JP2009019369A - Expansion gap water leakage prevention device in railway viaduct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an expansion gap water leakage prevention device in a railway viaduct capable of well absorbing the expansion of a floor slab while surely preventing expansion gap water leakage from occurring by preventing a boundary surface leak through the contact boundary surface of a waterproof sheet on the surface of the expansion gap of a concrete floor slab and a penetration leak through a concrete surface layer part on the surface of the expansion gap of the concrete floor slab. <P>SOLUTION: The expansion gap 8 in the railway viaduct is covered by the waterproof sheet 5. The left and right side sheet parts 6, 7 of the waterproof sheet 5 are supported on the surface of the expansion gap of the water channel 4 of the first and second concrete floor slabs 1A, 1B. The intermediate part of the waterproof sheet 5 is curved between both support parts. First and second water penetration prevention layers 11, 12 are formed at the expansion gap surface layer part of the water channel 4 of the first and second concrete floor slabs 1A, 1B. Also, first and second coated waterproof layers 13, 14 are formed to continuously cover the surfaces of the left and right sheet parts 6, 7 of the waterproof sheet 5 and the surface portion of the water channel 4 of the first and second concrete floor slabs 1A, 1B along the end edges of the left and right side sheet parts 6, 7 on the opposite side of the expansion gap 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to an idle water leakage prevention device for preventing leakage through a gap formed between free ends of a concrete floor slab that forms a railway viaduct.

  As shown in FIG. 1 and FIG. 2, the concrete slab 1 has slab tracks 2 for rising and descending extending from the surface of the slab and extending in the bridge length direction, and a central passage 3 is formed between both slab tracks 2. And a water channel 4 extending in the bridge length direction along the outside of each slab track 2 is formed.

  Thus, since the railway viaduct such as the Shinkansen is constructed sequentially for each unit concrete floor slab 1 of a certain length, the free end of the first concrete floor slab 1A and the free play of the second concrete floor slab 1B adjacent to each other in the bridge length direction. Between the ends, a gap 8 (slab track gap 8a, inter-waterway gap 8b, and inter-way gap 8c) that is continuous in the bridge width direction is generated, and construction for preventing water leakage through the gap 8, especially inter-waterway gap 8b. It is indispensable to prevent water leakage between the buildings.

  Conventionally, as a device for preventing water leakage in the railway viaduct, a method of filling an elastic back-up material into the back of the space 8 and then filling a waterproof material such as silicon, or horizontally covering the left and right wings with the slab track 2 The method of water-tightly adhering to the surface of the adhesive is taken, but peeling occurs on the adhesive surface of the silicon or waterproof sheet due to temperature change or strong vibration, and rainwater leaks from the peeling part, There is a problem that it is difficult to properly prevent loose water leakage, and further, there is a problem that the expansion and contraction of the floor slab 1 is not sufficiently absorbed by the silicon filling method and the method of horizontally covering with a sheet material, and the solution thereof is an issue. Yes.

  As shown in FIG. 3, the inventors of the above-mentioned railroad viaduct as a loose water leakage prevention device have a bending elasticity such as a relatively thick rubber sheet on the free end of the first concrete floor slab 1 </ b> A, particularly on the surface of the free end between waterways. The left wing sheet portion 6 of the waterproof sheet 5 having compression elasticity is supported, and the right wing sheet portion 7 of the waterproof sheet 5 is supported on the surface of the free end between the water channels of the second concrete floor slab 1B, and the above-mentioned inter-water channel space 8b is supported. Is covered with the waterproof sheet 5 and bent into a U-shape in the play space 8b, and an iron plate (press plate) 9 is stacked on the surface of the waterproof sheet 5, and the press plate 9 is secured to the floor slabs 1A and 1B with bolts 17. And tightly press the left and right wings of the waterproof sheet 5 to adhere to the surface of the floor slab, while absorbing the expansion and contraction of the concrete floor slabs 1A and 1B at the bent portion 10, and A method to prevent water leakage in 8b It was.

  An attempt was also made on a method of continuously forming the above-described inter-leakage leakage prevention device in the inter-water channel space 8b, the inter-slab track space 8a, and the inter-channel space 8c.

