JP6609206B2 - Ground surface temperature control structure and its construction method - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a ground surface temperature control structure for controlling the temperature of a ground surface of a track (track) of an athletic stadium and a construction method thereof, and more particularly, a ground surface for controlling the temperature by circulating a temperature control medium below the ground surface of the track. It is related with a temperature control structure and its construction method.

  The surface temperature of outdoor athletic stadiums can reach 60 ° C or higher in the summer, and it has been pointed out that it affects athletes, such as the sensation of heat and the risk of heat stroke when touching at the start of crouching. As a conventional general countermeasure, the surface is coated with a reflective paint or sprayed with water, but the reflective paint alone has a small cooling effect.

In Patent Document 1, a temperature control pipe is embedded in a road or the like. In summer, cooling is performed by circulating a cooling medium through a temperature control tube, and in winter, heating and snow melting are performed by circulating a heating medium through the temperature control tube.
In Patent Document 2, the temperature is controlled by burying a plurality of temperature control tubes in a planting place such as a soccer ground or a golf course.

JP-A-1-299903 JP 2003-61489 A

As a countermeasure against high temperatures in the summer in the track and field stadium, it is conceivable to cool (temperature control) the ground surface of the track and field of the track and field with a temperature control tube such as Patent Documents 1 and 2 listed above. In that case, if the arrangement depth of the temperature control tube is too close to the ground surface of the runway, the hardness of the ground surface changes, which may give the player a sense of incongruity. On the other hand, if the arrangement depth of the temperature control tube is too large, a sufficient cooling (temperature control) effect cannot be obtained.
In view of the above circumstances, the present invention provides a ground surface temperature control structure capable of preventing a player from feeling uncomfortable while securing a sufficient temperature control effect on the ground surface of a track in an athletic field. For the purpose.

In order to solve the above problems, the structure of the present invention is a ground surface temperature control structure that controls the temperature of the ground surface of the track of an athletic field using a temperature control medium,
A ground surface temperature control structure that controls the temperature of the ground surface of the track and field by a temperature control medium,
The underground structure below the ground surface of the runway has a foundation layer containing asphalt concrete, a filling layer containing elastic granular material laminated on the foundation layer, and a surface layer laminated on the filling layer. And
A temperature control tube for flowing the temperature control medium is disposed on the base layer and embedded in the filling layer, and an upper portion of the filling layer covers the upper side of the temperature control tube. And

Thereby, the temperature of the ground surface of the runway can be controlled. It is possible to suppress changes in the hardness of the ground surface of the runway, and to prevent the player from feeling uncomfortable. Moreover, the arrangement depth of the temperature control tube can be prevented from becoming too large, and a sufficient temperature control effect can be secured.
The elastic granular material is preferably a rubber chip. The binder is preferably a urethane resin.

The method of the present invention is a method for constructing a ground surface temperature control structure that controls the temperature of the ground surface of a track of an athletic stadium with a temperature control medium,
Place the temperature control pipe on the foundation layer containing asphalt concrete,
Next, a packed layer containing elastic granular material is laid on the base layer, the temperature control tube is embedded in the packed layer, and the upper portion of the packed layer is covered on the upper side of the temperature control tube. ,
A surface layer is laid on the packed bed.
Thereby, the temperature of the ground surface of the runway can be controlled. It is possible to reliably suppress changes in the hardness of the ground surface of the runway, and to reliably prevent the player from feeling uncomfortable.

When the track and field stadium is an existing stadium, the existing surface layer of the runway of the existing stadium and the existing filling layer below the existing surface layer are removed, and asphalt concrete below the existing filling layer is further removed. Remove the upper part of the existing foundation layer,
The plurality of temperature control tubes may be arranged on the upper surface of the existing base layer after the removal.
As a result, the existing stadium can be renovated and the ground surface of the runway can be temperature controlled. After the step of arranging the temperature adjusting pipe, it is only necessary to lay the elastic granular material and the binder, and it is not necessary to lay asphalt concrete again.

