Reinforcement method and reinforcement structure for existing steel sheet piles

Abstract

To provide a reinforcement method and a reinforcement structure for an existing steel sheet pile which can reform an existing steel sheet pile without removing the existing steel sheet pile, and is excellent in not only workability and economical efficiency but also certainty and quality (reliability), even in a state where deterioration progresses to the extent that the existing steel sheet pile cannot be repaired.SOLUTION: Wall structures 11 composed of strut materials 1, horizontal beam members 2 and wall materials 3 are constructed each insides of facing existing steel sheet piles 10, the facing wall structures are supported by trim beams 4, and spaces between the existing steel sheet piles and the wall structures are filled with a filler, to be integrated with each other. Furthermore, a decorative panel material 9 is provided in the insides of the wall structures, each of the spaces among the existing steel sheet piles, the wall structures and the decorative panel material is filled with a filler, to be integrated with each other.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] This invention belongs to the technical field of reinforcing existing steel sheet piles that are mainly used as revetments for water channels in agricultural water conservancy facilities.

Background Art

[0002] As part of the postwar irrigation and drainage projects, water channels (hereinafter referred to as water channels) connecting to rivers around farmland have been developed. Many of these water channels for agricultural operations are formed by continuously driving steel sheet piles on both sides due to good constructability and economy. However, the reality is that most of them are still being used without proper repair. However, many of the steel sheet piles used as revetments for water channels have been in use for decades since construction and are aging. There are concerns about a decrease in the strength and rigidity of the steel sheet piles and, by extension, the revetment due to corrosion of the steel material (especially corrosion in the dry-wet zone). Therefore, in recent years, various techniques have been proposed to prevent corrosion and extend the lifespan of water channel facilities by appropriately repairing these aged existing steel sheet piles (see, for example, Patent Documents 1 to 5).

[0003] Patent Document 1 discloses a method for reinforcing a steel sheet pile by reinforcing a corroded part of the steel sheet pile (11) with a reinforcing steel plate (21) and tensioning it with a prestressed steel material (27) (see Fig. 2, etc.). Patent Document 2 discloses a linear steel sheet pile wall (23) provided with a wide-width panel-shaped steel sheet pile (22) formed by joining protrusions (19) such as H-shaped steel inside an existing steel sheet pile wall (3), and a repair revetment structure and repair method for an aged sheet pile revetment in which a time-dependent curable material (26) is filled between the existing steel sheet pile wall (3) and the linear steel sheet pile wall (23) (see Fig. 2).

[0004] Patent Document 3 discloses a method for repairing a steel sheet pile by constructing a connecting wall (17) formed by connecting a remaining formwork (1A, etc.) inside an existing steel sheet pile (20) and filling and solidifying concrete or mortar (22) between the existing steel sheet pile (20) and the connecting wall (17) (see Claim 7, Fig. 5). Patent Document 4 discloses a repair method for steel sheet piles, in which a panel material (4) provided with a latching rail (3) or a latching member is latched onto an existing steel sheet pile (1) provided with a latching rail inside, and a filler such as concrete (5) is filled between the existing steel sheet pile (1) and the panel material (4) (see Fig. 1 etc.).

[0005] Patent Document 5 discloses a reinforcing structure and a reinforcing method for an existing steel sheet pile wall, which include a reinforcing member (5) installed vertically in contact with the surface of a recess of the existing steel sheet pile wall (3), a lower cut beam structure (7) that integrally supports the lower part of the reinforcing member (5) and the lower part of the existing steel sheet pile wall (3), and an upper cut beam structure (9) constructed at the upper end of the reinforcing member (5) that integrally supports the upper end of the reinforcing member (5) and the upper part of the existing steel sheet pile wall (3). The lower cut beam structure (7) and the upper cut beam structure (9) are provided with a web raising member (15) and a cut beam member (17) that horizontally supports the web raising member (15) (see Fig. 1 etc.).

[0006] The inventions disclosed in the above Patent Documents 1 to 5 are all technologies for repairing by utilizing the strength of an existing steel sheet pile, such as applying welding means to the existing steel sheet pile. As described in the effect sections of the inventions in each document, they can exert a certain effect as a repair technology for the existing steel sheet pile.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Summary of the Invention

Problems to be Solved by the Invention

[0008] However, as described above, the inventions disclosed in Patent Documents 1 to 5 are limited to the so-called repair techniques for existing steel sheet piles. When the aging has further progressed to the stage where the damage to the existing steel sheet piles is severe and the strength cannot be expected, there is no longer any way to deal with it. Currently, the only means of dealing with it is to remove the existing steel sheet piles and drive new steel sheet piles again.

[0009] The technique of driving new steel sheet piles again has problems in that the waterway is already in use and it is difficult to carry out large-scale construction as in the construction period. Also, when a bridge is erected above, there is a problem that the presence of the girders gets in the way and the construction is difficult.

[0010] The present invention has been devised in view of the problems of the above-described background art, and the object thereof is to provide a reinforcement method and a reinforcement structure for an existing steel sheet pile that are excellent in workability, economy, certainty, and quality (reliability), and can be reinforced without using the strength of the existing steel sheet pile and without removing it, even at the stage where the existing steel sheet pile has deteriorated so much that it cannot be repaired. Moreover, it is to provide a reinforcement method and a reinforcement structure for an existing steel sheet pile that can be reinforced without using the strength of the existing steel sheet pile and without removing it, and are excellent in workability, economy, certainty, and quality (reliability).

Means for Solving the Problems

[0011] As a means for solving the above problems, the reinforcement method for an existing steel sheet pile according to the invention described in claim 1 constructs a wall structure body composed of a column member, a cross beam member, and a wall member on the inner sides of the opposing existing steel sheet piles respectively, and cuts the opposing wall structure bodies with a cross beam, and fills a filler between the existing steel sheet pile and the wall structure body to integrate the two. Without connecting to the existing steel sheet pile After constructing the wall structure body, a hooked rail is provided horizontally inside the wall structure body, and a decorative panel material provided with a hooking rail or a hooking member that can mesh with each other to the hooked rail is attached to the wall structure body by hooking the hooking rail or the hooking member to the hooked rail. , provided between the wall structures with a cross beam Connection and fills a filler between the existing steel sheet pile and the wall structure body to integrate the two.

