Method for constructing flexible sheet pile wall of sluice gate section

Abstract

To provide a method for constructing a flexible sheet pile wall of a sluice gate section, which can be constructed without the need for welding or cutting on site.SOLUTION: A method for constructing a flexible sheet pile wall of a sluice gate section includes, when constructing a flexible sheet pile wall 1 provided with vertical flexible joints 23 and horizontal flexible joints 24 in the vertical and horizontal directions, a first step of casting a lower sheet pile wall 10 below where the horizontal flexible joints 24 in the horizontal direction are located, a second step of casting a wound flexible sheet pile 20 in which the horizontal flexible joints 24 in the horizontal direction are connected to a middle part of the vertical flexible joints 23, by fitting and connecting them to both sides of the lower sheet pile wall 10, and a third step of casting an upper sheet pile wall 50 with a mounting width for the horizontal flexible joints 24 in the horizontal direction. In the third step, positioning portions 29, 53 for positioning the lower end position of an upper steel sheet pile 51 to be connected are formed and cast in a fitting connection portion 28 of the flexible sheet pile 20 to which the upper steel sheet pile 51 is fitted and connected, and in the fitting connection portion 52 of the adjacent upper steel sheet pile 51 to be fitted and connected.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for constructing a flexible sheet pile wall at a sluice gate. [Background technology]

[0002] When installing culverts, such as culverts and sluice gates for water intake and discharge across a river levee, impermeable walls made of steel sheet piles are installed on the inside and outside of the sluice gates. Steel sheet pile impermeable walls prevent damage to the levee and sluice gates by installing flexible joints in the steel sheet piles so that they can follow ground movements, etc. For example, in the steel sheet pile joint disclosed in Patent Document 1, flexible sheet piles with both edge portions of flexible joints attached between the plate-shaped portions of the steel sheet pile split vertically in half are installed on both sides of the culvert section to absorb displacement. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2005-256410 Summary of the Invention [Problem to be solved by the invention]

[0004] The flexible sheet pile disclosed in Patent Document 1 has a smaller ability to absorb vertical displacement than horizontal displacement, and in order to improve this, flexible joints need to be installed in the left and right directions. However, when attempting to install flexible joints in the horizontal direction in the middle of a steel sheet pile, it becomes necessary to create a space in the steel sheet pile wall after casting to accommodate the flexible joints, which requires work such as fusing and welding of support members that hold the upper sheet pile wall. This not only requires qualified workers skilled in welding and fusing, but also increases the amount of work required for on-site preparation and transportation of equipment. Furthermore, the welding and fusing work can cause thermal damage to flexible joints such as rubber.

[0005] The present invention was made in consideration of the problems of the conventional technology, and aims to provide a method for constructing a flexible sheet pile wall at a sluice gate section that can be constructed without the need for on-site welding or cutting. [Means for solving the problem]

[0006] The construction method of the flexible sheet pile wall of the sluice gate portion of the present invention for solving the above problems is as follows: When constructing a flexible sheet pile wall with flexible joints in the vertical and horizontal directions at a sluice gate crossing a river levee, A first step of placing a lower sheet pile wall below the flexible joint in the left-right direction; A second step of driving a flexible sheet pile, in which the flexible joint in the left-right direction is connected to the intermediate portion of the flexible joint in the up-down direction, into both sides of the lower sheet pile wall by fitting and connecting them; and a third step of placing an upper sheet pile wall with a mounting width of the flexible joint in the left-right direction, In the second step, a reinforcing member is provided that is detachably attached by a fastening member to the portion of the intermediate part of the flexible sheet pile to which the flexible joint is connected in the left-right direction, to ensure rigidity during casting and to be removed after casting. It is characterized by:

[0007] The method for constructing a flexible sheet pile wall at a sluice gate of the present invention is as follows: When constructing a flexible sheet pile wall with flexible joints in the vertical and horizontal directions at a sluice gate crossing a river levee, A first step of placing a lower sheet pile wall below the flexible joint in the left-right direction; A second step of driving a flexible sheet pile, in which the flexible joint in the left-right direction is connected to the intermediate portion of the flexible joint in the up-down direction, into both sides of the lower sheet pile wall by fitting and connecting them; and a third step of placing an upper sheet pile wall with a mounting width of the flexible joint in the left-right direction, In the third step, a positioning portion for positioning the lower end position of the upper sheet pile to be connected is formed in the fitting connection portion of the flexible sheet pile to which the upper sheet pile is fitted and connected and the fitting connection portion of the adjacent upper sheet pile to be fitted and connected, and then the positioning portion is driven. It is characterized by:

[0008] The method for constructing a flexible sheet pile wall at a sluice gate of the present invention is as follows: When constructing a flexible sheet pile wall with flexible joints in the vertical and horizontal directions at a sluice gate crossing a river levee, A first step of placing a lower sheet pile wall below the flexible joint in the left-right direction; A second step of driving a flexible sheet pile, in which the flexible joint in the left-right direction is connected to the intermediate portion of the flexible joint in the up-down direction, into both sides of the lower sheet pile wall by fitting and connecting them; and a third step of placing an upper sheet pile wall with a mounting width of the flexible joint in the left-right direction, After the third step, a fourth step is provided in which a lower mounting member is provided above the lower sheet pile wall to mount the lower edge portion of the flexible joint in the left-right direction via a position adjustment member that can adjust the position up, down, left, and right, and the central connecting portion is connected via a clamping member that is tightened by a fastening member. It is characterized by:

[0009] After the fourth step, it is preferable to have a fifth step in which a spacing member is detachably attached to an upper mounting member above the lower mounting member, which attaches the upper edge of the flexible joint in the left-right direction, using a fastening member, and the central connecting portion is connected via the clamping member which is tightened by the fastening member.

