JP2001164508A - Method of repairing paving surface and sport ground - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply construct a protective layer having required strength and flatness as the foundation of an artificial-lawn sport ground on an existing paving surface such as clay. SOLUTION: A plurality of rails 3 are installed in parallel on the existing paving surface 1 such as clay, a crushed stone or the like as height in which the top ends of each rail are distributed in approximately the same plane, a stable aggregate layer is manufactured by flatly laying and leveling and rolling aggregate 21 scattered among the adjacent two rails 3 by a ruler 4 stretched among the rails, and the aggregate layer is coated with a solidifying liquid and the flat and firm protective layer 2 is formed on the existing paving surface 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a pavement surface and an athletic stadium, and more particularly to a method for repairing an existing pavement surface such as clay or crushed stone to an artificial turf pavement surface. , Which relates to the athletic stadium renovated as a result.

[0002]

2. Description of the Related Art For example, when an athletic stadium such as a tennis court made of clay-based pavement is renovated into artificial turf pavement, a protective layer is formed on the existing pavement surface using asphalt concrete or cement concrete and the like. There is a repair method of laying artificial turf, however, according to this method, the newly provided protective layer raises the surface of the artificial turf, which causes a problem that the accommodation with surrounding existing facilities is deteriorated.

As another repair method, there is a repair method in which a surface layer of a clay-based pavement surface is dug up, a cement-based or resin-based solidifying material is charged and agitated and mixed, and then the surface layer is leveled and solidified. According to this, the renovated surface can be finished to be almost the same as the original pavement surface, but not only is it difficult to dig up the surface layer and it costs much work, but also it is difficult to mix the solidified material uniformly, There is a high possibility that the variation will occur.

[0004] In order to solve these problems, the present applicant has previously applied a fixation liquid on an existing pavement surface, and sprayed an aggregate made of, for example, crushed stone to a predetermined thickness on the fixation liquid. After a protective layer is provided, a flat layer is laminated on the protective layer to lay an artificial turf (Japanese Patent Application Laid-Open No. 10-219618).

According to this method, it is not necessary to dig up the existing pavement surface, so that the construction cost can be reduced, and the athletic competition can be achieved by the compaction of the existing pavement surface and the flat layer formed on the protective layer. The required flatness and strength of the field can be ensured.

[0006]

However, since then, some problems have been raised in this repair method. That is, since the procedure of dispersing the aggregate after the application of the fixation liquid is performed, the thickness of the aggregate and the application amount of the fixation liquid are inevitable depending on the method of dispersing the aggregate and applying the fixation liquid.

[0007] Therefore, in a portion where the amount of the fixing liquid is small and the amount of the aggregate is large, the fixing strength is reduced, and as a result, the surface strength is insufficient. In addition, unevenness may occur due to variation in the amount of aggregate scattered. In addition, in this repair method, a flat layer is further required on the protective layer in order to ensure flatness, and the construction period is lengthened accordingly.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a protective layer having necessary strength and flatness as a base of an athletic stadium. An object of the present invention is to provide a method for repairing a pavement surface which can be more easily constructed.

It is another object of the present invention to provide an athletic stadium with artificial turf pavement in which a protective layer is firm and can maintain flatness for a long time.

In order to achieve the first object, the present invention relates to a pavement surface repairing method for repairing an existing pavement surface to a flat surface having a uniform predetermined strength, wherein a plurality of rails are provided on the existing pavement surface. After each rail top is installed in parallel at a height distributed almost in the same plane, the aggregates spread between two adjacent rails are spread evenly with a constant wood spread between the rails. Then, a stable aggregate layer is formed by rolling, and a fixing liquid is applied to the aggregate layer to form a protective layer on the existing pavement surface.

According to this, a protective layer having the necessary strength and flatness required as a base for the athletic stadium can be more easily constructed on the existing pavement surface without the need for skilled work.
In particular, the artificial turf can be laid directly on the protective layer without requiring a flat layer. Note that the protective layer may be a plurality of layers as necessary. The aggregate to be used preferably has an average particle size of 0.1 to 15 mm, particularly 2.5 to 5 mm, and is preferably No. 7 crushed stone from the viewpoint of easy availability.

