JP4560843B2 - Construction method of protective structure - Google Patents

Construction method of protective structure Download PDF

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JP4560843B2
JP4560843B2 JP2006113822A JP2006113822A JP4560843B2 JP 4560843 B2 JP4560843 B2 JP 4560843B2 JP 2006113822 A JP2006113822 A JP 2006113822A JP 2006113822 A JP2006113822 A JP 2006113822A JP 4560843 B2 JP4560843 B2 JP 4560843B2
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valley
road
roof
mountain
protection structure
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JP2007285011A (en
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康夫 渡辺
正明 吉田
創士 山田
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日本サミコン株式会社
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
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Description

本発明は、谷側が傾斜面をなす道路を屋根により保護する保護構造物の施工方法に関する。 The present invention relates to a construction method of the protective structure valley is protected by roof road forming an inclined surface.

一般に、この種の構造物は、屋根を支持体により支持して構成されており、鋼製とＰＣ，ＲＣによるコンクリート製のものなどが知られている。例えば、コンクリート製のシェッドは、複数のコンクリート製の主桁を、被保護物である道路又は軌道の長手方向に向う横締用ＰＣ鋼材により一体に緊結して屋根を形成し、この屋根の道路又は軌道幅方向の両側を柱または壁に剛結して構成されている（例えば特許文献１及び２）。また、この種の保護構造物であるコンクリート製キーパーは、複数のコンクリート製主桁を道路又は軌道長さ方向に向かう横締用ＰＣ鋼材により一体に緊結して屋根を形成し、この屋根を道路又は軌道方向に山側に斜めに設置して構成されており、この屋根の支持構造は、屋根を下部工と柱に定着するものや下部工と山の壁部とに定着するもの（例えば、特許文献３及び特許文献４）などがある。   Generally, this type of structure is configured by supporting a roof with a support, and steel, concrete made of PC, RC, and the like are known. For example, a concrete shed forms a roof by integrally bonding a plurality of concrete main girders with a PC steel material for lateral fastening in the longitudinal direction of the road or track that is the object to be protected. Alternatively, both sides in the track width direction are rigidly connected to columns or walls (for example, Patent Documents 1 and 2). In addition, a concrete keeper, which is a protective structure of this type, forms a roof by integrally fastening a plurality of concrete main girders with PC steel for lateral fastening in the road or track length direction. Alternatively, the roof support structure is constructed obliquely on the mountain side in the track direction, and this roof support structure is fixed to the substructure and the pillar, or fixed to the substructure and the mountain wall (for example, patents) Document 3 and Patent Document 4).

そして、その主桁構造は断面Ｔ型のものや断面アーチ型のものなどが知られており、また、主桁の支持構造は主桁の両側を親柱と子柱で支持するもの、または、壁体である擁壁と親柱あるいは擁壁と擁壁とで支持するもの等種々のものが知られている。   And the main girder structure is known to have a T-shaped section or an arch-shaped section, and the supporting structure of the main girder is to support both sides of the main girder with a main column and a sub-column, or Various things are known, such as a retaining wall and a main pillar, which are walls, or a supporting wall supported by a retaining wall and a retaining wall.

ところで、雪崩や落石などの自然災害から屋根により保護しなければならない既設の狭小道路において、保護構造物を構築した後に道路の拡幅改良を行う場合、一般的に既設の保護構造物は、規格に適合できずに解体廃棄され、新規に拡幅断面を覆う保護構造物を構築しなければならず、無駄な建設費が嵩む事となる。
実公平１−４８９５号公報 特公平１−２７２２号公報 実開昭６２−１９６２２０号公報 特開平１−２４４００３号公報 By the way, in the case of existing narrow roads that must be protected from natural disasters such as avalanches and falling rocks with roofs, when constructing a protective structure and then improving the width of the road, the existing protective structure is generally A protective structure that covers the widened cross section must be newly constructed because it is dismantled and cannot be adapted, and wasteful construction costs increase.
No. 1-4895 Japanese Patent Publication No. 1-2722 Japanese Utility Model Publication No. 62-196220 JP-A-1-244003

そこで、本発明は、既設狭小道路の将来的な拡幅改良計画がある場合に、予め拡幅を考慮した保護構造物を念頭において設計された部材で当面の中間保護構造物を構築し、更に将来の拡幅の改良道路に対しても既設中間保護構造物と連結して保護構造物の完成断面を構築することができる保護構造物とその施工方法を提供する事を目的とする。   Therefore, when there is a future widening improvement plan for an existing narrow road, the present invention constructs an intermediate protection structure for the time being with a member designed with a protection structure in consideration of widening in advance, and further in the future. An object of the present invention is to provide a protection structure capable of constructing a completed cross section of the protection structure by connecting with an existing intermediate protection structure for a widened improved road, and a construction method thereof.

請求項１の発明は、谷側が傾斜面をなす道路の山側に設けられた山側支持体と、この山側支持体により支持され前記道路の少なくとも一部を覆う山側屋根とを有する中間保護構造物と、前記道路の谷側に設けられた谷側基礎と、この谷側基礎上に設けられた谷側支持体に支持されると共に、前記山側屋根に連結する谷側屋根と、この谷側屋根により覆われた前記道路の拡張部分と、を備える保護構造物の施工方法において、前記中間保護構造物を構築して前記道路の少なくとも一部を保護し、この後、前記道路の拡張が必要になったら、前記谷側基礎を構築し、この谷側基礎上に設けられた前記谷側支持体と、この谷側支持体により支持されると共に前記山側屋根に連結する前記谷側屋根を構築する施工方法である。 The invention according to claim 1 is an intermediate protection structure having a mountain side support provided on a mountain side of a road whose valley side forms an inclined surface, and a mountain side roof supported by the mountain side support and covering at least a part of the road. The valley side foundation provided on the valley side of the road, the valley side roof supported on the valley side support provided on the valley side foundation and connected to the mountain side roof, and the valley side roof A method for constructing a protective structure comprising an extended portion of the covered road , wherein the intermediate protective structure is constructed to protect at least a portion of the road, after which the road needs to be expanded. Once the valley side foundation is constructed, the valley side support provided on the valley side foundation, and the valley side roof supported by the valley side support and connected to the mountain side roof are constructed. Is the method .

また、請求項２の発明は、前記中間保護構造物は、前記保護構造物の谷側部分の増設を行っても、補強するための追加工事が不要な強度構造を備える施工方法である。 The invention according to claim 2 is a construction method in which the intermediate protection structure is provided with a strength structure that does not require additional work for reinforcement even if a valley side portion of the protection structure is added .

