Connecting member, steel sheet pile wall, and method of manufacturing connecting member

Abstract

To provide a connection member that is gripped by a construction machine and is driven in the ground, which reduces press-in resistance while enabling stable gripping by the construction machine, and facilitates handling such as storage.SOLUTION: A connection member of a steel sheet pile includes: a plate-like gripping part having such a length as to be capable of being gripped by a construction machine in a cross-sectional shape; and first and second joint parts which are formed on the end of the gripping part, and can be fit to the joint of the steel sheet pile.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a connecting member, a steel sheet pile wall, and a method for manufacturing a connecting member. [Background technology]

[0002] Steel sheet pile walls may be bent in plan due to interference with existing structures or the shape of the excavation site. When bending beyond the joint fit tolerance of steel sheet piles is required, such as at corners, corner steel sheet piles with special joints are used. Furthermore, when branching is required in a steel sheet pile wall, deformed steel sheet piles, which are shaped like a single steel sheet pile combined with a portion of another steel sheet pile, are used. Corner steel sheet piles and deformed steel sheet piles are processed in factories and must be managed separately from other sheet piles on site, complicating the process. Corner steel sheet piles must be classified according to the shape of the bend. Furthermore, deformed steel sheet piles are difficult to transport because they require additional spacing materials to prevent instability when stacked. In consideration of these issues, connecting members for steel sheet piles have been proposed, such as those described in Patent Documents 1, 2, and 3. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Utility Model Registration No. 3188043 [Patent Document 2] Utility Model Registration No. 3188044 [Patent Document 3] Japanese Patent Application Laid-Open No. 2013-163904 Summary of the Invention [Problem to be solved by the invention]

[0004] For example, the above-mentioned Patent Document 1 describes forming a central pressure-bearing section with a substantially rectangular cross-section between connecting parts that fit into the joints of steel sheet piles, and gripping both sides of this central pressure-bearing section as support surfaces with heavy machinery. However, when driving connecting members into the ground using heavy machinery, the thick, rectangular cross-section of the central pressure-bearing section creates high press-in resistance, and the entire connecting member, including the connecting parts, has a cross-sectional shape with many convex parts, which requires the use of multiple spacing members when stacking and storing them, which is time-consuming. Note that the connecting members described in Patent Documents 2 and 3 are fitted into the joints of the steel sheet piles before the steel sheet piles are driven into the ground, and therefore do not have any parts that can be gripped with heavy machinery.

[0005] Therefore, the present invention aims to provide a connecting member that is gripped by a construction machine and driven into the ground, which allows the construction machine to grip it stably while reducing pressure-in resistance and making it easier to handle during storage, a steel sheet pile wall using the connecting member, and a method for manufacturing the connecting member. [Means for solving the problem]

[0006] [1] A connecting member for steel sheet piles, which has, in its cross-sectional shape, a flat gripping portion having a length that allows it to be gripped by a construction machine, and first and second joint portions formed at the ends of the gripping portion, each of which can be fitted into a joint of the steel sheet pile. [2] The connecting member according to [1], wherein the first and second joint portions are formed only at one end of the grip portion. [3] The connecting member described in [2], further comprising a third joint portion formed at one end of the holding portion, which is the same as the first and second joint portions, and which can be fitted into the joint of the steel sheet pile. [4] The connecting member described in [3], further comprising a fourth joint portion formed at one end of the holding portion, which is the same as the first, second and third joint portions, and which can be fitted into the joint of the steel sheet pile. [5] The connecting member according to [1], wherein the first joint portion is formed at one end of the grip portion, and the second joint portion is formed at the other end of the grip portion. [6] The connecting member according to [5], wherein the first and second joint portions each include a plurality of joint portions. [7] The connecting member according to [1], wherein the first and second joint portions are each capable of being fitted into joints of different types of steel sheet piles. [8] A connecting member according to [1], having a cross-sectional aspect ratio of 3.0 or more. [9] The connecting member according to [1], wherein the length of the gripping portion in cross section is 100 mm or more.

[10] A steel sheet pile wall comprising: a connecting member according to any one of [1] to [9]; a first steel sheet pile including a joint portion that can be fitted into the first joint portion; and a second steel sheet pile including a joint portion that can be fitted into the second joint portion.

[11] The steel sheet pile wall according to

[10] , wherein the first and second steel sheet piles are different types of steel sheet piles.

