JP5869328B2 - Road protection zone formation construction method and structure - Google Patents

Road protection zone formation construction method and structure Download PDF

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JP5869328B2
JP5869328B2 JP2011268140A JP2011268140A JP5869328B2 JP 5869328 B2 JP5869328 B2 JP 5869328B2 JP 2011268140 A JP2011268140 A JP 2011268140A JP 2011268140 A JP2011268140 A JP 2011268140A JP 5869328 B2 JP5869328 B2 JP 5869328B2
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徹 津守
徹 津守
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本発明は、道路の損傷を防止する保護帯(法面を含む場合もある)の形成工事方法及びその構造に関する。なお、ここで保護帯には、雑草の繁茂を防止する領域(広場、河川敷、中央分離帯、植樹帯)も含む。 The present invention relates to a method for forming a protective band (which may include a slope) for preventing road damage and a structure thereof. Here, the protection zone includes a region (open space, riverbed, central separation zone, tree planting zone) that prevents weeds from growing.

従来、道路(車道、歩道)の損傷を防止するために道路路肩に設けられる保護帯は、路面と異なりアスファルト等による舗装がなされていないため、雑草が繁茂する季節には草刈作業が必要になるという問題がある。このため、道路路肩の表層部の土砂を取り除き、そのあとに生コンクリートを打設し養生してコンクリート層を設けることが行われている。しかし、コンクリート層を設けるためには、生コンクリート打設用の型枠を設置する作業、打設した生コンクリート表面の均し作業、養生期間(約2昼夜)の確保、型枠を解体除去する作業等が必要になるため、工事工程が煩雑になると共に工事期間が長くなるという問題がある。
そこで、道路路肩の表層部の土砂を取り除き、取り除いた土砂の一部に固化材としてセメントを混合した混合土を、道路路肩に残存する土砂の上に配置して混合土に散水した後、水分を含有した混合土を転圧し、その表面を均して固化することにより混合土固化層からなる保護帯を形成することが行われている(例えば、特許文献1参照)。
Conventionally, the protective belt provided on the shoulder of the road to prevent damage to the road (roadway, sidewalk) has not been paved with asphalt etc. unlike the road surface, so mowing work is necessary in the season when weeds are thriving There is a problem. For this reason, it has been practiced to remove the earth and sand from the surface layer portion of the road shoulder, and then cast concrete and harden it to provide a concrete layer. However, in order to provide a concrete layer, the work for installing a formwork for placing ready-mixed concrete, the work of leveling the placed ready-mixed concrete surface, securing the curing period (about 2 days and nights), and dismantling and removing the formwork Since work is required, the construction process becomes complicated and the construction period becomes long.
Therefore, the soil on the surface of the road shoulder is removed, and the mixed soil obtained by mixing cement as a solidified material with a part of the removed soil is placed on the soil remaining on the road shoulder and sprinkled on the mixed soil. A protective zone made of a mixed soil solidified layer is formed by rolling the mixed soil containing slag and leveling and solidifying the surface thereof (see, for example, Patent Document 1).

特許第3207128号公報Japanese Patent No. 3207128

しかしながら、特許文献1に記載された保護層では、混合土にセメントが含まれているため、固化する際に混合土固化層に収縮が生じ、路面の舗装帯と混合土固化層との間に隙間が形成され、この隙間に雑草の種子が入り込むため、舗装帯と混合土固化層の間に雑草が繁茂するという問題が生じる。また、混合土固化層内には雨水が滲入できるので、冬期において混合土固化層内に含まれる水の凍結及び融解が繰り返されると、混合土固化層が風化して崩壊するという問題が生じる。 However, in the protective layer described in Patent Document 1, since cement is contained in the mixed soil, the mixed soil solidified layer shrinks when solidified, and the road surface is between the pavement zone and the mixed soil solidified layer. Since a gap is formed and weed seeds enter the gap, there arises a problem that the weed grows between the pavement and the mixed soil solidified layer. In addition, since rainwater can infiltrate into the mixed soil solidified layer, there is a problem that when the freezing and thawing of water contained in the mixed soil solidified layer is repeated in winter, the mixed soil solidified layer is weathered and collapses.

本発明はかかる事情に鑑みてなされたもので、舗装帯との密着性に優れ、雨水の滲入を防止することが可能な道路の保護帯の形成工事方法及びその構造を提供することを目的とする。 The present invention was made in view of such circumstances, and an object of the present invention is to provide a method for forming a protective zone for a road and its structure, which has excellent adhesion to a pavement and can prevent infiltration of rainwater. To do.

前記目的に沿う第1の発明に係る道路の保護帯の形成工事方法は、コンクリート又はアスファルトの舗装帯に連接して形成される保護帯の形成工事方法であって、
前記保護帯が形成される領域の表層部の土砂を取り除く土砂除去工程と、
前記領域に残存する土砂の上に、土砂、火山灰、及び岩石を破砕した細粒物のいずれか1又は2以上とセメントとの混合土を配置して散水する水分付与工程と、
水分を含有した前記混合土を転圧し、該混合土の表面高さ位置を前記舗装帯の表面高さ位置より低く均して固化させ混合土固化層を形成する混合土固化工程と、
前記混合土固化層の上に、硬化後に弾力性を有する水溶性アクリル樹脂を水に分散させた樹脂分散液を砂に加えて練って作製した樹脂混合砂モルタルを敷き詰め、該樹脂混合砂モルタルの表面を均して固化させ樹脂混合砂固化層を形成する樹脂混合砂固化工程とを有する。
なお、ここで使用する水溶性アクリル樹脂は、乾燥して硬化した後は、耐水性(水に対する不溶性)を発現する特性を有する(以下、同様)。
The road protection band forming construction method according to the first invention in accordance with the above object is a protective band forming construction method formed by connecting to a concrete or asphalt pavement band ,
Sediment removal step of removing the soil in the surface layer portion of the region where the protective band is formed,
Moisturizing step of sprinkling water by placing mixed soil of any one or more of fine particles obtained by crushing earth and sand, volcanic ash, and rocks and cement on the earth and sand remaining in the region;
A mixed soil solidifying step of rolling the mixed soil containing moisture, and forming a mixed soil solidified layer by solidifying the surface height position of the mixed soil lower than the surface height position of the pavement;
A resin mixed sand mortar prepared by adding a resin dispersion in which a water- soluble acrylic resin having elasticity after being dispersed in water is added to sand and kneading is spread on the mixed soil solidified layer. And a resin mixed sand solidifying step of forming a resin mixed sand solidified layer by leveling and solidifying the surface.
In addition, the water-soluble acrylic resin used here has a characteristic of developing water resistance (insoluble in water) after drying and curing (hereinafter the same).