[0010] It is preferable that the lower mounting member and the upper mounting member are connected to each other via an adjustment member whose length is adjusted in the center.

[0011] The method for constructing a flexible sheet pile wall at a sluice gate of the present invention is as follows: When constructing a flexible sheet pile wall with flexible joints in the vertical and horizontal directions at a sluice gate crossing a river levee, A first step of placing a lower sheet pile wall below the flexible joint in the left-right direction; A second step of driving a flexible sheet pile, in which the flexible joint in the left-right direction is connected to the intermediate portion of the flexible joint in the up-down direction, into both sides of the lower sheet pile wall by fitting and connecting them; and a third step of placing an upper sheet pile wall with a mounting width of the flexible joint in the left-right direction, The flexible joints in the left and right directions are unwound from both sides and attached to the upper and lower attachment members with their respective edge portions facing the center, and the center edge portions are overlapped and attached to each other by forming thin-walled molded portions, and are then attached to the attachment members with clamping members that are tightened by fastening members. It is characterized by: [Effects of the Invention]

[0012] According to the method for constructing a flexible sheet pile wall in a sluice gate section of the present invention, a flexible sheet pile wall in a sluice gate section can be constructed without the need for welding or cutting on site. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is an enlarged view of a flexible sheet pile portion according to one embodiment of the method for constructing a flexible sheet pile wall of a sluice gate portion of the present invention. FIG. [Figure 2] FIG. 2 is a schematic perspective view of a protruding portion of a lateral flexible joint according to an embodiment of the present invention. [Figure 3] 1A and 1B are a front view and a plan view, respectively, of a cutout portion of an embodiment of the present invention. [Figure 4] 1A, 1B, and 1C are a front view, a plan view, and a side view, respectively, of a reinforcing member for a cutout portion according to an embodiment of the present invention. [Figure 5] FIG. 2 is an assembly diagram of a reinforcing member of a vertical flexible joint according to an embodiment of the present invention. [Figure 6] 1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a front and rear perspective view of a chucking member according to an embodiment of the present invention. [Figure 7] FIG. 1 is a front view of an installed state of a lateral flexible joint according to an embodiment of the present invention. [Figure 8] FIG. 1 is a plan view of a lower sheet pile wall portion according to an embodiment of the present invention. [Figure 9]1A, 1B, and 1C are a plan view, a front view, and a side view, respectively, of a clamping member according to an embodiment of the present invention. [Figure 10] 1A is a front view of a position adjusting member according to an embodiment of the present invention, FIG. 1B is a front view of an assembled state, and FIG. 1C is a front view of a position adjusting plate. [Figure 11] 1A, 1B, and 1C are a perspective view, a rear view, and a front view, respectively, of a clamping member according to an embodiment of the present invention. [Figure 12] 1A is a front view of the upper and lower mounting members on which a horizontal flexible joint according to an embodiment of the present invention is installed, FIG. 1B is a central cross-sectional view, and FIG. 1C is a cross-sectional view of the anchor bolt portion. [Figure 13] 1A and 1B are cross-sectional and side views, respectively, of a bonding portion of a horizontal flexible joint according to an embodiment of the present invention. [Figure 14] FIG. 2 is a cross-sectional view of an installed state of a lateral flexible joint according to an embodiment of the present invention. [Figure 15] FIG. 1 is a front view of a flexible sheet pile wall according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, one embodiment of a method for constructing a flexible sheet pile wall for a sluice gate portion of the present invention will be described in detail with reference to the drawings. The method for constructing a flexible sheet pile wall at a sluice gate section, as shown in Figure 15, allows for the construction of a flexible sheet pile wall 1 at a sluice gate section B that crosses a river embankment A, with flexible joints 23, 24 in the vertical and horizontal directions, without the need for on-site welding or cutting. In this embodiment, all steps including each invention will be described regarding a method for constructing a flexible sheet pile wall 1 of a sluice gate section B.

[0015] (1) Excavation of the river embankment sluice gate and construction of the lower sheet pile wall The part of the river levee A where the sluice gate section B will be installed is excavated, and a floor moat surface E with a low central flat section C and an inverted trapezoidal cross section with slopes D on both sides is formed (see Figure 15). The floor moat surface E should be at least 100 mm lower than the installation height of the lower sheet pile wall 10 below the sluice gate section B, and should be large enough to ensure working space on both sides. The lower sheet pile wall 10 is cast in the central flat area C of the floor trench surface E, below where the horizontal flexible joints 24 are located (first step). As shown in Figures 1, 14, and 15, the lower sheet pile wall 10 is formed by connecting and casting the required number of steel sheet piles 11 according to the installation width of the sluice gate section B, and arranging them with their tops 12 protruding by 100 mm or more to form the lower sheet pile wall 10. The protruding parts of the tops 12 of the lower sheet pile wall 10 will be buried in the sheet pile-wrapped concrete 67 in a later step (see Figure 14).

