Coping concrete block, and installation method of the same

Abstract

To provide a coping concrete block which has a simplified shape used when installed at an upper end of a sheet pile wall, which is capable of making a coping placement block inexpensive, and which enables an opening at a bottom of a coping concrete block defined by a coping concrete block and a sheet pile wall to be blocked by a simple on-site work.SOLUTION: A coping concrete block comprises: a rectangular front wall having a planar extension in a vertical plane; a rectangular rear wall 2-2 having a planar extension in a vertical plane and spaced by a predetermined distance from the front wall 2-1; one or more connecting beams connecting upper ends of the front wall 2-1 and the rear wall 2-2 to each other; and a plurality of support plates 2-5 connected to a lower end surface of the front wall and extending toward a lower end surface of the rear wall. The front wall 2-1, the rear wall 2-2, the connecting beams, and the support plates 2-5 are integrally molded. An upper surface opening is provided on an upper surface of the coping concrete block.SELECTED DRAWING: Figure 12

Description

[Technical field]

[0001] The present invention relates to sheet pile walls constructed for revetment purposes in ports, waterways, rivers, and lakes, and more specifically to cap concrete blocks that are installed at the upper ends of sheet pile walls constructed for such revetment purposes, and to a construction method for installing such blocks. [Background technology]

[0002] Sheet pile walls, which are constructed by driving a large number of sheet piles into the ground, are often used as a method for constructing revetment walls in ports, waterways, rivers, and lakes. When driving sheet piles having a hat-shaped cross section into the ground, it is common to arrange the piles so that the convex and concave sides of the hat shape are arranged alternately across the width of the sheet pile wall.

[0003] Therefore, in a sheet pile wall, convex and concave surfaces are arranged alternately horizontally and parallel to the sheet pile wall surface on both the front side of the sheet pile wall, which is the water side, and the rear side, which is the land side.

[0004] In this way, multiple sheet piles are driven into the ground with their orientation alternating, thereby integrating them together to increase the strength of the sheet pile wall, and in order to improve the appearance of the top of the sheet pile wall, a construction method is adopted in which a cap concrete block is installed at the top of the sheet pile wall to cover it and concrete is poured into the space inside the cap concrete.

[0005] Patent Document 1 discloses a method as one of the conventional methods for installing a cap concrete block at the upper end of a sheet pile wall. In the method disclosed in Patent Document 1, (1) At the upper end of a row of sheet piles, which is formed by driving sheet piles into the ground, a capping block is placed on the inside of one of the side walls and has a bottom plate with a tip edge shaped to fit the side shape of the row of sheet piles.The capping block is placed in contact with a height-adjustable bracket installed at the upper end of the row of sheet piles. (2) Here, the end edge of the bottom plate of the capping block is formed as a slope with the upper side receding from the tip of the underside of the bottom plate, so that a wedge-shaped gap that continues in a zigzag pattern in the longitudinal direction and has a cross-sectional shape that is wider at the upper side is formed between the inner surface of the side wall on the side where the bottom plate of the capping block is provided and the side of the sheet pile row. (3) A gap material with a wedge-shaped cross-section is inserted into the gap from above, and the gap is sealed with the gap material. (4) The capping block is installed by pouring concrete into the space between one side wall of the capping block formed by the above-mentioned method, the bottom plate, and the side of the sheet pile row, and allowing it to harden. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] JP 2008-75408 A

[0007] However, in the installation method for the capsid blocks disclosed in Patent Document 1, a bottom plate whose tip edge is shaped to follow the side shape of the sheet pile row is integrally attached to the inside of one of the side walls of the capsid block, and the end edge of the bottom plate of the capsid block is formed as a slope whose upper side recedes relative to the tip of the underside of the base plate, resulting in an extremely complex shape of the capsid blocks, which results in the capsid blocks being expensive.