[12] The steel sheet pile wall according to

[10] , wherein the extension direction of the portion including the first steel sheet pile is different from the extension direction of the portion including the second steel sheet pile.

[13] The steel sheet pile wall described in

[10] , wherein the connecting member further includes a third joint portion formed at the end of the holding portion, and the steel sheet pile wall further includes a third steel sheet pile including a joint portion that is fitted into the third joint portion.

[14] A steel sheet pile wall as described in

[10] , wherein the tolerance in the fitting angle when fitting the joint portion of the first steel sheet pile with the first joint portion is greater than the tolerance in the fitting angle when fitting the joint portions of steel sheet piles of the same type as the first steel sheet pile.

[15] The steel sheet pile wall according to

[10] , wherein the minimum plate thickness at the first joint portion of the connecting member is greater than the minimum plate thickness at the joint portion of the first steel sheet pile.

[16] A method for manufacturing a connecting member according to any one of [1] to [9], wherein the entire connecting member including the gripping portion and the first and second joint portions is integrally formed by hot rolling, cold rolling or hot extrusion. [Effects of the Invention]

[0007] According to the above-described configuration, the flat gripping portion allows the connecting member to be stably gripped by the construction machine, and the pressing resistance of the gripping portion during pouring can be reduced. Furthermore, since the joint portion protrudes from at least one side of the gripping portion in the plate thickness direction, the connecting members can be stably stacked and stored by, for example, arranging the gripping portion and the joint portion alternately, making them easy to handle. [Brief explanation of the drawings]

[0008] [Figure 1] 1A and 1B are diagrams illustrating a first example of a connecting member of a steel sheet pile according to an embodiment of the present invention. [Figure 2] FIG. 10 is a diagram showing a second example of a connecting member of a steel sheet pile according to an embodiment of the present invention. [Figure 3] FIG. 10 is a diagram showing a third example of a connecting member of a steel sheet pile according to an embodiment of the present invention. [Figure 4] FIG. 10 is a diagram showing a fourth example of a connecting member of a steel sheet pile according to an embodiment of the present invention. [Figure 5] FIG. 10 is a diagram showing a fifth example of a connecting member of a steel sheet pile according to an embodiment of the present invention. [Figure 6] FIG. 10 is a diagram showing a sixth example of a connecting member of a steel sheet pile according to an embodiment of the present invention. [Figure 7] FIG. 10 is a diagram showing a seventh example of a connecting member of a steel sheet pile according to an embodiment of the present invention. [Figure 8] FIG. 10 is a diagram showing an eighth example of a connecting member of a steel sheet pile according to an embodiment of the present invention. [Figure 9] 10A and 10B are diagrams for explaining examples of dimensions of connecting members of the steel sheet pile according to the embodiment of the present invention. [Figure 10] FIG. 1 is a diagram showing a first example of a steel sheet pile wall according to an embodiment of the present invention. [Figure 11] FIG. 4 is a diagram showing a second example of a steel sheet pile wall according to an embodiment of the present invention. [Figure 12] FIG. 10 is a diagram showing a third example of a steel sheet pile wall according to an embodiment of the present invention. [Figure 13] FIG. 10 is a diagram showing a fourth example of a steel sheet pile wall according to an embodiment of the present invention. [Figure 14] FIG. 10 is a diagram showing a fifth example of a steel sheet pile wall according to an embodiment of the present invention. [Figure 15] FIG. 10 is a diagram showing a sixth example of a steel sheet pile wall according to an embodiment of the present invention. [Figure 16] FIG. 10 is a diagram showing a seventh example of a steel sheet pile wall according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and drawings, components having substantially the same functional configurations are designated by the same reference numerals, and redundant description will be omitted.

[0010] FIG. 1 is a diagram showing a first example of a connecting member for a steel sheet pile according to an embodiment of the present invention. In the illustrated example, the connecting member 10A is a long member as shown in FIG. 1(a) and includes a flat-shaped gripping portion 11 in cross section and a joint portion 12A formed at the end of the gripping portion 11. The gripping portion 11 has a length that allows it to be gripped by a chuck portion 51 of a construction machine as shown in FIG. 1(b). The construction machine is, for example, a vibrohammer or a press-fitting machine. Here, the length of the gripping portion 11 refers to the length in the cross section as shown in FIG. 1(b). The fact that the gripping portion 11 is flat means that the dimension of the gripping portion 11 in the thickness direction is smaller than the dimension of the joint portion 12A in the same direction. The joint portion 12A includes four joint portions 121A, 122A, 123A, and 124A (first, second, third, and fourth joint portions) that can be fitted to joints of the steel sheet pile. In the illustrated example, the joint portions 121A to 124A are all formed at one end of the gripping portion 11, and no joint portion is formed at the other end of the gripping portion 11.