The existing pavement surface to be repaired by the present invention is mainly a clay or crushed stone tennis court surface, but may be a so-called vacant land. More specifically, it is not used as a clay-based pavement surface such as clay or antuca and a pavement surface on which a crushed stone layer is laminated to correct the slope of the clay-based pavement surface, a tennis court or other sports ground, In this case, a vacant lot having a size enough to be used and a pavement surface on which a crushed stone layer is laminated on the vacant lot for slope correction can be a target of the present invention.

In the present invention, a first fixing liquid having a relatively high viscosity and a second fixing liquid having a relatively high permeability are used as the fixing liquid, and the first fixing liquid is applied to the aggregate layer. It is preferable to apply the second fixing liquid. According to this, first, since the surface side of the aggregate layer is bonded by the first fixing liquid, it is possible to prevent the aggregate from dropping and releasing due to external force,
The bonding of the whole aggregate layer is achieved by the high permeability of the second fixing liquid applied thereafter.

According to a preferred aspect of the present invention, in order to further improve the flatness of the protective layer, the existing pavement surface is flattened before the formation of the protective layer. This flattening treatment may be rolling with a Macadam roller.

The present invention does not exclude that a flat layer for obtaining high flatness is further formed on the protective layer by a coating method. This flat layer may be additionally provided, for example, when there is only one protective layer.

The present invention also includes an embodiment in which artificial turf is laid directly or via a flat layer on the protective layer, whereby an existing pavement surface such as clay or crushed stone is modified into an artificial turf pavement surface. You.

[0017] In order to achieve the second object, the athletic stadium of the present invention is laid flat on an existing pavement surface such as clay-based, crushed-stone or vacant land, and It is characterized by having a protective layer formed by applying a fixation liquid to the rolled aggregate layer, and laying artificial turf containing sand directly or through a predetermined flat layer on this protective layer. In addition, an athletic stadium with artificial turf pavement having a strong protective layer and capable of maintaining flatness for a long time can be obtained.

The artificial turf containing sand is a general term for artificial turf in which granular materials are filled in a layer of a predetermined thickness in grass.
The granular material to be filled may be, for example, a simple substance such as sand, rubber chips, cork chips, and pulverized resin, or a mixture thereof.

[0019]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a perspective view of FIG. 1 and a sectional view thereof.
When repairing the existing pavement surface 1, a rail 3 and a fixed wood 4 are first used as a work jig. The existing pavement surface 1 to be repaired in this embodiment
Is an old-fashioned tennis court made of clay.

In the rehabilitation method of the present invention, the rail 3 and the fixed wood 4 are for leveling the protection layer 2 by laying it evenly on the existing pavement surface 1. Since a predetermined load is applied to the rail 3 when the protective layer 2 is spread,
Robustness that can maintain linearity against the load is required.

The rail 3 is actually a plurality of rail members 3
1 are connected to each other to be installed on the existing pavement surface 1. From the viewpoint of easy availability, the rail material 31 is a circular steel pipe having a diameter of about 30 to 50 mm or a vertical and horizontal cross section. Is 30 × 50mm ～ 50 × 50mm
A square steel pipe of a certain degree is preferred. The length is preferably about 3 to 5 m in consideration of handleability.

By connecting the rail members 31 to one rail 3
In this case, by using a commercially available nested joint (not shown) for connecting the rail members 31, it is possible to prevent bending at the connecting portion and to maintain linearity without generating a step. it can.

When the rails 3 connecting the plurality of rail members 31 are installed on the existing pavement surface 1 in parallel with each other, the tops (upper surfaces) of the rails 3 are distributed substantially in the same plane. Its height is adjusted to be (exist). That is, when the existing pavement surface 1 has unevenness, the height of each rail 3 is adjusted by shaving the high place and biting a support tree or the like at the low place. In addition,
The rail 3 may be removed after the protection layer 2 is constructed, or may be embedded in the existing pavement surface 1 and used as it is.

Here, regarding the height adjustment of each rail 3,
The distribution (existence) of the tops in substantially the same plane does not necessarily mean only when the tops of the rails are at the same height (same horizontal plane). For example, a predetermined slope is provided on the tennis court surface in consideration of drainage. In such a case, the height of the top end of each rail 3 is adjusted such that the height measured from the reference plane is substantially the same with the slope plane as the reference plane.

