Construction method of runoff prevention fence and temporary fixing device for runoff prevention fence posts

Abstract

To provide a construction method of an outflow preventing fence allowing easy adjustment of a height of each column so that a beam connecting adjacent columns takes an attitude of horizontal extension at a set height, after once setting multiple columns to a quay wall of a port at a predetermined interval.SOLUTION: A construction method of an outflow preventing fence 1 includes: a column temporary fixing step of temporarily fixing multiple columns 4 inserted with each base 16a inside multiple steel pipe piles 2 to the multiple steel pipe piles 2 by multiple column temporary fixing tools 8 in a vertically extended attitude, wherein the multiple columns 4 are fixed to the multiple steel pipe piles 2 in a form in which the temporal fixing of the multiple columns 4 to each of the multiple steel pipe piles 2 is releasable; and a column height position adjusting step of releasing the temporary fixing of the multiple columns 4 by the multiple column temporary fixing tools 8, and adjusting a height position of each of the multiple columns 4 to a height position where an attitude of a beam 6 for connecting the adjacent columns 4 is an attitude of horizontally extending at a set height position.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a construction method for an anti-flow fence that prevents drifting debris swept away by waves from the quayside of a port from being washed out to sea, and to a temporary post fixing device used to temporarily fix the posts of the anti-flow fence in the construction method. [Background technology]

[0002] When a high tide or tsunami occurs, containers, vehicles, etc. placed on the quays of a port may be swept away and drifted away by waves that surge over the quays of the port. For this reason, outflow prevention fences are installed on the quays of the port to capture such drifting objects and prevent them from drifting out to sea. The following Patent Document 1 discloses a tsunami barrier as an example of such an outflow prevention fence.

[0003] The tsunami barrier disclosed in Patent Document 1 below comprises a plurality of support structures installed on the ground in a line at predetermined intervals, and a screen stretched between adjacent support structures.

[0004] Each pillar structure has a pile-type foundation structure buried in the ground, a pillar base portion fixed to the foundation structure, and a pillar main body portion fixed to the pillar base portion and extending upward from the ground.

[0005] The foundation structure includes a steel tubular member embedded in the ground in a vertically extending position, and a fill material filled inside the tubular member. The fill material includes mortar filled in an inner space near an upper end of the tubular member.

[0006] The column foundation has a tubular member inserted inside the tubular member of the foundation in a vertically extending position and fixed with the mortar, and a connecting member joined to an upper end of the tubular member of the column foundation and positioned above the upper end of the tubular member of the foundation. The connecting member of the column foundation has a flange portion that protrudes outward from the outer edge of the upper end of the tubular member of the column foundation around its entire circumference.

[0007] The pillar body has a tubular member extending in the vertical direction and a connecting member joined to the lower end of the tubular member. The connecting member of the pillar body has a flange portion protruding outward from the outer edge of the lower end of the pillar body over its entire circumference. This flange portion is fastened to the flange portion of the connecting member of the pillar base with bolts and nuts while being overlapped on the flange portion of the connecting member of the pillar base, whereby the pillar body is fixed to the pillar base and erected. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 6785089 Summary of the Invention [Problem to be solved by the invention]

[0009] In order to ensure that driftwood that collide with the fence between its posts does not climb over it, a fence that prevents driftwood from escaping from a port quay requires that the beams connecting adjacent posts extend horizontally at a set height that is preset based on the expected maximum flood depth in the port where the fence is installed.

[0010] However, since the quays of ports are generally undulating, the height positions of the multiple pillars erected by fixing the bases of the multiple pillars to the multiple steel pipe piles embedded in the quays at a predetermined interval are reflected in the undulations, and some of the multiple pillars may be erected at a height position that is different from the height position required to place the beam at the set height position, or the height positions of the pillars may not be uniform, resulting in the height position of the beam being deviated from the set height position, or the posture of the beam being deviated from the horizontal and tilted. Therefore, it is desirable to be able to adjust the height positions of the pillars so that the beams connected between the pillars are horizontally extended at the set height position after the multiple pillars are erected, but when a fixing structure of the pillar body by a foundation structure and a pillar base part such as the pillar structure of the tsunami barrier disclosed in Patent Document 1 is adopted, it is difficult to adjust the height position of each pillar once erected.

[0011] The object of the present invention is to provide a construction method for an anti-flow fence that enables a plurality of posts to be erected at a predetermined interval on a port quay, and then the height position of each post can be easily adjusted so that the beams connecting adjacent posts extend horizontally at a set height, and a temporary post fixing device for use in said construction method. [Means for solving the problem]

[0012] The construction method of an outflow prevention fence provided by the present invention is a method of constructing an outflow prevention fence on a quay of a harbor to prevent drifting objects from being outflowed into the sea from the quay of the harbor. This outflow prevention fence construction method includes a steel pipe pile embedding step of embedding a plurality of steel pipe piles at a predetermined interval into the ground of the quay, a post inserting step of inserting the bases of a plurality of posts into the inside of the plurality of steel pipe piles embedded in the ground of the quay, and a post temporary fixing step of temporarily fixing the plurality of posts, the bases of which are inserted into the inside of the plurality of steel pipe piles, to each of the plurality of steel pipe piles in a vertically extending position by a plurality of post temporary fixing devices corresponding to the plurality of posts, the temporary fixing of the plurality of posts in this step being in a form in which the fixation of the plurality of posts to each of the plurality of steel pipe piles can be released, and The method includes a beam connecting process for connecting adjacent pillars among the multiple pillars that are temporarily fixed to the multiple steel pipe piles with a beam placed between them; a pillar height position adjustment process for releasing the temporary fixation of the multiple pillars by the multiple pillar temporary fixators and adjusting the height position of each of the multiple pillars to a height position where the attitude of the beam connecting the adjacent pillars extends horizontally at a preset set height position; and a pillar permanent fixing process for pouring concrete inside the multiple steel pipe piles respectively after the pillar height position adjustment process and fixing the bases of the multiple pillars to the corresponding ones of the multiple steel pipe piles into which they were inserted with the concrete.

[0013] In this construction method for preventing leakage, multiple posts are temporarily fixed to multiple steel pipe piles buried at predetermined intervals in the ground of the port quay with corresponding ones of the multiple temporary post fasteners, so that the multiple posts are erected at predetermined intervals, and then the height position of each post can be adjusted by the simple task of releasing the temporary fixation of the multiple posts by the multiple temporary post fasteners.Therefore, after erecting multiple posts at predetermined intervals on the port quay, the height position of each post can be easily adjusted so that the beams connecting adjacent posts extend horizontally at the set height.

[0014] The construction method of the runoff prevention fence further includes a support post temporary fixing device preparation step of preparing a plurality of support post temporary fixing devices, each of which has, as the plurality of support post temporary fixing devices, a first temporary fixing device and a second temporary fixing device arranged separately on both sides of the support post in a direction perpendicular to the axial direction of the support post, a clamping fastening member capable of fastening the first temporary fixing device and the second temporary fixing device so as to sandwich the support post arranged between the first temporary fixing device and the second temporary fixing device, a first fastening fastening member that fastens the first temporary fixing device to the steel pipe pile, and a second fastening fastening member that fastens the second temporary fixing device to the steel pipe pile, and in the support post temporary fixing step, the first temporary fixing device and the second temporary fixing device are fastened by the clamping fastening member so as to sandwich each of the plurality of supports between the first temporary fixing device and the second temporary fixing device from both sides in a direction perpendicular to the axial direction of the support post, thereby fixing the support post temporary fixing device to each of the plurality of supports, It is preferable that the first temporary fixing device is fastened to the steel pipe pile by the first fastening member in a manner that restricts displacement of the first temporary fixing device in a vertical direction while allowing displacement of the first temporary fixing device in a direction toward and away from the fixing device, and further that the second temporary fixing device is fastened to the steel pipe pile by the second fastening member in a manner that restricts displacement of the second temporary fixing device in a vertical direction while allowing displacement of the second temporary fixing device in a direction toward and away from the first temporary fixing device, and that in the pillar height position adjustment step, fastening of the first temporary fixing device and the second temporary fixing device by the clamping fastening member is loosened to displace the first temporary fixing device and the second temporary fixing device in directions away from each other, thereby releasing the temporary fixing of the pillar, and then the height position of the pillar is adjusted to a height position where the attitude of the beam extends horizontally at the set height position, and then the height position of the pillar is fixed by re-fastening the first temporary fixing device and the second temporary fixing device by the clamping fastening member.

