JP4317228B2 - Permeable concrete product for grooves and construction method of permeable concrete product for grooves - Google Patents

Description

  The present invention relates to a permeable concrete product for grooves and a method for constructing a permeable concrete product for grooves, which are installed in the vicinity of a railway track and construct a groove for collecting rainwater existing around the railway.

  2. Description of the Related Art Conventionally, drainage grooves, so-called flumes, embedded in a ballast and laid in the vicinity of a railway track, for example, between tracks and outside each track in a double track section, are known. This type of groove collects rainwater present in the ballast portion and discharges rainwater collected outside the orbit. In order to collect rainwater, for example, a plurality of grooves are formed on the side wall as in Patent Document 1. The permeable concrete product for grooves provided with a through-hole, so-called U-shaped side groove is used.

When a U-shaped side groove having such a through hole is used, the flume is constructed by winding the U-shaped side groove with a nonwoven fabric so that the ballast does not enter the groove from the through hole. The nonwoven fabric is constructed so as to wrap the U-shaped side groove and the lid placed on the upper side.
Japanese Patent Laying-Open No. 2005-9279

  By the way, in the U-shaped side groove used for such a flume, in order to increase the water collecting capacity, the number of through holes is reduced from the above-described configuration, and long holes are provided at predetermined intervals in the height direction of the side wall. Something like that is also considered. In such a U-shaped side groove having a plurality of long holes, the strength of the side wall is reduced by the long holes, so that the thickness of the side wall is made thicker than the conventional one in order to overcome the strength reduction. To do. However, in the case of such a configuration, the side wall becomes thick, so that the weight of the U-shaped side groove itself increases, and handling during construction becomes difficult.

  In addition, since the U-shaped side grooves are generally flat at both end faces, there is a case where a gap is generated at the joint when the track is curved or a sloped section. there were. In general, in the case of a track, for example, if the radius of the curved portion is large but the end face is flat, a gap is formed in the bottom plate portion of the U-shaped side groove that becomes a water channel, and the drainage collected from the gap is discharged. The rainwater that should have flowed into the ballast part.

  In addition to this, the non-woven fabric that prevents the ballast from entering the groove covers the lid fixed to the U-shaped side groove as described above. there were. Therefore, the amount of the nonwoven fabric used is increased more than necessary, which increases the construction cost.

  Therefore, the present invention provides a construction method that can eliminate such problems, can use the nonwoven fabric without waste, and can reduce the construction cost, and is excellent in strength and easy to handle while maintaining a high water collecting capacity. The purpose is to provide concrete products.

That is, the groove construction method using the permeable concrete product for grooves according to the present invention includes a pair of opposing side walls and a bottom plate that connects the lower end portions of the side walls, and at least one of the side walls is present on the outside after installation. A plurality of water-permeable concrete products for grooves comprising a groove member having a water-permeable structure that passes through and a lid member that is sandwiched between at least a part of the side walls of the groove member. When constructing a groove, the continuous groove permeable concrete product is surrounded by a sheet member having water permeability, and the edge of the sheet member is sandwiched and fixed between a side wall and a lid member .

According to such a configuration, the sheet member wraps the bottom plate and the side wall of the groove member, but does not cover the lid member. That is, the sheet member reliably covers the through hole provided in the side wall and is not used for the lid member that does not need to be covered. For this reason, it becomes possible to reduce the usage-amount of a sheet | seat member.

A nonwoven fabric is mentioned as a sheet | seat member. Moreover, a some through-hole is mentioned as a water-permeable structure.

According to such a configuration, it is possible to increase the strength without reducing the water collecting capacity, and it is possible to reduce the weight. In this case, it is possible to further increase the water collecting ability by making the through-holes elongated in the longitudinal direction formed at predetermined intervals.