The fixed wood 4 is made of a long plate-like body, such as a steel plate, which is not easily deformed when the protective layer 2 is spread, and whose lower edge is finished with a flat surface 41. Rail 3,
What is necessary is just to have the length spanned between three. The shape of the part of the fixed wood 4 supported by the rail 3 is
It is appropriately determined depending on the installation height of the rail 3 and the thickness of the protective layer 2 to be formed.

That is, when assuming that the rail 3 is to be removed after the protection layer 2 is constructed, preferably, engaging steps 42, 42 for the rail 3 are provided at both ends of the fixed wood 4,
Depending on the thickness of the protective layer 2 to be obtained, the engagement step 4
A depth h of 2,42 will be selected.

For example, when a square steel pipe of 50 × 50 mm is used for the rail 3, the depth h of the engaging step portions 42 is set to, for example, 40 mm from the upper surface (top end) of the rail, thereby increasing the thickness. A 10 mm protective layer 2 will be obtained. As described above, by reducing the thickness of the protective layer 2 with respect to the installation height of the rail 3, it is possible to minimize the destruction of the protective layer 2 when removing the rail 3.

If it is assumed that the rails 3 are to be embedded without being removed, the height at which the rails 3 are installed becomes the finishing height of the protective layer 2. The step portions 42, 42 are not necessary,
May be a simple plate or a bar having only the flat surface 41.

The protective layer 2 has an average particle size of 0.1 to 15
mm, preferably an aggregate 21 made of crushed stone having an average particle diameter of 2.5 to 5.0 mm is used. However, since the aggregate 21 spread by the fixed wood 4 is in a state of easy movement, the next fixation liquid application is performed. Flatness may be impaired in the coating operation in the process.

Therefore, it is preferable that the aggregates 21 are entangled with each other by rolling to impart strength to the protective layer 2 so that the flatness is not impaired at the time of applying the fixing liquid. No special machine is required for this compaction, and a compaction machine such as a Macadam roller for road pavement work may be used.

After the compaction, the aggregates 21 are prevented from falling off (release) from the surface of the protective layer, the aggregates 21 are firmly bonded to each other, and the protective layer 2 and the existing pavement surface 1 are integrated. Fixing liquid 22 is applied on the protective layer 2 for the purpose of
Is applied. That is, the fixing liquid used here includes:
It is required to have a function of forming a film on the surface of the protective layer 2 to prevent the aggregate 21 from falling off, while having a function of penetrating between the aggregates 21 and connecting the existing pavement surface 1 and the protective layer 2.

For this reason, it is necessary that the fixing liquid 22 appropriately has both permeability and viscosity. However, it is not easy to obtain a fixing liquid having both of these properties. Therefore, it is preferable to use the first fixing liquid having a relatively high viscosity and the second fixing liquid having a relatively high permeability in combination. According to this, first, the surface of the protective layer 2 is bonded with the first fixing liquid, and then the protective layer 2 is bonded with the second fixing liquid.
The internal aggregates 21 can be joined together, and the protective layer 2 and the existing pavement surface 1 can be joined together.

It is more preferable that the two kinds of fixing liquids are made of a material having high reactivity such as ionic bond, since the curing is accelerated. As long as it has such properties and hardens in a certain period of time, its material such as various emulsions, solvents, and solventless liquid resins is not particularly limited. From the viewpoint of cost, it is preferable to use, for example, asphalt emulsion PK-3 as the first fixing liquid and then use, for example, cement milk as the second fixing liquid.

Next, a series of procedures for repairing the existing pavement surface 1 (for example, a clay-based tennis court) to artificial sand containing sand will be described with reference to FIGS. In this example, the rail is removed after forming the protective layer.

First, referring to FIG. 3, as a preparation step before the rail 3 is installed, the existing pavement surface 1 is carefully rolled in advance by macadam rollers. As one guide, the rolling is performed by a static load of 490 kPa (5 hgf / cm ² ) after the rolling until the existing pavement surface 1 does not show subsidence.

When the slope (1/150 to 1/200) required as a tennis court is not maintained on the existing pavement surface 1, as shown in FIG. To correct the gradient. This crushed stone layer 11
In order to construct a crushed stone, for example, crushed stone that is easily tightened by rolling with a granulated crushed stone M-30 or the like and that easily provides flatness is preferable.