[0016] (2) Driving flexible sheet piles Flexible sheet piles 20 are driven on both sides of the lower sheet pile wall 10. As shown in Figures 1 and 2, the flexible sheet pile 20 is constructed by cutting the web portion 22 of a steel sheet pile 21 in half from the center, attaching a flexible rubber vertical flexible joint 23 to the entire vertical length, and integrally connecting a T-shaped horizontal flexible joint 24 protruding left and right from the middle of the vertical flexible joint 23. The flexible sheet pile 20 has a notch 26 formed in a flange portion 25 on the sluice gate section B side, and the horizontal flexible joints 24 protruding left and right from the notch 26. When driving the flexible sheet pile 20 equipped with the T-shaped vertical flexible joint 23 and horizontal flexible joint 24, the horizontal flexible joints 24 protruding left and right are held in a wound state during driving (second step).

[0017] When casting the flexible sheet pile 20, a reinforcing member 30 is provided in the cutout 26 from which the horizontal flexible joint 24 in the middle of the flexible sheet pile 20 protrudes, and is detachably attached with a fastening member 33 such as a bolt and nut to ensure rigidity during casting and is removed after casting, eliminating the need to fuse after casting as in conventional construction sites. As shown in Figures 3 and 4, the reinforcing member 30 comprises two fixing portions 31 which are pre-welded to the upper and lower flange portions 25 of the cutout portion 26 of the flexible sheet pile 20, and a reinforcing portion 32 which is connected between the fixing portions 31.

[0018] The reinforcing portion 32 is fixed to the fixing portion 31 with fastening members 33 consisting of bolts 33a and nuts 33b. The fixing portion 31 comprises a rectangular horizontal plate 31a, a vertical plate 31b protruding from one edge of the horizontal plate 31a along the flange portion 25, and a reinforcing plate 31c closing one end of the horizontal plate 31a and the vertical plate 31b, and the edges of these three plates 31a to 31c that abut at right angles are welded together. A bolt hole is formed in the horizontal plate 31a. The fixing portion 31 is installed above and below the notch portion 26 with the two horizontal plates 31a facing each other.

[0019] The reinforcing part 32 is welded so that the upper and lower horizontal fixing plates 32a and the vertical plates 32b and reinforcing plates 32c connecting them can be attached between the horizontal plates 31a of the fixing part 31, and bolt holes are formed in the horizontal fixing plates 32a. As a result, by inserting the bolts 33a of the fastening members 33 into the bolt holes between the fixing plates 32a and the horizontal plates 31a of the fixing part 31 and tightening them with nuts 33b, the notched parts 26 of the flexible sheet pile 20 are reinforced, and rigidity can be ensured during concrete pouring. In addition, the reinforcing member 30 may be installed not only on the outside of the flange portion 25 of the flexible sheet pile 20, but also on the inside of the flange portion 25 or on both sides, as long as it can ensure the necessary rigidity depending on the ground such as the river embankment A to be cast.

[0020] Ensuring rigidity of flexible sheet piles The flexible sheet pile 20 ensures the rigidity of the steel sheet pile 21 through the notches 26, and also ensures the rigidity of the divided flexible sheet pile 20 through the vertical flexible joints 23, allowing for smooth driving. As shown in Figure 5, left and right reinforcing fixing members 35 are welded to the flanges 25 and arms 27 of the flexible sheet pile 20 on both sides of the vertical flexible joints 23. Nuts 35b are welded to the inside of through holes formed in the vertical surfaces 35a of the fixing members 35. These two fixing members 35 are connected by left and right connecting members 36 so as to straddle them, and rigidity is ensured by tightening the tightening bolts 36a to the nuts 35b. The left and right connecting members 36 are attached in advance at intervals in the vertical direction of the flexible sheet pile 20 to ensure rigidity. As the flexible sheet pile 20 is driven, they are sequentially removed and driven, and the fixing members 35 are buried as they are. This ensures the rigidity of the flexible sheet pile 20 during casting, and anyone can easily proceed with the work without the need to melt and remove the left and right connecting members 36 that are fixed by welding during casting as in the past.

[0021] Chucking member In order to cast the flexible sheet pile 20, a chucking member 38 must be attached to the top of the flexible sheet pile 20. Until now, the steel sheet pile 21 has been made longer than the top of the flexible sheet pile 20 in advance to reinforce it and serve as a chucking part (note that Figures 1 and 15 show the state before fusing), and it was necessary to fuse it after casting was completed. As shown in Figure 6, the chucking member 38 is formed by welding four fixing members 37 for chucking to the top of the flexible sheet pile 20, for example, to the inner and outer surfaces of the web portion 22. Through holes are formed in the horizontal portion 37a of the fixing member 37 and reinforced with reinforcing materials, and nuts 37b are welded to the underside. The chucking member 38 is fixed to these four fixing members 37 by tightening with tightening bolts 38a. The chucking member 38 has horizontal plates 38c welded to the lower end of the vertical plate 38b at four locations and reinforced with reinforcing materials. Bolt insertion holes are formed in the horizontal plate 38c of the chucking member 38 corresponding to the through holes in the horizontal portion 37a of the fixing member 37, and the fixing members are stacked and fixed with tightening bolts 38a. As a result, when driving the flexible sheet pile 20, the vertical plate 38b of the chucking member 38 attached with the tightening bolt 38a can be grasped and driven, and after driving is completed, the tightening bolt 38a can be loosened and removed, eliminating the need for melting as before.

