Water cutoff wall and construction method of water cutoff wall

Abstract

To provide a water cutoff wall which can be constructed by smoothly and rationally connecting a support pillar and a water cutoff panel while a securing water cutoff property, which has an excellent construction property and economical efficiency, which can be constructed by manpower without using concrete even in a place where construction conditions are harsh, and which has excellent simplicity, and to provide a construction method of the water cutoff wall.SOLUTION: A water cutoff wall 10 has a foundation 1, support pillars 2 raised on the foundation 1, and a water cutoff panel 3 provided between the support pillars 2, and the water cutoff panel 3 includes vertical flanges 31 at left and right end parts, and the vertical flanges 31 of the adjacent water cutoff panels 3 are connected by bolt joining means 4 via the support pillars 2. Each of the support pillars 2 is a groove-shaped member or a square steel pipe including a web part 21 and a flange part 22. The water cutoff panel 3 is a steel plate such as a liner plate or the like.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention belongs to the technical field of waterstop walls having a foundation, pillars erected on the foundation, and waterstop panels provided between the pillars, and more particularly to a waterstop wall and a construction method for waterstop walls that can be easily constructed even in places where there is a risk of flooding, particularly in places with severe construction conditions such as narrow places, places close to structures, places with height restrictions such as under elevated girders, and soft ground. [Background technology]

[0002] 2. Description of the Related Art Various water stop walls having a foundation, posts erected on the foundation, and a water stop panel provided between the posts, or similar water stop structures have been disclosed, for example, in Patent Documents 1 to 4.

[0003] Patent Document 1 discloses a portable embankment having a foundation (a box-shaped steel formwork 31 with a bottom), supports (a pair of steel frame members 41, 41 with a U-shaped cross section integrated back-to-back) erected on the foundation, and a water-stop panel (a wall panel 5 made of a synthetic resin plate material) installed between the supports. Focusing on the water-stopping structure between the support and the water-stopping panel in Patent Document 1, as shown in Figures 4, 8, etc., a technology is introduced in which both left and right ends of the water-stopping panel (wall panel 5) fitted into the groove 4a of the support (frame material 41) are waterproofed by using elastic materials (rubber stoppers 10 and water-stopping rubber 51) (see paragraph

[0021] of the specification, etc.).

[0004] Patent Document 2 discloses a waterproof panel fence having a foundation (such as a concrete foundation G), supports (H-shaped steel 21 equipped with vertical water-stopping material 22 and retaining brackets 23) erected on the foundation, and water-stopping panels (water-resistant panel units 3 made by stacking horizontally long metal square pipes) provided between the supports. Focusing on the water-stopping structure between the pillars and the water-stopping panel in Patent Document 2, a technology has been introduced in which both left and right ends of the water-stopping panel (waterproof panel unit 3) fitted into the groove of the pillar (H-shaped steel 21) are waterproofed by using an elastic material (the vertical water-stopping material 22) (see paragraph

[0029] of the specification, etc.).

[0005] Patent document 3 discloses a portable overflow prevention device having a foundation (post hole 10), a support pillar (support pile 21 consisting of a pair of steel support pile pieces 21a, 21a with a U-shaped cross section integrated back to back) erected on the foundation, and a water stop panel (cross sheet pile 22) installed between the support pillars. Focusing on the water-stopping structure between the support pillars and the water-stopping panel in Patent Document 3, a technology is introduced in which both left and right ends of the water-stopping panel (cross sheet pile 22) fitted into the groove of the support pillar (parent pile 21) are waterproofed by using an elastic material (rubber gasket 25) (see paragraph

[0022] of the specification, etc.).