Next, as shown in FIG. 5, a plurality of rails 3 are installed on the existing pavement surface 1 in parallel with each other. Although only two rails 3 and 3 are shown in FIG. 5 for convenience of drawing, actually more rails are installed. The distance between the rails 3 and 3 is 2 to 4 m in consideration of the fact that the fixed wood 4 does not bend and the ease with which the fixing liquid can be applied.
Is appropriate.

Further, the height of each rail 3 is adjusted so as to be substantially the same as a predetermined reference surface (in this example, the inclined surface of the crushed stone layer 11). That is, by measuring the joint portion of the rail 3 and the level therebetween, the rail 3 is partially raised, or the existing pavement surface 1 is partially cut, and the top end of each rail 3 is substantially the same as the reference surface. Height.

Next, the aggregates 21 are placed in the lanes of the rails 3 and 3.
(Eg, No. 7 crushed stone) is evenly spread using a shovel or the like, and preferably spread easily using a rake or the like, and then the fixed wood 4 is stretched between the rails 3 and 3 and moved in the lane direction. The aggregates 21 are spread. In this case, in order to reduce the resistance that the fixed wood 4 receives from the aggregate 21,
It is advisable to carry out spreading work while moving the fixed tree 4 in small increments in a direction orthogonal to the lane direction.

In order to spread the aggregate 21 to a thickness of 10 mm using, for example, a square steel tube of 50 × 50 mm for the rail 3, as described earlier with reference to FIG. The fixed wood 4 having the steps 42 may be used.

After the aggregates 21 have been spread and spread on the fixed wood 4, FIG.
As shown in (2), the aggregate 21 is compacted using the Macadam roller 5 as compacting means. Thereby, the gap between the aggregates 21 is crushed, and an effect of engaging the aggregates 21 is generated, so that high surface strength is obtained.

Next, as shown in FIG. 7, the fixing liquid 22 is applied uniformly. When the asphalt emulsion PK-3 is used as the fixing liquid 22, the coating amount is preferably about 0.5 to 3.0 liters per square meter. The coating amount is 0.
If the amount is less than 5 l / m ² , the asphalt emulsion does not easily penetrate into the aggregate layer, and poor adhesion between the aggregates 21 and the existing pavement surface 1 occurs, and the necessary strength as a base for a newly established tennis court is obtained. May not be possible.

In consideration of the viscosity of the asphalt emulsion, when the coating amount is 3.0 l / m ² or more, the emulsion floats on the surface of the aggregate layer to form a film and penetrates into the inside. It is easily anticipated that they will not go. In particular, when the temperature is high, the asphalt emulsion dries and hardens before it penetrates, and only the emulsion film spreads on the surface of the aggregate layer.

As a method for improving this point, there is a method in which the aggregate 21 is provided with water in advance. According to this, the asphalt emulsion easily penetrates into the aggregate layer due to the presence of the water. In this case, since the emulsion is slightly diluted by moisture, it is desirable to increase the coating amount of the asphalt emulsion from the above-mentioned coating amount (1.0 to 3.0 l / m ² ).

Depending on the flatness and supporting strength of the existing pavement surface 1, a protective layer having the necessary strength and flatness as a base for a newly-installed tennis court can be obtained by performing only one series of operations up to the application of the fixing solution. May be obtained, but even if the flatness and support strength of the existing pavement surface 1 vary,
By performing the above-mentioned series of operations of spreading the aggregate layer, rolling and applying the fixation liquid at least twice, sufficient flatness and strength as a base for the newly established tennis court can be obtained. In this case, since the thin layer is applied twice, the problem due to insufficient permeation of the fixing liquid is further reduced.

When an asphalt emulsion is used as the fixing solution, the strength may be insufficient due to insufficient penetration depending on the temperature at the time of coating and other conditions. Further, even after the coating is cured, the asphalt emulsion may be softened by heat and the strength may be degraded.

To prevent this from occurring, it is advisable to use another second fixing liquid in combination. Since the surface strength of the aggregate layer is secured to some extent by the fixing liquid (asphalt emulsion) applied earlier, the second fixing liquid has good permeability,
In addition, it is preferable that the adhesive liquid easily reacts with the previously applied fixing liquid, for example, by ionic bonding, so that the liquid is immediately solidified even if it penetrates.