請求項１の構成によれば、道路の山側に山側支持体を設け、この山側支持体により山側屋根を支持した中間保護構造物を構築し、道路を保護する。そして、山側屋根により雪崩・落石などから道路を保護できる。この後、道路の拡張が必要になったら、谷側の傾斜面に谷側基礎を設け、この谷側基礎上に谷側支持体を設け、谷側屋根を谷側支持体により支持すると共に、既設の谷側屋根に連結して、保護構造物を構築し、谷側屋根に覆われた道路の拡張部分を形成し、道路を拡幅すると共に、山側と谷側の屋根により保護することができる。 According to the structure of Claim 1, the mountain side support body is provided in the mountain side of the road , the intermediate protection structure which supported the mountain side roof by this mountain side support body is constructed | assembled, and a road is protected. Then, to protect the road from, such as avalanches, falling rocks by the mountain side of the roof. After this, if it is necessary to expand the road , a valley side foundation is provided on the inclined surface of the valley side, a valley side support is provided on the valley side foundation, and the valley side roof is supported by the valley side support, linked to existing valley roof, building a protective structure, forms the extension of the covered the valley side roof roads, as well as widening the road, be protected by roof mountain and valley it can.

また、請求項１の構成によれば、中間保護構造物を構築し、道路を保護し、道路を使用する。そして、道路を拡張する時期がきたら、谷側基礎，谷側支持体及び山側屋根を構築し、山側屋根と谷側屋根とが連続する保護構造物を構築する。 Moreover, according to the structure of Claim 1 , an intermediate protection structure is built, a road is protected, and a road is used. Then, when it is time to expand the road, a valley-side foundation, a valley-side support and a mountain-side roof are constructed, and a protective structure in which the mountain-side roof and the valley-side roof are continuous is constructed.

また、谷側の工事においては、谷側屋根の山側を既設の山側屋根に連結するため、谷側基礎と谷側支持体の施工が終わった後は、谷側屋根の施工を簡便に行うことができる。 In addition, in the construction on the valley side, the mountain side of the valley side roof is connected to the existing mountain side roof, so after the construction of the valley side foundation and the valley side support is finished, the construction of the valley side roof should be done simply. Can do.

また、請求項１の構成によれば、前記道路の拡張部分を構築することにより、道路を拡張して使用することができる。 Further, according to the configuration of claim 1, by building the extension of the road, it can be used to extend the road.

また、請求項２の構成によれば、保護構造物の谷側部分の増設を行っても、補強するための追加工事が不要となる。Moreover, according to the structure of Claim 2, even if it enlarges the trough side part of a protection structure, the additional construction for reinforcement becomes unnecessary.

本発明における好適な実施の形態について、添付図面を参照しながら詳細に説明する。なお、以下に説明する実施の形態は、特許請求の範囲に記載された本発明の内容を限定するものではない。また、以下に説明される構成の全てが、本発明の必須要件であるとは限らない。各実施例では、従来とは異なる新規な保護構造物とその施工方法を採用することにより、従来にない保護構造物とその施工方法が得られ、その保護構造物とその施工方法について記述する。   Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by adopting a new protection structure and its construction method different from the conventional ones, a protection structure and its construction method which are not conventional are obtained, and the protection structure and its construction method will be described.

以下、本発明の実施例を添付図面を参照して説明する。図１〜図５は本発明の実施例１を示し、同図は、コンクリート製のシェッドである保護構造物１を用いた道路拡張構造を示し、被保護物たる既設の道路101は、山側Ｙの上向きの傾斜面102と谷側Ｔの下向きの傾斜面103との間に挟まれている。   Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 5 show Example 1 of the present invention, which shows a road expansion structure using a protective structure 1 that is a concrete shed, and an existing road 101 that is a protected object is a mountain side Y Sandwiched between the upward inclined surface 102 and the downward inclined surface 103 of the valley side T.

図３は、保護構造物１の山側部分を構成する中間保護構造物２を示し、この中間保護構造物２は、道路101の山側に設ける山側支持体３と、この山側支持体３により支持され道路101の少なくとも一部を覆う片持ち梁状の山側屋根４とからなる。   FIG. 3 shows an intermediate protection structure 2 constituting a mountain side portion of the protection structure 1, and this intermediate protection structure 2 is supported by a mountain side support 3 provided on the mountain side of the road 101 and this mountain side support 3. It consists of a cantilevered mountain-side roof 4 that covers at least part of the road 101.

前記山側支持体３は、道路101の下部に埋設するフーチング部５と、このフーチング部５の山側に立設される壁部材６とを備え、この壁部材６の上に、山側屋根４を構成する屋根部材７が連結される。   The mountain side support 3 includes a footing portion 5 embedded in a lower portion of the road 101 and a wall member 6 standing on the mountain side of the footing portion 5. A mountain side roof 4 is formed on the wall member 6. The roof members 7 to be connected are connected.

前記フーチング部５は、プレキャストコンクリート製品又は現場打ちコンクリートから形成され、この例では、道路（被保護物）長さ方向に所定長さを有するブロック状のプレキャストコンクリート製品が用いられ、その上面には、前記壁部材６のウエブ部８に対応して鉄筋９を突設している。   The footing portion 5 is formed from precast concrete product or cast-in-place concrete, and in this example, a block-shaped precast concrete product having a predetermined length in the road (protected object) length direction is used, and an upper surface thereof is used. Reinforcing bars 9 are provided so as to correspond to the web portions 8 of the wall member 6.

前記壁部材６は、プレキャストコンクリート製品からなり、その山側の平板部10の谷側外面中央に、上下方向の前記ウエブ部８を突出形成し、また、前記平板部10の谷側外面上端に横方向の上横梁部11を設け、この上横梁部11に、前記ウエブ部８の上端が連結され、そのウエブ部８の下端８Ｋは、平板部10の下端より上方に位置し、前記ウエブ部８の下端８Ｋから下方に向って鉄筋12が突設されている。   The wall member 6 is made of a precast concrete product, and the web portion 8 in the vertical direction protrudes from the center of the valley-side outer surface of the flat plate portion 10 on the mountain side. An upper horizontal beam portion 11 is provided, and an upper end of the web portion 8 is connected to the upper horizontal beam portion 11. A lower end 8K of the web portion 8 is located above a lower end of the flat plate portion 10, and the web portion 8 Reinforcing bars 12 are provided so as to project downward from the lower end 8K.

前記屋根部材７は、プレキャストコンクリート製品からなり、前記壁部材６と同一幅（道路長さ方向が同一）であり、前記平板部10に対応する断面略Ｌ字型の板状部15を有し、この板状部15は、上下方向の壁板部15Ａと道路幅方向の屋根板部15Ｂとを一体に備え、前記壁板部15Ａの下端に、前記壁部材６の上横梁部11に連結する下横梁部16を有し、さらに、前記屋根板部15Ｂの先端下面は、先端横梁部17を有し、それら横梁部16，17間で前記板状部15の幅方向中央にウエブ部18が設けられている。   The roof member 7 is made of a precast concrete product, has the same width as the wall member 6 (the road length direction is the same), and has a plate-like portion 15 having a substantially L-shaped cross section corresponding to the flat plate portion 10. The plate-like portion 15 is integrally provided with a wall plate portion 15A in the vertical direction and a roof plate portion 15B in the road width direction, and is connected to the upper horizontal beam portion 11 of the wall member 6 at the lower end of the wall plate portion 15A. And a lower end of the roof plate portion 15B has a front end cross beam portion 17, and a web portion 18 is formed between the cross beam portions 16 and 17 at the center in the width direction of the plate-like portion 15. Is provided.

