JPH09170218A - Debris flow stopping frame - Google Patents
Debris flow stopping frameInfo
- Publication number
- JPH09170218A JPH09170218A JP34911795A JP34911795A JPH09170218A JP H09170218 A JPH09170218 A JP H09170218A JP 34911795 A JP34911795 A JP 34911795A JP 34911795 A JP34911795 A JP 34911795A JP H09170218 A JPH09170218 A JP H09170218A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- debris flow
- bed
- flow stop
- debris
- 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.)
- Granted
Links
Landscapes
- Revetment (AREA)
- Piles And Underground Anchors (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は土石流止め工に係
り、詳しくは、コンクリート基礎を採用することなく河
床を自然のまま機能させることができる土石流捕捉工の
技術分野で利用されるものであって、鋼管の下端に上載
土砂の重みを利用して動きを抑止する底面板と土中埋設
部分の周囲に受働土圧を増大させて滑り抵抗を付加する
受圧フィンとを備える鋼管製櫓形式の土石流止め工に関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a debris flow stop work, and more particularly, it is used in the technical field of debris flow catching work that allows a river bed to function naturally without using a concrete foundation. , A debris flow in the form of a steel pipe slag equipped with a bottom plate that restrains movement by using the weight of the above-mentioned earth and sand at the lower end of the steel pipe, and pressure-receiving fins that increase the passive earth pressure and add slip resistance around the buried portion It is related to stop works.
【０００２】[0002]
【従来の技術】山間の河川等では豪雨によって土石が流
下し、また、倒木が流出する。これらは河川の氾濫を招
いたり家屋の倒壊や橋梁の流失の原因になることが多
く、従来から土石流捕捉工や土石流止め工等が河川内に
設置される。これらは土石流の流体力に耐える必要があ
るが、河床ががれき層である場合には鋼管杭の打ち込み
作業に困難をきわめる。従って、河床を掘り、コンクリ
ート基礎を設けて固定するようにしているのが一般的で
ある。2. Description of the Related Art In a mountain river or the like, heavy rain causes debris to flow down and fallen trees to flow out. These often cause flooding of rivers, collapse of houses and flooding of bridges, and debris flow trapping works and debris flow stopping works have been conventionally installed in rivers. These must withstand the hydrodynamic force of debris flow, but when the bed is a debris layer, it is difficult to drive steel piles. Therefore, it is common to dig the riverbed and install a concrete foundation to fix it.
【０００３】しかし、コンクリート基礎を形成するため
には山間の工事現場に多量の資材を運搬しなければなら
ないこと、流水のある場所でのコンクリート打設作業が
容易でないこと、コンクリートによる自然河床の破壊が
進むことを考慮すると、土石流捕捉工等のためにコンク
リート基礎を築くことは好ましくない。However, in order to form a concrete foundation, a large amount of materials must be transported to a construction site in a mountain, it is not easy to place concrete in a place with running water, and the natural riverbed is destroyed by concrete. Considering the progress of the above, it is not preferable to build a concrete foundation for debris flow trapping work.
【０００４】[0004]
【発明が解決しようとする課題】上記したコンクリート
基礎に代わるものとして、実開平４−６５８３１号公報
には、鋼管杭を用いた土石流止め工等の固定構造が提案
されている。これは、土石流止め工等を構成する鋼管を
櫓状に組み上げ、河床に埋設する脚の下部分に底面板と
受圧フィンとを備えたものとなっている。As an alternative to the concrete foundation described above, Japanese Utility Model Laid-Open No. 4-65831 proposes a fixing structure such as a debris flow stop work using a steel pipe pile. This is one in which steel pipes forming a debris flow stop etc. are assembled into a turret shape, and a bottom plate and pressure-receiving fins are provided at the lower portions of the legs buried in the riverbed.
【０００５】前者は脚の下端に取りつけた例えば鋼製円
板であり、その上載土砂を自重として土石流止め工等の
安定を図るものである。後者は底面板の上方部位にあっ
て埋設脚から放射状に伸び、土圧に対して抵抗力を発生
させ、土石流止め工等の滑りを抑制するように機能する
ものである。The former is, for example, a steel disk attached to the lower ends of the legs, and the earth and sand mounted on the disk is used as its own weight to stabilize debris flow stop works and the like. The latter is located above the bottom plate and extends radially from the buried leg to generate a resistance force against earth pressure, and functions to suppress the slip of debris flow stop works and the like.
【０００６】このような脚構造とすればコンクリート基
礎の採用は回避され、土石流止め工等を河床に固定して
おくという効果をある程度発揮させることができ、施工
の容易化や工期の短縮化等とあいまってその成果を見て
いる。しかし、鋼管製櫓の脚部のみの固定であるがゆえ
に、大きい礫石や流水に伴われた流木による力によって
鋼管製櫓が設置位置からずれたり甚だしくは転倒すると
いったことも起こりかねない。With such a leg structure, the use of a concrete foundation can be avoided, and the effect of fixing debris flow stop works to the river bed can be exhibited to some extent, facilitating construction and shortening the construction period. I am seeing the results together. However, since only the legs of the steel pipe turret are fixed, there is a possibility that the steel pipe turret may be displaced from the installation position or may be seriously overturned due to the force of large pebbles and driftwood accompanied by running water.
【０００７】また、土石流止め工が鋼管製櫓のみからな
っていると、当該櫓の上流側の脚部が河水の流れを少し
は阻害するため淀みが発生したり、分岐流れが生じて局
部的に加速流や攪乱流れが発生し、受圧フィンの近傍の
河床が浸食され、底面板による土石流止め工の固定効果
や受圧フィンによる上載土砂効果を損なうような事態が
起こる。Further, if the debris flow stop is made of a steel pipe slag, the legs on the upstream side of the slag slightly obstruct the flow of river water, causing stagnation or branching flow, resulting in local Acceleration flow and turbulent flow occur in the river, the riverbed near the pressure receiving fin is eroded, and the effect of fixing the debris flow stop work by the bottom plate and the effect of overlaying sediment by the pressure receiving fin occurs.