[0006] Patent Document 4 discloses a waterproof protective fence having a foundation (concrete foundation block 11), pillars (metal square pipes 16) erected on the foundation, and water-stopping panels (fixed dam plate 17a with a corrugated cross section and movable dam plate 17b) provided between the pillars. Focusing on the water-stopping structure between the support and water-stopping panel in Patent Document 4, a technology is introduced in which a fixed dam plate 17a with a corrugated cross-section, which is one of the water-stopping panels, is fixed to a support member 16b made of an angle bar which is attached by welding in the vertical direction on both sides of the support (metal square pipe 16) with bolts via a gasket (not shown), and a gasket 20 is attached around the movable dam plate 17b with a corrugated cross-section (i.e., at each contact surface with the support member 16b, the fixed dam plate 17a and the step 15) to achieve water-stopping (see paragraphs

[0010] ,

[0011] , etc. of the specification). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2014-203830 A [Patent Document 2] JP 2012-180857 A [Patent Document 3] JP 2011-047150 A [Patent Document 4] JP 2001-182027 A Summary of the Invention [Problem to be solved by the invention]

[0008] The above Patent Documents 1 to 3 have in common that a waterproof structure is constructed by fitting both left and right ends of a waterstop panel (wall panel 5, waterproof panel unit 3, cross sheet pile 22) into a groove in a support (frame material 41, H-shaped steel 21, parent pile 21). Such a waterproof structure is realized by sealing the gap formed between the flange part of the support and the waterstop panel with an elastic material (waterstop rubber 51, vertical waterstop material 22, rubber packing 25) or by using a packing or filler in combination as necessary. In Patent Document 4, although elastic material is not used, water is prevented by interposing a gasket over the entire vertical length between the water-stopping panel (fixed dam plate 17a with a corrugated cross section and movable dam plate 17b) and the support material 16b of the pillar.

[0009] Therefore, in the water-stopping structures of Patent Documents 1 to 4, when connecting the support pillars and the water-stopping panel while ensuring water-stopping properties, the installation of elastic materials and gaskets is very time-consuming, and it is not possible to easily construct a water-stopping wall. Furthermore, in locations where the construction conditions are severe, normal pile foundation construction using concrete is often not feasible, and there has been a problem in that it is difficult to construct pile foundations to realize the water-stopping structures described in Patent Documents 1 to 4.

[0010] Therefore, the present invention has been devised in consideration of the problems in the background art described above, and an object of the present invention is to provide a water-stopping wall and a construction method for a water-stopping wall that are excellent in workability and economy, in which the supports and water-stopping panels can be smoothly and rationally connected while ensuring water-stopping properties. Another object of the present invention is to provide a water cutoff wall and a construction method thereof which are excellent in simplicity and can be constructed by hand without using concrete even in places where the construction conditions are severe. [Means for solving the problem]

[0011] As a means for solving the above problems, the water blocking wall according to the invention described in claim 1 is a water blocking wall having a foundation, a support pillar erected on the foundation, and a water blocking panel provided between the support pillars, The waterstop panel is characterized in that it has vertical flanges at its left and right ends, and the vertical flanges of adjacent waterstop panels are connected to each other by bolt joint means via the supports.

[0012] The invention described in claim 2 is characterized in that, in the water blocking wall described in claim 1, the support pillar is a channel-shaped member having a web portion and a flange portion, or a square steel pipe.

[0013] The invention described in claim 3 is characterized in that, in the water blocking wall described in claim 1, the support pillar is an H-shaped steel, I-shaped steel, C-shaped steel, angle steel, or a steel material formed by integrating the webs of two C-shaped steel pieces back to back.

[0014] The invention recited in claim 4 is the waterstop wall recited in claim 1, characterized in that the waterstop panel has horizontal flanges at its upper and lower ends.

[0015] The invention described in claim 5 is characterized in that, in the water stopping wall described in claim 1, the water stopping panel is a liner plate, a corrugated plate, a deck plate, a keystone plate, or a plank plate.

[0016] The invention described in claim 6 is characterized in that, in the water-stopping wall described in any one of claims 1 to 5, the foundation is a metal foundation pile equipped with a sheath tube portion capable of receiving the foot of the support.