The water-permeable concrete product for grooves that can be used in the method for constructing a groove using the water-permeable concrete product for grooves of the present invention is known in the art, for example, on the side wall of a normal U-shaped side groove as described in Patent Document 1 above. Are provided with through holes, or are made of porous or water-permeable concrete or synthetic resin on a part or the entire side wall. In particular, as the groove permeable concrete product that can be used in the groove construction method of the groove permeable concrete product of the present invention, the above-mentioned groove member incorporates high-strength deformed reinforcing bars in the side wall and the bottom plate and high strength concrete. A water-permeable concrete product for grooves formed by is preferred.

In order to reduce the leakage of water from the joint portion when the groove is constructed, the groove member is provided with a convex portion on the lower half portion of one end surface of the opposite end surfaces and the other lower half portion. It is preferable to have a concave portion corresponding to the convex portion. In this way, by providing the concave and convex portions on the back end face, even if constructed in a section where the trajectory is curved or a section with a gradient, there is no gap at each joint part, and the It is possible to prevent the drained water from flowing out in the direction of the orbit.

The invention of the present application according to claim 1 is when construction, the sheet member by fixing sandwiched by the cover member, it is possible to reduce the amount of the sheet member.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS.

  The groove permeable concrete product (hereinafter referred to as a groove block) 100 of this embodiment is a groove GV for drainage constructed in the vicinity of a railroad track, that is, a place where ballast is spread (except for a nonwoven fabric which is a sheet member), Used in FIG. 7). The groove block 100 includes a groove member 1 that substantially functions as a groove, and a lid member 2 that is placed on the groove member 1. In this embodiment, the groove block 100 is constituted by two lid members 2 for one groove member 1.

  The groove member 1 includes a pair of opposing side walls 3 and a bottom plate 4 that connects the lower ends of the side walls 3, and is formed of high-strength concrete with a high-strength deformed reinforcing bar 5 built therein. Therefore, the groove member 1 has a substantially U-shaped cross section, and a haunch portion 6 is formed between each side wall 3 and the bottom plate 4. The side wall 3 includes a plurality of through-holes 7 that are long in the height direction at predetermined intervals. The upper edge portion on the inner side of the side wall 3 is chamfered so that the lid member 2 is engaged, and an engaging portion 8 is formed. The through-hole 7 allows water existing outside the groove GV to pass through the groove block 100 when the groove GV is constructed. Apart from such through-holes 7, a round hole 9 for use in loading and unloading of the groove member 1 and movement during construction is formed at substantially the center in the length direction of the side wall 3.

  A convex portion 1c is formed on the lower half portion of one end surface 1a of the opposite end surfaces 1a and 1b of the groove member 1, and the lower half portion of the other end surface 1b corresponds to the convex portion 1c. A recess 1d is formed. The convex portion 1c protrudes from the upper half portion of one end surface 1a, and has a width approximately half of the width of one end surface 1a, in other words, approximately half the thickness of the side wall 3 and the bottom plate 4. ing. The outer surface that forms the convex portion 1 c is formed so as to be flush with the outer surfaces of the side wall 3 and the bottom plate 4. Similarly, the recess 1d is formed so as to recede from the upper half of the other end surface 1b, and is approximately half the width of the other end surface 1b, in other words, the thickness of the side wall 3 and the bottom plate 4. It has a substantially half width and is formed inside the outer surface of the side wall 3 and the bottom plate 4.

  The lid member 2 is fixed in a state where it is slightly dropped between the side walls 3 of the groove member 1. Like the groove member 1, the lid member 2 is formed of high-strength concrete with a high-strength deformed rebar 5 incorporated therein. The lid member 2 has approximately half the length of the groove member 1 and the same width as the width of the groove member 1. The lid member 2 has a width substantially equal to the thickness of the side wall 3 at both edges in the width direction so that the lid member 2 engages with the engaging portion 8 of the side wall 3 on the back surface of the lid member 2. The drop part 2b lower than the center part 2a of the back surface of the is formed. That is, the lid member 2 has a thickness difference between the center portion 2a and the drop portions 2b at both edges, and a step is formed between the two by the drop portion 2b thinner than the center portion 2a. Further, on both side surfaces of the lid member 2 in the width direction, notches 2c are provided at four locations in order to facilitate manual movement and elevation.

