JP2769778B2 - Road construction method in mountains and hills - Google Patents
Road construction method in mountains and hillsInfo
- Publication number
- JP2769778B2 JP2769778B2 JP6007502A JP750294A JP2769778B2 JP 2769778 B2 JP2769778 B2 JP 2769778B2 JP 6007502 A JP6007502 A JP 6007502A JP 750294 A JP750294 A JP 750294A JP 2769778 B2 JP2769778 B2 JP 2769778B2
- Authority
- JP
- Japan
- Prior art keywords
- floor plate
- upper floor
- side wall
- road
- cut
- 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 - Lifetime
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- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、山岳、丘陵地において
道路を建設する方法において、特に土被りが浅い場合に
安全に効率よく道路を建設する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 method for constructing a road in a mountain or a hill, and particularly to a method for constructing a road safely and efficiently when the cover is shallow.
【０００２】[0002]
【従来の技術】山岳、丘陵地に道路を建設するとき、山
を通る場合にはトンネルとして施工し、谷を越える場合
には橋梁として施工し、そしてその中間部や斜面を通る
場合には切土・盛土による施工が一般に使われている。2. Description of the Related Art When constructing roads in mountains and hills, tunnels are constructed when passing through mountains, bridges are constructed when crossing valleys, and cuts are made when passing through intermediate sections or slopes. Construction using earth and embankment is generally used.
【０００３】このように山岳、丘陵地において図９に示
すように浅い谷を通り、しかも道路面１が谷底より低い
ときには切土による施工が通常であるが、地山の安定勾
配で切土すると長大な切土法面２となってしまうことが
ある。図９の斜線部分は切土部分を示す。As shown in FIG. 9, in a mountain or a hill, when a road passes through a shallow valley and the road surface 1 is lower than the bottom of the valley, cutting is usually performed. It may be a long cut slope 2. The hatched portion in FIG. 9 indicates a cut portion.
【０００４】かかる長大切土法面はその長期安定性・維
持管理の面で問題があるばかりでなく、自然環境保護の
観点からも好ましい方法とはいえない。特に、図９に示
すように両側が長大切土法面となる場合には掘削土量が
多くなりその運搬や処分は工期や工費の面で問題であ
る。[0004] Such a long soil slope is not only a problem in terms of long-term stability and maintenance, but is not a preferable method from the viewpoint of protection of the natural environment. In particular, as shown in FIG. 9, when both sides have long slopes of important soil, the amount of excavated soil becomes large, and transport and disposal thereof are problematic in terms of construction period and construction cost.
【０００５】このような問題に対処する方法としては、
図１０に示すようにトンネル３で施工する方法や、図１
１に示すようにグランドアンカー４を使用して切土法面
２を短くする方法や、図１２に示すように地中連続壁５
や矢板で土留壁を形成し、この土留壁間を開削したの
ち、ボックスカルバート６を配設し、再度埋め戻す方法
などがある。図１２の場合も地中連続壁５や矢板で形成
する土留壁にはグランドアンカー４を施す。[0005] As a method of dealing with such a problem,
As shown in FIG.
As shown in FIG. 1, a method of shortening the cut slope 2 using the ground anchor 4, or the underground continuous wall 5 as shown in FIG.
There is a method in which a retaining wall is formed by using a sheet pile or a sheet pile, a box culvert 6 is disposed after the retaining wall is cut, and a backfill is performed again. Also in the case of FIG. 12, the ground anchor 4 is applied to the underground continuous wall 5 and the earth retaining wall formed by sheet pile.
【０００６】[0006]
【発明が解決しようとする課題】図１０の場合は自然環
境保護という問題は解決されるが、工費が高いばかりで
なく、土被りが浅い場合にはアーチアクションが効果的
に働かないため、技術的にも問題が残る。In the case of FIG. 10, the problem of protecting the natural environment can be solved. However, not only is the construction cost high, but also the arch action does not work effectively when the earth cover is shallow. The problem still remains.
【０００７】図１１の場合はグランドアンカー４をすべ
り抑止工として使うことにより、法面勾配を安定勾配よ
りも急勾配にできるので法面積は小さくなるが、掘削土
量削減の効果は小さい。In the case of FIG. 11, the slope area can be made steeper than the stable slope by using the ground anchor 4 as a slip-preventing work, so that the slope area is reduced, but the effect of reducing the amount of excavated soil is small.
