth retaining member 2 for sealing a gap between adjacent steel pipes 1 and 1 It has.
The steel pipe 1 is a cylindrical steel pipe pile. As shown in FIG. 2, the steel pipe 1 has an anticorrosion layer 3 extending in the circumferential direction of a part of the steel pipe 1 in the longitudinal direction, that is, the upper end of the steel pipe 1. Is provided.
Here, in the present embodiment, the steel pipe 1 is placed almost vertically in a place where a corrosive environment such as a harbor is relatively severe. Such marine environments, such as harbors, are classified into six types, namely, the marine atmosphere, splash zone, tidal zone, seawater, submarine soil, and back soil. And the corrosion rate of steel materials is the largest in the splash zone, followed by the tidal zone, the middle seawater, and the middle seabed soil.

  For this reason, in this Embodiment, the corrosion prevention layer 3 is provided in the site | part corresponding to the splash zone part and tidal zone part with a quick corrosion rate, ie, the upper end part of the steel pipe 1. FIG. Thus, in this Embodiment, although the anticorrosion layer 3 was provided only in the upper end part of the steel pipe 1, you may provide the anticorrosion layer 3 also in the site | part corresponding to seawater middle part and seabed soil middle part. That is, the anticorrosion layer 3 may be provided over the entire length of the steel pipe 1.

  As the method of providing the anticorrosion layer 3 on the outer peripheral surface of the steel pipe 2, there are roughly two methods, a method of covering the anticorrosion layer 3 in advance at a factory or the like and a method of covering the anticorrosion layer 3 on site. These two methods are shown in Table 1.

In Table 1, (1) painting is a coating of various paints on the outer circumference of steel pipes by factory equipment, (2) polyethylene coating is a coating of polyethylene resin on the outer circumference of steel pipes by factory equipment, (3) urethane Elastomer coating is made by coating urethane elastomer (polyurethane resin) on the outer surface of steel pipes with factory equipment. (4) Ultra-thick film epoxy resin coating is made of two-component mixed curing type epoxy resin coating material by factory equipment. The outer peripheral surface of the steel pipe is coated to a film thickness of about 1 to 3 mm.
In addition, (5) Petrolatum coating and (6) Mortar coating are structures in which Petrolatum or mortar is locally coated with a metal cover or FRP cover. In other words, before placing the steel pipe, it is provided so that petrolatum or mortar is wound around the outer peripheral surface of the steel pipe, and the petrolatum or mortar is covered so as to be wrapped with a metal cover or FRP cover with a flange at both ends. The anticorrosion layer can be provided on the steel pipe in advance by joining both ends of the cover with studs or bolts. Even after the steel pipe is placed, if the steel pipe is self-supporting in the sea before being buried and is discretely arranged, a cover can be provided on the outer peripheral surface of the steel pipe without attaching studs to the steel pipe. It becomes possible.

Thus, the steel pipe 1 provided with the anticorrosion layer 3 at the upper end portion is arranged in a columnar shape without being in contact with each other, and the earth retaining member 2 is provided on the back side (land side) of these steel pipes 1. It has been.
This earth retaining member 2 is a continuous steel wall 2 that is continuous in the arrangement direction of the steel pipe 1 (left and right direction in FIG. 1). The steel continuous wall 2 is configured by connecting a plurality of hat-shaped steel sheet piles 4. The steel sheet pile 4 has a pair of webs 4a, a pair of flanges 4b extending diagonally so as to spread from both side edges of the webs 4a, and a pair of left and right flanges 4b extending left and right in parallel to the webs 4a. An arm 4c and a joint 4d provided at the tip of the arm 4c are provided.
The plurality of steel sheet piles 4 are connected to the joints 4d and arranged in a line, and are placed in a substantially vertical position on the ground, whereby the steel continuous wall 2 is constructed.

  In the present embodiment, as shown in FIG. 2, the upper and lower lengths of the steel continuous wall 2 are shorter than the length of the steel pipe 1. That is, since the steel pipe 1 is a structural member, the steel continuous wall 2 that is the earth retaining member 2 prevents the leakage of earth and sand from the wall surface, prevents the suction of earth and sand from the bottom surface, and stabilizes the bottom surface (boiling, heaving, etc.) In consideration of the necessary penetration depth, etc., the minimum penetration depth (depth) is set and is located above the lower end of the steel pipe 1. Further, the steel continuous wall 2 may be simply settled on the sea bottom without being embedded.