【０００８】本発明は上記の問題に鑑みなされたもの
で、その目的は、櫓状に組み上げた土石流止め工の河床
に埋設する脚の下部分に底面板と受圧フィンとを備える
構造を採用してコンクリート基礎による河床破壊を防止
すること、土石流に伴われた土砂が鋼管製櫓に堆積する
点に着目し、その堆積土砂の重みを利用して櫓を河床に
安定的に固定しておくことができるようにした土石流止
め工を提供することである。The present invention has been made in view of the above problems, and an object thereof is to adopt a structure in which a bottom plate and a pressure-receiving fin are provided at the lower portion of the leg buried in the riverbed of a debris flow stop constructed into a turret shape. To prevent the riverbed from being destroyed by concrete foundations, paying attention to the point that the sediment accompanying the debris flow accumulates on the steel pipe slag, and use the weight of the accumulated sediment to stably fix the stilt to the riverbed. It is to provide debris flow stop works that can be done.
【０００９】[0009]
【課題を解決するための手段】本発明は、鋼管の下端に
上載土砂の重みを利用して動きを抑止する底面板が取り
つけられると共に、土中埋設部分の周囲に受働土圧を増
大させて滑り抵抗を付加する受圧フィンが固定されてい
る土石流止め工に適用される。その特徴とするところ
は、図１を参照して、底面板６と受圧フィン７とを備え
る幾本かの鋼管杭５を下面に備え、河床面に略平行とな
るように埋設されて土石流の方向へ延びる鋼管製ベッド
２と、この鋼管製ベッド２の下流部分に乗載固定され、
下部分を鋼管製ベッド２と共に埋設した状態で土石流に
対面するように設置される鋼管製櫓３とを備えて土石流
止め工１が形成される。鋼管製櫓３の柱は鋼管製ベッド
２の左右側材２Ｌ，２Ｒをなす長尺鋼管に立設され、そ
の鋼管製櫓３の下流側部分には透水させると共に土石等
１０（図３を参照）をせき止める鋼管格子３Ａが形成さ
れる。一方、上流側部分は土石流が鋼管製ベッド２上を
移動して鋼管格子３Ａへ到るのを可能とする門形構造３
Ｂとなっている。鋼管製ベッド２は鋼管格子３Ａの高さ
まで土石等１０が堆積しても土石流止め工１を流失・転
倒させることのない量の土砂を乗載することができる長
さＬ（図３を参照）となっている。According to the present invention, a bottom plate is attached to the lower end of a steel pipe to restrain the movement by utilizing the weight of the top-mounted earth and sand, and the passive earth pressure is increased around the buried portion. It is applied to the debris flow stop work where the pressure receiving fins that add slip resistance are fixed. The feature is that, referring to FIG. 1, several steel pipe piles 5 having a bottom plate 6 and pressure-receiving fins 7 are provided on the lower surface, and the steel pipe piles 5 are buried so as to be substantially parallel to the riverbed surface to prevent debris flow. A steel pipe bed 2 extending in the direction, and mounted and fixed on a downstream portion of the steel pipe bed 2,
A debris flow stop 1 is formed by including a steel pipe slag 3 which is installed so as to face the debris flow in a state where the lower portion is buried with the steel pipe bed 2. The pillars of the steel pipe turret 3 are erected on the long steel pipes forming the left and right side members 2L and 2R of the steel pipe bed 2, and the downstream portion of the steel pipe turret 3 is made to permeate water and debris 10 (see FIG. 3). ) Is formed to form a steel tube lattice 3A. On the other hand, in the upstream portion, the debris flow moves on the steel pipe bed 2 and reaches the steel pipe lattice 3A.
It is B. The steel pipe bed 2 has a length L (see FIG. 3) capable of carrying an amount of earth and sand that does not cause the debris flow stop 1 to be washed away or toppled even if debris 10 accumulates up to the height of the steel pipe lattice 3A. Has become.
【００１０】土石流止め工１は、図５を参照して、予想
される流入礫石１０の最大径Ｄの少なくとも３倍の幅Ｗ
に選定しておくとよい。また、土石流止め工１を河幅方
向に複数配置するとき、隣りあう土石流止め工１，１の
間隔Ｓを、予想される流入礫石１０の最大径Ｄの１．５
倍以内となっていることが好ましい。With reference to FIG. 5, the debris flow stop 1 has a width W that is at least 3 times the maximum diameter D of the expected inflow gravel stone 10.
It is recommended to select it. Moreover, when arranging a plurality of debris flow stop works 1 in the river width direction, the interval S between the adjacent debris flow stop works 1, 1 is set to 1.5 of the maximum diameter D of the expected inflow gravel stones 10.
It is preferably within double.
【００１１】鋼管製櫓３は側面から見て略台形をなして
いるか（図４を参照）、三角形をなしているものとすれ
ばよい（図３を参照）。The steel pipe turret 3 may have a substantially trapezoidal shape when viewed from the side (see FIG. 4) or a triangular shape (see FIG. 3).
【００１２】鋼管製ベッド２の上流側先端部分、鋼管製
櫓３の上流側部分の門形構造３Ｂの脚部の直下及び下流
側部分の鋼管格子３Ａの脚部の直下に鋼管杭５を配置し
ておく（図１を参照）。The steel pipe piles 5 are arranged immediately below the legs of the gate-shaped structure 3B at the upstream end of the steel pipe bed 2, at the upstream portion of the steel pipe turret 3, and immediately below the legs of the steel pipe lattice 3A at the downstream portion. (See Figure 1).
【００１３】鋼管製櫓３の側面には、図３に示すよう
に、補強のため及び堆積土砂・礫石１０の流失を抑制す
る鋼管製梁３ｍや鋼管製斜材３ｎが取りつけられる。As shown in FIG. 3, a steel pipe beam 3m and a steel pipe diagonal member 3n are attached to the side surface of the steel pipe slag 3 for reinforcement and for suppressing the loss of the sediment and gravel 10.