【０００８】図１２の場合は、自然環境保護・掘削土量
の削減の面での問題は解決されるが、地中連続壁とアン
カーが仮設工事となってしまうので工期・工費ともに過
大となる。In the case of FIG. 12, the problems in terms of protecting the natural environment and reducing the amount of excavated soil can be solved. However, since the underground continuous wall and the anchor are temporary works, both the construction period and the construction cost are excessive. .
【０００９】本発明の目的は前記従来例の不都合を解消
し、上床板の施工に高い足場等も不要で、道路空間の掘
削も安全に施工でき、大規模な仮設山留工事を必要とし
ないので工期・工費を過大にすることなく、さらに、切
土掘削を行うのにその掘削量を大幅に削減して、掘削土
の処理を簡易にし、自然環境の保護に寄与し、また、長
大切土法面の維持管理を楽に行える山岳、丘陵地におけ
る道路の建設工法を提供することにある。An object of the present invention is to eliminate the disadvantages of the prior art, eliminate the need for a high scaffold or the like for the construction of the upper floor panel, safely excavate the road space, and eliminate the need for a large-scale temporary construction work. Therefore, without excessively increasing the construction period and construction cost, the amount of cut excavation is greatly reduced, excavated soil is simplified, and natural environment is protected. It is an object of the present invention to provide a road construction method in mountains and hills where the maintenance of soil slopes can be easily performed.
【００１０】[0010]
【課題を解決するための手段】本発明は前記目的を達成
するため、第１に、道路空間として略台形状のボックス
を構築するに先立ち、その台形状のボックスの上床板に
相当する部分まで安定勾配にて切り下げ、この切り下げ
た位置から斜め外向きに連続した側壁を構築し、さら
に、側壁をつなぐ上床板を施工し、このように側壁・上
床板が完成した段階で端部から道路空間断面の掘削をす
ると同時に路床コンクリートを施工すること、または、
この構成に加えて、最後に上床板より上を埋め戻すこと
を要旨とするものである。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention firstly, prior to constructing a substantially trapezoidal box as a road space, up to a portion corresponding to the upper floor plate of the trapezoidal box. Cut down at a stable slope, construct a continuous side wall diagonally outward from this cut down position, further construct an upper floor plate connecting the side walls, and at the stage where the side wall and upper floor plate are completed in this way from the end, road space Excavation of the cross section and construction of subgrade concrete at the same time, or
In addition to this configuration, the gist of the present invention is to fill back the upper floor plate.
【００１１】[0011]
【作用】請求項１記載の本発明によれば、側壁は土圧を
受ける部材であり、これを傾斜させることにより、それ
自体の根入れ深さを低減でき、また、上床板の幅は短く
てすみ、座屈破壊を起こしにくいものとなり、さらに、
上床板の幅が短いので安定勾配にて切り下げる際の掘削
幅もすくなく、切土法面も小さくなる。According to the first aspect of the present invention, the side wall is a member that receives earth pressure. By inclining the side wall, it is possible to reduce the depth of embedding itself, and the width of the upper floor plate is reduced. It is hard to cause buckling breakage,
Since the width of the upper floor is short, the excavation width when cutting down at a stable slope is also small, and the cut slope becomes small.
【００１２】そして、側壁と上床板ができあがったとこ
ろで、その下部の道路空間断面となる部分の掘削を行う
が、これは土圧を支えるシェル構造がすでにできあがっ
てからの掘削なので施工は極めて安全に行うことができ
る。[0012] When the side wall and the upper floor plate are completed, the lower portion of the road space section is excavated. This is excavation after the shell structure for supporting the earth pressure has already been completed. It can be carried out.
【００１３】請求項２記載の本発明によれば、前記作用
に加えて、埋め戻すことによりトンネルとしての施工と
なるものであるが、この埋め戻しには第１段階で掘削し
た土砂を使用することも可能である。According to the second aspect of the present invention, in addition to the above operation, the tunnel is constructed by backfilling, and the backfill uses the earth and sand excavated in the first stage. It is also possible.
【００１４】[0014]
【実施例】以下、図面について本発明の実施例を詳細に
説明する。図１〜図４は本発明の山岳、丘陵地における
道路の建設工法の第１実施例を示す各工程の縦断正面図
である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 4 are longitudinal sectional front views of respective steps showing a first embodiment of a road construction method in a mountain or hill area according to the present invention.