  However, in the structure in which the gap is covered with a waterproof sheet such as a rubber sheet and the waterproof sheet is pressed with a presser plate, peeling leakage due to strong vibration in the preceding example can be eliminated, and sufficient expansion and contraction absorption effect of the concrete slab can be obtained. However, there is a problem that rainwater leaks into the contact interface between the surface of the free end of the concrete floor slab where the left and right wing sheet portions of the waterproof sheet are supported and the back surface of the left and right wing sheet portions of the waterproof sheet, resulting in loose water leakage, Furthermore, there is a problem that rainwater permeates into the concrete surface layer portion of the surface of the free end of the concrete floor slab that supports the right and left wing sheet portions of the waterproof sheet, resulting in loose water leakage. I found a new problem that was difficult to achieve.

  An object of the present invention is to appropriately solve the problems of the idle water leakage prevention device in the railway viaduct.

  In the idle water leakage prevention device according to the present invention, the gap between the free ends of the concrete floor slab in the railway viaduct is covered with a relatively thick waterproof sheet having bending elasticity and compression elasticity, and the left wing sheet portion of the waterproof sheet is covered with the above-mentioned The waterproof sheet is supported on the free end surface of the first concrete floor slab that forms the gap between the water channels and the right wing sheet portion of the waterproof sheet is supported on the free edge surface of the second concrete floor slab. The first permeation waterproofing layer is formed on the surface layer portion of the free end surface of the waterway of the concrete floor slab that supports the left wing sheet portion of the waterproof sheet (the surface of the floor slab low floor), and the A second infiltration waterproofing layer is formed on the surface layer portion of the free end surface of the waterway of the concrete floor slab that supports the right wing sheet portion of the sheet (surface of the floor slab low floor portion), and the rainwater is immersed in the free end surface portion of the concrete floor slab. Prevent leak into, in which a structure for preventing Joint Gap leakage caused thereby.

  Furthermore, in addition to the first and second permeation waterproofing layers, a first covering the surface of the left wing sheet portion of the waterproof sheet and the surface portion of the floor slab of the first concrete floor slab along the edge of the left wing sheet portion. Forming a coated waterproof layer and forming a second coated waterproof layer covering the surface of the right wing sheet portion of the waterproof sheet and the surface portion of the floor slab of the second concrete floor slab along the edge of the right wing sheet portion The structure prevents the rainwater from leaking through the contact interface between the right and left wing sheet portions of the waterproof sheet and the surface of the water channel free end (floor plate low floor portion free end) of the concrete floor slab.

  Therefore, the first and second penetrating waterproof layers, the first and second coated waterproof layers, and the waterproof sheet can be used to reliably achieve the idle water leakage prevention purpose.

  Furthermore, as another example, a water-impervious weir is formed on the free end of the floor slab that forms the water channel of the first concrete floor slab, and the space between the free ends of the both water channels has bending elasticity and compression elasticity. Cover with a waterproof sheet such as a thick rubber sheet and synthetic resin sheet, and support the left wing sheet portion of the waterproof sheet on the surface of the water-impervious weir of the first concrete floor slab, and the right wing sheet portion of the waterproof sheet Supporting the surface of the water-impervious weir of the second concrete floor slab and adopting a configuration in which the intermediate part of the waterproof sheet is bent between the two support parts, the surface layer part of the water-impervious weir of the first concrete floor slab Forming a first osmotic waterproof layer, and forming a second osmotic waterproof layer on the surface layer portion of the water-impervious weir of the second concrete floor slab, and further, the surface of the left wing sheet portion of the waterproof sheet and the left wing sheet portion The first core along the edge opposite to the above gap Forming a first coated waterproof layer that continuously covers the surface portion of the floor slab floor portion of the cleat floor slab, and the opposite end of the right wing sheet portion surface of the waterproof sheet and the free space of the right wing sheet portion Forming a second applied waterproof layer continuously covering the surface portion of the floor slab low floor portion of the second concrete floor slab along the edge, and the right and left wing sheet portions of the waterproof sheet and the surface of the impermeable weir of the concrete floor slab The structure prevents rainwater from leaking through the contact interface.