【００１４】[0014]
【発明の効果】本発明によれば、底面板と受圧フィンと
を備える幾本かの鋼管杭を下面に備える鋼管製ベッドが
河床面に略平行となるように埋設されるので、土石流の
ない場合には底面板に作用する上載土砂の重みを利用し
て鋼管製ベッドの動きを抑止しておくことができる。河
水流が増大した場合には、鋼管製櫓に作用する流体力に
抗して受圧フィンが受働土圧を増大させて滑り抵抗を付
加させる。それのみならず、鋼管製櫓の上流側柱等の基
部において河床の流水浸食が発生したとしても、鋼管製
櫓を固定している鋼管製ベッドの全体が土中にあって、
局部的な浸食作用の影響がほとんど及ばなくなる。土石
流が発生した場合には、鋼管製櫓によってせき止められ
た土砂が鋼管製ベッドに堆積するので、その土砂量が多
くなるほどその重みによって土石流止め工の全体の固定
力が増強され、河床における安定を自然作用を利用して
図ることができるようになる。According to the present invention, since a steel pipe bed having several steel pipe piles having a bottom plate and pressure receiving fins on the lower surface is buried so as to be substantially parallel to the riverbed surface, there is no debris flow. In this case, it is possible to prevent the movement of the steel pipe bed by using the weight of the top loading sand acting on the bottom plate. When the river flow increases, the pressure-receiving fins increase the passive earth pressure against the fluid force acting on the steel pipe slag to add slip resistance. Not only that, even if running water erosion of the river bed occurs at the base such as the upstream side column of the steel pipe turret, the entire steel pipe bed fixing the steel pipe turret is in the soil,
The effects of local erosion are almost negligible. When a debris flow occurs, the earth and sand dammed up by the steel pipe slag deposits on the steel pipe bed, so the larger the amount of sand and sand, the more the weight of the debris flow stop will increase the overall fixing force and the stability of the riverbed. You will be able to make use of natural effects.
【００１５】土石流止め工の幅を予想される流入礫石の
最大径の少なくとも３倍に選定しておけば、鋼管製ベッ
ド上で大小の土石の干渉があっても、河水に伴われて鋼
管製櫓の上流側の門形構造部分から下流側部分の鋼管格
子まで土石等を到達させることができ、鋼管製櫓を土石
流止め工として十分に機能させることができるようにな
る。If the width of the debris flow stop is selected to be at least three times the expected maximum diameter of the inflowing pebbles, even if there is interference between large and small debris on the steel pipe bed, the steel pipe will be produced by the river water. Debris and the like can be made to reach from the gate-shaped structural portion on the upstream side of the turret to the steel pipe lattice on the downstream side, and the steel pipe turret can be made to sufficiently function as a debris flow stop work.
【００１６】土石流止め工を河幅方向に複数配置すると
き、隣りあう土石流止め工の間隔を予想される流入礫石
の最大径の１．５倍以内としておけば、土石の干渉作用
によって隣りあう土石流止め工の間から流出する土石や
土砂の量を可及的に抑制することができる。上記の間隔
は礫石の捕捉に寄与するだけでなく、スリットダムとし
ても機能させることができる。従って土石流止め工を接
触するように配置する必要がなくなり、土石流止め工の
使用数の低減も図られる。When a plurality of debris flow stop works are arranged in the river width direction, if the interval between the debris flow stop works adjacent to each other is set to be within 1.5 times the maximum diameter of the expected inflowing gravel stones, the debris flow adjoining by the debris interference action. It is possible to suppress the amount of debris and earth and sand that flow out between the stop works as much as possible. The above-mentioned interval not only contributes to trapping of pebbles, but can also function as a slit dam. Therefore, it is not necessary to arrange the debris flow stoppers in contact with each other, and the number of debris flow stoppers used can be reduced.
【００１７】鋼管製櫓が側面から見ると略台形をなすよ
うに形成しておくと、上流側部分の門形構造と下流側部
分の鋼管格子とで囲まれる鋼管製櫓の容積を大きくして
おくことができ、土石の収容量の拡大が図られる。If the steel pipe turret is formed so as to have a substantially trapezoidal shape when viewed from the side, the volume of the steel pipe turret surrounded by the gate-shaped structure of the upstream portion and the steel pipe lattice of the downstream portion is increased. It can be stored and the capacity of debris can be expanded.
【００１８】鋼管製櫓を側面から見て三角形としておけ
ば、鋼管製櫓に使用される鋼管使用量が少なくなり、従
って、櫓を形成しておくための左右の三角形の連結部材
を構成する鋼管量も節減された土石流止め工としておく
ことができる。また、鋼管製櫓の上流側部分の門形構造
を形成する鋼管が河水流に対して矢尻状となるので、下
方向への分岐流を少なくして門形構造の基部における鋼
管製ベッド上の河床浸食を抑制することもできる。If the steel pipe turret is triangular when viewed from the side, the amount of steel pipe used in the steel pipe turret is reduced, and therefore the steel pipes forming the left and right triangular connecting members for forming the turret are formed. The amount of debris can be kept as a debris stop. In addition, since the steel pipe forming the gate-shaped structure in the upstream part of the steel pipe turret has an arrowhead shape with respect to the river flow, the downward branch flow is reduced and the steel pipe bed at the base of the gate-shaped structure is reduced. It can also control riverbed erosion.
【００１９】鋼管製ベッドの上流側先端部分や、鋼管製
櫓の上流側部分の門形構造の脚部の直下及び下流側部分
の鋼管格子の脚部の直下に鋼管杭を配置しておくと、河
水流圧や土石流の圧力が鋼管製ベッドに伝達されても、
その直接的に荷重の作用する箇所が鋼管杭によって対抗
力を発揮し、鋼管製ベッドの河床に対する固定の安定が
図られやすくなる。When the steel pipe piles are arranged immediately below the upstream end of the steel pipe bed, directly below the legs of the gate structure at the upstream portion of the steel pipe turret, and directly below the legs of the steel pipe lattice at the downstream portion. , Even if river water pressure or debris flow pressure is transmitted to the steel pipe bed,
The portion where the load is directly exerted exerts a counter force by the steel pipe pile, and the fixation of the steel pipe bed to the bed becomes easier to stabilize.