また、前記壁部材６及び壁板部15Ａの背面（山側の面）と山側との間は、埋め戻し材により埋め戻され、下部には、埋め戻し材として現場打ちコンクリート21が充填され、この現場打ちコンクリート21の上には、埋め戻し材として発泡モルタル22が充填される。   Further, the space between the back surface (mountain side surface) and the mountain side of the wall member 6 and the wall plate portion 15A is backfilled with a backfilling material, and the lower part is filled with cast-in-place concrete 21 as a backfilling material. On the cast-in-place concrete 21, foam mortar 22 is filled as a backfill material.

次に、前記中間保護構造物２の施工方法について説明すると、既設の道路101の山側を掘削し、プレキャストコンクリート製品を道路長さ方向に複数並べると共に連結してフーチング部５を形成する。そのフーチング部５の山側に壁部材６を立設し、相互の鉄筋９，12を連結し、ウエブ部８の下部に型枠（図示せず）を組み、この型枠にコンクリートを打設して前記鉄筋９，12を埋設し、前記ウエブ部８に連続する現場打ちウエブ部８Ａを形成し、これにより、フーチング部５と壁部材６とを連結する。尚、平板部10の谷側面の下部も、現場打ちウエブ部８Ａに対応して、現場打ちコンクリートによりウエブ部８と同じ厚さに仕上げても良い。   Next, the construction method of the intermediate protection structure 2 will be described. The mountain side of the existing road 101 is excavated, and a plurality of precast concrete products are arranged and connected in the road length direction to form the footing portion 5. A wall member 6 is erected on the mountain side of the footing part 5, the rebars 9 and 12 are connected to each other, a formwork (not shown) is assembled at the lower part of the web part 8, and concrete is placed on the formwork. Then, the reinforcing bars 9 and 12 are embedded to form a cast-in-place web portion 8A continuous with the web portion 8, thereby connecting the footing portion 5 and the wall member 6. Note that the lower part of the side surface of the valley of the flat plate portion 10 may also be finished to the same thickness as the web portion 8 by on-site cast concrete corresponding to the on-site cast web portion 8A.

さらに、その壁部材６の上横梁部11と、屋根部材７の下横梁部16とを、ボルトナットやアンカーなどの連結具（図示せず）により連結し、山側支持体３に屋根部材７を連結支持する。尚、掘削した道路101は、埋め戻して通行を確保する。このように中間構造物２を構築し、被保護物である道路101を開放して通行を確保した後、必要に応じて所定期間経過した後、谷側の増設部分の工事を行う。   Further, the upper horizontal beam portion 11 of the wall member 6 and the lower horizontal beam portion 16 of the roof member 7 are connected by a connecting tool (not shown) such as a bolt nut or an anchor, and the roof member 7 is attached to the mountain side support 3. Support connection. The excavated road 101 is backfilled to ensure traffic. After constructing the intermediate structure 2 in this way and opening the road 101, which is a protected object, to secure traffic, if necessary, after a predetermined period of time has elapsed, construction of the additional portion on the valley side is performed.

また、土留壁となる山側支持体３の背面側は、現場打ちコンクリート21と発泡モルタル22により埋め戻す。このように中間保護構造物２の背面側上部を比較的軽量な発泡モルタルにより埋め戻すから、背面土圧を軽減することができ、また、道路101の下部に埋設され、壁部材６位置より谷側に突出したフーチング部５により、安定した構造が得られる。そして、また、本実施例の特徴として、中間保護構造物２は、保護構造物１が完成した状態で、必要な部材強度を予め備えている。すなわち、中間保護構造物２は構築された後、保護構造物１の谷側部分の増設を行っても、中間保護構造物２を補強するための追加工事が不要な強度構造を予め備える。   In addition, the back side of the mountain side support 3 that becomes a retaining wall is backfilled with cast-in-place concrete 21 and foamed mortar 22. Thus, since the upper part on the back side of the intermediate protective structure 2 is backfilled with a relatively lightweight foamed mortar, the earth pressure on the back side can be reduced. A stable structure is obtained by the footing part 5 protruding to the side. In addition, as a feature of the present embodiment, the intermediate protection structure 2 has a necessary member strength in advance in a state where the protection structure 1 is completed. That is, after the intermediate protection structure 2 is constructed, a strength structure that does not require additional work for reinforcing the intermediate protection structure 2 is provided in advance even if the valley side portion of the protection structure 1 is added.

このように中間保護構造物２の施工が完了したら、道路101の上部の一部が屋根部材７に覆われ、雪崩や落石などから道路101を保護し、通行を確保することができる。   When the construction of the intermediate protective structure 2 is completed in this way, a part of the upper portion of the road 101 is covered with the roof member 7, so that the road 101 can be protected from avalanches and falling rocks and traffic can be secured.

そして、所定の期間が過ぎるか、道路101の拡張が必要になったら、中間保護構造物２の谷側の工事を行い、すなわち増設工事を行い、保護構造物１を構築する。   Then, when the predetermined period has passed or the road 101 needs to be expanded, construction of the valley side of the intermediate protective structure 2 is performed, that is, expansion work is performed, and the protective structure 1 is constructed.

保護構造物１の谷側は、前記傾斜面103に道路長さ方向に所定間隔で基礎杭31，31…を打設し、これら基礎杭31，31…の上に道路長さ方向に連続する基礎梁32を構築する。前記基礎杭31は鋼管杭やコンクリート杭など各種の杭が用いられ、前記基礎梁32は、プレキャストコンクリート製品を並べて形成したり、現場で型枠を組んでコンクリートを打設して形成される。   The trough side of the protective structure 1 is laid with foundation piles 31, 31... At predetermined intervals in the road length direction on the inclined surface 103, and continues in the road length direction on these foundation piles 31, 31. Build foundation beam 32. As the foundation pile 31, various types of piles such as steel pipe piles and concrete piles are used, and the foundation beam 32 is formed by arranging precast concrete products side by side or by forming concrete on a site and forming concrete.

そして、前記基礎杭31と基礎梁32とにより谷側基礎33が構成され、谷側基礎33の施工が完了した後、谷側支持体と谷側屋根の施工を行う。   And the valley side foundation 33 is comprised by the said foundation pile 31 and the foundation beam 32, and after construction of the valley side foundation 33 is completed, construction of a valley side support body and a valley side roof is performed.

