JP5264978B2 - Water cutoff wall body for deadline and deadline construction method using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water cutoff wall body for cutoff, capable of facilitating, simplifying and shortening a diving operation and shortening a construction period. <P>SOLUTION: The water cutoff wall body for cutoff includes: a floor base 11 of a water cutoff structure installed in a surrounding wall shape on a pedestal provided under a water surface of a structure, an internal frame having columns 16 erected at a prescribed interval on the floor base 11, and a water cutoff wall composed of a plurality of division water cutoff plates 19 inserted or externally provided between the columns 16. By tightening means, at least one of parts between the floor base 11 and the division water cutoff plate 19 and between the column 16 and the division water cutoff plate 19 is tightened through sealants 20-1 and 20-2 for water cutoff, the sealant is compressed by the division water cutoff plate 19 which receives an external pressure by a water pressure, and thus a water cutoff effect is demonstrated. <P>COPYRIGHT: (C)2013,JPO&amp;INPIT

Description

  In the present invention, when performing seismic reinforcement of underwater or underwater structures in rivers and estuaries, such as bridge piers, the periphery of the piers in the water is cut off, and the water inside the piers is removed for reinforcement and / or repair. The present invention relates to a cutoff water wall for performing work in the atmosphere and a cutoff method using the same.

  In Japan, an earthquake-prone country, seismic reinforcement of existing large structures is urgently required from the viewpoint of ensuring safety in the event of a major earthquake. For example, as a seismic reinforcement method for a pier made of reinforced concrete, a reinforcement and / or repair method in which a reinforced concrete, a steel plate, or the like is provided around the pier to form a composite structure has been proposed.

  When this type of reinforcement and / or repair work is on the water, that is, work structures such as bridge piers are erected on pedestals (foundations, footings) under the surface of rivers, seas, lakes, etc. If it protrudes above the surface of the water, a water cutoff wall is formed around the work structure in the shape of a surrounding wall, and the water on the inner periphery of the water cutoff wall is drained (dry up) Then, a dry work area is formed around the work structure, and reinforcement and / or repair work is performed.

  As an example of forming the cutoff water blocking wall, a structure in which a large number of sheet piles are driven and surrounded around the work structure is conceivable. However, it is difficult to adopt because there is a problem of water stoppage between the sheet piles, the sheet pile joint construction part, and between the sheet pile and the pedestal, and deformation due to water pressure and waves. Moreover, it is difficult to apply when the number of empty heads for building a seat pile is extremely small, such as a pier. In addition, when there are many joints, it is difficult to reuse the sheet pile, which is uneconomical. Furthermore, when a vibrating machine such as a vibro hammer is used to build a seat pile, there is a risk of adversely affecting the surrounding environment.

  In addition, since it is necessary to drive the seat pile into the bottom of the water, if the upper surface of the pedestal (foundation, footing) has a relatively large area, such as a bridge pier, it can be used for a wide range of deadlines to surround the entire pedestal. The water blocking wall must be formed, which increases the number of sheet piles to be driven and the range to be driven, increasing the number of man-hours, work period, and deadline, impeding the above-mentioned leakage, deformation, and river volume. There is a problem that an increase in the range to be noticeable becomes remarkable.

  Therefore, as disclosed in Patent Document 1, a work structure such as a bridge pier is opened and closed by opening and closing a plurality of vertically split halves capable of adjusting buoyancy that are connected to each other by a hinge. There is a deadening caisson that settles out of the outer casing, the lower end of the divided box is elastically contacted with the upper surface of the pedestal, and this part is filled with a water stop grout to stop the water.

  Moreover, as disclosed in Patent Document 2, a plurality of precast panels having the same configuration, which are divided along the vertical direction and the circumferential direction of the work structure and bent in an arc shape, are formed in a cylindrical shape on the work structure. There is a temporary cut-off structure in which a water-stopping mortar is filled between the lower end of the precast panel and the pedestal upper surface to stop the water.

  However, even in the deadline caisson of Patent Literature 1 and the temporary deadline structure of Patent Literature 2, water-stopping properties of the joint portion, lower end portion, and hinge portion of the divided bodies such as a plurality of divided boxes and precast panels have been established. Absent. Furthermore, when the work structure, for example, the head under the bridge pier and the surrounding water depth are not sufficiently secured, transportation, installation and removal on the water are difficult and adoption is difficult.

  In addition, the deadline caisson of Patent Document 1 has not yet been established as a control method by pouring water at the time of installation. Furthermore, the deadline caisson is heavy, and its production, transportation, installation and removal are expensive and difficult to adopt. On the other hand, the provisional deadline structure of Patent Document 2 has a complicated installation process of the seating portion, and the concrete that fixes the seating portion leaks into the water and pollutes the water quality. Furthermore, like the case of patent document 1, a steel panel becomes a heavy article, and manufacture, conveyance, installation, and removal are also expensive and difficult to employ.

  Therefore, in the case of Patent Document 3, the applicant of the present invention can close the periphery of the work structure built underwater with a simple process and high water-stopping performance without being affected by the head or water depth. We proposed a water cutoff wall for the deadline and a deadline method using it.

  According to the technique disclosed in Patent Document 3, since the divided body constituting the cutoff waterstop wall can be formed in a small size, it is easy to produce the cutoff waterstop and transport it on land and on water. At the same time, it is possible to construct a water stop wall for closing with a simple process and a simple crane or other cargo handling machine without being affected by the sky head or the water depth. In addition, the simple structure makes it possible to settle and float in the water while ensuring high water-stopping, and to easily carry, install, dismantle, and remove the divided water-proofing box on the water. Can do. In addition, when installing in water, keep the posture of the deadline box unit approximately horizontal, and after installation, make the upper surface of the deadline box unit horizontal and build a deadline wall for the deadline. Can be easily.

  In addition, by appropriately adjusting the amount of water stored in a plurality of vertical water storage systems arranged in the horizontal direction, the posture of the closing box unit in the water can be kept horizontal, so that the cover constructed in the water can be maintained. The surroundings of the work structure can be cut off with a simple process and with high water-stopping properties without being affected by the head or water depth. In addition, it is possible to easily carry, install, dismantle, and remove the divided wall body on the water.

  Furthermore, a plurality of divided water blocking boxes are connected to each other to form a ring closing box unit around the work structure, and then the closing box unit is submerged in water and seated on the pedestal. Therefore, it is possible to construct a water stop wall for a shut-off by a simple process without being affected by the empty head or water depth around the work structure.

Japanese Patent No. 2829362 JP-A-11-117315 JP 2011-26802 A

  However, although the water blocking wall body for closing and the closing method using the same of Patent Document 3 have various advantages as described above, they are still in the following points (1) to (11). There is room for improvement.