【００２０】鋼管製櫓の側面に鋼管製梁や鋼管製斜材を
取りつけておけば、鋼管製櫓の補強が図られるだけでな
く、鋼管製櫓内の堆積土砂や礫石の流失を抑制すること
ができる。By attaching a steel pipe beam or a steel pipe diagonal member to the side surface of the steel pipe turret, not only the steel pipe turret can be reinforced but also the sedimentation of gravel stones and sediment in the steel pipe turret can be suppressed. You can
【００２１】[0021]
【発明の実施の形態】以下に、本発明に係る土石流止め
工を、その実施の形態を示した図面に基づいて詳細に説
明する。図１は河床１１に設置される透過型ダムなどと
しての土石流止め工１の単体構造の斜視図であり、鋼管
を接合することによって組み立てられた鋼管製ベッド２
と鋼管製櫓３とからなっている。図の右が河水流の上流
側であり、河水流や土石流は矢印４のように移動する。
このような土石流止め工１の鋼管製ベッド２には鋼管杭
５が設けられ、その鋼管杭５の下端に上載土砂の重みを
利用して動きを抑止する底面板６が取りつけられると共
に、土中埋設部分の周囲に受働土圧を増大させて滑り抵
抗を付加する受圧フィン７が固定されている。BEST MODE FOR CARRYING OUT THE INVENTION The debris flow stop according to the present invention will be described in detail below with reference to the drawings showing the embodiment. FIG. 1 is a perspective view of a single structure of a debris flow stop 1 as a transmission dam installed on a riverbed 11, which is a steel pipe bed 2 assembled by joining steel pipes.
And a steel pipe turret 3. The right side of the figure is the upstream side of the river flow, and the river flow and debris flow move as shown by arrow 4.
A steel pipe pile 5 is provided on the steel pipe bed 2 of the debris flow stop 1 as described above, and a bottom plate 6 is attached to the lower end of the steel pipe pile 5 to restrain the movement by utilizing the weight of the sedimented sand and the soil. A pressure receiving fin 7 is fixed around the buried portion to increase the passive earth pressure and add a slip resistance.
【００２２】鋼管製ベッド２は河床面に略平行となるよ
うに河水や土砂・土石の流れの方向へ延びて埋設される
ものであり、図示の例では長手方向に延びる長尺な鋼管
製の左右側材２Ｌ，２Ｒと、これらを接続する前後の連
結材２Ｍ，２Ｎと、左右側材２Ｌ，２Ｒに中間にあって
平行な中央縦材２Ｃとからなっている。これらの部材は
一本の鋼管であってもよいし、図示したようにフランジ
２ａ，２ａを使用して接続したものであってもよい。も
ちろん、中央縦材２Ｃは二本以上あってもよいし、連結
材２Ｍ，２Ｎに平行もしくは傾斜する破線で示した連結
補助材２ｍ，２ｎを左右側材２Ｌ，２Ｒや中央縦材２Ｃ
に接続するようにしてもよいことは言うまでもない。The steel pipe bed 2 extends in the direction of flow of river water, earth and sand, and debris so as to be substantially parallel to the riverbed surface, and is buried. In the illustrated example, the bed 2 is made of a long steel pipe extending in the longitudinal direction. It is composed of left and right members 2L and 2R, connecting members 2M and 2N before and after connecting them, and a central vertical member 2C which is intermediate and parallel to the left and right members 2L and 2R. These members may be a single steel pipe or may be connected by using the flanges 2a, 2a as illustrated. Of course, there may be two or more central vertical members 2C, and connecting auxiliary members 2m and 2n shown by broken lines parallel or inclined to the connecting members 2M and 2N may be used as the left and right lateral members 2L and 2R and the central vertical member 2C.
Needless to say, it may be connected to.
【００２３】このような鋼管製ベッド２の左側材２Ｌや
右側材２Ｒの下面もしくは左右側材２Ｌ，２Ｒと連結材
２Ｍ，２Ｎとの交差部分の近傍の下部に鋼管杭５，５が
固定されている。その鋼管杭５の下端部に底面板６が溶
接等によって取りつけられ、底面板６の上方にあって鋼
管杭５から放射状に張り出すように受圧フィン７が何枚
か固定されている。底面板６は鋼板を円板状もしくは矩
形状としたものであればよく、受圧フィン７，７は短冊
状の鋼板を図２に示すように平面的には十字形となるよ
うに配置される。Steel pipe piles 5, 5 are fixed to the lower surface of the left side member 2L and the right side member 2R of the steel pipe bed 2 or the lower portion near the intersection of the left and right side members 2L, 2R and the connecting members 2M, 2N. ing. A bottom plate 6 is attached to the lower end portion of the steel pipe pile 5 by welding or the like, and some pressure receiving fins 7 are fixed above the bottom plate 6 so as to radially project from the steel pipe pile 5. The bottom plate 6 may be a circular or rectangular steel plate, and the pressure-receiving fins 7 and 7 are strip-shaped steel plates arranged in a cross shape in plan view as shown in FIG. .
【００２４】受圧フィン７は河床１１の土圧を受けて鋼
管製ベッド２の滑り抵抗を増大させるものであるので、
一般的には、一直線状に配置された少なくとも一対の受
圧フィン７，７の面が河水流４に対して垂直とされる。
もちろん、受圧フィン７は四枚にかぎらず１２０度間隔
の三枚としてもよいし、受圧フィン７の幅をその高さに
近づけたりそれより大きい矩形状してもよい。受圧フィ
ン７の外縁７ａは図２のように底面板６の周縁６ａと一
致していなければならないというものでない。しかし、
図１のように、受圧フィン７の下縁を底面板６の上面に
一致させ、その交差部位に隅肉溶接等を施せば、受圧フ
ィン７の変形を抑制しておくことができる。Since the pressure-receiving fins 7 receive the earth pressure of the riverbed 11 and increase the slip resistance of the steel pipe bed 2,
Generally, the surfaces of at least a pair of pressure receiving fins 7, 7 arranged in a straight line are perpendicular to the river flow 4.