[0008] In addition, in the installation method for the capsid blocks disclosed in Patent Document 1, after the capsid blocks are installed at the upper end of the sheet pile row, a gap material with a wedge-shaped cross-section that continues in a zigzag pattern and is wedge-shaped in cross-section is inserted into the wedge-shaped gap that is formed between the tip edge of the bottom plate of the capsid block on the side where the bottom plate is installed and the side of the sheet pile row, and which continues in a zigzag pattern in the longitudinal direction and has a wider upper cross-sectional shape. This insertion work was performed manually through the upper opening of the Kasagi block, and it had to be carried out in the narrow area of ​​the Kasagi block's internal space, in poor visibility conditions, which made on-site work difficult and led to high costs. Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been made to solve such problems, and provides a cap concrete block that simplifies the shape of the cap concrete block used when installing it at the upper end of a sheet pile wall, making the cap concrete block inexpensive, and enables the opening at the bottom of the cap concrete block defined by the cap concrete block and the front side of the sheet pile wall to be blocked by simple on-site work. Furthermore, the present invention provides a method for installing cap concrete blocks that can simplify on-site work to the utmost in installation work using the cap concrete blocks of the present invention. [Means for solving the problem]

[0010] In order to solve the above problems, the invention according to a first aspect provides a cap concrete block having the following configuration. In a concrete cap block installed at the top of a sheet pile wall constructed by driving multiple sheet piles into the ground, A rectangular plate-shaped front wall having a planar extent in a vertical plane; A rectangular plate-like rear wall having a planar extent in a vertical plane at a predetermined distance from the front wall; One or more connecting beams connecting the upper ends of the front wall and the rear wall to each other; a plurality of support plates connected to the lower end surface of the front wall and extending toward the lower end surface of the rear wall; The front wall, the rear wall, the connecting beam, and the support plate are integrally formed, The top of the cap concrete block has an opening at the top. The cap is made of concrete blocks.

[0011] In addition, in the invention according to the second aspect, a cap concrete block is provided having the following configuration. That is, In the cap concrete block of the first aspect of the invention, A plate-like body (B) having a rectangular shape that can be inserted into the upper part of the support plate from the upper opening of the cap concrete inside the cap concrete block; and a plate-shaped body (A) that can be inserted into the upper part of the support plate from the upper opening of the cap concrete inside the cap concrete block. One side end of the plate-like body (A) is made into a cap concrete block having a shape that fits the unevenness of the sheet pile wall surface and can abut against the sheet pile wall surface.

[0012] In addition, in the invention according to a third aspect, a cap concrete block is provided having the following configuration. That is, In the cap concrete block according to the first or second aspect of the invention, The support plate is a concrete cap block bent into an L shape.

[0013] In addition, in the invention according to a fourth aspect, a cap concrete block is provided having the following configuration. That is, In the cap concrete block of the invention according to the second aspect, The cap concrete block is configured so that a space equivalent to the thickness of the plate-shaped body (B) is provided between the lower end surface of the front wall of the cap concrete block and the upper surface of the support plate.

[0014] In addition, in the invention according to a fifth aspect, a cap concrete block is provided having the following configuration. That is, In the cap concrete block of the invention according to the second aspect, The cap concrete block is configured so that one side end of the plate-like body (A), which fits along the unevenness of the sheet pile wall surface and has a shape that can abut against the sheet pile wall surface, is provided with a string-like elastic body to achieve sealing between the plate-like body (A) and the sheet pile wall surface.

[0015] In addition, in the invention according to a sixth aspect, a cap concrete block is provided having the following configuration. That is, In the cap concrete block of the invention according to the second aspect, The cap concrete block is configured such that the plate-like body (A) and the plate-like body (B) are made of iron plates and further include magnets to prevent relative positional shifting between the plate-like body (A) and the plate-like body (B) in the horizontal plane.