  (1) As shown in paragraph [0045] of Patent Document 3 and FIGS. 2 to 4, a plurality of divided water stop plates 43 and 44 are horizontally arranged in order to constitute the cutoff wall unit 12. However, since these are connected in a watertight manner and stacked one to several steps in a watertight manner depending on the water depth, the number of diving operations increases, and the operator's diving time is also required to be long.

  (2) Since the upper joint plate 46 and the lower joint plate 47 are each plate-shaped as described in paragraph [0046], in order to ensure water-stopping of the joint surface, water-stop packing is applied to the joint surface. Need to be inserted and tightened with bolts to be compressed, and there are many bolt fastening operations in water.

  (3) As shown in paragraph [0047] and FIG. 2, between the facing plates 48 of the respective split water stop plates 43, 44 are connected in a horizontal direction via a seal connection structure 53. For this reason, there are many connecting surfaces, and water leakage tends to occur when the water-stop packing is insufficiently attached. Moreover, there are many underwater bolt fastening operations.

  (4) As described in Paragraph [0048], the lower joint plate 47 of the divided water blocking plates 43 and 44 is used for the divided water blocking boxes 13 and 14 constituting the uppermost closing box unit 11. Since it is detachably fixed to the upper surface of the connecting member 51 having a steel frame shape and a substantially Γ-shaped cross section fixed to the outermost part on the top plate 16 through the seal coupling structure 53, the work space is reduced. It is narrow and the bolt fixing work becomes complicated.

  (5) As described in paragraph [0049], on the upper joint plate 46 of the lower split water stop plates 43, 44, the lower joint plate of the upper split water stop plates 43, 44. 47 are overlapped, and the upper and lower joining plates 46 and 47 are similarly connected via the seal connection structure 53, so that there is no support material for fixing the divided water stop plate, so that the bolt fixing work is complicated. Become.

  (6) As shown in paragraph [0050] and FIGS. 7 (A) and 7 (B), the seal connection structure between the end plates 48 of the split water stop plates 43 (44) adjacent in the horizontal direction, and The same applies to the seal connection structure between the uppermost closing box unit 11 (connection member 51) and the first-stage closing box unit 12 (the lower joint plate 47 of the divided water stop plates 43 and 44). Since it is a structure, there is no support material for fixing the divided water stop plate, so that the bolt fixing operation becomes complicated.

  (7) As described in Paragraph [0051], the joining plates 46, 47, 48, 51 face each other, the bolts 55 are inserted into the bolt holes 54, and fastened with the nuts 56. The water plates 43 and 44 and the connection member 51 are connected to each other. For this reason, there are too many bolts for connection, and work takes time.

  (8) As shown in paragraph [0052] and FIG. 7A, between the two surfaces S4 and S5 that face each other and require water stop, the two surfaces S4 are similar to the seal connection structure 30. , A non-elastic spacing member 58 that keeps the spacing between S5 at a predetermined spacing, and a sealing material 59 that is thicker and more elastic than the spacing member, and a thick and elastic sealing material that is thick in the vertical and horizontal directions. Since it is arranged side by side, it takes time to connect the bolts of the split water stop plate.

  (9) As described in paragraph [0053], the thickness t5 of the spacing member 58 is, for example, 10 mm, and the thickness t2 of the sealing material 59 is, for example, 20 mm, and t5 <t2. In this case, there is a possibility of water leakage unless the sealing material 59 is compressed more than t2-t5. In addition, an error occurs in the dimensions of the cutoff wall unit 1.

  (10) As shown in paragraph [0054] and FIG. 7B, the connecting plates 46, 47 (48, 51) are fastened with bolts 55 and nuts 56, so that the fastening work is complicated. Take time.

  (11) As shown in paragraph [0088] and FIG. 7, the connection structure 53 is fixed and water-stopped by the bolt 55 and the nut 56, so that the bolt fastening work in water increases.

  In addition to the above (1) to (11), there is room for consideration in the following points (12) to (14).

  (12) When a sufficient empty head can be secured and a cargo handling machine such as a crane can be used, there is no need for a box unit because there is no need to use a floating structure.

  (13) The diving operator puts fastening bolts and nuts in separate containers, carries them around the body, dives, and performs fastening work at predetermined locations. At this time, first align the holes of the two flanges to be fastened (that is, finely adjust the panel), take out the bolt from the bolt bag, insert the bolt into the hole, take out the nut from the nut bag and fit it into the bolt. It is necessary to repeat a series of operations of rotating and fastening for each fastening portion, and the diving work is complicated and the diving time becomes long.

  (14) Since the weight of the bolt and nut is added to the body of the submersible worker in addition to the weight for the underwater operation, the operation in the water becomes slow. Moreover, since this type of construction is carried out in the downstream of the river or near the mouth of the river, the water is often cloudy, and poor visibility is likely to occur, making it difficult to perform detailed work such as bolt hole alignment.

  Thus, the water blocking wall body for closing and the closing method using the same of Patent Document 3 which is the prior application of the applicant of the present application require complicated work and long diving time when paying attention to diving work. Since this is one factor that causes a long period of time, countermeasures are desired.

  The present invention has been made in view of such circumstances, and can be used to easily and easily assemble the cutoff wall body in the water or in the sea, and easily disassemble it after completion of the reinforcement and / or repair work. An object of the present invention is to provide a water stop wall for a cutoff line that can be simplified, simplified and shortened, and can shorten the construction period.

  In order to solve the above-mentioned problems, the water stop wall for a shutoff according to the present invention according to claim 1 is configured to cut off the periphery of a structure in water or in the sea, exclude water or seawater in the structure, and In the water stop wall for cutoff, which performs the reinforcement and / or repair work in the atmosphere, a floor base 11 of a water stop structure installed in a wall shape on a pedestal under the water surface of the structure, and the floor base 11 An internal frame having struts 16 standing upright at predetermined intervals, a water stop wall composed of a plurality of split water stop plates 19 inserted or sheathed between the struts 16, and the floor base 11 Fastening means 30 for fastening at least one between the split water stop plate 19 and between the support column 16 and the split water stop plate 19, between the floor base 11 and the split water stop plate 19, and the support column 16. Between the split water stop plate 19 It is provided with sealing materials 20-1 and 20-2 for water stop which are interposed and are compressed by the divided water stop plate 19 which has received an external pressure due to water pressure and exhibit a water stop effect. .

  The invention according to claim 2 is the water shutoff wall body according to claim 1, wherein the fastening means 30 includes a lot bolt 31a, the floor base 11, the split water stop plate 19, and the inner frame. A fixing flange 35c having a fitting 32 that is mounted on either of them and rotatably supports a hole on one end side of the lot bolt 31a, and a groove 36 in which the other end side of the lot bolt 31a is removably received. And a nut 31b for locking the other end of the lot bolt 31a to the fixing flange 35c.

  According to a third aspect of the present invention, in the shutoff water blocking wall body according to the first aspect, the fastening means 30 includes a fastening bolt 54 to be attached to the support column 16, and the fastening bolt 54 is screwed into the fastening means 54. The surface facing the sealing material 20-1 of the divided water stop plate 19 is fastened and fixed.