  Therefore, it is possible to reliably achieve the purpose of preventing the loose water leakage by the cooperation of the water shielding weir, the waterproof sheet, the first and second permeable waterproof layers, and the first and second coated waterproof layers.

  In addition, a structure that presses the surface of the right and left wing sheets of the waterproof sheet with a presser plate is used in combination, and the waterproof sheet, the first and second coated waterproof layers, and the first and second permeable waterproof layers are pressed and intimately contacted. The water leakage prevention effect is improved.

  The presser plate is formed by a single presser plate that presses the surface of the waterproof sheet, or a first presser plate that presses the left wing sheet part of the waterproof sheet and a second presser plate that presses the right wing sheet part of the waterproof sheet. And a clearance is formed between the first presser plate and the second presser plate so that the concrete floor slab can be moved toward and away from each other without being constrained to each other.

  Alternatively, the first presser plate and the second presser plate are connected by an elastic absorption plate that absorbs the expansion and contraction of both concrete floor slabs, and the bent portion of the waterproof sheet is covered with the expansion and contraction absorption plate to prevent rainwater intrusion and deterioration. In addition to preventing, it is possible to follow the expansion and contraction of the concrete slab and to approach and separate.

  According to the present invention, the water leakage preventive device at the railway viaduct causes rainwater to leak into the contact interface between the surface of the free end of the concrete floor slab where the left and right wing sheet portions of the waterproof sheet are contact-supported and the lower surface of the left and right wing sheet portions. This prevents the problem of free water leakage and the problem of rainwater permeating into the concrete surface layer on the free end surface of the above concrete floor slab that contacts and supports the right and left wing sheet parts of the waterproof sheet. Meanwhile, the purpose of absorbing the expansion and contraction of the floor slab can be effectively achieved.

  The best mode for carrying out the present invention will be described with reference to FIGS.

  As described with reference to FIGS. 1 and 2, the concrete slab 1 in a railway viaduct such as the Shinkansen has a protruding slab track 2 extending in the bridge length direction, a recessed water channel 4 and the same passage 3, adjacent to each other. A free space 8 is provided between the free end of the first concrete floor slab 1A and the free end of the second concrete floor slab 1B. The clearance 8 extends continuously in the bridge width direction so as to cross between the free ends of the slab track 2, between the free ends of the water channel 4 and between the free ends of the passage 3.

  As shown in FIGS. 4 and 10, the above-mentioned gap 8, and at least the above-mentioned gap 8b, has a flexible waterproof sheet 5 such as a rubber sheet, that is, a relatively thick waterproof sheet 5 having bending elasticity and compression elasticity. And supporting the left wing sheet portion 6 of the waterproof sheet 5 on the surface of the free end of the first concrete floor slab 1A (the free end of the floor slab low floor portion 29 forming the water channel 4) that forms the clearance 8b. The right wing sheet portion 7 of the waterproof sheet 5 is supported on the surface of the free end of the second concrete floor slab 1B (the free end of the floor slab low floor portion 30 that forms the water channel 4). In the meantime, bend in a U-shape in the gap 8b, or bend in a U-shape on the gap 8b as shown by a broken line, and close the gap 8b against rain water, and the concrete floor slab 1A in the bent portion 10 , 1B to absorb the expansion and contraction. When the bent part 10 is raised upward, it itself constitutes a water-impervious weir.

  The first osmotic waterproof layer 11 is formed on the surface layer portion of the free end surface of the water channel of the concrete floor slab 1A supporting the left wing sheet portion 6 of the waterproof sheet 5 (the surface of the floor slab low floor portion 29), and the right wing of the waterproof sheet 5 A second permeation waterproofing layer 12 is formed on the surface layer portion of the free end surface of the water channel (the surface of the floor slab low floor portion 30) of the concrete floor slab 1B that supports the sheet portion 7, and in the free end surface layer portion of the concrete floor slabs 1A and 1B. The rainwater permeation leakage L2 is prevented, and the loose water leakage L3 caused by this is prevented.

