JP3316163B2 - Widening road and its construction method - Google Patents
Widening road and its construction methodInfo
- Publication number
- JP3316163B2 JP3316163B2 JP16745697A JP16745697A JP3316163B2 JP 3316163 B2 JP3316163 B2 JP 3316163B2 JP 16745697 A JP16745697 A JP 16745697A JP 16745697 A JP16745697 A JP 16745697A JP 3316163 B2 JP3316163 B2 JP 3316163B2
- Authority
- JP
- Japan
- Prior art keywords
- road
- pile
- foundation pile
- widened
- foundation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、山間部の斜面に
設けられた既設道路を拡幅した、とくに谷側に向かって
張り出させて拡幅した道路およびその施工方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a road, which is obtained by widening an existing road provided on a slope in a mountainous area, in particular, by expanding the road toward a valley, and a method of constructing the road.
【０００２】例えば、交通量の増加や大型車の通行開放
などに伴って、道路の拡幅が必要になるが、山間部や海
岸部の斜面に設けられた道路では、平地の道路に比較し
て、その拡幅が難しく、とりわけ勾配の強い斜面での拡
幅工事は困難である。For example, roads need to be widened in response to an increase in traffic volume and the opening of large vehicles, but roads provided on mountainous or coastal slopes are more likely than roads on level ground. However, widening is difficult, especially on wide slopes.
【０００３】この斜面における道路の拡幅工法として
は、既設道路の山側背面を切り土した部分に道路を拡幅
する手法や、斜面の谷側に離間して設置した擁壁と斜面
との間に盛り土を行って、この盛り土上に道路を拡幅す
る手法などが、知られている。しかし、前者の手法は、
切り土面が山側斜面に長く連なって斜面が不安定である
上、切り土による自然環境破壊が懸念される。また、後
者の手法は、大量の土砂の供給、運搬を必要とする上、
斜面の勾配がきついところ、あるいは既設道路の谷側に
民家や川、海があるところでは、その施工が事実上不可
能である。[0003] As a method of widening the road on this slope, there are a method of widening the road at a portion where the rear side of the existing road is cut off on the mountain side, and a method of embankment between the retaining wall and the slope installed at a distance from the slope valley side. And a method of widening a road on the embankment by using the method is known. However, the former approach,
The cut surface is long and continuous with the mountain side slope, making the slope unstable, and there is a concern that the cut environment may destroy the natural environment. In addition, the latter method requires a large amount of sediment supply and transportation,
Where there is a steep slope, or where there is a private house, river, or sea on the valley side of the existing road, construction is virtually impossible.
【０００４】[0004]
【従来の技術】上記問題を解消する技術として、特公昭
59−36041 号公報には、既設道路の拡幅側端部に打設し
た支持杭にて、既設道路を幅方向に跨がって道路拡幅側
（谷側）に延びる張出し桁を、その中間位置で支える一
方、張出し桁の山側端部に反力用プレストレスグランド
アンカーを設け、張出し桁上に床版を載置する、拡幅道
路の構造が提案されている。また、特公平２−37441 号
公報には、同様の反力用プレストレスグランドアンカー
を用いた、張出し式の拡幅道路の施工方法が開示されて
いる。2. Description of the Related Art As a technique for solving the above-mentioned problems, Japanese Patent Publication No.
No. 59-36041 discloses that an overhang girder extending across the existing road in the width direction and extending toward the road widening side (valley side) is supported by a support pile which is cast at the widening side end of the existing road. On the other hand, a widened road structure has been proposed in which a prestressed ground anchor for reaction force is provided at the mountain side end of the overhang girder, and a floor slab is placed on the overhang girder. Further, Japanese Patent Publication No. 2-37441 discloses a method of constructing an overhanging widened road using a similar prestressed ground anchor for reaction force.
【０００５】これらの技術によれば、斜面の山側を切り
土する必要はなく、かつ谷側の盛り土も不要であり、し
かも谷側の環境に左右されない施工を実現することがで
きる、利点がある。[0005] According to these techniques, there is an advantage that it is not necessary to cut the mountain side of the slope, the embankment on the valley side is not required, and construction that is not affected by the environment of the valley side can be realized. .
【０００６】[0006]
【発明が解決しようとする課題】上記の従来技術におけ
る、道路拡幅部分の床版を支持する張出し桁は、その中
間位置を支持杭で支える一方、張出し部分に加わる荷重
に対抗する反力を山側端部に設けたアンカーにて付与す
る構造である。In the above-mentioned prior art, the overhanging girder supporting the floor slab in the widened portion of the road is supported at an intermediate position by a support pile, while the reaction force against the load applied to the overhanging portion is increased on the mountain side. This is a structure provided by an anchor provided at the end.