前記目的に沿う第の発明に係る道路の保護帯の構造は、コンクリート又はアスファルトの舗装帯に連接して形成される保護帯の構造であって、
前記保護帯を形成する領域の表層部の土砂を取り除いたあとの残存土砂の上に、土砂、火山灰、及び岩石を破砕した細粒物のいずれか1又は2以上とセメントとの混合土からなる混合土固化層を設け、該混合土固化層の上に、硬化後に弾力性を有する水溶性アクリル樹脂と砂からなる樹脂混合砂固化層を設け、
前記混合土固化層は、前記残存土砂の上に配された前記混合土に散水し、転圧して該混合土の表面高さ位置を前記舗装帯の表面高さ位置より低く均して固化した層であって、前記樹脂混合砂固化層は、前記水溶性アクリル樹脂を水に分散させた樹脂分散液を砂に加えて練って作製した樹脂混合砂モルタルを前記混合土固化層の上に敷き詰め、該樹脂混合砂モルタルの表面を均して固化した層である。
The structure of the road protection band according to the second invention that meets the above-mentioned object is a structure of a protection band formed in connection with a concrete or asphalt pavement band ,
Over the remaining sediment after removing the sediment surface layer portion in the region for forming the protective band, a mixed soil of sediment, volcanic ash, and either 1 or 2 or more and cement fines crushing rock A mixed soil solidified layer is provided, and a resin mixed sand solidified layer made of water-soluble acrylic resin and sand having elasticity after curing is provided on the mixed soil solidified layer,
The mixed soil solidified layer is sprinkled with water on the mixed soil disposed on the remaining soil and rolled to reduce the surface height position of the mixed soil to be lower than the surface height position of the pavement and solidified. The resin mixed sand solidified layer is a resin mixed sand mortar prepared by adding a resin dispersion obtained by dispersing the water- soluble acrylic resin in water and kneading the mixture onto the mixed soil solidified layer. And a layer obtained by leveling and solidifying the surface of the resin mixed sand mortar.

第1の発明に係る道路の保護帯の形成工事方法及び第の発明に係る道路の保護帯の構造においては、舗装帯に連接して混合土固化層を設け、混合土固化層の上に樹脂混合砂モルタルを敷き詰め、その表面を均すので、樹脂混合砂モルタルは舗装帯の側端部に密着すると共に、樹脂混合砂モルタルの一部は舗装帯の側端部に存在する凹凸内に進入する。このため、樹脂混合砂モルタルから形成される樹脂混合砂固化層の一部は、舗装帯の側端部に存在する凹凸内に食い込んだ状態となる。その結果、樹脂混合砂固化層を舗装帯の側端部に固着できる。また、樹脂混合砂モルタルが固化(乾燥)して樹脂混合砂固化層が形成される際に、樹脂混合砂固化層内には水溶性樹脂が乾燥し硬化することにより形成される樹脂連続部が生成し、砂は生成した樹脂連続部内に取り込まれた状態となる。そして、水溶性樹脂は硬化後に弾力性を有するので、生成する樹脂連続部も弾力性を有する。その結果、樹脂混合砂固化層内に生成した弾力性を有する樹脂連続部により、樹脂混合砂固化層にも弾力性が賦与される。 In the construction method of the road protection zone according to the first invention and the structure of the road protection zone according to the second invention, a mixed soil solidified layer is provided connected to the pavement belt, and the mixed soil solidified layer is provided on the mixed soil solidified layer. Since the resin mixed sand mortar is spread and leveled, the resin mixed sand mortar is in close contact with the side edge of the pavement, and part of the resin mixed sand mortar is within the unevenness present on the side edge of the pavement. enter in. For this reason, a part of the resin-mixed sand solidified layer formed from the resin-mixed sand mortar is in a state of being bitten into the unevenness present at the side end of the pavement. As a result, the resin mixed sand solidified layer can be fixed to the side end portion of the pavement. In addition, when the resin mixed sand mortar is solidified (dried) to form a resin mixed sand solidified layer, a resin continuous portion formed by drying and curing the water-soluble resin is formed in the resin mixed sand solidified layer. The sand is generated and is taken into the generated resin continuous part. And since water-soluble resin has elasticity after hardening, the resin continuous part to produce | generate also has elasticity. As a result, elasticity is imparted to the resin mixed sand solidified layer by the elastic resin continuous portion generated in the resin mixed sand solidified layer.

このため、樹脂混合砂モルタルから樹脂混合砂固化層が形成される際に収縮が生じても、樹脂混合砂固化層は舗装帯の側端部に固着した状態で変形する(伸びる)ことができ、樹脂混合砂固化層が舗装帯の側端部から剥がれて、樹脂混合砂固化層と舗装帯の側端部との間に隙間が形成されることを防止できる。その結果、雑草の種子が、樹脂混合砂固化層と舗装帯との間に侵入することはなく、舗装帯と混合土固化層(保護帯)の間に雑草が繁茂することを防止できる。
そして、樹脂混合砂固化層は、樹脂連続部と樹脂連続部内に取り込まれた砂から構成され、水溶性樹脂が乾燥し硬化して形成される樹脂連続部は耐水性(水に対する不溶性)を有しているので、雨水が樹脂混合砂固化層内に滲入することを防止できる。このため、混合土固化層内に雨水が滲入することもない。その結果、冬期に雨水の凍結及び融解が繰り返されることによる樹脂混合砂固化層及び混合土固化層の風化を防止でき、保護帯の補修作業の削減、保護帯のメンテナンス負担の低減が可能になる。
For this reason, even if shrinkage occurs when the resin-mixed sand solidified layer is formed from the resin-mixed sand mortar, the resin-mixed sand solidified layer can be deformed (elongated) while being fixed to the side edge of the pavement. It is possible to prevent the resin-mixed sand-solidified layer from being peeled off from the side end portion of the pavement belt and a gap being formed between the resin-mixed sand-solidified layer and the side end portion of the pavement strip. As a result, weed seeds do not enter between the resin-mixed sand-solidified layer and the pavement zone, and weeds can be prevented from growing between the pavement zone and the mixed soil-solidified layer (protective zone).
The resin-mixed sand solidified layer is composed of a resin continuous part and sand taken into the resin continuous part, and the resin continuous part formed by drying and curing the water-soluble resin has water resistance (insoluble in water). Therefore, it is possible to prevent rainwater from infiltrating into the resin mixed sand solidified layer. For this reason, rainwater does not permeate into the mixed soil solidified layer. As a result, weathering of the resin-mixed sand solidified layer and the mixed soil solidified layer due to repeated freezing and thawing of rainwater in winter can be prevented, and it becomes possible to reduce the repair work of the protective zone and the maintenance burden of the protective zone. .

第1の発明に係る道路の保護帯の形成工事方法において、水溶性樹脂が水溶性アクリル樹脂であるので、樹脂混合砂固化層の耐候性を向上させることができ、樹脂混合砂固化層(保護帯)の寿命を長くすることができる。 In forming construction method of the protective band of a road according to the first invention, since the water-soluble resin is a water-soluble acrylic resin, it is possible to improve the weather resistance of the resin mixture sand solidified layer, the resin mixture sand solidified layer (protective The life of the belt can be extended.