[0015] In this way, in the pillar height position adjustment process, the temporary fixation of the pillar to the steel pipe pile can be released and the height position of the pillar can be adjusted by simply loosening the fastening of the first and second temporary fixing devices of the pillar temporary fixing device using the clamping fastening member and displacing the first and second temporary fixing devices in directions away from each other.

[0016] In the pillar temporary fixing process, it is preferable that the pillar temporary fixing device is fixed to the base of the pillar and the base of the pillar is temporarily fixed to the steel pipe pile with the pillar temporary fixing device housed inside the steel pipe pile, and in the pillar final fixing process, the base of the pillar and the pillar temporary fixing device fixed to the base are embedded in the concrete.

[0017] In this way, the base of the support pillar is permanently fixed to the steel pipe pile by the temporary support fixture in addition to the concrete, so that the base of the support pillar can be fixed to the steel pipe pile more firmly. Moreover, in this case, the temporary support fixture is covered by concrete while being housed inside the steel pipe pile, so that the temporary support fixture can be prevented from coming into contact with seawater and causing corrosion of the temporary support fixture.

[0018] The present invention also provides a temporary post fixing device for an outflow prevention fence, which is used to temporarily fix the post to the steel pipe pile in the outflow prevention fence construction method. This pillar temporary fixing device comprises a first temporary fixing device and a second temporary fixing device arranged separately on either side of the pillar in a direction perpendicular to the axial direction of the pillar, a clamping fastening member capable of fastening the first temporary fixing device and the second temporary fixing device so that the first temporary fixing device and the second temporary fixing device sandwich the pillar arranged between them, a first fixing fastening member capable of fastening the first temporary fixing device to the steel pipe pile in a manner that allows displacement of the first temporary fixing device in a direction toward and away from the second temporary fixing device while restricting displacement of the first temporary fixing device in a vertical direction, and a second fixing fastening member capable of fastening the second temporary fixing device to the steel pipe pile in a manner that allows displacement of the second temporary fixing device in a direction toward and away from the first temporary fixing device while restricting displacement of the second temporary fixing device in a vertical direction.

[0019] With this temporary post fixing device, in the post height position adjustment process of the construction method for the escape prevention fence, the temporary fixation of the post can be released and the height position of the post can be adjusted by the simple task of loosening the fastening of the first temporary fixing device and the second temporary fixing device by the clamping fastening member and displacing the first temporary fixing device and the second temporary fixing device in directions away from each other.

[0020] The first temporary fastener includes a first temporary fastener fitting portion that can be fitted to the support from one side in a direction perpendicular to the axial direction of the support, a first temporary fastener one-end fastened portion that protrudes from one end of the first temporary fastener fitting portion in a direction perpendicular to both the direction along the axial direction of the support and the fitting direction of the first temporary fastener fitting portion with respect to the support and is fastened to the second fastener by the clamping fastening member, and a first temporary fastener one-end fastened portion that protrudes from an end of the first temporary fastener fitting portion opposite to the first temporary fastener one-end fastened portion and fastens the second temporary fastener to the first temporary fastener one-end fastened portion by the clamping fastening member. and a first temporary fixing device fixed portion extending from the first temporary fixing device one end side fastened portion and configured to be fastened to the steel pipe pile by the first fastening member, and the second temporary fixing device has a second temporary fixing device fitting portion that can be fitted to the support from the opposite side to the first temporary fixing device fitting portion, and a second temporary fixing device protruding from one end of the second temporary fixing device fitting portion in a direction perpendicular to both a direction along the axial direction of the support and a fitting direction of the second temporary fixing device fitting portion with respect to the support, a second temporary fixing device one-end side fastened portion that is disposed so as to face the other-end side fastened portion and is fastened to the first temporary fixing device other-end side fastened portion by the clamping fastening member; a second temporary fixing device other-end side fastened portion that protrudes from an end of the second temporary fixing device fitting portion opposite the second temporary fixing device one-end side fastened portion and is disposed so as to face the first temporary fixing device one-end side fastened portion and is fastened to the first temporary fixing device one-end side fastened portion by the clamping fastening member; and a second temporary fixing device other-end side fastened portion that extends from the second temporary fixing device one-end side fastened portion and is fastened to the steel pipe pile by the second fixing fastening member. and a second temporary fastener fixed portion configured to be capable of being fastened to the support, the first temporary fastener fixed portion having a first fixed portion through hole which passes through the first temporary fastener fixed portion and has a through hole along the axial direction of the support when the first temporary fastener fitting portion is fitted to the support, the second temporary fastener fixed portion having a second fixed portion through hole which passes through the second temporary fastener fixed portion and has a through hole along the axial direction of the support when the second temporary fastener fitting portion is fitted to the support, and the first fastening memberIt is preferable that the second fastening member has a first fixing bolt that is inserted into the first fixed part through hole in a position extending in a direction along the axial direction of the support to fasten the first temporary fastener fixed part to the steel pipe pile, and the second fastening member has a second fixing bolt that is inserted into the second fixed part through hole in a position extending in a direction along the axial direction of the support to fasten the second temporary fastener fixed part to the steel pipe pile.

[0021] According to this configuration, by loosening the fastening between the one end fastened portion of the first temporary fastener and the other end fastened portion of the second temporary fastener by the clamping fastening member, and between the other end fastened portion of the first temporary fastener and the one end fastened portion of the second temporary fastener, the first temporary fastener arranged on one side of the pillar in a direction perpendicular to the axial direction of the pillar is rotated about the first fixing bolt, and the second temporary fastener arranged on the opposite side of the pillar to the first temporary fastener is rotated about the second fixing bolt, thereby realizing a structure in which the first temporary fastener and the second temporary fastener can be displaced in directions toward or away from each other.

[0022] It is preferable that the first temporary fixing device has a first temporary fixing device opposing surface which is a surface facing the outer circumferential surface of the support when the first temporary fixing device and the second temporary fixing device sandwich the support, and a first temporary fixing device pressing protrusion which protrudes from the first temporary fixing device opposing surface and is pressed against the outer circumferential surface of the support when the first temporary fixing device and the second temporary fixing device sandwich the support, and the second temporary fixing device has a second temporary fixing device opposing surface which is a surface facing the outer circumferential surface of the support when the first temporary fixing device and the second temporary fixing device sandwich the support, and a second temporary fixing device pressing protrusion which protrudes from the second temporary fixing device opposing surface and is pressed against the outer circumferential surface of the support when the second temporary fixing device and the first temporary fixing device sandwich the support.

[0023] According to this configuration, when the support pole temporary fixing device is fixed to the support pole by sandwiching the support pole between the first temporary fixing device and the second temporary fixing device, the first temporary fixing device pressing protrusions and the second temporary fixing device pressing protrusions are pressed against the outer circumferential surface of the support pole with a high pressing force concentrated thereon, so that the support pole temporary fixing device can be fixed more firmly to the support pole. Effect of the Invention

[0024] As described above, according to the present invention, it is possible to provide a construction method for an anti-flow fence that enables multiple pillars to be erected at a predetermined interval on a port quay, and then the height position of each pillar can be easily adjusted so that the beams connecting adjacent pillars extend horizontally at a set height, as well as a temporary pillar fixing device used in the construction method. [Brief description of the drawings]

