Waterway repair method

Abstract

To provide a method for repairing a channel which can reinforce the strength of the channel, is excellent in workability because it does not involve removal and dismantling, is excellent in water leakage (water stoppage) durability, is extremely practical and can suppress reduction of empty volume in the channel by facilitating construction, not increasing the cost, and facilitating transportation because the wall thickness of the concrete blocks arranged side by side can be reduced.SOLUTION: In a method for repairing a channel, thin L-shaped or U-shaped concrete blocks 3 are arranged side by side in the channel length direction along a channel-forming wall 2 one by one inside the channel-forming wall 2 of an existing channel 1, an overlapping gap 4 and a butt joint 5 are filled with a filler 6, and the existing channel 1 and the concrete block 3 are integrated by connecting them with connecting means 7 to form a new channel inside the existing channel 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for repairing and reinforcing a dilapidated or deteriorated waterway, and is directed to an existing waterway, for example, a waterway having a waterway forming wall portion supporting earth pressure formed of concrete blocks, a waterway formed of stone masonry or block masonry. fruit This relates to a method of repairing and reinforcing existing waterways by forming a new waterway on the inside of an existing waterway wall, such as a waterway that has been renovated or an earthen gutter made of hardened soil, by sequentially lining up concrete blocks in the longitudinal direction of the waterway so that they run along (overlap) the waterway wall, thereby forming a new waterway on the inside of the existing waterway. [Background technology]

[0002] The causes of deterioration (decline in functionality) of waterways in concrete block waterways include wear of the concrete, frost damage, alkali-aggregate reaction, impact and movement of boulders inside the waterway, and destruction by external forces. In stone or block masonry waterways, causes include falling of stones due to spring water, deformation due to deformation of soil masses, subsidence and leakage. Repair methods include renovation (demolition and rebuilding), painting with inorganic or organic materials, and repair by attaching panels.

[0003] In other words, various methods have been proposed and implemented so far as methods of repairing and reinforcing side walls and culvert bottoms that have become aged and deteriorated and have lost their function as channels; however, in order to repair a wide area, the construction work is troublesome or large-scale reinforcement work or water-stopping work is required, and until now there has been no method that can be easily applied to new channels that have excellent channel retention strength and water leakage stoppage durability and do not significantly reduce the empty volume within the channel.

[0004] For example, as mentioned above, repair methods have been proposed that involve covering the surface with inorganic or organic materials, but these methods are easily affected by weather and construction conditions when applied on-site, and quality control is often insufficient in many cases.

[0005] Furthermore, the repair method of polymerizing and covering the panel system does not provide a polymerized shape that is in line with the existing waterway formation, resulting in a butt joint structure at the corners, which does not adequately restore the function of the waterway.

[0006] To explain further, proposed methods include connecting repair vertical panels and repair bottom panels to the inside of the waterway wall and lining them up in the direction of the waterway, then filling the gap between the waterway wall and the panel with adhesive (filler such as mortar), or fixing an L-shaped repair panel to part of the bottom and filling the gap inside with mortar. However, although these panels are easy to transport to the site, they do not reinforce the strength of the waterway, and they must be firmly fixed to the waterway wall of the existing waterway with anchor bolts, etc., making construction difficult, and especially when repairing a wide area along the waterway, the construction is extremely troublesome. Furthermore, water cannot be stopped sufficiently, and ultimately the strength and water leakage (water stoppage) durability are poor. Existing This is a repair method that relies almost entirely on the waterway, and does not restore the function of the waterway, but only repairs some damaged or uneven parts, making it suitable for repairing each part one by one, and is also costly (Patent Document 1: JP 2011-94441 A). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2011-94441 A Summary of the Invention [Problem to be solved by the invention]

[0008] The present invention has been made to identify and solve such problems. The concrete blocks which are the repair parts are one-piece molded products, and since they are arranged side by side on the inside of the wall forming the waterway, they act as a reinforcement and can be mass-produced. Furthermore, the construction of lining them up side by side is easy, and the filling work to connect and fix them and the connection work using a connecting means are also easy, so the method is easy to work with and has excellent strength and water leakage (water stoppage) durability. Furthermore, since the repair method involves placing concrete blocks on the inside of an existing waterway while it is subjected to earth pressure to reinforce it, and then forming a new waterway on the inside, the concrete blocks can be made thinner than, for example, concrete blocks used when constructing a completely new waterway, so the construction is easier, the cost is not high, they are easy to transport, and the reduction in the empty volume within the waterway can be suppressed. This is an extremely practical and revolutionary method of repairing waterways. [Means for solving the problem]

[0009] The gist of the present invention will now be described with reference to the accompanying drawings.