[0016] Furthermore, the invention according to a seventh aspect provides a method for installing a cap concrete block having the following configuration. A method for constructing a sheet pile wall by driving a plurality of sheet piles into the ground, comprising installing a cap concrete block according to the second to sixth aspects of the invention at the upper end of the sheet pile wall, (1) A step of installing a plurality of height adjustment members at an upper end of a sheet pile wall and leveling the top surfaces of the plurality of height adjustment members; (2) installing one or more cap concrete blocks by abutting the lower surface of the connecting beam of the cap concrete block against the top surfaces of the plurality of height adjustment members; (3) inserting the plate-shaped body (A) and the plate-shaped body (B) from the top opening of the cap concrete block to the inside of the cap concrete block and to the top of the support plate; (4) A step of spreading the plate-shaped body (A) and the plate-shaped body (B) along the upper surface of the support plate in a horizontal plane to close an opening on the underside of the cap concrete block defined by the lower end of the front wall of the cap concrete block and the front side of the sheet pile wall; (5) A step of pouring concrete into a space defined by the front wall, rear wall, plate-like body (A), plate-like body (B), and the land side ground from the top opening of the cap concrete block, and hardening the concrete, thereby integrating the cap concrete block and the sheet pile wall; The installation method consisted of the following:

[0017] In addition, the invention according to an eighth aspect is a method for installing a cap concrete block having the following configuration. That is, A method for constructing a sheet pile wall by driving a plurality of sheet piles into the ground, comprising installing a cap concrete block according to the second to sixth aspects of the invention at the upper end of the sheet pile wall, (1) A step of installing a plurality of height adjustment members at an upper end of a sheet pile wall and leveling the top surfaces of the plurality of height adjustment members; (2) inserting the plate-shaped body (A) and the plate-shaped body (B) from the top opening of the cap concrete block into the interior of the cap concrete block and onto the upper part of the support plate; (3) installing one or more cap concrete blocks by abutting the lower surfaces of the connecting beams of the cap concrete blocks against the top surfaces of the plurality of height adjustment members; (4) A step of spreading the plate-shaped body (A) and the plate-shaped body (B) along the upper surface of the support plate in a horizontal plane to close an opening on the underside of the cap concrete block defined by the lower end of the front wall of the cap concrete block and the front side of the sheet pile wall; (5) A step of pouring concrete into a space defined by the front wall, rear wall, plate-like body (A), plate-like body (B), and the land side ground from the top opening of the cap concrete block, and hardening the concrete, thereby integrating the cap concrete block and the sheet pile wall; A method for installing cap concrete blocks, comprising: Effect of the Invention

[0018] The cap concrete block of the present invention has a simple shape, making it possible to manufacture the cap concrete block at low cost. In addition, when installing the cap concrete block of the present invention at the upper end of a sheet pile wall, the opening at the bottom of the cap concrete block defined by the cap concrete block and the front side of the sheet pile wall can be blocked by simple on-site work, thereby simplifying on-site work. In addition, when installing the cap concrete block of the present invention at the upper end of a sheet pile wall, workers can access it from the rear side, which is the land side, without having to access it from the front side of the sheet pile wall, which is the water side (i.e., from above the water), thereby simplifying the installation work. Furthermore, after concrete is poured into the space defined by the front wall, rear wall, plate-shaped body (A), plate-shaped body (B), and the landside ground of the cap concrete block and allowed to harden, plate-shaped body (A) and plate-shaped body (B) become integrated with the cap concrete block and the sheet pile wall, so there are no parts that need to be removed after the poured concrete has hardened, further simplifying the installation work of the cap concrete block. As described above, it has become possible to simplify the installation work of the cap concrete blocks, which has made it possible to reduce the installation costs of the cap concrete blocks to the minimum. [Brief description of the drawings]