Of course, the number of the pressure receiving fins 7 is not limited to four, and may be three at intervals of 120 degrees, or the width of the pressure receiving fins 7 may be close to its height or may be a rectangular shape larger than that. The outer edge 7a of the pressure receiving fin 7 does not have to match the peripheral edge 6a of the bottom plate 6 as shown in FIG. But,
As shown in FIG. 1, if the lower edge of the pressure receiving fin 7 is made to coincide with the upper surface of the bottom plate 6 and fillet welding or the like is performed at the intersection, the deformation of the pressure receiving fin 7 can be suppressed.
【００２５】上記の鋼管杭５は鋼管製ベッド２の上流側
先端部分と下流側先端部分に設けられることは言うまで
もないが、必要に応じて河水流方向の中間部位や中央縦
材２Ｃなどの下面にも取りつけられる（図示せず）。こ
のような鋼管杭５，５を備えた鋼管製ベッド２の下流部
分に鋼管製櫓３が乗載固定され、鋼管製ベッド２を河床
１１に埋設させた状態で土石流に対面するように配置さ
れる。Needless to say, the steel pipe piles 5 are provided at the upstream end portion and the downstream end portion of the steel pipe bed 2, but if necessary, an intermediate portion in the river flow direction or the lower surface of the central vertical member 2C, etc. Can also be attached (not shown). A steel pipe turret 3 is mounted and fixed on a downstream portion of the steel pipe bed 2 including the steel pipe piles 5 and 5, and the steel pipe bed 2 is arranged so as to face the debris flow while being buried in the river bed 11. It
【００２６】鋼管製櫓３は図３の例においては、側面か
ら見て三角形をなしているが、図４のように側面から見
て略台形等をなした恰好でもよい。いずれにしても、下
流側部分には鋼管格子３Ａが形成され上流側部分は門形
構造３Ｂとなっており、土石流がある場合に、河水に伴
われた土石や土砂が鋼管製櫓３内に堆積しやすい形とな
るように配慮されている。In the example of FIG. 3, the steel pipe turret 3 has a triangular shape when viewed from the side, but it may have a substantially trapezoidal shape when viewed from the side as shown in FIG. In any case, the steel pipe lattice 3A is formed in the downstream portion and the upstream portion has the gate-shaped structure 3B, and when there is a debris flow, the debris and the earth and sand accompanying the river water are stored in the steel pipe turret 3. It is designed so that it can be easily deposited.
【００２７】鋼管製櫓３も鋼管を溶接したりフランジ３
ａ，３ａを介した接続することによって組み立てられる
が、各側面を形成する面組３Ｌ，３Ｒは鋼管製ベッド２
の左右側材２Ｌ，２Ｒの上面等にフランジ３ａ等を介し
て固定される。鋼管格子３Ａは河水流を透過させると共
に土石流をせき止める透水型構造とされており、図１の
ように、鋼管製ベッド２の連結材２Ｎに平行な水平材３
Ｃが複数本取りつけられている。なお、図示しないが、
鋼管格子３Ａを形成させるために、水平材３Ｃに交差す
る上下に延びる鋼管を介在させ、格子の数を増やしても
よい。The steel pipe slag 3 is also used for welding steel pipes and flanges 3.
Although assembled by connecting via a and 3a, the surface sets 3L and 3R forming each side surface are the steel pipe bed 2
It is fixed to the upper surfaces of the left and right side members 2L and 2R via flanges 3a and the like. The steel tube lattice 3A has a water-permeable structure that allows the river water flow to pass through and blocks the debris flow, and as shown in FIG. 1, a horizontal member 3 parallel to the connecting member 2N of the steel pipe bed 2 is provided.
Multiple C's are attached. Although not shown,
In order to form the steel tube lattice 3A, a vertically extending steel pipe intersecting the horizontal member 3C may be interposed to increase the number of lattices.
【００２８】上記の水平材３Ｃの上下の間隔Ｔは、予想
される流入礫石１０（図３を参照）の最大径Ｄに略等し
いかそれより少し大きい程度にしておけばよい。左右の
柱間に水平材３Ｃに交差した鋼管を介在させる場合に
は、形成された格子の左右幅も最大径Ｄに略等しいかそ
れより少し大きい程度とされることになる。一方、上流
側部分は土石流が鋼管製ベッド２上を移動して鋼管格子
３Ａへ到るのを可能とするように開放された門形構造３
Ｂとなっているので、原則的には水平材等が配置されな
いが、補強の意味で細い鋼管（図示せず）を配置してお
いてもよい。The vertical interval T of the horizontal member 3C may be set to be approximately equal to or slightly larger than the expected maximum diameter D of the inflowing pebbles 10 (see FIG. 3). When a steel pipe intersecting the horizontal member 3C is interposed between the left and right columns, the left and right width of the formed grid is also approximately equal to or slightly larger than the maximum diameter D. On the other hand, the upstream portion is open to allow the debris flow to move on the steel pipe bed 2 and reach the steel pipe lattice 3A.
Since it is B, a horizontal member or the like is not arranged in principle, but a thin steel pipe (not shown) may be arranged for reinforcement.
【００２９】前記した鋼管杭５は、鋼管製櫓３の下流側
部分の鋼管格子３Ａの柱の基部直下及び上流側部分の門
形構造３Ｂの柱の基部直下にも配置される。もちろん、
鋼管製櫓３の下方のいずれかの箇所に必要に応じて鋼管
杭５を追加してもよい。これらの鋼管杭５，５は原則的
には鋼管製ベッド２に取りつけられるが、鋼管製ベッド
２は鋼管格子３Ａの高さまで土石等１０が堆積しても土
石流止め工１を流失・転倒させることのない量の土砂を
乗載することができる長さに選定される。すなわち、上
載土砂量を予測しておき、その重みを利用して土石流止
め工１の安定を図るようにしている。The above-mentioned steel pipe piles 5 are also arranged immediately below the bases of the columns of the steel pipe lattice 3A at the downstream side of the steel pipe slag 3 and immediately below the bases of the columns of the portal structure 3B at the upstream side. of course,
A steel pipe pile 5 may be added to any part below the steel pipe slag 3 as needed. These steel pipe piles 5 and 5 are in principle attached to the steel pipe bed 2, but the steel pipe bed 2 should not cause the debris flow stop 1 to be washed away even if debris 10 accumulates up to the height of the steel pipe lattice 3A. It is selected to have a length that can carry a certain amount of sediment. That is, the amount of loaded sediment is predicted in advance, and the weight is used to stabilize the debris flow stop 1.