In addition, when the water flow must not be stopped due to an ecological environment such as a living organism, the vertical length of the steel continuous wall 2 as the earth retaining member 2 is shortened from the lower end of the steel continuous wall 2. The flow of water is secured from the lower part.
In addition, the upper end of the steel pipe 1 and the upper end of the steel continuous wall 2 are connected by coping concrete 5.

In the present embodiment, as shown in FIG. 3, the upper and lower lengths of the steel continuous wall 2 may be longer than the length of the steel pipe 1. That is, for example, when it is necessary to incorporate the steel continuous wall 2 up to the water shielding layer for water stop, it is not necessary to lengthen both the steel pipe 1 and the steel continuous wall 2, and for soil retaining. What is necessary is just to lengthen only the steel continuous wall 2 as the member 2, and to infiltrate a water-impervious layer.
In this way, even if it is not necessary to have the steel continuous wall 2 in the structure, the earth retaining member can be used in cases where water-stopping is required at a waste disposal site, or when the bottom surface is stable (boiling, heaving, etc.). The upper and lower lengths of the steel continuous wall 2 as 2 are lengthened, and the lower ends thereof are projected downward from the lower ends of the steel pipe 1. In this case, the lower end portion of the continuous steel wall 2 protruding from the lower end of the steel pipe 1 is a range necessary for water stoppage.

According to the present embodiment, a plurality of steel pipes 1 arranged in a columnar shape without being in contact with each other, the anticorrosion layer 3 extending in the circumferential direction has an upper end part of the steel pipe 1, that is, a splash zone part having a high corrosion rate, and Since it is provided in the site | part corresponding to a tidal zone part, what is called a coating end surface can be eliminated in this site | part. Therefore, peeling of the anticorrosion layer 3 from the coating end face, peeling of the anticorrosion layer 3 due to collision of drifting objects or corrosion of the non-corrosion-proof portion can be prevented, and deterioration in cross-sectional performance due to reduction in the thickness of the steel material can be avoided.
Moreover, since the steel pipe 1 does not have a joint structure and is disposed without being in contact with each other, it is possible to reduce the possibility that the anticorrosion layer 3 is damaged due to the contact between the steel materials during construction, and the steel materials of the joint portions are connected to each other. The frictional heat due to the contact with the anticorrosive layer 3 is not affected.
Moreover, although the steel pipe 1 does not have a joint structure, since the gap between the adjacent steel pipes 1 and 1 is sealed by the steel continuous wall 2 that is the earth retaining member 2, the suction of earth and sand from the gap can be prevented. .
Moreover, since the earth pressure which acts on the steel continuous wall 2 can be received by the steel pipe 1 cast in the ground, the steel continuous wall 1 can be prevented from falling or deforming due to the earth pressure.
Furthermore, since it does not have a joint structure unlike the prior art, an anticorrosion layer on the joint structure is not required, and a connecting portion cover as in the prior art is not required, so that the construction is easier than before.

In addition, in this Embodiment, although the anticorrosion layer 3 was provided only in the steel pipe 1, you may provide an anticorrosion layer in the steel continuous wall 2 in addition to this. In this case, since the anti-corrosion layer is provided on the steel continuous wall 3, the thickness of the steel material can be avoided, and the possibility of failing to perform the earth retaining function such as a hole in the member due to corrosion can be reduced. It becomes possible to increase the service life of the member.
The anticorrosion layer is provided on the surface of the steel continuous wall 2 facing the steel pipe 1 side, that is, on the surface on the sea side.
Moreover, in this Embodiment, although the earth retaining member 2 was the steel continuous wall 2, it may replace with this and may be a concrete continuous wall. If it is a continuous wall made of concrete, it is not necessary to provide an anticorrosion layer on the surface.

(Second Embodiment)
FIG. 4 is a plan sectional view showing a second embodiment of the present invention. The difference between the present embodiment and the first embodiment is that the earth retaining member is the steel continuous wall 2 in the first embodiment, whereas the earth retaining member is different from the first embodiment. It is a point which is the planar suction prevention member 12.
Since other configurations are the same as those of the first embodiment, common portions are denoted by the same reference numerals, and description thereof is omitted or simplified.