As the high-strength deformed reinforcing bar 5 used for the groove member 1 and the lid member 2, for example, those having a yield point of 590 N / mm ² and a tensile strength of 690 N / mm ² are preferable. Further, as the high-strength concrete, for example, one having a design standard strength of 45 N / mm ² is preferable.

  In such a configuration, in the double-track section of the railway, drainage grooves GV are laid between the tracks and outside each track. The groove GV is constructed by continuing a plurality of groove blocks 100. Below, the construction of the groove GV will be described.

  First, a sufficient excavation groove is formed so that the groove block 100 can be embedded in a place where the groove GV is constructed. A foundation crushed stone is laid on the bottom of the excavation groove to form the foundation of the groove block 100. Next, the nonwoven fabric 10 which is a sheet member is spread on the basic crushed stone. The width of the non-woven fabric 10 is set to a dimension sufficient to be woven inside the side walls 3 while covering the bottom plate 4 of the groove member 1 and the outer surfaces of the side walls 3.

  Then, the groove member 1 is arranged on the nonwoven fabric 10 laid on the basic crushed stone. Since the groove member 1 has the convex portion 1c on one end face 1a and the concave portion 1d on the other end portion 1b, adjacent groove members 1 are continuously covered with the concave portion 1d on the convex portion 1c. To be In this case, for example, a join rubber or a water expansion rubber is interposed between the convex portion 1 c and the concave portion 1 d to prevent water leakage at the joint portion of the groove member 1.

  After the groove members 1 are continuously arranged as described above, the nonwoven fabric 10 spreading outside the groove member 1 is lifted along the side wall 3, and the upper end 10a is wrapped around the upper surface 3a of the side wall 3. Hanging inside the side wall 3. In this case, it is preferable that the nonwoven fabric 10 positioned outside the side wall 3 is in a state of being in close contact with the outer surface of the side wall 3, that is, in a state without slack. This state is shown in FIG. In FIG. 5, the nonwoven fabric 10 is illustrated as being transparent, but may be opaque.

  Next, after confirming that the nonwoven fabric 10 wraps the upper surface 3 a of the side wall 3 of the groove member 1 (the state of FIG. 5), the lid member 2 is placed on the upper surface 3 a of the side wall 3. The lid member 2 is positioned in the width direction by the engaging portion 8 inside each side wall 3, but the position is not limited in the longitudinal direction. Therefore, the position is adjusted manually by placing the hand on the notch 2c of the lid member 2, that is, the end surface in the longitudinal direction of the lid member 2 is made substantially coincident with the end surface in the longitudinal direction of the groove member 1. Thus, by placing the lid member 2 on the groove member 1, the vicinity of both edge portions of the nonwoven fabric 10 is sandwiched between the groove member 1 and the lid member 2. Therefore, the nonwoven fabric 10 is fixed in a state of wrapping the groove member 1 of the groove block 100, and closes each through hole 7 formed in the side wall 3 in a water permeable state.

  Thus, since the groove block 100 uses the high-tensile deformed reinforcing bar 5 and the high-strength concrete, the thickness of each of the groove member 1 and the lid member 2 is reduced while corresponding to the strength, that is, the orbital load. Therefore, weight reduction can be realized. And when the length of the groove block 100 is set to 2 meters, for example, since it is lightweight, workability | operativity can be improved, ensuring workability. Moreover, since the water-permeable structure for collecting water is realized in the both side walls 3 by the through holes 7 that are long in the height direction while securing the strength in this way, the water collecting ability can be greatly increased.

  Moreover, since the groove member 1 has the convex part 1c formed in the one end surface 1a of a longitudinal direction, and the recessed part 1d formed in the other end surface 1b, the slope of a longitudinal gradient or the curved part of a track | orbit Even in the case where the drainage groove GV is constructed at the location along the line, the portion where the side wall 3 and the bottom plate 4 overlap is left at the joint portion between the groove members 1. As a result, there is no complete gap that is not in contact between adjacent groove members 1, and the collected rainwater can be effectively prevented from flowing into the ballast.