Alternatively, when the track and field stadium is an existing stadium, the existing surface layer of the runway of the existing stadium, the existing filling layer below the existing surface layer, and the existing foundation layer below the existing filling layer are removed. ,
Thereafter, a new foundation layer containing asphalt concrete may be laid on the ground after the removal so that the thickness is smaller than that of the existing foundation layer, and the temperature control pipe may be disposed on the new foundation layer.
In this case, the existing base layer may be removed in full thickness. There is no need to cut the existing base layer while paying attention to the remaining thickness and level, and the construction can be facilitated.

  ADVANTAGE OF THE INVENTION According to this invention, it can prevent giving an uncomfortable feeling to a player, ensuring sufficient temperature control effect with respect to the ground surface of the track of an athletic field.

FIG. 1 is a plan view schematically showing an athletic stadium in which a ground surface temperature control structure according to a first embodiment of the present invention is constructed. FIG. 2 is a plan view showing an example of a specific structure of the temperature control tube in the circle II in FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4A is a perspective view of a tube fixing member for a straight portion in a temperature control tube. FIG. 4B is a perspective view of the tube fixing member for the folded tube portion in the temperature control tube. FIGS. 5A to 5F are cross-sectional views sequentially showing a construction process for burying a temperature control pipe below the ground surface of a track of an existing track and field stadium. FIG. 6 shows a second embodiment of the present invention, and FIGS. 6A to 6F are cross-sectional views sequentially showing a construction process in which a temperature control pipe is buried under the ground surface of a track of an existing track and field stadium. FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
<First Embodiment>
As shown in FIG. 1, a ground surface temperature control structure that controls the temperature of the ground surface of the track 91 (track) is constructed by renovating the existing track and field stadium 9. The running path 91 (track) has a pair of straight running paths 94 and 94 and a pair of curved running paths 95 and 95, and has an oval shape.

  As shown in FIG. 3, the underground below the ground surface of the runway 91 has a laminated structure in which a crushed stone layer 91d, an underlayer 91c, a packed layer 91b, and a surface layer 91a are laminated in this order from the bottom. The base layer 91c is made of, for example, asphalt concrete, and an upper ascon layer portion 91e having a relatively small particle size is laminated on a lower ascon layer portion 91f having a relatively large particle size.

The packed bed 91b includes elastic granular material 91g. The elastic granular material 91g is preferably composed of a rubber chip. Preferably, the particle size of the resilient granules 91g is smaller than the distance W ₂₀ of the gap between and what later temperature control pipe 20.
Furthermore, the filling layer 91b includes a binder 91h. The elastic granular materials 91g are joined together by the binder 91h. The binder 91h is preferably made of urethane resin.
The thickness t _91b (FIG. 5E) of the filling layer 91 b is larger than the sum of the diameter of the temperature control tube 20 and the thickness of the base portion 41 described later.
The surface layer 91a is made of, for example, a urethane resin.

As shown in FIG. 1, a header pipe 10 and a temperature control pipe 20 are provided below the ground surface of the ground 90 of the athletic stadium 9. The header tube 10 and the temperature control tube 20 serve as a passage for the temperature control medium A, and the temperature of the runway 91 is controlled.
Water is used as the temperature control medium A. The temperature adjustment medium A is not limited to water, and brine or the like may be used.

  The header pipe 10 extends under the ground surfaces of the fields 92 and 93 so as to be parallel to the runway 91. Preferably, the header pipe 10 is mainly piped inside the drain pipe 80 of the in-field 92. A part of the header pipe 10 is piped inside the drain pipe 86 of the outfield 93.

  Of the header pipe 10, the upstream end of the header pipe 10 on the supply side is connected to a delivery port 2a of the chiller 2 (temperature control source). The downstream end of the header pipe 10 on the discharge side is connected to the reflux port 2 b of the chiller 2. The downstream end of the supply-side header pipe 10 and the upstream end of the discharge-side header pipe 10 are closed.