本発明の第1の実施の形態に係る道路の保護帯の構造を示す断面図である。It is sectional drawing which shows the structure of the protective zone of the road which concerns on the 1st Embodiment of this invention. (A)〜(D)は、それぞれ本発明の第1の実施の形態に係る道路の保護帯の形成工事方法の土砂除去工程、水分付与工程、混合土固化工程、及び樹脂混合砂固化工程の説明図である。(A)-(D) are respectively the earth and sand removal process of the road protection belt formation construction method which concerns on the 1st Embodiment of this invention, a moisture provision process, a mixed soil solidification process, and a resin mixed sand solidification process. It is explanatory drawing. 本発明の第2の実施の形態に係る道路の保護帯の構造を示す断面図である。It is sectional drawing which shows the structure of the protective zone of the road which concerns on the 2nd Embodiment of this invention. (A)〜(D)は、それぞれ本発明の第2の実施の形態に係る道路の保護帯の形成工事方法の固化材散布工程、撹拌工程、混合土固化工程、及び樹脂混合砂固化工程の説明図である。(A) to (D) are respectively a solidifying material spraying step, a stirring step, a mixed soil solidifying step, and a resin mixed sand solidifying step of the road protection band forming construction method according to the second embodiment of the present invention. It is explanatory drawing.

続いて、添付した図面を参照しつつ、本発明を具体化した実施の形態につき説明し、本発明の理解に供する。
図1に示すように、本発明の第1の実施の形態に係る道路の保護帯の形成工事方法によって形成される保護帯10は、例えば、アスファルトの舗装帯11の損傷を防止するために、舗装帯11の外側に舗装帯11に連接して形成されている。そして、保護帯10の構造は、保護帯10を形成する工事領域(道路路肩)12の表層部の土砂を取り除いたあとの残存土砂の頂部13の上に、取り除いた土砂の一部と固化材の一例であるセメントとの混合土からなる混合土固化層14を設け、混合土固化層14の上に、硬化後に弾力性を有する水溶性樹脂の一例である水溶性アクリル樹脂と砂からなる樹脂混合砂固化層15を設けた構成となっている。
Next, embodiments of the present invention will be described with reference to the accompanying drawings for understanding of the present invention.
As shown in FIG. 1, the protective band 10 formed by the road protective band forming construction method according to the first embodiment of the present invention is, for example, to prevent damage to the asphalt pavement band 11. It is formed outside the pavement band 11 so as to be connected to the pavement band 11. And the structure of the protection belt | band | zone 10 is a part of the removed earth and sand, and solidification material on the top part 13 of the residual earth and sand after removing the earth and sand of the surface layer part of the construction area | region (road shoulder) 12 which forms the protection belt 10 A mixed soil-solidified layer 14 made of a mixed soil with cement, which is an example of the above, is provided, and a resin made of water-soluble acrylic resin and sand, which is an example of a water-soluble resin having elasticity after curing, on the mixed soil-solidified layer 14 The mixed sand solidified layer 15 is provided.

ここで、混合土固化層14は、残存土砂の頂部13の上に配された混合土に散水し、水分を含んだ混合土を転圧して、混合土の表面高さ位置を舗装帯11の表面高さ位置より、例えば1.5〜5mm低くなるように均して固化した層である。
そして、混合土に取り除いた土砂の一部を使用するため、混合土固化層14は、残存土砂の頂部13との馴染みがよく、残存土砂の頂部13と容易に一体化する。また、混合土の一部にセメントを使用し、混合土に散水してから転圧するので、混合土固化層14の充填率が向上して強度が向上すると共に、寸法変化を小さくすることができる。このため、混合土固化層14を形成することで、舗装帯11の損傷を防止することができる。なお、混合土に、道路路肩の表層部から除去した土砂の一部を使用するので、保護帯10の形成工事に伴って発生する廃棄物の量を削減することができる。
Here, the mixed soil solidified layer 14 sprinkles water on the mixed soil disposed on the top portion 13 of the remaining earth and sand, and rolls the mixed soil containing moisture to set the surface height position of the mixed soil to the pavement 11. For example, the layer is solidified so as to be 1.5 to 5 mm lower than the surface height position.
Since a part of the earth and sand removed in the mixed soil is used, the mixed soil solidified layer 14 is well-familiar with the top 13 of the residual earth and sand and is easily integrated with the top 13 of the residual earth and sand. Moreover, since cement is used for a part of the mixed soil, and the water is sprinkled after being sprinkled on the mixed soil, the filling rate of the mixed soil solidified layer 14 is improved, the strength is improved, and the dimensional change can be reduced. . For this reason, damage to the pavement 11 can be prevented by forming the mixed soil solidified layer 14. In addition, since a part of earth and sand removed from the surface layer part of the road shoulder is used for mixed soil, the quantity of the waste generated with the construction work of the protection zone 10 can be reduced.

また、樹脂混合砂固化層15は、水溶性アクリル樹脂を水に分散させた樹脂分散液を砂に加えて練って作製した樹脂混合砂モルタルを混合土固化層14の上に敷き詰め、樹脂混合砂モルタルの表面を均して(例えば、樹脂混合砂モルタルの表面高さ位置を、舗装帯11の表面高さ位置に一致させて)固化した層である。樹脂混合砂固化層15に水溶性アクリル樹脂(水溶性樹脂の一例)を使用しているため、樹脂混合砂固化層15の耐候性を向上させることができる。 The resin-mixed sand solidified layer 15 is a resin-mixed sand mortar prepared by adding a resin dispersion obtained by dispersing a water-soluble acrylic resin in water to the sand and kneading the mixture on the mixed soil-solidified layer 14. This is a layer obtained by leveling the surface of the mortar (for example, by matching the surface height position of the resin-mixed sand mortar with the surface height position of the pavement 11). Since a water-soluble acrylic resin (an example of a water-soluble resin) is used for the resin mixed sand solidified layer 15, the weather resistance of the resin mixed sand solidified layer 15 can be improved.

樹脂混合砂モルタルを混合土固化層14の上に敷き詰めて、その表面を均すことにより、樹脂混合砂モルタルは、舗装帯11の側端部に密着すると共に、樹脂混合砂モルタルの一部は舗装帯11の側端部に存在する凹凸(図示せず)の中に進入する。このため、樹脂混合砂モルタルから形成される樹脂混合砂固化層15の一部は、舗装帯11の側端部に存在する凹凸内に食い込んだ状態となる。その結果、樹脂混合砂固化層15を舗装帯11の側端部に固着できる。また、樹脂混合砂モルタルが固化(乾燥)して樹脂混合砂固化層15が形成される際に、樹脂混合砂固化層15内には水溶性アクリル樹脂が乾燥し硬化して形成される樹脂連続部(図示せず)が生成し、砂は生成した樹脂連続部内に取り込まれた状態となる。そして、水溶性アクリル樹脂は硬化後に弾力性を有するので、生成する樹脂連続部も弾力性を有する。その結果、樹脂混合砂固化層15内に生成した弾力性を有する樹脂連続部により、樹脂混合砂固化層15にも弾力性が賦与される。 By spreading the resin mixed sand mortar on the mixed soil solidified layer 14 and leveling the surface, the resin mixed sand mortar adheres to the side edge of the pavement 11 and a part of the resin mixed sand mortar is It enters into the unevenness (not shown) existing at the side edge of the pavement 11. For this reason, a part of the resin-mixed sand solidified layer 15 formed from the resin-mixed sand mortar is in a state of being bitten into the unevenness existing at the side end of the pavement 11. As a result, the resin mixed sand solidified layer 15 can be fixed to the side end of the pavement 11. In addition, when the resin mixed sand mortar is solidified (dried) to form the resin mixed sand solidified layer 15, the resin continuous sand resin solidified layer 15 is formed by drying and curing the water-soluble acrylic resin. Part (not shown) is generated, and the sand is taken into the generated resin continuous part. And since water-soluble acrylic resin has elasticity after hardening, the resin continuous part to produce | generate also has elasticity. As a result, elasticity is imparted to the resin mixed sand solidified layer 15 by the elastic continuous resin portion generated in the resin mixed sand solidified layer 15.

