JP2013224558A - Connection jig, connected walls connected by the connection jig and repair method of steel sheet pile using the connection jig - Google Patents

Abstract

PROBLEM TO BE SOLVED: To create a connection jig with which frame bodies (remaining mold frames) can be connected easily, connected walls which are connected by the connection jig, and a repair method of a steel sheet pile using the connection jig.SOLUTION: A connection jig comprises a first base member (11) which is installed within a mount groove (4) which is formed in a frame body (1), a hold member (12) in which a holding part (12b) protruding from base portions (12a) at both sides is formed in the center, a fixing member (13) which fixes the first base member (11) and the hold member (12) to the frame body (1), a second base member (14) which includes in both ends held parts (14c) which can be freely inserted between the hold member (12) and the frame body (1) opposed to the hold member, and in which a deposition part (14d) is provided vertically between the held parts (14c) in both the ends, and a joint member (16) of which one end is welded to a steel sheet pile (20) and of which the other end is welded to the deposition part (14d).

Description

  The present invention relates to a connecting jig for repairing a steel sheet pile, a connecting wall connected by the connecting jig, and a steel sheet pile repairing method using the connecting jig.

  Many agricultural irrigation facilities and urban rivers were concentrated in the post-war high growth period. Among them, steel sheet pile revetments have been used for the maintenance of many agricultural canals and urban rivers because of their economic efficiency and ease of construction. I'm about to meet you.

  The cause of aging of steel sheet piles is, for example, corrosion due to rust, but corrosion in the vicinity of the water surface due to repeated exposure to the water surface or sedimentation under the water surface is particularly severe. The deterioration of water quality due to the urbanization of agricultural areas, that is, the progress of corrosion of steel sheet piles due to the inflow of domestic wastewater from households into irrigation channels and drainage channels, is a problem.

  If such corrosion is left unattended, the strength of the steel sheet pile will be reduced and it will no longer function as a revetment. This is inefficient for a facility with some remaining parts, and the cost burden is very large, so it is not realistic in the current financial situation.

Therefore, it is appropriate to perform repairs. As a conventional repair method for steel sheet pile revetments, for example, the following patent documents are recognized.
The repair method described in Patent Document 1 performs a repair process in which a blasting device sprays a repair agent formed by mixing a polishing agent and a water-soluble rust preventive agent on the surface of a steel sheet pile in which rust has occurred. In addition to removing rust on the surface of the steel sheet pile corroded by the abrasive action of the abrasive, a rust preventive agent is adhered to the surface of the steel sheet pile, and then a property curing agent that cures when liquid is added to the surface of the steel sheet pile. A reinforcing process is performed by spraying a reinforcing agent made by mixing a water-soluble rust inhibitor into a liquid with a blasting device, and a reinforcing layer having a rust preventing action is formed on the surface of the steel sheet pile by the hardening action of the hardener. It is said to be.

  In addition, the repair method described in Patent Document 2 as the second embodiment is to remove the deposits such as shells and algae attached to the surface of the steel sheet pile as necessary, and polish the surface of the steel sheet pile by sandblasting. Then, the stud bolt 17 is welded onto the iron plate (steel sheet pile) 16, and a frame 18 (iron plate, FRP plate) provided with a certain gap from the surface of the iron plate 16 is attached. Then, a synthetic resin (an underwater curable epoxy resin) is filled between the iron plate 16 and the frame body 18. When the frame 18 is an iron plate, an FRP outer frame 21 is attached to the outer side of the frame 18 via a stud bolt 20, and a synthetic resin is filled between the frame 18 and the outer frame 21. Is.

JP 2012-2010 A Japanese Patent Laid-Open No. 5-98659

  However, in the repair method described in Patent Document 1, when spraying a rust inhibitor or a reinforcing agent (mixture of a curing agent and a water-soluble rust inhibitor) onto the surface of a steel sheet pile, the quality of construction is such as rainy weather. There is a problem that peeling is caused in the reinforcing layer that is easily influenced and the reinforcing agent is hardened.

  Further, in the repair method described in Patent Document 1, it is described that a resin-based curing agent is used. However, since synthetic resins are easily deteriorated by the influence of ultraviolet rays, they are inferior in weather resistance compared to concrete materials. There is.