As shown in FIG. 4, in the present embodiment, the earth retaining member is a sheet-like suction preventing member 12 that is continuous in the arrangement direction of the steel pipe 1 (the left-right direction in FIG. 4).
As the sheet-like sucking prevention member 12, for example, a sucking prevention sheet, a wire net, and a water shielding sheet can be used.
As the sheet for preventing suction, for example, a short fiber nonwoven fabric for civil engineering in which polyester fibers are needle-punched and binder-processed can be used. This sheet is suitable as a material for preventing sucking / scouring.

Since the suction preventing member 12 is planar and flexible, it is disposed so as to contact the steel pipe 1, and a predetermined portion of the planar suction preventing member 12 is fixed to the steel pipe 1. ing.
When the suction prevention member 12 is fixed to the steel pipe 1, the suction prevention member 12 may be fixed to the steel pipe 1 using an appropriate fixing means at the portion where the suction prevention member 12 contacts the steel pipe 1, but not fixed to all the steel pipes 1. Alternatively, it may be fixed only to a predetermined steel pipe 1.

  According to the second embodiment, the same effects as those of the first embodiment can be obtained, and the earth retaining member is the planar suction preventing member 12, so that the steel continuous wall 2 and the concrete are made. Compared to a continuous wall made of metal, there are advantages that construction is easy and costs can be reduced.

(Third embodiment)
FIG. 5 is a plan sectional view showing a third embodiment of the present invention. The difference between the present embodiment and the first embodiment is that the earth retaining member is the steel continuous wall 2 in the first embodiment, whereas the earth retaining member is different from the first embodiment. It is a point that is a single member 15 made of steel provided between adjacent steel pipes 1 and 1.
Since other configurations are the same as those of the first embodiment, common portions are denoted by the same reference numerals, and description thereof is omitted or simplified.

As shown in FIG. 5, the single member 15 is made of L-shaped steel, and the single member 15 is disposed between the adjacent steel pipes 1 and 1. Moreover, the single member 15 is arrange | positioned substantially parallel to the steel pipe 1, and is laid on the ground substantially perpendicularly. One piece of the L-shaped single member 15 is in contact with one steel pipe 1, and the other piece is in contact with the other steel pipe 1. The single member 15 may be disposed between the adjacent steel pipes 1 and 1 with a slight gap.
Moreover, the upper and lower lengths of the single member 15 may be shorter than the length of the steel pipe 1, similarly to the steel continuous wall 2 of the first embodiment.

According to the third embodiment, the same effect as that of the first embodiment can be obtained, and the earth retaining member is an L-shaped single member 15 provided between the adjacent steel pipes 1 and 1. Therefore, compared with the steel continuous wall 2 and the continuous wall made from concrete, construction is easy and cost can be reduced.
Moreover, since the single member 15 is made of steel, the single member 15 can prevent the suction of earth and sand from the gap between the adjacent steel pipes 1 and 1 and can sufficiently withstand the earth pressure.

(Fourth embodiment)
6 (a) and 6 (b) are plan sectional views showing a fourth embodiment of the present invention. This embodiment is different from the third embodiment in that the single member 15 as a retaining member is made of L-shaped steel in the third embodiment, whereas in the present embodiment, It is the point comprised with H-section steel.
Since other configurations are the same as those of the third embodiment, common portions are denoted by the same reference numerals, and description thereof is omitted or simplified.

As shown in FIGS. 6 (a) and 6 (b), the single member 15 is made of L-shaped steel, and this single member 15 is disposed between the adjacent steel pipes 1 and 1. Moreover, the single member 15 is arrange | positioned substantially parallel to the steel pipe 1, and is laid on the ground substantially perpendicularly. The H-shaped single member 15 includes a web 15a and flanges 15b and 15b provided at both ends of the web 15a.
As shown in FIG. 6A, the single member 15 has one end of one flange 15b in contact with one steel pipe 1, and the other end in contact with the other steel pipe 1. As shown in FIG. 6 (b), one end of one flange 15b is in contact with one steel pipe 1, and one end of the other flange 15b is in contact with the other steel pipe 1. There is a case.
The single member 15 may be disposed between the adjacent steel pipes 1 and 1 with a slight gap.
Moreover, the upper and lower lengths of the single member 15 may be shorter than the length of the steel pipe 1, similarly to the steel continuous wall 2 of the first embodiment.

