Construction method for temporary wall

Abstract

To provide a construction method capable of quickly, easily, and reliably constructing a temporary wall with an effective water-stopping effect when H-steel members are erected in a substantially vertical direction on an inclined foundation, water-stopping treatment is applied to junctions between the H-steel members and wall components composed of steel plates or the like attached therebetween, and the temporary wall extending in a lateral direction is constructed.SOLUTION: A construction method for a temporary wall comprises: constructing the temporary wall in a substantially vertical direction along a water conduction direction for a water channel having a bottom surface formed as an inclined surface; forming a temporary water channel between one side surface of the water channel and the temporary wall; stopping water conduction between the temporary wall and the other side surface of the water channel to enable construction work on an existing structure; constructing a foundation having an upper surface portion of a horizontal plane in a staircase configuration on the inclined surface existing on the bottom surface of the water channel; and constructing the temporary wall having a lower end surface closely provided on the horizontal upper surface portion.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a method for constructing temporary walls, and in particular to a method for constructing temporary walls such as temporary bulkheads used in water supply facilities in environments with a sloped bottom surface, such as a sedimentation basin, and used when carrying out repair work on existing bulkheads installed, for example, to control the water flow within the sedimentation basin.

[0002] The present invention is not limited to a method for constructing temporary partition walls for settling basins, but relates to a method for constructing temporary walls used in water facilities in environments with sloped bottom surfaces, which allow repair work to be carried out on the side walls and partition walls of such facilities while the facility is in use and without stopping the flow of water. [Background technology]

[0003] The grit basin to which this invention is primarily applied refers to a pond for settling sediment and other particles in the water flowing through it and removing them from the flow. Such a grit basin is installed before a water pumping facility to prevent wear and damage to the pump. In other words, it is an artificial pond installed in the water conveyance section of a water utilization facility to settle and remove suspended matter and solids that hinder water use and treatment.

[0004] The settling basin is also installed upstream of a dam. A dam is a place where water flowing down from a mountain is stored, and a settling basin is installed upstream of the dam.

[0005] Next, settling basins are also installed in hydroelectric power plants. Hydroelectric power plants are facilities that convert water into electricity, and if there are unwanted materials or solids, they may not be able to generate electricity efficiently, so settling basins are installed.

[0006] Furthermore, a grit basin is also installed at the inlet of a sewage treatment plant. Because sewage contains a large amount of suspended matter and solids, a grit basin is installed to prevent clogging of the waterway. In both of these facilities, the bottom of the waterway is sloped.

[0007] However, after many years of use, the side walls or partitions of the settling basin require renovation, repair, earthquake-proofing, etc. However, it is not desirable to stop the flow of water through the settling basin due to renovation, repair, earthquake-proofing, etc.

[0008] Therefore, a method is needed to carry out repair work and earthquake-proofing work on the settling basin while keeping the facility in use.To do this, a temporary bulkhead is constructed inside the settling basin, a temporary waterway is installed between the temporary bulkhead and one side wall of the settling basin, water is allowed to flow only through the temporary waterway, and the existing bulkhead or side wall on the other side of the settling basin can be repaired, modified, or earthquake-proofed while the facility is in use.

[0009] Here, we will explain the conventional method of constructing temporary bulkheads. Conventionally, a foundation with an inclined upper surface is constructed along the bottom gradient of the settling basin, and multiple H-shaped steel beams serving as support columns are erected on the inclined foundation in an approximately vertical direction. Bulkhead components made of steel plates or the like are then attached between the erected H-shaped steel beams. After that, waterproofing is applied to the joints between the H-shaped steel beams and the attached bulkhead components, and a temporary side wall extending horizontally is constructed.

[0010] However, in the past, when H-shaped steel beams and the partition wall components attached between them were installed vertically on the inclined foundation, there was a problem that proper waterproofing could not be achieved unless the undersides of the H-shaped steel beams that serve as supporting columns and the partition wall components were processed (cut, etc.) at an angle to match the inclination of the top surface of the foundation.

[0011] Furthermore, the sloped surfaces of the foundations do not all have the same angle of inclination, and the H-shaped steel beams and the diagonal undersides of the partition steel plates must be processed to match the sloped angle of the foundations, which posed the problem of making the construction of temporary partition walls extremely tedious and time-consuming.