このため、樹脂混合砂モルタルから樹脂混合砂固化層15が形成される際に生じる収縮に伴って、樹脂混合砂固化層15を舗装帯11の側端部に固着させた状態で変形させることができ、樹脂混合砂固化層15が舗装帯11の側端部から剥がれて、樹脂混合砂固化層15と舗装帯11の側端部との間に隙間が形成されることを防止できる。その結果、雑草の種子が、樹脂混合砂固化層15と舗装帯11との間に侵入することはなく、舗装帯11と混合土固化層14(保護帯10)の間に雑草が繁茂することを防止できる。
そして、樹脂混合砂固化層15は、樹脂連続部と樹脂連続部内に取り込まれた砂から構成され、水溶性アクリル樹脂の硬化により形成される樹脂連続部は耐水性を有しているので、雨水が樹脂混合砂固化層15内に滲入することを防止できる。このため、混合土固化層14内に雨水が滲入することもない。その結果、冬期に雨水の凍結及び融解が繰り返されることによる樹脂混合砂固化層15及び混合土固化層14の風化を防止でき、保護帯10の補修作業の削減、保護帯のメンテナンス負担の低減が可能になる。
For this reason, the resin mixed sand solidified layer 15 can be deformed in a state of being fixed to the side end portion of the pavement 11 in accordance with the shrinkage that occurs when the resin mixed sand solidified layer 15 is formed from the resin mixed sand mortar. In addition, it is possible to prevent the resin mixed sand solidified layer 15 from being peeled off from the side end portion of the pavement belt 11 and forming a gap between the resin mixed sand solidified layer 15 and the side end portion of the pavement belt 11. As a result, weed seeds do not invade between the resin-mixed sand-solidified layer 15 and the pavement zone 11, and the weeds grow between the pavement zone 11 and the mixed soil-solidified layer 14 (protective zone 10). Can be prevented.
The resin mixed sand solidified layer 15 is composed of a resin continuous part and sand taken into the resin continuous part, and the resin continuous part formed by curing the water-soluble acrylic resin has water resistance. Can be prevented from penetrating into the resin mixed sand solidified layer 15. For this reason, rainwater does not permeate into the mixed soil solidified layer 14. As a result, weathering of the resin mixed sand solidified layer 15 and the mixed soil solidified layer 14 due to repeated freezing and thawing of rainwater in winter can be prevented, and the repair work of the protective belt 10 can be reduced, and the maintenance burden of the protective belt can be reduced. It becomes possible.

続いて、本発明の第1の実施の形態に係る道路の保護帯の形成工事方法について説明する。
図2(A)〜(D)に示すように、アスファルトの舗装帯11の外側に舗装帯11に連接して形成される保護帯10の形成工事方法は、保護帯10を形成する工事領域12の表層部の土砂を取り除く土砂除去工程と、工事領域12に残存する土砂の頂部13の上に、除去した土砂の一部とセメントとの混合土16を配置して散水する水分付与工程と、水分を含有した混合土16を転圧し、混合土16の表面高さ位置を舗装帯11の表面高さ位置より低く均して固化させ混合土固化層14を形成する混合土固化工程と、混合土固化層14の上に、硬化後に弾力性を有する水溶性アクリル樹脂を水に分散させた樹脂分散液を砂に加えて練って作製した樹脂混合砂モルタルを敷き詰め、樹脂混合砂モルタルの表面を均して固化させ樹脂混合砂固化層15を形成する樹脂混合砂固化工程とを有している。以下、詳細に説明する。
Subsequently, a method for forming a protective band for a road according to the first embodiment of the present invention will be described.
As shown in FIGS. 2 (A) to 2 (D), the method of forming the protective band 10 formed on the outside of the asphalt pavement band 11 so as to be connected to the pavement band 11 includes a work area 12 for forming the protective band 10. A soil removal step for removing the soil in the surface layer portion, and a moisture application step for sprinkling water by placing a mixed soil 16 of a part of the removed soil and cement on the top portion 13 of the soil remaining in the construction area 12; A mixed soil solidification step in which the mixed soil 16 containing moisture is rolled, the surface height position of the mixed soil 16 is leveled lower than the surface height position of the pavement 11 and solidified to form the mixed soil solidified layer 14; A resin mixed sand mortar prepared by adding a resin dispersion in which water-soluble acrylic resin having elasticity after being dispersed in water is added to the sand and kneaded is spread on the soil solidified layer 14, and the surface of the resin mixed sand mortar is coated. Solidified and solidified resin mixed sand solidified layer 5 and a resin mixing sand solidifying step of forming. Details will be described below.

(土砂除去工程)
舗装帯11を形成する際に、保護帯10を形成する工事領域12の表面は、舗装帯11の表面(路面)と、例えば、同一高さとなるように整面されている。このため、工事領域12を深さD(5〜12cm、例えば10cm)掘り返し、工事領域12の表層部の土砂を取り除く。ここで、取り除いた土砂の一部は、後工程で使用する混合土16に使用する。
(Sediment removal process)
When forming the pavement 11, the surface of the construction area 12 that forms the protection band 10 is leveled with the surface (road surface) of the pavement 11, for example. For this reason, the construction area 12 is dug to a depth D (5 to 12 cm, for example, 10 cm), and the earth and sand in the surface layer portion of the construction area 12 is removed. Here, a part of the removed earth and sand is used for the mixed soil 16 used in the subsequent process.

(水分付与工程)
取り除いた土砂の一部とセメントを混合して混合土16を作製する。ここで、混合するセメント量は、土砂1mに対して、100〜300kg、例えば200kgである。
次いで、工事領域12に残存する土砂の頂部13の上に、混合土16を一様の厚みで配置し、散水する。ここで、散水量は、配設した混合土16の表面まで水が浮いてくる状態とする。
(Moisture application process)
A mixed soil 16 is prepared by mixing a part of the removed earth and sand with cement. Here, the amount of cement to be mixed is 100 to 300 kg, for example 200 kg, with respect to 1 m 3 of earth and sand.
Next, the mixed soil 16 is arranged with a uniform thickness on the top 13 of the earth and sand remaining in the construction area 12 and watered. Here, the amount of water spray is such that water floats to the surface of the mixed soil 16 disposed.

(混合土固化工程)
水分を含有させた混合土16の表面を、例えば、油圧ショベル等で押圧することで転圧し、混合土16の表面が舗装帯11の表面より高さH(1.5〜5mm、例えば3mm)低くなるように均し、1昼夜程度養生し固化させる。形成された混合土固化層14は、工事領域12に残存する土砂の頂部13と一体化する。これによって、舗装帯11の側端部が混合土固化層14により、保護される。
(Mixed soil solidification process)
The surface of the mixed soil 16 containing moisture is pressed by, for example, a hydraulic excavator or the like, and the surface of the mixed soil 16 is higher than the surface of the pavement 11 by a height H (1.5 to 5 mm, for example, 3 mm). It is leveled so that it is low, and is cured and solidified for about one day. The formed mixed soil solidified layer 14 is integrated with the top 13 of the earth and sand remaining in the construction area 12. Thereby, the side edge part of the pavement 11 is protected by the mixed soil solidified layer 14.

