JP7416646B2 - Steel sheet pile connection structure and steel sheet pile connection method - Google Patents

Description

The present invention relates to a steel sheet pile connection structure and a steel sheet pile connection method.

Steel sheet piles are generally connected by fitting joints formed on both sides in the width direction to form a steel sheet pile wall. As a technique related to such a connection of steel sheet piles, for example, Patent Document 1 describes that even when a trailing steel sheet pile is driven after being left for a long time after driving a preceding steel sheet pile, the joint portion of the steel sheet piles is describes a technique for developing good water-stopping properties. Specifically, a water-absorbing and swelling water-stopping material is applied to the inside of the joint of the steel sheet pile that is to be cast in advance, and an impermeable material is applied or pasted to cover the water-absorbing and swelling water-stopping material. Technology for removing impermeable material at the joint of the trailing steel sheet pile that is fitted into the joint of the preceding steel sheet pile when driving the trailing steel sheet pile adjacent to the preceding steel sheet pile that has already been placed. is listed.

Japanese Patent Application Publication No. 2002-363974

For example, if a long period of time has passed after the preceding steel sheet pile was placed, in addition to the problem that the water-absorbing and swelling waterproof material expands as described in Patent Document 1, Another problem is that the steel sheet piles that have been installed are deformed by earth pressure, making it difficult to connect the steel sheet piles that will be installed later. In such a case, it is desirable to use a connection structure that does not directly connect the steel sheet piles to each other by fitting joints, and has the same cross-sectional performance as connection by joints. For example, when connecting steel sheet piles made of ordinary steel and steel sheet piles made of stainless steel, the steel sheet piles should be connected to each other in order to prevent corrosion caused by contact between dissimilar metals and the formation of batteries. It is preferable to use a connection structure that is not directly connected.

Therefore, the present invention aims to provide a steel sheet pile connection structure and a steel sheet pile connection method that do not directly connect steel sheet piles to each other by fitting joints, and have the same cross-sectional performance as connection by joints. purpose.

[1] A first steel sheet pile driven into the ground, a reinforcing member driven into the ground adjacent to the first steel sheet pile, and a reinforcing member driven into the ground adjacent to the reinforcing member. A filler structure constructed on both sides of the second steel sheet pile and the reinforcing member, to which the first portion of the first steel sheet pile, the second portion of the second steel sheet pile, and at least a portion of the reinforcing member are anchored. A connected structure of steel sheet piles comprising a body and a steel sheet pile.
[2] The connection of steel sheet piles according to [1], wherein the filler structure is electrically insulating, and either or both of the first steel sheet pile and the second steel sheet pile do not contact the reinforcing member. structure.
[3] The steel sheet pile connection structure according to [2], wherein the first steel sheet pile and the second steel sheet pile are formed of mutually different types of steel materials.
[4] The steel sheet pile connection structure according to [3], wherein the first steel sheet pile is made of ordinary steel, and the second steel sheet pile is made of stainless steel.
[5] The method according to [2] to [4], further comprising a pair of lid members, at least one of which is electrically insulating, and which is arranged between the reinforcing member and each of the first steel sheet pile and the second steel sheet pile. The connection structure of steel sheet piles according to any one of the items.
[6] In contact with the first steel sheet pile, or another steel sheet pile connected to the first steel sheet pile, and the second steel sheet pile, or another steel sheet pile connected to the second steel sheet pile, respectively. , the filler structure further includes a form member that does not contact the reinforcing member and is electrically insulated between at least the first steel sheet pile side and the second steel sheet pile side, and the filler structure The steel sheet pile connection structure according to [5], which is constructed in a space surrounded by the second steel sheet pile, the reinforcing member, a pair of lid members, and the formwork member.
[7] The reinforcing member is an H-shaped steel, the first portion and the second portion are located in an area surrounded by the web and flange of the H-shaped steel, and the pair of lid members are connected to the formwork member. are arranged between both ends of the flange of the H-shaped steel on the opposite side and each of the first steel sheet pile and the second steel sheet pile, and the filler structure is arranged between the first steel sheet pile and the second steel sheet pile. The steel sheet pile connection structure according to [6], which is constructed in a space surrounded by the sheet pile, a flange on the opposite side of the H-shaped steel formwork member, a pair of lid members, and the formwork member.
[8] An additional pair of lid members arranged between the reinforcing member and each of the first steel sheet pile and the second steel sheet pile on the opposite side to the pair of lid members, at least one of which is electrically insulating. The steel sheet pile connection structure according to [5], further comprising: the filler structure is constructed in a space surrounded by a reinforcing member, a pair of lid members, and an additional pair of lid members.
[9] A step of driving a reinforcing member into the ground adjacent to the first steel sheet pile driven into the ground, and a step of driving a second steel sheet pile into the ground adjacent to the reinforcing member. and a step of excavating the ground in an area including the first part of the first steel sheet pile and the second part of the second steel sheet pile on both sides of the reinforcing member, and applying filler to the area where the ground has been excavated. filling to construct a filler structure in which the first portion, the second portion, and at least a portion of the reinforcing member are anchored.
[10] The filler structure is electrically insulating, and in the process of driving the reinforcing member into the ground, the reinforcing member is cast so as not to come into contact with the first steel sheet pile, or the reinforcing member is cast into the second steel sheet pile. The method for connecting steel sheet piles according to [9], wherein the second steel sheet pile is driven so as not to contact the reinforcing member in the driving process.
[11] A pair of lid members, at least one of which is electrically insulating, surrounding the area where the ground has been excavated, and arranged between the reinforcing member and each of the first steel sheet pile and the second steel sheet pile; the first steel sheet pile, or another steel sheet pile connected to the first steel sheet pile, and the second steel sheet pile, or another steel sheet pile connected to the second steel sheet pile, respectively; The step of constructing the filler structure further includes the step of arranging an electrically insulated formwork member between the first steel sheet pile side and the second steel sheet pile side, and the step of constructing the filler structure includes a pair of lid members and a second steel sheet pile side. The method for connecting steel sheet piles according to [10], wherein the inside of the formwork member is filled with a filler.