【０００７】ところで、拡幅後の道路には、張出し部分
における垂直荷重のほか、例えば地震による水平方向の
荷重に代表される、様々な向きからの荷重を考慮しなく
てはならず、反力アンカーの作用では対処し切れないこ
とが少なくない。すなわち、反力アンカーは水平方向の
荷重に対する抵抗力を期待することができないから、地
震などに対する道路強度が、支持杭のみでは不足する場
合が想定される。また、山側端部に加わる垂直荷重に対
しては、アンカーでは支持することができない。これ
は、山側端部の道路基盤が浸食された場合に、とりわけ
問題となる。さらに、反力アンカーは、その機能を維持
するために、定期的に緩みを締めつける必要があり、メ
ンテナンスは不可欠であること、そして反力アンカーの
施工には専用のアンカー打設機が必要であり、杭打機と
合わせて、２種の重機が必要になること、から施工性お
よび経済性の点で不利である。On the road after widening, it is necessary to consider not only the vertical load at the overhang portion but also loads from various directions, for example, a horizontal load due to an earthquake. Often, the action cannot cope. That is, since the reaction force anchor cannot expect a resistance force against a load in the horizontal direction, it is assumed that the road strength against an earthquake or the like is insufficient with only the support pile. Further, the anchor cannot support the vertical load applied to the mountain side end. This is particularly problematic when the road base at the mountainside is eroded. In addition, reaction force anchors need to be regularly tightened to maintain their function, maintenance is indispensable, and installation of reaction force anchors requires a dedicated anchor placement machine However, two types of heavy equipment are required in addition to the pile driving machine, which is disadvantageous in terms of workability and economy.
【０００８】そこで、この発明は、拡幅後の道路構造が
十分な強度を有し、また施工や施工後のメンテナンスに
かかるコストの低い、新規な拡幅道路構造を提供すると
ともに、この道路の有利な施工方法について提案するこ
とを、目的とする。Accordingly, the present invention provides a new widened road structure which has sufficient strength in the road structure after widening and has low costs for construction and post-construction maintenance. The purpose is to propose a construction method.
【０００９】[0009]
【課題を解決するための手段】この発明は、斜面に既設
された道路を、斜面の谷側に拡幅した道路であって、既
設道路の山側端および谷側端に、それぞれ道路の延長方
向に所定間隔で打設した、複数の基礎杭の頭部を横桁お
よび縦桁で結合した基礎桁を設置し、該基礎桁は、既設
道路の谷側端外側へ向けて水平に延びる張出し桁を有
し、該張出し桁上に床版を載置してなる拡幅道路であ
る。SUMMARY OF THE INVENTION The present invention is directed to a road in which an existing road on a slope is widened to a valley side of the slope. was pouring at predetermined intervals, crossbeams you the head of the multiple of the foundation pile
And a foundation girder joined by stringers, the foundation girder having an overhanging girder extending horizontally toward the outside of the valley end of the existing road, and a widening having a floor slab placed on the overhanging girder. Road.
【００１０】この拡幅道路は、さらに基礎杭と桁との間
に、基礎杭の打設位置の誤差を吸収する、基礎杭頭部よ
りも大径のトッププレートをそなえることも可能であ
る。[0010] The widened road may further include a top plate between the foundation pile and the girder, the top plate having a diameter larger than that of the foundation pile head for absorbing an error in the setting position of the foundation pile.
【００１１】ここで、基礎杭の頭部および基礎桁が耐候
性鋼板であること、基礎杭は鋼管の内側にグラウト材を
充填したもの、ドリル杭あるいはＨ型鋼であること、と
りわけ杭の外周にジベルや鉄筋、あるいは多数の穴を有
するものが適合する。Here, the head and girder of the foundation pile are made of weather-resistant steel plates, the foundation pile is a steel pipe filled with grout material inside, a drill pile or H-shaped steel, and especially the outer periphery of the pile. Dowels, rebars, or those with multiple holes are suitable.
【００１２】さらに、基礎杭は、鉄筋コンクリートであ
ること、とりわけ周面に杭の径方向外側に延びて地盤に
固定されたアンカーボルトを有するか、または周面が部
分的に杭の径方向外側に拡がる突出部を有するものが、
有利に適合する。Further, the foundation pile is made of reinforced concrete, and in particular has anchor bolts extending radially outward of the pile on the peripheral surface and fixed to the ground, or the peripheral surface partially extends radially outward of the pile. What has a protruding part,
Advantageously fit.
【００１３】また、上記の拡幅道路には、斜面に既設さ
れた道路を、斜面の谷側に拡幅するに当たり、既設道路
の山側端および谷側端のそれぞれに、複数の基礎杭を道
路の延長方向に所定間隔で打設し、これら基礎杭の頭部
を横桁および縦桁で結合するとともに、既設道路の谷側
端から桁を谷側外側へ向けて水平に延ばして基礎桁を設
置し、該基礎桁の既設道路谷側に延びる張出し桁上に、
床版を載置することを特徴とする拡幅道路の施工方法、
を適用できる。[0013] Further, when widening an existing road on a slope to the valley side of the slope, a plurality of foundation piles are attached to each of the mountain side end and the valley side end of the existing road. At the same time, the heads of these foundation piles are joined by horizontal and vertical girders , and the girders are extended horizontally from the valley end of the existing road toward the valley side to install the foundation girder. , On an overhanging girder extending to the existing road valley side of the foundation girder,
Construction method of widening road characterized by placing floor slab,
Can be applied.