[0022] The flexible sheet pile 20 has notches 26 that ensure the rigidity of the steel sheet pile 21 and protect the buried portion of the vertical flexible joint 23 when the joint is cast. A protective member 40 is used to protect the vertical flexible joint 23. As shown in Figures 1 and 2, the protective member 40 has an L-shaped cross-section and is firmly fixed at one end edge to one flange 25 of the steel sheet pile 21 by welding or other means. This secures a space for the vertical flexible joint 23 and covers the outside. The other end edge of the protective plate 41 is welded to the other flange 25 at intervals using multiple connecting pieces 42 with sufficient strength to prevent the plate from coming off during casting but to allow it to come off when a large force is applied to the flexible sheet pile 20. For example, the connecting pieces 42 are attached by spot welding or other means. This prevents damage to the vertical flexible joint 23 during casting and allows it to absorb displacement when functioning as a flexible sheet pile wall 1. Furthermore, when driving the flexible sheet pile 20, a pointed tip member is installed at the lower end as in the past, but the tip member is attached by welding so that it will come off with a large displacement. This eliminates the need for on-site welding or cutting work.

[0023] (3) Construction of the upper sheet pile wall The upper sheet pile wall 50 is constructed inside the flexible sheet pile 20 by fitting the connecting parts 28 at the ends of the arm parts 27 together, and the required number of sheets are installed, leaving space for the installation of the culvert parts B on both sides (see Figure 1). When constructing the upper sheet pile wall 50, it is necessary to hold the upper steel sheet pile 51 in a predetermined position and leave space for the installation of the horizontal flexible joints 24 in the left-right direction, and until now this has been supported and fixed by welding. Here, as shown in Figures 1 and 2, a positioning part 29 that acts as a stopper is formed on the connecting part 28 of the arm part 27 on the inside of the culvert part B of the flexible sheet pile 20, and by crushing the connecting part 28, it is not possible to insert it any further. Similarly, the positioning portion 53 of the upper steel sheet pile 51 to be installed next crushes the connecting portion 52 inside the culvert portion B of the upper steel sheet pile 51 of the upper sheet pile wall 50, preventing it from being inserted any further.

[0024] (4) Installation of horizontal flexible joints The horizontal flexible joint 24 protruding left and right from the flexible sheet pile 20 is installed via a lower mounting member 60 and an upper mounting member 70 provided between the lower sheet pile wall 10 and the upper sheet pile wall 50, as shown in Figures 7 to 12. (4-1) Connection of the lower and upper mounting members To fix the upper and lower central edge portions 24a of the horizontal flexible joint 24, a lower mounting member 60 and an upper mounting member 70 are attached so as to connect the notched portions 26 of the flexible sheet piles 20 on both sides. As shown in Figure 3, mounting brackets 61, 71 are welded and fixed to the web portions 22 of the notched portions 26 of the flexible sheet piles 20 so as to protrude at a right angle, and nuts 61a, 71a are welded to the outer surfaces of the sluice gate portion B in the left and right directions so that bolts can be inserted through them. The lower mounting member 60 and the upper mounting member 70 are made of angle bars with an L-shaped cross section, and the ends that are connected to the mounting brackets 61, 71 are closed, and they are connected by tightening bolts to the nuts 61a, 71a of the mounting brackets 61, 71. The lower mounting member 60 and the upper mounting member 70 have bolt holes formed at regular intervals on the vertical surfaces 60a, 70a of the angle members for fastening the top and bottom of the horizontal flexible joint 24 with bolts and nuts.

[0025] Adjusting the length of the upper and lower mounting parts The lower mounting member 60 and the upper mounting member 70 are installed from both the left and right ends to match the width of the sluice gate section B, and the lengths of the lower mounting member 60 and the upper mounting member 70 are adjusted in advance in the center using adjustment members 62, 72 of several lengths, for example, in increments of 3 to 10 cm, to absorb construction errors and allow for connection. For example, if the width of the sluice gate section B is 6.4 m, then four 1.5 m upper and four 1.5 m lower mounting members 60, 70 will be prepared to ensure a 6 m length, and although the design calls for 40 cm adjustment members 62, 72 in the center, adjustment members of 45 cm or 35 cm, for example, in 5 cm increments, are prepared to take construction errors into account. Furthermore, the upper and lower mounting members 60, 70 may be two each of 1.5 m and 1.4 m, and a plurality of adjustment members 62, 72 may be prepared in finer increments of 3, 5, 7, or 10 cm to absorb any errors, or one side of the upper and lower mounting members 60, 70 may be two 1.5 m members and the other side may be a combination of one 1.5 m member and one 1.4 m member. In other words, by combining standard-sized upper and lower mounting members 60, 70 with adjustment members 62, 72 whose lengths have been changed in advance, it is possible to absorb construction errors and connect them without requiring welding or cutting.

[0026] Clamping member for connecting part The lower mounting member 60 or the upper mounting member 70 and the adjustment members 62, 72 are connected using sandwiching members 63, 73, which connect the members without relying on welding as in the past. As shown in Figures 9, 11, and 12, the sandwiching members 63, 73 are formed by welding, for example, four nuts 63b, 73b to the outside of one of two side plates 63a, 73a with a U-shaped cross section, and a tightening bolt 63c, 73c is inserted through each of them. The connection portions of the lower mounting member 60 or the upper mounting member 70 are sandwiched between the two side plates 63a, 73a and clamped by the tips of the tightening bolts 63c, 73c, thereby achieving connection. Alternatively, the connection portions of the lower mounting member 60 or the upper mounting member 70 may be sandwiched and connected only by the adjustment members 62, 72, without including the connection portions. Furthermore, the end edge of the lateral flexible joint 24 is clamped into the lower mounting member 60 and the upper mounting member 70, and is attached at the same time as being connected. This allows the length of the lower mounting member 60 and the upper mounting member 70 to be adjusted without fusing, and connection can be performed by tightening the clamping members 63, 73 and the tightening bolts 63c, 73c without welding. The end edge of the lateral flexible joint 24 can also be attached.