[0019] [Figure 1] Figure 1 is a plan view of a sheet pile wall before the cap concrete block is placed, and is a diagram for defining the names of each face of the sheet pile wall. [Diagram 2] FIG. 2 shows an example of a cap concrete block, and shows a perspective view of the cap concrete block (support plate is not shown). [Diagram 3] FIG. 3 shows a cross-sectional view of the cap concrete block shown in FIG. 2, and also shows a support plate integral with the cap concrete block. [Figure 4] FIG. 4 shows a plan view and a side view of a plate-like body (A) according to the present invention. [Diagram 5] FIG. 5 shows a plan view and a side view of a plate-like body (B) according to the present invention. [Figure 6] FIG. 6 shows a plan view and a side view of an auxiliary plate according to the present invention. [Figure 7] Figure 7 is a cross-sectional view showing the state in which a cap concrete block is placed on the upper end of the sheet pile wall by abutting the underside of the connecting beam of the cap concrete block against the top surfaces of multiple height adjustment members, and also showing the state in which plate-shaped body (A) and plate-shaped body (B) are inserted inside the cap concrete block. [Figure 8] Figure 8 is a cross-sectional view showing the plate-shaped body (A) and plate-shaped body (B) shown in Figure 7 placed horizontally on a support plate, blocking the underside opening of the cap concrete block defined by the front wall of the cap concrete block and the front side of the sheet pile wall. [Figure 9] FIG. 9 is a plan view showing the state in which the underside opening of the cap concrete block is blocked by plate-like body (A) and plate-like body (B) as shown in FIG. [Figure 10] FIG. 10 is a front view and a side view of the height adjustment member. [Figure 11] FIG. 11 shows an example of a support plate, showing a front view and a side view of the support plate. [Figure 12] FIG. 12 shows the state in which concrete has been poured into the internal space of the cap concrete block. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a plan view of a sheet pile wall 1 before a cap concrete block 2 is placed, and is a diagram for defining the names of each face of the sheet pile wall 1.

[0021] Generally, when constructing a revetment wall at a port, waterway, river, or lake using a sheet pile wall 1 constructed by driving a large number of sheet piles into the ground, the sheet piles are arranged so that the hat-shaped convex and concave surfaces of the sheet piles are arranged alternately horizontally across the sheet pile wall 1.

[0022] In this specification, the land side of the sheet pile wall 1 shown in FIG. 1 is referred to as the rear side, and the water side is referred to as the front side.

[0023] Next, we will explain the cap concrete block 2. Various types of cap concrete blocks can be used as the cap concrete block 2, but in this specification, we will explain the cap concrete block 2 of the type shown in Figures 2 and 3 as an example.

[0024] The cap concrete block 2 according to the present invention is a precast concrete block, and is composed of a front wall 2-1, a rear wall 2-2, and a connecting beam 2-3. The front wall 2-1 is a rectangular plate-like part that extends two-dimensionally within the vertical plane (a plane extending in the up, down, left and right directions in FIG. 2) of the cap concrete block 2. The rear wall 2-2 is disposed at a predetermined distance from the front wall 2-1, and is also a rectangular plate-like part that extends two-dimensionally within the vertical plane, similar to the front wall 2-1.

[0025] The connecting beam 2-3 is a part for connecting the front wall 2-1 and the rear wall 2-2 to integrate them, and one or more connecting beams 2-3 are provided in one cap concrete block 2. Because this connecting beam 2-3 is arranged so as to connect the upper parts of the front wall 2-1 and the rear wall 2-2, a lower space 2-4, which is a space that is connected below the connecting beam 2-3 and extends in the longitudinal direction of the cap concrete block 2 (the horizontal direction in Figure 2).

[0026] In addition, an opening is provided on the upper surface of the cap concrete block 2 between the connecting beams 2-3, and access to the lower space 2-4 of the cap concrete block 2 is provided through this opening.

[0027] In addition, a support plate 2-5 as shown in Figure 3 is disposed at the lower end of the front wall 2-1 of the cap concrete block 2 (this support plate 2-5 is omitted in the cap concrete block 2 shown in Figure 2).

[0028] This support plate 2-5 is composed of an L-shaped angle iron having a specified plate width as shown in Figure 11, and when the concrete hardens to form the front wall 2-1, rear wall 2-2, and connecting beam 2-3, one side of the L-shape of the support plate 2-5 is embedded in the lower end of the front wall 2-1 and the remaining side of the L-shape of the support plate 2-5 is positioned so that it extends toward the lower end of the rear wall 2-2 of the cap concrete block 2, so that the front wall 2-1, rear wall 2-2, connecting beam 2-3, and support plate 2-5 are formed as a single unit.

[0029] The support plate 2-5 can be manufactured by bending an iron or steel plate, but is not limited to this and other materials such as plastic or FRP can also be used.