【００１４】ここで、上記の施工方法において、基礎杭
の打設位置に誤差がある場合に、基礎杭の頭部を桁で結
合するに際し、基礎杭と桁との間に、基礎杭頭部よりも
大径のトッププレートを介在させることによって、基礎
杭の打設位置の誤差を吸収することが可能である。この
場合、杭頭部に予めトッププレートが溶接された基礎杭
を打設し、該トッププレート上に桁を結合することによ
って、施工を簡便化することができる。In the above construction method, when there is an error in the setting position of the foundation pile, when connecting the head of the foundation pile with the girder, the head of the foundation pile is inserted between the foundation pile and the girder. By interposing a top plate having a diameter larger than that, it is possible to absorb an error in the setting position of the foundation pile. In this case, the construction can be simplified by placing a foundation pile to which the top plate is welded in advance on the pile head and connecting the girder to the top plate.
【００１５】[0015]
【発明の実施の形態】さて、この発明の拡幅道路の構造
について、図面を参照して詳しく述べる。この拡幅道路
は、図１に示すように、斜面に設けられた既設道路１の
谷側に、水平方向に張出した拡幅道路２を新設したもの
である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of a widened road according to the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, this widened road has a newly widened road 2 extending horizontally in the valley side of an existing road 1 provided on a slope.
【００１６】具体的には、既設道路１の山側端に、既設
道路１の延長方向に所定間隔で打設した複数の基礎杭
３、および同様に既設道路１の谷側端に、既設道路１の
延長方向に所定間隔で打設した複数の基礎杭４、の頭部
を横桁および縦桁で結合した基礎桁５における、張出し
桁６上に床版７を載置し、さらに床版７上に舗装８を施
して成る。More specifically, a plurality of foundation piles 3 cast at predetermined intervals in the extension direction of the existing road 1 at the mountain side end of the existing road 1, and similarly, the existing road 1 is mounted at the valley side end of the existing road 1. A floor slab 7 is placed on an overhanging girder 6 of a foundation girder 5 in which the heads of a plurality of foundation pilings 4, which are cast at predetermined intervals in the extension direction of the girder, are joined by horizontal and vertical girder. It has a pavement 8 on it.
【００１７】すなわち、基礎桁５は、図２に示すよう
に、横桁９ａ，９ｂおよび縦桁10ａ，10ｂの結合にな
り、その内、基礎杭４から谷側へ水平方向に延びる横桁
９ａおよびこの横桁９ａの基端同士、そして自由端同士
をそれぞれつなぐ縦桁10ａおよび10ｂから張出し桁６を
構成し、この張出し桁６における縦桁10ａおよび10ｂ間
に載置した、床版７上に舗装８を設けたものである。ち
なみに、床版７には、図２に示す、鋼板上に予め鉄筋が
形成されたグレーチング床版を使用することが、施工上
好ましく、そして基礎杭の頭部を耐候性鋼板で構成する
ことが、耐久性上好ましい。That is, as shown in FIG. 2, the base girder 5 is a combination of the horizontal girder 9a, 9b and the vertical girder 10a, 10b, and the horizontal girder 9a extending from the foundation pile 4 to the valley side in the horizontal direction. And an overhanging beam 6 composed of vertical beams 10a and 10b connecting the base ends of the horizontal beams 9a and the free ends thereof, respectively, on the floor slab 7 placed between the vertical beams 10a and 10b of the overhanging beams 6. Is provided with a pavement 8. Incidentally, it is preferable from the viewpoint of construction that the floor slab 7 is a grating slab in which a reinforcing bar is formed in advance on a steel plate as shown in FIG. 2, and the head of the foundation pile is made of a weather-resistant steel plate. It is preferable in terms of durability.
【００１８】また、図３に示すように、基礎杭３または
４の打設位置に誤差がある場合は、基礎杭３または４
に、基礎杭頭部よりも大径のトッププレート11を、リブ
12で補強して固着し、このトッププレート11上に基礎桁
５を載せれば、強度低下をもたらすことなしに、基礎杭
の打設位置の誤差を吸収することができる。As shown in FIG. 3, when there is an error in the setting position of the foundation pile 3 or 4,
The top plate 11, which is larger in diameter than the foundation pile head,
If the foundation girder 5 is placed on the top plate 11 and reinforced with the support 12, errors in the placement position of the foundation pile can be absorbed without reducing the strength.