  Further, in Patent Document 2, there is no problem when the first frame is fixed. However, when installing the second and subsequent frames next to the previously fixed frame and fixing them to the steel sheet pile, insert your hand into the narrow gap between the steel sheet pile and the previous frame. In particular, the work of fixing the lower end side of the frame is difficult, and there is a problem that the work efficiency is very poor.

  Further, in Patent Document 2, there is a problem that the tip end of the stud bolt 20 is exposed to the outside of the outer frame 21 and installed in water or in the air, so that it is easily corroded.

  The present invention was invented to solve the above-described problems in the prior art, and by appropriately repairing existing steel sheet piles, corrosion was surely prevented, and the facility was made to have a long service life. In order to contribute to the reduction of life cycle cost by effectively utilizing the facilities, a connecting jig that can easily connect frame bodies (remaining molds) and a connecting wall connected by the connecting jig An object is to create a steel sheet pile repair method using a connecting jig.

Of the means for solving the above problems, the main configuration of the first invention is:
It is a connecting jig for a frame for connecting the frames arranged opposite to the steel sheet pile,
A first base member installed in a mounting groove formed in the frame body, a holding member formed in the center with a holding portion protruding from the bases on both sides, and the first base member and the holding member are fixed to the frame body The second base is provided with a holding member that can be freely inserted between a fixing member to be held and a holding member and a frame opposite to the holding member at both ends, and a welded portion is vertically provided between the holding portions at both ends. It has a member and the joining member by which one end is welded to a steel sheet pile, and the other end is welded to a welding part.

  In the main configuration of the first aspect of the present invention, it is possible to facilitate the connection work between adjacent frames (for example, remaining molds).

  According to another aspect of the present invention, in the first aspect of the invention, the first base member has a U-shaped main body portion and a hat shape including both flange portions projecting laterally from both ends of the main body portion. It is said that a slit groove in which both flanges can be inserted is formed at the lower ends of both side walls which are formed of steel and form a mounting groove on the frame side.

  With the above configuration, the first base member can be reliably attached to the frame.

  According to another aspect of the present invention, in the first or second aspect of the present invention, the fixing member is constituted by a bolt, a screw hole is formed in the main body portion of the first base member, and the bolt is formed on the lower surface of the main body portion. It is said that a nut to be screwed is provided integrally with the screw hole.

  With the above configuration, cost reduction and quick attachment are achieved by maintaining the screw strength and reducing the number of parts.

  According to another configuration of the first invention, in the invention according to any one of the first to third aspects, the second base member is formed of channel steel having a U-shaped cross section.

  With the above configuration, the strength of the second base member is improved.

  According to a fourth aspect of the present invention, in the invention according to the fourth aspect of the present invention, a convex portion that can contact the holding portion of the holding member from the vertical direction is provided at the center of both side walls of the channel steel forming the second base member. It is said that.

  In the above-described configuration, the second base member is prevented from being displaced and an arrangement at an intermediate position between the two holding members is achieved.

  The connecting wall according to the second aspect of the invention is characterized in that a plurality of remaining molds are connected by using any of the above-mentioned connecting jigs for frames.

  In the said 2nd invention, the connection wall stable in quality and intensity | strength is achieved by using the thin and light residual formwork produced by a factory.

Further, the third invention is a steel sheet pile repairing method already installed using the connecting jig for a frame according to any one of the above,
A first step of installing a remaining formwork to which a connecting jig is attached at a position separated from the existing steel sheet pile by a predetermined distance;
A second step of welding one end of the joining member to the steel sheet pile and fixing the remaining mold by welding the other end to the welded portion of the connecting jig;
The third step of moving the next remaining mold form next to the previously fixed remaining mold form and connecting the previous remaining mold form and the next remaining mold form via a connecting jig to construct a connecting wall When,
And a fourth step of filling and solidifying concrete or mortar between the connecting wall and the steel sheet pile.

  In the said 3rd invention, since the concrete or mortar filled between the connection wall which connected the some residual formwork, and the steel sheet pile has strong alkalinity, a passive film is formed in the steel sheet pile surface, Achieve corrosion prevention of steel sheet piles.

Since the present invention has the above-described configuration, the following effects can be obtained.
In 1 invention of Claim 1, since it is possible to insert a 2nd base member freely between the holding | maintenance part of a holding member and a frame, Between the frame bodies arranged in parallel Work efficiency is improved by facilitating the connecting work, and the construction period can be greatly shortened and the construction cost can be reduced.

