JP3764240B2 - Pedestrian system pavement structure - Google Patents

Pedestrian system pavement structure Download PDF

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Publication number
JP3764240B2
JP3764240B2 JP03395197A JP3395197A JP3764240B2 JP 3764240 B2 JP3764240 B2 JP 3764240B2 JP 03395197 A JP03395197 A JP 03395197A JP 3395197 A JP3395197 A JP 3395197A JP 3764240 B2 JP3764240 B2 JP 3764240B2
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JP
Japan
Prior art keywords
surface layer
soil
pavement structure
base layer
water
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP03395197A
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Japanese (ja)
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JPH10227005A (en
Inventor
明宏 梶谷
康夫 小川
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Road Co Ltd
Original Assignee
Nippon Road Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Road Co Ltd filed Critical Nippon Road Co Ltd
Priority to JP03395197A priority Critical patent/JP3764240B2/en
Publication of JPH10227005A publication Critical patent/JPH10227005A/en
Application granted granted Critical
Publication of JP3764240B2 publication Critical patent/JP3764240B2/en
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Description

【0001】
【発明の属する技術分野】
この発明は、表層を自然に近い土系舗装とした歩行者系舗装構造に関する。
【0002】
【従来の技術】
従来、例えば、自然道、遊歩道、ジョギングコース等において、表層を自然に近い土系舗装とした舗装構造のものが知られている。
【0003】
土系舗装構造の概要は、土に一定量の樹脂材を混合し、敷設したものである。これにより、土とほぼ同じ感触が味わえる外に、雨水によるぬかるみや、ほこりがたたない等のメリットが得られるようになっている。
【0004】
【発明が解決しようとする課題】
土系舗装構造の主な目的は、自然に近い状態が得られるようにするものであるが、加えて前記した効果が期待できるようにしたものである。反面、土系舗装のために、表層部分に霜柱が発生し易く、融解によって軟化するため、霜柱が発生する地域での適用には問題が残る。また、乾湿の影響を受け易く、特に、水分を含むと軟化し易い。また、軟弱な地盤では、所定の強度、耐久性が得られにくく、管理用の作業車が入れない等の問題があった。
【0005】
そこで、この発明は、前記問題の解消を図った歩行者系舗装構造を提供すること目的としている。
【0006】
【課題を解決するための手段】
前記目的を達成するために、この発明は、上から順に表層、基層、路盤、路床とから成ると共に、前記表層を、土と樹脂材と混合し、樹脂材に対する土の混合割合いを多くした透水性の土系表層とする一方、基層を、毛管水の上昇を阻止し、透水性を備えた合成粒度の粗い骨材を用いたアスファルト混合物で形成する。
【0007】
かかる舗装構造によれば、表層は、土系表層となるため、自然に近い土の感触が得られる。また、埃がたつこともない。一方、雨の日は表層、基層を雨水が通過するため、円滑に透水する。この結果、ぬかるみや水たまりは起きない。
また、基層は、透水性を備えた粗い層となるため、毛管水の上昇は起こらず、地下からの水の上昇を遮断し、土系表層の霜柱の発生を防ぐ。
また、表層は、アスファルト混合物によって形成された基層によって支持された構造となるため、管理用の作業車が通過しても支障のない強度と耐久性が確保される。
【0008】
【発明の実施の形態】
以下、図1と図2の図面を参照しながらこの発明の実施の形態を説明する。
図1は、この発明にかかる舗装構造を示している。舗装構造は、上から順に表層1、基層3、路盤5、路床7とから成る構造となっており、例えば、自然道を始めとして、遊歩道、公園、ジョギングコース、ゲートボール場、広場等に実施可能となっている
表層1は、土と樹脂材とで構成され、樹脂材に対して土の混合割合が多い透水性を備えた土系表層となっている。
表層1の好ましい例として、例えば主材料となる土は、真砂土、山砂を用いる。使用土の粒度としては、図2に示す如く、例えばフルイ目1.36mmの時、通過重量百分率で85.6%のものを使用する。社内規格の範囲としては25〜100%ものでも可能である。
【0009】
あるいは、フルイ目75μmの時、通過重量百分率で10.9%のものを使用する。社内規格の範囲としては5〜25%のものでも可能である。
また、塑性指数はNPのものを用いることが望ましい。
【0010】
一方、樹脂材としては、ウレタン樹脂系のものを使用し、土と樹脂材の混合割合を、土の乾燥重量に対し、樹脂材を2〜10%(重量比)としてある。また、表層1の厚さとしては、2〜4cmの範囲に設定することが望ましい。
【0011】
基層3は、表層1を支持すると共に、細い隙間によって地下からの水が上昇する毛管水の上昇を阻止し、透水性を備えた合成粒度の粗い骨材を用いたアスファルト混合物で形成されている。
【0012】
基層3の好ましい混合割合としては、例えば、砕石は80〜85%、砂は10〜5%、フィラーは3〜5%、アスファルトは3〜6%(重量比)としたものを用いる。
また、基層3の厚さとしては、3〜5cmの範囲に設定することが望ましい。
【0013】
路盤5は、路床7の上に砕石などの粒状材料を所定の厚さに敷並べた形成となっている。この場合、アスファルト又はセメントを加えて安定処理した材料を用いることも可能である。
かかる歩行者系舗装構造によれば、表層1は、自然に近い土の感触が得られると共に、埃がたつこともない。また、雨水は、表層1、基層3を通過するため、水がたまることなく円滑に透水し、ぬかるみになることもない。
【0014】
また、基層3は透水性を備えた粗い層となるため、毛管水の上昇は起こらず、地下からの水の上昇を遮断し、表層1の霜柱の発生を防ぐ。しかも、表層1は、アスファルト混合物によって形成された基層3で支持されるため、管理用の作業車が通過しても、支障のない強度と耐久性が得られるようになる。
【0015】
【発明の効果】
以上、説明したよう、この発明の歩行者系舗装構造によれば、次のような効果を奏する。
【0016】
(1) 自然に近い土の感触が得られるとともに、ぬかるみになったり、埃がたつのを防ぐことができる。
(2) 雨水は、表層、基層を通過するため、表面に水がたまることがなくなる。 (3) 透水性を備えた粗い層の基層によって、地下から水が上昇する毛管水を阻止できるため、土系の表層にあっても、霜柱の発生は起こらず、霜柱が起きる地域での実施が可能となる。
(4) 表層は、アスファルト混合物によって形成された基層で支持されるため、管理用の作業車が通過しても支障のない強度と耐久性が得られる。
【図面の簡単な説明】
【図1】この発明にかかる歩行者系舗装構造の説明図。
【図2】表層に使用される土の事例を示した説明図。
【符号の説明】
1 表層
3 基層
5 路盤
7 路床
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pedestrian pavement structure in which the surface layer is a soil pavement close to nature.
[0002]
[Prior art]
Conventionally, for example, in a natural road, a promenade, a jogging course, and the like, a pavement structure in which the surface layer is a soil-based pavement close to nature is known.
[0003]
The outline of the earth-based pavement structure is that a certain amount of resin material is mixed and laid in the soil. As a result, in addition to being able to taste almost the same feeling as the soil, it is possible to obtain merits such as the muddyness of rainwater and the absence of dust.
[0004]
[Problems to be solved by the invention]
The main purpose of the earth-based pavement structure is to make it possible to obtain a state close to nature. In addition, the above-described effects can be expected. On the other hand, frost columns tend to be generated on the surface layer due to earth-based pavement, and soften by melting, so that problems remain in application in areas where frost columns are generated. Moreover, it is easy to be influenced by dry and wet, especially when it contains moisture. In addition, in a soft ground, it is difficult to obtain predetermined strength and durability, and there is a problem that a management work vehicle cannot be put in.
[0005]