  Furthermore, in addition to the first and second permeation waterproof layers 11 and 12, the floor slab low floor portion of the first concrete floor slab 1A along the surface of the left wing sheet portion 6 of the waterproof sheet 5 and the edge of the left wing sheet portion 6. 29, the first coated waterproof layer 13 that continuously covers the surface portion, and the floor slab of the second concrete slab 1B along the surface of the right wing sheet portion 7 of the waterproof sheet 5 and the edge of the right wing sheet portion 7 A second coated waterproof layer 14 that continuously covers the surface portion of the low floor portion is formed, and the left and right wing sheet portions 6 and 7 of the waterproof sheet 5 and the free end of the water channel of the concrete floor slabs 1A and 1B (the floor slab low floor portion) 29, 30 free ends) Prevents rainwater interface leakage L1 through the contact interface 15 with the surface.

  The inter-leakage leakage prevention device in the railway viaduct shown in FIG. 4 includes a case in which the concrete floor slabs 1A and 1B are continuously formed in the inter-water channel space 8b, the inter-slab track space 8a, and the inter-channel space 8c.

  4 has a stepped portion 33 at the free end of the water channel 4 as shown in FIG. 10, or at the free end of the water channel 4, the free end of the slab track 2, and the free end of the passage 3. A continuous stepped portion 33 is formed, and on the bottom surface of the stepped portion 33, the waterproof sheet 5, the first and second permeable waterproof layers 11 and 12, and the first and second coated waterproof layers 13 and 14, The case where the presser plate 16 described later is constructed is included.

  That is, the free end surfaces of the concrete slabs 1A and 1B are as described above, except that the bottom surface of the water channel 4 (the surfaces of the floor slab lower floor portions 29 and 30) is flat in total length, and the above-mentioned stepped only on the free ends. The case where the L-shaped step part which is a part is formed, or the case where a convex part is formed conversely is included.

  Hereinafter, as a second example, a case will be described in which the impermeable weirs 25 and 26 that are convex portions at the free end of the water channel 4 are formed to constitute an idle water leakage prevention device in the railway viaduct.

  As shown in FIGS. 5A and 5B, the impermeable weir 25 is integrally raised with concrete on the free end of the floor slab low floor portion 29 forming the water channel 4 of the first concrete floor slab 1A.

  Similarly, the impermeable weir 26 is integrally raised with concrete on the free end of the floor slab floor 30 forming the water channel 4 of the second concrete floor slab 1B. The impermeable weirs 25 and 26 are raised so as to be substantially at the same level as the slab track 2.

  As shown in FIG. 6, the free space 8b between the free ends of the water channels 4 is covered with a waterproof sheet 5, and the left wing sheet portion 6 of the waterproof sheet 5 is covered with the surface of the water-impervious weir 25 of the first concrete floor slab 1A. The right wing sheet portion 7 of the waterproof sheet 5 is supported on the surface of the water-impervious weir 26 of the second concrete floor slab 1B, and the intermediate portion of the waterproof sheet 5 is interposed between the both support portions. It bends so that it hangs down in the gap 8b formed between the water weirs 25, 26, or as if it bulges out in a U-shape in the gap 8b as shown by a broken line.

  Further, the first permeation waterproof layer 11 is formed on the surface layer portion of the water-impervious weir 25 of the first concrete floor slab 1A, and the second permeation waterproof layer 12 is formed on the surface layer portion of the water-impervious weir 26 of the second concrete floor slab 1B. To prevent the rainwater seepage and leakage L2 in the free-end surface layer portions of the concrete floor slabs 1A and 1B, and to prevent the loose water leakage L3 resulting therefrom.

  In addition, the surface of the left wing sheet portion 6 of the waterproof sheet 5 and the surface portion of the floor slab low floor portion 29 of the first concrete floor slab 1A along the edge of the left wing sheet portion 6 opposite to the clearance 8b. The second concrete floor slab 1B is formed along the edge of the right wing sheet portion 7 surface of the waterproof sheet 5 and the edge of the right wing sheet portion 7 on the opposite side to the play gap 8b while forming the first coated waterproof layer 13 continuously covering. The second coating waterproof layer 14 is formed so as to continuously cover the surface portion of the floor slab floor portion 30 of the floor slab. , 26 prevents rainwater interface leakage L1 through the contact interface 15 with the surface.