[0027] Clamping member Additionally, for each of the lower mounting member 60 and the upper mounting member 70, the horizontal ends of the angle bars with L-shaped cross sections are removed, and the vertical sections are overlapped to form a connecting section. The overlap can be adjusted to allow the connecting section to function as both a connecting section and an adjusting section. This allows for the absorption of construction errors and connection without using adjustment members 62 and 72. The clamping member 68, which serves as both a connecting section and an adjusting member, is, for example, as shown in Figures 11 and 12, welded to the outside of one of two side plates 68a with a U-shaped cross section, with six nuts 68b welded to the outside, and a tightening bolt 68c inserted through each. The connecting sections of the lower mounting member 60 and the upper mounting member 70 and the edge of the lateral flexible joint 24 are sandwiched between the two side plates 68a, and the clamping bolts 68c are used to clamp the connecting sections and the lateral flexible joint 24 between the two side plates 68a, using a presser plate to clamp them with the tips of the tightening bolts 68c. Alternatively, the lower mounting member 60 and the upper mounting member 70 are connected by being sandwiched only by the sandwiching member 68, without including the connecting portion. Notches are formed in both ends of the other of the two side plates 68a of the sandwiching member 68, so that the horizontal flexible joint 24 can be sandwiched and attached to the lower mounting member 60 and the upper mounting member 70 using anchor bolts 68d. In this way, the sandwiching member 68 can be reliably fixed by being embedded in the sheet pile-covered concrete 67 (see Figures 1 and 14).

[0028] (4-2) Adjusting the position of the lower mounting part The lower mounting member 60 is supported and fixed to the lower sheet pile wall 10 using bolts and nuts rather than welding as in the past, and a position adjustment member 65 is used. As shown in Figures 10 and 12, the position adjustment member 65 has a U-shaped fixing portion 65a that fits from above onto the top 12 of the steel sheet pile 11 of the lower sheet pile wall 10. The steel sheet pile 11 is clamped and fixed with a bolt 65c that passes through a fixing nut 65b on the outside of the fixing portion 65a. A vertically extending height nut 65d is welded to the fixing portion 65a on the opposite side from the fixing nut 65b, and a vertical adjustment bolt 65e is inserted from below. The horizontal portion of an L-shaped fixing plate 65f is attached to the top of the vertical adjustment bolt 65e by being sandwiched between nuts 65g, adjusting and fixing the vertical position. Two fixing bolts and nuts 65h are inserted horizontally into the vertical portion of the fixing plate 65f. Meanwhile, a position adjustment plate 65i, which has a long hole formed therein and faces the vertical portion of the fixing plate 65f, is welded to the lower mounting member 60. This allows the height direction to be adjusted by adjusting the position where the position adjustment plate 65i on the lower mounting member 60 is fixed with two nuts 65g. The position adjustment plate 65i is placed on the fixing plate 65f and two fixing bolts and nuts 65h are inserted into the long holes and tightened to adjust the left-right position and fix it in place.

[0029] The base end fixing portion 65a of this position adjustment member 65 is supported and fixed to the top 12 of the steel sheet pile 11 of the lower sheet pile wall 10. This makes it possible to adjust the position adjustment member 65 in the height direction and the left and right direction. A plurality of these position adjustment members 65 are provided to support and fix the lower mounting member 60, and are buried in the sheet pile-wrapped concrete 67 without being removed (see Figures 10, 12, and 14).

[0030] (4-3) Installation of the upper mounting member The upper mounting member 70 is installed parallel to the lower mounting member 60, with its position adjusted via the lower mounting member 60. Support members 75 are used for the upper mounting member 70, maintaining a gap between them and the lower mounting member 60 (see Figures 7 and 8). The support members 75 have end plates 75b welded to both ends of the angle iron support section 75a, with bolt holes formed in the end plates 75b and nuts 75c fixed to the inside. The horizontal surfaces 60b, 70b of the lower mounting member 60 and the upper mounting member 70 are placed against the end plates 75b of the support member 75, and bolts are inserted from the top and bottom outside and tightened to the nuts 75c, with the support members 75 arranged at regular intervals in a ladder-like fashion. The support member 75 is eventually removed, but this can be done by loosening the bolts without the need for fusing or the like.

[0031] (4-4) Installation and joining of horizontal flexible joints To install the horizontal flexible joint 24, unfold the horizontal flexible joint 24 that was wrapped around the flexible sheet pile 20, and then move toward the center, as shown in Figures 12 and 13, by passing the anchor bolts 66, 76 through the lower mounting member 60 and the upper mounting member 70, and temporarily fastening the horizontal flexible joint 24, pressure plates 66a, 76a, washers 66b, 76b, and nuts 66c, 76c.

[0032] The connection between the central parts of the horizontal flexible joints 24 is achieved by forming thin-walled molded parts 24b in advance with an adjustment margin in the length direction so that they interlock vertically at the center, as shown in Figure 13, and then cutting them to fit on site. Adhesive is applied to the joints of the thin-walled molded parts 24b of the horizontal flexible joints 24 to bond them together, and a rubber sheet 24c is attached to wrap around the outside of the joint. For the joints, no hole drilling is performed on-site, and clamping members 63, 73 similar to those used for the connecting parts of the lower mounting member 60 and the upper mounting member 70 are used to clamp and tighten, thereby ensuring the surface pressure required for watertightness. To ensure the surface pressure, the strength of the side plates 63a, 73a of the clamping members is increased and the number of tightening bolts 63c, 73c is adjusted as appropriate. After the horizontal flexible joint 24 has been installed and joined in this manner, the nuts 66c, 76c of the anchor bolts 66, 76 are finally tightened. This eliminates the need for a dedicated jig for drilling holes in the horizontal flexible joint 24, and reduces the number of steps, thereby shortening the time required for installation.