Then, this invention aims at providing the pedestrian system pavement structure which aimed at elimination of the said problem.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the present invention comprises a surface layer, a base layer, a roadbed, and a roadbed in order from the top, and the surface layer is mixed with soil and a resin material, and the mixing ratio of soil to the resin material is increased. On the other hand, the base layer is formed of an asphalt mixture using a coarse aggregate with a synthetic particle size that prevents capillary water from rising and has water permeability.
[0007]
According to such a pavement structure, since the surface layer becomes a soil-based surface layer, a feel of soil close to nature can be obtained. Moreover, there is no dust. On the other hand, since rainwater passes through the surface layer and base layer on rainy days, water can pass through smoothly. As a result, no stuffiness or puddle occurs.
In addition, since the base layer is a rough layer having water permeability, the capillary water does not rise, blocks the rise of water from the underground, and prevents the generation of frost columns on the earth surface.
In addition, since the surface layer has a structure supported by a base layer formed of an asphalt mixture, strength and durability that do not hinder the passage of a management work vehicle are ensured.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 2.
FIG. 1 shows a pavement structure according to the present invention. The pavement structure is composed of surface layer 1, base layer 3, roadbed 5 and roadbed 7 in order from the top. For example, natural roads, promenades, parks, jogging courses, gateball fields, open spaces, etc. The possible surface layer 1 is composed of soil and a resin material, and is a soil-based surface layer having water permeability with a large mixing ratio of soil to the resin material.
As a preferable example of the surface layer 1, for example, pure sand or mountain sand is used as the main material. As the particle size of the soil used, as shown in FIG. 2, for example, when the sieve mesh is 1.36 mm, the passing weight percentage is 85.6%. The range of in-house standards can be 25 to 100%.
[0009]
Alternatively, when the sieve mesh is 75 μm, a weight percentage of 10.9% is used. An in-house standard range of 5 to 25% is also possible.
Further, it is desirable to use a plastic index of NP.
[0010]
On the other hand, as the resin material, a urethane resin-based material is used, and the mixing ratio of the soil and the resin material is 2 to 10% (weight ratio) with respect to the dry weight of the soil. Moreover, as thickness of the surface layer 1, it is desirable to set to the range of 2-4 cm.
[0011]
The base layer 3 supports the surface layer 1 and prevents an increase in capillary water in which water from the underground rises due to a narrow gap, and is formed of an asphalt mixture using a coarse aggregate having water permeability. .
[0012]
As a preferable mixing ratio of the base layer 3, for example, crushed stone is 80 to 85%, sand is 10 to 5%, filler is 3 to 5%, and asphalt is 3 to 6% (weight ratio).
Moreover, as thickness of the base layer 3, it is desirable to set to the range of 3-5 cm.
[0013]
The roadbed 5 is formed by placing granular materials such as crushed stones on the roadbed 7 in a predetermined thickness. In this case, it is also possible to use a material that has been stabilized by adding asphalt or cement.
According to such a pedestrian pavement structure, the surface layer 1 has a natural feel of soil and is free from dust. Moreover, since rainwater passes the surface layer 1 and the base layer 3, it permeates smoothly without accumulating water and does not become muddy.
[0014]
Moreover, since the base layer 3 becomes a rough layer with water permeability, the capillary water does not rise, blocks the rise of water from the underground, and prevents the generation of frost columns on the surface layer 1. Moreover, since the surface layer 1 is supported by the base layer 3 formed of an asphalt mixture, even if a management work vehicle passes, strength and durability without any trouble can be obtained.
[0015]
【The invention's effect】
As described above, according to the pedestrian system pavement structure of the present invention, the following effects can be obtained.
[0016]
(1) The feel of earth close to nature can be obtained, and it can prevent mud and dust.
(2) Since rainwater passes through the surface layer and base layer, water does not collect on the surface. (3) Capillary water that rises from underground can be prevented by a rough base layer with water permeability, so frost columns do not occur even in the soil surface layer, and it is implemented in areas where frost columns occur. Is possible.
(4) Since the surface layer is supported by a base layer formed of an asphalt mixture, it is possible to obtain strength and durability that does not hinder even if a management work vehicle passes.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a pedestrian paving structure according to the present invention.
FIG. 2 is an explanatory diagram showing an example of soil used for the surface layer.
[Explanation of symbols]
1 surface layer 3 base layer 5 roadbed 7 roadbed