[0025] [Figure 1] A front view of an outflow prevention fence constructed using a construction method according to one embodiment of the present invention. [Diagram 2] This figure shows a steel pipe pile of an escape prevention fence according to one embodiment of the present invention, a support post with its base inserted into the steel pipe pile, and a temporary support post fixing device that temporarily fixes the base of the support post to the steel pipe pile, with the upper part of the pile body partially broken away. [Diagram 3] 3 is a view of the steel pipe pile, the support pillar, and the support pillar temporary fixing device shown in FIG. 2 with the upper part of the pile body partially broken away, as viewed from the right side of FIG. 2. [Figure 4] FIG. 3 is a cross-sectional view taken along line IV-IV in FIG. [Diagram 5] This is a diagram showing a steel pipe pile of an outflow prevention fence according to one embodiment of the present invention, with the upper part of the pile body partially broken. [Figure 6] This is a view from above of a steel pipe pile of an outflow prevention fence according to one embodiment of the present invention, along its axial direction. [Figure 7] 5 is a cross-sectional view corresponding to FIG. 4 showing a support and a temporary support fixture fixed thereto. FIG. [Figure 8] FIG. 2 is a diagram showing a support and a temporary support fixture fixed to the support in an exploded state. [Figure 9] 9 is a view of a first temporary fixing device of the support temporary fixing device as viewed from the direction of arrow IX in FIG. 8. [Figure 10] FIG. 2 is a front view of a support column according to one embodiment of the present invention. [Figure 11]1 is a diagram for explaining a method of constructing an outflow prevention fence according to one embodiment of the present invention, showing the state in which a temporary post fixing device has been attached to the base of the post. [Figure 12] 12 is a view of the base of the support pillar and the temporary support pillar fixing device shown in FIG. 11 as viewed from the left in FIG. 11. [Figure 13] 5 is a cross-sectional view corresponding to FIG. 4 showing the state in which the temporary fixation of the post by the temporary post fixation device has been released in the post height position adjustment process in the construction method for an outflow prevention fence according to one embodiment of the present invention. [Figure 14] 3 is a diagram showing the support column height position adjusting step in a state corresponding to FIG. 2. FIG. [Figure 15] This shows a temporary post fixing device before it is attached to the receiving portion of a steel pipe pile in a construction method for an outflow prevention fence according to one modified example of the present invention. [Figure 16] This figure shows the state in which a temporary support fixing device is placed inside the pile body of a steel pipe pile and fixed to the receiving part of the steel pipe pile in the construction method of the runoff prevention fence according to the one modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0026] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0027] A construction method for an outflow prevention fence (see FIG. 1 ) according to one embodiment of the present invention is a method for constructing an outflow prevention fence 1 on a quay 100 of a harbor, which captures drifting objects (not shown) that are swept away by waves from the quay 100 of a harbor during times such as high tides, and prevents the drifting objects from being carried away from the quay 100 into the sea. The outflow prevention fence 1 constructed by this construction method comprises a plurality of steel pipe piles 2, a plurality of posts 4, a plurality of beams 6, a plurality of temporary post fixing devices 8, and a plurality of post fixing concrete 10.

[0028] The steel pipe piles 2 are buried in the ground of the quay 100 at regular intervals along the sea-side edge of the quay 100 and support bases 16a of pillar bodies 16 of pillars 4 which are inserted inside the piles as described below. Each steel pipe pile 2 (see Figs. 2 to 6) has a pile body 12 and four receiving parts 13.

[0029] The pile body 12 is made of a cylindrical steel pipe. The pile body 12 is buried in the ground of the quay wall 100 so that the top end of the pile body 12 is aligned with the top surface of the quay wall 100 in a vertically extending position.

[0030] Each receiving part 13 receives and supports the support post temporary fixing tool 8 placed thereon from below as described later. Each receiving part 13 is made of an L-shaped metal fitting and is attached to the inner wall surface of the pile body 12 so as to protrude from the inner wall surface of the pile body 12 toward the inside in the radial direction of the pile body 12. The four receiving parts 13 are arranged at equal intervals in the circumferential direction of the pile body 12. Two of the four receiving parts 13 are arranged at positions facing each other in the radial direction of the pile body 12, and the remaining two receiving parts 13 are arranged at positions facing each other in the radial direction of the pile body 12 and in a direction perpendicular to the direction in which the two receiving parts 13 face each other. When the support post temporary fixing tool 8 is fixed to the receiving parts 13 as described later, any two receiving parts 13 facing each other in the radial direction of the pile body 12 are selected from the four receiving parts 13, and the support post temporary fixing tool 8 is placed and fixed on the two selected receiving parts 13. Each receiving portion 13 has a vertical plate portion 14 and a mounting portion 15 .

[0031] The mounting portion 15 is a portion on which the temporary support fixing device 8 is placed. The mounting portion 15 is flat and arranged substantially horizontally with the steel pipe pile 2 buried in the ground of the quay wall 100. The mounting portion 15 is fixed to the inner wall surface of the pile main body 12. The mounting portion 15 has a through hole 15a (see FIG. 6) that passes through the mounting portion 15 in the vertical direction. The through hole 15a is a long hole.

[0032] The vertical plate portion 14 is a plate-like portion extending downward from one end of the mounting portion 15 in a direction perpendicular to both the axial direction of the pile body 12 and the protruding direction of the mounting portion 15 from the inner wall surface of the pile body 12, and is fixed to the inner wall surface of the pile body 12. The mounting portion 15 is supported from below by this vertical plate portion 14.

[0033] The multiple pillars 4 (see FIG. 1 ) are fixed to corresponding ones of the multiple steel pipe piles 2 and are erected at specified intervals along the sea-side edge of the quay wall 100. Of the multiple pillars 4, the two pillars 4 arranged at both ends of the runoff prevention fence 1 each have a pillar body 16 and one bracket 18, and each of the pillars 4 arranged between the two pillars 4 at both ends also has a pillar body 16 and two brackets 18.

[0034] Each pillar body 16 of the multiple pillars 4 is composed of a cylindrical steel pipe having an outer diameter smaller than the inner diameter of the pile body of the steel pipe pile 2. Each pillar body 16 is fixed in a state in which a portion near one end in the extension direction (axial direction) is inserted inside the pile body 12 of the corresponding steel pipe pile 2 buried in the ground of the quay wall 100, and is thereby erected so as to extend upward in a substantially vertical direction from the upper surface of the quay wall 100. Each pillar body 16 has a base 16a fixed in a state in which it is inserted inside the pile body 12 of the corresponding steel pipe pile 2, and a top 16b located at the upper end of the pillar body 16 when the pillar body 16 is erected as described above.

[0035] 2 and 3, the base 16a is inserted into the pile body 12 of the steel pipe pile 2 with a gap between the inner wall surface of the pile body 12 and the outer circumferential surface of the base 16a. In this state, the base 16a is fixed by the pillar fixing concrete 10 (see FIG. 1) poured inside the pile body 12. The pillar body 16 is arranged so that the base 16a is concentric with the pile body 12 into which it is inserted.

[0036] The brackets 18 are parts to which the ends of the beams 6 are connected and which support those ends. The brackets 18 of the two posts 4 arranged at both ends of the spillway prevention fence 1 are attached to the tops 16b of the post bodies 16 of the posts 4 so as to protrude from the tops 16b to one side in a direction perpendicular to the axial direction of the post bodies 16. In addition, the two brackets 18 of each post 4 arranged between the two posts 4 at both ends of the spillway prevention fence 1 are attached to the tops 16b of the post bodies 16 of the posts 4 so as to protrude from the tops 16b to both sides in a direction perpendicular to the axial direction of the post bodies 16.

[0037] Each of the multiple beams 6 (see FIG. 1) is made of a steel pipe thinner than the pillar body 16. Each of the multiple beams 6 is disposed between adjacent pillars 4 among the multiple pillars 4 so as to extend in the arrangement direction of the pillars 4, and both ends of each beam 6 are connected to brackets 18 of the corresponding pillar 4. In this way, adjacent pillars 4 are connected to each other via the beams 6 disposed between them.

[0038] The plurality of temporary pillar fixing devices 8 are used to temporarily fix each of the plurality of pillars 4 to the steel pipe piles 2 before the bases 16a of the plurality of pillars 4 are inserted inside the pile bodies 12 of the corresponding ones of the plurality of steel pipe piles 2 and fixed by the pillar fixing concrete 10. Each temporary pillar fixing device 8 has a first temporary fixing device 21, a second temporary fixing device 22, four clamping fastening members 23, a first fixing fastening member 24 (see FIG. 4), and a second fixing fastening member 25.

[0039] The first temporary fixing device 21 and the second temporary fixing device 22 are metal band fittings fixed to the base 16a of the pillar body 16 of the pillar 4. As shown in Fig. 7 and Fig. 8, the first temporary fixing device 21 and the second temporary fixing device 22 are arranged separately on both sides of the base 16a of the pillar body 16 of the pillar 4 in a direction perpendicular to the axial direction of the base 16a, and are fastened to each other so as to sandwich the base 16a from both sides, thereby being fixed to the base 16a. The first temporary fixing device 21 is placed on an arbitrary receiving portion 13 of the four receiving portions 13 of the steel pipe pile 2 and fastened to the receiving portion 13, and the second temporary fixing device 22 is placed on another receiving portion 13 arranged opposite in the radial direction of the pile body 12 to the receiving portion 13 on which the first temporary fixing device 21 is placed and fastened, and fastened to the receiving portion 13.

[0040] As shown in FIG. 8, the first temporary fastener 21 has a first temporary fastener fitting portion 26, a first temporary fastener pressing protrusion portion 26a, a first temporary fastener one end side fastened portion 27, a first temporary fastener other end side fastened portion 28, and a first temporary fastener fixed portion 29.

[0041] The first temporary fixing device fitting portion 26 is curved so as to fit along the outer peripheral surface of the base 16a of the pillar main body 16 of the pillar 4, and is configured to be able to fit with the base 16a from one side in a direction perpendicular to its axial direction. The first temporary fixing device fitting portion 26 has a first temporary fixing device facing surface 26b which is a surface facing the outer peripheral surface of the base 16a when the base 16a of the pillar 4 is sandwiched between the first temporary fixing device 21 and the second temporary fixing device 22. This first temporary fixing device facing surface 26b is a curved surface facing the inside of the curve of the first temporary fixing device fitting portion 26.