(樹脂混合砂固化工程)
砂に水溶性アクリル樹脂が水中に分散した樹脂分散液を加え、混練して樹脂混合砂モルタルを作製する。ここで、砂に混合する水溶性アクリル樹脂の量は、固形分換算で、砂100kgに対して、2〜10kg、好ましくは2.5〜6kg、例えば3kgである。なお、樹脂混合砂モルタルを作製する際に加える水分量は、混合土固化層14の上に樹脂混合砂モルタルを敷き詰める際の作業性に応じて調整する。
次いで、樹脂混合砂モルタルを形成された混合土固化層14の上に敷き詰め、樹脂混合砂モルタルの表面高さ位置が、例えば、舗装帯11の表面高さ位置と一致するように均し、1昼夜程度養生し固化させる。
樹脂混合砂モルタルを混合土固化層14上に敷き詰め、均した際に、樹脂混合砂モルタルの一部は、混合土固化層14の表層部に存在する凹凸部内及び舗装帯11の側端部に存在する凹凸部内にそれぞれ進入するので、樹脂混合砂モルタルから形成される樹脂混合砂固化層15の一部は、混合土固化層14の表層部及び舗装帯11の側端部にそれぞれ存在する凹凸内に食い込んだ状態となる。これによって、形成された樹脂混合砂固化層15は、混合土固化層14の表層部及び舗装帯11の側端部に固着する。
(Resin mixed sand solidification process)
A resin dispersion in which a water-soluble acrylic resin is dispersed in water is added to sand and kneaded to prepare a resin mixed sand mortar. Here, the amount of the water-soluble acrylic resin mixed with the sand is 2 to 10 kg, preferably 2.5 to 6 kg, for example, 3 kg with respect to 100 kg of sand in terms of solid content. The amount of water added when preparing the resin mixed sand mortar is adjusted according to the workability when the resin mixed sand mortar is spread on the mixed soil solidified layer 14.
Next, the resin mixed sand mortar is spread on the mixed soil solidified layer 14 formed, and the surface height position of the resin mixed sand mortar is leveled so as to coincide with the surface height position of the pavement 11, for example. Cured and solidified about day and night.
When the resin-mixed sand mortar is spread on the mixed soil-solidified layer 14 and leveled, a part of the resin-mixed sand mortar is present in the uneven portions present on the surface layer portion of the mixed soil-solidified layer 14 and on the side edges of the pavement 11. Since it enters into the existing uneven portions, a part of the resin-mixed sand solidified layer 15 formed from the resin-mixed sand mortar is uneven in the surface layer portion of the mixed soil-solidified layer 14 and the side edge portions of the pavement 11 respectively. It will be in a state that has digged inside. Thus, the formed resin mixed sand solidified layer 15 is fixed to the surface layer portion of the mixed soil solidified layer 14 and the side end portion of the pavement 11.

図3に示すように、本発明の第2の実施の形態に係る道路の保護帯の形成工事方法によって形成される保護帯17は、例えば、アスファルトの舗装帯18の損傷を防止するために、舗装帯18の外側に舗装帯18に連接して形成されている。そして、保護帯17の構造は、保護帯17を形成する工事領域(道路路肩)19の表層部の土砂の上に散布した固化材の一例であるセメントと工事領域19の表層部の土砂との混合土からなる混合土固化層20を工事領域19に設け、混合土固化層20の上に、硬化後に弾力性を有する水溶性樹脂の一例である水溶性アクリル樹脂と砂からなる樹脂混合砂固化層21を設けた構成となっている。 As shown in FIG. 3, the protective band 17 formed by the road protective band forming construction method according to the second embodiment of the present invention is, for example, to prevent damage to the asphalt pavement band 18. It is formed outside the pavement band 18 so as to be connected to the pavement band 18. The structure of the protective band 17 includes cement that is an example of a solidified material spread on the soil in the surface layer of the construction area (road shoulder) 19 that forms the protective band 17 and the earth and sand in the surface layer of the construction area 19. A mixed soil-solidified layer 20 made of mixed soil is provided in the construction area 19, and a resin-mixed sand-solidified material made of water-soluble acrylic resin and sand, which is an example of a water-soluble resin having elasticity after curing, is formed on the mixed soil-solidified layer 20. The layer 21 is provided.

ここで、混合土固化層20は、混合土に不足する水分(セメントの硬化に必要な水分量と混合土(表層部の土砂)の含有する水分量との差に相当する量の水分)を加え、水分を含んだ混合土を転圧して、混合土の表面高さ位置を舗装帯18の表面高さ位置より、例えば1.5〜5mm低くなるように均して固化した層である。
そして、混合土を工事領域19の表層部の土砂とセメントから形成するため、混合土固化層20は、工事領域19の表層部下方にある路肩中間層22との馴染みがよく、路肩中間層22と容易に一体化する。また、混合土の一部にセメントを使用し、混合土に、水分を加えて転圧するので、混合土固化層20の充填率が向上して強度が向上すると共に、セメント硬化時の寸法変化を小さくすることができる。このため、混合土固化層20を形成することで、舗装帯18の損傷を防止することができる。なお、混合土に、工事領域19の表層部の土砂を使用するので、保護帯17の形成工事に伴って廃棄物は発生しない。
Here, the mixed soil solidified layer 20 has insufficient moisture (the amount of water corresponding to the difference between the amount of water necessary for hardening the cement and the amount of water contained in the mixed soil (soil of the surface layer)). In addition, it is a layer obtained by rolling and pressing the mixed soil containing moisture so that the surface height position of the mixed soil is 1.5 to 5 mm lower than the surface height position of the pavement band 18, for example.
And since mixed soil is formed from the earth and sand and cement of the surface layer part of the construction area 19, the mixed soil solidified layer 20 is familiar with the road shoulder intermediate layer 22 below the surface layer part of the construction area 19, and the road shoulder intermediate layer 22 And easy integration. Moreover, since cement is used for a part of the mixed soil and moisture is added to the mixed soil and rolled, the filling rate of the mixed soil solidified layer 20 is improved and the strength is improved, and the dimensional change at the time of cement hardening is also improved. Can be small. For this reason, damage to the pavement 18 can be prevented by forming the mixed soil solidified layer 20. In addition, since the earth and sand of the surface layer part of the construction area | region 19 is used for mixed soil, a waste material does not generate | occur | produce with the construction work of the protection zone 17. FIG.

また、樹脂混合砂固化層21は、水溶性アクリル樹脂を水に分散させた樹脂分散液を砂に加えて練って作製した樹脂混合砂モルタルを混合土固化層20の上に敷き詰め、樹脂混合砂モルタルの表面を均して(例えば、樹脂混合砂モルタルの表面高さ位置を、舗装帯18の表面高さ位置に一致させて)固化した層である。樹脂混合砂固化層21に水溶性アクリル樹脂(水溶性樹脂の一例)を使用しているため、樹脂混合砂固化層21の耐候性を向上させることができる。 The resin mixed sand solidified layer 21 is laid on the mixed soil solidified layer 20 with a resin mixed sand mortar prepared by adding a resin dispersion obtained by dispersing a water-soluble acrylic resin in water to the sand and kneading the resin mixed sand solid layer 20. This is a layer obtained by leveling the surface of the mortar (for example, by matching the surface height position of the resin-mixed sand mortar with the surface height position of the pavement 18). Since a water-soluble acrylic resin (an example of a water-soluble resin) is used for the resin mixed sand solidified layer 21, the weather resistance of the resin mixed sand solidified layer 21 can be improved.