The installation location of the chiller 2 can be arbitrarily set, and may be, for example, a corner of a stand (audience seat) of the athletic stadium 9.
The temperature control source is not limited to the chiller 2, and underground heat (cold heat or heat) may be used, or heat may be exchanged using a water tank attached to the athletic stadium 9.

  As shown in FIG. 1, a plurality of temperature control tubes 20, 20... Are provided below the ground surface of the runway 91. The temperature control tube 20 is made of a resin such as polyethylene, for example. The flow path cross-sectional area of each temperature control tube 20 is sufficiently smaller than the flow path cross-sectional area of the header pipe 10.

The plurality of temperature control tubes 20, 20... Are arranged in the extending direction of the runway 91. Each temperature control tube 20 intersects with the extending direction of the runway 91 at the place where the temperature control tube 20 is disposed. Of the running road 91, each temperature control tube 20 of the straight running path 94 is orthogonal to the straight running path 94. The temperature control tubes 20, 20 of the curved path 95 are arranged radially from the inner periphery side to the outer periphery side of the curved path 95, but the temperature control tubes 20, 20 of the curved path 95 are They may be arranged parallel to each other.
The extending direction of the temperature control tube 20 is not limited to the direction intersecting the extending direction of the runway 91, and may be along the extending direction of the runway 91.

The temperature control tube 20 is a round-trip path having a turn-back except for a part thereof.
The temperature control tube 20 passing through the runway overlap portion 96 is a one-way road that does not turn back. The plurality of temperature control tubes 20, 20... Passing through the runway overlap portion 96 constitute a parallel flow, but adjacent ones may constitute a counter flow.

The upstream end of each temperature control pipe 20 is connected to the header pipe 10 on the supply side. And the downstream end of each temperature control pipe | tube 20 is connected to the header pipe | tube 10 by the side of discharge | emission.
The temperature control medium A temperature-controlled in the chiller 2 is distributed from the header pipe 10 on the supply side to the temperature control pipes 20, 20. As the temperature control medium A flows in each temperature control tube 20, the ground surface of the runway 91 is cooled (temperature control). The temperature control medium A from the temperature control tubes 20, 20... Is collected by the header tube 10 on the discharge side and returned to the chiller 2.

  In FIG. 1, for convenience of drawing, the arrangement intervals of the temperature control tubes 20 are sparse, but the temperature adjustment tubes 20 may be arranged densely at a narrow interval (see FIG. 2). Further, as shown in FIG. 2, one temperature control unit 29 may be configured by a certain number of temperature control tubes 20, 20. A plurality of temperature control units 29 may be arranged densely at a narrow interval. It is preferable that the temperature control pipes 20, 20,... Of the temperature control pipe units 29 in the straight running path 94 and the curved running path 95 (excluding the running path overlapping portion 96) are arranged so as to form a multiple ring shape. Furthermore, it is preferable that the temperature control tubes 20 and 20 adjacent to each temperature control unit 29 constitute an opposing flow.

As shown in FIG. 3, the temperature control tube 20 is embedded on the filling layer 91b by being disposed on the base layer 91c.
The elastic granular material 91g and the binder 91h of the filling layer 91b are filled between the adjacent temperature control tubes 20 and are covered on the upper side of each temperature control tube 20.
The thickness of the upper portion than the temperature control pipe 20 in the filling layer 91b, that is, the height _{H 9} from the top to the upper surface of the filling layer 91b of the temperature control pipe 20 is preferably _H 9 = 10 mm to 20 mm approximately.

  As shown in FIGS. 2 and 3, the temperature adjustment tube 20 is held by a tube fixing member 40. As a material of the tube fixing member 40, it is preferable to have a required strength and heat resistance and to have elasticity that allows the temperature adjusting tube 20 to be fitted and held. Examples of such a material include resins such as polypropylene (PP) and acrylonitrile / butadiene / styrene resin (ABS), preferably ABS, but are not necessarily limited thereto.