As a specific example, asphalt emulsion PK
For -3, cement milk obtained by adding 5 to 10 times by volume of water to ordinary Portland cement is preferable.
Since this cement milk has a low viscosity almost equal to that of water, it can be sprinkled with a jar or the like, or can be permeated into the aggregate layer by casting.

The strength of the diluted cement milk after curing is low, and if the thickness is increased, cracks may occur after curing. In this pavement surface rehabilitation method, cement milk is hardly thickened, but a small amount of EVA emulsion may be added to cement milk in order to prevent the crack from causing non-landing.

If the existing pavement surface 1 has good water permeability, and it is desired to take advantage of this performance, a water-permeable artificial turf is preferably employed, but the protective layer 2 can also be made water-permeable. . In this case, the asphalt emulsion is 0.5 to 2 l /
m ² and cement milk are in the range of 0.5 to ² l / m ² . Thereby, the drainage capacity of the entire athletic stadium can be increased.

Conversely, when the existing pavement surface 1 has poor water permeability and is likely to be softened by containing water, both the protective layer 2 and the artificial turf are preferably non-water-permeable. For this reason, the protective layer 2
The When a non-water permeability, for example 2.5 l / ^{m 2} asphalt emulsion amount, cement milk amount 1.5 l / ^{m 2}
By doing so, the protective layer 2 can be made impermeable.

The protective layer 2 may partially have water permeability due to the variation in the amount of the fixing liquid applied. However,
By making the artificial turf to be laminated non-permeable, it is possible to prevent water from entering the existing pavement surface from the portion having the permeability. That is, when using artificial turf having a water-impermeable specification, strictness is not required for the water-impermeable property of the protective layer 2.

By the above-described series of operations, the protective layer 2 made of the aggregate 21 bonded by the fixing liquid 22 can be formed. At an actual construction site, as shown in FIG. 8, a plurality of rails 3 are installed, and a protective layer 2 is formed for each lane L1, L2,. However, if an attempt is made to construct a protective layer in parallel with an adjacent lane, an operator may have to enter the adjacent protective layer installation surface, and the protective layer during installation may be damaged.

Therefore, first, for example, the odd lanes L1 and L
It is preferable to construct the protective layer 2 for the even lanes L2, L4,... According to this, even if the worker gets on the odd lane during the construction of the even lane, the protection layer of the odd lane is not damaged.

After the protective layer 2 has been constructed for all the lanes, the lane 3 is removed, and the same operation as that for forming the protective layer is repeated to fill the lane marks. That is, after the lane mark is filled with aggregate and rolled, a fixation liquid is applied. Repeat this series of operations as necessary.

It is to be noted that the protective layers 2 are provided on the odd lanes L1, L3,.
After the construction of each lane 3, the rails 3 are removed and the even lanes L2
A protective layer 2 can be formed on L4. This method will be described with reference to the cross-sectional view of FIG. That is, the even lane L
Speaking of 2, the protection layers 2 of the odd-numbered lanes L1 and L3 on both sides are used instead of the rails.

First, spacers 6, 6 are provided on the protective layers 2, 2 on both sides. The spacer 6 may be a simple strip, and its thickness is selected in consideration of the amount of sink when the aggregate 21 is spread and rolled. For example, if the aggregate layer sinks by about 5 mm due to the rolling pressure after spreading, the spacer 6
5 mm thick may be used. In addition, the fixed wood 4a used in this case may be a simple plate or bar having a flat lower edge.

Then, the aggregates 21 are spread on the even-numbered lanes L2, spread evenly by the fixed wood 4a, the spacers 6, 6 are removed, and the aggregates 21 are compacted by compacting means such as a Macadam roller. In this manner, the protective layer 2 can be formed without generating a step at the boundary of the lane.

Unlike the above embodiment, as shown in FIG. 11, the protection layer 2 can be formed without removing the rail 3 and keeping it on the existing pavement surface 1. That is, a concrete block is installed on the existing pavement surface 1 or concrete is cast into the rail 3a using a water thread stretched at a predetermined height as a guide.

In this case, the height of the rail 3a becomes the thickness of the protective layer 2 as it is. The cross-sectional shape of the rail 3a has a width of 10 in consideration of its installation property and workability of spreading the aggregate.
A depth of about 0 to 200 mm and a depth (length) of about 30 to 100 mm is preferable.