[0011] Such connecting members 10A can be stably stacked and stored by arranging the gripping portions 11 and the joint portions 12A alternately, as shown in FIG. 1(c). In this case, the connecting member 10A at the bottom may be positioned so that the gripping portion 11 is horizontal, for example, by using a spacer of the same height as the joint portions 12A protruding from the gripping portion 11. Alternatively, the connecting members may be stacked diagonally to match the inclination of the connecting member 10A at the bottom. In either case, gaps are formed between the gripping portions 11 of the stacked connecting members and between the gripping portion 11 of the connecting member at the bottom and the ground or floor. Therefore, for example, if the chuck portion 51 of a construction machine is thin, the gripping portions 11 of the connecting members 10A stored in a stack can be directly gripped.

[0012] 2 to 5 are diagrams showing second to fifth examples of connecting members for steel sheet piles according to an embodiment of the present invention. In all of these examples, the joint portion is formed only at one end of the gripping portion 11, as in the example shown in FIG. 1. In each figure, (a) shows the entire long connecting member, (b) shows a cross-section of the connecting member gripped by the chuck portion 51 of a construction machine, and (c) shows a state in which multiple connecting members are stacked. FIG. 2 shows an example of a connecting member 10B in which the joint portion 12B includes two joint portions 121B and 122B (first and second joint portions). In the example shown in FIG. 2, the joint portion 121B includes, in addition to a hook-shaped portion, a retaining portion that prevents the joint of the steel sheet pile engaged with the hook-shaped portion from coming loose. By forming a retaining portion in the joint portion 121B in this way, the tolerance for the fitting angle when the joint portion of a steel sheet pile is fitted into the joint portion 121B can be made larger than, for example, the tolerance for the fitting angle when the joint portions of steel sheet piles are fitted together. Figure 3 also shows an example of a connecting member 10C in which the joint portion 12C includes two joint portions 121C, 122C (first and second joint portions). The connecting members 10B, 10C in the examples of Figures 2 and 3 are used depending on, for example, the type of steel sheet pile to be fitted into each joint portion and whether the connecting member is located at a bent portion of the steel sheet pile wall.

[0013] Fig. 4 shows an example of a connecting member 10D in which a joint 12D includes three joints 121D, 122D, and 123D (first, second, and third joints), and Fig. 5 shows an example of a connecting member 10E in which a joint 12E includes four joints 121E, 122E, 123E, and 124E (first, second, third, and fourth joints), which differ from the example in Fig. 1. In the examples in Figs. 4 and 5, a substantially circular bulge is formed at the tip of each joint. Such a bulge can also increase the tolerance in the fitting angle when fitting the joints of steel sheet piles into the joints 121D-123D or the joints 121E-124E compared to, for example, the tolerance in the fitting angle when fitting the joints of steel sheet piles together. A connecting member including three or more joint portions, as in the examples of Figure 1 and Figures 4 and 5, may be used at the branch portion of a steel sheet pile wall, for example, as in the examples described below, or the joint portions for fitting the joints of the steel sheet pile may be selected according to the type of steel sheet pile and the angle of curvature of the steel sheet pile wall.

[0014] Although the gripping portion 11 of the connecting member described with reference to Figures 1 to 5 above is not a part used to connect steel sheet piles, the flat gripping portion 11 allows the connecting member to be stably gripped by a construction machine, eliminating the need for a process of fitting and welding the connecting member to the steel sheet pile in advance. The connecting member can be installed while adjusting the angle, etc., to match the installation position of the immediately preceding steel sheet pile. Furthermore, the dimension of the gripping portion 11 in the thickness direction is smaller than the dimension of the joint portion, thereby reducing the press-in resistance of the gripping portion 11 during installation. Because the joint portion protrudes from at least one side of the gripping portion 11 in the thickness direction, the connecting members can be stably stacked and stored by, for example, arranging the gripping portions 11 and the joint portion alternately, making them easy to handle.