【００１５】図１は安定勾配にて切り下げる工程である
が、この切り下げは後述の道路空間として略台形状のボ
ックス７を構築するに先立ち、その台形状のボックス７
の上床板８に相当する部分まで行う。図中２はこの切り
下げによる切土法面、１は施工しようとする道路面であ
る。道路空間断面を台形としたので、上床板８に相当す
る部分の幅は道路幅よりも小さい。FIG. 1 shows a step of cutting down at a stable gradient. This cutting down is performed prior to constructing a substantially trapezoidal box 7 as a road space to be described later.
Up to the portion corresponding to the upper floor plate 8. In the figure, reference numeral 2 denotes a cut slope by this devaluation, and reference numeral 1 denotes a road surface to be constructed. Since the cross section of the road space is trapezoidal, the width of the portion corresponding to the upper floor plate 8 is smaller than the width of the road.
【００１６】次いで、図２に示すように前記切り下げた
位置から斜め外向きに連続した側壁９を構築する。この
側壁９は地山からの土圧を受けるので曲げ耐力が必要で
ある。そこで、側壁９は鋼管または鋼管コンクリート構
造が最適である。Next, as shown in FIG. 2, a side wall 9 which is continuous obliquely outward from the cut-down position is constructed. Since the side wall 9 receives the earth pressure from the ground, the bending strength is required. Therefore, the side wall 9 is optimally made of a steel pipe or a steel pipe concrete structure.
【００１７】図３に示すように、さらに、側壁９の上端
相互をつなぐ上床板８を施工する。この上床板８は両側
の地山からの土圧を支える役目をする圧縮部材であり、
鉄筋コンクリート構造、鉄骨構造、鉄骨鉄筋コンクリー
ト構造等が適する。As shown in FIG. 3, an upper floor plate 8 connecting the upper ends of the side walls 9 is further constructed. The upper floor plate 8 is a compression member serving to support the earth pressure from the ground on both sides,
Reinforced concrete structures, steel frame structures, steel frame reinforced concrete structures, etc. are suitable.
【００１８】このように側壁９と上床板８による台形状
のボックス７が完成した段階で、端部から道路空間断面
の掘削をするのと同時に路床コンクリートを打設して下
床板１０を施工する。なお、側壁９は曲げ部材なので、
第２実施例として図５に示すように下床板１０の端から
斜め上向きの圧縮部材１１を構築して支点間隔を短くす
ることもできる。このようにすれば、側壁９に発生する
曲げモーメントを軽減する上で効果的である。At the stage when the trapezoidal box 7 having the side walls 9 and the upper floor plate 8 is completed, the lower floor plate 10 is constructed by excavating the cross section of the road space from the end and simultaneously casting the subgrade concrete. I do. Since the side wall 9 is a bending member,
As a second embodiment, as shown in FIG. 5, a compression member 11 that is inclined obliquely upward from the end of the lower floor plate 10 can be constructed to shorten the fulcrum interval. This is effective in reducing the bending moment generated on the side wall 9.
【００１９】最後に前記第一段階で掘削した上床板８よ
り上の切土部分を埋め戻す。なお、埋め戻しが必要ない
場合には上床板８にスリットを設けてこれを明かり取り
とすることもできる。Finally, the cut portion above the upper slab 8 excavated in the first stage is backfilled. When backfilling is not necessary, a slit may be provided in the upper floor plate 8 to make it light.
【００２０】ところで、前記のごとく側壁９は土圧を受
ける部材であり、下部が地中に根入れされ、上端が上床
板８に連結された両端固定の曲げ部材である。図８に示
すように従来のボックスカルバートの場合には側壁は鉛
直であるが、本実施例ではこれを外向きに傾斜させた。As described above, the side wall 9 is a member that receives the earth pressure, and the lower end is a bent member fixed at both ends, the lower part being buried in the ground and the upper end connected to the upper floor plate 8. As shown in FIG. 8, in the case of the conventional box culvert, the side wall is vertical, but in the present embodiment, this is inclined outward.