  According to a fourth aspect of the present invention, in the water shutoff wall body according to the first aspect, the fastening means 30 is attached to one of the floor base 11, the divided water stop plate 19, and the inner frame at one end side. And a pair of legs 51 pivotally supported by the fixture 50, a connecting member 52 for connecting these legs 51, and a screw that is screwed into the connecting member 52. And a fastening bolt 53 for pressing 49 toward the fixture 50.

  According to the first to fourth aspects of the present invention, a floor base having a water-stopping structure, an internal frame having struts erected on the floor base at predetermined intervals, and inserted or sheathed between the struts, respectively. Since the split water stop plate is tightened and tightened with the fastening means to form the water stop wall body for the shutoff, the water stop wall body for the shutoff is easily and easily assembled in water or in the sea, and the reinforcement and / or repair work is completed. It can be easily dismantled. In addition, the water structure is supported by a beam structure with an internal frame, and the divided water stop plate is pressed against the column with water pressure and fixed. Moreover, the fastening means is mounted in advance on the floor base, the internal frame or the split water stop plate, and can be tightened with a simple work, so the diving work becomes easy and short, and safety is increased. The construction period can be shortened compared to Patent Document 3 which is the prior application of the applicant.

It is a perspective view which shows schematically a part of the water stop wall body for deadlines concerning Embodiment 1 of this invention. It is a longitudinal cross-sectional view at the time of installing the water stop wall for deadlines concerning Embodiment 1 of this invention in the pier of a bridge. FIG. 3 is a cross-sectional view of a cutoff water blocking wall body taken along line III-III in FIG. 2. FIG. 4 is an enlarged vertical cross-sectional view of a water cutoff wall body for closing and an enlarged plan view of a periphery of a support column, in which an IV portion in FIG. FIG. 5 is a side view and a plan view of a cutoff water blocking wall body as viewed in the direction of arrow V in FIG. 4. FIG. 5 is a side view and a plan view of a cutoff water blocking wall body as viewed in the direction of arrow VI in FIG. 4. It is sectional drawing and a top view which show an example of a fastening metal fitting. It is an expanded sectional view of the part which installs a division | segmentation water stop plate in a support | pillar. It is an expanded sectional view and a top view of the portion which carries out tension fastening of the division water stop plate adjacent up and down. It is an expanded sectional view which shows the other structural example of the part which carries out tension fastening of the division | segmentation water stop plate adjacent up and down. It is an expanded sectional view and a top view showing other examples of composition of the portion which carries out tension fastening of the division water stop plate adjacent up and down. It is an expanded sectional view of the junction part of a floor stand and a division | segmentation water stop plate. It is an expanded sectional view which shows the other structural example of the junction part of a floor stand and a division | segmentation water stop plate. It is a longitudinal cross-sectional view at the time of installing the water stop wall for deadlines which concerns on Embodiment 2 of this invention in the pier of a bridge. FIG. 15 is a cross-sectional view of a cutoff water blocking wall body taken along line III-III in FIG. 14. It is an expanded sectional view of the part which installs the division | segmentation water stop plate in FIG. 15 in a support | pillar. It is an expanded sectional view of the part which installs the division | segmentation water stop plate in FIG. 15 in a corner support | pillar. It is an expanded sectional view which shows the other structural example of the corner part of a division | segmentation water stop plate. FIG. 9 is a cross-sectional view of a part of the cutoff water wall according to Embodiment 3 of the present invention. It is sectional drawing and a top view which show the other example of a fastener.

[Embodiment 1]
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view schematically showing a part of a cutoff water blocking wall according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view when the water cutoff wall body according to Embodiment 1 of the present invention is installed on the pier of the bridge, and FIG. 3 is a cutoff line along line III-III in FIG. It is a cross-sectional view of the water stop wall for use. In addition, this example demonstrates the case where the planar shape of the water stop wall for deadlines exhibits a rectangle.

  As shown in FIG. 2, a bridge pier 2 as a work structure to be reinforced and / or repaired using a cutoff water blocking body 1 is, for example, a reinforced concrete structure, and is embedded in the ground below the surface of the water. A plurality of foundation piles 3, a footing 4 as a pedestal formed on these foundation piles 3 and positioned below the surface of the water, and a cylinder and an elliptical column standing on the upper surface 4 a of the footing 4 and protruding above the surface of the water Or a pier portion 5 such as a prismatic shape, and an overhanging beam 6 formed at the upper end of the pier portion 5, and the upper surface of the overhanging beam 6 is provided with a floor portion such as a road or a railway via a spacing beam member 7. The pier superstructure 8 is of a general structure.

  The cutoff water blocking wall body 1 is installed on the upper surface 4a of the footing 4 in the shape of a rectangular surrounding wall with a predetermined interval around the pier part 5, and the inside water is drained to form a dry work place. Thus, various operations such as seismic reinforcement work and painting work of the peer portion 5 can be easily performed.

  The cutoff water blocking wall body 1 is composed of a floor base (or box) 11 and a cutoff wall body 12 installed on the floor base 11. The floor 11 is set substantially horizontally on the upper surface 4a of the footing 4 so as to surround the periphery of the peer portion 5 in the water or the sea around the structure. On the lower surface of the floor base 11, a seal for ensuring watertightness between the footing 4 and the floor base 11, a so-called water-stop packing or seal material (hereinafter collectively referred to as a seal material) 13, and a shut-off stop A support 14 that supports the water wall 1 is disposed.

  Further, as shown in FIG. 2 and FIG. 3, water pressure is respectively applied between the wall 12 for the shutoff and the pier portion 5 (the same applies between the floor base 11 and the pier portion 5 if necessary). Cut beams 15a and 15b for supporting are installed. Cross beams 18a and 18b are interposed between the cutting beams 15a and 15b and the cutoff wall 12. Moreover, you may interpose the cross beams 18a and 18b also between the cut beams 15a and 15b and the floor base 11 as needed. Furthermore, depending on the planar shape of the footing 4 and on-site construction conditions, the cut beam may be omitted.

  The above-mentioned floor pedestal 11 is adapted to on-site conditions in order to keep the leveling and deformation amount of the cutoff waterstop body 1 within allowable values and to ensure the structural strength and water tightness of the cutoff waterstop wall 1 as a whole. Along with the structure having the necessary rigidity, the floor base 11 itself has a water-stop structure, and its height, width, plate thickness, etc. are designed as appropriate depending on the purpose, water depth, location, such as a girder structure or box structure. Of course, a floating structure similar to that of Patent Document 3 may be used as necessary. In FIG. 3, a plurality of divided water blocking bodies 11-1, 11-2,. The floor base 11 is configured by watertightly connecting the two.