  In addition, the first base member according to claim 2 is formed of a hat-shaped steel having a U-shaped main body portion and both flanges protruding laterally from both ends of the main body portion. In the configuration in which the slit groove into which both flanges can be inserted is formed at the lower ends of both side walls forming the first base member to the frame body can be facilitated, and any number can be placed at any position. It becomes possible to mount, and it is possible to provide a connecting jig that is difficult to drop off after mounting.

  The fixing member according to claim 3 is constituted by a bolt, and a nut in which a screw hole is formed in the main body portion of the first base member and the bolt is screwed to the lower surface of the main body portion is integrated with the screw hole. With the configuration provided in, it is possible to reduce the product cost by maintaining the screwing strength and reducing the number of parts, and it is possible to improve the efficiency of the tightening operation.

  Further, in the configuration in which the second base member is formed of groove-shaped steel having a U-shaped cross section according to claim 4, since the strength of the second base member can be increased, deformation due to external force during work is prevented. At the same time, it is possible to prevent a reduction in work efficiency due to a reduction in replacement work.

  Moreover, in the structure which provided the convex part which can contact | abut to the holding | maintenance part of a holding member from the orthogonal | vertical direction in the center of the both side walls of the channel steel which forms a 2nd base member of Claim 5, one side connected The second base member disposed between the holding member attached to the frame body and the holding member attached to the other frame body is not attached in a state of being offset toward one of the frame bodies, and is always It can be evenly mounted between both holding members. For this reason, it becomes possible to perform the connection operation | work of a frame easily and efficiently.

  In the second aspect of the present invention, a connecting wall configured by connecting a plurality of remaining molds can be obtained by using any of the above-mentioned connecting jigs for a frame.

  In particular, since the remaining mold itself is produced in a factory, it is easy to maintain a stable quality and strength, and to make a thin frame that is excellent in weight reduction. For this reason, since it is not necessary to use a large heavy machine at the time of construction, it is possible to perform construction by human power even in a narrow construction place.

In the third aspect of the present invention, it is possible to prolong the life of the water channel facility and the revetment retaining wall on which the steel sheet pile is laid by preventing corrosion of the steel sheet pile.
Moreover, since the connection wall comprised by connecting a some residual formwork is installed at a predetermined distance from a steel sheet pile, the channel width of a channel facility becomes narrow and a water flow area reduces. However, by using the remaining formwork consisting of a smooth wall surface, the roughness like the steel sheet pile waterway wall surface can be eliminated and the roughness coefficient can be reduced. .

  Further, since the connecting jig is provided inside the remaining mold forming the connecting wall and is not exposed to the water channel surface side, corrosion of the connecting jig itself can be prevented. Therefore, to prevent the occurrence of cracks that cause deterioration in the connecting wall consisting of the residual formwork made of concrete connected using this connecting jig or the concrete or mortar filled between the steel sheet pile and the connecting wall. Thus, the progress of corrosion of the steel sheet pile can be delayed, that is, the life of the steel sheet pile can be extended.

It is a perspective view which shows the relationship between a connection jig and a frame as an Example of this invention. It is a perspective view which shows an example of the process in which adjacent frame bodies (remaining formwork) are connected with a connection jig, and a connection wall is formed. It is a perspective view which shows the state which has arrange | positioned the connection wall which connected the some residual formwork as an example of the repair method of a steel sheet pile facing the steel sheet pile. FIG. 4 is a plan view of FIG. 3. It is a perspective view which shows the state which filled concrete or mortar between the steel sheet pile and the connection wall as an example of the repair method of the steel sheet pile following FIG.

Embodiments of the present invention will be described below with reference to the drawings.
In the following description, the long side direction of the frame (residual mold) will be described as the longitudinal direction, and the direction orthogonal thereto will be described as the width direction.
FIG. 1 is a perspective view showing a relationship between a connecting jig and a frame as an embodiment of the present invention, and FIG. 2 is a process of connecting adjacent frames (remaining molds) with a connecting jig to form a connecting wall. FIG. 3 is a perspective view showing a state in which a connecting wall connecting a plurality of remaining molds is arranged opposite to a steel sheet pile as an example of a steel sheet pile repair method, and FIG. 4 is a plan view of FIG. FIG. 5 and FIG. 5 are perspective views showing a state in which concrete or mortar is filled between the steel sheet pile and the connecting wall as an example of the steel sheet pile repair method continued from FIG.