According to the above configuration, the first steel sheet pile and the second steel sheet pile can be indirectly connected using the filler structure. By fixing the reinforcing member to the filler structure in addition to a portion of each steel sheet pile, it is possible to maintain the same cross-sectional performance as a connection using a joint. Thereby, for example, even if it is difficult to connect the steel sheet piles by fitting the joints with the steel sheet piles to be driven later due to deformation of the previously driven steel sheet piles, the steel sheet piles can be connected. Further, for example, when a steel sheet pile made of ordinary steel and a steel sheet pile made of stainless steel are connected, corrosion due to contact between different metals can be prevented.

It is a top view of the connection structure of the steel sheet pile concerning the 1st embodiment of the present invention. 2 is a sectional view taken along line II-II of the connection structure shown in FIG. 1. FIG. It is a top view of the connection structure of the steel sheet pile concerning the 2nd embodiment of the present invention. It is a top view of the connection structure of the steel sheet pile concerning the 3rd embodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Note that, in this specification and the drawings, components having substantially the same functional configurations are designated by the same reference numerals and redundant explanation will be omitted.

FIG. 1 is a plan view of a steel sheet pile connection structure according to a first embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II of the connection structure shown in FIG. In the illustrated example, a steel sheet pile wall is constructed by driving ordinary steel sheet piles 1A, 1B, and 1C into the ground and connecting them with joints 11 formed on both sides in the width direction, and a stainless steel sheet pile wall The steel sheet pile walls are connected by driving steel sheet piles 2A, 2B, and 2C into the ground and connecting them to each other with joints 21 formed on both sides in the width direction. Although the steel sheet pile 1A and the steel sheet pile 2A are located adjacent to each other in a series of steel sheet pile walls, the joints 11 and 21 do not fit into each other. Between the steel sheet pile 1A and the steel sheet pile 2A, an H-shaped steel 3 is driven into the ground as a reinforcing member adjacent to each steel sheet pile. The H-section steel 3 is arranged so that the flange 31 faces the extension direction of the steel sheet pile wall, and includes a part of the steel sheet pile 1A (first part 12A) and a part of the steel sheet pile 2A (second part 22A). are located in the area surrounded by the web 32 and flange 31 of the H-section steel 3, respectively. Concrete structures 4 are constructed as filler structures on both sides of the H-beam 3. A first portion 12A of the steel sheet pile 1A, a second portion 22A of the steel sheet pile 1B, and a portion of the H-section steel 3 except for one side of one flange 31 are fixed to the concrete structure 4.