前記谷側支持体は、プレキャストコンクリート製の柱34であり、図２に示すように、道路長さ方向に所定間隔を置いて前記基礎梁32上に立設され、この例では、柱34の下部を前記基礎梁32に埋設固定している。また、前記基礎梁32の山側上部には、段部32Ａが形成されている。   The valley support is a precast concrete column 34, and as shown in FIG. 2, is erected on the foundation beam 32 at a predetermined interval in the road length direction. The lower part is embedded and fixed to the foundation beam 32. A step 32A is formed at the top of the base beam 32 on the mountain side.

また、谷側屋根41は、複数のプレキャストコンクリート製主桁42を、道路101の長さ方向に並べて形成され、その主桁42は、平板部43の下面両側で道路長さ方向の横梁部44，45を設けると共に、その下面の中央に前記横梁部44，45と交差するウエブ部46を設けてなる。そして、前記柱34の上部に前記ウエブ部46を載置し、柱34の上部と主桁42の谷側とをアンカー47により連結する。一方、主桁42の谷側は、その横梁部44と山側屋根４の先端横梁部17とを突き合せ、ウエブ部18とウエブ部46に挿通したＰＣ鋼材（図示せず）により屋根板部15Ｂと主桁42を一体化したり、アウトケーブル（図示せず）により屋根板部15Ｂと主桁42とを一体化したりし、これにより山側屋根４の谷側端に、谷側屋根41の山側端を連結する。尚、プレキャストコンクリート製品の主桁42は、前記壁部材６及び屋根部材７と同一幅（道路長さ方向が同一）である。   Further, the valley side roof 41 is formed by arranging a plurality of precast concrete main girders 42 in the length direction of the road 101, and the main girders 42 are lateral beam portions 44 in the road length direction on both sides of the lower surface of the flat plate portion 43. , 45 and a web portion 46 that intersects the transverse beam portions 44, 45 at the center of the lower surface thereof. Then, the web portion 46 is placed on the upper portion of the column 34, and the upper portion of the column 34 and the valley side of the main girder 42 are connected by an anchor 47. On the other hand, the valley side of the main girder 42 abuts the cross beam portion 44 and the tip side cross beam portion 17 of the mountain side roof 4, and the roof plate portion 15B is made of a PC steel material (not shown) inserted through the web portion 18 and the web portion 46. And the main girder 42 are integrated, or the roof plate portion 15B and the main girder 42 are integrated by an out cable (not shown), whereby the mountain side end of the mountain side roof 41 and the mountain side end of the valley side roof 41 are integrated. Are connected. The main girder 42 of the precast concrete product has the same width (the same road length direction) as the wall member 6 and the roof member 7.

また、道路101の谷側の傾斜面103は基礎梁32の段部32Ａまで埋め戻して拡張部分101Ｋを形成し、既設の道路101と拡張部分101Ｋとは山側屋根４及び谷側屋根41により覆われる。   Further, the inclined surface 103 on the valley side of the road 101 is backfilled to the step 32A of the foundation beam 32 to form an extended portion 101K. The existing road 101 and the extended portion 101K are covered with the mountain side roof 4 and the valley side roof 41. Is called.

このように、山側の中間保護構造物２を先に構築し、残りの谷側を増設するようにして保護構造物１を構築するため、道路101の通行止め期間を短くし、通行を確保しつつ、保護構造物１を構築することができる。   In this way, the intermediate protection structure 2 on the mountain side is constructed first, and the protection structure 1 is constructed so as to add the remaining valley side, so that the road 101 is closed and the passage is secured. The protective structure 1 can be constructed.

そして、この種の既設の道路101は、幅員が狭く、迂回路を確保できない場合が多く、また、施工機械も小型の機械に制限される場合が多く、上部工をプレキャストコンクリート部材とし、軽量化を図り、交通規制区間の短縮と小型の施工機械を用いた屋根などの架設を行うことができる。   And this type of existing road 101 is narrow in width and often cannot secure a detour, and the construction machine is often limited to a small machine, and the superstructure is made of a precast concrete member to reduce the weight. It is possible to shorten the traffic regulation section and to construct a roof using a small construction machine.

上記の構成によれば、既設の道路101の防災対策として、中間保護構造物２を構築し、当面の自然災害からの安全を確保することができ、また、時代の流れで道路101を拡幅する計画が将来計画としてあるような場合に、中間保護構造物２を拡幅できるように予め配慮した保護構造物１であるから、従来のように、既設の保護構造物を解体して新規に拡幅断面を覆う保護構造物を構築する場合に比べて、極めで無駄がなく、全体として建設費を抑えることができ、経済的効果に優れた保護構造物１となる。   According to the above configuration, the intermediate protection structure 2 can be constructed as a disaster prevention measure for the existing road 101 to ensure safety from natural disasters for the time being, and the road 101 is widened with the passage of time. Since the protection structure 1 is designed in advance so that the intermediate protection structure 2 can be widened when the plan is a future plan, the existing protection structure is dismantled and newly widened cross-section as before. Compared with the case of constructing a protective structure that covers the protective structure, the construction structure can be reduced as a whole, the construction cost can be suppressed, and the protective structure 1 is excellent in economic effect.

このように本実施例では、請求項１に対応して、谷側Ｔが傾斜面103をなす被保護物たる道路101の山側Ｙに設けられた山側支持体３と、この山側支持体３により支持され道路101の少なくとも一部を覆う山側屋根４とを有する中間保護構造物２と、道路101の谷側に設けられた谷側基礎33と、この谷側基礎33上に設けられた谷側支持体たる柱34に支持されると共に、山側屋根４に連結する谷側屋根41と、この谷側屋根41により覆われた道路101の拡張部分101Ｋと、を備える保護構造物１の施工方法において、中間保護構造物２を構築して道路101の少なくとも一部を保護し、この後、道路101の拡張が必要になったら、谷側基礎33を構築し、この谷側基礎33上に設けられた柱34と、この柱34により支持されると共に山側屋根４に連結する谷側屋根41を構築するから、道路101の山側Ｙに山側支持体３を設け、この山側支持体３により山側屋根４を支持した中間保護構造物２を構築し、既設の道路101を保護することができる。そして、被保護物が道路101であれば、山側屋根４により雪崩・落石などから道路10を保護できる。この後、道路101の拡張が必要になったら、谷側Ｔに谷側基礎33を設け、この谷側基礎33上に柱34を設け、谷側屋根41を柱34により支持すると共に、既設の山側屋根４に連結して、保護構造物１を構築し、谷側屋根41に覆われた被保護物の拡張部分101Ｋを形成し、道路101を拡幅すると共に、山側と谷側の屋根４，41により保護することができる。 Thus, in the present embodiment, corresponding to claim 1, the mountain side support 3 provided on the mountain side Y of the road 101, which is the protected object, the valley side T forms the inclined surface 103, and the mountain side support 3 Intermediate protection structure 2 having a mountain side roof 4 that is supported and covers at least a part of road 101, a valley side foundation 33 provided on the valley side of road 101, and a valley side provided on this valley side foundation 33 In the construction method of the protection structure 1, which is supported by the pillar 34 as a support body and includes the valley side roof 41 connected to the mountain side roof 4 and the extended portion 101 </ b> K of the road 101 covered by the valley side roof 41 . The intermediate protection structure 2 is constructed to protect at least a part of the road 101. After that, when the road 101 needs to be expanded, the valley side foundation 33 is constructed and is provided on the valley side foundation 33. a pillar 34, or constructing a valley roof 41 which connects to the mountain side roof 4 while being supported by the posts 34 The mountain side support 3 provided on the mountain side Y of the road 101, the by mountain support 3 constructed of the intermediate protective structure 2 supporting the mountain side roof 4, it is possible to protect the road 101 existing. If the object to be protected is the road 101, the mountain side roof 4 can protect the road 10 from avalanches and falling rocks. After this, when it becomes necessary to expand the road 101 , a valley-side foundation 33 is provided on the valley-side T , a pillar 34 is provided on the valley-side foundation 33, and the valley-side roof 41 is supported by the pillar 34. linked to the mountain side roof 4, to build a protective structure 1, to form an extended portion 101K of the protected object covered the valley side roof 41, as well as widening the road 101, the mountain and valley roofing 4 , 41 can be protected.