[0030] 11 is described as being made of an L-shaped angle bar having a predetermined width, but it is not limited to this and may be a shape in which the width gradually changes. Also, regarding the length of each side of the L-shape of the support plate 2-5, support plates 2-5 having sides of different lengths may be combined for use.

[0031] 3, a predetermined space S may be provided between an upper surface 2-5-1 of the side of the support plate 2-5 extending from the lower end of the front wall 2-1 toward the lower end of the rear wall 2-2 and the lower end surface 2-1-1 of the front wall 2-1. Furthermore, by setting this space S to the same dimension as the plate thickness of a plate-like body (B) 2-7 described later, it becomes possible to insert a part of the plate-like body (B) 2-7 into this space S.

[0032] In the above explanation, the support plate 2-5 has been described as being formed by embedding a portion of the support plate 2-5 into the lower end of the front wall 2-1 and integrating the front wall 2-1, the rear wall 2-2, the connecting beam 2-3, and the support plate 2-5, but this is not limited to this. For example, after the front wall 2-1, the rear wall 2-2, and the connecting beam 2-3 are integrally formed, a rectangular support plate 2-5 may be attached to the lower end surface 2-1-1 of the front wall 2-1 via a bolt or the like and positioned so as to satisfy the above-mentioned conditions.

[0033] In addition, in the cap concrete block 2 shown in Fig. 2, the longitudinal length (horizontal direction in Fig. 2) of the front wall 2-1 and the rear wall 2-2 are drawn as being the same, but this is not limited to this. For example, the longitudinal length of the front wall 2-1 may be made longer than the longitudinal length of the rear wall 2-2, or conversely, the longitudinal length of the wall 2-1 may be made shorter than the longitudinal length of the rear wall 2-2. By doing so, even if the shape of the sheet pile wall 1 viewed from above is curved, it is possible to freely arrange the cap concrete block 2 along the shape of the sheet pile wall 1.

[0034] Next, we will explain the plate-shaped body (A) 2-6 and plate-shaped body (B) 2-7 used to block the opening defined between the lower end of the front wall 2-1 of the cap concrete block 2 and the front wall surface of the sheet pile wall 1 (an opening formed in the lower surface of the cap concrete block 2, which is an opening formed on the front side of the sheet pile wall 1).

[0035] FIG. 4 shows a plan view and a side view of the plate-like body (A) 2-6, and FIG. 5 shows a plan view and a side view of the plate-like body (B) 2-7. As shown in Fig. 4, one side end (the upper outer edge in Fig. 4) of the plate-like body (A) 2-6 has a shape that fits along the unevenness of the front side wall surface of the sheet pile wall 1 and can abut against the wall surface of the sheet pile wall 1. Also, as shown in Fig. 5, the plate-like body (B) 2-7 has a rectangular plate shape.

[0036] The widths of the plate-like body (A) 2-6 and the plate-like body (B) 2-7 shown in Figures 4 and 5 are drawn as lengths equivalent to one pitch of the unevenness of the wall surface of the sheet pile wall 1, but are not limited to this. The widths of the plate-like body (A) 2-6 and the plate-like body (B) 2-7 can also be set to a length equal to or greater than the length of one pitch.

[0037] In addition, the plate-shaped body (A) 2-6 and the plate-shaped body (B) 2-7 can be deployed along the upper surface 2-5-1 of the support plate 2-5 in a horizontal plane, so as to close the underside opening of the cap concrete block 2 defined by the lower end of the front wall 2-1 of the cap concrete block 2 and the front side of the sheet pile wall 1.

[0038] At this time, one side end of the plate-like body (A) 2-6 follows the unevenness of the front side wall surface of the sheet pile wall 1 and is in contact with the front side wall surface of the sheet pile wall 1, and a part of the plate-like body (B) 2-7 can be inserted into the space S. At this time, the adjacent ends of the plate-like body (A) 2-6 and the plate-like body (B) 2-7 may be partially overlapped or may be butted together. Also, if a gap occurs between the adjacent ends of the plate-like body (A) 2-6 and the plate-like body (B) 2-7, an auxiliary plate 2-8 as shown in Figure 6 may be used to close the gap.