[0015] 6 to 8 show sixth to eighth examples of connecting members for steel sheet piles according to an embodiment of the present invention. Unlike the examples shown in FIGS. 1 to 5, these examples have joints formed at both ends of the gripping portion 11. In each figure, (a) shows the entire elongated connecting member, (b) shows a cross-section of the connecting member gripped by the chuck 51 of a construction machine, and (c) shows a stack of multiple connecting members, similar to the examples shown in FIGS. 1 to 5. FIG. 6 shows an example of a connecting member 10F in which a first joint 12F1 is formed at one end of the gripping portion 11 and a second joint 12F2 is formed at the other end of the gripping portion 11. The first joint 12F1 and the second joint 12F2 each consist of a single joint including a holding portion. Such connecting members 10F can also be stably stacked and stored by inverting the stacked connecting members as shown in Fig. 6(c) and aligning the joint portions 12F1, 12F2 with the grip portion 11. If the joint portions 12F1, 12F2 protrude from the grip portion 11 to approximately the same height, the grip portion 11 of the bottom connecting member can be positioned horizontally without using a spacer.

[0016] FIG. 7 shows an example of a connecting member 10G in which a first joint portion 12G1 is formed at one end of the gripping portion 11 and a second joint portion 12G2 is formed at the other end of the gripping portion 11. The first joint portion 12G1 includes two joint portions 121G and 122G, and the second joint portion 12G2 also includes two joint portions 123G and 124G. As shown in FIG. 7(c), the connecting member 10G can be stacked without being inverted because the joint portions 12G1 and 12G2 protrude on both sides in the thickness direction of the gripping portion 11. FIG. 8 shows an example of a connecting member 10H in which a first joint portion 12H1 is formed at one end of the gripping portion 11 and a second joint portion 12H2 is formed at the other end of the gripping portion 11. In the connecting member 10H, the first joint portion 12H1 includes two joint portions 121H and 122H, and the second joint portion 12H2 includes two joint portions 123H and 124H. The joint portions 121H and 122H include a common holding portion. A connecting member having three or more joint portions on both sides of the gripping portion 11 as in the examples of Figures 7 and 8 may be used at the branch portion of a steel sheet pile wall, for example, as in the example described later, and joint portions for fitting the joints of the steel sheet pile may be selected according to the type of steel sheet pile and the angle of bending of the steel sheet pile wall.

[0017] The connecting member described above with reference to Figures 6 to 8 can also be stably held by a construction machine using the flat gripping portion 11, reducing the pressing resistance of the gripping portion 11 during casting. Furthermore, for example, by arranging the gripping portions 11 and the joint portions alternately, the connecting members can be stably stacked for storage, making them easy to handle. By forming joint portions on both sides of the gripping portion 11, for example, many different types of joints can be formed to accommodate various types of steel sheet piles and connection angles. Furthermore, the shape of the wall can be adjusted by changing the length of the gripping portion.

[0018] The length of the connecting member according to this embodiment, i.e., the dimension in the depth direction during driving, as described above, may be the same as or different from the steel sheet piles to be connected. Specifically, when the steel sheet pile wall is an earth-retaining wall, connecting members are not necessarily required at the embedded portion, so the connecting member may be shorter than the steel sheet pile, for example, about 1.2 times the length of the steel sheet pile excluding the embedded portion. Furthermore, if the required length cannot be secured due to limitations on transportation means or storage space, the connecting member may be longitudinally spliced. For the longitudinal splice joint, for example, butt welding, fillet welding using a splice plate, or bolt joints can be used.

[0019] The connecting member according to the present embodiment as described above may be manufactured by integrally molding the entire structure, including the gripping portion and the joint portion, by hot rolling, cold rolling, or hot extrusion. By integrally molding using the above-described manufacturing method, even complex curved surfaces, such as recesses or curved surfaces, can be easily manufactured. The connecting member may also be manufactured using a 3D printer. If connecting members can be manufactured in real time outside of a factory using a 3D printer, for example, connecting members can be manufactured by setting appropriate shapes and rotational tolerances to suit the condition of the steel sheet piles on-site.