[0017] The invention described in claim 7 provides a method for constructing a water cutoff wall having a foundation, a support erected on the foundation, and a water cutoff panel provided between the support, comprising: The waterstop panel has vertical flanges at its left and right ends, and a waterstop wall is constructed by repeatedly performing a process of connecting the vertical flanges of adjacent waterstop panels via the supports using bolt fastening means in the extension direction of the panels. Effect of the Invention

[0018] The water cut-off wall and the construction method for constructing the water cut-off wall according to the present invention have the following advantages. (1) Adjacent waterstop panels can be connected by bolting (jointing) through the support, which is very rational. In addition, if packing material is placed between the support (web part) and the waterstop panel (vertical flange) and bolted (jointed), a connection structure that fully maintains waterstop performance can be realized at the same time, which is also very rational. (2) The foundation, supports, and water-stop panels can be made from prefabricated products, such as cast iron foundation piles, H-shaped steel beams, and liner plates, respectively, making it possible to construct a water-stop wall economically and rationally. (3) The foundation, supports, and waterproof panels are so light that they can be constructed by hand and can be built without using concrete, making them easy to construct and economical. (4) As mentioned above, the materials that make up the water cutoff wall are lightweight enough to be constructed by hand, and therefore, when replacement of materials is required due to damage, restoration work can be carried out quickly, making the construction easy to maintain. In addition, when the materials are prefabricated, procurement of the materials can be carried out smoothly, making restoration work faster and more economical. (5) Because construction can be done by human labor, water cut-off walls can be easily constructed in places where construction conditions were previously difficult, such as narrow spaces, places close to structures, places with height restrictions such as under elevated girders, and soft ground. [Brief description of the drawings]

[0019] [Figure 1] FIG. 2A is a vertical sectional view showing an embodiment of a water blocking wall according to the present invention, FIG. 2B is a plan view of the same, and FIG. [Diagram 2]1A is an enlarged view of the X portion of FIG. 1A, and B is a cross-sectional view taken along the line BB of A. [Diagram 3] FIG. 1C is an enlarged view of a portion Y in FIG. 1B. [Figure 4] FIG. 1C is an enlarged view. [Diagram 5] 1A is a front view showing a waterstop panel (liner plate) used in the present invention, FIG. 1B is a plan view of FIG. 1A, and FIG. 1C is a left side view of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0020] Next, an embodiment of a water cutoff wall and a construction method for constructing the water cutoff wall according to the present invention will be described with reference to the drawings. EXAMPLES

[0021] 1A to 1C, a waterstop wall according to the present invention is a waterstop wall 10 having a foundation 1, a support column 2 erected on the foundation 1, and a waterstop panel 3 provided between the support columns 2. As shown in Fig. 5, the waterstop panel 3 has vertical flanges 31 at its left and right ends, and as shown in Fig. 3, the vertical flanges 31 of adjacent waterstop panels 3 are connected to each other by bolt joint means 4 via the support columns 2 (web portions 21). Incidentally, the symbol H in Figure 1 etc. indicates the assumed corresponding water level, and the symbol P (arrow) indicates the direction of the assumed external force.

[0022] In this embodiment, as shown in FIG. 2, the foundation 1 is a cast iron foundation pile 1 having a sheath pipe portion 11 at its upper portion for receiving the leg portion of the support 2 and a spiral pile portion 12 at its lower portion for facilitating manual penetration into the ground. The foundation pile 1 is implemented in a lightweight and compact size to enable manual work. In this embodiment, as an example only, the sheath pipe portion 11 is implemented with a height of about 290 mm, a diameter of about 140 mm, and a thickness of about 8 mm, and the pile portion 12 is implemented with a height of about 500 mm and a maximum diameter (base end) of about 140 mm. In this embodiment, the foundation 1 is implemented as a foundation pile 1 made of cast iron (metal), but is not limited thereto, and may be any member provided with a sheath tube portion for receiving the leg of the support 2 at the top and a pile portion that can be inserted into the ground at the bottom. In other words, the foundation (foundation pile) 1 according to this embodiment may or may not have a spiral pile portion, and may or may not be made of cast iron. It can also be produced by a 3D printer.