[0012] The invention described in claim 2 is, in the reinforcement method for an existing steel sheet pile described in claim 1, after constructing the wall structure body, a hooked rail is provided horizontally inside the wall structure body, and a decorative panel material provided with a hooking rail or a hooking member that can mesh with each other to the hooked rail is attached to the wall structure body by hooking the hooking rail or the hooking member to the hooked rail.Before It is characterized in that a filler is filled between the existing steel sheet pile, the wall structure, and the decorative panel material to integrate the three.

[0013] The invention described in claim 3 is characterized in that, in the method for reinforcing an existing steel sheet pile described in claim 1 or 2, communication holes for passing the filler are formed in the wall material of the wall structure. The invention described in claim 4 is characterized in that, in the method for reinforcing an existing steel sheet pile described in any one of claims 1 to 3, the wall material is a liner plate, a steel sheet pile, or a corrugated steel plate.

[0014] The reinforcing structure of the existing steel sheet pile according to the invention described in claim 5 is such that a wall structure composed of a strut material, a cross beam material, and a wall material is respectively erected inside the opposing existing steel sheet piles. Without connecting to the existing steel sheet pile erected, and the opposing wall structures , provided between the wall structures are cut by a cross beam Connection and a filler is filled between the existing steel sheet pile and the wall structure to integrate the two.

[0015] The invention described in claim 6 is such that, in the reinforcing structure of the existing steel sheet pile described in claim 5, a hooked rail is provided horizontally inside the wall structure, and a decorative panel material provided with a hooking rail or a hooking member that can mesh with each other to the hooked rail is attached to the wall structure in a state where the hooking rail or the hooking member and the hooked rail are meshed. Before It is characterized in that a filler is also filled between the decorative panel material and the wall structure to integrate the two.

[0016] The invention described in claim 7 is characterized in that, in the reinforcing structure of the existing steel sheet pile described in claim 6, communication holes for passing the filler are formed in the wall material of the wall structure. The invention described in claim 8 is characterized in that, in the reinforcing structure of the existing steel sheet pile described in any one of claims 5 to 7, the wall material is a liner plate, a steel sheet pile, or a corrugated steel plate.

Advantages of the Invention

[0017] According to the method and structure for reinforcing an existing steel sheet pile according to the present invention, even when the existing steel sheet pile has deteriorated to such an extent that it cannot be repaired, it can be sufficiently reinforced without interrupting the role of the water channel, without using the strength of the existing steel sheet pile, and without removing it. Furthermore, the wall structure can exhibit the same strength as the existing steel sheet pile at the time of new construction. Therefore, it is possible to realize a method and structure for reinforcing an existing steel sheet pile that are extremely excellent in workability, economy, certainty, and quality (reliability).

Brief Description of the Drawings

[0018]

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Mode for Carrying Out the Invention

[0019] Next, an example of the method for reinforcing an existing steel sheet pile and the reinforcing structure according to the present invention will be described with reference to the drawings. <When implementing the wall material with a liner plate>

Example

[0020] As shown in FIGS. 1 to 4, the method for reinforcing an existing steel sheet pile according to the present invention constructs a wall structure 11 composed of a column member 1, a cross beam member 2, and a wall material 3 inside the opposing existing steel sheet piles 10, 10 respectively. Without connecting to the existing steel sheet piles 10, 10 Constructs, and cuts the opposing wall structures 11, 11 , provided between the wall structures 11, 11 with a cut beam 4 Connection and fills a filler (not shown) between the existing steel sheet pile 10 and the wall structure 11 to integrate the two 10, 11. Reference numeral 5 in FIG. 1 indicates a cut beam attachment member.

[0021] The wall structure 11 is constructed by assembling it into a wall shape by joining a cross beam member 2 and a liner plate 3 with bolts 7 and nuts 8 between the column members 1, 1 which are erected at a predetermined interval. The wall structure 11 according to this embodiment is formed with a height dimension that fits on the lower surface of the hat-shaped concrete block 30 inside the existing steel sheet pile 10, and has a length required in the extension direction of the water channel, and is installed on the bottom 20 of the water channel. Incidentally, in this embodiment, H-shaped steel is adopted for the column members 1 and the cross beam member 2, and a straight type (linear) liner plate 3 is adopted for the wall material 3. Vertical flanges 3a are formed at the left and right ends of the liner plate 3, and horizontal flanges 3b are formed at the upper and lower ends.

[0022] As shown in Fig. 3 for easy understanding, when the wall structure 11 according to this embodiment is formed with a length required in the extension direction of the water channel, taking the column members (H-shaped steel) 1, 1 with a height of about 1.7 m erected at a predetermined interval (about 4.8 m) as one span, between one span, the cross beam members (H-shaped steel) 2 are arranged in four stages with substantially equal intervals vertically, and the liner plate 3 is flange-joined to fill the gaps between the upper and lower cross beam members 2, 2 to form a wall shape.

[0023] For the four-stage cross beam members 2, three cross beam members 2 with a length of about 1.6 m are used for each stage and joined together through a joint plate 6, and both ends (flange portions) thereof are joined to the adjacent column members 1, 1 (flange portions) with bolts 7 and nuts 8 for erection (see Fig. 4A). When performing bolt joining work using the joint plate 6, for the joining work on the side of the existing steel sheet pile 10 where the working space is narrow, measures such as using the flat type of joint plate disclosed in Japanese Patent Application Laid-Open No. 2011-140794 applied by the applicant are appropriately carried out.