[0033] (5) Pouring sheet pile-wrapped concrete After the installation of the horizontal flexible joint 24 is completed, concrete is poured between the top 12 of the lower sheet pile wall 10 and the lower mounting member 60, as shown in Figures 1 and 14, and the position adjustment member 65 is buried to form sheet pile-wrapped concrete 67. After the sheet pile concrete 67 has cured, the surrounding area is backfilled up to the surface of the sheet pile concrete 67.

[0034] (6) Installing cushioning material To protect the lateral flexible joint 24 and ensure space for displacement, block-shaped cushioning materials 80 are installed in front of and behind the lateral flexible joint 24 (see Figure 14). When installing the cushioning materials 80, the bolts that secure the support members 75 that support the upper mounting member 70 are removed, releasing the constraint on the lateral flexible joint 24 and allowing it to displace. When installing the cushion material 80, measures are taken to seal the gaps so that concrete does not flow in when the main body of the sluice gate section B and the foundation concrete are poured in the subsequent process. The anchor bolts 76 of the upper mounting members 70 of the horizontal flexible joints 24 are embedded in the concrete of the main body.

[0035] Through the steps described above, it is possible to construct the flexible sheet pile wall 1 of the sluice gate portion B. The sluice gate portion B is constructed on the flexible sheet pile wall 1 constructed through these steps. The construction of the culvert section B is carried out after the foundation concrete has been poured, using the same process as before to construct the culvert section B on top of the foundation concrete. Before the construction of the culvert section B, the necessary reinforcing and protective members 30 and supporting members 75 are removed, and the excavated area is backfilled. Here, we will omit the explanation of the construction of the culvert section B, which will be carried out in the same manner as before.

[0036] As described above in conjunction with the embodiment, the method for constructing the flexible sheet pile wall 1 of the sluice gate section B has been specifically described. In the present invention, when constructing the flexible sheet pile wall 1 provided with the vertical flexible joints 23 and the horizontal flexible joints 24 in the up-down and left-right directions at the sluice gate section B crossing the river levee A, the first step is to cast the lower sheet pile wall 10 below where the horizontal flexible joints 24 in the left-right direction are arranged, and the second step is to cast the lower sheet pile wall 10 below where the horizontal flexible joints 24 in the left-right direction are connected to the intermediate parts of the vertical vertical flexible joints 23. The method comprises a second step of fitting and connecting the wound flexible sheet piles 20 to both sides of the lower sheet pile wall 10 and casting them, and a third step of casting the upper sheet pile wall 50 with a mounting width for the horizontal flexible joints 24 in the left-right direction. In the second step, a reinforcing member 30 is provided at the part of the middle part of the flexible sheet pile 20 where the horizontal flexible joints 24 in the left-right direction are connected, which is detachably attached by a tightening member 33 to ensure rigidity during casting and is removed after casting. According to this configuration, the portion of the flexible sheet pile 20 where the horizontal flexible joints 24 in the left and right directions are provided can be reinforced with the reinforcing members 30 that are attached and detached with the fastening members 33, eliminating the need for reinforcement or removal by welding or fusing as in the past. This makes it possible to construct the flexible sheet pile wall 1 of the sluice gate portion B without the need for on-site welding or fusing.

[0037] The present invention relates to a method for constructing a flexible sheet pile wall 1 provided with vertical flexible joints 23 and horizontal flexible joints 24 in the up-down and left-right directions at a sluice gate section B crossing a river levee A, and includes a first step of casting a lower sheet pile wall 10 below the horizontal flexible joints 24 in the left-right direction, and a second step of casting a wound flexible sheet pile 20, which has horizontal flexible joints 24 in the left-right direction connected to the intermediate part of the vertical vertical flexible joint 23, on both sides of the lower sheet pile wall 10. The method comprises steps 2 and 3 of casting the upper sheet pile wall 50 with a mounting width for the horizontal flexible joints 24 in the left-right direction, and in the third step, the fitting connection portion 28 of the flexible sheet pile 20 to which the upper steel sheet pile 51 is fitted and connected and the fitting connection portion 52 of the adjacent upper steel sheet pile 51 to which the upper steel sheet pile 51 is fitted and connected are formed with positioning portions 29, 53 which position the lower end position of the connected upper steel sheet pile 51 and are cast in place. According to this configuration, by dividing the steel sheet piles 11 of the lower sheet pile wall 10 and the upper steel sheet piles 51 of the upper sheet pile wall 50 and driving them separately, there is no need to ensure the installation width of the horizontal flexible joints 24 by fusing after driving a single steel sheet pile, and the flexible sheet pile wall 1 of the sluice gate section B can be constructed without on-site welding or fusing. In addition, by forming positioning portions 29, 53 in the fitting connection portion 28 of the flexible sheet pile 20 and the fitting connection portion 52 of the upper steel sheet pile 51, the upper steel sheet pile 51 can be constructed in a predetermined position. This allows the flexible sheet pile wall 1 of the sluice gate section B to be constructed without on-site welding or fusing.