【００３０】鋼管製櫓３の高さは設置される河川の水量
により異なるので大小いろいろあるが、例えば３ないし
７メートル程度であり、図３のように鋼管製ベッド２は
鋼管製櫓３の高さＨの１．５倍ないし３倍程度の長さＬ
に選定しておけば十分であることが多い。鋼管杭５の深
さは例えば２メートル程度である。鋼管自体の直径は６
０センチメートル程度でよいが、中央縦材２Ｃ等（図１
を参照）の採用本数によって異なることは述べるまでも
ない。The height of the steel pipe turret 3 varies depending on the amount of water in the river in which it is installed, but it varies from large to small, for example, about 3 to 7 meters. As shown in FIG. 3, the steel pipe bed 2 has a height of the steel pipe turret 3. Length L about 1.5 to 3 times H
It is often sufficient to select it. The depth of the steel pipe pile 5 is, for example, about 2 meters. The diameter of the steel pipe itself is 6
It may be about 0 centimeters, but the center vertical member 2C (Fig. 1
It goes without saying that it will differ depending on the number of adoptions.
【００３１】このような構造の土石流止め工１によれ
ば、次のようにして河床１１に対する安定を図ることが
できる。まず、工場において鋼管製ベッド２や鋼管製櫓
３を構成する鋼管を所定の長さに切断し端部にフランジ
２ａ，３ｂを取りつけた鋼管体８を製作すると共に、底
面板６と受圧フィン７を取りつけた鋼管杭５も製作して
おき、鋼管杭５は所定の鋼管体８に溶接等により予め一
体化しておく。鋼管製櫓３の面組３Ｌ，３Ｒも予め組み
立てておく。これらを工事現場に搬入するのは嵩張らな
いので、車両による輸送や現場での荷卸しも容易なもの
となる。According to the debris flow stop 1 having such a structure, it is possible to stabilize the river bed 11 as follows. First, in a factory, a steel pipe constituting a steel pipe bed 2 and a steel pipe slag 3 is cut into a predetermined length, and a steel pipe body 8 having flanges 2a and 3b attached to the ends thereof is manufactured, and a bottom plate 6 and a pressure receiving fin 7 are formed. The steel pipe pile 5 attached with is also manufactured, and the steel pipe pile 5 is previously integrated with a predetermined steel pipe body 8 by welding or the like. The frame sets 3L and 3R of the steel pipe turret 3 are also assembled in advance. Since it is not bulky to carry these items to the construction site, transportation by vehicles and unloading at the site are easy.
【００３２】現場で各フランジをボルト接合して鋼管杭
５のついた鋼管製ベッド２を組み立てる。そして、鋼管
杭５が河床１１に埋設されるように鋼管製ベッド２を河
床に配置したり鋼管製ベッド２も埋没するように設置さ
れる（図３を参照）。その鋼管製ベッド２の所定の位置
に鋼管製櫓３をボルトによって接合しながら組み上げ
る。通常は図３のように、鋼管製櫓３の基部を覆うよう
に河床１１に略平行に埋設される。実際は図のごとく河
床１１が僅かに傾斜しているので、鋼管製ベッド２自体
は水平に設置されることが多い。At the site, the flanges are bolted together to assemble the steel pipe bed 2 with the steel pipe piles 5. Then, the steel pipe beds 2 are arranged on the riverbed so that the steel pipe piles 5 are buried in the riverbed 11, and the steel pipe beds 2 are also buried (see FIG. 3). The steel pipe turret 3 is assembled at a predetermined position of the steel pipe bed 2 while being joined with bolts. Normally, as shown in FIG. 3, the steel pipe slag 3 is embedded in the riverbed 11 substantially parallel to the base of the slag 3. Actually, as shown in the figure, the bed 11 is slightly inclined, so that the steel pipe bed 2 itself is often installed horizontally.
【００３３】ちなみに、鋼管製ベッド２に鋼管製櫓３を
一体化させた後に河床に降ろし、所望する深さに鋼管製
ベッド２を河床に埋設したり、場合によっては鋼管杭５
のみを埋設するといったようにしてもよい。設置後の時
間の経過に伴い鋼管製ベッド２が川砂で覆われるが、重
りになるような手ごろな石を予め載せておいても、ま
た、その石や岩でもって自然穿掘の発生を抑制するよう
に配慮しておくこともできる。By the way, the steel pipe bed 2 is integrated with the steel pipe turret 3 and then lowered to the river bed, and the steel pipe bed 2 is buried in the river bed at a desired depth, or in some cases, the steel pipe pile 5 is used.
Only one of them may be buried. The steel pipe bed 2 will be covered with river sand with the passage of time after installation, but even if a reasonable stone that becomes a weight is placed in advance, the occurrence of natural excavation with that stone or rock will be suppressed. You can also consider doing so.
【００３４】河川が常水量であると鋼管製櫓３の下半の
一部が河水に浸る程度であり、増水すると鋼管製櫓３の
頭部分が流水から僅かに出るか少し没する程度となる。
その場合、底面板６と受圧フィン７とを備える幾本かの
鋼管杭５を下面に備える鋼管製ベッド２が河床１１に少
し傾斜して埋設されるか鋼管杭５が埋没した状態にあ
り、底面板６に作用する上載土砂の重みを利用して鋼管
製ベッド２の動きが抑止される。増水時には鋼管製櫓３
の門形構造３Ｂや透過型構造の鋼管格子３Ａの柱部に作
用する流体力に抗して受圧フィン７が受働土圧を増大さ
せ、土石流止め工１が滑らないように抵抗力を発生させ
る。すなわち、土石流の流体力や堆砂圧等の水平力は受
圧フィン７と土石流止め工１上の上載土砂の重みとよっ
て対抗されることになる。If the river has a normal amount of water, the lower half part of the steel pipe turret 3 will be submerged in the river water, and if the water level increases, the head part of the steel pipe turret 3 will slightly come out of the running water or be slightly submerged. .