[0042] The first temporary fixing tool pressing protrusion 26a protrudes from the first temporary fixing tool facing surface 26b, and is pressed against the outer circumferential surface of the base 16a when the first temporary fixing tool 21 clamps the base 16a of the pillar 4 between itself and the second temporary fixing tool 22. The first temporary fixing tool pressing protrusion 26a is provided in the center of the first temporary fixing tool facing surface 26b.

[0043] The first temporary fastener one-end fastened portion 27 is a flat portion of the first temporary fastener fitting portion 26 that protrudes from one end in a direction along the outer circumferential surface of the base 16a of the pillar 4, and is disposed to face a second temporary fastener other-end fastened portion 34 of the second temporary fastener 22, which will be described later, and is fastened to the second temporary fastener other-end fastened portion 34. The first temporary fastener one-end fastened portion 27 has two through holes 27a (see FIG. 9 ) that penetrate the first temporary fastener one-end fastened portion 27 in a direction in which the first temporary fastener one-end fastened portion 27 and the second temporary fastener other-end fastened portion 34, which will be described later, face each other, in other words, in a direction in which the first temporary fastener 21 and the second temporary fastener 22 sandwich the base 16a of the pillar 4.

[0044] First temporary fastener other end fastened portion 28 is a flat portion protruding from the end of first temporary fastener fitting portion 26 opposite first temporary fastener one end fastened portion 27, and is disposed to face second temporary fastener one end fastened portion 33 (described below) of second temporary fastener 22, and is fastened to second temporary fastener one end fastened portion 33. First temporary fastener other end fastened portion 28 has two through holes 28a (see FIG. 9) that penetrate first temporary fastener other end fastened portion 28 in its plate thickness direction.

[0045] The first temporary fixing device fixed portion 29 extends from the first temporary fixing device one-end fastened portion 27 so as to be able to be placed on the placing portion 15 of any one of the four receiving portions 13 of the steel pipe pile 2 in a state in which the column temporary fixing device 8 is fixed to the base 16a of the column 4 and the base 16a of the column 4 is inserted inside the pile body 12 of the steel pipe pile 2, and is configured to be able to be fastened to the placing portion 15 of the placed receiving portion 13 by the first fixing fastening member 24. The first temporary fixing device fixed portion 29 is in the form of a flat plate extending from the lower end of the first temporary fixing device one-end fastened portion 27 perpendicular to the first temporary fixing device one-end fastened portion 27 toward the second temporary fixing device other-end fastened portion 34 described below.

[0046] The first temporary fastener fixed part 29 has a through hole 29a (see FIG. 8) that passes through the first temporary fastener fixed part 29 in the up-down direction. This through hole 29a is an elongated hole, and is arranged such that, when the first temporary fastener fixed part 29 is placed on the mounting part 15 of the receiving part 13 of the steel pipe pile 2, the longitudinal direction of the through hole 29a is perpendicular to the longitudinal direction of the through hole 15a of the mounting part 15.

[0047] As shown in FIG. 8, the second temporary fastener 22 has a second temporary fastener fitting portion 32, a second temporary fastener pressing protrusion portion 32a, a second temporary fastener one end side fastened portion 33, a second temporary fastener other end side fastened portion 34, and a second temporary fastener fixed portion 35.

[0048] The second temporary fixing device fitting portion 32 is curved so as to fit along the outer peripheral surface of the base 16a of the pillar main body 16 of the pillar 4, and is configured to be able to fit into the base 16a from the side opposite to the first temporary fixing device fitting portion 26. The second temporary fixing device fitting portion 32 has a second temporary fixing device facing surface 32b which is a surface facing the outer peripheral surface of the base 16a when the base 16a of the pillar 4 is sandwiched between the first temporary fixing device 21 and the second temporary fixing device 22. This second temporary fixing device facing surface 32b is a curved surface facing the inside of the curvature of the second temporary fixing device fitting portion 32.

[0049] The second temporary fixing tool pressing protrusion 32a protrudes from the second temporary fixing tool facing surface 32b, and is pressed against the outer circumferential surface of the base 16a when the second temporary fixing tool 22 clamps the base 16a of the pillar 4 between itself and the first temporary fixing tool 21. The second temporary fixing tool pressing protrusion 32a is provided in the center of the second temporary fixing tool facing surface 32b.

[0050] The second temporary fastener one-end fastened portion 33 is a flat portion of the second temporary fastener fitting portion 32 that protrudes from one end located on the first temporary fastener other-end fastened portion 28 side in a direction along the outer circumferential surface of the base 16a of the pillar 4, and is disposed to face the first temporary fastener other-end fastened portion 28 and is fastened to the first temporary fastener other-end fastened portion 28. The second temporary fastener one-end fastened portion 33 has two through holes 33a that penetrate the second temporary fastener one-end fastened portion 33 in the direction in which the second temporary fastener one-end fastened portion 33 and the first temporary fastener other-end fastened portion 28 face each other, in other words, in the direction in which the first temporary fastener 21 and the second temporary fastener 22 sandwich the base 16a of the pillar 4.

[0051] The second temporary fastener other end fastened portion 34 is a flat plate-shaped portion that protrudes from the end of the second temporary fastener fitting portion 32 opposite to the second temporary fastener one end fastened portion 33, and is disposed to face the first temporary fastener one end fastened portion 27 and is fastened to the first temporary fastener one end fastened portion 27. The second temporary fastener other end fastened portion 34 has two through holes 34a that penetrate the second temporary fastener other end fastened portion 34 in the direction in which the second temporary fastener other end fastened portion 34 and the first temporary fastener one end fastened portion 27 face each other, in other words, in the direction in which the first temporary fastener 21 and the second temporary fastener 22 sandwich the base 16a of the pillar 4.

[0052] The second temporary fixing member fixed portion 35 extends from the second temporary fixing member one-end fastened portion 33 so as to be able to be placed on the placing portion 15 of another receiving portion 13 that faces in the radial direction of the pile body 12 to the receiving portion 13 on which the first temporary fixing member fixed portion 29 is placed and fastened, among the four receiving portions 13 of the steel pipe pile 2, in a state in which the column temporary fixing member 8 is fixed to the base portion 16a of the column 4 and the base portion 16a of the column 4 is inserted inside the pile body 12 of the steel pipe pile 2, and is configured to be able to be fastened to the placing portion 15 of the placed receiving portion 13 by the second fixing fastening member 25. The second temporary fixing member fixed portion 35 has a flat plate shape extending from the lower end of the second temporary fixing member one-end fastened portion 33 toward the first temporary fixing member other-end fastened portion 28 perpendicular to the second temporary fixing member one-end fastened portion 33.

[0053] The second temporary fastener fixed part 35 has a through hole 35a that passes through the second temporary fastener fixed part 35 in the up-down direction. This through hole 35a is an elongated hole, and is arranged such that, when the second temporary fastener fixed part 35 is placed on the mounting part 15 of the receiving part 13 of the steel pipe pile 2, the longitudinal direction of the through hole 35a is perpendicular to the longitudinal direction of the through hole 15a of the mounting part 15.

[0054] The four clamping fastening members 23 (see Figs. 2 to 4) fasten the first temporary fastener 21 and the second temporary fastener 22 so as to sandwich the base 16a of the pillar 4 disposed between the first temporary fastener 21 and the second temporary fastener 22. Two of the four clamping fastening members 23 are first clamping fastening members 40 that fasten one end fastened portion 27 of the first temporary fastener and the other end fastened portion 34 of the second temporary fastener, and the remaining two clamping fastening members 23 are second clamping fastening members 41 that fasten the other end fastened portion 28 of the first temporary fastener and the one end fastened portion 33 of the second temporary fastener.

[0055] Each of the two first clamping fastening members 40 has a first clamping bolt 42, a first clamping nut 43, and two washers 44, 45 (see FIG. 8). The first clamping bolts 42 of the two first clamping fastening members 40 are inserted into two through holes 27a of the first temporary fastener one-end fastened portion 27 and into the through hole 34a of the second temporary fastener other-end fastened portion 34 facing the through hole 27a inserted therein, in a posture extending in the clamping direction of the base 16a of the pillar 4 by the first temporary fastener 21 and the second temporary fastener 22. The first clamping nuts 43 corresponding to the two first clamping bolts 42 are screwed and tightened, thereby fastening the first temporary fastener one-end fastened portion 27 and the second temporary fastener other-end fastened portion 34. A washer 44 is interposed between the bolt head of each first clamping bolt 42 and the fastened portion 27 on one end of the first temporary fastener, and a washer 45 is interposed between the first clamping nut 43 screwed onto each first clamping bolt 42 and the fastened portion 34 on the other end of the second temporary fastener.