According to the above configuration, the first portion 12A of the steel sheet pile 1A and the second portion 22A of the steel sheet pile 2A are fixed to the common concrete structure 4, and the concrete structure 4 is connected to the H-shaped steel 3. Since the joints 11 and 21 are reinforced, even if the joints 11 and 21 do not fit into each other in a joint structure, it is possible to maintain the same cross-sectional performance as a joint-based joint. The reinforcing member fixed to the concrete structure 4 is not limited to the H-shaped steel 3, but may be any type of shaped steel, such as a steel pipe with a circular or rectangular cross section, an angle steel, a channel steel, or a T-shaped steel. good. Furthermore, the concrete structure 4 may be made of reinforced concrete by arranging reinforcing bars as reinforcing members.

Here, as shown in the cross-sectional view of FIG. 2, the concrete structure 4 does not have to be constructed over the entire length of the steel sheet piles 1A and 2A, that is, the entire height of the steel sheet pile wall. The ground may be excavated on one side and the construction may be limited to the portion where the steel sheet piles 1A and 2A are exposed. The H-section steel 3 may be driven deeper than the concrete structure 4, for example, to the same depth as the steel sheet piles 1A and 2A. If the ground is not excavated on both sides of the steel sheet pile wall and the steel sheet piles 1A, 2A and H-beam 3 are buried underground, the ground will act in the same way as the concrete structure 4. The same cross-sectional performance as the part where the concrete structure 4 is constructed is maintained.

Further, according to the above configuration, since the concrete structure 4 is electrically insulating, at least the steel sheet pile 2A made of stainless steel is arranged so as not to come into contact with the H-shaped steel 3 made of ordinary steel. It is possible to electrically insulate between the steel sheet pile 1A and the stainless steel sheet pile 2A, thereby preventing corrosion caused by contact between dissimilar metals and formation of a battery. The steel sheet pile 1A may also be arranged so as not to contact the H-section steel 3. The same corrosion prevention effect can be obtained when connecting steel sheet piles made of different types of steel materials, not limited to ordinary steel and stainless steel. Here, the different types of steel materials refer to steel materials that cause dissimilar metal corrosion when they come into contact. The electrically insulating filler structure is not limited to the concrete structure 4, and may be, for example, fluidized soil.

In the illustrated example, the connection structure further includes a formwork member 5 and lid members 6 and 7. The formwork member 5 contacts the steel sheet pile 1B connected to the steel sheet pile 1A and the steel sheet pile 2B connected to the steel sheet pile 2A, respectively, and contacts the steel sheet piles 1A, 2A and the H-shaped steel 3 disposed therebetween. It is arranged so that it does not occur. The formwork member 5 is electrically insulated between the steel sheet pile 1A side and the steel sheet pile 2A side. Specifically, the formwork member 5 may be formed of an insulating material such as wood, resin, or precast concrete. Alternatively, the form member 5 may be formed of a non-insulating material such as steel, and an insulator may be inserted between the form member 5 and the steel sheet pile. The form member 5 may be in contact with another steel sheet pile connected to the steel sheet piles 1A and 2A, respectively, as in the illustrated example, or may be in contact with the steel sheet piles 1A and 2A.

On the other hand, the lid members 6 and 7 are arranged between both ends of the flange 31 of the H-section steel 3 on the opposite side to the formwork member 5 and each of the steel sheet piles 1A and 2A. Among the lid members 6 and 7, at least the lid member 7 disposed between the steel sheet pile 2A made of stainless steel and the H-section steel 3 is electrically insulating. The lid member 6 on the steel sheet pile 1A side may also be electrically insulating.

By arranging the formwork members 5 and cover members 6, 7 as described above, concrete can be placed in the space surrounded by the steel sheet piles 1A, 2A, the flanges 31 of the H-section steel 3, the cover members 6, 7, and the formwork members 5. Structure 4 can be constructed. For example, when constructing the concrete structure 4 before one side of the steel sheet pile wall is excavated as shown in FIG. It is also possible to construct structure 4. Furthermore, at least one of the formwork member 5 and the lid members 6 and 7 may be removed after the concrete structure 4 is constructed.

In addition, in the connection structure according to another embodiment of the present invention, steel sheet piles made of the same type of metal, for example, ordinary steel, may be connected to each other without being fitted with a joint. In this case, since there is no need to electrically insulate between the steel sheet piles to be connected (steel sheet piles 1A and 2A in the above example), both steel sheet piles are reinforcing members (H section steel 3 in the above example). may be in contact with. Further, in this case, the filler structure (concrete structure 4 in the above example) does not have to be electrically insulating, and the formwork member 5 and lid members 6 and 7 also do not have to be electrically insulating. As the filler structure that is not electrically insulating, it is possible to use, for example, sand or earth that loses its insulating properties when it contains moisture.