  Preferably, in the loose water leakage prevention device shown in FIGS. 4 and 6, when the first and second osmotic waterproof layers 11 and 12 are formed on the surface layer portions in contact with the left and right wing sheet portions 6 and 7 of the waterproof sheet 5, As described above, the first and second permeation waterproof layers 11, 24 are provided on the surface portions 23, 24 of the both concrete floor slabs 1A, 1B along the edges of the waterproof sheets 5, that is, the edges of the left and right wing sheet portions 6, 7. 12 are formed continuously.

  Therefore, the 1st, 2nd osmosis | permeation waterproofing layers 11 and 12 and the 1st and 2nd application | coating waterproofing layers 13 and 14 are mutually adhere | attached in the surface parts 23 and 24 of concrete floor slab 1A, 1B from which the waterproof sheet 5 interrupted.

  In addition to making the end surfaces of the water-impervious weirs 25 and 26 opposite to the gap 8b into vertical surfaces, the surfaces 27 and 28 are inclined, and the first and second permeable waterproof layers 11 and 12 are connected to the vertical surfaces or The waterproof layer is formed on the surface portions 23 and 24 of the concrete floor slabs 1A and 1B which are formed continuously with the inclined surfaces 27 and 28 or are continuous with the lower end edge of the end surface (vertical surface or inclined surfaces 27 and 28). 11 and 12 are formed continuously.

  Whether the left and right wing sheet portions 6 and 7 of the waterproof sheet 5 described above are simply placed on the floor slab surface, that is, the surfaces of the first and second permeable waterproof layers 11 and 12, or are stacked and fixed with bolts. Fix with adhesive.

  The concrete is permeable to water and passes through the concrete from the portion where the waterproof sheet 5 is interrupted in the first and second permeable waterproof layers 11 and 12 (the portions along the end surfaces of the left and right wing sheet portions 6 and 7). Prevent rainwater seepage leakage L2.

  Further, the first and second permeable waterproof layers 11 and 12 form a smooth thin film on the concrete surface while penetrating the concrete surface layer portion, thereby improving the adhesion between the waterproof sheet 5 and the left and right wing sheet portions 6 and 7. And form a watertight state soundly.

  In addition, the first and second applied waterproof layers 13 and 14 applied to the floor slab surface portions 23 and 24 are firmly adhered to the first and second permeable waterproof layers 11 and 12, thereby improving the watertight effect.

  By means of the above-mentioned idle water leakage prevention device, the water shielding action by the waterproof sheet 5, the penetration leakage prevention action by the first and second permeable waterproof layers 11 and 12, and the interface leakage by the first and second coated waterproof layers 13 and 14 are provided. By the cooperation with the entrance prevention function, it is possible to reliably achieve the idle water leakage prevention purpose with a simple configuration.

  As a means for ensuring the interfacial leakage L1, a layer of a water-swelling water-stopping agent 32 is provided between the free end surfaces of the concrete floor slabs 1A and 1B on which the left and right wing sheet portions 6 and 7 of the waterproof sheet 5 are supported. Form.

  That is, the water-swellable water-stopping agent 32 is formed between the surfaces of the floor slabs 1A and 1B to which the first and second permeable waterproof layers 11 and 12 are applied and the left and right wing sheet portions 6 and 7 of the waterproof sheet 5. This water-swelling water-stopping agent 32 is a chloropyrene rubber blended with a polymer water-absorbing polymer and absorbs water to expand and exhibit a water-stopping effect.

  Further, as shown in FIGS. 4 and 6, the waterproof sheet 5 and the first and second applied waterproof layers 13, 14 and the first and second permeation waterproof layers 11 and 12 and the surfaces of the concrete floor slabs 1A and 1B free ends (including the surfaces of the water-impervious weirs 25 and 26) are press-contacted to improve the effect of preventing the interstitial water leakage. It is a thing.