【００１９】なお、基礎杭３および４には、鋼管の少な
くとも外側にグラウト材を充填したものを使用でき、と
りわけ図４(a) および(b) に示す、鋼管13の外周にジベ
ル14や鉄筋15を固着したものは、杭の引き抜き抵抗力を
増加することができる。同様に、同図(c) に示す、鋼管
13に多数の穴16を設けたものでは、穴16からグラウト材
が鋼管内側に流れ込むことによって、杭の引き抜き抵抗
力を増加できる。その他、基礎杭を同図(d) に示すＨ型
鋼として杭の表面積を増大することによっても、杭の引
き抜き抵抗力は増大する。一方、杭の打設を簡便に行う
ために、同図(e) に示す、ドリル杭を使用することも可
能である。いずれも、鋼管の場合と同様、ジベルや鉄筋
あるいは穴を適用することができる。The foundation piles 3 and 4 can be formed by filling at least the outside of a steel pipe with a grout material. In particular, as shown in FIGS. The fixed 15 can increase the pull-out resistance of the pile. Similarly, the steel pipe shown in Fig.
In the case where a large number of holes 16 are provided in 13, the pullout resistance of the pile can be increased by the grout material flowing into the inside of the steel pipe from the holes 16. In addition, the pull-out resistance of the pile is also increased by increasing the surface area of the pile by using an H-shaped steel as shown in FIG. On the other hand, a drill pile shown in the same figure (e) can be used to easily drive the pile. In any case, as in the case of the steel pipe, a dowel, a reinforcing bar, or a hole can be applied.
【００２０】さらに、基礎杭３および４に、鉄筋コンク
リートを用いることも可能である。すなわち、図５に示
すように、所定位置に掘削した削孔17内に、現場で溶接
施工した鉄筋かご18を配置したのち、削孔17内にコンク
リート19を充填することによって作製した、鉄筋コンク
リート製杭20を用いることができる。この基礎杭は、現
場で作製が容易であるから、長尺の鋼管などの搬入が難
しい現場に有利に適合する。Furthermore, it is also possible to use reinforced concrete for the foundation piles 3 and 4. That is, as shown in FIG. 5, a reinforced concrete cage 18 was prepared by placing a reinforced cage 18 welded on site in a borehole 17 excavated at a predetermined position, and then filling the hole 19 with concrete 19. Piles 20 can be used. Since this foundation pile is easy to produce on site, it is advantageously adapted to a site where it is difficult to carry in a long steel pipe or the like.
【００２１】とくに、施工場所の地盤が極めて強固であ
ったり、長尺の削岩機の使用が制限される場合には、図
６に示すように、図５の基礎杭に対比して、削孔17を浅
くする一方、その容積を増加させて施工した、鉄筋コン
クリート製杭21とすることも可能である。In particular, when the ground at the construction site is extremely strong or when the use of a long rock drill is restricted, as shown in FIG. It is also possible to make the reinforced concrete pile 21 constructed by increasing the volume while making the hole 17 shallow.
【００２２】ここで、図６に示す鉄筋コンクリート製杭
21は、その設置地盤が強固である場合は十分な引き抜き
抵抗を有するが、引き抜き抵抗力をより増強するため
に、図７〜９に示す態様で杭を作製することが好まし
い。すなわち、図７に示す鉄筋コンクリート製杭21は、
削孔の周面に予め複数のアンカーボルト22を打設したの
ち、鉄筋かごを配置してコンクリートを充填して成る。
従って、杭の内部から径方向外側に突出して延びるアン
カーボルト22が地盤内に差し込まれることになり、杭の
引き抜き抵抗力が増加するのである。Here, a reinforced concrete pile shown in FIG.
21 has sufficient pull-out resistance when its installation ground is strong, but in order to further enhance the pull-out resistance, it is preferable to make a pile in the manner shown in FIGS. That is, the reinforced concrete pile 21 shown in FIG.
After drilling a plurality of anchor bolts 22 in advance on the peripheral surface of the drilled hole, a steel cage is placed and concrete is filled.
Therefore, the anchor bolt 22 protruding radially outward from the inside of the pile is inserted into the ground, and the pull-out resistance of the pile increases.
【００２３】次に、図８に示す鉄筋コンクリート製杭21
は、削孔の底面付近を径方向に拡大してから、この削孔
内に鉄筋かごを配置してコンクリートを充填して成る。
従って、コンクリートの充填後に杭底部が径方向に拡大
した突出部23が形成されるため、杭の引き抜き抵抗力が
増加する。ちなみに、削孔の底面付近を径方向に拡大す
るには、人力掘削または発破の各手法を用いることがで
きる。同様に、図９に示す鉄筋コンクリート製杭21は、
上記突出部23を底部以外にも、杭の軸方向に間隔を置い
て２か所に設けた例である。なお、これら突出部23が螺
旋状に連続していてもよい。Next, a reinforced concrete pile 21 shown in FIG.
Is formed by enlarging the vicinity of the bottom surface of a drill hole in the radial direction, and then placing a steel cage in the drill hole and filling concrete.