  On the other hand, the deadline wall 12 is installed on the floor base 11 and includes an internal frame composed of members such as a column 16 made of H-section steel, a corner column 17, and the cross beams 18a and 18b. It forms with the water stop wall which consists of the some division | segmentation water stop plate 19 (19-1 to 19-5) attached to an internal frame. That is, as shown in FIG. 1, columns 16 are erected vertically at the top end of the floor 11 at predetermined intervals, and a divided water stop plate 19 is inserted between the upper flange and the lower flange between the columns 16. As a result, the planar shape is assembled into a substantially circular shape, a substantially rectangular shape, or a substantially oval shape, thereby constructing the cutoff wall 12.

  The support column 16 is directly attached to the uppermost stage of the floor base 11 by welding or the like, or a connecting member is provided on the uppermost stage of the floor base 11 and attached with bolts or the like. At this time, in order to reduce the number of joints of the support column 16, it is preferable to lengthen one support column 16 within a possible range in consideration of the empty head.

  In the example shown in FIG. 3, two flanges of H-shaped steel are formed by welding or joining via a sealing material at an angle of 90 °, as shown by enclosing the corner strut 17 in a circle with a one-dot chain line. The end of the cross beam 18b is connected to these H-shaped steel joints by welding or the like.

  In addition, although the said pillar 16 is suitable for H-section steel, if it can support external forces, such as a hydraulic pressure concerning the water blocking wall body 1 for a cutoff, it does not necessarily need to stick to H-section steel. Moreover, you may make the support | pillar 16 into multiple steps | paragraphs according to conditions, such as the height of the bridge pier 2. FIG.

  As shown in FIG. 1, a sealing material 20-1 for water stop is mounted on the inner surface of the flange (H-shaped steel or the like) 16 inside the wall 12 for shutoff, and this sealing material 20- 1 is interposed between the split water stop plate 19 and the flange inner surface of the support column 16. Further, a floor base rib (floor base guide plate) 21 is provided flush with the inner surface of the flange of the support 16 at a position corresponding to the flange of the support 16 on the upper surface 11a of the floor 11. A sealing material 20-2 for water stop is also attached to the inner surface of the base rib 21. The sealing materials 20-1 and 20-2 exhibit a water stop effect by being crushed by the divided water stop plate 19 that has received an external pressure such as water pressure. Moreover, a space | interval holding member is provided as needed.

  And the said split water stop plate 19 is inserted between the upper flange and the lower flange between each support | pillar 16, and these split water stop plates 19 are fastening metal fittings (it mentions later) through the said sealing materials 20-1 and 20-2. ) And fasten and tighten the floor 11 and the column 16 respectively.

  In this way, a plurality of divided water stopping plates 19 can be arranged in the horizontal direction between the columns 16 and these can be connected in a watertight manner. This horizontal arrangement is set as one unit, and this one unit is stacked in a watertight manner on the floor 11 depending on the water depth, and the uppermost divided water blocking plate 19 (19-5 in FIG. 2). ) Set the height so that at least the upper part protrudes above the water surface.

  Thereafter, the water or seawater inside the cutoff wall 12 is drained, so that water pressure is applied from the outside of the cutoff wall 12, and the split water stop plate 19 is attached to the support column via the sealing materials 20-1 and 20-2. 16 and the floor rib 21 are pressed to stop water.

  In the cutoff wall 12 having the above-described configuration, when the divided water blocking plates 19 are inserted between the upper flanges and the lower flanges between the support columns 16, they are inserted between the H-shaped steel flanges of the support columns 16 from above. Since it is inserted, it becomes an attachment guide, and the attachment work of the divided water stop plate 19 becomes easy.

  FIG. 4A is an enlarged vertical sectional view of the cutoff water blocking wall body 1 in which the IV part of FIG. 2 is enlarged, and FIG. 4B is a plan view of the vicinity of the column of FIG. 5 (a) is a side view of the cutoff water blocking wall 1 as viewed in the direction of arrow V in FIG. 4 (a), FIG. 5 (b) is a plan view thereof, and FIG. 6 (a) is the same as FIG. ) In FIG. 6A is a side view of the cutoff wall body 1 as viewed from the arrow VI, FIG. 6B is a cross-sectional view taken along line AA in FIG. 6A, and FIG. 6C is FIG. It is a BB line arrow sectional view.

  As shown in FIG. 4, a floor base (or box) 11 is installed on the upper surface 4 a of the footing 4 via a support 14 and a sealing material 13, and a deadline wall 12 is installed on the floor base 11. ing. In this example, a pedestal (connection pedestal) 22 as a connecting member is provided on the floor pedestal 11, and the cutoff wall 12 is fixed on the connection pedestal 22 with a brace fixing fixture 23. In addition, a sealing material 26 and a spacing member 27 are installed on the joint surface between the divided water blocking plates 19 adjacent to each other in the vertical direction, and the drawing fixtures 28-1 and 28 are interposed via the sealing material 26 and the spacing member 27. -2, the divided water blocking plates 19 (19-1 to 19-5) adjacent to each other in the vertical direction are fixed. Further, each of the divided water stop plates 19 (19-1 to 19-5) is attracted and fixed to the support column 16 by the attracting fixtures 24-1, 24-2, 24-3, 24-4,. Has been.

  As shown in FIG.5 and FIG.6, each division | segmentation water stop plate 19 (19-1, 19-2, ...) exhibits a substantially rectangular shape, and is formed with a steel plate, a shape steel, etc. FIG. For example, the upper and lower surfaces, the side surfaces, and the inner and outer surfaces are composed of steel plates, and each is fixed by welding or the like. Alternatively, five surfaces having either one of the inner and outer surfaces are made of steel plates, and each is fixed by welding or the like. Moreover, the inside of the said split water stop plate 19 (19-1, 19-2, ...) is reinforced by installing a rib etc. as needed. A buoyancy structure can also be formed inside depending on design conditions.

  And in the horizontal direction, it is pulled and fixed by the pulling fixtures 24-1, 24-2, 24-3, 24-4,..., Compressed by water pressure, and stopped. On the other hand, in the vertical direction, the weight of the split water stop plate 19 and a steel member or flange as a fixture attached near the joint surface of the split water stop plates 19-1 and 19-2 are attracted to the fixing brackets 28-1 and 28. Water is stopped by pulling and tightening at -2. Thereby, the number of fasteners can be reduced, and the work time (submersible time) in water can be reduced. In addition, by increasing the height per step of the split water stop plates 19-1 and 19-2 and reducing the horizontal joint surface, it is possible to shorten the water leakage and underwater work time (submersible work), but manufacture and transport It should be set in consideration of construction, dismantling, etc.

  The sealing material 26 is made of a material that can be compressed by t2−t5 or more with a compressive force such as water pressure when the thickness of the spacing member 27 is t5 and the thickness of the sealing material 26 is t2. By installing the holding member 27, the sealing material 26 is uniformly compressed to reduce water leakage, and the shape and dimension of the cutoff wall 12 can be secured.