  Furthermore, since the other end portion always covers one end portion at the joint portion between the groove members 1, the gap at the joint portion of the groove GV can be made inconspicuous.

  Moreover, since the lid member 2 has drop portions 2b at both edges in the width direction, it is not necessary to position the groove member 1 in the width direction when the groove member 1 is closed. Shaking and movement in the width direction can be prevented. In addition, since the cover member 2 is about ½ the length of the groove member 1, it is easy to handle and can improve workability.

  Since the end of the nonwoven fabric is sandwiched between the lid member 2 and the groove member 1 by using such a shape of the lid member 2, the nonwoven fabric outside the lid member 2 that does not need to be constructed can be saved. The amount of non-woven fabric used can be reduced. Therefore, material cost can be reduced and the cost required for construction can be reduced.

  In the above embodiment, a plurality of long through-holes 7 have been described as the water-permeable structure, but may be configured by a plurality of through-holes having a small opening area such as a circle or a polygon. Further, the through hole 7 may be provided only on one side wall 3.

  Moreover, although the nonwoven fabric was demonstrated as a sheet | seat member, in a normal woven fabric or a synthetic resin sheet material, as long as it has favorable water permeability performance and durability performance and also prevents ballast etc., as a sheet member It can be used suitably.

  In addition, the specific configuration of each part is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

The side view of the embodiment of the present invention. The front view of the embodiment. Sectional drawing along the III-III line of FIG. (A) is a front view of the lid member of the embodiment, and (b) is a plan view thereof. The perspective view of the groove member seen from the front in the state which wound the nonwoven fabric in the groove | channel for drainage of the embodiment. The perspective view of the groove member seen from the back surface of the embodiment. The side view of the groove | channel using the embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Groove member 2 ... Lid member 3 ... Side wall 4 ... Bottom plate 5 ... High tension deformed reinforcing bar 7 ... Through-hole 10 ... Nonwoven fabric

Claims (6)

A groove member comprising a pair of opposing side walls and a bottom plate connecting the lower end portions of the side walls, and at least one of the side walls has a water-permeable structure through which water existing outside thereof is passed, and between the side walls of the groove member When a groove is constructed in the vicinity of a railroad track by connecting a plurality of water-permeable concrete products for grooves comprising at least a part of the lid member sandwiched between and in contact with the continuous water-permeable concrete products for grooves A groove construction method using a permeable concrete product for grooves, wherein the sheet member is surrounded by a sheet member having a property and the edge of the sheet member is sandwiched and fixed between a side wall and a lid member . The method for constructing a groove using the water-permeable concrete product for grooves according to claim 1, wherein the sheet member is a nonwoven fabric . The method for constructing a groove using the water-permeable concrete product for grooves according to claim 1 or 2, wherein the water-permeable structure is a plurality of through holes . The grooved permeable concrete product is for constructing a groove in the vicinity of a railway track by connecting a plurality of grooves,
A groove member comprising a plurality of through-holes that include a pair of opposing side walls and a bottom plate that connects the lower end portions of the side walls, and at least one of the side walls allows water existing outside thereof to pass through;
A lid member sandwiched between at least a part of the side walls of the groove member,
4. The method for constructing a groove using a water-permeable concrete product for grooves according to claim 1, wherein the groove member is formed of high-strength concrete while incorporating a high-strength deformed reinforcing bar in the side wall and the bottom plate . The method for constructing a groove using the water-permeable concrete product for grooves according to claim 4 , wherein the through holes are elongated holes formed in the longitudinal direction with a predetermined interval . The groove member according to claim 4 or 5 , wherein the groove member is provided with a convex portion in a lower half portion of one end face of the both end surfaces facing away from each other and a concave portion corresponding to the convex portion in the other lower half portion . How to construct grooves with permeable concrete products.

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