[0010] The existing waterway 1 is provided on the inside of the waterway forming wall 2. formation A method for repairing an existing waterway (1) by sequentially arranging concrete blocks (3) in a line along a waterway-forming wall (2) so as to overlap the wall (2) in the length direction of the waterway, A bedding material is laid on the bottom of the existing waterway 1 that needs repair to form a repair bottom 8, and on this repair bottom 8, The L-shaped concrete block 3, which is integrally formed, or the U-shaped concrete block 3, which is integrally formed by connecting the bottoms of the opposing L-shaped parts, is placed so that the erected part of the concrete block 3 is aligned with the waterway forming wall part 2 of the existing waterway 1 that needs to be repaired. The concrete blocks 3 are installed in a wall of the building, and an elastic sealant 10 is inserted between the concrete blocks 3 to prevent water leakage. Install them in sequence along the length of the waterway. This concrete block 3 and the water channel formation A filler 6 is filled in the overlapping gap 4 with the wall portion 2 and the butt joints 5 between the concrete blocks 3 for adhesive connection, and the concrete blocks 3 are bonded to each other. The elastic sealing material 10 is pressed against the two parts and the compressed and deformed state is maintained. The existing waterway 1 and the concrete block 3 are integrated by connecting them with a connecting means 7. height, The earth pressure is as mentioned above. ExistingThe thickness of the water channel 1 is reduced by supporting the water channel 1 with the water channel forming wall portion 2. Setting The concrete block 3 is an integrally formed product, and a new waterway wall is formed inside the waterway forming wall 2 of the existing waterway 1, so that the reduction in the waterway strength and the empty volume inside the waterway are suppressed, and a new waterway without leakage is formed. The above This relates to a method of repairing a waterway, characterized by forming the pipe on the inside of an existing waterway (1).

[0011]

[0012]

[0013] Furthermore, the concrete blocks 3 are provided with connectors 7 as the connecting means 7 at their butted edges by insert molding. 1 Description This relates to a method for repairing waterways.

[0014] Furthermore, a recess 9 for arranging a connector 7 as the connecting means 7 is provided at the butted edge of the concrete block 3, and the connectors 7 provided in the recess 9 are engaged and connected to each other. 1 Description This relates to a method for repairing waterways.

[0015] The height of the erected portion of the concrete block 3 is set higher than the height of the waterway forming wall portion 2. 3 The present invention relates to a method for repairing a waterway described in any one of the above items. Effect of the Invention

[0016] Since the present invention is configured as described above, the concrete blocks which are the repair parts are one-piece molded products, and since they are arranged side by side on the inside of the wall forming the waterway, they have a reinforcing effect and can be mass-produced. Furthermore, the construction of lining them up side by side is easy, and the filling work to connect and fix them and the connection work using connecting means are also easy, so the method is excellent in workability as well as strength and water leakage (water stoppage) durability. Moreover, since this is a repair method in which concrete blocks are installed inside an existing waterway while it is subjected to earth pressure to reinforce it, and a new waterway is formed inside this, the concrete blocks can be made thinner than, for example, the concrete blocks used when constructing a completely new waterway, so the construction is easier, the costs are not high, they are easy to transport, and the reduction in the empty volume inside the waterway can be suppressed, making this an extremely practical and revolutionary waterway repair method. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is an explanatory perspective view of the present embodiment (Example 1). [Diagram 2] FIG. 2 is an explanatory perspective view of the L-shaped concrete block of the present embodiment. [Diagram 3] FIG. 2 is an explanatory front view of the embodiment before a filler is injected. [Figure 4] FIG. 11 is an explanatory plan view of a juxtaposition process in the present embodiment. [Diagram 5] 1A and 1B are an enlarged explanatory plan view and an enlarged explanatory side sectional view of a main part of a juxtaposition process of the present embodiment. [Figure 6] FIG. 11 is an explanatory perspective view of a U-shaped concrete block according to another embodiment (Example 2). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] BEST MODE FOR CARRYING OUT THE PRESENT DISCLOSURE The preferred embodiment of the present invention will be briefly described with reference to the accompanying drawings, which show the operation of the present invention.