Therefore, the protrusion 23 in which the pile bottom is enlarged in the radial direction after the concrete is filled is formed, and the pull-out resistance of the pile is increased. Incidentally, in order to enlarge the vicinity of the bottom surface of the hole in the radial direction, each technique of human excavation or blasting can be used. Similarly, the reinforced concrete pile 21 shown in FIG.
This is an example in which the protrusions 23 are provided at two places apart from the bottom at intervals in the axial direction of the pile. Note that these protrusions 23 may be spirally continuous.
【００２４】一方、上述した鋼管を基礎杭とする場合に
も、図８と同様に、杭底部に径方向に拡大した突出部23
を設けることが引き抜き抵抗力を増加するのに有効であ
る。すなわち、図10に示すように、削孔の径を拡大した
上で、そこへ末端にリング24を固着した鋼管13を挿入
し、鋼管13の周囲にコンクリートを充填すればよい。さ
らに、図11に示すように、鋼管13の末端に切り込み25を
設けておき、該鋼管13を削孔内に挿入したときに、鋼管
末端部分を切り込み25の介在下で外側に拡張させること
によって、鋼管底部に突出部を形成することも可能であ
る。On the other hand, when the above-mentioned steel pipe is used as a foundation pile, similarly to FIG.
Is effective to increase the pull-out resistance. That is, as shown in FIG. 10, after the diameter of the hole is enlarged, the steel pipe 13 having the ring 24 fixed to the end thereof is inserted therein, and the concrete around the steel pipe 13 may be filled with concrete. Further, as shown in FIG. 11, a notch 25 is provided at the end of the steel pipe 13, and when the steel pipe 13 is inserted into the drilled hole, the steel pipe end is expanded outward with the intervention of the cut 25. It is also possible to form a protrusion on the bottom of the steel pipe.
【００２５】次に、拡幅道路の施工方法について、詳し
く述べる。まず、既設道路１の山側端および谷側端のそ
れぞれに、基礎杭を打設するための孔を掘削し、この孔
に、例えば鋼管を建て込んだのち、図12に示すように、
鋼管13内およびその外側の孔26内に、グラウト材27を流
し込み、基礎杭３および４の打設を完了する。また、基
礎杭を鉄筋コンクリート杭とする場合は、削孔内に現場
で溶接組み立てした鉄筋かごを配置し、次いで削孔にコ
ンクリートを充填すればよい。Next, a method for constructing a widened road will be described in detail. First, a hole for driving a foundation pile is excavated at each of the mountain side end and the valley side end of the existing road 1, and for example, a steel pipe is erected in this hole, and as shown in FIG.
The grout material 27 is poured into the steel pipe 13 and the hole 26 outside the steel pipe 13 to complete the placing of the foundation piles 3 and 4. When a reinforced concrete pile is used as the foundation pile, a reinforced cage that is welded and assembled at the site is arranged in the drilled hole, and then the drilled hole is filled with concrete.
【００２６】かくして得られる基礎杭は、拡幅道路に加
わる垂直荷重による、引き抜き力に対する十分な抗力が
付与されるのは勿論、既設道路に加わる垂直荷重によ
る、押し込み力に対しても十分な抗力が得られ、さらに
地震に伴う水平方向の力に対しても十分な抗力をそなえ
るものとなる。The foundation pile thus obtained not only has a sufficient resistance against the pull-out force due to the vertical load applied to the widened road, but also has a sufficient resistance against the pushing force due to the vertical load applied to the existing road. It is possible to obtain sufficient resistance to horizontal force due to the earthquake.
【００２７】次いで、これら基礎杭の頭部を横桁９ａ，
９ｂおよび縦桁10ａ，10ｂで結合して基礎桁５を形成す
る。ここでは、横桁および縦桁をある程度のユニットに
結合したものを現場に搬入して、基礎桁５の組み立てを
行うのが、効率的である。その後、基礎桁５の張出し桁
６上に、好ましくは上記グレーチング床版７を載置して
から、床版７上に舗装８を施して、拡幅道路２が完成す
る。Next, the heads of these foundation piles are connected to the cross beams 9a,
9b and the stringers 10a, 10b combine to form the base beam 5. Here, it is efficient to carry the thing which combined the horizontal girder and the vertical girder to a certain unit to the site, and to assemble the base girder 5. After that, preferably, the above-mentioned grating floor slab 7 is placed on the overhanging slab 6 of the foundation girder 5 and then the pavement 8 is applied on the floor slab 7 to complete the widened road 2.
【００２８】ここで、基礎杭３および４の打設は、図12
に示したように、既設道路１の路面を再利用する場合
は、基礎杭３および４の頭部を既設道路１の路面下に位
置させる。この場合は、既設道路１において杭および桁
を配置する場所のみを掘削し、桁の設置が完了したの
ち、適宜に埋め戻して再舗装を行えばよい。Here, the placement of the foundation piles 3 and 4 is shown in FIG.