[0023] In this embodiment, an H-shaped steel 2 having a web portion 21 and a flange portion 22 is preferably used as the support column 2. The size of the H-shaped steel 2 according to this embodiment is an outer shape that fits inside the sheath pipe portion 11 of the foundation pile 1 without significant shifting, specifically, in this embodiment, as an example only, it is about H-100×100×6×8 mm and about 1800 mm in height, and is inserted so that its core is approximately aligned with the sheath pipe portion 11. The flange portion 22 of the support 2 according to this embodiment is designed such that the left and right ends are cut off by 8 mm each in the vertical direction only at the portion inserted inside the sheath pipe portion 11. This is to maintain the rigidity required for the support 2 while accommodating the compact sheath pipe portion 11 (foundation 1). The support pillar 2 is not limited to the H-shaped steel 2, and can be a channel member having a web portion and a flange portion (for example, an I-shaped steel, a C-shaped steel, or a steel material in which the webs of two C-shaped steels are integrated back to back), an angle steel (angle material), or a square steel pipe. In short, the support pillar 2 applied to the present invention may be any structure that ensures watertightness when bolted to the vertical flange 31 of the waterstop panel 3, and can be made of light-weight steel as long as it has the strength required for the design.

[0024] In this embodiment, the water stop panel 3 is preferably a liner plate 3 having horizontal flanges 32 and vertical flanges 31 on the top, bottom, left and right of a corrugated steel plate, as shown in Fig. 5. The size of the water stop panel (liner plate) 3 in this embodiment is, by way of example only, approximately 500 mm in length, approximately 1570 mm in width, and approximately 2.7 mm in plate thickness. The waterstop panel 3 is not limited to the liner plate 3, but may be any steel plate (plate material) having the required strength (rigidity) and vertical flanges 31 at the left and right ends. For example, in the case of corrugated steel plates, structures in which vertical flanges 31 are provided at the left and right ends of a corrugated plate, deck plate, keystone plate, or plank plate can be mentioned.

[0025] A waterstop wall 10 having the foundation 1, a pillar 2 erected on the foundation 1, and the waterstop panel 3 is constructed by connecting the vertical flanges 31 of adjacent waterstop panels (liner plates) 3 with bolt joint means 4 via the web portions 21 of the pillars (H-shaped steel) 2 rising from the foundation (foundation pile) 1 (see Figure 3). The bolt joining means 4 aligns four bolt holes 31a drilled vertically in the vertical flange 31 with four corresponding bolt holes 21a drilled vertically in the web portion 21, and connects (rigidly connects) adjacent water-stopping panels 3 via the supports 2 by passing bolts (hexagonal bolts) 41 through the bolt holes 31a, 21a whose centers are approximately aligned and screwing in nuts 42 to fasten them. In this embodiment, although not shown, a water-stopping means is introduced over the entire length of the contact between the vertical flange 31 of the water-stopping panel 3 and the web 21 of the support 2, by bolting with a gasket interposed therebetween and / or applying a water-stopping material, to make the water-stopping of the connected portion more reliable.