[0019] An existing waterway 1 is repaired by arranging L-shaped or U-shaped concrete blocks 3, which are integrally molded and easy to mass-produce, in parallel in the length direction of the waterway along the waterway forming wall 2 on the inside of the waterway forming wall 2.

[0020] In other words, for example, thin L-shaped concrete blocks 3 which are formed as an integral part, or if the width of the channel is narrow, thin U-shaped concrete blocks 3 (upright parts) which are formed as an integral part with the bottoms of opposing L-shaped parts connected together, are sequentially arranged in parallel along the length of the channel so as to follow (overlap) the channel forming wall part 2 of the existing channel 1 which needs repair.

[0021] Then, a filler 6 (filling grout such as mortar) for adhesively connecting the concrete blocks 3 is filled into the overlapping gap 4 between the concrete blocks 3 (back side of the upright portion) and the waterway forming wall portion 2 and into the butt joints 5 between the concrete blocks 3, and the concrete blocks 3 are connected to each other with connecting means 7 to integrate the existing waterway 1 and the concrete blocks 3.

[0022] Therefore, a new waterway is formed by the concrete blocks 3 which are sequentially arranged side by side, connected and fixed inside the waterway forming wall 2 of the existing waterway 1. In other words, a new waterway which is leak-free and prevents the strength and empty volume of the waterway from decreasing is formed inside the existing waterway 1, and the existing waterway 1 is repaired.

[0023] That is, by lining up integrally molded L-shaped or U-shaped concrete blocks 3 on the inside of the waterway forming wall 2 of the existing waterway 1, filling the overlapping gaps 4 and butt joints 5 with a filler 6, and connecting and fixing them with connecting means 7, the existing waterway 1 can be firmly reinforced with the concrete blocks 3 through simple construction, and it has excellent water-stopping durability without leaking, and the earth pressure around the existing waterway 1 is also low. Existing Since the waterway 1 is supported by the waterway forming wall portion 2, the concrete block 3 which further reinforces it can be made into a one-piece molded product with a thin thickness or low rigidity. Since the strength of the waterway can be reinforced by such a thin concrete block 3, construction, transportation and mass production become easier, and the cost does not increase, and a large reduction in the empty volume inside the waterway can be prevented.

[0024] In other words, since this is a repair method in which a new waterway is formed by placing reinforcing concrete blocks 3 on the inside of an existing waterway 1 under earth pressure, it is possible to set the thickness of the concrete blocks thinner than concrete blocks (general general-purpose waterway concrete products) used when constructing a completely new waterway, and the strength of the waterway can be increased by the concrete blocks 3, which are integrally formed products with a thin thickness. Therefore, the concrete blocks 3, which are molded products, are lined up in order and connected and fixed with the filler 6 and connecting means 7, making construction easy, and the concrete blocks 3 can be made relatively lightweight, making construction even easier in terms of productivity and ease of transportation, preventing cost increases, and suppressing the reduction in the empty volume inside the waterway. EXAMPLES

[0025] A first specific embodiment of the present invention will be described with reference to the drawings.

[0026] For example, there are various types of waterways, such as waterways whose waterway forming walls 2 that support earth pressure are made of concrete blocks, waterways made of stone or block masonry, or earth gutters made of hardened soil. This is a repair method for such waterways that have deteriorated and lost their function due to aging and deterioration, by laying concrete blocks 3 that conform to the shape of the waterway so that they run along (overlap) the waterway forming walls 2, and improving functionality such as covering leaks and deteriorated parts and correcting linearity. In this embodiment, for example, an existing waterway 1 in which the waterway forming walls 2 are made of relatively thick concrete blocks that support earth pressure is repaired by installing newly mass-produced thin concrete blocks 3, that is, L-shaped thin concrete blocks 3 that are molded as a single unit and easy to mass-produce, side by side in sequence along the length of the waterway, on the inside of the waterway forming walls 2 made of concrete blocks.