[0038] The present invention relates to a method for constructing a flexible sheet pile wall 1 provided with vertical flexible joints 23 and horizontal flexible joints 24 in the up-down and left-right directions at a sluice gate section B crossing a river levee A, the method comprising the steps of: a first step of casting a lower sheet pile wall 10 below the horizontal flexible joints 24 in the left-right direction; a second step of casting a wound flexible sheet pile 20, which is connected to the intermediate part of the vertical vertical flexible joint 23 and has horizontal flexible joints 24 in the left-right direction, on both sides of the lower sheet pile wall 10; and a third step of casting the upper sheet pile wall 50 with an installation width for the horizontal flexible joint 24. After the third step, a lower installation member 60 is provided above the lower sheet pile wall 10 to install the lower edge of the horizontal flexible joint 24 in the left-right direction via a position adjustment member 65 that can adjust the position up and down and left and right, and the central connecting portion is connected via a clamping member 63 that is tightened with a tightening bolt 63c to construct the structure. According to this configuration, the position of the lower mounting member 60 can be adjusted and installed using the position adjustment member 65, and the central connecting portion can be fastened and connected using the clamping member 63, which is tightened with the tightening bolt 63c. As a result, the lower mounting member 60 can be installed at a predetermined position relative to the lower sheet pile wall 10 via the position adjustment member 65 without welding, and the central connecting portion of the lower mounting member 60 can also be connected to the clamping member 63 with the tightening bolt 63c without welding.

[0039] The present invention is configured to include a fifth step after the fourth step in which a support member (spacing member) 75 is detachably attached to an upper mounting member 70 above the lower mounting member 60, which attaches the upper edge portion of the left-right lateral flexible joint 24, using a fastening member, and the central connecting portion is connected via a clamping member 73 which is tightened by a tightening bolt 73c, which is a fastening member, to construct the structure. According to this configuration, the upper mounting member 70 can be installed using the support member 75, and the central connecting portion can be fastened and connected using the clamping member 73, which is tightened with the tightening bolt 73c. ​​As a result, the upper mounting member 70 can be installed at a predetermined position relative to the lower sheet pile wall 10 via the support member 75 without welding, and the central connecting portion of the upper mounting member 70 can also be connected to the clamping member 73 with the tightening bolt 73c without welding.

[0040] In the present invention, the lower mounting member 60 and the upper mounting member 70 are constructed and connected via adjustment members 62, 72 whose lengths are adjusted in the center. According to this configuration, the length can be adjusted and installed by using the adjustment members 62, 72 without fusing or welding the lower mounting member 60 and the upper mounting member 70. This makes it possible to construct the flexible sheet pile wall 1 of the sluice gate section B without the need for welding or fusing on site.

[0041] The present invention relates to a method for constructing a flexible sheet pile wall 1 provided with vertical flexible joints 23 and horizontal flexible joints 24 in the up-down and left-right directions at a sluice gate section B crossing a river levee A, and includes a first step of casting a lower sheet pile wall 10 below where the horizontal flexible joints 24 in the left-right direction are arranged, a second step of fitting and connecting flexible sheet piles 20 wound around the vertical vertical flexible joints 23 and the horizontal flexible joints 24 in the left-right direction to the intermediate portions of the vertical vertical flexible joints 23, and casting the flexible sheet piles 20 on both sides of the lower sheet pile wall 10, and a second step of installing the horizontal flexible joints 24 in the left-right direction. and a third step of casting the upper sheet pile wall 50 with a mounting width therebetween. The horizontal flexible joints 24 in the left-right direction are unwound from both sides and attached to the upper and lower mounting members 60, 70 with their edge portions facing the center, and the central edge portions 24a are overlapped and attached to form thin-walled molded portions 24b, and are attached to the upper and lower mounting members 60, 70 with clamping members 63 tightened by tightening bolts 63c. According to this configuration, the central edge portions 24a of the horizontal flexible joints 24 are joined together by bonding via the thin-walled molded portions 24b, and are clamped by the clamping members 63 and tightened with the tightening bolts 63c, so that the horizontal flexible joints 24 can be connected with the tightening bolts 63c, which are fastening members such as bolts and nuts, and the horizontal flexible joints 24 can be joined and connected without the need for bolt hole processing. This makes it possible to construct the flexible sheet pile wall 1 of the sluice gate section B without the need for on-site welding or cutting.

[0042] In the above embodiment, the configuration and effects of each invention of the present application have been explained, but the present invention is not limited to this, and each invention can be configured alone, and each process can be configured by combining each invention in any desired manner, and with any combination, a flexible sheet pile wall 1 of the sluice gate section B can be constructed without the need for on-site welding or cutting in each process. In addition, the chucking required for driving the flexible sheet pile can be added as a preparatory step before the first step, or the preparatory step can be configured as a separate step. The present invention is not limited to the above-described embodiments, and modifications may be made without departing from the spirit of the invention. For example, the fastening members are not limited to bolts and nuts, but may be other configurations such as engaging hooks and engaging holes, as long as they can secure the required tightening force and can be fastened. [Explanation of symbols]