  In addition, in the joint surface between the support | pillar 16 and the division | segmentation water stop plate 19, and each division | segmentation water stop plate 19, when the water can be stopped even if there is no space | interval holding member 27, you may remove. Further, when there is no restriction on the empty head, the split water stop plate 19 is sequentially inserted between the columns 16 and installed on the connection base 22 having the seating portion and the interval holding member 27 by using a cargo handling machine such as a crane. Therefore, workability can be improved.

  7 (a) and 7 (b), respectively, a heel mounting fixture 23 for tightening and fastening between the floor 11 and the divided water stop plate 19 shown in FIGS. 4 to 6 and between the column 16 and the divided water stop plate 19 respectively. , And pulling fixing brackets 28-1, 24-2, 24-3, 24-4,... It is sectional drawing and a top view which show the structural example of 28-2.

  In the present example, these fastening fixtures (hereinafter referred to as fastening fixtures) 30 are formed of fasteners 31, fixtures 32, and fixtures 35. For the fastener 31, for example, a lot bolt 31a, a nut 31b, and a washer 31c are used. The lot bolt 31a is a bolt in which a circular perforated ring material is integrally formed at the tip of the bolt. The lot bolt 31a can be made of various materials such as steel, stainless steel, cast steel, glass fiber reinforced plastic, and a combination of carbon fiber and plastic. In addition, the shape of the ring material may be a donut shape, a rectangular shape, a horseshoe shape, or the like.

  The attachment 32 attaches the lot bolt 31 a to the divided water stop plate 19, the floor base 11, and the support column 16. The fixture 32 includes a mounting plate 33a, a bearing 33b projecting from the mounting plate 33a, and a support shaft (for example, a bolt) inserted into a rotating wheel (a hollow cylindrical hardware) 33c provided on the bearing 33b. 34a and nut 34b) 33d. The thickness of the mounting plate 33a and the bearing 33b is determined by the tightening force of the lot bolt 31a and the nut 31b, and reinforcing ribs may be provided as necessary.

  The lot bolt 31a is rotatably supported at its one end by a support shaft 33d. A nut 31b is screwed in advance through the washer 31c to the other end of the lot bolt 31a. Then, the lot bolt 31a is laid down on the mounting plate 33a side, and is raised at the time of fastening, and is fixed at a position corresponding to the floor base 11, the divided water stop plate 19, or the internal frame (not shown). ), And the nut 31b is screwed in the tightening direction via the washer 31c to be tightened.

  FIG. 8 is an enlarged cross-sectional view of a portion (corresponding to the periphery of the pulling fixtures 24-1, 24-2, 24-3, 24-4,...) Where the divided water stop plate 19 is installed on the support column 16. There is shown a state in which the split water stop plate 19 is installed on the support column 16 by using the fastener 30 shown in FIG. In this example, the fixing device 35 includes a fixing plate 35a installed on one flange of the support column 16, a reinforcing plate 35b for reinforcing the fixing plate 35a, and a fixing flange 35c for fixing the lot bolt 31a in an upright state. ing. The fixing flange 35c is formed with, for example, a semi-oval groove 36 in which the other end of the lot bolt 31a is removably accommodated. Then, the lot bolt 31a is turned upright from the lying state, fitted into the groove 36 of the fixing flange 35c, and tightened by screwing the nut 31b through the washer 31c so as to be tightened. Therefore, the workability is much better than the conventional one, and it is particularly suitable for work in water.

  9 (a) and 9 (b) respectively correspond to the portions for tightening and fastening the divided water blocking plates 19-1 and 19-2 adjacent to each other in the vertical direction (the periphery of the pulling fixtures 28-1 and 28-2). FIG. In this example, the fasteners 30-1 and 30-2 are attached to both sides of the divided water stop plates 19-1 and 19-2 and in the vicinity of the upper end of the lower divided water stop plate 19-1. Then, the lot bolts 31a-1 and 30a-2 of the fastening brackets 30-1 and 30-2 are received at the upper end of the lower split water stop plate 19-1 and the lower end of the upper split water stop plate 19-2. Fixing flanges 37-1 and 37-2 are attached as fixtures to be fixed.

  That is, one end of the lot bolts 31a-1 and 31a-2 is pivotally attached to the lower split water stop plate 19-1, and the upper split water stop plate 19-2 and the lower split water stop plate 19 are mounted. Fixed flanges 37-1 and 37-2 are provided at the joints with −1. The fixing flanges 37-1 and 37-2 are provided with semi-oval grooves 38-1 and 38-2 for receiving the lot bolts 31a-1 and 31a-2 as shown in FIG. 9B. The other ends of the lot bolts 31a-1 and 31a-2 are accommodated in a detachable manner.

  Then, when the upper and lower divided water stop plates 19-1 and 19-2 are installed at appropriate positions, the lot bolts 31a-1 and 31a-2 which are in a downward state are rotated downward to fall upward. The nuts 31c-1 and 31c are fitted with the semi-ellipse grooves 38-1 and 38-2 of the fixing flange of the upper divided water blocking plate 19-2 and screwed in advance. Tighten through -2. At this time, the upper and lower divided water stop plates 19-1 and 19-2 can be positioned by the fixing flanges 37-1 and 37-2.

  FIG. 10 is an enlarged cross-sectional view showing another configuration example of the portion for tightening and fastening the divided water stop plates 19-1 and 19-2 adjacent to each other in the vertical direction. In this example, the joint surfaces of the divided water blocking plates 19-1 and 19-2 are so-called staggered so that the joint surfaces are fitted to each other, and the sealing material 26 and the spacing member 27 are interposed on the joint surfaces. is there. Since the structure of the fasteners 30-1 and 30-2 is the same as that of FIG. 9, the same reference numerals are given to the same portions, and detailed descriptions thereof are omitted.

  According to such a configuration, the water stoppage can be increased using an external pressure such as a water pressure as compared with the structure shown in FIG. That is, when an external pressure such as a water pressure is applied to the divided water stop plate 19-2, the seal material 26 is crushed and water stoppage is exhibited. Of course, other fitting structures or the like are not limited to the phase gap.

  FIGS. 11A and 11B are an enlarged cross-sectional view and a plan view showing still another configuration example of a portion for tightening and fastening the divided water blocking plates 19-1 and 19-2 adjacent to each other in the vertical direction. In the example shown in FIG. 9, the lot bolts 31a-1 and 31a-2 stand up and turn into the lying state, but turn along the surfaces of the divided water blocking plates 19-1 and 19-2. It has become. In other words, in the example shown in FIG. 9, the rotating shafts of the lot bolts 31 a-1 and 31 a-2 are parallel to the surfaces of the divided water blocking plates 19-1 and 19-2, whereas the divided water blocking is performed. The direction is perpendicular to the surfaces of the plates 19-1 and 19-2. Even in such a configuration, only the rotation direction is different, and substantially the same operation effect as the example shown in FIG. 9 can be obtained.