As shown in (2), when the road surface of the existing road 1 is reused, the heads of the foundation piles 3 and 4 are located below the road surface of the existing road 1. In this case, only the place where the pile and the girder are arranged on the existing road 1 is excavated, and after the installation of the girder is completed, it may be backfilled as appropriate and repaved.
【００２９】一方、図13に示すように、既設道路１につ
いても拡幅道路２の舗装とともに新たに舗装してしまう
場合は、基礎杭３および４の頭部を既設道路１の路面上
方に位置させ、既設道路１の上に、新設道路１′を施工
し、この新設道路１′の谷側に拡幅道路２が形成され、
既設道路１の掘削工事を削減できる。この場合は、新設
道路１′も拡幅道路２と同様の構造となる。On the other hand, as shown in FIG. 13, when the existing road 1 is to be newly paved together with the pavement of the widened road 2, the heads of the foundation piles 3 and 4 are positioned above the road surface of the existing road 1. A new road 1 'is constructed on the existing road 1, and a widened road 2 is formed on the valley side of the new road 1'.
Excavation work on the existing road 1 can be reduced. In this case, the new road 1 ′ has the same structure as the widened road 2.
【００３０】また、上記の施工方法において、基礎杭３
または４の打設位置に誤差がある場合は、基礎杭３また
は４の頭部を基礎桁で格子状に結合するに先立ち、図３
に示したように、基礎杭頭部に、この頭部よりも大径の
トッププレート11をリブ12の補強の下に溶接にて固着
し、その後トッププレート11上に基礎桁５を載せれば、
基礎杭の打設位置の誤差による影響を受けることなく、
基礎桁５の設置が可能となる。In the above construction method, the foundation pile 3
Or, if there is an error in the setting position of 4, prior to joining the heads of the foundation piles 3 or 4 in a grid pattern with the foundation girders, FIG.
As shown in above, if the top plate 11 having a diameter larger than that of the head is fixed to the foundation pile head by welding under the reinforcement of the ribs 12, and then the foundation girder 5 is placed on the top plate 11. ,
Without being affected by errors in the placement of the foundation pile,
The installation of the foundation girder 5 becomes possible.
【００３１】なお、トッププレート11を基礎杭頭部に溶
接する施工は、作業員に狭い空間での上向き姿勢を強い
るため、溶接部の品質管理上、非常に難しい作業にな
る。そこで、基礎杭の頭部に予めトッププレートが溶接
された基礎杭を打設し、該トッププレート上に桁を結合
することによって、施工を簡便化することができる。ま
た、図３に示すように、予めトッププレート11を取り付
けた鋼管ブロック11ａを杭頭部に溶接してもよい。この
とき、溶接部Ｙ1 およびＹ2 に、予め開先加工を施して
おくことが好ましい。The work of welding the top plate 11 to the head of the foundation pile is an extremely difficult operation in terms of quality control of the welded part because the operator is forced to face upward in a narrow space. Therefore, the construction can be simplified by placing the foundation pile with the top plate welded in advance to the head of the foundation pile and connecting the girder to the top plate. Further, as shown in FIG. 3, a steel pipe block 11a to which a top plate 11 is attached in advance may be welded to a pile head. In this case, the weld Y 1 and Y 2, it is preferable to preliminarily subjected to beveling.
【００３２】[0032]
【発明の効果】この発明によれば、拡幅道路を支える桁
を支持する基礎杭、とりわけ既設道路の山側端に打設し
た基礎杭が、押し込み方向、引き抜き方向そして水平方
向に対して十分な抗力を有するため、拡幅道路に対して
十分な強度を与えることができる。また、従来のアンカ
ーによる構造のような，施工後のメンテナンスは不要で
ある。According to the present invention, a foundation pile for supporting a girder supporting a widened road, particularly a foundation pile cast at the mountain side end of an existing road, has sufficient drag in the pushing direction, the pulling direction and the horizontal direction. Therefore, sufficient strength can be given to the widened road. Further, maintenance after the construction as in the conventional structure using the anchor is unnecessary.
【００３３】さらに、この発明の施工方法は、施工に使
用する重機が、従来のアンカー式の拡幅道路に比較して
少なくてすみ、低いコストでの施工が可能である。Further, according to the construction method of the present invention, the number of heavy machines used for the construction is smaller than that of the conventional anchor-type widened road, and the construction can be performed at low cost.
【図１】この発明に従う拡幅道路の構造を示す模式図で
ある。FIG. 1 is a schematic diagram showing the structure of a widened road according to the present invention.
【図２】この発明に従う拡幅道路の主要構造を示す図で
ある。FIG. 2 is a diagram showing a main structure of a widened road according to the present invention.
【図３】基礎杭と桁との結合構造を示す図である。FIG. 3 is a diagram showing a connection structure between a foundation pile and a girder.
【図４】基礎杭の各種構造を示す図である。FIG. 4 is a view showing various structures of a foundation pile.
【図５】基礎杭の別の構造を示す図である。FIG. 5 is a view showing another structure of the foundation pile.