  As shown in FIGS. 4 and 6, the presser plate 16 is formed of a single presser plate such as a metal plate that presses the surface of the waterproof sheet 5. The presser plate 16 applies surface pressure to the first and second coated waterproof layers 13 and 14 so as to press and adhere to the surfaces of the left and right wing sheet portions 6 and 7 of the waterproof sheet 5, and at the same time, the left and right wing sheet portions 6 and 7. A surface pressure is applied to the surfaces of the first and second permeable waterproof layers 11 and 12 so as to be in pressure contact.

  When a single presser plate 16 is used, a protective plate 31 is interposed between the presser plate 16 and at least one coated waterproof layer 13 or 14, in other words, the protective plate 31 is provided on the surface of the coated waterproof layer 13 or 14. The pressing plate 16 is stacked on the surface of the protective plate 31 so that the pressing plate 16 can slide on the surface of the protective plate 31 following the expansion and contraction of the floor slabs 1A and 1B.

  The presser plate 16 covers the waterproof sheet 5, the first and second permeable waterproof layers 11 and 12, the first and second applied waterproof layers 13 and 14, and prevents deterioration. The curved portion 10 of the waterproof sheet 5 in the gap 8b, the gap between the slab tracks 8a and the gap between the passages 8c) is covered, and rainwater intrusion into the same place is prevented.

  As a fastening means for the presser plate 16, for example, both ends of the presser plate 16 in the bridge length direction are fastened to the free ends of the concrete floor slabs 1A and 1B with bolts 17.

  When the water shielding weirs 25 and 26 are provided, the presser plate 16 is fastened to the water shielding weirs 25 and 26 by bolts 17.

  That is, the bolt 17 includes the presser plate 16, the protection plate 31, the first and second coated waterproof layers 13 and 14, the left and right wing sheet portions 6 and 7 of the waterproof sheet 5, and the first and second penetrating waterproof layers 11 and 14. 12 is fastened to the free ends (including the water-impervious weirs 25 and 26). The head of the bolt 17 is seated on the surface of the presser plate 16 via the packing 22.

  In this case, a long hole 18 that is long in the bridge length direction is provided at the end of the holding plate 16 through which one bolt 17 is inserted, and one bolt 17 is loosely inserted into the long hole 18. Thus, the presser plate 16 can be moved following the expansion and contraction of the concrete slabs 1A and 1B.

  As another example of the presser plate 16, as shown in FIG. 7, a first presser plate 16a and a second presser plate 16b that are separated from each other can be used. That is, the left wing sheet portion 6 of the waterproof sheet 5 is pressed by the first presser plate 16a, the right wing sheet portion 7 of the waterproof sheet 5 is pressed by the second presser plate 16b, and the first and second presser plates 16a, 16b A clearance 20 is formed between the end portions so that the first presser plate 16a and the second presser plate 16b can be moved closer to and away from each other following the expansion and contraction of the concrete floor slabs 1A and 1B.

  As another example of the presser plate 16, as shown in FIGS. 8 and 9, an expansion / contraction absorbing plate 19 for absorbing the expansion and contraction of the both concrete floor slabs 1A and 1B is provided between the first presser plate 16a and the second presser plate 16b. The expansion and contraction absorbing plate 19 covers the bent portion 10 of the waterproof sheet 5 in the gap 8 (the gap between the waterways 8b or the gap between the waterways 8b, the gap between the slab tracks 8a and the gap between the passages 8c), and prevents rainwater intrusion and deterioration. And prevent the concrete floor slabs 1A and 1B from following the expansion and contraction.

  A specific example of the expansion / contraction absorbing plate 19 shown in FIGS. 8 and 9 will be described in detail. As shown in FIG. 8, a first presser plate 16a and a second presser plate 16b that can be separated from each other are used. A hand joint portion 21 of a phase that engages with each other via play 20 is provided at the end of 16a and the end of second presser plate 16b, and is movable in the approaching and separating direction within the range of play 20. At the same time, the bent portion 10 of the waterproof sheet 5 is covered with the hand joint portion 21 of the phase, that is, the expansion and contraction absorbing plate 19.