[0039] As described above, after arranging the plate-shaped body (A) 2-6 and the plate-shaped body (B) 2-7 along the horizontal plane of the upper surface 2-5-1 of the support plate 2-5 and closing the opening defined between the lower end of the front wall 2-1 of the cap concrete block 2 and the front side wall surface of the sheet pile wall 1, the plate-shaped body (A) 2-6 and the plate-shaped body (B) 2-7 may be fixed to the support plate 2-5 using a magnet 4 to prevent the plate-shaped body (A) 2-6 and the plate-shaped body (B) 2-7 from shifting.

[0040] Figure 10 shows an example of a height adjustment member 3 used when placing a cap concrete block 2 at the top end of a sheet pile wall 1. The height adjustment member 3 is equipped with a hook portion 3-1 for hooking onto the top end surface of the sheet pile wall 1, a restraining bolt 3-2 for fixing the hook portion 3-1 to the top end of the sheet pile wall 1, and a positioning bolt 3-3 attached to the hook portion 3-1 and capable of being adjusted in the vertical direction.

[0041] A number of height adjustment members 3 are placed on the upper end of the sheet pile wall 1, and by rotating and adjusting the positioning bolts 3-3 of each height adjustment member 3, the upper end faces of the positioning bolts 3-3 of each height adjustment member 3 (referred to as the top faces 3-4 of the height adjustment members 3) are positioned on a horizontal plane. The cap concrete block 2 is placed on the upper end of the sheet pile wall 1 by abutting the lower faces of the connecting beams 2-3 of the cap concrete block 2 against the top faces 3-4 of the multiple height adjustment members 3.

[0042] By doing as described above, it is possible to place the cap concrete block 2 on the upper end of the sheet pile wall 1 while maintaining it in a horizontal state. It is preferable that the hook portion 3-1, the restraining bolt 3-2, and the positioning bolt 3-3 of the height adjustment member 3 are made of a metal material such as steel.

[0043] Next, a first embodiment of a construction method for installing the cap concrete block 2 according to the present invention will be described.

[0044] To construct a revetment wall in a port, waterway, river, or lake, a number of height adjustment members 3 are placed on the upper end of a sheet pile wall 1 constructed by driving a large number of sheet piles into the ground. At this time, as shown in Figure 8, the hook portion 3-1 is placed so that it fits into the top portion of the sheet pile that constitutes the sheet pile wall 1, and the retaining bolt 3-2 is rotated to clamp the sheet pile between the tip of the retaining bolt 3-2 and the hook portion 3-1, thereby fixing the height adjustment member 3 to the sheet pile.

[0045] Next, the positioning bolts 3-3 of the height adjustment members 3 are rotated to adjust so that the upper end faces of the positioning bolts 3-3 (top faces 3-4 of the height adjustment members 3) are positioned in the same horizontal plane.

[0046] Next, the lower surfaces of the connecting beams 2-3 of the cap concrete block 2 are abutted against the top surfaces 3-4 of the leveled multiple height adjustment members 3, and the cap concrete block 2 is placed on the top surfaces 3-4 of the multiple height adjustment members 3 so that the center of the cap concrete block 2 coincides with the center line of the sheet pile wall 1. Because the top surfaces 3-4 of the multiple height adjustment members 3 have already been leveled, the cap concrete block 2 can be placed on top of the sheet pile wall 1 with its upper surface remaining horizontal.

[0047] Next, the plate-like body (A) 2-6 and the plate-like body (B) 2-7 are inserted from the top opening of the cap concrete block 2 into the lower space 2-4 of the cap concrete block 2 and above the support plate 2-5 (see FIG. 7).

[0048] Next, as shown in Figure 8, the plate-like body (A) 2-6 and the plate-like body (B) 2-7 placed in the lower space 2-4 of the cap concrete block 2 are expanded so as to lie along the horizontal plane on the upper surface 2-5-1 of the support plate 2-5, and one side end of the plate-like body (A) 2-6 having unevenness is abutted against the front side wall surface of the sheet pile wall 1. Also, the plate-like body (B) 2-7 is disposed with a portion of one end side inserted into the space S provided between the upper surface 2-5-1 of the support plate 2-5 and the lower end surface 2-1-1 of the front wall 2-1.