[0020] FIG. 9 is a diagram for explaining an example of the dimensions of a connecting member of a steel sheet pile according to an embodiment of the present invention. Using the connecting member described above with reference to FIG. 1 as an example, FIG. 9 shows the cross-sectional aspect ratio a / b, the length L of the gripping portion, the plate thickness t1 of the gripping portion, and the minimum plate thickness t2 at the joint. The cross-sectional aspect ratio a / b is expressed by a representing the dimension in a first direction in which the flat-shaped gripping portion extends in the cross section of the connecting member, and b representing the dimension in a second direction perpendicular to the first direction. The longer the flat portion is and the smaller the protrusion of the joint, the larger the aspect ratio a / b. Conversely, the shorter the flat portion is and the larger the protrusion of the joint, the smaller the aspect ratio a / b.

[0021] The aspect ratio of the cross section of the connecting member in the embodiment of the present invention is not necessarily limited. However, from the viewpoint of suppressing torsional deformation that occurs when the connecting member is driven into the ground, the aspect ratio a / b is preferably 3.0 or more, more preferably 4.0 or more, and even more preferably 5.0 or more. By suppressing torsional deformation of the connecting member, the interference when fitting the joint portion of the connecting member to be driven into the ground with the joint portion of the steel sheet pile that has been driven previously can be reduced, allowing the connecting member to be driven smoothly. Furthermore, suppressing torsional deformation of the driven connecting member also allows the next steel sheet pile to be connected to be driven smoothly.

[0022] Furthermore, the length L of the gripping portion of the connecting member in the embodiment of the present invention is not necessarily limited as long as it is a length that can be gripped by a construction machine. However, the length L of the gripping portion is preferably 100 mm or more so that it can be gripped by a general construction machine. By ensuring a sufficient length L of the gripping portion, the load can be more reliably transmitted from the construction machine during pouring and removal, enabling stable construction without the connecting member falling off. If the width of the chuck portion of the construction machine is known, stable gripping can be achieved by making the length L of the gripping portion approximately 50 mm longer than the width of the chuck portion of the construction machine. The plate thickness t1 of the gripping portion is not particularly limited as long as it is smaller than the dimension of the joint portion in the plate thickness direction of the gripping portion, as described above. However, from the viewpoint of stably transmitting the load from the construction machine while reducing press-fit resistance, it is preferably 9 mm to 20 mm, more preferably 10 mm or more. The minimum plate thickness t2 at the joint portion is also not particularly limited, but it is preferably larger than the minimum plate thickness at the joint portion of the steel sheet pile to be fitted. This allows the joint portion of the connecting member to exhibit a higher strength than the joint portion of the steel sheet pile, and makes it possible to prevent the connecting member from being separated from the steel sheet pile due to deformation.

[0023] Below, examples of steel sheet pile walls using the above-described connecting members are described. Although each example is described as using a specific type of connecting member, it is also possible to configure a similar steel sheet pile wall using other types of connecting members, and the following description does not limit the relationship between the type of connecting member and the shape of the steel sheet pile wall.

[0024] FIG. 10 is a diagram illustrating a first example of a steel sheet pile wall according to an embodiment of the present invention. In the illustrated example, a steel sheet pile wall 100A including steel sheet piles 101 and 102 is constructed using a connecting member 10A. The steel sheet pile 101 is a U-shaped steel sheet pile, and the steel sheet pile 102 is a hat-shaped steel sheet pile. Even if the first and second steel sheet piles connected by the connecting member 10A are different types of steel sheet piles and therefore have different joint shapes, a steel sheet pile wall can be constructed by appropriately designing the shape and angle of the joint of the connecting member 10A so that the joint of the connecting member 10A fits into the joint of the steel sheet piles 101 and 102. The type of steel sheet piles connected by the connecting member is not limited to hat-shaped or U-shaped, and may be Z-shaped or straight steel sheet piles, etc.

[0025] FIG. 11 is a diagram illustrating a second example of a steel sheet pile wall according to an embodiment of the present invention. In the illustrated example, a steel sheet pile wall 100B including steel sheet piles 103, 104, 105, and 106 is constructed using connecting members 10B. The extension direction D1 of the portion of the steel sheet pile wall 100B including the steel sheet pile 103, the extension direction D2 of the portion including the steel sheet piles 104 and 105, and the extension direction D3 of the portion including the steel sheet pile 106 are different. That is, the connecting members 10B are arranged at the bends of the steel sheet pile wall 100B. Because the steel sheet piles are connected to each other at the bends via the connecting members 10B, corner steel sheet piles are not required, and the steel sheet piles 103 to 106 can be the same type of steel sheet pile. Although the steel sheet piles 103 to 106 are all hat-shaped steel sheet piles, a similar configuration is possible with other types of steel sheet piles, such as U-shaped steel sheet piles. By using a connecting member such as connecting member 10B, which has a large tolerance for the fitting angle when fitted with the joint portion of the steel sheet pile, for example by forming a retaining portion at the joint portion, it is possible to provide a wider range of angles for the bent portion that can be accommodated.