[0027] Specifically, the channel forming wall 2 of the existing waterway 1, made of a thick concrete block, is cleaned, a bedding material is laid at the bottom of the existing waterway 1 (for example, by pouring bedding mortar) to form a repair bottom 8, and thin L-shaped concrete blocks 3 (L-shaped concrete blocks 3 which are thinner than general concrete block products for waterways) which are integrally formed with the channel forming wall 2 of the existing waterway 1 that needs repair are sequentially arranged in the longitudinal direction of the waterway so that the upright parts of the concrete blocks 3 overlap (align).

[0028] Then, a filler 6 (filling grout) is filled into the overlapping gap 4 between the back surface of the thin upright part of the concrete block 3 and the waterway wall 2, and into the butt joints 5 of the concrete blocks 3, for adhesive connection. The concrete blocks 3 are then connected to each other with connecting means 7 to integrate the existing waterway 1 with the concrete blocks 3. A new waterway forming wall made of the concrete blocks 3 is formed inside the old waterway forming wall 2 of the existing waterway 1, reinforcing the strength of the waterway and preventing a reduction in the empty volume within the waterway, and a new waterway which does not leak is formed inside the existing waterway 1, thereby providing a waterway repair method.

[0029] Furthermore, in this embodiment, since this is a repair method in which the channel forming wall 2 of the existing channel 1 continues to bear earth pressure as before, while a new thin concrete block 3 is installed inside it to form a new channel, the thickness can be set thinner than that of concrete blocks used when constructing an entirely new channel (for example, the thickness can be set to less than half, for example 50 to 70 mm for the upright part and 50 to 70 mm for the bottom part).

[0030] That is, since it is not necessary to have the thickness or rigidity required to cope with earth pressure when constructing a new waterway, in this embodiment, the concrete block 3, which is a thin, integrally molded product with the same material but a thin wall thickness, is adopted, and these are mass-produced, transported to the site, and lined up in the existing waterway 1, making it possible to strongly reinforce the waterway with the concrete blocks 3. In this way, the concrete blocks 3, which are molded products, are lined up in order to reinforce the existing waterway 1, and the method of connecting them with the filler 6 and the connecting means 7 makes construction easy, and furthermore, since the concrete blocks 3 are thin and relatively lightweight as described above, construction is made even easier, including productivity and ease of transportation, and does not become expensive, and since they are relatively thin, it is possible to suppress a reduction in the empty volume inside the waterway.

[0031] In other words, the concrete blocks 3, which are the repair and reinforcement parts, can be mass-produced, and they can be easily installed side by side. The filling work to connect and fix them and the connecting work using the connecting means 7 are also easy, so it is easy to work with and can reinforce the existing waterway 1, and it has excellent durability against water leakage (water stoppage). Moreover, as described above, this repair method involves installing concrete blocks 3 inside the existing waterway 1 while it is subjected to earth pressure, reinforcing and repairing it to form a new waterway, so not only does it reinforce the strength of the waterway, but it can also be made thinner than the concrete blocks used when building an entirely new waterway, making it easier to work with, not expensive, easy to transport, and prevents a reduction in the empty volume inside the waterway, making it an extremely practical and revolutionary waterway repair method.

[0032] For example, factory-produced (quality-controlled) concrete blocks 3 that are made to fit the shape of the target waterway are brought in and installed as one unit or in sections, and the clearances are filled with the same type of (concrete-based) filler 6, so procurement costs and quality are stable, and construction is easy as mentioned above. Also, since the basic shape is the same as the existing waterway 1, if clearance is secured at the bottom of the culvert, the top of the waterway can also be secured.

[0033] In addition, since the repair can be done by machine, workability is improved and the downtime required for repair can be shortened.

[0034] In this embodiment, since the existing waterway 1 is resistant to external forces, the concrete blocks 3 can be thin, and the construction is aimed at improving and restoring the functionality of the existing waterway 1 due to material deterioration, which also improves workability in this sense.

[0035] In addition, in an existing waterway 1 where the soil is retained by masonry or block laying and no external forces such as earth pressure are applied, if the waterway width differs between the upstream and downstream sides, new thin concrete blocks 3 can be installed on both sides and concrete can be poured later in the center of the bottom of the culvert to make the uneven waterway width uniform and repair it.