【図６】基礎杭のさらに別の構造を示す図である。FIG. 6 is a view showing still another structure of the foundation pile.
【図７】鉄筋コンクリート杭の構造を示す図である。FIG. 7 is a view showing a structure of a reinforced concrete pile.
【図８】鉄筋コンクリート杭の構造を示す図である。FIG. 8 is a view showing a structure of a reinforced concrete pile.
【図９】鉄筋コンクリート杭の構造を示す図である。FIG. 9 is a view showing the structure of a reinforced concrete pile.
【図１０】鋼管杭の構造を示す図である。FIG. 10 is a view showing a structure of a steel pipe pile.
【図１１】鋼管杭の構造を示す図である。FIG. 11 is a view showing a structure of a steel pipe pile.
【図１２】この発明に従う拡幅道路の基礎杭の施工を説
明する図である。FIG. 12 is a diagram illustrating construction of a foundation pile of a widened road according to the present invention.
【図１３】拡幅道路の別の設置形態を示す図である。FIG. 13 is a view showing another installation form of a widened road.
１ 既設道路 ２ 拡幅道路 ３ 基礎杭 ４ 基礎杭 ５ 基礎桁 ６ 張出し桁 ７ 床版 ８ 舗装 ９ａ 横桁 ９ｂ 横桁 10ａ 縦桁 10ｂ 縦桁 DESCRIPTION OF SYMBOLS 1 Existing road 2 Widening road 3 Foundation pile 4 Foundation pile 5 Foundation girder 6 Overhang girder 7 Floor slab 8 Pavement 9a Horizontal girder 9b Horizontal girder 10a Vertical girder 10b Vertical girder
───────────────────────────────────────────────────── フロントページの続き (72)発明者 塩田 啓介 東京都千代田区内幸町２丁目２番３号 川崎製鉄株式会社内 (56)参考文献 特開 平８−232260（ＪＰ，Ａ) 特開 平６−287945（ＪＰ，Ａ) 特開 平２−125016（ＪＰ，Ａ) 特開 昭63−236815（ＪＰ，Ａ) 特開 平３−36315（ＪＰ，Ａ) 特開 平７−166544（ＪＰ，Ａ) 特開 昭60−30715（ＪＰ，Ａ) 実開 平３−99001（ＪＰ，Ｕ) 特公 昭62−1048（ＪＰ，Ｂ２) ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Keisuke Shioda 2-3-2 Uchisaiwaicho, Chiyoda-ku, Tokyo Inside Kawasaki Steel Corporation (56) References JP-A-8-232260 (JP, A) JP-A-6 JP-A-287945 (JP, A) JP-A-2-125016 (JP, A) JP-A-63-236815 (JP, A) JP-A-3-36315 (JP, A) JP-A-7-166544 (JP, A) JP-A-60-30715 (JP, A) JP-A-3-99001 (JP, U) JP-B-62-1048 (JP, B2)
Claims (15)
拡幅した道路であって、既設道路の山側端および谷側端
に、それぞれ道路の延長方向に所定間隔で打設した、複
数の基礎杭の頭部を横桁および縦桁で結合した基礎桁を
設置し、該基礎桁は、既設道路の谷側端外側へ向けて水
平に延びる張出し桁を有し、該張出し桁上に床版を載置
してなる拡幅道路。1. A road in which an existing road is widened to a valley side of a slope, the road being extended at predetermined intervals in the direction of extension of the road at the mountain side end and the valley side end of the existing road. of the head of the foundation pile crossbeam and basic digits bound installed with stringers, the basic digit has an overhanging girder extending horizontally toward the valley end outside of the existing road, on該張out digit Widening road with floor slabs.
らに基礎杭と桁との間に、基礎杭の打設位置の誤差を吸
収する、基礎杭頭部よりも大径のトッププレートをそな
える拡幅道路。2. The widened road according to claim 1, further comprising a top plate between the foundation pile and the girder, the top plate having a diameter larger than the head of the foundation pile, which absorbs an error in a setting position of the foundation pile. Widening road.
１または２に記載の拡幅道路。3. The widened road according to claim 1, wherein the head of the foundation pile is made of a weather-resistant steel plate.
ウト材を充填したものである請求項１、２または３に記
載の拡幅道路。4. The widened road according to claim 1, wherein the foundation pile is formed by filling at least the outside of a steel pipe with a grout material.
または３に記載の拡幅道路。5. The pile according to claim 1, wherein the foundation pile is a drill pile.
Or the widened road described in 3.
たは３に記載の拡幅道路。6. The widened road according to claim 1, wherein the foundation pile is H-shaped steel.
５または６に記載の拡幅道路。7. The pile having a dowel or a reinforcing bar on the pile.
The widened road according to 5 or 6.
たは６に記載の拡幅道路。8. The widened road according to claim 4, wherein the pile has a large number of holes.
項１、２または３に記載の拡幅道路。9. The widened road according to claim 1, wherein the foundation pile is reinforced concrete.