[0024] Each liner plate 3 is about 1.6 m long, about 50 cm high, and has flanges 3a, 3b with widths of about 5.5 cm, and three or four are arranged between the upper and lower cross beam members 2, 2. Reference numeral 3' in Fig. 3 indicates a half-size liner plate. In this embodiment, the liner plates 3 are arranged in a staggered pattern to efficiently increase the strength of the wall structure 11.

[0025] For reference, the sizes of the main components are as follows: the cross-sectional size of the support material (H-shaped steel) 1 is H200 x 200 x 8 x 12 mm, the cross-sectional size of the cross beam material (H-shaped steel) 2 is H150 x 150 x 7 x 10 mm, and the plate thickness t of the liner plate (wall material) 3 is 2.7 mm.

[0026] Thus, the wall structure 11 according to this embodiment is constructed in such a way that the one span configuration is continued to the left and right for a required length as a basic form. In actual construction, after carrying out preparatory work such as diverting water in the waterway, high-pressure washing, and leveling as necessary, the support material 1 and the lowest cross beam material 2 are joined at a right angle, a liner plate 3 is placed on top of the cross beam material 2, and the horizontal flanges 3b are used to join the flange parts of the cross beam material 2 with bolts 7 and nuts 8, while adjacent liner plates 3, 3 are joined together with the vertical flanges 3a with bolts 7 and nuts 8. These joining methods are well known and so a detailed explanation is omitted here.

[0027] Thereafter, formwork (not shown) is installed at key points such as both ends of the wall structure 11 that has been formed to the required length in the extension direction of the waterway, thereby forming a closed space when viewed from above. Filling material is then filled into the closed space from above, for example through filling holes provided by penetrating the cap concrete block 30 vertically. After filling the closed space with the filling material, it is cured, thereby constructing a reinforcing structure for the existing steel sheet pile.

[0028] Incidentally, although not shown in the drawings, solidifying materials such as concrete and mortar are used as the filling material. The filling holes provided in the hat-shaped concrete block 30 are closed after the filling operation. Moreover, the size of the wall structure 11 is of course not limited to this, and it can be appropriately designed according to the height dimension of the water channel to which the present invention is applied. For example, the interval between the column members 1, the length, the number of joints, the number of steps of the cross beam members 2, or the size per sheet of the liner plate 3 can be appropriately designed and changed for implementation.

[0029] Therefore, in the reinforcement method of the existing steel sheet pile 10 according to the present invention, the wall structures 11 having the above-described configuration are respectively provided inside the opposing existing steel sheet piles 10, 10. Without connecting to the existing steel sheet piles 10, 10 constructed, and the opposing wall structures 11, 11 are , provided between the wall structures 11, 11 cut by the cut beam 4 Connection and at the same time, a filling material is filled between the existing steel sheet pile 10 and the wall structure 11 to integrate the two. Incidentally, the virtual line labeled 10 in FIG. 2 schematically shows the installation position of the existing steel sheet pile 10.

[0030] The cut beam 4 according to the present embodiment is implemented by joining both ends to cut beam attachment members 5, 5 fixed to the flange surfaces of the opposing column members 1, 1 by joining means such as welding. In this embodiment, both the cut beam 4 and the cut beam attachment member 5 are made of H-shaped steel having the same cross-sectional size (for example, H100×100×6×8 mm). The interval between the opposing wall structures 11, 11 is about 150 cm, the protruding dimension of the cut beam attachment member 5 is about 10 cm, and the length of the cut beam 4 is about 130 cm. Further, a mounting plate 5a is welded to the tip of the cut beam attachment member 5 and is bolted in contact with the mounting plate 4a provided on the cut beam 4 side.

[0031] Incidentally, the cutting beam 4 can also be directly attached to the flange surfaces of the column members 1, 1 without using the cutting beam attachment member 5 (refer to and see with reference to FIG. 9). Further, although the cutting beam 4 is implemented in a two-stage structure in the vertical direction for easy understanding of FIG. 1, it is not limited thereto, and can be appropriately increased or decreased according to the height of the water channel, the required strength, etc. The sizes of the cutting beam 4 and the cutting beam attachment member 5 can also be appropriately changed in design according to the width of the water channel (wall structure 11), the required strength, etc.

[0032] Therefore, according to the reinforcement method for the existing steel sheet pile 10 according to this Example 1, wall structures 11 each composed of a column member 1, a cross beam member 2, and a wall member 3 are respectively disposed inside the opposing existing steel sheet piles 10, 10. Without connecting to the existing steel sheet piles 10, 10 erected, and the opposing wall structures 11, 11 are connected by a cutting beam 4 and a cutting beam attachment member 5. Connection In addition, a filler is filled between the existing steel sheet pile 10 and the wall structure 11 to present a structure in which both are integrated. Therefore, even at a stage where the existing steel sheet pile has deteriorated so much that it cannot be repaired, it is possible to sufficiently perform the reinforcement work without interrupting the role of the water channel, without using the strength of the existing steel sheet pile 10, and without removing it. Furthermore, the wall structure 11 can sufficiently perform the role expected of the existing steel sheet pile 10. Therefore, it is possible to realize a reinforcement method and a reinforcement structure for an existing steel sheet pile that are extremely excellent in workability, economy, reliability, and quality (reliability).

Example

[0033] FIGS. 5 to 8 show different examples of the reinforcement method for an existing steel sheet pile according to the present invention. The reinforcement method for the existing steel sheet pile 10 according to this Example 2 mainly differs from that of the above Example 1 in that a decorative panel material 9 is further provided inside the wall structure 11. In addition, the same constituent members as those in the above Example 1 are denoted by the same reference numerals, and the description thereof is appropriately omitted.