また、このように本実施例では、請求項１に対応して、中間保護構造物２を構築し、道路101を保護し、道路101を使用できる。そして、道路101を拡張する時期がきたら、谷側基礎33，柱34及び山側屋根41を構築し、山側屋根41と谷側屋根４とが連続する保護構造物１を構築する。 Further, in the present embodiment thus, corresponding to claim 1, building a middle between protective structures 2, to protect the road 101, the road 101 may be used. Then, when it is time to expand the road 101, the valley side foundation 33, the pillar 34, and the mountain side roof 41 are constructed, and the protective structure 1 in which the mountain side roof 41 and the valley side roof 4 are continuous is constructed.

このように、山側Ｙの工事を行った後、期間を置いて谷側Ｔの工事を行うことができ、通行止めの期間を短くして、工事期間中の通行を確保しつつ工事を行うことができる。また、谷側Ｔの工事においては、谷側屋根41の山側を既設の山側屋根４に連結するため、谷側基礎33と柱34の施工が終わった後は、谷側屋根41の施工を簡便に行うことができる。 Thus, after the construction on the mountain side Y, the construction on the valley side T can be carried out after a period of time, and the construction can be carried out while securing the traffic during the construction period by shortening the period of closure. it can. Moreover, in the construction of the valley side T, the mountain side of the valley side roof 41 is connected to the existing mountain side roof 4, so that the construction of the valley side roof 41 is simplified after the construction of the valley side foundation 33 and the pillar 34 is finished. Can be done.

また、このように本実施例では、請求項１に対応して、谷側屋根41に覆われる被保護物たる道路101の拡張部分101Ｋを形成するから、道路101を拡張して使用することができる。 In this way, in this embodiment, in correspondence with claim 1 , since the extended portion 101K of the road 101 which is a protected object covered by the valley-side roof 41 is formed, the road 101 can be extended and used. it can.

また、このように本実施例では、請求項２に対応して、中間保護構造物２は、保護構造物１の谷側部分の増設を行っても、補強するための追加工事が不要な強度構造を備える。 In this way, in this embodiment, corresponding to claim 2, the intermediate protective structure 2 has a strength that does not require additional work for reinforcement even if the valley portion of the protective structure 1 is added. Provide structure.

また、実施例上の効果として、壁部材６と屋根部材７とをプレキャストコンクリート製品としたから、現場でフーチング部５を形成し、このフーチング部５と壁部材６と屋根部材７を略コ字形に組み立てて、中間保護構造物２を簡便に構築することができる。また、フーチング部５と壁部材６とに鉄筋９，12を設け、これら鉄筋９，12を現場打ちコンクリートにより埋設することにより、両者を一体化できる。尚、壁部材６と屋根部材７とにＰＣ鋼材（図示せず）を挿通し、このＰＣ鋼材により両者を連結一体化してもよい。   Further, as an effect of the embodiment, since the wall member 6 and the roof member 7 are precast concrete products, the footing portion 5 is formed on the site, and the footing portion 5, the wall member 6 and the roof member 7 are substantially U-shaped. As a result, the intermediate protective structure 2 can be easily constructed. Moreover, both the reinforcement can be integrated by providing the reinforcing bars 9 and 12 in the footing part 5 and the wall member 6, and embedding these reinforcing bars 9 and 12 by the cast-in-place concrete. Note that a PC steel material (not shown) may be inserted into the wall member 6 and the roof member 7, and the PC steel material may be connected and integrated.

図６〜図８は本発明の実施例２を示し、上記各実施例と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、図６に示すように、この例の保護構造物１Ａでは、中間保護構造物２Ａの山側支持体３Ａは、フーチング部５Ａと壁部６Ａとを一体に備える壁体51と、この壁体51のフーチング部５Ａに立設した柱部材52，52…と、これら柱部材52，52…の上に設ける梁部材53とからなる。前記柱部材52は断面が方形又は円形であって、その上端面は平坦に形成され、また、前記梁部材53は断面略方形で、上，下面が平坦に形成され、前記柱部材52の上端面からアンカー52Ａが突設され、このアンカー52Ａを挿通する挿通孔53Ａが前記梁部材53に形成されている。また、前記壁体51の上面51Ａは平坦に形成されている。   6 to 8 show a second embodiment of the present invention. The same reference numerals are given to the same portions as those of the above-described embodiments, and detailed description thereof will be omitted. As shown in FIG. In the protective structure 1A, the mountain side support 3A of the intermediate protective structure 2A includes a wall body 51 integrally including a footing portion 5A and a wall portion 6A, and a column member erected on the footing portion 5A of the wall body 51. .. And a beam member 53 provided on these column members 52, 52. The column member 52 is square or circular in cross section, and its upper end surface is formed flat. The beam member 53 is substantially square in cross section, and the upper and lower surfaces are formed flat. An anchor 52A protrudes from the end face, and an insertion hole 53A through which the anchor 52A is inserted is formed in the beam member 53. Further, the upper surface 51A of the wall body 51 is formed flat.

また、山側屋根４Ａは、複数のプレキャストコンクリート製主桁62を道路101の長さ方向に並べて形成され、その主桁62は、平板部63の下面両側で道路長さ方向の横梁部64，65を設けると共に、その下面の中央に前記横梁部64，65と交差するウエブ部66を設けてなり、山側の前記横梁部64は道路幅員方向に幅広に形成されている。尚、プレキャストコンクリート製品の主桁42Ａは、前記主桁62と同一幅（道路長さ方向が同一）である。   The mountain side roof 4A is formed by arranging a plurality of precast concrete main girders 62 in the length direction of the road 101. The main girders 62 are transverse beam portions 64, 65 in the road length direction on both sides of the lower surface of the flat plate portion 63. And a web portion 66 that intersects the transverse beam portions 64 and 65 at the center of the lower surface thereof, and the mountain side transverse beam portion 64 is formed wide in the road width direction. The main beam 42A of the precast concrete product has the same width as the main beam 62 (the road length direction is the same).