Claims (1)

上から順に表層,基層,路盤、路床とから成ると共に、前記表層を、土と樹脂材とを混合し、樹脂材に対する土の混合割合いを多くした透水性の土系表層とする一方、基層を、毛管水の上昇を阻止し、透水性を備えた合成粒度の粗い骨材を用いたアスファルト混合物で形成することを特徴とする歩行者系舗装構造。While consisting of a surface layer, a base layer, a roadbed, and a roadbed in order from the top, the surface layer is a water-permeable soil-based surface layer in which soil and resin material are mixed, and the mixing ratio of soil to resin material is increased, A pedestrian pavement structure characterized in that the base layer is formed of an asphalt mixture using a coarse aggregate having a water permeability and preventing capillary water from rising.
JP03395197A 1997-02-18 1997-02-18 Pedestrian system pavement structure Expired - Fee Related JP3764240B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP03395197A JP3764240B2 (en) 1997-02-18 1997-02-18 Pedestrian system pavement structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP03395197A JP3764240B2 (en) 1997-02-18 1997-02-18 Pedestrian system pavement structure

Publications (2)

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JPH10227005A JPH10227005A (en) 1998-08-25
JP3764240B2 true JP3764240B2 (en) 2006-04-05

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Country Status (1)

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030095463A (en) * 2002-06-10 2003-12-24 김복일 Method for bonding F.R.P bridge deck with ascon
JP5276892B2 (en) * 2008-05-07 2013-08-28 日本道路株式会社 Gravel gravel pavement structure
CN114753204B (en) * 2022-03-25 2024-01-19 中国建筑设计研究院有限公司 Sand road with ecological function

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