[0034] The reinforcement method for the existing steel sheet pile 10 according to this Example 2 is as follows: After constructing the wall structure 11 according to the above-described Example 1, a hooked rail 12 is horizontally provided inside the wall structure 11, and a decorative panel material 9 provided with a locking rail 13 (or a locking member) capable of meshing with the hooked rail 12 is attached to the wall structure 11 by hooking its locking rail 13 (or locking member) onto the hooked rail 12. At the same time Before the filling material is filled between the existing steel sheet pile 10, the wall structure 11, and the decorative panel material 9 to integrate the three.

[0035] The hooked rail 12 according to this Example uses a channel steel 12, which is positioned horizontally with respect to the wall structure 11 with its opening facing upward and is attached by welding or the like to the cross beam member 2. At the portion of the column member 1, as shown in FIG. 8, a channel steel 12 formed by bending with a substantially J-shaped (hook-shaped) cross section is used, and it is positioned so that its position and surface match those of the channel steel 12 attached to the cross beam member 2, and is attached by joining means such as bolts 7 and nuts 8. The hooked rail 12 is implemented in a four-stage configuration with a predetermined vertical interval at a portion corresponding to the cross beam member 2. This can be appropriately designed and changed according to the number of stages of the cross beam member 2, the member rigidity of the hooked rail 12 and the locking rail 13, etc.

[0036] On the other hand, the locking rail 13 according to this Example uses a channel steel with a U-shaped cross section, which is positioned horizontally with respect to the decorative panel material 9 and is attached by fixing means such as riveting or screwing. The opening of this locking rail 13 is set downward so as to mesh with the hooked rail 12, and it is implemented by adding at key points. Note that the locking rail 13 is implemented in a four-stage configuration corresponding to the hooked rail 12, but of course, it is appropriately designed and changed according to the arrangement and quantity of the hooked rail 12. Also, instead of the locking rail 13, a configuration in which a plurality of short locking members (locking fittings) having the same cross-sectional shape are installed at predetermined intervals can be implemented in the same manner.

[0037] Next, in this embodiment, as the decorative panel material 9, a metal corrugated lightweight panel 9 called a keystone plate is preferably used. This keystone plate 9 has the advantages of being mass-produced, having a low unit price of the member, being lightweight, and having good workability. As an example, the keystone plate 9 according to this embodiment has a rigidity such that it does not deform against the filling pressure of concrete, has a height of about 1.7 m substantially equivalent to that of the column member 1, a width of 650 mm, an effective width of 630 mm, a wave height of 25 mm, and a plate thickness of 0.8 mm. This keystone plate 9 can form a panel of a required size by a method of partially lapping in the water channel extension direction according to the reinforcement range and connecting by riveting. Incidentally, in this embodiment, by fixing the latching rail 13 to the keystone plate 9, a required number of pre-unified units are prepared to improve the work efficiency.

[0038] In this embodiment, although a commercially available keystone plate 9 is adopted, the commercially available keystone plate 9 has variations in height from 1000 to 4000 mm and can be flexibly adapted as appropriate according to the reinforcement range of the water channel. For example, when the height of the existing steel sheet pile 10 to be reinforced is high, various sizes are appropriately added according to the height, or conversely, when it is low, a keystone panel with a height of 1000 mm is used, or it is adjusted by cutting or the like. Also, in this embodiment, the keystone plate 9 is adopted because it is lightweight, has excellent cross-sectional performance, and has good workability, but a flat lightweight panel can be similarly implemented.

[0039] Thus, in the reinforcement method for the existing steel sheet pile according to this Embodiment 2, after constructing the wall structure 11 according to the above-described Embodiment 1 (refer to the above paragraph

[0026] ), the decorative panel material 9 is attached to the wall structure 11 by hanging the latching rail 13 on the latched rail 12, and Before the operation of filling the filling material is performed. Note that the decorative panel material 9 attaches the cut beam 4 and the cut beam attachment member 5 to the wall structure 11 ConnectionBefore performing the joining operation, the portions corresponding to the cutting beam 4 and the cutting beam mounting member 5 are previously cut out in a rectangular shape (substantially square shape). Further, in this embodiment, in consideration of preventing leakage of the filling material, the structure is designed such that the mounting plate 5a of the cutting beam mounting member 5 is located at the cut-out portion.

[0040] The operation of filling the filling material is to form a closed space in a planar view by installing formwork (not shown) at key points such as both ends of the wall structure 11 and the decorative panel material 9 formed to have a necessary length in the extension direction of the water channel. In the closed space, for example, the filling material is filled from above through a filling hole provided by vertically penetrating the basket concrete block 30. After the closed space is filled with the filling material, curing is performed, thereby constructing a reinforcing structure for the existing steel sheet pile. Note that the wall material (liner plate) 3 of the wall structure 11 is provided with a device for efficiently performing the filling operation of the filling material by forming communication holes through which the filling material passes.

[0041] Therefore, according to the reinforcing method for the existing steel sheet pile 10 according to this Embodiment 2, a wall structure 11 composed of a column member 1, a cross beam member 2, and a wall material 3 is respectively provided inside the opposing existing steel sheet piles 10, 10. Without connecting to the existing steel sheet piles 10, 10 erected, a hooked rail 12 is provided horizontally inside the wall structure 11, and a decorative panel material 9 provided with a hooked rail 13 (or a hooking member) that can be engaged with the hooked rail 12 is attached to the wall structure 11 in a state where the hooked rail 13 (or the hooking member) and the hooked rail 12 are engaged with each other. Also , before a structure in which the filling material is filled between the existing steel sheet pile 10, the wall structure 11, and the decorative panel material 9, and the three are integrated is presented. Therefore, even when the existing steel sheet piles have deteriorated to such an extent that they cannot be repaired, it is possible to perform sufficient reinforcement work without interrupting the role of the water channel, without using the strength of the existing steel sheet piles 10, and without removing them. Furthermore, the wall structure 11 and the decorative panel material 9 can sufficiently fulfill the role expected of the existing steel sheet piles 10. Therefore, it is possible to realize a reinforcement method and a reinforcement structure for existing steel sheet piles that are extremely excellent in workability, economy, reliability, and quality (reliability). <When the wall material is made of lightweight steel sheet piles> [Example 3]

Example

[0042] Figs. 9 to 12 show different examples of the reinforcement method for existing steel sheet piles according to the present invention. The reinforcement method for the existing steel sheet piles 10 according to this Example 3 mainly differs from Example 1 in that the wall material is made of lightweight steel sheet piles 23 instead of the liner plate 3. Note that the same constituent members as in Example 1 are denoted by the same reference numerals and their descriptions are appropriately omitted.