[0026] 11, the arm portion of the steel sheet pile 104 and the gripping portion of the connecting member 10B are in close contact with each other in plan view, and if the steel sheet pile 104 is driven first, it is difficult to grasp the gripping portion of the connecting member 10B and drive the steel sheet pile 104 so that their top ends are aligned. In such a case, for example, the steel sheet piles 103 and 104 are driven in order, starting from the steel sheet pile 103, and the connecting member 10B is driven before the steel sheet pile 104, thereby aligning the top ends of the connecting member 10B and the steel sheet pile 104. Alternatively, if the connecting member 10B and the steel sheet pile 104 are fitted together on the ground and driven simultaneously, the top ends of the connecting member 10B and the steel sheet pile 104 can be aligned regardless of the driving order of the steel sheet piles. Even if the steel sheet pile 104 has been driven first, the connecting member 10B can be driven if it is positioned higher than the steel sheet pile 104, that is, if the upper end of the connecting member 10B is higher than the upper end of the steel sheet pile 104, and therefore the protruding upper end of the connecting member 10B may be cut off after the connecting member has been driven in this manner.

[0027] 12 is a diagram showing a third example of a steel sheet pile wall according to an embodiment of the present invention. In the illustrated example, a steel sheet pile wall 100C including steel sheet piles 107 and 108 is constructed using a connecting member 10C. The extension direction D4 of the portion of the steel sheet pile wall 100C including the steel sheet pile 107 differs by approximately 90 degrees from the extension direction D5 of the portion including the steel sheet pile 108. The connecting member 10C has a shape optimized for connecting the steel sheet piles 107 and 108 at such corners without using corner steel sheet piles.

[0028] 13 is a diagram showing a fourth example of a steel sheet pile wall according to an embodiment of the present invention. In the illustrated example, a steel sheet pile wall 100D including steel sheet piles 109, 110, 111, 112, and 113 is configured using a connecting member 10D. In the steel sheet pile wall 100D, a steel sheet pile 111 is arranged as a partition wall between a wall including the steel sheet piles 109 and 110 and a wall including the steel sheet piles 112 and 113, and the connecting member 10D is arranged at a branch portion between each wall and the steel sheet pile 111. More specifically, a joint portion of the steel sheet pile 109 (first steel sheet pile) is fitted into a first joint portion of the connecting member 10D, a joint portion of the steel sheet pile 110 (second steel sheet pile) is fitted into a second joint portion of the connecting member 10D, and a joint portion of the steel sheet pile 111 (third steel sheet pile) is fitted into a third joint portion of the connecting member 10D, thereby forming a branch portion. The same applies to the branching sections between the steel sheet piles 111, 112, and 113. Because the steel sheet piles are connected to each other at the branching sections via the connecting member 10D, it is not necessary to use deformed steel sheet piles, and the steel sheet piles 109 to 113 can be the same type of steel sheet piles. By using a connecting member such as the connecting member 10D, which has a large tolerance in the fitting angle when fitted with the joint part of the steel sheet piles by forming a substantially circular bulge at the tip of the joint part, it is possible to absorb positional deviation due to dimensional errors or construction errors of the steel sheet pile 111 arranged as a partition wall between two wall bodies.

[0029] 14 is a diagram showing a fifth example of a steel sheet pile wall according to an embodiment of the present invention. In the illustrated example, a steel sheet pile wall 100E including steel sheet piles 114, 115, 116, 117, 118, and 119 is configured using a connecting member 10E. In the steel sheet pile wall 100E, steel sheet piles 116 and 117 are arranged as partition walls between a wall including steel sheet piles 114 and 115 and a wall including steel sheet piles 118 and 119, and connecting members 10E are arranged at the junctions between the respective wall bodies and the steel sheet piles 116 and 117. A branch section is formed by fitting the joint of the steel sheet pile 114 (first steel sheet pile) into the first joint of the connecting member 10E, fitting the joint of the steel sheet pile 115 (second steel sheet pile) into the second joint of the connecting member 10E, and fitting the joint of the steel sheet pile 116 (third steel sheet pile) into the third joint of the connecting member 10E. The same applies to the branch sections between the steel sheet piles 117, 118, and 119. The connecting member 10E has four joints, but as in the illustrated example, only three of the joints are used to fit with the joints of the steel sheet piles, and the connecting member 10E may be driven into the ground without fitting the remaining joints.

