Connection member, steel sheet pile wall and method for manufacturing connection 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 the connecting member.

Background Art

[0002] Due to obstacles in existing structures and the shape of the excavation site, the steel sheet pile wall may be bent in its planar shape. When bending beyond the fitting margin of the joints of the steel sheet piles, such as at the corner, a corner steel sheet pile with special joints is used. Also, when a branch is required in the steel sheet pile wall, a deformed steel sheet pile with a shape like a combination of a part of another steel sheet pile on one steel sheet pile is used. Since the corner steel sheet pile and the deformed steel sheet pile are factory processed, they need to be managed separately from other sheet piles at the site, which complicates the process. For the corner steel sheet pile, it is necessary to classify the types according to the bending shape, and for the deformed steel sheet pile, it becomes unstable when stacked, so it is necessary to additionally use a spacing retainer or the like, making transportation not easy. In view of these points, connecting members for steel sheet piles as described in, for example, Patent Document 1, Patent Document 2, and Patent Document 3 have been proposed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] For example, in Patent Document 1 mentioned above, a central pressure-resistant part with a substantially rectangular cross-section is formed between connection parts that fit into joints of steel sheet piles, and it is described that both sides of this central pressure-resistant part are used as support surfaces and gripped by a heavy machine. However, when driving a connecting member into the ground using a heavy machine, the central pressure-resistant part with a large thickness and rectangular cross-section has a large press-fitting resistance, and since the entire connecting member including the connection part has a cross-sectional shape with many convex parts, there is a problem such as the need to use a plurality of spacing retainers during storage by stacking, which is troublesome. Note that since the connecting members described in Patent Document 2 and Patent Document 3 are fitted into joints of steel sheet piles before driving the steel sheet piles into the ground, no part for gripping by a heavy machine is provided.

[0005] Therefore, an object of the present invention is to provide a connecting member that can be gripped by a construction machine and driven into the ground, which enables stable gripping by the construction machine while reducing the press-fitting resistance and facilitating handling such as storage, a steel sheet pile wall using the connecting member, and a method for manufacturing the connecting member.

Means for Solving the Problems

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

[10] A steel sheet pile wall including the connecting member according to any one of [1] to [9], a first steel sheet pile including a joint part to be fitted into the first joint part, and a second steel sheet pile including a joint part to be fitted into the second joint part.

[11] The first and second steel sheet piles are different types of steel sheet piles in the steel sheet pile wall according to

[10] .

[12] In the steel sheet pile wall according to

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

[13] The connecting member further includes a third joint part formed at an end of the gripping part, and the steel sheet pile wall further includes a third steel sheet pile including a joint part to be fitted into the third joint part according to

[10] .

[14] In the steel sheet pile wall according to

[10] , the margin at the fitting angle when fitting the joint part of the first steel sheet pile and the first joint part is larger than the margin at the fitting angle when fitting joint parts of steel sheet piles of the same type as the first steel sheet pile.

[15] In the steel sheet pile wall according to

[10] , the minimum plate thickness in the first joint part of the connecting member is larger than the minimum plate thickness in the joint part of the first steel sheet pile.

[16] A method for manufacturing the connecting member according to any one of [1] to [9], wherein the whole including the gripping part and the first and second joint parts is integrally formed by hot rolling, cold rolling or hot extrusion.

Advantages of the Invention

[0007] According to the configuration as described above, the connecting member can be stably gripped by the flat-shaped gripping portion with a construction machine, and the press-fitting resistance at the gripping portion during casting can be reduced. Further, since the joint portion protrudes on at least one side in the plate thickness direction of the gripping portion, for example, the connecting members can be stably stacked and stored by arranging the gripping portion and the joint portion alternately, and it is easy to handle.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Mode for Carrying Out the Invention

[0009] Below, the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, for components having substantially the same functional configuration, the same reference numerals are attached and duplicate explanations are omitted.