  Considering the tightening of the nuts 31b-1 and 31b-2 in the diving operation, the rotation direction of the lot bolts 31a-1 and 31a-2 is upward or horizontal as shown in FIGS. Although it is suitable, it can also be turned down and fastened.

  FIG. 12 is an enlarged cross-sectional view of a joint portion (corresponding to the periphery of the heel-fixing fixtures 23-1 and 23-2) between the floor base 11 and the divided water stop plate 19-1. In this example, the case where the divided water blocking plate 19-1 is directly installed on the upper surface 11 a of the floor base 11 without using the connection frame 22 is shown, but the divided water blocking plate 19-1 is mounted on the connection frame 22. The same applies to the installation. In other words, the fastening fitting 30 that works as a fixing fitting for wearing a horizontal gutter is attached to the lower end of the lowermost split water stop plate 19-1 so as to be freely supported.

  On the other hand, on the upper surface 11a of the floor base 11, for example, a fixture 39 in which a semi-oval groove 36 is formed is fixed by welding or bolts. Then, a lot bolt 31a-1 as a fastening member 30 is inserted and locked into the groove 36 to the fixing tool 39, and a nut 31b-1 mounted in advance is screwed through a washer 31c-1. The divided water stop plate 19-1 is pulled and fixed to the floor guide plate 21.

  Further, the fixture 32 for attaching the divided water blocking plate 19-1 is fixed to the outside water side of the upper surface 11a of the floor base 11 by welding or the like, and is fixed to the corresponding lower divided water blocking plate 19-1. 35 is attached. As the fixture 35, a fixing flange for receiving the lot bolt 31a-2 pivotally supported by the fixture 32 is used. Then, a lot bolt 31a-2 as a fastening member 30 is inserted and locked into the groove to the fixing member 35, and a nut 31b-2 mounted in advance is screwed in via a washer 31c-2. The water stop plate 19-1 is pulled to the floor base 11 and fixed.

  FIG. 13 is an enlarged cross-sectional view illustrating another configuration example of the joint between the floor base 11 and the divided water stop plate 19-1. In this example, the lowermost divided water stop plate 19-1 is fixed on the floor base 11 using the fastening metal fitting 30 that functions as the anchoring fittings 23-1, 23-2, and is installed on the floor base 11. Fasteners 30 are attached to both sides of the divided water stop plate 19-1.

  A fixture 32 for attaching the divided water stop plate 19-1 is fixed to the floor 11 by welding or the like, and a fixture 35 is attached to the corresponding lower divided water stop plate 19-1. As the fixture 35, a fixing flange that receives the lot bolt 31 a pivotally supported by the fixture 32 is used. Other configurations are the same as those in FIG.

  In the water blocking wall body for a shutoff having the above-described configuration, a floor base 11 having a water stopping structure, an internal frame having pillars 16 erected on the floor base 11 at a predetermined interval, and between the pillars 16 are provided. Since each of the divided water blocking plates 19-1 to be inserted is tightened and fastened with the fastening bracket 30 to constitute the water cutoff wall body 1 for the cutoff, the water cutoff wall body 1 for the cutoff is easily and easily put in water or in the sea. It can be easily disassembled once the assembly, reinforcement and / or repair work is complete. Moreover, water pressure is supported by the beam structure by the internal frame, and the divided water stop plate 19-1 is pressed against the support column with water pressure and fixed. Moreover, the fastening bracket 30 is composed of a fixture 32, a fastener 31 and a fixture 35, and is mounted in advance on the floor base 11, the internal frame or the divided water stop plate 19-1, and can be tightened and tightened by a simple operation. Since the diving work is easy and short, and the safety is enhanced, the construction period can be shortened as compared with Patent Document 3 which is the prior application of the present applicant.

  Next, an example of the work procedure of the closing method using the above-described water stop wall 1 for closing is schematically described. The floor base (or box) 11, the internal frame, and the divided water stop plate 19 are manufactured in advance in a factory (which may be a land near the pier 2 as a work structure).

  When the footing 4 of the pier 2 is buried in the ground at the bottom of the water, the ground is excavated until at least the upper surface 4a of the footing 4 is exposed in the water.

  Next, the floor base 11 is formed into an assembly frame shape. Then, the floor 11 is horizontally laid on the upper surface 4a of the footing 4. The steps up to here can be performed in the same manner as in Patent Document 3, which is the prior application of the present applicant.

  After that, the column 16 is erected on the upper surface 11a of the floor 11 that has been laid down or on the connection base 22 that is installed on the floor 11 by a method such as welding or bolt fastening. At this time, the support columns 16 may have a plurality of stages depending on conditions such as the height of the pier 2. Then, after installing the cross beams 18a and 18b, the beams 15a and 15b are installed. The installation of the cross beams 18a and 18b and the beams 15a and 15b may be performed until the internal water is drained depending on conditions such as tidal currents.

  Next, the split water stop plate 19 is inserted between the support columns 16. Then, each time the upper and lower divided water stop plates 19-1, 19-2,... Are stacked, the fastening brackets 30 as the pulling fixing brackets 28-1, 28-2 for fastening the upper and lower sides are tightened up and down. The split water stop plates 19-1, 19-2, ... are fastened.

  Thereafter, the fastening fitting 30 as the anchoring fitting 23-1 is fastened, and the lowermost divided water stop plate 19-1 is brought into close contact with the floor pedestal rib 21 and fixed. Next, the fastening brackets 30 as the pulling fixtures 24-1, 24-2, and 24-3 of the columns 16 and the corner columns 17 and the divided water blocking plate 19-1 are tightened to ensure water tightness. Further, the fastening operation sequence shown above for the pulling fixing brackets 28-1, 28-2, the heel-fixing fixing bracket 23, and the pulling fixing brackets 24-1, 24-2, 24-3 is appropriately determined according to the field conditions. It may be repeated, such as changing or gradually tightening each.

  Next, the split water stop plate 19 is moved slightly horizontally and brought into close contact with the support column 16. Between the divided water stop plates 19, watertightness is ensured by the interval holding member 27 and the sealing material 26.

  In addition, although the lowermost heel mounting fixture 23-1 is not particularly required, it is safer, more reliable and more suitable than tightening with only the pull fixtures 24-1, 24-2, 24-3. .

  Next, the water or seawater inside the cutoff water blocking wall 1 is drained. When the internal water is removed, the divided water stop plate 19 is pressed against the support 16 by the external water pressure, and the water tightness is ensured by the sealing materials 20-1 and 20-2.

  Finally, the split water stop plate 19 is pressed against the support 16 by the external water pressure and deforms, so that the nuts of the pulling fixing brackets 24-1, 24-2, 24-3, 24-4,. .