Next, a method for connecting steel sheet piles according to the first embodiment of the present invention will be described. The method for connecting steel sheet piles is carried out, for example, during the process of constructing a steel sheet pile wall. For example, in the case of the steel sheet pile wall connection structure described above with reference to FIGS. Pour concrete. Here, the steel sheet pile 1A (and the steel sheet piles 1B and 1C connected to the steel sheet pile 1A by the joint 11) may already be installed, and a long period of time may have passed before the H-beam 3 is cast. It's possible. Alternatively, if steel sheet piles 1A, 1B, 1C made of ordinary steel and steel sheet piles 2A, 2B, 2C made of stainless steel are used together in a series of steel sheet pile walls due to differences in construction conditions, steel sheet piles 1C, steel sheet piles 1B and the steel sheet pile 1A may be sequentially driven while being fitted with the joint 11, and then the H-beam 3 may be driven.

After driving the H-shaped steel 3 into the ground, a steel sheet pile 2A is driven into the ground adjacent to the H-shaped steel 3. At this time, by driving the steel sheet pile 2A so that it does not come into contact with the H-section steel 3, corrosion due to contact between dissimilar metals between the stainless steel sheet pile 2A and the ordinary steel H-section steel 3 is prevented. can do. Note that the H-shaped steel 3 may also be driven so as not to contact the steel sheet pile 1A. Next, on both sides of the H-beam 3, the ground is excavated in an area including the first portion 12A of the steel sheet pile 1A and the second portion 22A of the steel sheet pile 2A, and the excavated area is filled with concrete. Build a concrete structure 4. At this time, the form member 5 and the lid members 6, 7 may be arranged to surround the excavated area, and the inside of the form member 5 and the lid members 6, 7 may be filled with concrete. In the example shown in FIG. 1, since the form member 5 contacts the steel sheet pile 2B connected to the steel sheet pile 2A, the steel sheet pile 2B may be driven before the form member 5 is placed. As mentioned above, the concrete structure 4 only needs to be constructed in the part where the steel sheet piles 1A and 2A are exposed on one side of the steel sheet pile wall. It is sufficient to carry out the excavation to the same depth as or slightly deeper than the planned excavation depth.

In parallel with the above steps or after the above steps, the steel sheet piles 2B and 2C connected to the steel sheet pile 2A are sequentially cast while being fitted with the joints 21, thereby forming the steel sheet piles 1A, 2C. A steel sheet pile wall is constructed in which the steel sheet piles 1B, 1C and the steel sheet piles 2A, 2B, and 2C are connected. In addition, in the above example, the steel sheet piles 1A, 1B, and 1C made of ordinary steel were driven first, but in other examples, even if the steel sheet piles 2A, 2B, and 2C made of stainless steel were driven first. good. In addition, if there is enough distance between the steel sheet pile 1A and the steel sheet pile 2B, or if contact between the steel sheet pile 1A and the H-section steel 3 is allowed, the The step of driving the steel sheet pile 2A may be performed first.

FIG. 3 is a plan view of a steel sheet pile connection structure according to a second embodiment of the present invention. In the illustrated example, a steel sheet pile wall is constructed of steel sheet piles 1A, 1B, and 1C made of ordinary steel, and steel sheet piles 2A, 2B, and 2C are made of stainless steel, as in the first embodiment. The steel sheet pile wall is connected to the steel sheet pile wall. As a difference from the first embodiment, in this embodiment, the connection structure does not include a formwork member. Instead, in this embodiment, in addition to the lid members 6A, 7A (same as the lid members 6, 7 in the example of FIG. 1) on the side where the ground is excavated, the lid members 6B, 7B on the ground side are arranged. . Specifically, the lid members 6B and 7B are arranged between both ends of the flange 31 of the H-shaped steel 3 on the ground side, that is, on the opposite side from the lid members 6A and 7A, and the steel sheet piles 1A and 2A, respectively. be done. Of the lid members 6A and 7B, at least the lid member 7B disposed between the stainless steel sheet pile 2A and the H-beam 3 is electrically insulating. The lid member 6B on the steel sheet pile 1A side may also be electrically insulating. By arranging the lid members 6A, 6B, 7A, and 7B as described above, the concrete structure 4 can be constructed in the space surrounded by the flange 31 of the H-section steel 3 and the lid members 6A, 6B, 7A, and 7B. I can do it.