  FIG. 4A shows a tube fixing member 40 that holds the straight portion of the temperature control tube 20. The tube fixing member 40 includes a base portion 41 and a plurality of holding portions 42. The base portion 41 has a square (quadrangle) frame shape. The base portion 41 has a plurality of large holes 41c. The hole 41c penetrates the base 41 in the thickness direction. A plurality of holding portions 42 are provided at equal intervals along two opposing edges of the base portion 41. Each holding part 42 has a pair of holding claws 42a, 42a. As shown in FIG. 3, the temperature adjustment tube 20 is fitted in the holding portion 42.

  FIG. 4B shows the tube fixing member 40 that holds the folded portion of the temperature control tube 20. When the tube fixing member 40 for the folded portion is particularly distinguished from the tube fixing member 40 for the straight portion (FIG. 4A), it is expressed as “tube fixing member 40C”. In the tube fixing member 40C, a plurality of holding portions 42 are concentrically arranged on the base portion 41.

  As shown in FIGS. 2 and 3, a plurality of tube fixing members 40, 40... Are laid on the upper surface of the base layer 91c (the boundary between the filling layer 91b and the base layer 91c) vertically and horizontally. The base portion 41 of each tube fixing member 40 is sandwiched between the filling layer 91b and the foundation layer 91c. Although detailed illustration is omitted, the filling layer 91b and the base layer 91c are in direct contact with each other when the filling layer 91b enters the hole 41c.

A method for constructing the ground surface temperature control structure in the existing track and field stadium 9 will be described focusing on a method for burying the temperature control pipe 20.
As shown in FIG. 5A, the thickness t _{91b ′} of the existing packed bed 91b ′ in the existing runway 91 ′ before the construction of the ground surface temperature control structure is the same as that of the packed bed 91b after the construction (FIG. 5F). It is smaller than the thickness t _91b (t _{91b ′} <t _91b ). Further, the thickness of the existing ascon layer portion 91e ′ before the construction of the ground surface temperature control structure is larger than the thickness of the ascon layer portion 91e after the construction ((f) in the same figure).
As shown in FIG. 5 (b), the existing surface layer 91a 'and the existing filling layer 91b' of the existing runway 91 'are removed. Further, the upper portion 91ea of the existing ascon layer portion 91e ′ is also scraped away. Preferably, the thickness t _91ea of the removed portion 91ea is set to be approximately the same as the height H ₂ (FIG. 5 (c)) from the bottom surface of the tube fixing member 40 to the top of the temperature control tube 20 in the _{assembled state} (t _91ea ≈H ₂ ). Since the height H ₂ is substantially equal to the diameter of the temperature control pipe 20, in short, the upper portion 91ea of the existing asphalt concrete layer portion 91e ', preferably diameter portion of a depth of about temperature control pipe 20, to remove I zag.

  As shown in FIG.5 (c), the pipe fixing member 40 is mounted in the upper surface of the ascon layer part 91e after removing the said upper part 91ea. The temperature adjustment tube 20 is piped on the tube fixing member 40 and the temperature adjustment tube 20 is fitted into the holding portion 42.