[0036] In this embodiment, as described above, a bedding material is laid at the bottom of the existing waterway 1 (for example, by pouring bedding mortar) to form a repair bottom 8 and the longitudinal gradient of the waterway is adjusted, and the bottom of the concrete block 3 is placed on this repair bottom 8 and further fine-tuning of the gradient is performed before lining up along the waterway forming wall portion 2.

[0037] Furthermore, for example, when the width of the existing waterway 1 is narrow and a U-shaped concrete block 3 is used, construction becomes even easier; in this case (another example, Example 2), too, the thin U-shaped concrete block 3 is placed on the repair bottom 8 and aligned in the direction of the waterway.

[0038] In the case of the L-shaped concrete block 3 of this embodiment, a bottom concrete block 11 (floor panel) can be placed on this repair bottom 8 between the opposing bottoms of the opposing L-shaped concrete blocks 3, and these can be further constructed to connect the left and right concrete blocks 3 (the joints can also be filled with filler 6 to connect them).

[0039] In this embodiment, the concrete blocks 3 are butted together along the existing waterway 1, and the overlap gap 4 between the waterway wall 2 and the erected portion is filled with a filler 6 (a filling grout such as mortar) to bond and join them together, but in this embodiment, the concrete blocks 3 are formed in a shape that creates a gap on the surface of the butt joint 5, and the filler is filled in. In other words, even when the blocks are butted together so that no gap is created, a joint recess is integrally formed on the surface (inner surface), and the filler 6 is injected into the joint recess formed on the inner surface of the butt joint 5.

[0040] In addition, in this embodiment, an elastic sealant 10 made of an elastic rod is interposed between the butt edges (butt end faces) of the concrete blocks 3, which is crushed and pressed when the concrete blocks 3 are pulled together so that there is almost no gap in the butt joint 5 as described above, thereby improving watertightness.

[0041] Specifically, an engagement recess is provided on the end faces of the parallel butt surfaces of the upright and bottom parts of the concrete block 3, for engaging and arranging the elastic sealant 10 in a slightly protruding state, and the elastic sealant 10 is attached to this engagement recess. The concrete block 3 that is to be placed parallel to this concrete block 3 is then pulled in using a pulling tool or the like, thereby crushing and elastically pressing the sealant 10. Furthermore, as described above, by filling the joint recess on the inner surface of the butt joint 5 with filler 6, not only is the watertightness provided by the filler 6 improved, but the pressure application of the sealant 10 also greatly improves the watertightness, forming a new waterway that does not leak.

[0042] In this embodiment, furthermore, a connector 7 is provided by insert molding as a connecting means 7 for preventing the abutted concrete blocks 3 from separating from each other at the abutted edges of the concrete blocks 3 .

[0043] Specifically, a recess 9 for mounting a connector 7 as the connecting means 7 is provided at the butted edges of the concrete block 3, and the base of the connector 7 is embedded in the concrete block 3 by insert molding, with its tip exposed in a protruding state within the recess 9 and positioned so as to fit within the recess 9 and not protrude from the inner bottom surface of the concrete block 3, and the connectors 7 within the recess 9 are engaged and connected to each other.

[0044] To explain more specifically, in this embodiment, in order to enable the connecting devices 7 to be connected to each other after the concrete blocks 3 are butted together and arranged side by side, locking portions are provided on the connecting devices 7 that are exposed within the recesses 9 and are close to each other, and the locking connecting devices 7 which are separate parts that engage and connect to each of these locking portions are overlappingly connected to lock and connect the butted concrete blocks 3.

[0045] To explain this point further, when covering concrete blocks 3 are laid side by side, water leakage at the joints becomes an issue, but in this embodiment, as a structure to prevent this, 1 an elastic sealant 10 is inserted and compressed to join them, which is effective. 2 This elastic sealant 10 is given a certain degree of compressive deformation to improve waterproofing. 3 The connecting means 7 (connector) is configured as a pulling and locking metal fitting, so as to maintain the compressed and deformed state of the elastic sealant 10. 4 This connector 7 is configured to combine a pulling operation function with a spacing maintenance function. 5 As the concrete blocks 3 are thin, existing metal fittings for connecting concrete blocks together cannot be used, so metal fittings that perform the functions described above have been developed and used, but 6 The connecting fittings 7 have a large separation prevention force in the parallel installation direction, but a small holding force in the vertical and horizontal directions. Taking into consideration the above points 1 to 6, water leakage is firmly suppressed.