樹脂混合砂モルタルを混合土固化層20の上に敷き詰めて、その表面を均すことにより、樹脂混合砂モルタルは、舗装帯18の側端部に密着すると共に、樹脂混合砂モルタルの一部は舗装帯18の側端部に存在する凹凸(図示せず)の中に進入する。このため、樹脂混合砂モルタルから形成される樹脂混合砂固化層21の一部は、舗装帯18の側端部に存在する凹凸内に食い込んだ状態となる。その結果、樹脂混合砂固化層21を舗装帯18の側端部に固着できる。また、樹脂混合砂モルタルが固化(乾燥)して樹脂混合砂固化層21が形成される際に、樹脂混合砂固化層21内には乾燥した水溶性樹脂からなる樹脂連続部(図示せず)が生成し、砂は生成した樹脂連続部内に取り込まれた状態となる。そして、水溶性アクリル樹脂は硬化後に弾力性を有するので、生成する樹脂連続部も弾力性を有する。その結果、樹脂混合砂固化層21内に生成した弾力性を有する樹脂連続部により、樹脂混合砂固化層21にも弾力性が賦与される。 By spreading the resin mixed sand mortar on the mixed soil solidified layer 20 and leveling the surface, the resin mixed sand mortar adheres to the side edge of the pavement 18 and a part of the resin mixed sand mortar is It enters into the unevenness (not shown) existing at the side edge of the pavement 18. For this reason, a part of the resin-mixed sand solidified layer 21 formed from the resin-mixed sand mortar is in a state of being bitten into the unevenness existing at the side end of the pavement 18. As a result, the resin mixed sand solidified layer 21 can be fixed to the side end portion of the pavement belt 18. Further, when the resin mixed sand mortar is solidified (dried) to form the resin mixed sand solidified layer 21, a resin continuous portion (not shown) made of a dried water-soluble resin is formed in the resin mixed sand solidified layer 21. Is generated, and the sand is taken into the generated resin continuous part. And since water-soluble acrylic resin has elasticity after hardening, the resin continuous part to produce | generate also has elasticity. As a result, elasticity is imparted to the resin mixed sand solidified layer 21 by the elastic continuous resin portion generated in the resin mixed sand solidified layer 21.

このため、樹脂混合砂モルタルから樹脂混合砂固化層21が形成される際に生じる収縮に伴って、樹脂混合砂固化層21を舗装帯18の側端部に固着させた状態で変形させることができ、樹脂混合砂固化層21が舗装帯18の側端部から剥がれて、樹脂混合砂固化層21と舗装帯18の側端部との間に隙間が形成されることを防止できる。その結果、雑草の種子が、樹脂混合砂固化層21と舗装帯18との間に侵入することはなく、舗装帯18と混合土固化層20(保護帯17)の間に雑草が繁茂することを防止できる。
そして、樹脂混合砂固化層21は、樹脂連続部と樹脂連続部内に取り込まれた砂から構成され、水溶性アクリル樹脂が硬化して形成される樹脂連続部は耐水性を有しているので、雨水が樹脂混合砂固化層21内に滲入することを防止できる。このため、混合土固化層20内に雨水が滲入することもない。その結果、冬期に雨水の凍結及び融解が繰り返されることによる樹脂混合砂固化層21及び混合土固化層20の風化を防止でき、保護帯17の補修作業の削減、保護帯のメンテナンス負担の低減が可能になる。
For this reason, the resin mixed sand solidified layer 21 may be deformed in a state of being fixed to the side end portion of the pavement 18 in accordance with the shrinkage that occurs when the resin mixed sand solidified layer 21 is formed from the resin mixed sand mortar. It is possible to prevent the resin-mixed sand-solidified layer 21 from being peeled off from the side end portion of the pavement band 18 and forming a gap between the resin-mixed sand-solidified layer 21 and the side end portion of the pavement band 18. As a result, weed seeds do not invade between the resin-mixed sand-solidified layer 21 and the pavement zone 18, and the weeds grow between the pavement zone 18 and the mixed soil-solidified layer 20 (protective zone 17). Can be prevented.
And the resin mixed sand solidified layer 21 is composed of a resin continuous part and sand taken into the resin continuous part, and since the resin continuous part formed by curing the water-soluble acrylic resin has water resistance, Rainwater can be prevented from infiltrating into the resin mixed sand solidified layer 21. For this reason, rainwater does not enter the mixed soil solidified layer 20. As a result, weathering of the resin mixed sand solidified layer 21 and the mixed soil solidified layer 20 due to repeated freezing and thawing of rainwater in winter can be prevented, and the repair work of the protective belt 17 can be reduced, and the maintenance burden on the protective belt can be reduced. It becomes possible.

続いて、本発明の第2の実施の形態に係る道路の保護帯の形成工事方法について説明する。
図4(A)〜(D)に示すように、アスファルトの舗装帯18の外側に舗装帯18に連接して形成される保護帯17の形成工事方法は、保護帯17が形成される工事領域19にセメント23(固化材の一例)を散布する固化材散布工程と、セメント23が散布された工事領域19の表層部の土砂とセメント23との混合土24に、不足する水分を加えて(散水して)混合する撹拌工程と、水分を含有した混合土24を転圧し、混合土24の表面高さ位置を舗装帯18の表面高さ位置より低く均して固化させ混合土固化層20を形成する混合土固化工程と、混合土固化層20の上に、硬化後に弾力性を有する水溶性アクリル樹脂を水に分散させた樹脂分散液を砂に加えて練って作製した樹脂混合砂モルタルを敷き詰め、樹脂混合砂モルタルの表面を均して固化させ樹脂混合砂固化層21を形成する樹脂混合砂固化工程とを有している。以下、詳細に説明する。
Subsequently, a method for forming a protective band for a road according to a second embodiment of the present invention will be described.
As shown in FIGS. 4 (A) to 4 (D), the method for forming the protective band 17 formed on the outside of the asphalt pavement band 18 and connected to the pavement band 18 is a work area where the protective band 17 is formed. Insufficient moisture is added to the mixed soil 24 of the solidified material and the cement 23 in the surface layer portion of the construction area 19 where the cement 23 is dispersed, and the solidified material spraying step of spraying the cement 23 (an example of the solidified material) to 19 (see FIG. The mixed soil solidified layer 20 is formed by rolling the mixed soil 24 containing moisture and rolling the mixed soil 24 containing water and leveling the surface height position of the mixed soil 24 lower than the surface height position of the pavement 18. A mixed soil solidifying step of forming a resin, and a resin mixed sand mortar prepared by adding a resin dispersion in which water-soluble acrylic resin having elasticity after curing is added to water and kneaded onto the mixed soil solidified layer 20 Spread the resin mixed sand mortar table Solidifying smoothed out and a resin mixture sand solidifying to form a resin mixture sand solidified layer 21. Details will be described below.