According to the fourth embodiment, the same effect as that of the first embodiment can be obtained, and the earth retaining member is an H-shaped single member 15 provided between the adjacent steel pipes 1 and 1. Therefore, compared with the steel continuous wall 2 and the continuous wall made from concrete, construction is easy and cost can be reduced.
Moreover, since the single member 15 is made of steel, the single member 15 can prevent the suction of earth and sand from the gap between the adjacent steel pipes 1 and 1 and can sufficiently withstand the earth pressure.

  In the third and fourth embodiments, the anticorrosion layer 3 is provided only on the steel pipe 1, but in addition to this, an anticorrosion layer is provided on the single member 15 made of L-shaped steel or H-shaped steel. Also good. In this case, since the anticorrosion layer is provided on the single member 15, it is possible to avoid the deterioration of the cross-sectional performance due to the reduction in the thickness of the steel material, and to reduce the possibility of failing to perform the earth retaining function such as a hole in the member due to corrosion. It becomes possible to increase the service life of the single member 15 as the earth retaining member.

(Fifth embodiment)
FIG. 7 is a cross-sectional plan view showing a fifth embodiment of the present invention. This embodiment differs from the third and fourth embodiments in that the single member 15 as the earth retaining member is made of L-shaped steel in the third embodiment, and in the fourth embodiment, Whereas the single member 16 as the earth retaining member is composed of a concrete pile, it is composed of an H-shaped steel.
Since other configurations are the same as those of the third and fourth embodiments, common portions are denoted by the same reference numerals, and description thereof is omitted or simplified.

As shown in FIG. 7, the single member 16 is constituted by a cylindrical concrete pile, and the single member 16 is disposed between the adjacent steel pipes 1 and 1. Moreover, the single member 16 is arrange | positioned substantially in parallel with the steel pipe 1, and is driven in the ground substantially perpendicularly. The outer peripheral surface of the cylindrical single member 16 is in contact with the adjacent steel pipes 1 and 1, respectively. The single member 16 may be disposed between the adjacent steel pipes 1 and 1 with a slight gap.
Further, the upper and lower lengths of the single member 16 may be shorter than the length of the steel pipe 1, similarly to the steel continuous wall 2 of the first embodiment.

According to the fifth embodiment, the same effect as in the first embodiment can be obtained, and the earth retaining member is a single member 16 made of concrete provided between the adjacent steel pipes 1 and 1. Therefore, compared with the steel continuous wall 2 and the continuous wall made from concrete, construction is easy and cost can be reduced.
Further, the single member 16 can prevent the earth and sand from being sucked out from the gap between the adjacent steel pipes 1 and 1, and can sufficiently withstand the earth pressure.
In addition, since the single member 16 is a concrete pile, unlike the case where the single member 15 is steel, it is not necessary to provide an anticorrosion layer in the single member 16.

  In the third to fifth embodiments, the steel single member 15 or the concrete single member 16 is used as the earth retaining member between the steel pipes 1 and 1, but the revetment is constructed with buried soil. For example, in order to prevent earth and sand from leaking out from the gap between the steel pipes 1 and 1, instead of the single members 15 and 16 as the earth retaining members, the gap may be filled with crushed stones or other appropriate padding.

1 Steel pipe 2 Earth retaining member (Steel continuous wall)
3 Anticorrosion layer 4 Steel sheet pile 12 Suction prevention member 15 Steel single member 16 Concrete single member

Claims (1)

A wall structure including a plurality of steel pipes arranged in a columnar form without contacting each other and placed on the ground of the water bottom, and a retaining member for sealing a gap between the adjacent steel pipes,
In the steel pipe, an anticorrosion layer covering the outer peripheral surface of the steel pipe over the entire circumference is provided on at least a part of the longitudinal direction of the steel pipe,
The earth retaining member is a suction-preventing member having flexibility in a planar shape that is continuous in the arrangement direction of the steel pipe,
A wall structure characterized in that the suction preventing member is fixed to at least the predetermined steel pipe among the plurality of the steel pipes.

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