[0046] In this embodiment, the height of the thin-walled upright portion of the concrete block 3 is set slightly higher than the height of the channel forming wall portion 2 of the existing waterway 1, and this height increases the empty volume within the diversion channel, further preventing a reduction in the empty volume within the channel.

[0047] In other words, although the thickness of the concrete block 3 is set thin, the empty volume inside the diversion channel is reduced. Existing When the volume reduction rate of the waterway 1 is large, the height of the erected portion is made slightly higher than that of the existing waterway 1 in this manner so that the empty volume within the waterway can be maintained or increased.

[0048] Furthermore, even if the empty volume within the waterway is reduced, by using concrete blocks 3 made of a material that can reduce the roughness (internal roughness) of the waterway forming walls (upright sections), etc., it is possible to prevent the flow capacity from decreasing even if the empty volume within the waterway is reduced, or to improve the flow capacity thereby.

[0049] That is, the function of the waterway is related to the empty volume in the waterway and the flow capacity. In this embodiment, the empty volume in the waterway is reduced because concrete blocks 3 are installed in the existing waterway, but the volume in the vertical direction is secured. Also, the flow capacity is determined by factors such as the empty volume in the waterway, the roughness of the inner space, and the flow gradient. In this embodiment, the repair method uses the existing waterway 1, so the flow gradient is As it is, Roughness of Securing empty space in waterways While It can be improved.

[0050] Incidentally, the present invention is not limited to the present embodiment, and the specific configuration of each component can be designed as appropriate. [Explanation of symbols]

[0051] 1 Existing waterways 2 Channel forming wall 3 Concrete blocks (L-shaped or U-shaped) 4 Polymerization gap 5 Butt joint 6. Fillers 7 Connecting means (connecting tool) 8 Repair bottom 9. Recess for arranging connector 10 Elastic sealing material

Claims

1. A method for repairing an existing waterway by sequentially arranging concrete blocks in a longitudinal direction along a waterway forming wall portion of an existing waterway so as to overlap the waterway forming wall portion on the inside of the waterway forming wall portion of the existing waterway, comprising the steps of: A bedding material is laid on the bottom of the existing waterway that needs repair to form a repair bottom, and the L-shaped concrete block that is integrally formed on this repair bottom, or the U-shaped concrete block that is integrally formed by connecting the bottoms of opposing L-shaped parts, is installed so that the upright parts of the concrete block are aligned with the waterway forming wall part of the existing waterway that needs repair, and the concrete blocks are sequentially arranged in parallel in the waterway length direction with an elastic sealant having elasticity that prevents water leakage by being pressed between the butt joints of the concrete blocks, and the overlapping gap between the concrete block and the waterway forming wall part and the concrete sealant are sealed. a filler for adhesively connecting the butt joints between the concrete blocks, and then the concrete blocks are butted together and connected with a connecting means that maintains the elastic sealant in a compressed and deformed state to integrate the existing waterway and the concrete block, and the concrete block is integrally formed with the existing waterway so that earth pressure is supported by the waterway forming wall of the existing waterway and the thickness of the integrally formed concrete block is set thinner accordingly, and a new waterway wall is formed inside the waterway forming wall of the existing waterway, thereby forming a new waterway inside the existing waterway in which the reduction in waterway strength and empty volume within the waterway are suppressed and water leakage is prevented.

2. 2. A method for repairing a waterway according to claim 1, wherein said connecting means comprises connectors provided at the butted edges of said concrete blocks by insert molding.

3. 2. A method for repairing a waterway according to claim 1, characterized in that a recess for mounting a connector is provided on the butt edges of the concrete blocks, in which a connector is mounted as the connecting means, and the connectors mounted in this recess are engaged and connected to each other.

4. 4. The method for repairing a waterway according to claim 1, wherein the height of the erected portion of the concrete block is set higher than the height of the waterway forming wall portion.

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