[0010] FIG. 1 is a diagram showing a first example of a connecting member of 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 in the cross-sectional shape, it includes a flat gripping portion 11 and a joint portion 12A formed at the end of the gripping portion 11. The gripping portion 11 has a length that can be gripped by the chuck portion 51 of the construction machine as shown in FIG. 1(b). The construction machine is, for example, a vibratory hammer or a press-fitting machine. Here, the length of the gripping portion 11 means 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 in the plate thickness direction of the gripping portion 11 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, 124A (first, second, third, and fourth joint portions) that can each be fitted to the joint 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 a connecting member 10A can be stably stacked and stored by arranging the gripping part 11 and the joint part 12A alternately as shown in Fig. 1(c). In this case, the connecting member 10A at the lowermost stage may be arranged such that the gripping part 11 is horizontal using a spacer having the same height as that at which the joint part 12A protrudes from the gripping part 11, for example. Alternatively, the members may be stacked obliquely according to the inclination of the lowermost connecting member 10A. In either case, gaps are formed between the gripping parts 11 of the stacked connecting members and between the gripping part 11 of the lowermost connecting member and the ground or the floor surface. Therefore, when the chuck part 51 of the construction machine is thin, for example, the gripping part 11 of the connecting member 10A stored in a stacked manner can be directly gripped.

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

[0013] FIG. 4 shows an example of a connecting member 10D in which the joint portion 12D includes three joint portions 121D, 122D, and 123D (first, second, and third joint portions), and FIG. 5 shows an example of a connecting member 10E in which the joint portion 12E includes four joint portions 121E, 122E, 123E, and 124E (first, second, third, and fourth joint portions) different from the example of FIG. 1. In the examples of FIGS. 4 and 5, substantially circular bulging portions are formed at the tips of the respective joint portions. Such a bulging portion can also make the margin at the fitting angle when fitting the joint portion of the steel sheet pile to the joint portions 121D to 123D or the joint portions 121E to 124E larger than, for example, the margin at the fitting angle when fitting the joint portions of the steel sheet piles to each other. A connecting member including three or more joint portions as in the example of FIG. 1 and the examples of FIGS. 4 and 5 may be used, for example, at the branching portion of the steel sheet pile wall as in the example described later, or a joint portion for fitting the joint of the steel sheet pile may be selected according to the type of the steel sheet pile and the bending angle of the steel sheet pile wall.

[0014] In the connecting member described with reference to FIGS. 1 to 5 above, the gripping portion 11 is not a portion used for connecting the steel sheet piles. However, since the flat gripping portion 11 enables the connecting member to be stably gripped by a construction machine, the step of pre-fitting and welding the connecting member to the steel sheet pile is unnecessary, and the connecting member can be placed while adjusting the angle and the like according to the placement position of the immediately preceding steel sheet pile. Further, since the dimension in the plate thickness direction of the gripping portion 11 is smaller than the dimension of the joint portion, the press-fitting resistance at the gripping portion 11 during placement can be reduced. Since the joint portion protrudes on at least one side in the plate thickness direction of the gripping portion 11, for example, the connecting members can be stably stacked and stored by arranging the gripping portion 11 and the joint portion alternately, and the handling is easy.

[0015] Figs. 6 to 8 are views showing the 6th to 8th examples of the connecting member of the steel sheet pile according to the embodiment of the present invention. In these examples, unlike the examples of Figs. 1 to 5, the joint portions are formed at both ends of the gripping portion 11, respectively. In each figure, (a) shows the whole of the long connecting member, (b) shows the cross section of the connecting member gripped by the chuck portion 51 of the construction machine, and (c) shows the state where a plurality of connecting members are stacked, which is the same as the examples of Figs. 1 to 5. Fig. 6 shows an example of a connecting member 10F in which a first joint portion 12F1 is formed at one end of the gripping portion 11 and a second joint portion 12F2 is formed at the other end of the gripping portion 11. The first joint portion 12F1 and the second joint portion 12F2 each consist of one joint portion including a holding portion. Such a connecting member 10F can also be stably stacked and stored by inverting the connecting members to be stacked as shown in Fig. 6(c) and aligning the positions of the joint portions 12F1, 12F2 and the gripping portion 11. If the heights at which the joint portions 12F1, 12F2 respectively protrude from the gripping portion 11 are about the same, the gripping portion 11 of the lowermost connecting member can be arranged 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), since the joint portions 12G1 and 12G2 of the connecting member 10G protrude on both sides in the plate thickness direction of the gripping portion 11, they can be stacked without being inverted. 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. Also 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 FIGS. 7 and 8 may be used, for example, at a branch portion of a steel sheet pile wall as in the example described later, or a joint portion for fitting a joint of the steel sheet pile may be selected according to the type of the steel sheet pile and the bending angle of the steel sheet pile wall.