[0026] Thus, in the construction method for the water blocking wall 10 according to this embodiment, as shown in Figures 1C and 4, first, an area 9 required for constructing the water blocking wall 10 (in this embodiment, a depth of approximately 1000 mm, a width (symbol W) of approximately 1700 mm) is excavated. Next, the foundation (foundation pile) 1 is manually driven into place by a worker to a required depth (for example, about 300 mm). Next, the legs of the pillars (H-shaped steel) 2 are inserted into the sheath pipe portion 11 of the foundation 1 to be positioned. Next, as shown in Figure 3, one side of the vertical flange 31 of the water-stopping panel (liner plate) 3 is attached to both side surfaces of the web portion 21 of the support 2, and connected with the bolt connecting means 4 described above, and the water-stopping means is introduced, so that adjacent water-stopping panels 3 are connected via the support 2 while maintaining water-stopping properties. Next, in order to erect a new pillar 2 at a location suitable for connecting to the other side of the waterstop panel 3, the foundation 1 is embedded and the legs of the pillar 2 are inserted, and the work of connecting the adjacent waterstop panels 3 to both sides of the newly erected pillar 2 is repeated by hand in the panel extension direction (in one direction, or in both left and right directions) as shown in Figure 1, and the excavated area 9 is filled with cement-based improved soil as appropriate to construct a waterstop wall 10.

[0027] In this embodiment, the waterstop panels 3 are stacked in four levels, so the waterstop panels 3 are stacked in order starting from the bottom level. The waterstop panels 3 in this embodiment use liner plates 3 with horizontal flanges 32 on the top and bottom, so the horizontal flanges 32 are stacked on top of each other, the corresponding bolt holes 32a are aligned, and the panels are assembled by bolting. The waterstop means is also introduced as necessary.

[0028] Although an embodiment of the present invention has been described above with reference to the drawings, it should be noted that the present invention is not limited to the illustrated examples, and includes the range of design modifications and application variations that would normally be made by a person skilled in the art, provided that the scope does not deviate from the technical concept of the present invention. For example, the waterstop panel 3 is not limited to the liner plate 3, and when a waterstop panel without the horizontal flange 32 is used, the upper and lower overlapping parts can be joined by introducing the waterstop means without bolting. Also, when a single tall waterstop panel is used between adjacent supports 2, there is no upper and lower overlapping part, so neither the bolt joining means nor the waterstop means are required. [Explanation of symbols]

[0029] 1 Foundation (cast iron foundation piles) 11 Sheath tube 2 Pillars (H-shaped steel) 21 Web Department 21a Bolt hole 22 Flange 3. Water stop panel (liner plate) 31 Vertical flange 31a Bolt hole 32 Horizontal flange 32a Bolt hole 4. Bolt connection means 9 Excavation area (cement-improved soil) 10 Water cutoff wall H Assumed corresponding water level P external force W Width of excavation area

Claims

1. A water stop wall having a foundation, a support pillar erected on the foundation, and a water stop panel provided between the support pillars, A waterstop wall, characterized in that the waterstop panel has vertical flanges at its left and right ends, and the vertical flanges of adjacent waterstop panels are connected to each other by bolt joint means via the supports.

2. 2. The water cutoff wall according to claim 1, wherein the support pillar is a channel member having a web portion and a flange portion, or a square steel pipe.

3. 2. The water cutoff wall according to claim 1, wherein the support pillar is a steel material formed by integrating the webs of an H-shaped steel, an I-shaped steel, a C-shaped steel, an angle steel, or two C-shaped steels back to back.

4. 2. The waterstop wall according to claim 1, wherein the waterstop panel has horizontal flanges at upper and lower ends.

5. The waterstop wall according to claim 1 , wherein the waterstop panel is a liner plate, a corrugated plate, a deck plate, a keystone plate, or a plank plate.

6. The water cut-off wall according to any one of claims 1 to 5, characterized in that the foundation is a metal foundation pile having a sheath pipe portion capable of receiving the leg portion of the support.

7. A construction method for a water-stopping wall having a foundation, a support pillar erected on the foundation, and a water-stopping panel provided between the support pillars, The waterstop panel has vertical flanges at its left and right ends, and the waterstop wall is constructed by repeatedly performing a process of connecting the vertical flanges of adjacent waterstop panels to each other via the supports with bolt connecting means in the extension direction of the panels.

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