In that case, the steel pipe bed 2 having several steel pipe piles 5 including the bottom plate 6 and the pressure receiving fins 7 on the lower surface is buried in the river bed 11 with a slight inclination or the steel pipe piles 5 are buried, The movement of the steel pipe bed 2 is restrained by utilizing the weight of the top loading sand acting on the bottom plate 6. Steel pipe turret 3 when water increases
The pressure-receiving fins 7 increase the passive earth pressure against the fluid force acting on the columns of the gate-shaped structure 3B and the steel pipe lattice 3A of the transmission type structure, and generate a resistance force so that the debris flow stop 1 does not slip. . That is, the horizontal force such as the fluid force of the debris flow and the sediment pressure is opposed by the weight of the pressure receiving fin 7 and the overlaid sediment on the debris flow stop 1.
【００３５】鋼管製ベッド２の上流側において河床１１
の流水浸食が日頃から少しずつ発生したとしても、鋼管
杭５が河床内にあって、また、鋼管製櫓３の上流側脚等
において河床の浸食が発生しても、鋼管製櫓３を固定し
ている鋼管製ベッド２の全体が土中等にあって、局部的
な浸食の影響はほとんどない。On the upstream side of the steel pipe bed 2, the river bed 11
Even if the running water erosion occurs gradually, the steel pipe stake 3 is fixed even if the steel pipe piles 5 are inside the riverbed and the riverbed erosion occurs at the upstream leg of the steel pipe slag 3 or the like. The entire steel pipe bed 2 in use is in the soil or the like, and there is almost no effect of local erosion.
【００３６】土石流が発生した場合には、鋼管製櫓３に
よって土砂や礫石１０がせき止められ、図３のように鋼
管製ベッド２に順次堆積する。鋼管製櫓３の上流側は門
形構造３Ｂであり、そこを通過して鋼管格子３Ａまで移
動する。鋼管製櫓３の面組３Ｌ，３Ｒに鋼管製梁３ｍや
鋼管製斜材３ｎが取りつけられており、鋼管製櫓３の補
強が図られるだけでなく、鋼管製櫓３内の堆積土砂や礫
石１０の流失も抑制される。When a debris flow occurs, the sand and gravel stones 10 are dammed up by the steel pipe slag 3 and are sequentially deposited on the steel pipe bed 2 as shown in FIG. The upstream side of the steel pipe turret 3 has a portal structure 3B, and passes through it to move to the steel pipe lattice 3A. Steel pipe beams 3m and steel pipe diagonal members 3n are attached to the frame sets 3L and 3R of the steel pipe turret 3, so that not only reinforcement of the steel pipe turret 3 but also accumulated sediment and gravel in the steel pipe turret 3 can be achieved. The loss of 10 is also suppressed.
【００３７】土砂の堆積量が破線の状態から二点鎖線の
状態のように多くなると鋼管製ベッド２上にも大量の土
砂や礫石１０が溜まり、その重みによって鋼管製ベッド
２に掛かる重みが増大し、土石流止め工１の全体の固定
力が増強され、河床１１における安定が自然作用を利用
して図られる。これによって、土石流止め工１の滑りや
転倒は回避され、鋼管製櫓３によって土石や流木の流失
は可及的に抑止され、河川の氾濫、家屋の倒壊や橋梁の
流失が防止される。When the amount of accumulated sediment increases from the state of the dashed line to the state of the chain double-dashed line, a large amount of sediment and gravel stones 10 accumulate on the steel pipe bed 2, and the weight increases the weight of the steel pipe bed 2. However, the fixing force of the entire debris flow stop 1 is enhanced, and the river bed 11 is stabilized by utilizing the natural action. As a result, the debris flow stop 1 is prevented from slipping or falling down, and the steel pipe slag 3 prevents the debris and driftwood from flowing away as much as possible, and prevents flooding of rivers, collapse of houses, and bridges.
【００３８】鋼管製櫓３を側面から見て三角形としてお
けば、鋼管製櫓３に使用される鋼管使用量が次に述べる
略台形状の場合より少なくなり、従って、櫓を形成する
左右の三角形の連結部材３ｍ，３ｎとしての鋼管量も節
減された土石流止め工１となる。鋼管製櫓３の上流側部
分の門形構造３Ｂを形成する脚部分の鋼管が河水流に対
して矢尻状となるので、上向き流れ１２（図３を参照）
が助長され、下方向への分岐流を少なくして門形構造３
Ｂの基部における鋼管製ベッド２上の河床浸食も抑制さ
れる。If the steel pipe turret 3 is formed into a triangular shape when viewed from the side, the amount of steel pipe used for the steel pipe turret 3 is smaller than in the case of the substantially trapezoidal shape described below, and therefore the left and right triangles forming the turret are formed. The debris flow stop work 1 in which the amount of steel pipes as the connecting members 3m and 3n is also reduced. Upward flow 12 (see FIG. 3) because the steel pipe of the leg portion forming the gate-shaped structure 3B on the upstream side of the steel pipe turret 3 has an arrowhead shape with respect to the river flow.
The gate-shaped structure 3 is promoted by reducing the downward branch flow.
Riverbed erosion on the steel pipe bed 2 at the base of B is also suppressed.
【００３９】鋼管製櫓３が側面から見ると略台形をなす
図４のようであれば、土石流止め工１自体がやや長いも
のとなり、下流側部分の鋼管格子３Ａと上流側部分の門
形構造３Ｂとで囲まれる鋼管製櫓３の容積が大きくな
り、土石の収容量の拡大が図られる。If the steel pipe turret 3 has a substantially trapezoidal shape when viewed from the side, as shown in FIG. 4, the debris flow stop 1 itself is rather long, and the steel pipe lattice 3A of the downstream side portion and the gate-shaped structure of the upstream side portion. The volume of the steel pipe turret 3 surrounded by 3B is increased, and the amount of debris to be accommodated is increased.