そして、道路101の山側を掘削し、ここに前記壁体51の型枠を組み、この型枠内にコンクリートを打設し、壁体51を道路長さ方向に連続して構築し、そのフーチング部５Ａの上面に、プレキャストコンクリート製の前記柱部材52を立設する。この例では、柱部材52の下部を前記フーチング部５Ａに埋設固定している。   Then, the mountain side of the road 101 is excavated, the formwork of the wall body 51 is assembled here, concrete is placed in the formwork, and the wall body 51 is continuously constructed in the road length direction, and its footing The column member 52 made of precast concrete is erected on the upper surface of the part 5A. In this example, the lower part of the column member 52 is embedded and fixed in the footing part 5A.

そして、図７に示すように、複数の柱部材52，52…を道路長さ方向に間隔を置いて立設したら、複数の柱部材52，52の上に、プレキャストコンクリート製の前記梁部材53を載置する。この場合、前記アンカー52Ａを挿通孔53Ａに挿通するようにして梁部材53を柱部材52，52上に載置する。また、隣り合う梁部材53，53の間には、調整隙間54を設ける。この調整隙間54を設けることにより、道路101の曲線部分において、隣り合う梁部材53，53の向きを変えて前記曲線部分に対応することができる。   Then, as shown in FIG. 7, when the plurality of column members 52, 52... Are erected at intervals in the road length direction, the beam members 53 made of precast concrete are placed on the plurality of column members 52, 52. Is placed. In this case, the beam member 53 is placed on the column members 52 and 52 so that the anchor 52A is inserted into the insertion hole 53A. An adjustment gap 54 is provided between the adjacent beam members 53 and 53. By providing the adjustment gap 54, the direction of the adjacent beam members 53, 53 can be changed in the curved portion of the road 101 to correspond to the curved portion.

梁部材53の施工が終わり、山側支持体３Ａが完成したら、山側屋根４Ａの施工を行う。山側屋根４Ａは、複数のプレキャストコンクリート製主桁62を道路101の長さ方向に並べて形成され、この際、各主桁62の山側下面を壁体51の上面51Ａに載置し、前記壁体51と主桁62とをＰＣ鋼材67により連結し、横梁部64の谷側下面を前記梁部材53の上に載置する。   When the construction of the beam member 53 is completed and the mountain side support 3A is completed, the mountain side roof 4A is constructed. The mountain-side roof 4A is formed by arranging a plurality of precast concrete main girders 62 in the length direction of the road 101. At this time, the mountain-side lower surface of each main girder 62 is placed on the upper surface 51A of the wall body 51, 51 and the main girder 62 are connected to each other by a PC steel material 67, and the bottom side of the valley side of the horizontal beam portion 64 is placed on the beam member 53.

こうして、中間保護構造物２Ａを構築し、道路101の拡張が必要になったら、谷側を増設し、保護構造物１Ａを完成させる。この例では、柱34Ａは断面が方形又は円形であって、前記柱部材52と略同一構成であり、その柱34Ａを道路長さ方向に所定間隔を置いて前記基礎梁32上に立設し、それら道路長さ方向に並んだ柱34Ａ，34Ａ…の上に、プレキャストコンクリート製の前記梁部材53を載置し、柱34Ａと梁部材53とを図示しない連結手段により連結する。また、隣り合う梁部材53，53の間には、調整隙間54を設ける。この調整隙間54を設けることにより、道路101の曲線部分において、隣り合う梁部材53，53の向きを変えて前記曲線部分に対応することができる。   Thus, the intermediate protection structure 2A is constructed, and when the road 101 needs to be expanded, the valley side is added to complete the protection structure 1A. In this example, the pillar 34A has a square or circular cross section and has substantially the same configuration as the pillar member 52. The pillar 34A is erected on the foundation beam 32 at a predetermined interval in the road length direction. The beam members 53 made of precast concrete are placed on the columns 34A, 34A,... Aligned in the road length direction, and the columns 34A and the beam members 53 are connected by a connecting means (not shown). An adjustment gap 54 is provided between the adjacent beam members 53 and 53. By providing this adjustment gap 54, the direction of the adjacent beam members 53, 53 can be changed in the curved portion of the road 101 to correspond to the curved portion.

また、谷側屋根41Ａは、複数のプレキャストコンクリート製主桁42Ａを、道路101の長さ方向に並べて形成され、その主桁42Ａは、平板部43Ａの下面両側で道路長さ方向の横梁部44Ａ，45Ａを設けると共に、その下面の中央に前記横梁部44Ａ，45Ａと交差するウエブ部46Ａを設けてなる。そして、前記梁部材53の上部に前記ウエブ部45Ａを載置し、柱34Ａの上部と主桁42Ａの谷側とをアンカー47Ａにより連結する。一方、主桁42Ａの谷側は、その横梁部44Ａと山側屋根４Ａの先端横梁部65とを突き合せ、ウエブ部66とウエブ部46Ａに挿通したＰＣ鋼材（図示せず）により主桁62Ａと主桁42Ａを一体化したり、アウトケーブル（図示せず）により主桁62Ａと主桁42Ａとを一体化したりし、これにより山側屋根４Ａの谷側端に、谷側屋根41Ａの山側端を連結する。   The valley-side roof 41A is formed by arranging a plurality of precast concrete main girders 42A in the length direction of the road 101. The main girders 42A are transverse beam portions 44A in the road length direction on both sides of the lower surface of the flat plate portion 43A. , 45A and a web portion 46A intersecting with the horizontal beam portions 44A, 45A at the center of the lower surface thereof. Then, the web portion 45A is mounted on the upper portion of the beam member 53, and the upper portion of the column 34A and the valley side of the main girder 42A are connected by an anchor 47A. On the other hand, the trough side of the main girder 42A is connected to the main girder 62A by a PC steel material (not shown) inserted into the web portion 66 and the web portion 46A by abutting the cross beam portion 44A with the tip side cross beam portion 65 of the mountain side roof 4A. The main girder 42A is integrated, or the main girder 62A and the main girder 42A are integrated by an out cable (not shown), thereby connecting the mountain side end of the valley side roof 41A to the valley side end of the mountain side roof 4A. To do.

そして、図６に示すように、谷側屋根41Ａと山側屋根４Ａとは、そのウエブ部66とウエブ部46Ａの山側を厚く形成すると共にこれより谷側を薄く形成し、谷側から山側に向って徐々に厚くなるように形成されている。   As shown in FIG. 6, the valley-side roof 41A and the mountain-side roof 4A are formed such that the mountain side of the web portion 66 and the web portion 46A is thick, and the valley side is formed thinner than this, from the valley side toward the mountain side. It is formed to become gradually thicker.