First, the connecting jig according to the first invention will be described.
As shown in FIG. 1, the connecting jig 10 according to the first invention is a structure that is covered with concrete or mortar and is not exposed to the water channel surface after construction, and therefore, a metal that is particularly excellent in corrosion resistance, such as stainless steel, It does not need to be a metal such as aluminum or titanium, and is configured to include a first base member 11, a holding member 12, a pair of bolts 13, and a second base member 14 formed from a general steel material.

  The first base member 11 is formed of a hat-shaped steel including a main body portion 11a having a U-shaped cross section and both flange portions 11b and 11b protruding in the lateral direction from both ends of the main body portion 11a. A pair of screw holes 11c and 11c are formed in the main body part 11a, and a nut 18 for screwing a bolt is integrally provided on the lower surface of the main body part 11a in accordance with the screw holes 11c and 11c. .

  The holding member 12 has base portions 12a and 12a at both ends in the longitudinal direction, and a holding portion 12b that protrudes and curves in a convex shape from both the base portions 12a and 12a is integrally formed between the base portions 12a and 12a. A pair of through holes 12c and 12c corresponding to the screw holes 11c and 11c of the first base member 11 are formed in both the base portions 12a and 12a. Further, bent portions 12d that are bent in a convex shape are formed at both edges in the width direction of the holding member 12, and the holding member 12 is reinforced so as not to be easily deformed.

  The second base member 14 is formed of channel steel having a pair of side walls 14a, 14a arranged to face each other and having a U-shaped cross section. Protrusions 14b and 14b are provided at the center in the width direction of the side walls 14a and 14a. Further, at both ends in the width direction of the side walls 14a, 14a, held portions 14c, 14c formed by cutting in an inclined shape are provided. Then, a welding portion 14 d having a flat plate shape is suspended from an intermediate position in the width direction of the second base member 14.

Next, an assembling method of the connecting jig 10 will be described. The connecting jig 10 is assembled in a state where it is assembled to the frame 1 as shown in FIG.
The frame 1 is a residual mold made of concrete, and is formed of a plate-like thin portion 2 and a thick portion 3 having a substantially rectangular parallelepiped shape extending in the longitudinal direction. The thick portion 3 is formed at both ends in the width direction of the plate-like thin portion 2 and at a plurality of positions between the both ends.

  In the thick portions 3A provided at both ends in the width direction, mounting grooves 4 extending along the longitudinal direction are respectively formed. The groove width of the mounting groove 4 is formed to be slightly wider than the width dimension of the main body portion 11 a of the first base member 11, and a slit groove having a wider width than the mounting groove 4 is formed at the bottom of the mounting groove 4. 5 and 5 are integrally formed. The width dimension of the slit grooves 5 and 5 is slightly larger than the width dimension between the both flange portions 11b and 11b of the first base member 11, and the height dimension of the slit grooves 5 and 5 is the thickness dimension of both flange portions 11b and 11b. Slightly larger than.

  The first base member 11 is inserted into the slit grooves 5 and 5 from the end of the thick part 3A into the slit grooves 5 and 5 and the body part 11a is inserted into the mounting groove 4 so that the longitudinal direction within the mounting groove 4 is predetermined. It is mounted at the position. Next, the holding member 12 is placed on the upper surface of the thick portion 3 </ b> A, a pair of bolts (fixing members) 13, 13 are inserted into the pair of through holes 12 c, 12 c of the holding member 12, and in the mounting groove 4. The first base member 11 provided is inserted into a pair of screw holes 11c, 11c and screwed. As a result, the first base member 11 and the holding member 12 are fixed to the frame body 1.

  By performing the above-described mounting operation at two positions on both ends of one thick part 3A (four positions on the thick parts 3A and 3A on both sides), four positions of one frame 1 are obtained. A first base member 11 and a holding member 12 constituting the connecting jig 10 are attached at positions.