[0043] The reinforcement method for the existing steel sheet piles according to this Example 3 is the same as in Example 1. A wall structure 11 composed of a column member 1, a cross beam member 2, and a wall material (lightweight steel sheet pile) 23 is constructed inside the opposing existing steel sheet piles 10, 10 respectively. Without connecting to the existing steel sheet piles 10, 10 constructed, and the opposing wall structures 11, 11 are The cut by a cross beam 4 Connection while filling a filler (not shown) between the existing steel sheet pile 10 and the wall structure 11 to integrate the two 10, 11.

[0044] The wall structure 11 is constructed by assembling it into a wall shape by joining a cross beam member 2 and a lightweight steel sheet pile 23 with bolts 7 and nuts 8 between the column members 1, 1 erected at a predetermined interval. When forming the wall structure 11 according to this embodiment to have the required length in the extension direction of the water channel, taking the strut members (H-shaped steel) 1, 1 with a height of about 2 m erected at a predetermined interval (about 3 m) as one span, between one span, the cross beam members (H-shaped steel) 2 are arranged in three tiers with substantially equal intervals vertically. The lightweight steel sheet piles 23 are bolted to fill the gaps between the upper and lower cross beam members 3, 3 to form a wall shape. Each of the cross beam members 2 in the three-tier configuration is a single piece with a length of about 3 m, and is installed by joining the flange portions at both ends thereof to the flange portions of the adjacent strut members 1, 1 with bolts 7 and nuts 8. The lightweight steel sheet pile 23 can be appropriately designed and changed according to the height of the existing steel sheet pile 10 to be applied, the structural design such as the required strength, etc. In this embodiment, as an example, it has a cross-sectional shape with a plate thickness of 5 mm, an effective width of 500 mm, and a height of 160 mm, which is called the LSP-5 type, and those with a size of about 1 m in height are adopted, and six pieces are arranged between the upper and lower cross beam members 2, 2. Therefore, the lightweight steel sheet piles 23 are used in a total of 12 pieces, two pieces in the vertical direction and six pieces in the horizontal direction per span of the strut member 1, but it is not limited thereto. For example, as shown in FIGS. 13 and 14, it is of course possible to implement by arranging six lightweight steel sheet piles 23 with a height of about 2 m per span of the strut member 1. As an example, the cut beam 4 has a cross-section of H200×200×8×12 mm and is implemented with a length of about 170 cm so as to match the interval between the opposing strut members 1, 1. Note that the cut beam 4 is implemented with a two-tier structure, but it is not limited thereto, and can be appropriately increased or decreased according to the height of the water channel, the required strength, etc. For reference, to supplement the description of the sizes of the main components, the cross-sectional size of the strut member (H-shaped steel) 1 is H300×300×10×15 mm, and the cross-sectional size of the cross beam member (H-shaped steel) 2 is H250×250×9×14 mm.

[0045] Thus, after performing necessary preparatory work as required, the wall structure 11 according to this embodiment joins the support member 1 and the lowermost cross beam member 2 in a perpendicular direction, places the lightweight steel sheet pile 23 on the cross beam member 2, and joins the flange portion of the cross beam member 2 with bolts 7 and nuts 8 using the left and right valleys (flange portions). Also, adjacent lightweight steel sheet piles 23, 23 are sequentially assembled and connected by hooking joint pieces with each other to construct a wall shape.

[0046] After that, by installing formwork (not shown) at key locations such as both ends of the wall structure 11 formed to the required length in the extension direction of the water channel, a closed space is formed in terms of plane view. In the closed space, for example, a filling material is filled from above through a filling hole provided by vertically penetrating the hat concrete block 30. After filling the closed space with the filling material, curing is performed, thereby constructing a reinforcing structure for the existing steel sheet pile.

[0047] Therefore, according to the reinforcing method for the existing steel sheet pile 10 according to this Example 3, a wall structure 11 composed of a support member 1, a cross beam member 2, and a wall material (lightweight steel sheet pile) 23 is Without connecting to the existing steel sheet piles 10, 10 vertically installed inside the opposing existing steel sheet piles 10, 10, and the opposing wall structures 11, 11 are The cut by the cross beam 4 Connection and a structure is presented in which a filling material is filled between the existing steel sheet pile 10 and the wall structure 11 and the two are integrated. Therefore, even at a stage where the existing steel sheet pile has deteriorated to the extent that it cannot be repaired, it is possible to perform sufficient reinforcement work without interrupting the role of the water channel, without using the strength of the existing steel sheet pile 10, and without removing it. Furthermore, the wall structure 11 can fully perform the role expected of the existing steel sheet pile 10. Therefore, similar to the above Example 1, it is possible to realize a reinforcing method and a reinforcing structure for an existing steel sheet pile that are extremely excellent in workability, economy, reliability, and quality (reliability). [Example 4]

Example

[0048] Figs. 15 to 18 show different embodiments of the method for reinforcing existing steel sheet piles according to the present invention. The method for reinforcing the existing steel sheet pile 10 according to this Embodiment 4 mainly differs from Embodiment 3 in that a decorative panel material 9 is further provided inside the wall structure 11. In addition, the same components as those in Embodiment 3 are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[0049] The method for reinforcing the existing steel sheet pile 10 according to this Embodiment 4 is as follows: After constructing the wall structure 11 according to Embodiment 3 described above, a hooked rail 12 is provided horizontally inside the wall structure 11, and a decorative panel material 9 provided with a hooking rail 13 (or a hooking member) that can mesh with the hooked rail 12 is attached to the wall structure 11 by hooking the hooking rail 13 (or the hooking member) to the hooked rail 12. At the same time, the opposing wall structures 11, 11 are connected by a cross beam 4 Connection and the filling material is filled between the existing steel sheet pile 10, the wall structure 11, and the decorative panel material 9 to integrate the three. Details of the hooked rail 12, the hooking rail 13, and the decorative panel material (keystone plate 9) will be omitted (see paragraphs

[0035] to

[0038] ). Incidentally, Fig. 19 is a variation diagram showing a state in which the decorative panel material 9 is attached to the reinforcing structure of the existing steel sheet pile according to Figs. 13 and 14 described in Embodiment 3.