[0012] Therefore, in recent years, there has been a demand for a construction method that can construct temporary partition walls more quickly, simply, and reliably. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] Patent Publication No. 2013-22552 Summary of the Invention [Problem to be solved by the invention]

[0014] The present invention was devised in response to the above-mentioned conventional demands, and aims to provide a construction method that allows for the rapid, simple, and reliable construction of a temporary wall with effective waterproofing, by erecting H-shaped steel beams as support columns in a substantially vertical direction on a sloping foundation, then applying a waterproof treatment to the joints between the erected H-shaped steel beams and wall components made of steel plates or the like attached between them, and constructing a horizontally extending temporary wall, without the need to cut or otherwise process the undersides of the H-shaped steel beams and wall components at an angle to match the slope of the foundation, and without the need to align and attach the diagonal undersides of the wall steel plates one by one, especially when the slope of the foundation surface changes. [Means for solving the problem]

[0015] The present invention provides A temporary wall construction method for a waterway with an inclined bottom surface, in which a temporary wall is constructed in a substantially vertical direction along the water flow direction, a temporary waterway is formed between one side of the waterway and the temporary wall, water flow is stopped between the temporary wall and the other side of the waterway, and construction work on an existing structure existing between the temporary wall and the other side of the waterway is enabled. A foundation having a horizontal upper surface was constructed in a stepped manner on the inclined surface at the bottom of the waterway, and a temporary wall having a lower end surface closely attached to the horizontal upper surface of the constructed stepped foundation was constructed. It is characterized by the fact that or A temporary wall construction method for a water facility with a sloped bottom, which involves constructing a temporary wall in a substantially vertical direction, forming a temporary water passage on one side of the temporary wall, stopping water passage to the other side of the temporary wall, and enabling construction work on an existing structure on the other side of the temporary wall, A foundation having a horizontal upper surface was constructed in a stepped manner on the inclined surface at the bottom of the water utilization facility, and a temporary wall having a lower end surface was constructed to be closely attached to the horizontal upper surface of the constructed stepped foundation. It is characterized by the fact that or The stepped foundation was constructed only at the location where the temporary wall was to be constructed. It is characterized by the fact that or Regarding the construction of a temporary wall having a lower end surface that is tightly installed on the horizontal upper surface of the constructed stepped foundation, waterproofing was applied to the tightly installed area. It is characterized by the fact that or The temporary wall was constructed by fabricating wall units in advance, each having a support column and a wall panel attached between the support columns, laying the fabricated wall units on the stepped foundation, and connecting the laid wall units together. It is characterized by the following. [Effects of the Invention]

[0016] According to the present invention, when constructing a temporary wall extending horizontally, it is not necessary to cut the undersides of the H-beam steel and bulkhead steel components at an angle to match the inclination of the foundation, and when installing the H-beam steel and bulkhead steel along a sloping foundation, when installing wall components with angled undersides between the H-beam steel installed at an angle, it is not necessary to align the diagonal underside of the wall steel plate one by one, especially for foundation surfaces with changing inclination angles, thereby achieving the excellent effect of providing a construction method that can quickly, easily, and reliably construct a temporary wall with a waterproof effect. [Brief explanation of the drawings]

[0017] [Figure 1] FIG. 1 is an explanatory diagram (1) illustrating the configuration of an embodiment of the present invention. [Figure 2] FIG. 2 is an explanatory diagram (2) illustrating the configuration of an embodiment according to the present invention. [Figure 3] FIG. 3 is an explanatory diagram (3) illustrating the configuration of an embodiment of the present invention. [Figure 4] FIG. 4 is an explanatory diagram (4) for explaining the configuration of an embodiment according to the present invention. [Figure 5] 1 is a schematic diagram illustrating a schematic configuration of the present invention; DETAILED DESCRIPTION OF THE INVENTION

[0018] The present invention will now be described with reference to the embodiments shown in the drawings. Figure 4 shows an overview of the settling basin 1. As shown in Figure 4, a newly constructed side wall 10 that has already undergone repair or renovation work is provided on the left side of the settling basin 1.

[0019] In addition, an existing partition wall 11 is erected at approximately the middle position in the width direction of the settling basin 1, where renovation, repair or earthquake-proof construction will be carried out.