[0056] Further, each of the two second clamping fastening members 41 has a second clamping bolt 46, a second clamping nut 47, and two washers 48, 49. The second clamping bolts 46 of the two second clamping fastening members 41 are inserted into two through holes 28a of the first temporary fastener other end fastened portion 28 and into the through hole 33a of the second temporary fastener one end fastened portion 33 facing the through hole 28a inserted therein, in a posture extending in the clamping direction of the base 16a of the pillar 4 by the first temporary fastener 21 and the second temporary fastener 22. The second clamping nuts 47 corresponding to the two second clamping bolts 46 are screwed and tightened, thereby fastening the first temporary fastener other end fastened portion 28 and the second temporary fastener one end fastened portion 33. A washer 48 is interposed between the bolt head of each second clamping bolt 46 and the other end fastened portion 28 of the first temporary fastener, and a washer 49 is interposed between the second clamping nut 47 screwed onto each second clamping bolt 46 and the one end fastened portion 33 of the second temporary fastener.

[0057] The first fastening member 24 (see FIG. 4 ) is capable of fastening the first temporary fixing device fixed portion 29 of the first temporary fixing device 21 fastened to the second temporary fixing device 22 to the mounting portion 15 on which it is placed, so as to restrict upward displacement of the first temporary fixing device fixed portion 29 from the mounting portion 15 while allowing displacement of the first temporary fixing device 21 in a direction toward and away from the second temporary fixing device 22. Specifically, the first fastening member 24 is capable of fastening the first temporary fixing device fixed portion 29 to the mounting portion 15 on which it is placed, so as to restrict upward displacement of the first temporary fixing device fixed portion 29 from the mounting portion 15 while allowing rotation of the first temporary fixing device 21 about the first fastening member 24 so as to approach and separate from the second temporary fixing device 22.

[0058] The first fastening member 24 has a first fixing bolt 51, a first fixing nut 52, and two washers (not shown). The first fixing bolt 51 is inserted in a vertically extending position through the through hole 29a of the first temporary fastener fixed portion 29 and the through hole 15a of the mounting portion 15 on which the first temporary fastener fixed portion 29 is placed, and is arranged so that the bolt head of the first fixing bolt 51 is located below the mounting portion 15. The first fixing nut 52 is screwed onto the first fixing bolt 51 at a position above the first temporary fastener fixed portion 29 and tightened, thereby fastening the first temporary fastener fixed portion 29 to the mounting portion 15. One of the two washers is interposed between the bolt head of the first fixing bolt 51 and the mounting portion 15, and the other washer is interposed between the first fixing nut 52 screwed onto the first fixing bolt 51 and the first temporary fixing device fixed portion 29. Then, by fastening the first fixing bolt 51 and the first fixing nut 52 as described above, the displacement of the first temporary fixing device fixed portion 29 upward from the mounting portion 15 is restrained, while by adjusting the fastening force (the tightening force of the first fixing nut 52), it is possible to allow the first temporary fixing device 21 to rotate about the first fixing bolt 51 in the direction in which the first temporary fixing device 21 approaches or moves away from the second temporary fixing device 22.

[0059] The second fixing fastening member 25 (see Figures 2 and 4) is capable of fastening the second temporary fixing tool fixed portion 35 to the mounting portion 15 on which it is placed, so that when the second temporary fixing tool fixed portion 35 of the second temporary fixing tool 22 fastened to the first temporary fixing tool 21 is placed on the mounting portion 15 of another receiving portion 13 that faces the receiving portion 13 on which the first temporary fixing tool fixed portion 29 is placed in the radial direction of the pile main body 12, displacement of the second temporary fixing tool 22 in a direction toward and away from the first temporary fixing tool 21 is permitted, while restricting displacement of the second temporary fixing tool fixed portion 35 upward from the mounting portion 15. Specifically, the second fixing fastening member 25 is capable of fastening the second temporary fixing tool fixed portion 35 to the mounting portion 15 on which it is placed so as to restrict displacement of the second temporary fixing tool fixed portion 35 upward from the mounting portion 15, while allowing the second temporary fixing tool 22 to rotate around the second fixing fastening member 25 so as to move towards and away from the first temporary fixing tool 21.

[0060] The second fastening member 25 has a second fixing bolt 55, a second fixing nut 56, and two washers (not shown). The second fixing bolt 55 is inserted in a vertically extending position through the through hole 35a of the second temporary fastener fixed portion 35 and the through hole 15a of the mounting portion 15 on which the second temporary fastener fixed portion 35 is placed, and is arranged so that the bolt head of the second fixing bolt 55 is located below the mounting portion 15. The second fixing nut 56 is screwed onto the second fixing bolt 55 at a position above the second temporary fastener fixed portion 35 and tightened, thereby fastening the second temporary fastener fixed portion 35 to the mounting portion 15. One of the two washers is interposed between the bolt head of second fixing bolt 55 and mounting portion 15, and the other washer is interposed between second fixing nut 56 screwed onto second fixing bolt 55 and second temporary fastener fixed portion 35. Then, by fastening second fixing bolt 55 and second fixing nut 56 as described above, the displacement of second temporary fastener fixed portion 35 upward from mounting portion 15 is restrained, while by adjusting the fastening force (tightening force of second fixing nut 56), it is possible to allow rotation of second temporary fastener 22 about second fixing bolt 55 in the direction in which second temporary fastener 22 approaches or moves away from first temporary fastener 21.

[0061] Each of the multiple pillar fixing concrete pieces 10 (see FIG. 1 ) is intended to fix the base 16a of the pillar 4 inserted inside the pile body 12 of the multiple steel pipe piles 2 inside the pile body 12. The pillar fixing concrete pieces 10 are filled into the gap between the inner wall surface of the pile body 12 and the outer circumferential surface of the base 16a of the pillar 4. In addition to the base 16a of the pillar 4, the temporary pillar fixing device 8 fixed to the base 16a is also embedded in the pillar fixing concrete pieces 10.

[0062] Next, a construction method according to this embodiment for constructing the outflow prevention fence 1 having the above-mentioned configuration on the quay wall 100 of a harbor will be described.

[0063] The construction method for the escape prevention fence 1 according to this embodiment includes a post temporary fixing device preparation process for preparing the post temporary fixing device 8 as described above, a steel pipe pile burying process, a post insertion process, a post temporary fixing process, a beam connecting process, a post height position adjustment process, and a post permanent fixing process.

[0064] Specifically, in the steel pipe pile embedding step, the plurality of steel pipe piles 2 (see FIG. 1 ) are embedded at predetermined intervals into the ground of a quay 100 of a harbor. At this time, each steel pipe pile 2 is embedded in the ground so that its axial direction (extension direction) coincides with the vertical direction and its upper end coincides with the position of the upper surface of the quay 100.

[0065] After this steel pipe pile burying process, a pillar insertion process is performed in which the bases 16a of the multiple pillars 4 are inserted into the inside of the pile bodies 12 of the multiple buried steel pipe piles 2, and a pillar temporary fixing process is performed in which the bases 16a of the multiple pillars 4 are inserted into the inside of the pile bodies 12 of the multiple steel pipe piles 2 and the multiple pillars 4 extending in the vertical direction are temporarily fixed to each of the multiple steel pipe piles 2 using temporary pillar fixing devices 8.

[0066] Specifically, first, a marking 104 (see FIG. 10) indicating a target installation position 103, which is a target position of the base 16a of the support 4 where the temporary support fixture 8 is to be attached, is provided on the base 16a by drawing a line or attaching tape. The target installation position 103 indicated by the marking 104 is determined based on a preset embedment length L of the support body 16 of the support 4 and a distance D in a direction along the axial direction of the steel pipe pile 2 from the upper end of the steel pipe pile 2, which coincides with a position 102 of the upper surface of the quay wall 100 when the steel pipe pile 2 is embedded in the ground of the quay wall 100, to the upper surface of the placement part 15. Specifically, the embedment length L corresponds to the length in the axial direction of the base 16a of the support 4 to be inserted inside the pile body 12 of the steel pipe pile 2, and is the length of a portion of the support body 16 of the support 4 to be embedded inside the pile body 12 in the support fixing concrete 10. The position away from the lower end of the pillar body 16 toward the top 16b by the distance calculated by subtracting the distance D from this embedded length L is set as the installation guide position 103.