[0050] Thus, the method for reinforcing the existing steel sheet pile according to this Embodiment 4 is as follows: After constructing the wall structure 11 according to Embodiment 3 described above (see paragraph

[0045] ), the decorative panel material 9 is attached to the wall structure 11 by hooking the hooking rail 13 to the hooked rail 12 , before and the operation of filling the filling material is performed. The decorative panel material 9 cuts out a portion corresponding to the cross beam 4 in advance when performing the joining operation of attaching the cross beam 4 to the wall structure 11. Connection

[0051] ​The operation of filling the filling material is to form a closed space in terms of plane by installing formwork (not shown) at key points such as both ends of the wall structure 11 and the decorative panel material 9 that form the required length in the extension direction of the water channel. In the closed space, for example, the filling material is filled from above through a filling hole provided by vertically penetrating the corrugated concrete block 30. After the closed space is filled with the filling material, curing is carried out, thereby constructing a reinforcement structure for the existing steel sheet pile. Note that the wall material (lightweight steel sheet pile) 23 of the wall structure 11 is provided with a device for efficiently performing the filling operation of the filling material by forming communication holes through which the filling material passes. In addition, appropriate measures are taken at the cut-out part of the decorative panel material 9 to prevent the filling material from leaking.

[0052] Therefore, according to the reinforcement method for the existing steel sheet pile 10 according to this Example 4, a wall structure 11 composed of a strut material 1, a cross beam material 2, and a wall material (lightweight steel sheet pile) 23 is respectively provided inside the opposing existing steel sheet piles 10, 10. Without connecting to the existing steel sheet piles 10, 10 erected, a hooked rail 12 is provided horizontally inside the wall structure 11, and a decorative panel material 9 provided with a hooked rail 13 (or a hooking member) that can be engaged with the hooked rail 12 is attached to the wall structure 11 in a state where the hooked rail 13 (or the hooking member) and the hooked rail 12 are engaged. Also , before a structure in which a filling material is filled between the existing steel sheet pile 10, the wall structure 11, and the decorative panel material 9, and the three are integrated is presented. Therefore, even at a stage where the existing steel sheet pile has deteriorated so much that it cannot be repaired, the reinforcement work can be sufficiently carried out without interrupting the role of the water channel, without using the strength of the existing steel sheet pile 10, and without removing it. Furthermore, the wall structure 11 and the decorative panel material 9 can sufficiently perform the role expected of the existing steel sheet pile 10. Therefore, it is possible to realize a reinforcement method and a reinforcement structure for the existing steel sheet pile that are extremely excellent in workability, economy, reliability, and quality (reliability). <When the wall material is implemented with a corrugated steel plate> [Example 5]

Example

[0053] Figures 20 to 23 show different embodiments of the method for reinforcing existing steel sheet piles according to the present invention. The method for reinforcing the existing steel sheet pile 10 according to this Embodiment 5 mainly differs from Embodiment 1 in that the wall material is implemented using a corrugated steel plate 33 instead of the liner plate 3. In addition, the same constituent members as those in Embodiment 1 are denoted by the same reference numerals, and their descriptions are appropriately omitted.

[0054] Similar to Embodiment 1, the method for reinforcing the existing steel sheet pile according to this Embodiment 5 constructs a wall structure 11 composed of a strut member 1, a cross beam member 2, and a wall material (corrugated steel plate) 33 inside the opposing existing steel sheet piles 10, 10 respectively. Without connecting to the existing steel sheet piles 10, 10 constructs, and cuts the opposing wall structures 11, 11 The with a cross-cut beam 4 Connection and fills a filler material (not shown) between the existing steel sheet pile 10 and the wall structure 11 to integrate the two 10, 11.

[0055] The wall structure 11 is constructed by assembling it into a wall shape by joining a cross beam member 2 and a corrugated steel plate 33 with bolts 7 and nuts 8 between the vertically erected strut members 1, 1 with a predetermined interval therebetween. In forming the wall structure 11 according to this embodiment to have a required length in the extension direction of the water channel, when taking the strut members (H-shaped steel) 1, 1 with a height of about 2 m erected at a predetermined interval (about 4 m) as one span, between one span, the cross beam members (H-shaped steel) 2 are arranged in a three-stage configuration with substantially equal intervals vertically, and the corrugated steel plate 33 is bolted to fill the gaps between the upper and lower cross beam members 3, 3 to form a wall shape. Each of the three-stage configured cross beam members 2 is a single piece with a length of about 4 m per stage, and is installed by joining the flange portions at both ends thereof to the flange portions of the adjacent strut members 1, 1 with bolts 7 and nuts 8. The corrugated steel plate 33 can be appropriately redesigned according to the height of the existing steel sheet pile 10 to be applied, the structural design such as the required strength, etc. However, a steel plate with a thickness of about 5 mm is corrugated and formed to have a height of about 1 m and a width of about 1.3 m. Therefore, although six corrugated steel plates 33, two in the vertical direction and three in the horizontal direction per span of the support member 1, are used, it is not limited to this. As an example, the crossbeam 4 has a cross-section of H200×200×8×12 mm and is implemented with a length of about 170 cm so as to match the distance between the opposing support members 1, 1. Note that the crossbeam 4 is implemented with an upper and lower two-stage structure, but it is not limited to this, and can be appropriately increased or decreased according to the height of the water channel, the required strength, etc. For reference, to supplement the description of the sizes of the main components, the cross-sectional size of the support member (H-shaped steel) 1 is H300×300×10×15 mm, and the cross-sectional size of the crossbeam member (H-shaped steel) 2 is H250×250×9×14 mm.