[0017] Even with the connecting members described with reference to FIGS. 6 to 8 above, the connecting members can be stably gripped by the flat gripping portion 11 with a construction machine, and the press-fitting resistance at the gripping portion 11 during placement can be reduced. Further, for example, by alternately arranging the gripping portion 11 and the joint portions, the connecting members can be stably stacked and stored, and they are easy to handle. Since the joint portions are formed on both sides of the gripping portion 11, for example, many types of joints can be formed to correspond to various types and connection angles of the steel sheet piles. Also, the shape of the wall body can be adjusted by the length of the gripping portion.

[0018] Incidentally, the length of the connecting member according to the present embodiment as described above, that is, the dimension in the depth direction during placement, may be the same as or different from that of the steel sheet pile to be connected. Specifically, when the steel sheet pile wall is an earth retaining wall, the connecting member is not necessarily required in the root embedding 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 root embedding portion. Further, when the required length cannot be ensured due to restrictions on transportation means or storage space, the connecting member may be longitudinally spliced. For the longitudinal splicing joint, for example, butt welding, or fillet welding or bolt joining using an attachment plate can be used.

[0019] The connecting member according to the present embodiment as described above may be manufactured by integrally forming the entire body including the gripping portion and the joint portion by hot rolling, cold rolling, or hot extrusion. By integrally forming by the manufacturing method as described above, even when a complex-shaped curved surface such as a recessed portion or a curved surface is formed at the joint portion, it can be easily manufactured. Further, the connecting member may be manufactured by a 3D printer. When the connecting member can be manufactured using a 3D printer in real time even outside the factory, for example, the connecting member can be manufactured by setting an appropriate shape and rotation margin according to the state of the steel sheet pile on site.

[0020] FIG. 9 is a diagram for explaining an example of the dimensions of the connecting member of the steel sheet pile according to the embodiment of the present invention. In FIG. 9, as an example of the connecting member described above with reference to FIG. 1, the aspect ratio a / b of the cross section, the length L of the gripping portion, the plate thickness t1 of the gripping portion, and the minimum plate thickness t2 in the joint portion are shown. The aspect ratio a / b of the cross section is represented by setting the dimension in the first direction in which the flat gripping portion extends in the cross section of the connecting member as a, and the dimension in the second direction orthogonal to the first direction as b. The larger the flat portion is and the smaller the protrusion of the joint portion is, the larger the aspect ratio a / b becomes. Conversely, the shorter the flat portion is and the larger the protrusion of the joint portion is, the smaller the aspect ratio a / b becomes.

[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 the 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 the torsional deformation of the connecting member, the competition when fitting the joint part of the connecting member driven into the ground with the joint part of the steel sheet pile driven in advance can be reduced, and the connecting member can be driven smoothly. Furthermore, by suppressing the torsional deformation of the driven connecting member, the driving of the next steel sheet pile to be connected can also be made smooth.

[0022] Also, 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 the construction machine. However, in order to be grippable by a general construction machine, the length L of the gripping portion is preferably 100 mm or more. By ensuring a sufficient length L of the gripping portion, the load can be transmitted more reliably from the construction machine during driving or removal, and stable construction can be achieved without dropping the connecting member. When 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 about 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 and reducing the press-fitting resistance, it is preferably 9 mm or more and 20 mm or less, and more preferably 10 mm or more. The minimum plate thickness t2 in the joint portion is not particularly limited either, but it is preferably larger than the minimum plate thickness in the joint portion of the steel sheet pile to be fitted. Thereby, higher load-bearing capacity is exhibited in the joint portion of the connecting member than in the joint portion of the steel sheet pile, and it is possible to suppress the connecting member from detaching from the steel sheet pile due to deformation of the connecting member.