[0067] Next, the support column temporary fixture 8 is attached to the base 16a of the support column 4 so that the position of the underside of the first and second temporary fixture fixed portions 29, 35 of the support column temporary fixture 8 coincides with the target attachment position 103 indicated by the marking 104 (see Figs. 11 and 12). At this time, the first temporary fixture 21 and the second temporary fixture 22 are fastened by the first clamping fastening member 40 and the second clamping fastening member 41 so that the base 16a of the support column 4 is sandwiched between the first temporary fixture 21 and the second temporary fixture 22 from both sides in a direction perpendicular to the axial direction, thereby fixing the support column temporary fixture 8 to the base 16a of the support column 4.

[0068] Specifically, first, the first temporary fastener fitting portion 26 and the second temporary fastener fitting portion 32 are fitted to the base portion 16a of the support 4 from both sides in a direction perpendicular to the axial direction (see Figs. 7 and 8). At this time, the positions of the lower surfaces of the first and second temporary fastener fixed portions 29, 35 are aligned with the installation guide position 103 (see Fig. 12). In this state, the first clamping bolts 42 of the two first clamping fastening members 40 are inserted into the two through holes 27a of the first temporary fastener one-end fastening portion 27 and the two through holes 34a of the second temporary fastening other-end fastening portion 34 that face each other, and the first clamping nuts 43 are screwed into the first clamping bolts 42 and tightened, thereby fastening the first temporary fastening one-end fastening portion 27 and the second temporary fastening other-end fastening portion 34 with the first clamping fastening members 40. At this time, a washer 44 is interposed between the bolt head of each of the first clamping bolts 42 and the first temporary fastener one-end fastened portion 27, and a washer 45 is also interposed between each of the first clamping nuts 43 and the second temporary fastener other-end fastened portion 34. Furthermore, second clamping bolts 46 of two second clamping fastening members 41 are inserted into the opposing ones of the two through holes 28a of the first temporary fastener other-end fastened portion 28 and the two through holes 33a of the second temporary fastener one-end fastened portion 33, and second clamping nuts 47 are screwed onto each of the second clamping bolts 46 and tightened, thereby fastening the first temporary fastener other-end fastened portion 28 and the second temporary fastener one-end fastened portion 33 with the second clamping fastening members 41. At this time, a washer 48 is interposed between the bolt head of each second clamping bolt 46 and the other end side fastened portion 28 of the first temporary fastener, and a washer 49 is also interposed between each second clamping nut 47 and one end side fastened portion 33 of the second temporary fastener.

[0069] Next, the base 16a of each pillar 4 to which the pillar temporary fixing device 8 is fixed as described above is inserted from above into the inside of the pile body 12 of the steel pipe pile 2 buried in the ground of the quay wall 100, and the first temporary fixing device fixed part 29 and the second temporary fixing device fixed part 35 of the pillar temporary fixing device 8 are placed on the mounting parts 15 of the two receiving parts 13 facing each other in the radial direction of the pile body 12 of the steel pipe pile 2. Then, the first temporary fixing device fixed part 29 is fastened to the mounting part 15 of the receiving part 13 on which it is placed by the first fastening member 24, and the second temporary fixing device fixed part 35 is fastened to the mounting part 15 of the receiving part 13 on which it is placed by the second fastening member 25.

[0070] Specifically, a first fixing bolt 51 is inserted through the through hole 29a of the first temporary fastener fixed portion 29 and through hole 15a of the mounting portion 15 on which the first temporary fastener fixed portion 29 is placed, and a first fixing nut 52 is screwed onto the first fixing bolt 51 and tightened, thereby fastening the first temporary fastener fixed portion 29 to the mounting portion 15 of the receiving portion 13 on which it is placed. Also, a second fixing bolt 55 is inserted through the through hole 35a of the second temporary fastener fixed portion 35 and through hole 15a of the mounting portion 15 on which the second temporary fastener fixed portion 35 is placed, and a second fixing nut 56 is screwed onto the second fixing bolt 55 and tightened, thereby fastening the second temporary fastener fixed portion 35 to the mounting portion 15 of the receiving portion 13 on which it is placed.

[0071] During this fastening, the position of the first fixing bolt 51 can be changed within both through holes 29a, 15a in the longitudinal direction of the through hole 29a of the first temporary fixing fixture fixed part 29, which is a long hole, and in the longitudinal direction of the through hole 15a of the mounting part 15, which is a long hole extending in a direction perpendicular to the through hole 29a, and the position of the second fixing bolt 55 can be changed within both through holes 35a, 15a in the longitudinal direction of the through hole 35a of the second temporary fixing fixture fixed part 35, which is a long hole, and in the longitudinal direction of the through hole 15a of the mounting part 15, which is a long hole extending in a direction perpendicular to the through hole 35a, so that it is possible to adjust the horizontal positions of the pillar temporary fixing tool 8 relative to the steel pipe pile 2 and the base 16a of the pillar 4 to which it is fixed. Therefore, during this fastening, the horizontal position of the base 16a of the pillar 4 relative to the steel pipe pile 2 is adjusted so that the base 16a of the pillar 4 is concentric with the pile body 12 of the steel pipe pile 2.

[0072] During this fastening, the fastening force of the first fixing fastening member 24 (the tightening force of the first fixing nut 52) ​​prevents the first temporary fastener fixed portion 29 from being displaced upward from the support portion 15 on which the first temporary fastener fixed portion 29 is placed, while the first temporary fastener 21 is tightened so that when a force is applied to the first temporary fastener 21 in a direction in which the first temporary fastener 21 moves toward or away from the second temporary fastener 22, the first temporary fastener 21 is permitted to rotate in that direction about the first fixing bolt 51. Similarly, the fastening force of the second fixing fastening member 25 (the tightening force of the second fixing nut 56) prevents the second temporary fixing device fixed portion 35 from being displaced upward from the support portion 15 on which the second temporary fixing device fixed portion 35 is placed, while the second fixing nut 56 is tightened so that when a force is applied to the second temporary fixing device 22 in a direction in which the second temporary fixing device 22 moves toward or away from the first temporary fixing device 21, the second temporary fixing device 22 is permitted to rotate in that direction about the second fixing bolt 55.

[0073] Next, a beam connecting process is performed in which adjacent columns 4 out of the multiple columns 4 temporarily fixed to the multiple steel pipe piles 2 are connected with a beam 6 (see FIG. 1) disposed between them. In this beam connecting process, the ends of the beam 6 corresponding to the brackets 18 of each column 4 are connected with bolts and nuts (not shown).

[0074] Then, a post height position adjustment process is performed to adjust the height of the post 4 so that the beam 6 connecting the adjacent posts 4 extends horizontally at a preset height position. The preset height position is a height position preset based on the maximum flood depth expected in the port where the outflow prevention fence 1 is installed. Specifically, the preset height position is set to a predetermined height position above the height position of the center of gravity of various drifting objects that the outflow prevention fence 1 is intended to prevent from flowing out when they float in the sea with the maximum flood depth. In other words, among various drifting objects expected to collide with the outflow prevention fence 1, the one whose center of gravity is the highest when it floats in the sea with the maximum flood depth is selected, and the preset height position is set to a predetermined height position above the height position of the center of gravity of the selected drifting object when it floats in the sea with the maximum flood depth. By setting the height position of the beam 6 to such a preset height position, it is possible to prevent the drifting object from overturning over the beam 6 and flowing out to sea when it collides with the beam 6.

[0075] In the pillar height position adjustment process, as shown in FIG. 13 , the first clamping nut 43 fastening the one end fastened portion 27 of the first temporary fastener to the other end fastened portion 34 of the second temporary fastener is loosened and moved toward the tip of the first clamping bolt 42, and the other end fastened portion 34 of the second temporary fastener is slightly displaced in a direction away from the one end fastened portion 27 of the first temporary fastener, thereby slightly rotating the second temporary fastener 22 around the first fixing bolt 51 in a direction away from the first temporary fastener 21. Also, the second clamping nut 47 fastening the other end fastened portion 28 of the first temporary fastener and the one end fastened portion 33 of the second temporary fastener is loosened and moved toward the tip side of the second clamping bolt 46, and the other end fastened portion 28 of the first temporary fastener is slightly displaced in a direction away from the one end fastened portion 33 of the second temporary fastener, thereby slightly rotating the first temporary fastener 21 around the second fixing bolt 55 in a direction away from the second temporary fastener 22. This reduces the clamping force of the base 16a of the pillar 4 by the first temporary fastener fitting portion 26 and the second temporary fastener fitting portion 32, releasing the temporary fixation of the pillar 4, and makes it possible to displace the base 16a of the pillar 4 up and down relative to the pillar temporary fastener 8 along the axial direction of the pillar main body 16 (see FIG. 14). After releasing the temporary fixation of the pillars 4 in this manner, the height position of each pillar 4 is adjusted to a height position where the beam 6 connected to that pillar 4 assumes a posture extending horizontally at the set height position. Then, after adjusting the height position of each pillar 4, the first clamping nut 43 is retightened and the second clamping nut 47 is retightened to fasten the first temporary fixing device 21 and the second temporary fixing device 22 again with the first and second clamping fastening members 40, 41, thereby fixing the height position of the pillar 4.