  According to the closing method according to the present invention, the split water stop plate 19 can be built in a state in which the lot bolt 31a of the fastening bracket 30 is laid down, so that the split water stop plate 19 can be easily installed in water. . By tightening with special fasteners (fixing brackets for split water blocking plates) in this way, bolt and nut fastening operations such as bolt hole alignment, bolt insertion, nut installation, and nut tightening are eliminated, and the nut of the lot bolt 31a Since it is possible to simplify the operation of rotating 31b and fastening it to the fixture, it is possible to shorten the diving work time in water. In this way, the work contents are changed and the work is simplified, and improvement of work safety and shortening of the work period can be expected.

  Further, the diving operator only needs to carry the nut rotating jig without carrying the bolts and nuts, which is lighter than the technique of Patent Document 3 as the prior application, and the workability is further improved. This can contribute to shortening the construction period. Moreover, since the fastening metal fitting is used also when the water blocking wall is fixed to the floor base 11, adjustment work for fastening and horizontal drawing is simplified.

[Embodiment 2]
FIG. 14 is a longitudinal sectional view when the cutoff water wall according to Embodiment 2 of the present invention is installed on a bridge pier, and FIG. 15 is a cutoff stop along the line III-III in FIG. FIG. 6 is a cross-sectional view illustrating another configuration example of the water wall body 1. The second embodiment is different from the first embodiment described above in that the divided water blocking plate 19 is installed on the outside water side of the support column (H-shaped steel or the like) 16. 14 and 15, the same components as those in FIGS. 2 and 3 are denoted by the same reference numerals, and detailed description thereof is omitted.

  That is, as shown in FIGS. 14 and 15, the cutting beams 15 a and 15 b for supporting the water pressure are installed between the fastening wall 12 and the peer portion 5 with the cross beams 18 a and 18 b interposed therebetween, respectively. Yes. Moreover, you may install the cut beams 15a and 15b between the floor base 11 and the peer part 5 as needed. The floor base 11 has a water stop structure, and can be appropriately changed in design according to the use, water depth, and location, such as a girder structure and a box structure, as in the first embodiment.

  A sealing material 20-1 for water stop is attached to the outer surface of the flange on the outside water side of the column (H-shaped steel or the like) 16 inside the wall 12 for shutoff, and the divided water blocking plate 19 and the column 16 are attached. Between the outer surface of the flange. A floor rib (floor guide plate) is provided flush with the flange outer surface of the column 16 at a position corresponding to the flange outer surface of the column 16 on the upper surface 11a of the floor platform 11. A sealing material for water stoppage is also attached to the inner surface of the base rib. The water blocking wall formed by these divided water blocking plates 19 can be made of a continuous beam structure with the column 16 as a fulcrum, thereby reducing the cross-sectional force and deflection and saving material. However, a simple beam structure supported by two struts 16 may be used depending on conditions such as when the water depth is shallow or the area of the pier portion 5 is small.

  And the said split water stop plate 19 is tension-fastened to the floor base 11 and the support | pillar 16 with the fastening bracket 30 mentioned above via the said sealing material 20-1, and it divides | segments with the floor base 11 or the support | pillar 16 by compressing with water pressure. Water is stopped between the water stop plates 19.

  That is, the divided water stop plate 19 is disposed on the outside water between the columns 16, and the divided water stop plate 19 is tensioned and fastened to the floor 11 and the column 16 with the fastening brackets, By draining the inner water or seawater, water pressure is applied from the outside of the wall 12 for cutoff, and the split water stop plate 19 is pressure-bonded to the column 16 and the floor base rib.

  In this way, a plurality of divided water stopping plates 19 can be arranged in the horizontal direction between the columns 16 and these can be connected in a watertight manner. This horizontal arrangement is used as one unit, and this unit is stacked in a watertight manner on the floor 11 depending on the water depth. At least the upper part of the uppermost divided water blocking plate 19 is on the water surface. Set the height so that it protrudes.

  FIG. 16 is an enlarged cross-sectional view of the part where the split water stop plate 19 is installed in the support column 16 in the horizontal direction. Two split water stop plates 19 that are horizontally adjacent to each other are installed on the outer surface of the flange 16 on the outside water side of the column 16 made of H-shaped steel or the like, with the vertical guide plate 45 interposed therebetween. And the exterior. Sealing materials 20-1 and 20-1 are interposed between the divided water stop plate 19 and the column 16. 7 is fastened and fixed to a fixed flange 46 installed on the outer surface of the flange 16 by welding or the like. The fixing flange 46 is provided with a semi-oval groove so that the other end of the lot bolt is detachably accommodated. Here, the lot bolt may be directly fixed to the flange of the support column 16 without providing the fixing flange 46.

  FIG. 17 is an enlarged cross-sectional view of a portion where the split water stop plate 19 is installed on the corner post 17. The corner strut 17 is formed of a hollow and prismatic steel material in this example, and a guide plate (corner guide) 40 is provided at a joint portion of the divided water stop plate 19, and fixed flanges 42-1, 42-2. Is provided in the vicinity of the corner of the corner post 17. Sealing materials 20-1 and 20-1 are interposed between the split water stop plate 19 and the corner column 17.

  Then, the lot bolts 31a-1 and 31a-2 are turned upright from the state where they are lying on the side of the split water stop plate 19, and are fitted into the grooves 43-1 and 43-2 of the fixing flanges 42-1 and 42-2. Then, the nuts 31b-1 and 31b-2 that are mounted in advance are tightened by screwing in the tightening direction via the washers 31c-1 and 31c-2.

  When the tip of the lot bolt 31a-1 or the nut 31b-1 which is a fixing bracket for fixing the divided water stop plate 19 to the corner post 17 interferes with the tip of the lot bolt 31a-2 or the nut 31b-2 It is necessary not to install in the same plane with respect to the vertical axis. However, if they do not interfere, they may be on the same plane.

  Further, the split water stop plate 19 having a substantially rectangular plane shape includes a special shape such as a corner split water stop plate 19a as shown in FIG. 18 (a) and an arc as shown in FIG. 18 (b). By using the split water stop plate 19b, it is preferable to assemble all the columns using the columns 16 without using the corner columns 17, and the present invention can be applied to the first and third embodiments.

  The water blocking wall is spanned between the plurality of support columns 16 so that stress can be calculated as a continuous beam, and members can be saved, so that resources can be effectively used. Of course, a beam structure between the columns 16 is also possible. In addition, even when the sky head from the water surface to the bridge pier overhang is small, the split water stop plate 19 can be installed from a substantially horizontal direction, so that the work can be performed.

  Since the split water blocking plate 19 constituting the cutoff water blocking wall body 1 can be formed in a small size, this member can be easily transported on land or on the water, and at the same time, even when there are few empty heads such as piers or when the water depth is shallow It can be easily transported to the set-up position, so that it is possible to construct the cutoff wall body 1 for the shutoff with a simple process and a simple crane or other cargo handling machine, and the construction period can be shortened remarkably. it can.