このように本実施例においても、中間保護構造物２Ａを拡幅できるように予め配慮した保護構造物１Ａであるから、極めで無駄がなく、経済的効果に優れた保護構造物１Ａとなり、各請求項に対応して、上記実施例１と同様な作用・効果を奏する。   Thus, also in this embodiment, since the protection structure 1A is considered in advance so that the intermediate protection structure 2A can be widened, the protection structure 1A is extremely thin, has no waste, and has an excellent economic effect. Corresponding to the item, the same operations and effects as the first embodiment are obtained.

また、実施例上の効果として、柱部材52，梁部材53及び主桁62をプレキャストコンクリート製としたから、壁体51の構築後、山側屋根４Ａを簡便に構築することができる。   Further, as an effect of the embodiment, since the column member 52, the beam member 53, and the main girder 62 are made of precast concrete, the mountain-side roof 4A can be easily constructed after the wall body 51 is constructed.

図９〜図１１は本発明の実施例３を示し、上記各実施例と同一部分に同一符号を付し、その詳細な説明を省略して詳述すると、図９に示すように、この例の保護構造物１Ｂでは、中間保護構造物２Ｂの山側支持体３Ｂは、フーチング部５Ｂと壁部６Ｂとを一体に備える壁体51Ａと、この壁体51Ａと山側屋根４Ｂの下面との間に設ける斜材71とからなる。尚、斜材71は、各主桁62Ａの１枚毎に１つ用いられる。   9 to 11 show a third embodiment of the present invention. The same reference numerals are given to the same parts as those of the above-mentioned embodiments, and detailed description thereof will be omitted. As shown in FIG. In the protection structure 1B, the mountain side support 3B of the intermediate protection structure 2B includes a wall body 51A integrally including a footing portion 5B and a wall portion 6B, and the wall body 51A and the lower surface of the mountain side roof 4B. The diagonal member 71 is provided. Note that one diagonal member 71 is used for each main beam 62A.

前記壁部６Ｂは、前面72が略垂で、その下端には、前記フーチング部５Ｂが谷側に僅かに張り出して設けられ、その前面72の上部に段部73を形成し、この段部73の上に、山側屋根４Ｂの端部を載置する段部状の載置面74が形成されている。また、前記壁体51Ａの背面75は斜めに形成され、この背面75と前面72との間隔が下方に向って狭まっている。   The wall portion 6B has a front surface 72 that is substantially drooping, and the footing portion 5B is provided at the lower end of the wall portion 6B so as to slightly protrude toward the valley side. A step portion 73 is formed on the upper portion of the front surface 72. A stepped mounting surface 74 for mounting the end of the mountain side roof 4B is formed thereon. The back surface 75 of the wall body 51A is formed obliquely, and the distance between the back surface 75 and the front surface 72 is narrowed downward.

また、山側屋根４Ｂは、複数のプレキャストコンクリート製主桁62Ａを道路101の長さ方向に並べて形成され、その主桁62Ａは、平板部63Ａの下面両側に道路長さ方向の横梁部64Ａ，65Ａを設け、さらに、それら両側の横梁部64Ａ，65Ａの間に中間の横梁部67Ａを設け、その下面の中央に前記横梁部64Ａ，65Ａ，67Ａと交差するウエブ部66Ａを設け、このウエブ部66Ａの中央下部に、前記斜材71の受け面68Ａを設ける。尚、プレキャストコンクリート製品の主桁62Ａは、前記主桁42と同一幅（道路長さ方向が同一）である。   Further, the mountain roof 4B is formed by arranging a plurality of precast concrete main girders 62A in the length direction of the road 101, and the main girders 62A are arranged on both sides of the lower surface of the flat plate portion 63A on the lateral beam portions 64A, 65A in the road length direction. Furthermore, an intermediate cross beam portion 67A is provided between the cross beam portions 64A and 65A on both sides, and a web portion 66A intersecting with the cross beam portions 64A, 65A and 67A is provided at the center of the lower surface. A receiving surface 68A of the diagonal member 71 is provided at the lower center of the center. The main beam 62A of the precast concrete product has the same width as the main beam 42 (the road length direction is the same).

また、前記段部73はその角部を斜面76に形成し、この斜面76に前記斜材71の下端を挿入する挿入孔77を形成する。   Further, the stepped portion 73 has a corner portion formed on the slope 76, and an insertion hole 77 into which the lower end of the diagonal member 71 is inserted is formed on the slope 76.

そして、道路101の山側を掘削し、ここに前記壁体51Ａの型枠を組み、この型枠内にコンクリートを打設し、壁体51Ａを道路長さ方向に連続して構築し、その挿入孔77に斜材71の下端を挿入して必要に応じて固定する。   Then, the mountain side of the road 101 is excavated, the form of the wall 51A is assembled here, concrete is placed in the form, and the wall 51A is continuously constructed in the road length direction. The lower end of the diagonal member 71 is inserted into the hole 77 and fixed as necessary.

こうして山側支持体３Ｂが完成したら、山側屋根４Ｂの施工を行う。山側屋根４Ｂは、複数のプレキャストコンクリート製主桁62Ａを道路101の長さ方向に並べて形成され、この際、各主桁62Ａの山側下面を壁体51Ａの載置面74に載置し、また、斜材71の上端面を受け面68Ａに当接支持し、必要に応じて固定し、前記載置面74と主桁62Ａとをアンカー69により連結する。   When the mountain side support 3B is thus completed, the mountain side roof 4B is constructed. The mountain side roof 4B is formed by arranging a plurality of precast concrete main girders 62A in the length direction of the road 101. At this time, the mountain side lower surface of each main girder 62A is placed on the placement surface 74 of the wall 51A. The upper end surface of the diagonal member 71 is abutted and supported on the receiving surface 68A, fixed as necessary, and the mounting surface 74 and the main beam 62A are connected by the anchor 69.

こうして、中間保護構造物２Ｂを構築し、道路101の拡張が必要になったら、谷側を増設し、保護構造物１Ｂを完成させる。   Thus, the intermediate protection structure 2B is constructed, and when the road 101 needs to be expanded, the valley side is added to complete the protection structure 1B.

また、谷側屋根41は、複数のプレキャストコンクリート製主桁42を、道路101の長さ方向に並べて形成され、その主桁42は、平板部43の下面両側で道路長さ方向の横梁部44，45を設けると共に、その下面の中央に前記横梁部44，45と交差するウエブ部46を設けてなる。そして、前記柱34の上部に前記ウエブ部46の下面を載置し、柱34の上部と主桁42の谷側とをアンカー47により連結する。一方、主桁42の谷側は、その横梁部44と山側屋根４Ｂの先端横梁部66Ａとを突き合せ、ウエブ部66Ａとウエブ部46に挿通したＰＣ鋼材（図示せず）により主桁62Ａと主桁42を一体化したり、アウトケーブル（図示せず）により屋根板部15Ｂと主桁42とを一体化したりし、これにより山側屋根４Ｂの谷側端に、谷側屋根41の山側端を連結する。   Further, the valley side roof 41 is formed by arranging a plurality of precast concrete main girders 42 in the length direction of the road 101, and the main girders 42 are lateral beam portions 44 in the road length direction on both sides of the lower surface of the flat plate portion 43. , 45 and a web portion 46 that intersects the transverse beam portions 44, 45 at the center of the lower surface thereof. Then, the lower surface of the web portion 46 is placed on the upper portion of the column 34, and the upper portion of the column 34 and the valley side of the main girder 42 are connected by an anchor 47. On the other hand, the trough side of the main girder 42 is connected to the main girder 62A by a PC steel material (not shown) inserted into the web portion 66A and the web portion 46 by abutting the cross beam portion 44 and the front end cross beam portion 66A of the mountain side roof 4B. The main girder 42 is integrated, or the roof plate portion 15B and the main girder 42 are integrated by an out cable (not shown), whereby the mountain side end of the valley side roof 41 is connected to the valley side end of the mountain side roof 4B. Link.