[0076] Then, after the post height position adjustment process, a post fixing process is performed in which post fixing concrete 10 (see FIG. 1) is poured inside the pile bodies 12 of the multiple steel pipe piles 2, and the bases 16a of the multiple posts 4 are fixed to the corresponding steel pipe piles 2 into which they have been inserted, using the post fixing concrete 10. In this post fixing process, the bases 16a of the posts 4 and the temporary post fixtures 8 fixed to the bases 16a are embedded in the post fixing concrete 10.

[0077] The outflow prevention fence 1 according to this embodiment is constructed in the manner described above.

[0078] In this embodiment, the bases 16a of the multiple pillars 4 are temporarily fixed by the temporary pillar fasteners 8 to the multiple steel pipe piles 2 buried at predetermined intervals in the ground of the quay 100 of the port, and then the multiple pillars 4 are erected at predetermined intervals, and the temporary fixing of the pillars 4 is released by a simple operation of loosening the fastening between the first temporary fastener 21 and the second temporary fastener 22 of the temporary pillar fastener 8 by the first clamping fastening member 40 and the second clamping fastening member 41, and rotating the first temporary fastener 21 and the second temporary fastener 22 in directions away from each other, thereby making it possible to adjust the height position of the pillars 4. Therefore, after the multiple pillars 4 are erected at predetermined intervals on the quay 100 of the port, the height position of each pillar 4 can be easily adjusted so that the beams 6 connecting the adjacent pillars 4 extend horizontally at the set height position.

[0079] In this embodiment, the base 16a of the support 4 inserted into the pile body 12 is temporarily fixed to the steel pipe pile 2 while the support temporary fixing device 8 is accommodated inside the pile body 12 of each of the steel pipe piles 2, and in the support permanent fixing step, the base 16a of the support 4 and the support temporary fixing device 8 fixed to the base 16a are embedded in the support fixing concrete 10. This allows the base 16a of the support 4 to be fixed inside the pile body 12 of each steel pipe pile 2 by the support temporary fixing device 8 in addition to the support fixing concrete 10, so that the base 16a of the support 4 can be fixed to the steel pipe pile 2 more firmly. Moreover, since the support temporary fixing device 8 is covered with the support fixing concrete 10, it is possible to prevent the support temporary fixing device 8 from coming into contact with seawater and causing corrosion of the support temporary fixing device 8.

[0080] In addition, in this embodiment, the first temporary fixing device 21 has a first temporary fixing device pressing protrusion 26a that protrudes from the first temporary fixing device opposing surface 26b and is pressed against the outer circumferential surface of the base 16a of the pillar 4 when the first temporary fixing device 21 and the second temporary fixing device 22 sandwich the base 16a of the pillar 4, and the second temporary fixing device 22 has a second temporary fixing device pressing protrusion 32a that protrudes from the second temporary fixing device opposing surface 32b and is pressed against the outer circumferential surface of the base 16a of the pillar 4 when the second temporary fixing device 22 and the first temporary fixing device 21 sandwich the base 16a of the pillar 4. Therefore, when the base 16a of the support 4 is sandwiched between the first temporary fastener 21 and the second temporary fastener 22 from both sides in a direction perpendicular to the axial direction thereof to fix the support temporary fastener 8 to the base 16a of the support 4, the first temporary fastener pressing protrusions 26a and the second temporary fastener pressing protrusions 32a are pressed against the outer circumferential surface of the base 16a of the support 4 with a high pressing force concentrated thereon. Therefore, the support temporary fastener 8 can be fixed more firmly to the base 16a of the support 4.

[0081] (Modification) The construction method of the outflow prevention fence according to the present invention is not necessarily limited to the above. For example, the construction method of the outflow prevention fence according to the present invention may employ the following configuration.

[0082] In the construction method according to the present invention, a temporary support fastener that is not attached to the base of the support may be inserted inside the pile body of each steel pipe pile and the temporary support fastener may be fixed to the steel pipe pile, and then the base of each support may be inserted inside the pile body of each steel pipe pile and the temporary support fastener may be fixed to the base.

[0083] Specifically, in the construction method according to the modified example of the present invention, similarly to the construction method according to the embodiment, markings 104 indicating the installation guide positions 103 are provided on the bases 16a of the plurality of supports 4, and the plurality of steel pipe piles 2 are buried in the ground of a quay wall 100 of a harbor in a steel pipe pile burying step. Thereafter, as shown in Fig. 15, a plurality of support temporary fasteners 8 in which the first temporary fastener 21 and the second temporary fastener 22 are connected by the first clamping fastening member 40 and the second clamping fastening member 41 are inserted into the inside of the pile main bodies 12 of the plurality of steel pipe piles 2 buried in the ground of the quay wall 100, and the first temporary fastener fixed portion 29 and the second temporary fastener fixed portion 35 of each support temporary fastener 8 are placed on the placement portion 15 of the corresponding receiving portion 13. At this time, the first clamping nut 43 and the second clamping nut 47 of each pillar temporary fixing device 8 are kept in a loosened state so that there is enough space between the first temporary fixing device fitting portion 26 and the second temporary fixing device fitting portion 32 to allow the base 16a of the pillar 4 to be inserted with ease.

[0084] 16, the first temporary fastener fixed portion 29 and the second temporary fastener fixed portion 35 are fastened to the mounting portion 15 of the receiving portion 13 on which they are respectively placed. This fastening is performed in the same manner as the fastening of the first and second temporary fastener fixed portions 29, 35 to the corresponding mounting portions 15 of the receiving portion 13 performed in the above embodiment. As a result, the support temporary fastener 8 is fixed to each steel pipe pile 2 inside the pile main body 12 of that steel pipe pile 2.

[0085] Then, the base 16a of each pillar 4 is inserted into the inside of the pile body 12 of each steel pipe pile 2, and the base 16a is inserted between the first temporary fixing device fitting portion 26 and the second temporary fixing device fitting portion 32 of the pillar temporary fixing device 8 fixed on the inside of the pile body 12. Then, each support 4 is positioned at a height where the positions of the undersides of the first temporary fastener fixed portion 29 and the second temporary fastener fixed portion 35 coincide with the target attachment position 103 indicated by the markings 104 on the base 16a of the support 4, and the first clamping nut 43 of the first clamping fastening member 40 is tightened so that the first temporary fastener one end fastened portion 27 and the second temporary fastener other end fastened portion 34 are fastened together, and the second clamping nut 47 of the second clamping fastening member 41 is tightened so that the first temporary fastener other end fastened portion 28 and the second temporary fastener one end fastened portion 33 are fastened together. As a result, the base portion 16a is sandwiched between the first temporary fixing tool fitting portion 26 and the second temporary fixing tool fitting portion 32, and each support pillar 4 is temporarily fixed.

[0086] Thereafter, as in the above embodiment, the height position of each pillar 4 is adjusted in the pillar height position adjustment process, and then in the pillar permanent fixing process, pillar fixing concrete 10 is poured inside the pile body 12 of each steel pipe pile 2 to fix the base 16a of each pillar 4, and the temporary pillar fixing device 8 fixed to the base 16a is embedded in the pillar fixing concrete 10.