【００２１】前記のごとく、側壁９および上床板８が出
来上がった段階でその下部の掘削をするが、側壁９の下
端が土圧によって内側に変位しないようにするためには
側壁９は深く根入れされていなければならない。ところ
が側壁９を外側に傾斜させることによって、側壁９の下
部の内側方向への変位に対する抵抗が増すので側壁９の
根入れ深さを低減することができる。図８中、矢印は土
圧、αはせん断抵抗線を示す。As described above, when the side wall 9 and the upper floor plate 8 are completed, the lower portion is excavated. However, in order to prevent the lower end of the side wall 9 from being displaced inward due to earth pressure, the side wall 9 must be deeply inserted. Must have been. However, by inclining the side wall 9 outward, the resistance to the inward displacement of the lower portion of the side wall 9 increases, so that the depth of the side wall 9 can be reduced. In FIG. 8, an arrow indicates an earth pressure, and α indicates a shear resistance line.
【００２２】また、第３実施例として、図６に示すよう
に上床板８を上方に凸のアーチ形状にすることもある。
このようにすれば、図７に示すように完成後埋め戻す場
合に設計上有利に働く。なお、この場合は先に埋め戻し
てから下部の掘削をするのでなければ有効にアーチアク
ションを働かせることはできない。As a third embodiment, as shown in FIG. 6, the upper floor plate 8 may have an upwardly convex arch shape.
This is advantageous in terms of design when backfilling after completion as shown in FIG. In this case, the arch action cannot be effectively used unless the lower part is excavated first before excavating the lower part.
【００２３】[0023]
【発明の効果】以上述べたように本発明の山岳、丘陵地
における道路の建設工法は、上床板の施工を下部掘削に
先行して行うので、高い足場等も不要である。As described above, according to the road construction method of the present invention in mountains and hills, since the construction of the upper floor plate is performed prior to the excavation of the lower part, a high scaffold is not required.
【００２４】そして、土圧を受けるシェル構造を先行し
て構築するので、その後の道路空間の掘削を安全に施工
できる。Since the shell structure receiving the earth pressure is constructed first, excavation of the road space thereafter can be safely performed.
【００２５】一方、側壁や上床板はすべて本設の構造体
であり、大規模な仮設山留工事を必要としないので工期
・工費が過大になることもない。On the other hand, the side walls and the upper floor plate are all permanent structures and do not require large-scale temporary pier work, so that the construction period and construction cost do not become excessive.
【００２６】さらに、上床板の幅が短いので切土掘削を
行うのにその掘削量を大幅に削減できるので、掘削土の
処理を簡易にすることができ、また、自然環境の保護に
寄与し、しかも、長大切土法面の維持管理を楽に行える
ものである。Furthermore, since the width of the upper floor plate is short, the amount of excavation for excavating cuts can be greatly reduced, so that the disposal of excavated soil can be simplified and the environment can be protected. In addition, the maintenance and management of long-soil precious slopes can be performed easily.
【図１】本発明の山岳、丘陵地における道路の建設工法
の第１実施例を示す第１工程の縦断正面図である。FIG. 1 is a longitudinal sectional front view of a first step showing a first embodiment of a road construction method in a mountain or hill area according to the present invention.
【図２】本発明の山岳、丘陵地における道路の建設工法
の第１実施例を示す第２工程の縦断正面図である。FIG. 2 is a longitudinal sectional front view of a second step showing the first embodiment of the road construction method in a mountain or hill area according to the present invention.
【図３】本発明の山岳、丘陵地における道路の建設工法
の第１実施例を示す第３工程の縦断正面図である。FIG. 3 is a vertical sectional front view of a third step showing the first embodiment of the road construction method in a mountain or hill area according to the present invention.
【図４】本発明の山岳、丘陵地における道路の建設工法
の第１実施例を示す第４工程の縦断正面図である。FIG. 4 is a vertical sectional front view of a fourth step showing the first embodiment of the road construction method in mountains and hills according to the present invention.
【図５】本発明の山岳、丘陵地における道路の建設工法
の第２実施例を示す縦断正面図である。FIG. 5 is a vertical sectional front view showing a second embodiment of the road construction method in a mountain or hill area according to the present invention.
【図６】本発明の山岳、丘陵地における道路の建設工法
の第３実施例の前段工程を示す縦断正面図である。FIG. 6 is a vertical sectional front view showing a first step of a third embodiment of a road construction method in a mountain or hill area according to the present invention.
【図７】本発明の山岳、丘陵地における道路の建設工法
の第３実施例の後段工程を示す縦断正面図である。FIG. 7 is a longitudinal sectional front view showing a post-stage process of a third embodiment of a road construction method in a mountain or hill area according to the present invention.