て地盤に固定されたアンカーボルトを有する請求項９に
記載の拡幅道路。10. The widened road according to claim 9, further comprising an anchor bolt extending radially outward of the pile and fixed to the ground on a peripheral surface of the foundation pile.
側に拡がる突出部を有する請求項９に記載の拡幅道路。11. The widened road according to claim 9, wherein the peripheral surface of the foundation pile has a projecting portion that partially extends radially outward of the pile.
たは２に記載の拡幅道路。12. The widened road according to claim 1, wherein the foundation girder is a weather-resistant steel plate.
に拡幅するに当たり、既設道路の山側端および谷側端の
それぞれに、複数の基礎杭を道路の延長方向に所定間隔
で打設し、これら基礎杭の頭部を横桁および縦桁で結合
するとともに、既設道路の谷側端から桁を谷側外側へ向
けて水平に延ばして基礎桁を設置し、該基礎桁の既設道
路谷側に延びる張出し桁上に、床版を載置することを特
徴とする拡幅道路の施工方法。13. When widening an existing road on a slope to the valley side of the slope, a plurality of foundation piles are cast at predetermined intervals in the direction of extension of the road at each of the mountain side end and the valley side end of the existing road. and, with coupling head of the foundation pile with crossbeam and stringers, the basic digit placed to extend horizontally toward the valley end of the existing road digits to the valley outside, the basic digit of the existing road A method for constructing a widened road, comprising placing a floor slab on an overhanging girder extending to the valley side.
て、基礎杭の打設位置に誤差がある場合に、基礎杭の頭
部を桁で結合するに際し、基礎杭と桁との間に、基礎杭
頭部よりも大径のトッププレートを介在させて基礎杭の
打設位置の誤差を吸収することを特徴とする拡幅道路の
施工方法。14. The construction method according to claim 13, wherein, when there is an error in the setting position of the foundation pile, when connecting the head of the foundation pile with the girder, the foundation is placed between the foundation pile and the girder. A widening road construction method characterized by absorbing an error in the setting position of a foundation pile by interposing a top plate having a diameter larger than that of a pile head.
れた基礎杭を打設し、該トッププレート上に桁を結合す
る請求項１４に記載の拡幅道路の施工方法。15. The method for constructing a widened road according to claim 14, wherein a foundation pile to which a top plate is welded in advance is poured into a pile head, and a girder is connected to the top plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16745697A JP3316163B2 (en) | 1996-12-11 | 1997-06-24 | Widening road and its construction method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33069496 | 1996-12-11 | ||
| JP8-330694 | 1996-12-11 | ||
| JP16745697A JP3316163B2 (en) | 1996-12-11 | 1997-06-24 | Widening road and its construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10227002A JPH10227002A (en) | 1998-08-25 |
| JP3316163B2 true JP3316163B2 (en) | 2002-08-19 |
Family
ID=26491498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16745697A Expired - Fee Related JP3316163B2 (en) | 1996-12-11 | 1997-06-24 | Widening road and its construction method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3316163B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100977482B1 (en) | 2010-02-16 | 2010-08-23 | 우경건설 주식회사 | Pedestrian bridges where installation is easy for existence road slope |
| KR101090400B1 (en) * | 2011-02-28 | 2011-12-06 | 주식회사 흥화 | Construction method of road for extending breadth of road on slope face |
| JP2012184580A (en) * | 2011-03-04 | 2012-09-27 | Hayashi Bussan Hatsumei Kenkyusho:Kk | Road structure |
| CN102146676A (en) * | 2011-03-21 | 2011-08-10 | 中铁二院工程集团有限责任公司 | High-steep side slope subgrade structure for mountain area |
| JP6059585B2 (en) * | 2013-04-04 | 2017-01-11 | ヒロセ株式会社 | Frame structure of support pile and horizontal truss and construction method of frame structure |
| WO2021090439A1 (en) * | 2019-11-07 | 2021-05-14 | Ｊｆｅシビル株式会社 | Road structure, formwork jig, and road structure construction method |
| CN111254772A (en) * | 2020-03-31 | 2020-06-09 | 浙江交工集团股份有限公司 | Large cantilever structure suitable for widening old roads of cliff road sections and construction method |
| CN112376420A (en) * | 2020-09-29 | 2021-02-19 | 福州市规划设计研究院 | Construction method for paving sidewalk on lake |
| CN113638276B (en) * | 2021-08-16 | 2022-12-16 | 内蒙古大学 | Road pile foundation, self-feeding type deviation rectifying method and device and pile foundation system |
| CN115262566A (en) * | 2022-07-19 | 2022-11-01 | 中国电建集团华东勘测设计研究院有限公司 | High-steep and strong-unloading overwater slope excavation slag collecting platform and construction method thereof |
-
1997
- 1997-06-24 JP JP16745697A patent/JP3316163B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10227002A (en) | 1998-08-25 |
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