  FIG. 9 shows that the end portions of the first and second presser plates 16a and 16b are integrally connected with a thin mountain-shaped or bellows-like stretchable absorption plate 19 so that they can be stretched. An example is shown in which both ends are screwed or barbed or welded to the respective ends of the first and second presser plates 16a and 16b.

  Next, specific examples of the first and second permeable waterproof layers 11 and 12 and the first and second coated waterproof layers 13 and 14 will be described.

  As an example of the waterproof material for forming the first and second penetrating waterproof layers 11 and 12, a urethane waterproof material (urethane solvent primer) or an epoxy waterproof material (epoxy solvent primer) is used. An example of blending an epoxy waterproof material is as follows.

<Main agent> (Liquid A)
Epoxy resin 40-50%
Film-forming aids / additives 1-5%
40-50% of water
<Curing agent> (Liquid B)
Modified aliphatic polymian 30-40%
Film-forming aids / additives 1-5%
50-60% water
<Filler> 90-100%

  A urethane waterproof material (urethane polymer resin) is used as an example of a waterproof material for forming the first and second coated waterproof layers 13 and 14. A formulation example is as follows.

<Main agent> (Liquid A)
4,4'-diphenylmethane diisocyanate (MDI) 30-40%
NCO group-terminated urethane prepolymer 45-55%
10-20% plasticizer
<Curing agent> (Liquid B)
Polymian 10-20%
Polyol 75-85%
Color pigment 1-5%
Additive 1-3%

  The waterproof material for forming the first and second penetrating waterproof layers 11 and 12 and the waterproof material for forming the first and second applied waterproof layers 13 and 14 include, as a preferred example, a method of spraying on a construction surface with high pressure. Apply.

  In any of the jet sprays, the A liquid and the B liquid are mixed in advance and then sprayed onto the construction surface. Or it is based on the collision mixing spraying method which sprays A liquid and B liquid simultaneously from a different nozzle, and sprays on a construction surface.

  The first and second coated waterproof layers 13 and 14 are preferably formed to have a relatively thick layer. As the method, the urethane resin waterproof material is formed by the spraying method by the premixing or collision mixing.

  According to the idle water leakage prevention apparatus in the railway viaduct according to the present invention, the problem of rainwater leaking into the contact interface 15 while absorbing the expansion and contraction of the concrete floor slabs 1A, 1B, and the concrete floor slab 1A, The problem that rainwater permeates and leaks into the concrete surface layer portion of the free end surface of 1B can be effectively solved, and the purpose of preventing loose leakage can be appropriately achieved.

The front view of the concrete floor slab in a railway viaduct. The top view which shows the gap between the said floor slabs. Sectional drawing which shows the trial example of the idle water leak prevention apparatus in a railway viaduct. Sectional drawing which shows the 1st example of the idle water leak prevention apparatus in a railway viaduct. A is a plan view of a concrete slab provided with a water shielding weir, and B is a front view of the same. Sectional drawing which shows the 2nd example of the idle water leak prevention apparatus in a railway viaduct. Sectional drawing which shows the 1st structural example of the presser plate in the said 1st example and a 2nd example. Sectional drawing which shows the 2nd structural example of the pressing board in the said 1st example and a 2nd example. Sectional drawing which shows the 3rd structural example of the presser plate in the said 1st example and a 2nd example. Sectional drawing which shows the 3rd example of the idle water leak prevention apparatus in a railway viaduct.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Concrete floor slab, 1A ... 1st concrete floor slab, 1B ... 2nd concrete floor slab, 2 ... Slab track, 3 ... Passage, 4 ... Waterway, 5 ... Waterproof sheet, 6 ... Left wing sheet part, 7 ... Right wing sheet 8, between the slab tracks, 8 b, between the channels, 8 c, between the passages, 10, the curved portion, 11, the first permeation waterproof layer, 12, the second permeation waterproof layer, 13, the first Coating waterproofing layer, 14 ... second coating waterproofing layer, 15 ... contact interface, 16 ... pressing plate, 16a ... first pressing plate, 16b ... second pressing plate, 17 ... bolt, 18 ... long hole, 19 ... extension / absorption plate , 20 ... Play space, play, 21 ... Phase joints, 22 ... Packing, 23, 24 ... Surface portion of concrete floor board, 25, 26 ... Water shielding weir, 27, 28 ... Inclined surface, 29, 30 ... Floor slab Low floor part, 31 ... protection plate, 32 ... water-swelling water-stopping agent, 33 ... stepped part, L1 Interface-leakage, L2 ... penetration-leakage, L3 ... Joint Gap leakage.