[0043] 1 Flexible sheet pile wall A River embankment B Gutter section C Central flat area D Inclined surface E Floor surface 10 Lower sheet pile wall 11 Steel sheet piles 12 Top 20 Flexible sheet pile 21 Steel sheet pile 22 Web Department 23 Vertical flexible joint (vertical flexible joint) 24 Lateral flexible joint (flexible joint in the left and right direction) 24a Center edge 24b Thin molded part 24c rubber sheet 25 flange 26 Notch 27 Arm section 28 Connection part (fitting connection part) 29 Positioning part 30 Reinforcement member 31 Fixed part 31a horizontal board 31b vertical board 31c reinforcement plate 32 Reinforcement 32a Fixed plate 32b vertical board 32c reinforcement plate 33 Fastening member 33a Bolt 33b Nut 35 Fixing member 35a vertical plane 35b Nut 36 Left and right connecting member 36a Fastening bolt 37 Fixing member 37a Horizontal section 37b Nut 38 Chucking member 38a Fastening bolt 38b vertical board 38c horizontal board 40 Protective material 41 Protective plate 42 Connecting piece 50 Upper sheet pile wall 51 Upper steel sheet pile 52 Connection part (fitting connection part) 53 Positioning part 60 Lower mounting member 60a vertical surface 60b horizontal plane 61 Mounting bracket 61a Nut 62 Adjustment member 63 Clamping member 63a side plate 63b Nut 63c Tightening bolt 65 Position adjustment member 65a Fixed part 65b Fixing nut 65c bolts 65d high nut 65e Up / down adjustment bolt 65f Fixed plate 65g nuts 65h Fixing bolts and nuts 65i position adjustment plate 66 Anchor bolt 66a Presser plate 66b Washer 66c nut 67 Sheet-covered concrete 68 Clamping member 68a side plate 68b Nut 68c tightening bolt 68d anchor bolt 70 Upper mounting member 70a vertical plane 70b horizontal plane 71 Mounting bracket 71a Nut 72 Adjustment member 73 Clamping member 73a side plate 73b Nut 73c Tightening bolt 75 Support member 75a Support part 75b end plate 75c nut 76 Anchor bolt 76a Presser plate 76b Washer 76c nut 80 cushioning material

Claims

1. When constructing a flexible sheet pile wall with flexible joints in the vertical and horizontal directions at a sluice gate crossing a river levee, A first step of placing a lower sheet pile wall below the flexible joint in the left-right direction; A second step of driving a flexible sheet pile, in which the flexible joint in the left-right direction is connected to the intermediate portion of the flexible joint in the up-down direction, into both sides of the lower sheet pile wall by fitting and connecting them; and a third step of placing an upper sheet pile wall with a mounting width of the flexible joint in the left-right direction, In the second step, a reinforcing member is provided that is detachably attached by a fastening member to the portion of the intermediate portion of the flexible sheet pile where the flexible joint is connected in the left-right direction, to ensure rigidity during casting and to be removed after casting. A method for constructing a flexible sheet pile wall at a sluice gate.

2. When constructing a flexible sheet pile wall with flexible joints in the vertical and horizontal directions at a sluice gate crossing a river levee, A first step of placing a lower sheet pile wall below the flexible joint in the left-right direction; A second step of driving a flexible sheet pile, in which the flexible joint in the left-right direction is connected to the intermediate portion of the flexible joint in the up-down direction, into both sides of the lower sheet pile wall by fitting and connecting them; and a third step of placing an upper sheet pile wall with a mounting width of the flexible joint in the left-right direction, In the third step, a positioning portion for positioning the lower end position of the upper sheet pile to be connected is formed in the fitting connection portion of the flexible sheet pile to which the upper sheet pile is fitted and connected and the fitting connection portion of the adjacent upper sheet pile to be fitted and connected, and then the positioning portion is driven in. A method for constructing a flexible sheet pile wall at a sluice gate.

3. When constructing a flexible sheet pile wall with flexible joints in the vertical and horizontal directions at a sluice gate crossing a river levee, A first step of placing a lower sheet pile wall below the flexible joint in the left-right direction; A second step of driving a flexible sheet pile, in which the flexible joint in the left-right direction is connected to the intermediate portion of the flexible joint in the up-down direction, into both sides of the lower sheet pile wall by fitting and connecting them; and a third step of placing an upper sheet pile wall with a mounting width of the flexible joint in the left-right direction, After the third step, a fourth step is provided in which a lower mounting member is provided above the lower sheet pile wall to mount the lower edge portion of the flexible joint in the left-right direction via a position adjustment member that can adjust the position up, down, left, and right, and the central connecting portion is connected via a clamping member that is tightened by a fastening member. A method for constructing a flexible sheet pile wall at a sluice gate.

4. After the fourth step, a fifth step is provided in which a spacing member is detachably attached to an upper mounting member above the lower mounting member by a fastening member, the upper mounting member being used to attach the upper edge portion of the flexible joint in the left-right direction, and the central connecting portion is connected to the upper mounting member via the clamping member which is fastened by the fastening member. A method for constructing a flexible sheet pile wall at a sluice gate section according to claim 3.

5. The lower mounting member and the upper mounting member are connected to each other via an adjustment member whose length is adjusted in the center. A method for constructing a flexible sheet pile wall of a sluice gate section according to claim 4.

6. When constructing a flexible sheet pile wall with flexible joints in the vertical and horizontal directions at a sluice gate crossing a river levee, A first step of placing a lower sheet pile wall below the flexible joint in the left-right direction; A second step of driving a flexible sheet pile, in which the flexible joint in the left-right direction is connected to the intermediate portion of the flexible joint in the up-down direction, into both sides of the lower sheet pile wall by fitting and connecting them; and a third step of placing an upper sheet pile wall with a mounting width of the flexible joint in the left-right direction, The flexible joints in the left and right directions are unwound from both sides and attached to the upper and lower attachment members with their respective edge portions facing the center, and the center edge portions are overlapped and attached to each other by forming thin-walled molded portions, and are then attached to the attachment members with clamping members that are tightened by fastening members. A method for constructing a flexible sheet pile wall at a sluice gate.

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