Next, as shown in FIG. 5 (d), the elastic granular material 91 g is spread on the tube fixing member 40 and between the temperature control tubes 20 between adjacent temperature control tubes 20. The elastic granular material 91 g is spread higher than the top of the temperature control tube 20. Subsequently, as shown in FIG. 5E, the binder 91h is poured between the elastic granular materials 91g.
In short, the elastic granular material 91g and the binder 91h are filled between the adjacent temperature control tubes 20 and covered on the upper side of the temperature control tube 20. Thereby, the temperature control tube 20 is embedded in the new packed bed 91b. Preferably, the thickness t _91b of the new packed bed 91b is the sum of the thickness t _{91b ′} of the existing packed bed 91b ′ before the construction of the ground surface temperature control structure and the thickness t _91ea of the removed portion 91ea of the ascon layer 91e ′. (T _{91b ≈t 91b ′} + t _91ea ). Thereby, the height of the ground surface of the runway 91 can be made the same level as before the construction of the ground surface temperature control structure.
After the temperature adjusting pipe 20 is arranged, the elastic granular material 91g and the binder 91h may be laid, and it is not necessary to lay asphalt concrete as the ascon layer portion 91e again. Therefore, construction construction of the ground surface temperature control structure can be simplified.
Thereafter, as shown in FIG. 5F, a surface layer 91a is laid on the packed bed 91b.

  According to the ground surface temperature control structure thus constructed, the temperature control pipe 20 can be disposed at a depth corresponding to the existing ascon layer portion 91e ′ before the construction of the ground surface temperature control structure. It is possible to suppress changes in the hardness of the ground surface. Therefore, it is possible to prevent the player from feeling uncomfortable. In addition, the arrangement depth of the temperature adjustment tube 20 can be prevented from becoming too large, and a sufficient temperature adjustment effect can be ensured.

Next, another embodiment of the present invention will be described. In the following embodiments, the same reference numerals are given to the drawings for the same configurations as those already described, and the description thereof is omitted.
Second Embodiment
FIG. 6 shows a second embodiment of the present invention. 2nd Embodiment concerns on the deformation | transformation aspect of the method of building a ground surface temperature control structure in the existing track and field stadium.
As shown in FIGS. 6A to 6B, the existing surface layer 91a ′, the existing filling layer 91b ′, and the existing base layer 91c ′ are removed from the existing runway 91 ′ before the construction of the ground surface temperature control structure. . That is, not only the existing surface layer 91a ′ and the existing filling layer 91b ′ but also the existing base layer 91c ′ are removed in full thickness. The upper existing ascon layer portion 91e ′ is removed in full thickness, and the lower existing ascon layer portion 91f ′ is also removed in full thickness.
Thereby, the crushed stone layer 91d is exposed.

And as shown in FIG.6 (c), the new foundation layer 91c is formed by laying asphalt concrete on the ground after removal, ie, the crushed stone layer 91d. Preferably, the lower portion of the newly provided base layer 91c is a relatively large particle size ascon layer portion 91f, and the upper portion is a relatively small particle size ascon layer portion 91e. The thickness t _91c (total thickness of the upper and lower ascon layer portions 91e and 91f) of the new foundation layer 91c is made smaller than the thickness t _{91c ′} of the existing foundation layer 91c ′ (t _91c <t _{91c ′} ).

Thereafter, the tube fixing member 40 is placed on the newly provided base layer 91c and the temperature control tube 20 is piped (FIG. 6 (d)). Subsequently, in the packed layer 91b composed of the elastic granular material 91g and the binder 91h. The temperature control tube 20 is embedded (FIG. 6E), and the surface layer 91a is laid on the packed bed 91b (FIG. 6F). The thickness t _91b (FIG. 6 (e)) of the new filling layer 91b is made larger than the thickness t _{91b ′} (FIG. 6 (a)) of the existing filling layer 91b ′ (t _91b > t _{91b ′} ). Preferably, the total thickness (t _91b + t _91c ) of the new foundation layer 91c and the new filling layer 91b is approximately the same as the total thickness (t _{91b ′} + t _{91c ′} ) of the existing foundation layer 91c ′ and the existing filling layer 91b ′. (T _91b + t _{91c ≈t 91b ′} + t _{91c ′} ). Thereby, the height of the ground surface of the runway 91 can be made the same level as before the construction of the ground surface temperature control structure.