By providing the protective layer 2 between the rails 3a so as to be at the same height as the upper surface (top end), the rail 3a is used as a part of the protective layer 2 without removing it. be able to. The rail 3
In the case where a is so-called burying, the protective layer 2 is formed in the same manner as in the above embodiment.

The protective layer 2 according to the present invention has sufficient strength and flatness as a base on which artificial grass is laid. Therefore, as shown in FIG. 11, by laying the artificial turf 7 containing sand on the protective layer 2, the existing pavement surface (for example, a clay-based tennis court) 1 can maintain the flatness for a long period of time. Will be renovated.

Although the protective layer 2 according to the present invention has sufficient flatness by itself, when laying the artificial turf 7 requires more accurate flatness, the protective layer 2 may be used. 2, a flat layer may be further provided by a coating method. In this case, since most portions of the protective layer 2 have flatness, a flattening layer may be additionally formed only on a portion where flatness is particularly required.

[0065]

Next, an embodiment of the present invention in which a clay-based tennis court 5 years after construction is actually renovated and a comparative example thereof will be described.

Example 1 10.5 m × 16 m = 168
After the clay coat m ² (see FIG. 12) was pressurized sufficiently rolling tandem roller 2t, for applying the required slope as a tennis court on the clay court, crushed stone M-30
Was spread with a thickness of 100 to 0 mm and rolled to form a roadbed layer having a 1/200 gradient in the short direction (10.5 m direction) of the coat. Next, four square steel pipes of 50 × 50 mm square and 4 m in length were connected with a special jig to prepare four rails having a length of 16 m, and as shown in FIG. Was laid in parallel in the longitudinal direction of the clay coat (in the direction perpendicular to the gradient) at intervals of 3.5 m, and the clay coat was partitioned into three lanes L1 to L3. At this time, the height of both ends of each rail 3 and the connection part is checked at a level,
The height of the rail 3 was adjusted so that the top end of the rail 3 would be the planned height +35 mm by appropriately raising and biting. Here, referring to FIG. 13, the planned height is the position of the surface height of the aggregate layer spread on the clay coat. Next, 50x50
As shown in FIG. 13, an engaging step having a step of 35 mm was formed at both ends of a square steel pipe having a linearity of 3.6 mm in length and a square of 4 mm. And three lanes L1 to L
First, of lanes L1 and L3 on both the left and right sides,
After sprinkling No. 7 crushed stone as aggregate, a fixed wood scraping was performed to scrape off excess crushed stone to a thickness of 15 mm. The fixed tree 4 was gradually moved along the rail 3 while reciprocating in a direction perpendicular to the rail 3. In this way, the crushed stones were spread and spread with a regular wood chip, then rolled with a Macadam roller, and then sprayed with an asphalt emulsion PK-3 at 1.0 liter per square meter using an engine sprayer. Next, in order to correct the concave portion caused by the compaction, No. 7 crushed stone was again sprayed, and a fixed wood slip, compaction and emulsion spraying were performed. Finally, after mixing 1 liter of ordinary Portland cement with 5 liters of tap water and stirring the stirred cement milk with a ladle,
Spread with rubber rake. Since the particles of No. 7 crushed stone were slightly agitated by the rubber lake, it was rolled again by the vibrating plate. In this way, the protective layer was formed on the lanes L1 and L3, and after culturing overnight, the rail 3 was removed.
Then, a number of iron plates having a thickness of 3 mm, a length of 2 m, and a width of 5 cm were provided along the ends of the protection layers of the lanes L1 and L3 on the lane L2 side. Using this as a rail, the remaining lane L
For No. 2, a protective layer was applied in the same manner as described above (see FIG. 9). The fixed tree at this time is 50 × 50 mm square and 3.
A 6-meter square steel pipe was used without forming an engaging step at the end. After training overnight, the protective layer in lane L2 was completed. On the third day, the water thread is stretched along the protective layer at a pitch of 2 m in the gradient direction (the short direction of the coat), and the portion where the water thread is stretched is measured at 2 m intervals as the level of the protective layer as uneven, The asphalt emulsion based non-roughness modifier (Sumitomo Rubber Industries, Ltd., trade name S
L910A) was modified with mortar appropriately mixed with sand having a particle size of 0.1 to 0.6 mm, and then artificial turf containing sand was laid and constructed to complete a tennis court. The artificial turf used was a polypropylene, split yarn having a thickness of 8400 decitex and approximately 1 kg per square meter and planted on a polypropylene base cloth, and the pile length was 1 mm.
9 mm. The planted pile is lined with a latex backing from the back. After the artificial turf was laid on the entire surface of the protective layer, the grass was filled with 25 to 26 kg of dry silica sand having a particle size of 0.2 to 0.8 mm per square meter to obtain an artificial turf containing sand. The total number of construction days was 3 days (2 days for forming the protective layer, 1 day for uneven land correction and artificial turf laying).
Day). The terrain correction area was about 25 m ² , which was about 15% of the total. When they actually played on this newly-installed court surface and observed the situation three months after the construction, both the flatness and strength were good. Further, when water was sprayed to test the presence or absence of a puddle, there was no puddle as it was at the beginning of construction.