(固化材散布工程)
舗装帯18を形成する際に、保護帯17を形成する工事領域19の表面は、舗装帯18の表面(路面)と、例えば、同一高さとなるように整面されている。このため、工事領域19の整面された部位に、セメント23を一様に散布する。ここで、散布するセメント23の量は、土砂1mに対して、100〜300kg、例えば200kgである。
(Solidifying material spraying process)
When the pavement band 18 is formed, the surface of the construction area 19 where the protective band 17 is formed is leveled so as to be, for example, the same height as the surface (road surface) of the pavement band 18. For this reason, the cement 23 is uniformly sprayed on the leveled portion of the construction area 19. Here, the amount of the cement 23 to be spread is 100 to 300 kg, for example, 200 kg with respect to 1 m 3 of earth and sand.

(撹拌工程)
セメント23が散布された工事領域19の表層部の土砂を、深さ5〜12cm、例えば10cm掘り返しながらセメントと土砂とを撹拌し、土砂とセメント23との混合土24を形成する。そして、混合土24の表面を均した後、混合土24に水分を加える。なお、水分は、均した混合土24の表面高さ位置まで水が浮いてくるまで加える。
(Stirring process)
Cement and earth and sand are agitated while digging back 5 to 12 cm, for example, 10 cm, of the earth and sand in the construction area 19 to which the cement 23 has been spread to form a mixed earth 24 of earth and sand 23. Then, after leveling the surface of the mixed soil 24, moisture is added to the mixed soil 24. The water is added until the water floats up to the level of the surface of the uniform mixed soil 24.

(混合土固化工程)
水分を含有させた混合土24の表面を、例えば、油圧ショベル等で押圧することで転圧し、混合土24の表面が舗装帯18の表面より高さS(1.5〜5mm、例えば3mm)低くなるように均し、1昼夜程度養生し固化させる。形成された混合土固化層20は、工事領域19の表層部下方にある路肩中間層22と一体化する。これによって、舗装帯18の側端部が混合土固化層20により、保護される。
(Mixed soil solidification process)
The surface of the mixed soil 24 containing water is pressed by, for example, a hydraulic excavator or the like, and the surface of the mixed soil 24 is higher than the surface of the pavement 18 by a height S (1.5 to 5 mm, for example, 3 mm). It is leveled so that it is low, and is cured and solidified for about one day. The formed mixed soil solidified layer 20 is integrated with the road shoulder intermediate layer 22 below the surface layer portion of the construction area 19. As a result, the side edges of the pavement 18 are protected by the mixed soil solidified layer 20.

(樹脂混合砂固化工程)
砂に水溶性アクリル樹脂が水中に分散した樹脂分散液を加え、混練して樹脂混合砂モルタルを作製する。ここで、砂に混合する水溶性アクリル樹脂の量は、固形分換算で、砂100kgに対して、2〜10kg、好ましくは2.5〜6kg、例えば3kgである。なお、樹脂混合砂モルタルを作製する際に加える水分量は、混合土固化層20の上に樹脂混合砂モルタルを敷き詰める際の作業性に応じて調整する。
次いで、樹脂混合砂モルタルを形成された混合土固化層20の上に敷き詰め、樹脂混合砂モルタルの表面高さ位置が、例えば、舗装帯18の表面高さ位置と一致するように均し、1昼夜程度養生し固化させる。
樹脂混合砂モルタルを混合土固化層20上に敷き詰め、均した際に、樹脂混合砂モルタルの一部は、混合土固化層20の表層部に存在する凹凸部内及び舗装帯18の側端部に存在する凹凸部内にそれぞれ進入するので、樹脂混合砂モルタルから形成される樹脂混合砂固化層21の一部は、混合土固化層20の表層部及び舗装帯18の側端部にそれぞれ存在する凹凸内に食い込んだ状態となる。これによって、形成された樹脂混合砂固化層21は、混合土固化層20の表層部及び舗装帯18の側端部に固着する。
(Resin mixed sand solidification process)
A resin dispersion in which a water-soluble acrylic resin is dispersed in water is added to sand and kneaded to prepare a resin mixed sand mortar. Here, the amount of the water-soluble acrylic resin mixed with the sand is 2 to 10 kg, preferably 2.5 to 6 kg, for example, 3 kg with respect to 100 kg of sand in terms of solid content. The amount of water added when preparing the resin mixed sand mortar is adjusted according to workability when the resin mixed sand mortar is spread on the mixed soil solidified layer 20.
Next, the resin mixed sand mortar is spread on the mixed soil solidified layer 20, and the surface height position of the resin mixed sand mortar is leveled so as to coincide with the surface height position of the pavement band 18, for example. Cured and solidified about day and night.
When the resin-mixed sand mortar is spread on the mixed soil-solidified layer 20 and leveled, a part of the resin-mixed sand mortar is in the uneven portions present on the surface layer portion of the mixed soil-solidified layer 20 and on the side edges of the pavement 18. Each of the resin mixed sand solidified layers 21 formed from the resin mixed sand mortar is partly formed on the surface layer portion of the mixed soil solidified layer 20 and the side edge portions of the pavement 18 because it enters into the existing uneven portions. It will be in a state that has digged inside. Thereby, the formed resin mixed sand solidified layer 21 is fixed to the surface layer portion of the mixed soil solidified layer 20 and the side end portion of the pavement band 18.

以上のように、本発明の第2の実施の形態に係る道路の保護帯の形成工事方法では、保護帯17を形成する工事領域19にセメント23を散布し、その場(工事領域19)でセメント23と工事領域19の表層部の土砂との混合土24を形成すると共に、混合土24に水分を加えて転圧して混合土固化層20を形成するので、第1の実施の形態に係る道路の保護帯の形成工事方法と比較して、混合土固化層20の形成に伴う付帯作業(取り除いた表層部の土砂の工事領域19からの搬出、別の場所で作製した混合土24の工事領域19への搬入等)を大幅に削減することができる。その結果、保護帯17の形成を効率的に行うことができる。 As described above, in the road protection band forming construction method according to the second embodiment of the present invention, the cement 23 is sprayed on the construction area 19 that forms the protection band 17, and on the spot (the construction area 19). According to the first embodiment, the mixed soil 24 of the cement 23 and the earth and sand of the surface layer portion of the construction area 19 is formed, and the mixed soil 24 is pressed by adding moisture to the mixed soil 24 to form the mixed soil solidified layer 20. Compared with the road protection zone formation construction method, incidental work accompanying the formation of the mixed soil solidified layer 20 (the removal of the removed surface soil from the construction area 19, construction of the mixed soil 24 prepared at another location) The carrying-in to the area | region 19 etc.) can be reduced significantly. As a result, the protective band 17 can be formed efficiently.