[0030] 15 is a diagram showing a sixth example of a steel sheet pile wall according to an embodiment of the present invention. In the illustrated example, a steel sheet pile wall 100F including steel sheet piles 120 is constructed using connecting members 10F. The connecting members 10F are arranged at corners of the steel sheet pile wall 100F and fit into joints of the steel sheet piles 120 on both sides. As described above, since both joints of the connecting members 10F include retaining portions, the connecting members 10F can be arranged not only at corners but also at bent portions of various angles, and different types of steel sheet piles can be connected.

[0031] Fig. 16 is a diagram showing a seventh example of a steel sheet pile according to an embodiment of the present invention. In the illustrated example, a steel sheet pile wall 100H including steel sheet piles 121 and 122 is constructed using a connecting member 10H. The steel sheet pile 121 is a hat-shaped steel sheet pile, and the steel sheet pile 122 is a U-shaped steel sheet pile. In the connecting member 10H, two joint portions are formed on both sides of the gripping portion. Therefore, for example, as in the example of Fig. 16, the gripping portions are arranged in the wall thickness direction (a direction intersecting the extension direction of the wall), and the shape of the wall, specifically the positions of the steel sheet piles 121 and 122 in the wall thickness direction, are adjusted by the length of the gripping portions. [Explanation of symbols]

[0032] 10A to 10H...connecting member, 11...gripping portion, 12A to 12E...joint portion, 12F1 to 12H1...first joint portion, 12F2 to 12H2...second joint portion, 51...chuck portion, 100A to 100H...steel sheet pile wall, 101 to 122...steel sheet pile.

Claims

1. A connecting member for a steel sheet pile, which is a long member and has a cross-sectional shape: A flat-plate-shaped gripping portion having a length that can be gripped by a construction machine; first and second joint portions formed at an end of the gripping portion, each of which can be fitted into a joint of the steel sheet pile; wherein the first and second joint portions are formed only at one end of the grip portion.

2. The connecting member according to claim 1 , further comprising a third joint portion formed at one end of the same gripping portion as the first and second joint portions and capable of fitting into a joint of a steel sheet pile.

3. The connecting member according to claim 2, further comprising a fourth joint portion formed at one end of the same gripping portion as the first, second and third joint portions and capable of fitting into a joint of a steel sheet pile.

4. The connecting member according to claim 1 , wherein the first and second joint portions are respectively engageable with joints of different types of steel sheet piles.

5. The connecting member according to claim 1 , wherein the cross-sectional aspect ratio is 3.0 or more.

6. The connecting member according to claim 1 , wherein the length of the gripping portion in cross section is 100 mm or more.

7. The connecting member according to claim 1; a first steel sheet pile including a joint portion that is fitted into the first joint portion; a second steel sheet pile including a joint portion that is fitted into the second joint portion; and Steel sheet pile walls including.

8. The steel sheet pile wall according to claim 7 , wherein the first and second steel sheet piles are different types of steel sheet piles.

9. The steel sheet pile wall according to claim 7 , wherein an extension direction of a portion including the first steel sheet pile is different from an extension direction of a portion including the second steel sheet pile in the steel sheet pile wall.

10. the connecting member further includes a third joint portion formed at an end of the grip portion, The steel sheet pile wall according to claim 7 , further comprising a third steel sheet pile including a joint portion that is fitted into the third joint portion.

11. The steel sheet pile wall according to claim 7, wherein the tolerance in the fitting angle when fitting the joint portion of the first steel sheet pile with the first joint portion is greater than the tolerance in the fitting angle when fitting the joint portions of steel sheet piles of the same type as the first steel sheet pile.

12. The steel sheet pile wall according to claim 7 , wherein a minimum plate thickness of the connecting member at the first joint portion is greater than a minimum plate thickness of the first steel sheet pile at the joint portion.

13. A method for manufacturing a connecting member according to claim 1, A method for manufacturing a connecting member, wherein the entire member including the gripping portion and the first and second joint portions is integrally formed by hot rolling, cold rolling, or hot extrusion.

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