[0020] Here, in order to carry out repairs to the existing bulkhead 11, etc., it is necessary to stop the flow of water around the existing bulkhead 11. For this reason, it is necessary to construct a temporary wall, the temporary bulkhead 4. That is, in the example of Figure 4, a temporary water passage 13 is formed between the new side wall 10 and the temporary bulkhead 4, and water is allowed to flow only through the temporary water passage 13, so that the repairs can be carried out without allowing water to flow around the existing bulkhead 11 to be repaired.

[0021] As shown in Figures 1 and 5, the bottom of a settling basin 1, for example, is a downwardly sloping surface 2. In the present invention, when a foundation 3 is poured onto the sloping surface 2, the foundation 3 is poured in a stepped manner as shown in the figures. Note that the stepped foundation 3 need only be poured to the width of the area where a temporary bulkhead 4 is to be constructed.

[0022] Then, a foundation 3 having a horizontal upper surface 6 is constructed in a stepped manner on the inclined surface 2 of the settling basin 1, in the example shown in Figure 1, in a descending stepped manner from the back to the front. In other words, the stepped foundation 3 is constructed so that the upper surface 6, which is the top end of each foundation step 5, is horizontal.

[0023] Next, a plurality of support columns 7 made of H-shaped steel or the like are erected at predetermined intervals in a substantially vertical direction toward the longitudinal direction of the stepped foundation 3. Then, wall panels 8 made of steel or the like are attached between the support columns 7 erected at predetermined intervals.

[0024] Here, there is no limitation on the method for attaching the wall panels 8 between the support columns 7. If the support columns 7 are H-shaped steel beams, they may be attached by inserting the side ends of the wall panels 8 made of steel plates into the recesses of the opposing H-shaped steel beams, or the wall panels 8 made of steel plates may be attached to the front and back sides of the support columns 7.

[0025] Furthermore, if the wall panels 8 are attached to the front and back sides of the support columns 7, the wall panels 8 can be attached in advance between the support columns 7 at a factory to form a wall unit, which can then be erected on site and constructed simply by connecting them together, allowing the construction of the temporary partition wall 4 to be carried out smoothly.

[0026] The temporary bulkhead 4 is constructed as described above, but at the connection between the upper surface 6, which is the surface of the stepped foundation 3, and the temporary bulkhead 4, for example made of steel, constructed on the foundation 3, a sealant 9, for example, is applied as shown in Figure 2 to seal the gap at the connection between the upper surface 6 of the stepped foundation 3 and the temporary bulkhead 4, for example made of steel, constructed on the foundation 3, and further, a waterproof coating is applied from part of the side of the temporary bulkhead 4 to the upper surface 6 of the foundation 3, spanning over the sealant 9, as shown in Figure 3.

[0027] However, after constructing the temporary partition wall 4, in order to avoid stopping the water flow operation of the settling basin 1, as described above, a temporary water passage 13 is provided between the newly constructed side wall 10 and the newly constructed temporary partition wall 4, and water is passed through the temporary water passage 13.

[0028] Then, while water is allowed to flow through the temporary waterway 13, renovation, repair or earthquake-proofing work can be carried out on the existing bulkhead 11, etc., erected on the opposite side of the temporary bulkhead 4. In other words, since water is not allowed to flow through the waterway on the opposite side of the new side wall 10 separated by the temporary bulkhead 4, the renovation, repair or earthquake-proofing work can be carried out smoothly and safely.

[0029] After the repairs are completed, the temporary bulkheads 4 can be easily removed. The removed temporary bulkheads 4 can be reused. Next, the stepped foundations 3 are also removed. Since the foundations 3 are installed only where the temporary bulkheads 4 will be constructed, they can be easily removed.

[0030] By constructing the stepped foundation 3 described above, the support columns 7 made of H-shaped steel and the wall panels 8 made of steel plates can be reliably and easily erected vertically on the foundation 3, making it possible to construct the temporary bulkhead 4 rationally and with high cost performance in terms of materials and labor.

[0031] Furthermore, since the top end of the foundation 3, i.e., the upper surface 6, is a horizontal surface, it is easy to perform waterproofing work at the connection between the upper surface 6 of the foundation 3 and the lower part of the wall panel 8 that makes up the temporary partition wall 4, and waterproofing performance can be reliably ensured by the sealing material 9 and waterproof coating.

[0032] Here, an outline of a method for constructing the temporary partition wall 4 will be described. First, the construction anchors 12 are installed in the vicinity of the support pillars 7 that will become the pillars of the temporary bulkhead 4, with the tip threads of the construction anchors 12 projecting upward (see FIG. 2).