Next, the connecting wall according to the second invention will be described.
As shown in FIG. 2, one frame body 1 </ b> A and the other frame body 1 </ b> B are arranged in a state where the thick portions 3 </ b> A are opposed to each other and at a distance from each other. Then, one held portion 14c of the second base member 14 is inserted into a gap 15 formed between the upper surface of the thick portion 3A on the one frame body 1 side and the holding portion 12b of the holding member 12. Next, the other frame body 1B is moved to the other frame body 1A, and the distance between them is made closer. At this time, the other held portion 14c of the second base member 14 is inserted into a gap 15 formed between the upper surface of the thick portion 3A on the other frame 1B side and the holding portion 12b of the holding member 12. Is done. By performing such a connecting operation using the second base member 14 on both sides in the longitudinal direction, the connection between the one frame 1A and the other frame 1B is completed.

  The held portion 14c is inserted from the vertical direction (width direction) with respect to the gap 15, but the convex portion 14b abuts on a bent portion 12d formed on one edge in the width direction of the holding portion 12b. The above approach is impossible. For this reason, it is possible to install the 2nd base member 14 in the intermediate position of one frame 1A and the other frame 1B which are always connected. For this reason, the second base member 14 is not attached in a state of being offset toward one of the frame bodies 1, and the frame body 1 can be easily and efficiently connected.

  And it can obtain the connection wall 17 comprised by connecting the some frame 1 by repeatedly performing the attachment operation | work of the above connection jig | tools 10 and a connection operation between the some frame bodies 1. FIG. Yes (see FIG. 3 and FIG. 4).

  By using the connecting jig 10, when connecting the frame bodies 1, there is no need to insert a hand into the gap where one frame body 1 </ b> A and the other frame body 1 </ b> B face each other. Can be made easier and work efficiency can be improved.

  Next, as a third invention, a method for repairing a steel sheet pile with a connecting wall configured by connecting a plurality of frames (residual molds) using the connecting jig will be described.

The frame body 1 with the first base member 11 and the holding member 12 constituting the connecting jig 10 attached at four positions is spaced a predetermined distance from the front position facing the existing steel sheet pile 20 requiring repair. Install.
Then, similarly to the above, one held portion 14 c of the second base member 14 is inserted into the gap 15 between the upper surface of the thick portion 3 </ b> A of the frame 1 and the holding portion 12 b of the holding member 12.

Next, as shown in FIG. 4, a substantially L-shaped joining member 16 is prepared, one end of the joining member 16 is welded to the welded portion 14d of the second base member 14, and the other end is welded to the welded portion 14d. The frame 1 is fixed at a position in front of the steel sheet pile 20 by welding to the wall surface of the steel sheet pile 20 opposite to the steel sheet pile 20.
In addition, the length dimension of the joining member 16 is appropriately selected according to the facing distance between the steel sheet pile 20 and the welded portion 14d.

  Subsequently, the next frame body 1B is installed next to the frame body 1A fixed first. At this time, the other held portion 14c of the second base member 14 attached to the previous frame 1A is placed in the gap 15 between the upper surface of the thick portion 3A of the next frame 1B and the holding portion 12b of the holding member 12. By inserting, the next frame 1B is juxtaposed next to the previous frame 1A.

  By repeating the above operations, a connecting wall 17 constructed by connecting a plurality of frame bodies (remaining molds) 1 by a connecting jig 10 at a position in front of an existing steel sheet pile 20 requiring repair is constructed. can do.

  As shown in FIG. 5, in the last step, the steel sheet pile is completely repaired by filling concrete and mortar 22 between the existing steel sheet pile 20 and the connecting wall 17 and solidifying them.

  In the above repair method, the strong alkalinity of the concrete or the mortar 22 can form a stable passive film on the surface of the steel sheet pile 20, thereby preventing further corrosion of the steel sheet pile 20, Longer life can be achieved.

  In addition, the connecting wall is formed of a remaining formwork consisting of a smooth wall surface, which can conceal the uneven wall surface of the steel sheet pile channel and reduce the roughness coefficient, It is possible to prevent a decrease in the overall flow capacity.

  Further, since the connecting jig 10 can be disposed inside the connecting wall 17, corrosion of the connecting jig 10 itself is prevented, and the connecting wall 17 made of concrete itself or between the steel sheet pile 20 and the connecting wall 17 is prevented. It is possible to prevent the occurrence of cracks that cause deterioration of the filled concrete or mortar 22, and also in this respect, it is possible to realize a long life of the steel sheet pile.