[0087] In the construction method according to the present invention, a temporary support fixture may be fixed to a portion of the support that is above the base that is inserted inside the pile body, and the temporary support fixture may be placed on a mounting part of a receiving part that is arranged above the upper end of the pile body of the steel pipe pile and fastened to temporarily fix the support to the steel pipe pile. In this case, concrete may be poured inside the pile body of the steel pipe pile to fix the base of the support inserted inside the pile body with the concrete, and then the temporary support fixture may be detached and removed from the support and the steel pipe pile. [Explanation of symbols]

[0088] 1. Flow prevention fence 2 Steel pipe pile 4 pillars 6 Beam 8 Temporary support fixture 10 Pillar fixing concrete 16a base 21 First temporary fixture 22 Second temporary fixing device 23 Clamping fasteners 24 First fastening member 25 Second fastening member 26 First temporary fixing device fitting portion 26a First temporary fixing device pressing protrusion 26b First temporary fixing tool facing surface 27 First temporary fixing tool one end side fastening part 28: Fastened portion on other end of first temporary fastener 29 First temporary fixing tool fixed part 32 Second temporary fixing device fitting portion 32a Second temporary fixing device pressing protrusion 32b Second temporary fixing tool facing surface 33 Second temporary fixing tool one end side fastening part 34: Other end of second temporary fastener 35 Second temporary fixing tool fixed part 40 First clamping fastening member 41 Second clamping fastening member

Claims

1. A method for constructing a floating prevention fence on a quay of a port to prevent drifting objects from floating out to sea from the quay of the port, comprising the steps of: a steel pipe pile embedding step of embedding a plurality of steel pipe piles in the ground of the quay at predetermined intervals; a pillar insertion process for inserting bases of a plurality of pillars into the inside of the plurality of steel pipe piles buried in the ground of the quay; a step of temporarily fixing the plurality of supports, each having its base inserted inside the plurality of steel pipe piles, to each of the plurality of steel pipe piles in a vertically extending position by a plurality of support temporary fixing devices corresponding to the plurality of supports, the temporary fixing of the plurality of supports in this step being performed in a form in which the fixing of the plurality of supports to each of the plurality of steel pipe piles can be released; and A beam connecting process of connecting adjacent columns among the plurality of columns temporarily fixed to the plurality of steel pipe piles with a beam disposed between them; a column height position adjustment process for releasing the temporary fixation of the plurality of columns by the plurality of column temporary fixers and adjusting the height position of each of the plurality of columns to a height position where the posture of the beam connecting the adjacent columns is a posture extending horizontally at a preset set height position; This construction method for an escape prevention fence comprises a post fixing process, which comprises, after the post height position adjustment process, pouring concrete into the inside of each of the multiple steel pipe piles and fixing the bases of the multiple posts to the corresponding ones of the multiple steel pipe piles into which they are inserted with the concrete.

2. The method further includes a support temporary fixture preparation step of preparing a plurality of support temporary fixtures, each of which has a first temporary fixture and a second temporary fixture that are arranged separately on both sides of the support in a direction perpendicular to the axial direction of the support, a clamping fastening member that can fasten the first temporary fixture and the second temporary fixture so that the first temporary fixture and the second temporary fixture sandwich the support arranged between them, a first fixing fastening member that fastens the first temporary fixture to the steel pipe pile, and a second fixing fastening member that fastens the second temporary fixture to the steel pipe pile, In the pillar temporary fixing step, the first temporary fixing device and the second temporary fixing device are fastened by the clamping fastening members so that each of the multiple pillars is sandwiched between the first temporary fixing device and the second temporary fixing device from both sides in a direction perpendicular to the axial direction of the multiple pillars, thereby fixing the pillar temporary fixing device to each of the multiple pillars, and the first temporary fixing device is fastened to the steel pipe pile by the first fixing fastening members in a manner that restricts displacement of the first temporary fixing device in a vertical direction while allowing displacement of the first temporary fixing device in a direction approaching and moving away from the second temporary fixing device, and further, the second temporary fixing device is fastened to the steel pipe pile by the second fixing fastening members in a manner that restricts displacement of the second temporary fixing device in a vertical direction while allowing displacement of the second temporary fixing device in a direction approaching and moving away from the first temporary fixing device, 2. The construction method for an escape prevention fence as described in claim 1, wherein, in the post height position adjustment process, the fastening of the first temporary fastener and the second temporary fastener by the clamping fastening member is loosened to displace the first temporary fastener and the second temporary fastener in a direction away from each other to release the temporary fastening of the post, and then the height position of the post is adjusted to a height position where the beam is positioned so as to extend horizontally at the set height position, and then the first temporary fastener and the second temporary fastener are re-fastened by the clamping fastening member to fix the height position of the post.

3. In the column temporary fixing step, the column temporary fixing tool is fixed to the base of the column, and the base of the column is temporarily fixed to the steel pipe pile by the column temporary fixing tool while the column temporary fixing tool is accommodated inside the steel pipe pile, 3. The construction method for an escape prevention fence according to claim 1 or 2, wherein in the post permanent fixing process, the base of the post and the post temporary fixing device fixed to the base are embedded in the concrete.

4. A temporary support fixture used to temporarily fix the support to the steel pipe pile in the construction method of the outflow prevention fence according to claim 2, a first temporary fixing tool and a second temporary fixing tool arranged separately on both sides of the support in a direction perpendicular to an axial direction of the support; a clamping fastening member capable of fastening the first temporary fixing tool and the second temporary fixing tool such that the first temporary fixing tool and the second temporary fixing tool clamp the support pillar disposed therebetween; and a first fastening member capable of fastening the first temporary fixing device to the steel pipe pile in a manner that allows displacement of the first temporary fixing device in a direction toward or away from the second temporary fixing device while restricting displacement of the first temporary fixing device in a vertical direction; and a second fastening member capable of fastening the second temporary fixing device to the steel pipe pile in a manner that allows displacement of the second temporary fixing device in a direction toward or away from the first temporary fixing device while restricting displacement of the second temporary fixing device in an up-down direction.

5. the first temporary fixing device has a first temporary fixing device fitting portion that can be fitted to the support from one side in a direction perpendicular to its axial direction; a first temporary fixing device one-end fastened portion that protrudes from one end of the first temporary fixing device fitting portion in a direction perpendicular to both the direction along the axial direction of the support and the fitting direction of the first temporary fixing device fitting portion with respect to the support and is fastened to the second temporary fixing device by the clamping fastening member; a first temporary fixing device other-end fastened portion that protrudes from an end of the first temporary fixing device fitting portion opposite the first temporary fixing device one-end fastened portion and is fastened to the second temporary fixing device by the clamping fastening member; and a first temporary fixing device fixed portion that extends from the first temporary fixing device one-end fastened portion and is configured to be fastened to the steel pipe pile by the first fixing fastening member, The second temporary fastener includes a second temporary fastener fitting portion that can be fitted to the support from the opposite side to the first temporary fastener fitting portion, and a second temporary fastener that protrudes from one end of the second temporary fastener fitting portion in a direction perpendicular to both a direction along the axial direction of the support and a fitting direction of the second temporary fastener fitting portion to the support, and is disposed to face the other end fastened portion of the first temporary fastener, and is fastened to the other end fastened portion of the first temporary fastener by the clamping fastening member. the second temporary fixing device has a one-end side fastened portion, a second temporary fixing device other-end side fastened portion that protrudes from an end of the second temporary fixing device fitting portion opposite to the second temporary fixing device one-end side fastened portion and is arranged to face the first temporary fixing device one-end side fastened portion and is fastened to the first temporary fixing device one-end side fastened portion by the clamping fastening member, and a second temporary fixing device fixed portion that extends from the second temporary fixing device one-end side fastened portion and is configured to be fastened to the steel pipe pile by the second fixing fastening member, the first temporary fixing device fixed portion has a through hole penetrating the first temporary fixing device fixed portion, the through hole having a penetrating direction along an axial direction of the support when the first temporary fixing device fitting portion is fitted into the support, the second temporary fastener fixed portion has a through hole penetrating the second temporary fastener fixed portion, the through hole having a penetrating direction along an axial direction of the support when the second temporary fastener fitting portion is fitted into the support, The first fastening member has a first fixing bolt that is inserted into the first fixed portion through hole in an attitude extending in a direction along the axial direction of the support and fastens the first temporary fixing device fixed portion to the steel pipe pile, The pillar temporary fixing device according to claim 4, wherein the second fixing fastening member has a second fixing bolt that is inserted into the second fixed part through hole in an orientation extending in a direction along the axial direction of the pillar to fasten the second temporary fixing device fixed part to the steel pipe pile.

6. the first temporary fixing device has a first temporary fixing device opposing surface that is a surface that faces an outer circumferential surface of the support when the support is sandwiched between the first temporary fixing device and the second temporary fixing device, and a first temporary fixing device pressing protrusion that protrudes from the first temporary fixing device opposing surface and is pressed against the outer circumferential surface of the support when the first temporary fixing device and the second temporary fixing device sandwich the support, 6. The pillar temporary fixing device according to claim 4 or 5, wherein the second temporary fixing device has a second temporary fixing device opposing surface which is a surface which faces an outer peripheral surface of the pillar when the pillar is sandwiched between the second temporary fixing device and the first temporary fixing device, and a second temporary fixing device pressing protrusion portion which protrudes from the second temporary fixing device opposing surface and is pressed against the outer peripheral surface of the pillar when the second temporary fixing device and the first temporary fixing device sandwich the pillar.

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