<Comparative Example 1> 10.5mx16m = 168
After the clay court of m ² was pressurized sufficiently rolling in tandem rollers 2t, in order to give the required slope as a tennis court on the clay court, 100~0m the crushed stone M-30
m with a thickness of 1 m
A roadbed layer having a slope of 200 was provided (up to this step, the same as in Example 1 above). Next, asphalt emulsion PK-3
Was spread with an engine sprayer at 1.0 liter per square meter, and then crushed stone No. 7 as an aggregate was spread evenly. Then, the emulsion was sprayed and crushed stone No. 7 was spread and leveled while visually confirming the concave portions to form a protective layer. Next, non-flat was measured along the protective layer in the same manner as in the first embodiment, and non-flat was corrected in the range of 5 mm or more in the same manner as in the first embodiment. After forming a flat layer on the protective layer by a coating method, finally, an artificial grass containing sand having the same specification as that of Example 1 was laid. The total construction time required 5 days (2 days for formation of protective layer, 2 days for uneven land correction and formation of flat layer, 1 day for laying artificial turf). The terrain correction area was about 160 m ^2, which was about 95% of the total.
The situation of three months after the construction was actually played on this newly established court surface, as in Example 1 above, was good in both flatness and strength. Did not.

<Comparative Example 2> In the above Example 1, an artificial turf containing sand was laid on the protective layer. In Comparative Example 2, an artificial turf without sand was laid on the protective layer. The method of applying the protective layer is the same as in the first embodiment. The artificial turf used was an artificial turf in which a monofilament yarn made of nylon 66 and having a thickness of 660 decitex was approximately 1 kg per square meter and planted on a polypropylene base cloth, and the pile length was 8 mm. The planted pile is lined with a latex backing from the back. The total construction days were 3 days as in Example 1 (2 days for formation of the protective layer, 1 day for non-landing correction and laying of artificial turf). Uneven surface correction range is about 29m in total ² to about 17%
Met. The situation of three months after the construction was actually performed on the newly-installed court surface was good in both flatness and strength, but in the watering test, water pools occurred in two places.

<Comparative Example 3> 10.5mx16m = 168
clay coat m ^2, after forming the protective layer in the same manner as in Example 1, to complete the tennis court and spread with a thickness of 1.5mm acrylic resin as the surface coating layer.
The total construction time required four days (two days for forming the protective layer, one day for correcting the uneven ground, and one day for the surface coat layer). The irregularity correction range is
About 32 m ² was about 19% of the whole. Three months after the construction, when the players actually played on the newly-created court surface, both the flatness and strength were good, but there were many places where the protective layer had collapsed due to falling off of No. 7 crushed stone.

For reference, the above Example 1 and Comparative Example 1
Table 1 shows the comparisons of Nos. 1 to 3. The construction period is the same as in the first embodiment.
And Comparative Example 2 were the shortest in 3 days, but Comparative Example 2 was an artificial turf without sand, so that the tread thickness was not dispersed and the protective layer was locally dented, and water accumulation occurred in that portion.