[0056] The configuration of the wall structure 11 is of course not limited to the above. For example, FIGS. 24 and 25 show an embodiment in which the crossbeam member 2 is implemented with an upper and lower two-stage structure. The corrugated steel plates 33, 33 adjacent in the vertical direction are directly overlapped (lapped) and bolted together without passing through the crossbeam member 2. Also, FIGS. 26 and 27 also show an embodiment in which the crossbeam member 2 is implemented with an upper and lower two-stage structure. In this case, the corrugated steel plate 33 has a high size of about 2 m in height, and three corrugated steel plates 33 in the horizontal direction per span of the support member 1 are used to form a wall.

[0057] Thus, after performing the necessary preparatory work as required, the wall structure 11 according to this embodiment joins the support member 1 and the lowermost crossbeam member 2 in a right-angled direction, places the corrugated steel plate 33 on the crossbeam member 2, and joins it with the flange portion of the crossbeam member 2 by bolts 7 and nuts 8. At the same time, the adjacent corrugated steel plates 33 are overlapped at their ends and bolted together, and are sequentially assembled to construct a wall shape.

[0058] After that, by installing formwork (not shown) at key points such as both ends of the wall structure 11 formed to the required length in the extending direction of the water channel, a closed space is formed in terms of plane view. In the closed space, for example, a filler is filled from above through a filling hole provided by vertically penetrating the corrugated concrete block 30. After the closed space is filled with the filler, curing is carried out, thereby constructing a reinforcing structure for the existing steel sheet pile.

[0059] Therefore, according to the reinforcing method for the existing steel sheet pile 10 according to this Example 5, inside the opposing existing steel sheet piles 10, 10, there is a wall structure 11 composed of a column member 1, a cross beam member 2, and a wall member (corrugated steel plate) 33 Without connecting to the existing steel sheet piles 10, 10 erected, and the opposing wall structures 11, 11 are The cut by a cross beam 4 Connection and a structure is presented in which a filler is filled between the existing steel sheet pile 10 and the wall structure 11 and the two are integrated. Therefore, even at a stage where the existing steel sheet pile has deteriorated so much that it cannot be repaired, it is possible to carry out sufficient reinforcement work without interrupting the role of the water channel, without using the strength of the existing steel sheet pile 10, and without removing it. Furthermore, the wall structure 11 can sufficiently fulfill the role expected of the existing steel sheet pile 10. Therefore, similar to the above Example 1, it is possible to realize a reinforcing method and a reinforcing structure for an existing steel sheet pile that are extremely excellent in workability, economy, as well as certainty and quality (reliability). [Example 6]

Example

[0060] Figs. 28 to 31 show different examples of the reinforcing method for an existing steel sheet pile according to the present invention. The reinforcing method for the existing steel sheet pile 10 according to this Example 6 mainly differs from the above Example 5 in that a decorative panel material 9 is further provided inside the wall structure 11. In addition, the same constituent members as those in the above Example 5 are denoted by the same reference numerals and their descriptions are appropriately omitted.

[0061] The reinforcing method for the existing steel sheet pile 10 according to this Example 6 is as follows: After constructing the wall structure 11 according to the above-described Example 5, a latching rail 12 is provided horizontally inside the wall structure 11, and a decorative panel material 9 provided with a latching rail 13 (or a latching member) capable of meshing with the latching rail 12 is attached to the wall structure 11 by latching the latching rail 13 (or the latching member) to the latching rail 12. At the same time , before the filling material is filled between the existing steel sheet pile 10, the wall structure 11, and the decorative panel material 9 to integrate the three. Details of the latching rail 12, the latching rail 13, and the decorative panel material (keystone plate 9) will be omitted (see the above paragraphs

[0035] to

[0038] ). Incidentally, Fig. 32 is a variation diagram showing a state in which the decorative panel material 9 is attached to the reinforcing structure of the existing steel sheet pile according to Figs. 24 and 25 described in Example 5, and Fig. 33 is a variation diagram showing a state in which the decorative panel material 9 is attached to the reinforcing structure of the existing steel sheet pile according to Figs. 26 and 27.

[0062] Thus, the reinforcing method for the existing steel sheet pile according to this Example 6 is as follows: After constructing the wall structure 11 according to the above-described Example 5 (see the above paragraph

[0057] ), the decorative panel material 9 is attached to the wall structure 11 by latching the latching rail 13 to the latching rail 12. At the same time Before the operation of filling the filling material is performed. Note that, when performing the joining operation of causing the cross beam 4 to be attached to the wall structure 11, the portion corresponding to the cross beam 4 is cut out in advance on the decorative panel material 9. Connection When performing the joining operation of causing the cross beam 4 to be attached to the wall structure 11, the portion corresponding to the cross beam 4 is cut out in advance on the decorative panel material 9.

[0063] The operation of filling the filling material is to form a closed space in a planar view by installing formwork (not shown) at key points such as both ends of the wall structure 11 and the decorative panel material 9 formed to have a required length in the extension direction of the water channel. The filling material is filled from above through a filling hole provided by vertically penetrating, for example, a hat-shaped concrete block 30 into the closed space. After the closed space is filled with the filling material, curing is performed, thereby constructing a reinforcing structure for the existing steel sheet pile. Note that the wall material (corrugated steel sheet) 33 of the wall structure 11 is devised to efficiently perform the filling work of the filling material by forming communication holes through which the filling material passes. Further, appropriate measures are taken at the cut-out portion of the decorative panel material 9 so that the filling material does not leak.