According to the above configuration, similar to the first embodiment described above, even in a connection structure in which the joints 11 and 21 do not fit into each other, it is possible to maintain the same cross-sectional performance as the connection by joints. Additionally, by reducing the area to be excavated, the amount of concrete used can be reduced. Note that the modifications described in the first embodiment above regarding each part except the formwork member can be similarly applied to the second embodiment.

FIG. 4 is a plan view of a steel sheet pile connection structure according to a third embodiment of the present invention. In the illustrated example, a steel sheet pile wall is constructed by connecting steel sheet piles 1P and 1Q made of ordinary steel to each other with a joint 11, and a steel sheet pile wall constructed by connecting steel sheet piles 2P and 2Q made of stainless steel to each other with a joint 21. The constructed steel sheet pile walls are connected. Although the steel sheet pile 1P and the steel sheet pile 2P are located adjacent to each other in a series of steel sheet pile walls, the joints 11 and 21 do not fit into each other. Between the steel sheet pile 1P and the steel sheet pile 2P, a T-shaped steel 3A is driven into the ground as a reinforcing member adjacent to each steel sheet pile. The T-shaped steel 3A is arranged so that the flange (horizontal bar part of the T-shape) faces the extension direction of the steel sheet pile wall, and has a part (first part) of the steel sheet pile 1P and a part (first part) of the steel sheet pile 2P. 2) are positioned so as to overlap the flanges of the T-shaped steel 3A. Concrete structures 4 are constructed on both sides of the T-shaped steel 3A, and the first part of the steel sheet pile 1P, the second part of the steel sheet pile 2P, and the part of the T-shaped steel 3A except for one side of the flange are constructed of concrete structures. It is fixed at 4.

In this embodiment, the connection structure further includes lid members 6 and 7 similar to those in the first embodiment, and a formwork member 5A having a shape different from that in the first embodiment. The form member 5A is arranged so as to contact the steel sheet pile 1P and the steel sheet pile 2P, respectively, and not to contact the T-shaped steel 3A. 5 A of formwork members are electrically insulated between the steel sheet pile 1P side and the steel sheet pile 2P side similarly to the formwork member 5 in 1st Embodiment. For example, the frame member 5A and the lid members 6 and 7 may be a common member, specifically, a plate-like member formed of the same insulating material. As described above, in this specification, what is placed between the steel sheet piles is referred to as a formwork member, and what is placed between the steel sheet piles and the reinforcing member (T-shaped steel 3A in the example of FIG. 4) is referred to as a cover member. However, these are only distinguished for the sake of explanation, and substantially the same member may be used as the formwork member and the lid member.

According to the above configuration, similar to the first embodiment described above, even in a connection structure in which the joints 11 and 21 do not fit into each other, it is possible to maintain the same cross-sectional performance as the connection by joints. Further, as in the second embodiment described above, the amount of concrete used can be reduced by reducing the area to be excavated. However, by changing the reinforcing member from H-beam steel to T-beam steel, the cross-sectional rigidity becomes smaller, so in the case where H-beam steel is used as in the first and second embodiments and in the third embodiment, The example of using T-shaped steel is preferably selected depending on the magnitude of the back earth pressure of the steel sheet pile wall, for example. Note that the modification described in the first embodiment above can be similarly applied to the third embodiment.

Although preferred embodiments of the present invention have been described above in detail with reference to the accompanying drawings, the present invention is not limited to such examples. It is clear that a person with ordinary knowledge in the technical field to which the present invention pertains can come up with various changes or modifications within the scope of the technical idea described in the claims. It is understood that these also fall within the technical scope of the present invention.

1A, 1B, 1C, 1P, 1Q, 2A, 2B, 2C, 2P, 2Q... Steel sheet pile, 3... Reinforcement member (H section steel) 3A... Reinforcement member (T section steel), 4... Filler structure (concrete) structure), 5, 5A... formwork member, 6, 7, 6A, 6B, 7A, 7B... lid member, 11, 21... joint, 12A... first part, 22A... second part, 31... flange , 32...web.