以上、本発明を、実施の形態を参照して説明してきたが、本発明は何ら上記した実施の形態に記載した構成に限定されるものではなく、特許請求の範囲に記載されている事項の範囲内で考えられるその他の実施の形態や変形例も含むものである。
更に、本実施の形態とその他の実施の形態や変形例にそれぞれ含まれる構成要素を組合わせたものも、本発明に含まれる。
例えば、保護帯を道路路肩に形成する場合について説明したが、道路路肩以外の部位(道路路肩及び道路路肩に連続する道路の法面)についても適用することができる。更に、道路の法面のみに対しても適用することができる。
また、保護帯をアスファルトの舗装帯の外側に形成する場合について説明したが、コンクリートの舗装帯の外側に形成する場合についても適用することができる。
混合土の作製に、保護帯が形成される工事領域の表層部を掘り起こして除去した土砂を使用したが、掘り起こして除去した土砂の代わりに、他の土砂、火山灰、及び岩石を破砕した細粒物のいずれか1又は2以上を使用することもできる。また、樹脂混合砂モルタルを作製する際に、砂の代わりに、掘り起こして除去した土砂を篩い分けして得た細粒を使用してもよい。更に、樹脂混合砂モルタルの表面を、舗装帯の表面と同一高さ位置に均して固化したが、樹脂混合砂モルタルの表面を舗装帯の表面より下方に位置するようにしてもよい。
なお、本発明は、舗装帯に連接して形成される保護帯の形成工事方法及びその構造に関するものであるが、道路以外の場所に対して、本発明の保護帯の形成工事方法を適用して保護帯を形成すると、雑草の生育を防止することができ、除草作業負担を削減することができる。
As described above, the present invention has been described with reference to the embodiment. However, the present invention is not limited to the configuration described in the above-described embodiment, and the matters described in the scope of claims. Other embodiments and modifications conceivable within the scope are also included.
Further, the present invention also includes a combination of components included in the present embodiment and other embodiments and modifications.
For example, although the case where the protective band is formed on the road shoulder has been described, the present invention can also be applied to parts other than the road shoulder (the road shoulder and the road slope continuous with the road shoulder). Furthermore, the present invention can be applied only to road slopes.
Moreover, although the case where the protective band is formed outside the asphalt pavement has been described, the present invention can also be applied to the case where it is formed outside the concrete pavement.
For the preparation of the mixed soil, the earth and sand removed by digging up and removing the surface layer of the construction area where the protective zone is formed was used, but instead of the earth and sand removed by digging up, other fine sand and volcanic ash and rocks were crushed Any one or more of the objects can also be used. Moreover, when producing resin mixed sand mortar, instead of sand, fine particles obtained by sieving earth and sand removed by digging and removing may be used. Furthermore, although the surface of the resin mixed sand mortar is leveled and solidified at the same height as the surface of the pavement, the surface of the resin mixed sand mortar may be positioned below the surface of the pavement.
The present invention relates to a method for forming a protective band formed by connecting to a pavement band and its structure. However, the method for forming a protective band of the present invention is applied to a place other than a road. By forming a protective zone, weed growth can be prevented and the burden of weeding work can be reduced.

10:保護帯、11:舗装帯、12:工事領域、13:頂部、14:混合土固化層、15:樹脂混合砂固化層、16:混合土、17:保護帯、18:舗装帯、19:工事領域、20:混合土固化層、21:樹脂混合砂固化層、22:路肩中間層、23:セメント、24:混合土 10: protective zone, 11: pavement zone, 12: construction area, 13: top, 14: mixed soil solidified layer, 15: resin mixed sand solidified layer, 16: mixed soil, 17: protective zone, 18: pavement zone, 19 : Construction area, 20: Mixed soil solidified layer, 21: Resin mixed sand solidified layer, 22: Road shoulder intermediate layer, 23: Cement, 24: Mixed soil

Claims (2)

コンクリート又はアスファルトの舗装帯に連接して形成される保護帯の形成工事方法であって、
前記保護帯が形成される領域の表層部の土砂を取り除く土砂除去工程と、
前記領域に残存する土砂の上に、土砂、火山灰、及び岩石を破砕した細粒物のいずれか1又は2以上とセメントとの混合土を配置して散水する水分付与工程と、
水分を含有した前記混合土を転圧し、該混合土の表面高さ位置を前記舗装帯の表面高さ位置より低く均して固化させ混合土固化層を形成する混合土固化工程と、
前記混合土固化層の上に、硬化後に弾力性を有する水溶性アクリル樹脂を水に分散させた樹脂分散液を砂に加えて練って作製した樹脂混合砂モルタルを敷き詰め、該樹脂混合砂モルタルの表面を均して固化させ樹脂混合砂固化層を形成する樹脂混合砂固化工程とを有することを特徴とする道路の保護帯の形成工事方法。
A forming construction method of the protective band formed by connecting the pavement band of concrete or asphalt,
Sediment removal step of removing the soil in the surface layer portion of the region where the protective band is formed,
Moisturizing step of sprinkling water by placing mixed soil of any one or more of fine particles obtained by crushing earth and sand, volcanic ash, and rocks and cement on the earth and sand remaining in the region;
A mixed soil solidifying step of rolling the mixed soil containing moisture, and forming a mixed soil solidified layer by solidifying the surface height position of the mixed soil lower than the surface height position of the pavement;
A resin mixed sand mortar prepared by adding a resin dispersion in which a water- soluble acrylic resin having elasticity after being dispersed in water is added to sand and kneading is spread on the mixed soil solidified layer. A method for forming a protective zone for a road, comprising: a resin-mixed sand-solidifying step for forming a resin-mixed sand-solidified layer by leveling and solidifying a surface.
コンクリート又はアスファルトの舗装帯に連接して形成される保護帯の構造であって、
前記保護帯を形成する領域の表層部の土砂を取り除いたあとの残存土砂の上に、土砂、火山灰、及び岩石を破砕した細粒物のいずれか1又は2以上とセメントとの混合土からなる混合土固化層を設け、該混合土固化層の上に、硬化後に弾力性を有する水溶性アクリル樹脂と砂からなる樹脂混合砂固化層を設け、
前記混合土固化層は、前記残存土砂の上に配された前記混合土に散水し、転圧して該混合土の表面高さ位置を前記舗装帯の表面高さ位置より低く均して固化した層であって、前記樹脂混合砂固化層は、前記水溶性アクリル樹脂を水に分散させた樹脂分散液を砂に加えて練って作製した樹脂混合砂モルタルを前記混合土固化層の上に敷き詰め、該樹脂混合砂モルタルの表面を均して固化した層であることを特徴とする道路の保護帯の構造。
A protective band structure connected to a concrete or asphalt pavement band ,
Over the remaining sediment after removing the sediment surface layer portion in the region for forming the protective band, a mixed soil of sediment, volcanic ash, and either 1 or 2 or more and cement fines crushing rock A mixed soil solidified layer is provided, and a resin mixed sand solidified layer made of water-soluble acrylic resin and sand having elasticity after curing is provided on the mixed soil solidified layer,
The mixed soil solidified layer is sprinkled with water on the mixed soil disposed on the remaining soil and rolled to reduce the surface height position of the mixed soil to be lower than the surface height position of the pavement and solidified. The resin mixed sand solidified layer is a resin mixed sand mortar prepared by adding a resin dispersion obtained by dispersing the water- soluble acrylic resin in water and kneading the mixture onto the mixed soil solidified layer. A structure of a road protection zone, characterized in that it is a layer obtained by leveling and solidifying the surface of the resin mixed sand mortar.
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