[0023] Hereinafter, an example of a steel sheet pile wall using the connecting member described above will be described. Although each example is described as using a specific type of connecting member, it is also possible to construct 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 view showing 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. In this way, when the first and second steel sheet piles connected by the connecting member 10A are different types of steel sheet piles, and thus the shapes of the joint portions of the respective steel sheet piles are different, for example, by appropriately designing the shape and angle of the joint portion of the connecting member 10A, the joint portion of the connecting member 10A can be fitted to the respective joint portions of the steel sheet piles 101 and 102 to construct a steel sheet pile wall. The types of steel sheet piles connected by the connecting member are not limited to hat-shaped and U-shaped, and may be Z-shaped, straight steel sheet piles, etc.

[0025] FIG. 11 is a view showing 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 a connecting member 10B. The extension direction D1 of the portion 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 in the steel sheet pile wall 100B are different. That is, the connecting member 10B is disposed at the bent portion of the steel sheet pile wall 100B. Since the steel sheet piles are connected to each other via the connecting member 10B at the bent portion, corner steel sheet piles do not need to be used, and the steel sheet piles 103 to 106 can be of 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 the connecting member 10B in which a holding portion is formed at the joint portion and the margin at the fitting angle when fitting with the joint portion of the steel sheet pile is large, the angle of the corresponding bent portion can have a width.

[0026] In the example of FIG. 11 described above, the arm portion of the steel sheet pile 104 and the gripping portion of the connecting member 10B are in close contact in the planar arrangement. When the steel sheet pile 104 has been driven in first, it is difficult to grip the gripping portion of the connecting member 10B and drive it with the same upper end height as the steel sheet pile 104. In such a case, for example, by driving in order from the side of the steel sheet pile 103 and driving the connecting member 10B before the steel sheet pile 104, the upper end heights of the connecting member 10B and the steel sheet pile 104 can be made the same. Alternatively, if the connecting member 10B and the steel sheet pile 104 are pre-fitted on the ground and driven in simultaneously, the upper end heights of the connecting member 10B and the steel sheet pile 104 can be made the same regardless of the driving order of the steel sheet piles. Even if the steel sheet pile 104 has been driven in first, driving is possible if the connecting member 10B is made to stop 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. Therefore, after driving in such a manner, the protruding upper end portion of the connecting member 10B may be cut off.

[0027] FIG. 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 configured 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 and the extension direction D5 of the portion including the steel sheet pile 108 are approximately 90 degrees different. The connecting member 10C has a shape optimized for connecting the steel sheet piles 107 and 108 without using a corner steel sheet pile at such a corner portion.

[0028] FIG. 13 is a view 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 disposed as a partition wall between a wall body including the steel sheet piles 109 and 110 and a wall body including the steel sheet piles 112 and 113, and the connecting member 10D is disposed at a branch portion between each wall body 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 branch portion between the steel sheet piles 111, 112, and 113. Since the steel sheet piles are connected to each other via the connecting member 10D at the branch portion, it is not necessary to use a special-shaped steel sheet pile, and it is also possible to use the same type of steel sheet pile for the steel sheet piles 109 to 113. By using a connecting member such as the connecting member 10D in which a substantially circular bulging portion is formed at the tip of the joint portion and the margin at the fitting angle when fitting with the joint portion of the steel sheet pile is large, it is possible to absorb the displacement due to the dimensional error or construction error of the steel sheet pile 111 disposed as a partition wall between the two wall bodies.