[0049] By arranging the plate-shaped body (A) 2-6 and the plate-shaped body (B) 2-7 in this manner, the underside opening of the cap concrete block 2 defined by the lower end of the front wall 2-1 of the cap concrete block 2 and the front side of the sheet pile wall 1 can be blocked.

[0050] At this time, the adjacent ends of the plate-like body (A) 2-6 and the plate-like body (B) 2-7 may be partially overlapped or butted together. If a gap occurs between the adjacent ends of the plate-like body (A) 2-6 and the plate-like body (B) 2-7, an auxiliary plate 2-8 may be used to close the gap.

[0051] As described above, after closing the opening defined between the lower end of the front wall 2-1 of the cap concrete block 2 and the front side wall surface of the sheet pile wall 1, in order to prevent the plate-shaped body (A) 2-6 and the plate-shaped body (B) 2-7 from shifting position and causing a gap, the plate-shaped body (A) 2-6 and the plate-shaped body (B) 2-7 may be fixed to the support plate 2-5 using a magnet 4.

[0052] Furthermore, in order to prevent unhardened concrete from leaking from the area where the front wall surface of the sheet pile wall 1 abuts against the plate-shaped body (A) 2-6, a string-shaped elastic body 6 may be placed on the edge of the plate-shaped body (A) 2-6 abutting against the front wall surface of the sheet pile wall 1.

[0053] Next, as shown in Figure 12, concrete is poured from the top opening of the cap concrete block 2 into the space defined by the front wall 2-1, rear wall 2-2, plate-shaped body (A) 2-6, plate-shaped body (B) 2-7, and the landside ground of the cap concrete block 2, and allowed to harden, thereby integrating the cap concrete block 2 and the sheet pile wall 1. In addition, an opening will be defined between the lower end of the rear wall 2-2 of the cap concrete block 2 and the rear wall surface of the sheet pile wall 1, but in order to block this opening, adjustments are made so that the ground on the land side is present at this position.

[0054] Next, a second embodiment of the method for installing the cap concrete block 2 according to the present invention will be described.

[0055] The second embodiment of the installation method for the cap concrete block 2 differs from the first embodiment only in the order of the steps for inserting the plate-shaped body (A) 2-6 and the plate-shaped body (B) 2-7 from the top opening of the cap concrete block 2 into the lower space 2-4 of the cap concrete block 2 and into the upper part of the support plate 2-5.

[0056] In the first embodiment, the cap concrete block 2 was placed on the top surfaces 3-4 of multiple height adjustment members 3, and then plate-shaped body (A) 2-6 and plate-shaped body (B) 2-7 were inserted into the lower space 2-4 of the cap concrete block 2.In the second embodiment, the cap concrete block 2 is placed on the top surfaces 3-4 of the multiple height adjustment members 3, and then plate-shaped body (A) 2-6 and plate-shaped body (B) 2-7 are inserted into the lower space 2-4 of the cap concrete block 2.

[0057] Other than this point, there is no difference between the installation method according to the first embodiment and the installation method according to the second embodiment. [Explanation of symbols]

[0058] 1. Sheet Pile Wall 2 Concrete Cap Block 2-1 Front wall 2-1-1 Bottom end surface 2-2 Back wall 2-3 Connecting beam 2-4 Lower space 2-5 Support plate 2-5-1 Top surface 2-6 Plate-shaped body (A) 2-7 Plate-shaped body (B) 2-8 Auxiliary board 3 Height adjustment member 3-1 Hook part 3-2 Retaining bolt 3-3 Positioning bolt 3-4 Top surface 4. Magnet 5. Concrete 6 Elastic Body S Space

Claims

1. A cap concrete block to be installed at the top of a sheet pile wall constructed by driving a plurality of sheet piles into the ground, A rectangular plate-shaped front wall having a planar extent in a vertical plane; A rectangular plate-like rear wall having a planar extent in a vertical plane at a predetermined distance from the front wall; One or more connecting beams connecting the upper ends of the front wall and the rear wall to each other; a plurality of support plates connected to the lower end surface of the front wall and extending toward the lower end surface of the rear wall; The front wall, the rear wall, the connecting beam, and the support plate are integrally formed, The top of the cap concrete block has an opening at the top. A concrete block with a cap.