このように本実施例においても、中間保護構造物２Ｂを拡幅できるように予め配慮した保護構造物１Ｂであるから、極めで無駄がなく、経済的効果に優れた保護構造物１Ａとなり、各請求項に対応して、上記実施例１と同様な作用・効果を奏する。   Thus, also in the present embodiment, since the protection structure 1B is considered in advance so that the intermediate protection structure 2B can be widened, the protection structure 1A is extremely thin, has no waste, and has an excellent economic effect. Corresponding to the item, the same operations and effects as the first embodiment are obtained.

また、実施例上の効果として、壁体51Ａと主桁62Ａとの間に、該主桁62Ａの載置面74より谷側を支持する斜材71を設けることにより、壁体51Ａを比較的小型化することができ、現場での掘削及び型枠作業を簡略化できる。   Further, as an effect of the embodiment, by providing an oblique member 71 that supports the valley side from the mounting surface 74 of the main girder 62A between the wall body 51A and the main girder 62A, the wall body 51A is relatively The size can be reduced, and excavation and formwork on site can be simplified.

なお、本発明は、前記実施例に限定されるものではなく、種々の変形実施が可能である。例えば、山側支持体，谷側支持体，山側基礎及び谷側基礎は各種の構造を用いることができる。   In addition, this invention is not limited to the said Example, A various deformation | transformation implementation is possible. For example, various structures can be used for the mountain side support, the valley side support, the mountain side foundation, and the valley side foundation.

本発明の実施例１を示す保護構造物の断面図である。It is sectional drawing of the protection structure which shows Example 1 of this invention. 同上、保護構造物の側面図である。It is a side view of a protection structure same as the above. 同上、中間保護構造物の断面図である。It is sectional drawing of an intermediate protection structure same as the above. 同上、中間保護構造物を分割した断面図である。It is sectional drawing which divided the intermediate protection structure same as the above. 同上、図４のＡ−Ａ線断面図である。FIG. 5 is a sectional view taken along line AA in FIG. 本発明の実施例２を示す保護構造物の断面図である。It is sectional drawing of the protection structure which shows Example 2 of this invention. 同上、保護構造物の側面図である。It is a side view of a protection structure same as the above. 同上、中間保護構造物の断面図である。It is sectional drawing of an intermediate protection structure same as the above. 本発明の実施例４を示す保護構造物の断面図である。It is sectional drawing of the protection structure which shows Example 4 of this invention. 同上、保護構造物の側面図である。It is a side view of a protection structure same as the above. 同上、中間保護構造物の断面図である。It is sectional drawing of an intermediate protection structure same as the above.

１，１Ａ，１Ｂ 保護構造物（シェッド）
２，２Ａ，２Ｂ 中間保護構造物
３，３Ａ，３Ｂ 山側支持体
４，４Ａ，４Ｂ 山側屋根
33 谷側基礎
34，34Ａ 柱（谷側支持体）
41，41Ａ 谷側屋根
101 道路（被保護物）
101Ｋ 拡張部分
103 傾斜面
Ｙ 山側
Ｔ 谷側 1,1A, 1B Protective structure (shed)
2,2A, 2B Intermediate protective structure 3,3A, 3B Mountain side support 4,4A, 4B Mountain side roof
33 Valley side foundation
34, 34A Pillar (valley side support)
41, 41A Valley side roof
101 road (protected object)
101K extension
103 Inclined surface Y Mountain side T Valley side

Claims (2)

谷側が傾斜面をなす道路の山側に設けられた山側支持体と、この山側支持体により支持され前記道路の少なくとも一部を覆う山側屋根とを有する中間保護構造物と、
前記道路の谷側に設けられた谷側基礎と、
この谷側基礎上に設けられた谷側支持体に支持されると共に、前記山側屋根に連結する谷側屋根と、
この谷側屋根により覆われた前記道路の拡張部分と、
を備える保護構造物の施工方法において、
前記中間保護構造物を構築して前記道路の少なくとも一部を保護し、この後、前記道路の拡張が必要になったら、
前記傾斜面に前記谷側基礎を構築し、この谷側基礎上に設けられた前記谷側支持体と、この谷側支持体により支持されると共に前記山側屋根に連結する前記谷側屋根を構築することを特徴とする保護構造物の施工方法。 An intermediate protection structure having a mountain side support provided on the mountain side of the road on which the valley side forms an inclined surface, and a mountain side roof supported by the mountain side support and covering at least a part of the road ;
A valley- side foundation provided on the valley side of the road ;
Supported by the valley side support provided on the valley side foundation, and connected to the mountain side roof ;
An extension of the road covered by this valley side roof;
In the construction method of the protective structure comprising
If the intermediate protection structure is constructed to protect at least part of the road, after which the road needs to be expanded,
The valley foundation is constructed on the inclined surface, the valley support provided on the valley foundation, and the valley roof supported by the valley support and connected to the mountain roof are constructed. The construction method of the protection structure characterized by doing. 前記中間保護構造物は、前記保護構造物の谷側部分の増設を行っても、補強するための追加工事が不要な強度構造を備えることを特徴とする請求項１記載の保護構造物の施工方法。The construction of the protective structure according to claim 1, wherein the intermediate protective structure has a strength structure that does not require additional work for reinforcement even if the valley side portion of the protective structure is added. Method.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01244003A (en) * 1988-03-22 1989-09-28 Kurosawa Kensetsu Kk Lock-shade and construction thereof
JPH06185021A (en) * 1992-12-18 1994-07-05 Nippon Samikon Kk Foundation structure of road protection shed
JP2000204505A (en) * 1999-01-12 2000-07-25 Kawasaki Steel Corp Widened road and its execution method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01244003A (en) * 1988-03-22 1989-09-28 Kurosawa Kensetsu Kk Lock-shade and construction thereof
JPH06185021A (en) * 1992-12-18 1994-07-05 Nippon Samikon Kk Foundation structure of road protection shed
JP2000204505A (en) * 1999-01-12 2000-07-25 Kawasaki Steel Corp Widened road and its execution method

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