Claims (11)

A first steel sheet pile driven underground;
a reinforcing member driven into the ground adjacent to the first steel sheet pile;
a second steel sheet pile driven into the ground adjacent to the reinforcing member;
A first part constructed on both sides of the reinforcing member and including at least a first joint of the first steel sheet pile, a second part including at least a second joint of the second steel sheet pile , and the reinforcement. a filler structure to which at least a portion of the member is anchored;
Equipped with
the first joint and the second joint do not fit into each other,
The first portion and the second portion are made of steel sheet piles that are arranged to overlap with the reinforcing member in the extension direction of the steel sheet pile wall formed by the first steel sheet pile and the second steel sheet pile. Connected structure. the filler structure is electrically insulating;
The steel sheet pile connection structure according to claim 1, wherein either or both of the first steel sheet pile and the second steel sheet pile do not contact the reinforcing member. The steel sheet pile connection structure according to claim 2, wherein the first steel sheet pile and the second steel sheet pile are formed of mutually different types of steel materials. The steel sheet pile connection structure according to claim 3, wherein the first steel sheet pile is made of ordinary steel, and the second steel sheet pile is made of stainless steel. Claims 2 to 4, further comprising a pair of lid members, at least one of which is electrically insulating, and which are arranged between the reinforcing member and each of the first steel sheet pile and the second steel sheet pile. The connection structure of steel sheet piles according to any one of the items. Corresponding to the first steel sheet pile, or another steel sheet pile connected to the first steel sheet pile, and the second steel sheet pile, or another steel sheet pile connected to the second steel sheet pile, respectively. further comprising a formwork member in contact with the reinforcing member and electrically insulated between at least the first steel sheet pile side and the second steel sheet pile side,
The filler structure is constructed in a space surrounded by the first steel sheet pile, the second steel sheet pile, the reinforcing member, the pair of lid members, and the formwork member. The steel sheet pile connection structure described. The reinforcing member is an H-shaped steel,
the first portion and the second portion are located in an area surrounded by the web and flange of the H-section steel;
The pair of lid members are arranged between both ends of the flange of the H-shaped steel on the opposite side from the formwork member and each of the first steel sheet pile and the second steel sheet pile,
The filler structure includes the first steel sheet pile, the second steel sheet pile, a flange of the H section steel on the opposite side to the formwork member, the pair of lid members, and the formwork member. The steel sheet pile connection structure according to claim 6, which is constructed in an enclosed space. an additional pair of lids arranged between the reinforcing member and each of the first steel sheet pile and the second steel sheet pile on the opposite side to the pair of lid members, at least one of which is electrically insulating; further comprising a member;
The steel sheet pile connection structure according to claim 5, wherein the filler structure is constructed in a space surrounded by the reinforcing member, the pair of lid members, and the additional pair of lid members. a step of driving a reinforcing member into the ground adjacent to the first steel sheet pile placed into the ground;
Driving a second steel sheet pile into the ground adjacent to the reinforcing member;
On both sides of the reinforcing member, the ground in an area including a first part that includes at least the first joint of the first steel sheet pile , and a second part that includes at least the second joint of the second steel sheet pile. a step of excavating the
filling a region where the ground has been excavated with a filler material to construct a filler structure in which the first portion, the second portion, and at least a portion of the reinforcing member are anchored. fruit,
the first joint and the second joint do not fit into each other,
The first portion and the second portion are made of steel sheet piles that are arranged to overlap with the reinforcing member in the extension direction of the steel sheet pile wall formed by the first steel sheet pile and the second steel sheet pile. Connection method. the filler structure is electrically insulating;
In the step of driving the reinforcing member into the ground, the reinforcing member is driven so as not to contact the first steel sheet pile, or in the step of driving the second steel sheet pile, the reinforcing member is driven into the ground so as not to contact the first steel sheet pile. The method for connecting steel sheet piles according to claim 9, wherein the sheet piles are driven so as not to contact the reinforcing member. surrounding the area where the ground has been excavated,
a pair of lid members arranged between the reinforcing member and each of the first steel sheet pile and the second steel sheet pile, at least one of which is electrically insulating;
Corresponding to the first steel sheet pile, or another steel sheet pile connected to the first steel sheet pile, and the second steel sheet pile, or another steel sheet pile connected to the second steel sheet pile, respectively. further comprising the step of arranging a formwork member that is in contact with and electrically insulated between at least the first steel sheet pile side and the second steel sheet pile side,
The method for connecting steel sheet piles according to claim 10, wherein in the step of constructing the filler structure, the insides of the pair of lid members and the formwork member are filled with the filler.

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