The above Example 1 and Comparative Example 1 were not
Although there is no inferiority in the situation of months, in the total number of construction days, the example 1 is 3 days, whereas the comparative example 1 is 3 days.
There is a significant difference in that it takes five days. In Comparative Example 3, since the surface coat layer is a coating method, the tread thickness is less dispersed than in Comparative Example 2, and the protective layer is severely damaged. Therefore, it can be concluded that the combination of the protective layer constructed according to the present invention and the artificial turf containing sand is optimal.

[0072]

[Table 1]

[0073]

According to the present invention, the following effects can be obtained. Since the renovation thickness is small, it fits well with existing surrounding equipment. Since the existing pavement is not excavated or removed, the construction period is short and economical. Because the aggregate is spread evenly, the flatness is extremely high. Due to the uniform thickness of the aggregate, the fixation liquid penetrates uniformly. By using a relatively viscous fixing liquid and a relatively permeable fixing liquid having good reactivity with the fixing liquid together, the fixing strength of the aggregate becomes uniform. When laying artificial grass on the protective layer, a flat layer is basically unnecessary. Even if a flat layer is required, it can be done in a very limited range.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a pavement surface repair method according to the present invention.

FIG. 2 is a sectional view of the embodiment.

FIG. 3 is a schematic view for explaining a construction process of the embodiment.

FIG. 4 is a schematic diagram for explaining a construction process of the embodiment.

FIG. 5 is a schematic diagram for explaining a construction process of the embodiment.

FIG. 6 is a schematic diagram for explaining a construction process of the embodiment.

FIG. 7 is a schematic view for explaining a construction process of the embodiment.

FIG. 8 is a perspective view for explaining a construction example at an actual construction site.

FIG. 9 is a cross-sectional view for explaining another construction example at an actual construction site.

FIG. 10 is a sectional view for explaining another embodiment of the present invention.

FIG. 11 is a sectional view showing an artificial turf sports stadium modified according to the present invention.

FIG. 12 is a schematic perspective view for explaining a specific first embodiment of the present invention.

FIG. 13 is a schematic perspective view of a principal part for describing a specific first embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Existing pavement surface 11 Crushed stone layer 2 Protective layer 21 Crushed stone 22 Fixed liquid 3, 3a rail 31 Rail member 4, 4a Fixed wood 41 Flat surface 42 Engaging stepped part 5 Rolling means (Macadam roller) 6 Spacer 7 Artificial turf L lane

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yoshihiko Baba 3-6-9, Wakihama-cho, Chuo-ku, Kobe-shi, Hyogo Sumitomo Rubber Industries, Ltd. F-term (reference) 2D051 AA00 AB02 AB04 AC00 AF01 AF02 AG01 AG11 AH01 DB02 DC05 EA01 EA06 EB06 HA10 2D053 AA13 AA15 AA20 AA21 AD01 AD03

Claims (7)

[Claims] 1. A pavement surface repairing method for repairing an existing pavement surface to a flat surface having a uniform predetermined strength, wherein a plurality of rails are distributed on the existing pavement surface in substantially the same plane. After installing in parallel as the height, the aggregate scattered between two adjacent rails is laid flat with a fixed wood laid between the rails, and then rolled into a stable aggregate layer by rolling. A method of repairing a pavement surface, comprising applying a fixation liquid to the aggregate layer to form a protective layer on the existing pavement surface. 2. The method according to claim 1, wherein a first fixing liquid having a relatively high viscosity and a second fixing liquid having a relatively high permeability are used as the fixing liquid, and the first fixing liquid is applied to the aggregate layer. The pavement surface repair method according to claim 1, wherein a second fixing liquid is applied. 3. The method for repairing a pavement surface according to claim 1, wherein the existing pavement surface is preliminarily flattened before forming the protective layer. 4. The pavement surface renovation according to claim 1, wherein a flat layer for obtaining high flatness is further formed on the protective layer by a coating method. Method. 5. The artificial turf pavement surface according to claim 1, wherein an artificial turf is laid on the protective layer directly or via a flat layer, and the existing pavement surface is modified into an artificial turf pavement surface. Pavement surface repair method described in. 6. A method according to claim 1, further comprising the step of: using an existing pavement surface as a base, and laying flat on the base, and providing a protective layer formed by applying a fixation liquid to the rolled aggregate layer. Athletic stadium. 7. The athletic stadium according to claim 6, wherein an artificial turf containing sand is laid on the protective layer directly or via a flat layer.