【図８】本発明工法の第１〜３実施例の側壁の作用を示
す説明図である。FIG. 8 is an explanatory view showing the operation of the side wall in the first to third embodiments of the method of the present invention.
【図９】従来例の第１例を示す縦断正面図である。FIG. 9 is a longitudinal sectional front view showing a first example of a conventional example.
【図１０】従来例の第２例を示す縦断正面図である。FIG. 10 is a vertical sectional front view showing a second example of the conventional example.
【図１１】従来例の第３例を示す縦断正面図である。FIG. 11 is a longitudinal sectional front view showing a third example of the conventional example.
【図１２】従来例の第４例を示す縦断正面図である。FIG. 12 is a vertical sectional front view showing a fourth example of the conventional example.
１…道路面 ２…切土法面 ３…トンネル ４…グランドア
ンカー ５…地中連続壁 ６…ボックスカ
ルバート ７…ボックス ８…上床板 ９…側壁 １０…下床板 １１…圧縮部材 １２…ボックスDESCRIPTION OF SYMBOLS 1 ... Road surface 2 ... Cut slope 3 ... Tunnel 4 ... Ground anchor 5 ... Underground continuous wall 6 ... Box culvert 7 ... Box 8 ... Upper floor plate 9 ... Side wall 10 ... Lower floor plate 11 ... Compression member 12 ... Box
Claims (2)
築するに先立ち、その台形状のボックスの上床板に相当
する部分まで安定勾配にて切り下げ、この切り下げた位
置から斜め外向きに連続した側壁を構築し、さらに、側
壁をつなぐ上床板を施工し、このように側壁・上床板が
完成した段階で端部から道路空間断面の掘削をすると同
時に路床コンクリートを施工することを特徴とした山
岳、丘陵地における道路の建設工法。1. Prior to constructing a substantially trapezoidal box as a road space, the trapezoidal box is cut down at a stable gradient to a portion corresponding to an upper floor plate, and a side wall extending obliquely outward from the cut-down position. A mountain characterized by constructing a top floor slab that connects the side walls, excavating the road space cross section from the end at the stage when the side wall and the top slab are completed, and simultaneously constructing the subgrade concrete. , Road construction methods in hills.
築するに先立ち、その台形状のボックスの上床板に相当
する部分まで安定勾配にて切り下げ、この切り下げた位
置から斜め外向きに連続した側壁を構築し、さらに、側
壁をつなぐ上床板を施工し、このように側壁・上床板が
完成した段階で端部から道路空間断面の掘削をすると同
時に路床コンクリートを施工し、最後に上床板より上を
埋め戻すことを特徴とした山岳、丘陵地における道路の
建設工法。2. Prior to constructing a substantially trapezoidal box as a road space, the trapezoidal box is cut down at a stable gradient to a portion corresponding to an upper floor plate, and a side wall extending obliquely outward from the cut-down position. Construction, furthermore, construct the upper floor plate connecting the side walls, and at the stage where the side wall and the upper floor plate are completed, excavate the road space cross section from the end and at the same time construct the subgrade concrete, and finally from the upper floor plate Road construction method in mountains and hills characterized by backfilling the top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6007502A JP2769778B2 (en) | 1994-01-27 | 1994-01-27 | Road construction method in mountains and hills |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6007502A JP2769778B2 (en) | 1994-01-27 | 1994-01-27 | Road construction method in mountains and hills |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9305147A Division JPH10114953A (en) | 1997-11-07 | 1997-11-07 | Method for construction of road in mountain and hilly district |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07216916A JPH07216916A (en) | 1995-08-15 |
| JP2769778B2 true JP2769778B2 (en) | 1998-06-25 |
Family
ID=11667564
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6007502A Expired - Lifetime JP2769778B2 (en) | 1994-01-27 | 1994-01-27 | Road construction method in mountains and hills |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2769778B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106567404A (en) * | 2016-11-09 | 2017-04-19 | 中交公局第四工程有限公司 | Expansive soil cutting semi-rigid top retaining wall design and construction method |
-
1994
- 1994-01-27 JP JP6007502A patent/JP2769778B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| 特許６５２６９（ＪＰ，Ｂ１ Ｔ） |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07216916A (en) | 1995-08-15 |
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