[Embodiment 3]
FIG. 19 is a partial cross-sectional view of the cutoff water blocking wall 1 according to Embodiment 3 of the present invention. In the third embodiment, the split water stop plate 19 is installed between the upper and lower flanges of the column 16 made of H-section steel or the like as in the first embodiment, and the female screw provided on the flange of the H-section steel is used. The bolt hole which fastened the nut to the threaded hole or the hole provided in the flange is used and fastened. Since other basic configurations and construction methods are the same as those in the first embodiment, detailed description thereof is omitted.

  That is, the end of the divided water blocking plate 19 is inserted into the inner surface of one flange of the support column 16 via the sealing material 20-1, and the surface of the divided water blocking plate 19 that faces the sealing material 20-1. Are tightened with fastening bolts 54. By screwing the fastening bolt 54 into the threaded hole or the bolt hole fastened with the nut, the divided water stop plate 19 is pressed and fixed in the direction of compressing the sealing material 20-1. Reference numeral 47 denotes a reinforcing rib of the split water stop plate 19.

  Even with such a configuration, the same effects as those of the first embodiment can be obtained. Moreover, the diving operator carries the fastening bolt and the nut by screwing the fastening bolt 54 into the threaded hole of the female screw provided on the flange of the H-shaped steel or the bolt hole fastened with the nut in advance. There is no need and only a fastening operation is required.

  In the first to third embodiments, the case where a lot bolt or a bolt is used as the fastening bracket has been described as an example. However, the member is not limited to the lot bolt or the bolt as long as it is a member intended for fastening. 20A and 20B are a cross-sectional view and a plan view showing another configuration example of the fastener. The fastener 30 includes a fastener 48, a fixture 49, and an attachment 50. The fastener 48 has a pair of legs 51 pivotally supported at one end by the fixture 50, a connecting member 52 that connects these legs 51, and is screwed into the connecting member 52. The fastening bolt 53 is configured to be pressed toward the fixture 50.

  In the configuration as described above, when the fastening bolt 53 is tightened toward the fixture 49, the leg portion 51 and the fixture 50 are pulled through the connecting member 52. Thereby, the same fastening as a lot bolt can be performed. In addition, as other fastening means, a fastener such as a buckle that is pivotally supported on a travel bag, a fastener, and a fixture integrated with the bag body, and a simple device that has been devised in many cases. It is also preferable to use a joint.

  In addition, the shape of the water stop wall body for closing and each part which comprises this is not restricted to what was described in the said Embodiment 1-3, You may make it a different shape. Moreover, the water cutoff wall body for a cutoff according to the present invention and the cutoff method using the same may be applied not only to the pier part of the pier but also to other structures built underwater or underground. is there.

DESCRIPTION OF SYMBOLS 1 Water cutoff wall body 2 Pier pier 3 Foundation pile 4 Footing 4a Upper surface of footing 5 Pier part 6 Overhanging beam 7 Spacing beam member 8 Bridge pier superstructure 11 Floor base (or box)
11-1, 11-2,... Divided water blocking body 11 a Upper surface 12 of floor base 12 Wall 13 for shut-off 13 Sealing material 14 Bearings 15 a and 15 b Cutting beam 16 Post (H-shaped steel etc.)
17 corner struts 18a, 18b cross girders 19, 19-1, 19-2, ... split water stop plate 19a split water stop plate 19b at the corner including a circular arc, etc. Special shaped split water stop plates 20-1, 20-2 Seal material 21 Floor base rib (Floor guide plate)
22 connection mounts 23-1, 23-2 Fixing brackets (fastening means)
24-1, 24-2, 24-3, 24-4, ... Fixing bracket for drawing (fastening means)
26 Seal material 27 Spacing member 28-1, 28-2 Fixing bracket for drawing (fastening means)
30, 30-1, 30-2 Fastening bracket (fastening means)
31 Fastener 31a, 31a-1, 31a-2 Lot bolt 31b, 31b-1, 31b-2, 31b-3, 31b-4 Nut 31c, 31c-1, 31c-2, 31c-3, 31c-4 Washer (Washer)
32 Mounting tool 33a Mounting plate 33b Bearing 33c Rotating wheel (Hollow cylindrical hardware)
33d Support shaft 34a Bolt 34b Nut 35 Fixing tool 35a Fixing plate 35b Reinforcement plate 35c Fixing flange 36 Groove 37-1, 37-2 Fixing flange 38-1, 38-2 Semi-ellipse groove 39 Fixing tool 40 Guide plate (corner guide)
41-1, 41-2 Fixing tool 42-1, 42-2 Fixing flange 43-1, 43-2 Groove 44-1, 44-2 Fixing tool 45 Vertical guide plate 46 Fixing flange 47 Reinforcement rib 48 Fastening tool 49 Fixing Tool 50 Mounting tool 51 Leg 52 Connecting member 53 Fastening bolt 54 Fastening bolt

Claims (4)

In the still water wall for cutoff, which cuts off the periphery of the structure in water or in the sea, excludes the water or sea water inside the structure, and performs the reinforcement and / or repair work of the structure in the atmosphere,
A water-stop base (11) installed in a wall shape on a pedestal under the water surface of the structure;
An internal frame having columns (16) erected at predetermined intervals on the floor (11);
A water blocking wall composed of a plurality of divided water blocking plates (19) inserted or sheathed between the columns (16),
Fastening means (30) for fastening at least one of the floor (11) and the divided water stop plate (19) and between the column (16) and the divided water stop plate (19);
The divided water stop plate (external pressure caused by water pressure) interposed between the floor (11) and the divided water stop plate (19) and between the support column (16) and the divided water stop plate (19). 19) A water blocking wall body for shutoff, comprising: a water sealing material (20-1, 20-2) that exhibits a water blocking effect when compressed by 19).   The fastening means (30) is attached to any one of the lot bolt (31a), the floor base (11), the divided water stop plate (19), and the inner frame, and one end of the lot bolt (31a). A fixture (32) for pivotally supporting the hole on the side, a fixing flange (35c) having a groove (36) in which the other end of the lot bolt (31a) is removably accommodated, and the lot The water stop wall for a shutoff according to claim 1, further comprising a nut (31b) for locking the other end of the bolt (31a) to the fixing flange (35c).   The fastening means (30) includes a fastening bolt (54) to be attached to the support column (16), and the sealing material (20-) of the split water stop plate (19) by screwing the fastening bolt (54). The waterstop wall for shutoff according to claim 1, wherein the surface facing 1) is fastened and fixed. One end of the fastening means (30) is attached to any of the floor base (11), the split water stop plate (19), and the inner frame, and the attachment (50). A pair of leg portions (51) pivotally supported by each other, a connecting member (52) for connecting these leg portions (51), and a fastener (49) screwed into the connecting member (52). The waterstop wall for a shutoff according to claim 1, further comprising a tightening bolt (53) that presses the mount toward the fitting (50).

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