  According to the construction method of the second embodiment, when the existing base layer 91c 'is removed, it is not necessary to scrape while paying attention to the remaining thickness and levelness, and the construction can be facilitated. The larger the installation area of the ground surface temperature control structure, the greater the burden reduction effect when removing the existing base layer 91c '. Therefore, it is particularly effective when a ground surface temperature control structure is constructed throughout the track and field stadium.

The present invention is not limited to the embodiment described above, and various modifications can be made without departing from the spirit of the invention.
For example, the present invention is not limited to the existing track and field stadium 9, and can naturally be applied to the case where a track and field stadium is newly established. In that case, the thickness is made smaller than usual when the ascon layer 91e is laid (see FIG. 5B). After the pipe fixing member 40 and the temperature control pipe 20 are disposed on the ascon layer 91e (see FIG. 5C), the elastic granular material 91g and the binder 91h are filled between the adjacent temperature control pipes 20. At the same time, the filling layer 91b is laid thicker than usual by covering the temperature control tube 20 above (see FIG. 5E). Then, the surface layer 91a is laid on the filling layer 91b (see FIG. 5 (f)).
A heat medium may be used as the temperature control medium A. The ground surface temperature control structure may be used not only as a cooling device but also as a heating device or a snow melting device.

  The present invention is applicable to, for example, a cooling system that cools the ground surface of a track (track) in an athletic stadium.

A Water (temperature control medium)
20 Temperature control pipe 29 Temperature control unit 9 Athletic field 91 Track 91a Surface layer 91a 'Existing surface layer 91b Filled layer 91b' Existing packed layer 91c Underlayer 91ea Removal part 91f Underlayer 91f 'Existing foundation layer 91g Elastic granular material

Claims (5)

A ground surface temperature control structure that controls the temperature of the ground surface of the track and field by a temperature control medium,
The underground structure below the ground surface of the runway has a foundation layer containing asphalt concrete, a filling layer containing elastic granular material laminated on the foundation layer, and a surface layer laminated on the filling layer. And
A plurality of temperature control tubes for flowing the temperature control medium are disposed on the base layer and embedded in the packed layer, and the upper portion of the packed layer covers the upper side of the temperature controlled tube ,
A tube fixing member is laid on the upper surface of the base layer, and the tube fixing member has a frame-like base formed so that a plurality of holes passing through the elastic granular material penetrate from the upper surface to the bottom surface. And a plurality of holding portions formed side by side on the upper surface of the base portion, wherein the plurality of temperature control tubes are held by the corresponding holding portions, respectively . The resilient granules Ri rubber chips der,
Said filler layer further comprises a binder to bind the resilient granules each other, said filling layer has a that you have contact directly with the underlying layer through the hole claim 1 on the ground surface temperature according Tonal structure. A method of constructing a ground surface temperature control structure that controls the temperature of the ground surface of an athletic field using a temperature control medium,
Place the temperature control pipe on the foundation layer containing asphalt concrete,
Next, a packed layer containing elastic granular material is laid on the base layer, the temperature control tube is embedded in the packed layer, and the upper portion of the packed layer is covered on the upper side of the temperature control tube. ,
A construction method of a ground surface temperature control structure, wherein a surface layer is laid on the packed bed. The athletic stadium is an existing stadium,
Removing the existing surface layer of the runway of the existing stadium and the existing filling layer below the existing surface layer, and further removing the upper part of the existing foundation layer containing asphalt concrete below the existing filling layer;
The construction method of the ground surface temperature control structure according to claim 3, wherein the temperature control pipe is disposed on an upper surface of the existing base layer after the removal. The athletic stadium is an existing stadium,
Removing the existing surface layer of the runway of the existing stadium, the existing filling layer below the existing surface layer, and the existing foundation layer below the existing filling layer;
Then, laying a new foundation layer containing asphalt concrete on the ground after the removal so that the thickness is smaller than the existing foundation layer,
The construction method of the ground surface temperature control structure according to claim 3, wherein the temperature control pipe is disposed on the new foundation layer.

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