  In particular, in the case where the frame body 1 is composed of a remaining mold, the remaining mold is manufactured in a factory with a good quality control, and therefore has not only a quality but also a thin, light and strong strength. For this reason, a large-sized heavy machine is unnecessary at the time of construction of the frame 1, and construction by human power is also possible from the inside of a waterway even in a narrow construction place.

As mentioned above, although the structure of this invention and its effect were demonstrated along the Example, embodiment of this invention is not limited to the said Example.
For example, in the said Example, the structure which provided integrally the nut 18 for screwing a volt | bolt to the lower surface of the main-body part 11a of the 1st base member 11 which consists of hat-shaped steel according to the screw holes 11c and 11c was shown. Although described above, the present invention is not limited to this, and may be a configuration in which a screw groove is integrally screwed into the screw hole itself, or a configuration in which the screw is fixed with a nut provided separately. Also good. However, it is preferable to adopt the configuration of the present embodiment in terms of maintaining screwing strength, reducing the number of partial points, and improving the efficiency of attachment work.

  In the above-described embodiment, the configuration using the bolt as the fixing member 13 has been shown and described. However, the fixing member 13 can also be configured by other members such as a clip. However, it is preferable to use the bolts 13 as shown in the above-described embodiment in terms of screw strength and cost.

1, 1A, 1B, 1C, 1D; Frame (residual mold)
2; Thin part 3; Thick part 3A; Thick part 4 at both ends; Mounting groove 5; Slit groove 10; Connecting jig 11; First base member 11a; Main body part 11b; Base 12b; Holding portion 12c; Through hole 12d; Bending portion 13; Bolt (fixing member)
14; second base member 14a; side wall 14b; convex portion 14c; held portion 14d; welded portion 15; gap 16; joint member 17; connecting wall 18; nut 20;

Claims (7)

It is a connecting jig for a frame for connecting the frames (1) opposed to the steel sheet pile (20),
A first base member (11) installed in a mounting groove (4) formed in the frame (1) and a holding part (12b) raised from the base parts (12a) on both sides are formed in the center. A fixing member (13) for fixing the member (12), the first base member (11), and the holding member (12) to the frame body (1); and the holding member (12) facing the holding member (12). A second base having a held portion (14c) that can be freely inserted between the frame body (1) at both ends and a welded portion (14d) suspended between the held portions (14c) at both ends. A frame connection comprising: a member (14); and a joining member (16) having one end welded to the steel sheet pile (20) and the other end welded to the welded portion (14d). jig.   The first base member (11) is formed of a hat-shaped steel provided with a body portion (11a) having a U-shaped cross section and both flange portions (11b) projecting laterally from both ends of the body portion (11a), The connecting jig for a frame according to claim 1, wherein a slit groove (5) into which the both flanges (11b) can be inserted is formed at the bottom of the mounting groove (4) on the frame (1) side.   The fixing member (13) is constituted by a bolt, a screw hole (11c) is formed in the main body (11a) of the first base member (11), and the bolt is screwed to the lower surface of the main body (11a). The connecting jig for a frame according to claim 1 or 2, wherein a nut to be integrated is provided integrally with the screw hole (11c).   The connecting jig for a frame according to any one of claims 1 to 3, wherein the second base member (14) is formed of channel steel having a U-shaped cross section.   The convex part (14b) which can be contact | abutted from the perpendicular direction to the holding | maintenance part (12b) of a holding member (12) was provided in the center of the both-sides wall (14a) of the channel steel which forms a 2nd base member (14). Item 5. A connecting jig for a frame according to Item 4.   6. A connecting wall comprising a plurality of remaining molds (1) connected using the connecting jig for a frame according to any one of claims 1 to 5. A repair method for a steel sheet pile that is already installed using the connecting jig for a frame according to any one of claims 1 to 5,
A first step of installing a remaining formwork (1) to which a connecting jig (10) is attached at a predetermined distance from an existing steel sheet pile (20);
A second step of fixing the remaining mold (1) by welding one end of the joining member (16) to the steel sheet pile (20) and welding the other end to the welded portion (14d) of the connecting jig (10); ,
The next remaining mold (1B) is moved next to the previously fixed remaining mold (1A), and the previous remaining mold (1A) and the next remaining mold (1B) are connected to the connecting jig ( A third step of connecting via 10) to build the connecting wall (17);
A repair method for steel sheet piles, comprising: a fourth step of filling and solidifying concrete or mortar (22) between the connecting wall (17) and the steel sheet pile (20).

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