[0029] FIG. 14 is a view 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, 119 is configured using a connecting member 10E. In the steel sheet pile wall 100E, steel sheet piles 116, 117 are arranged as partition walls between a wall body including steel sheet piles 114, 115 and a wall body including steel sheet piles 118, 119, and the connecting member 10E is arranged at a branch portion between each wall body and the steel sheet piles 116, 117. A joint portion of the steel sheet pile 114 (first steel sheet pile) fits into a first joint portion of the connecting member 10E, a joint portion of the steel sheet pile 115 (second steel sheet pile) fits into a second joint portion of the connecting member 10E, and a joint portion of the steel sheet pile 116 (third steel sheet pile) fits into a third joint portion of the connecting member 10E, thereby forming a branch portion. The same applies to the branch portions between the steel sheet piles 117, 118, 119. The connecting member 10E has four joint portions, but as in the illustrated example, only three of the joint portions are used for fitting with the joint portions of the steel sheet piles, and the connecting member 10E may be driven into the ground with the remaining joint portions not fitting.

[0030] FIG. 15 is a view 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 a steel sheet pile 120 is configured using a connecting member 10F. The connecting member 10F is arranged at a corner portion of the steel sheet pile wall 100F and fits into joint portions of the steel sheet piles 120 on both sides. As described above, since both joint portions of the connecting member 10F include holding portions, it can be arranged not only at corner portions but also at bent portions with various angles, or different types of steel sheet piles can be connected.

[0031] FIG. 16 is a view 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, 122 is configured 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, since two joint portions are formed on both sides of the gripping portion, for example, as in the example of FIG. 16, the gripping portion is arranged in the wall thickness direction (a direction intersecting with the extension direction of the wall body), and the shape of the wall body is adjusted by the length of the gripping portion, specifically, the position in the wall thickness direction of the steel sheet piles 121, 122.

Explanation of Symbols

[0032] 10A to 10H... connecting members, 11... gripping part, 12A to 12E... joint parts, 12F1 to 12H1... first joint parts, 12F2 to 12H2... second joint parts, 51... chuck part, 100A to 100H... steel sheet pile walls, 101 to 122... steel sheet piles.

Claims

1. A connecting member for steel sheet piles, having, in terms of cross-sectional shape, a flat gripping portion having a length that can be gripped by construction machinery, 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. A connecting member comprising the above.

2. The connecting member according to claim 1, wherein the first and second joint portions are formed only at one end of the gripping portion.

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

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

5. The connecting member according to claim 1, wherein the first joint portion is formed at one end of the gripping portion, and the second joint portion is formed at the other end of the gripping portion.

6. The connecting member according to claim 5, wherein the first and second joint portions each include a plurality of joint portions.

7. The connecting member according to claim 1, wherein the first and second joint portions are each capable of being fitted into joints of different types of steel sheet piles.

8. The connecting member according to claim 1, having an aspect ratio of the cross-section of 3.0 or more.

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

10. A steel sheet pile wall comprising the connecting member according to any one of claims 1 to 9, a first steel sheet pile including a joint portion to be fitted into the first joint portion, and a second steel sheet pile including a joint portion to be fitted into the second joint portion. A steel sheet pile wall comprising the above.

11. The steel sheet pile wall according to claim 10, wherein the first and second steel sheet piles are different types of steel sheet piles.

12. The steel sheet pile wall according to claim 10, wherein in the steel sheet pile wall, the extending direction of the portion including the first steel sheet pile is different from the extending direction of the portion including the second steel sheet pile.

13. The connecting member further comprises a third joint portion formed at the end of the gripping portion, and the steel sheet pile wall further includes a third steel sheet pile including a joint portion to be fitted into the third joint portion.

14. The margin at the fitting angle when fitting the joint part of the first steel sheet pile and the first joint part is larger than the margin at the fitting angle when fitting the joint parts of steel sheet piles of the same type as the first steel sheet pile. The steel sheet pile wall according to claim 10.

15. The minimum plate thickness at the first joint part of the connecting member is larger than the minimum plate thickness at the joint part of the first steel sheet pile. The steel sheet pile wall according to claim 10.

16. A method for manufacturing a connecting member according to any one of claims 1 to 9, A method for manufacturing a connecting member, wherein the whole including the gripping part and the first and second joint parts is integrally formed by hot rolling, cold rolling or hot extrusion.

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