Claims (4)

A slab track and a water channel are formed in each of the first concrete floor slab and the second concrete floor slab adjacent to each other in the bridge length direction, and the play of both slab tracks is between the free ends of the first and second concrete floor slabs. A device for preventing leakage of water in a railway viaduct, in which a continuous gap is formed between ends and between free ends of both water channels, wherein the gap between the free ends of both water channels is covered with a waterproof sheet, and the left wing of the waterproof sheet The sheet part is supported on the free end surface of the floor slab floor part that forms the water channel of the first concrete floor slab, and the right wing sheet part of the waterproof sheet is supported by the floor slab low part that forms the water channel of the second concrete floor slab. It is supported on the free end surface of the floor portion, the intermediate portion of the waterproof sheet is bent between the two support portions, and the first end portion of the free end surface layer portion of the floor slab lower floor portion forming the water channel of the first concrete floor slab is formed. In addition to forming a permeable waterproof layer A second permeation waterproof layer is formed on the free end surface layer portion of the floor slab floor forming the water channel of the second concrete floor slab, and the surface of the left wing sheet portion of the waterproof sheet is opposite to the clearance between the left wing sheet portion Forming a first applied waterproof layer that continuously covers the surface portion of the floor slab floor portion forming the water channel of the first concrete floor slab along the side edge, and the right wing sheet surface of the waterproof sheet; Forming a second applied waterproofing layer that continuously covers the surface portion of the floor slab low floor portion that forms the water channel of the second concrete floor slab along the edge opposite to the gap of the right wing sheet portion; An idle water leakage prevention device for railway viaducts. A slab track and a water channel are formed in each of the first concrete floor slab and the second concrete floor slab adjacent to each other in the bridge length direction, and the play of both slab tracks is between the free ends of the first and second concrete floor slabs. A device for preventing leakage between the ends of a railway slab and a free end of a floor slab that forms a water channel of the first concrete floor slab. Forming a water-impervious weir, covering the gap between the free ends of the two water channels with a waterproof sheet, supporting the left wing sheet portion of the waterproof sheet on the surface of the water-impervious weir of the first concrete floor slab, and The right wing sheet part of the sheet is supported on the surface of the water-impervious weir of the second concrete floor slab, the intermediate part of the waterproof sheet is bent between the two support parts, and the surface layer of the water-impervious weir of the first concrete floor slab Form a first penetration waterproofing layer on the part Both form a second infiltration waterproofing layer on the surface layer of the impermeable weir of the second concrete floor slab, and further, the edge of the left wing sheet part of the waterproof sheet and the edge of the left wing sheet part on the opposite side of the play gap Forming a first coated waterproof layer that continuously covers the surface portion of the floor slab floor portion of the first concrete floor slab along the surface of the right wing sheet portion of the waterproof sheet and the free space of the right wing sheet portion A loose water leakage prevention device in a railway viaduct, wherein a second coated waterproof layer is formed to continuously cover the surface portion of the floor slab floor of the second concrete floor slab along the opposite edge. A first presser plate that presses the left wing sheet part of the waterproof sheet and a second presser plate that presses the right wing sheet part of the waterproof sheet, and a gap between the free end of the first presser plate and the free end of the second presser plate. 3. An apparatus for preventing idle water leakage in a railway viaduct according to claim 1 or 2, wherein 4. The loose water leakage prevention device for a railway viaduct according to claim 3, wherein the first presser plate and the second presser plate are connected by an elastic absorption plate that absorbs expansion and contraction of the two concrete slabs.

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