2. The cap concrete block according to claim 1, A plate-like body (B) having a rectangular shape that can be inserted into the upper part of the support plate from the upper opening of the cap concrete inside the cap concrete block; and a plate-shaped body (A) that can be inserted into the upper part of the support plate from the upper surface opening of the cap concrete inside the cap concrete block. One side end of the plate-like body (A) has a shape that follows the unevenness of the sheet pile wall surface and can abut against the sheet pile wall surface. A concrete block with a cap.

3. The cap concrete block according to claim 1 or 2, The support plate has an L-shaped bent shape. A concrete block with a cap.

4. The cap concrete block according to claim 2, A space corresponding to the thickness of the plate-shaped body (B) is provided between the lower end surface of the front wall of the cap concrete block and the upper surface of the support plate. A concrete block with a cap.

5. The cap concrete block according to claim 2, A string-like elastic body is provided on one side end of the plate-like body (A), which is shaped to fit the unevenness of the sheet pile wall surface and can contact the sheet pile wall surface, to achieve sealing between the plate-like body (A) and the sheet pile wall surface. A concrete block with a cap.

6. The cap concrete block according to claim 2, The plate-shaped body (A) and the plate-shaped body (B) are made of iron or steel plates, and the plate-shaped body (A) and the plate-shaped body (B) are further provided with a magnet for preventing relative positional deviation in a horizontal plane. A concrete block with a cap.

7. A method for constructing a sheet pile wall by driving a plurality of sheet piles into the ground, comprising installing the cap concrete block according to any one of claims 2 to 6, (1) A step of installing a plurality of height adjustment members at the upper end of the sheet pile wall and leveling the top surfaces of the plurality of height adjustment members; (2) installing one or more cap concrete blocks by abutting the lower surface of the connecting beam of the cap concrete block against the top surfaces of the plurality of height adjustment members; (3) inserting the plate-shaped body (A) and the plate-shaped body (B) into the inside of the cap concrete block and onto the upper part of the support plate from the top opening of the cap concrete block; (4) A step of spreading the plate-shaped body (A) and the plate-shaped body (B) along the upper surface of the support plate in a horizontal plane to close the underside opening of the cap concrete block defined by the lower end of the front wall of the cap concrete block and the front side of the sheet pile wall; (5) A step of pouring concrete from the top opening of the cap concrete block into a space defined by the front wall, rear wall, plate-like body (A), plate-like body (B), and the land-side ground, and allowing it to harden, thereby integrating the cap concrete block and the sheet pile wall; A method for installing cap concrete blocks, comprising:

8. A method for constructing a sheet pile wall by driving a plurality of sheet piles into the ground, comprising installing the cap concrete block according to any one of claims 2 to 6, (1) A step of installing a plurality of height adjustment members at the upper end of the sheet pile wall and leveling the top surfaces of the plurality of height adjustment members; (2) inserting the plate-shaped body (A) and the plate-shaped body (B) into the cap concrete block from the top opening of the cap concrete block and into the upper part of the support plate; (3) installing one or more cap concrete blocks by abutting the lower surface of the connecting beam of the cap concrete block against the top surfaces of the plurality of height adjustment members; (4) A step of spreading the plate-shaped body (A) and the plate-shaped body (B) along the upper surface of the support plate in a horizontal plane to close the underside opening of the cap concrete block defined by the lower end of the front wall of the cap concrete block and the front side of the sheet pile wall; (5) A step of pouring concrete from the top opening of the cap concrete block into a space defined by the front wall, rear wall, plate-like body (A), plate-like body (B), and the land-side ground, and allowing it to harden, thereby integrating the cap concrete block and the sheet pile wall; A method for installing cap concrete blocks, comprising:

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