[0033] Next, a stepped foundation formwork is installed along the laying line of the temporary partition wall 4 on the bottom surface of the settling basin 1. Thereafter, foundation concrete is poured into the installed stepped foundation formwork to construct a stepped foundation 3.

[0034] Next, for example, a wall unit is fabricated in advance in a factory, in which the support columns 7 and the wall panels 8 made of steel plates between them are integrated. That is, the wall panels 8 made of steel plates are set between the support columns 7 and fixed to the side surfaces of the support columns 7 by welding or the like.

[0035] At this time, for the wall panels 8 to be installed on the stepped portions of the stepped foundation 3, the lower ends of the wall panels 8 are cut and processed in a stepped shape.

[0036] The wall units fabricated in advance as described above are transported to the site and erected on the stepped foundation 3. At this time, nuts are fastened to the threaded ends of the construction anchors 12 to secure the construction anchors 12 to the base plate, and the support columns 7 are firmly fixed to the foundation 3, thereby constructing the temporary partition wall 4. After the temporary partition wall 4 is erected, a sealant 9 such as urethane sealant is applied to close the gap between the surface of the foundation 3 and the lower end of the wall panel 8. Furthermore, a waterproof coating (urethane waterproofing) is applied to the lower end surface of the temporary partition wall 4 across the foundation 3, support columns 7, and wall panel 8.

[0037] After that, a water flow test will be conducted on the temporary water passage 13 set up between the new side wall 10 and the temporary bulkhead 4 to check for any leaks, and if any leaks are found, they will be repaired, and then the water will be allowed to flow properly.

[0038] As described above, water flow is stopped on the side of the temporary bulkhead 4 opposite the new side wall 10 in the width direction, and water is not allowed to flow around the existing bulkhead 11 to be repaired, for example. Therefore, while the temporary waterway 13 remains in use, repairs, renovations, or earthquake-proofing work can be carried out on the existing bulkhead 11, etc., while water is not allowed to flow through the other waterway.

[0039] Although the above example describes a method for constructing a temporary partition wall in a settling basin, the present invention is not limited to the above temporary partition walls, and can also be applied as a temporary wall for carrying out construction work while the facility is in use in environments where the bottom surface is inclined, such as at water facilities such as pumping stations and water treatment plants. [Explanation of symbols]

[0040] 1. Settling basin 2 Slope 3 Basics 4 Temporary bulkhead 5 Foundation stage 6 Top part 7 Support pillar 8 wall board 9 Sealing material 10 New side wall 11 Existing bulkhead 12 Construction anchors

Claims

1. A temporary wall construction method for a waterway with an inclined bottom surface, in which a temporary wall is constructed in a substantially vertical direction along the water flow direction, a temporary waterway is formed between one side of the waterway and the temporary wall, water flow is stopped between the temporary wall and the other side of the waterway, and construction work on an existing structure existing between the temporary wall and the other side of the waterway is enabled. A foundation having a horizontal upper surface was constructed in a stepped manner on the inclined surface at the bottom of the waterway, and a temporary wall having a lower end surface closely attached to the horizontal upper surface of the constructed stepped foundation was constructed. A method for constructing a temporary wall.

2. A temporary wall construction method for a water facility with a sloped bottom, which involves constructing a temporary wall in a substantially vertical direction, forming a temporary water passage on one side of the temporary wall, stopping water passage to the other side of the temporary wall, and enabling construction work on an existing structure on the other side of the temporary wall, A foundation having a horizontal upper surface was constructed in a stepped manner on the inclined surface at the bottom of the water utilization facility, and a temporary wall having a lower end surface was constructed to be closely attached to the horizontal upper surface of the constructed stepped foundation. A method for constructing a temporary wall.

3. The stepped foundation was constructed only at the location where the temporary wall was to be constructed.

3. A method for constructing a temporary wall according to claim 1 or 2.

4. Regarding the construction of a temporary wall having a lower end surface that is tightly installed on the horizontal upper surface of the constructed stepped foundation, waterproofing was applied to the tightly installed area.

3. A method for constructing a temporary wall according to claim 1 or 2.

5. The temporary wall was constructed by fabricating wall units in advance, each having a support column and a wall panel attached between the support columns, laying the fabricated wall units on the stepped foundation, and connecting the laid wall units together.

3. A method for constructing a temporary wall according to claim 1 or 2.

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