[0064] Therefore, according to the reinforcement method of the existing steel sheet pile 10 according to this Example 6, a wall structure 11 composed of a column material 1, a cross beam material 2, and a wall material (corrugated steel sheet) 33 is respectively provided inside the opposing existing steel sheet piles 10, 10. Without connecting to the existing steel sheet piles 10, 10 erected, a hooked rail 12 is provided horizontally inside the wall structure 11, and a decorative panel material 9 provided with a hooked rail 13 (or a hooking member) capable of meshing with the hooked rail 12 is attached to the wall structure 11 in a state where the hooked rail 13 (or the hooking member) and the hooked rail 12 are meshed. , before A structure is presented in which a filling material is filled between the existing steel sheet pile 10, the wall structure 11, and the decorative panel material 9, and the three are integrated. Therefore, even at a stage where the existing steel sheet pile has deteriorated so much that it cannot be repaired, it is possible to sufficiently perform the reinforcement work without interrupting the role of the water channel, without using the strength of the existing steel sheet pile 10, and without removing it. Furthermore, the wall structure 11 and the decorative panel material 9 can sufficiently fulfill the role expected of the existing steel sheet pile 10. Therefore, it is possible to realize a reinforcement method and a reinforcement structure for an existing steel sheet pile that are extremely excellent in workability, economy, reliability, and quality (reliability).

[0065] As described above, the embodiments have been described based on the drawings. However, the present invention is not limited to the illustrated examples, and it is mentioned for the sake of caution that it includes the scope of design changes and application variations that those skilled in the art usually make without departing from the technical idea. In the above Examples 1 to 6, when constructing the wall structure 11, any of the wall materials such as the liner plate 3, the lightweight steel sheet pile 23, and the corrugated steel sheet 33 are joined to the web or flange of the cross beam member 2 with bolts 7 and nuts 8, but it is not necessarily required to join them. Since the gap between the existing steel sheet pile 10 and the wall materials 3, 23, and 33 will be filled with a filler later, the wall materials 3, 23, and 33 only need to have such strength and rigidity that they will not slip due to the filling pressure of the filler. Specifically, in Examples 1 and 2, the liner plate 3 is attached to the central part of the web of the cross beam member 2, but it may be made to abut against the flange on the water channel side of the cross beam member 2 (refer to the reference by citing the reference numerals 23, etc. in Fig. 9). Similarly, for the lightweight steel sheet pile 23 according to Examples 3 and 4 and the corrugated steel sheet 33 according to Examples 5 and 6, they may be made to abut against the flange on the water channel side of the cross beam member 2 without being joined with bolts 7 and nuts 8. Devices such as sandwiching a spacer in the gap between the flange on the existing steel sheet pile 10 side of the cross beam member 2 so that the wall materials 3, 23, and 33 do not slip are appropriately carried out. The spacer may be anything as long as it fills the gap, and for example, it may be something like a leaf spring.

Explanation of Reference Numerals

[0066] 1 Column member 2 Cross beam member 3 Wall material (liner plate) 3a Vertical flange 3b Horizontal flange 3’ Half-size liner plate 4 Cut beam 4a Mounting plate 5 Cut beam mounting member 5a Mounting plate 6 Joint plate 7 Bolt 8 Nut 9 Decorative panel material (keystone plate) 10 Existing steel sheet pile 11 Wall structure 12 Hook rail 13 Hanging rail 20 Groove bottom 23 Wall material (lightweight steel sheet pile) 30 Straw hat concrete block 33 Wall material (corrugated steel sheet)

Claims

1. A wall structure composed of a column member, a cross beam member, and a wall member is constructed inside the opposing existing steel sheet piles without connecting it to the existing steel sheet piles. The opposing wall structures are connected by a cross beam provided between the wall structures, and a filler is filled between the existing steel sheet piles and the wall structure to integrate the two. A reinforcement method for existing steel sheet piles, characterized in that.

2. After constructing the wall structure, a hooked rail is provided inside the wall structure in the waterway extension direction, and a decorative panel material provided with a hooked rail or a hooking member that can mesh with each other is attached to the wall structure by hooking the hooked rail or the hooking member to the hooked rail. At the same time, a filler is filled between the existing steel sheet piles, the wall structure, and the decorative panel material to integrate the three. The reinforcement method for existing steel sheet piles according to claim 1, characterized in that.

3. The reinforcement method for existing steel sheet piles according to claim 2, characterized in that a communication hole through which the filler passes is formed in the wall material of the wall structure.

4. The reinforcement method for existing steel sheet piles according to any one of claims 1 to 3, characterized in that the wall material is a liner plate, a steel sheet pile, or a corrugated steel plate.

5. A wall structure composed of a column member, a cross beam member, and a wall member is erected inside the opposing existing steel sheet piles without connecting it to the existing steel sheet piles. The opposing wall structures are connected by a cross beam provided between the wall structures, and a filler is filled between the existing steel sheet piles and the wall structure to integrate the two. A reinforcement structure for existing steel sheet piles, characterized in that.

6. A hooked rail is provided inside the wall structure in the waterway extension direction, and a decorative panel material provided with a hooked rail or a hooking member that can mesh with each other is attached to the wall structure in a state where the hooked rail or the hooking member meshes with the hooked rail. The reinforcement structure for existing steel sheet piles according to claim 5, characterized in that a filler is also filled between the decorative panel material and the wall structure to integrate the two.

7. The reinforcement structure for existing steel sheet piles according to claim 6, characterized in that a communication hole through which the filler passes is formed in the wall material of the wall structure.

8. The reinforcing structure for an existing corrugated steel sheet according to any one of claims 5 to 7, wherein the wall material is a liner plate, a corrugated steel sheet, or a corrugated steel plate.

Images