【００４０】鋼管製ベッド２の上流側先端部分や、少な
くとも鋼管製櫓３の上流側部分の門形構造３Ｂの脚部の
直下及び下流側部分の鋼管格子３Ａの脚部の直下に鋼管
杭５を配置しておく場合には、河水流圧や土石流圧力が
各柱部を介して鋼管製ベッド２に伝達されても、直接的
に荷重の作用する箇所が鋼管杭５によって対抗されるこ
とになる。すなわち、鋼管杭５に作用するモーメントを
可及的に小さくして、鋼管製ベッド２の河床１１に対す
る固定の安定性を増強させることができる。The steel pipe piles 5 are provided directly below the legs of the gate structure 3B at the upstream end of the steel pipe bed 2 and at least at the upstream of the steel pipe turret 3 and immediately below the legs of the steel pipe lattice 3A at the downstream portion. If the river water pressure and the debris flow pressure are transmitted to the steel pipe bed 2 through each column, the location where the load is directly applied is countered by the steel pipe pile 5 Become. That is, the moment acting on the steel pipe pile 5 can be made as small as possible to enhance the stability of fixing the steel pipe bed 2 to the river bed 11.
【００４１】常水量に戻ったときに、土砂を鋼管製ベッ
ド２の上流側部分から順次鋼管製櫓３の中まで取り除く
ようにすれば、次の土石流の発生に備えることができ
る。鋼管製ベッド２上の土石等１０の除去作業は容易で
あり、鋼管製櫓３内の除去は鋼管製ベッド２を足場とし
て安定した状態で行うことができる。When the amount of water is returned to normal, the earth and sand are sequentially removed from the upstream portion of the steel pipe bed 2 to the inside of the steel pipe slag 3 so that the next debris flow can be prepared. The work of removing the earth and stones 10 on the steel pipe bed 2 is easy, and the removal of the steel pipe slag 3 can be performed in a stable state using the steel pipe bed 2 as a scaffold.
【００４２】図５は複数の土石流止め工１，１を河幅方
向に並べた場合の概略平面矢視図であり、土石流止め工
１の河幅方向の長さＷは、予想される流入礫石１０の最
大径Ｄの少なくとも３倍に選定される。そして、土石流
止め工１，１の隣りあう間隔Ｓは、予想される流入礫石
１０の最大径Ｄの１．５倍以内しておくことが好まし
い。FIG. 5 is a schematic plan view when a plurality of debris flow stop works 1, 1 are arranged in the river width direction, and the length W of the debris flow stop work 1 in the river width direction is an expected inflow gravel stone. At least 3 times the maximum diameter D of 10 is selected. It is preferable that the adjoining space S between the debris flow stoppers 1 and 1 is within 1.5 times the expected maximum diameter D of the inflow gravel stone 10.
【００４３】上記のような土石流止め工１の幅寸法とし
ておくと、鋼管製ベッド２上で大小の土石の干渉があっ
ても河水に伴われて鋼管製櫓３の上流側の門形構造３Ｂ
の部分から下流側部分の鋼管格子３Ａまで土石等１０を
到達させることができ、鋼管製櫓３を土石流止め工１と
して十分に機能させることができるようになる。When the width dimension of the debris flow stop 1 is set as described above, even if there is interference between large and small debris on the steel pipe bed 2, it is accompanied by river water and is upstream of the steel pipe slag 3 in the gate-shaped structure 3B.
The debris and the like 10 can reach the steel pipe lattice 3A at the downstream side from the portion of (1), and the steel pipe slag 3 can sufficiently function as the debris flow stop 1.
【００４４】土石流止め工１の間隔Ｓが予想される流入
礫石１０の最大径Ｄの１．５倍以内であれば、土石１０
の干渉作用によって隣りあう土石流止め工１，１の間か
ら流出する土石や土砂の量を可及的に抑制して捕捉して
おくことができる。これによって土石流止め工１に多量
の土石が堆積しても各土石流止め工間の隙間を利してス
リットダムとしても機能させることができるようにな
る。従って、土石流止め工１を接触するようにして配置
する必要もなくなり、土石流止め工の使用数の低減すな
わち使用鋼管量の節減も図られる。If the interval S of the debris flow stop 1 is within 1.5 times the maximum diameter D of the inflowing gravel stone 10 expected, the debris 10
It is possible to capture the amount of debris and sand flowing out from between the debris flow stoppers 1 and 1 that are adjacent to each other by suppressing the amount of debris and earth and sand as much as possible. As a result, even if a large amount of debris is deposited on the debris flow stop 1, it becomes possible to use the gap between the debris flow stop as a slit dam. Therefore, it is not necessary to dispose the debris flow stop 1 so as to contact it, and the number of debris flow stop used, that is, the amount of steel pipe used can be reduced.
【図１】 本発明に係る土石流止め工の斜視図。FIG. 1 is a perspective view of a debris flow stop according to the present invention.
【図２】 図１中のII−II線矢視図。FIG. 2 is a view taken along the line II-II in FIG.
【図３】 土石流止め工に堆積する土石等の様子を示す
概略図。FIG. 3 is a schematic view showing a state of debris and the like deposited on the debris flow stop work.
【図４】 異なる形状をした鋼管製櫓を採用した場合の
土石流止め工の側面図。FIG. 4 is a side view of a debris flow stopper when steel pipe slags having different shapes are adopted.
【図５】 複数の土石流止め工を河幅方向に並べた例の
概略平面図。FIG. 5 is a schematic plan view of an example in which a plurality of debris flow stop works are arranged in the river width direction.
１…土石流止め工、２…鋼管製ベッド、２Ｌ，２Ｒ…左
右側材、３…鋼管製櫓、３Ａ…鋼管格子、３Ｂ…門形構
造、３ｍ…鋼管製梁（連結部材）、３ｎ…鋼管製斜材
（連結部材）、５…鋼管杭、６…底面板、７…受圧フィ
ン、１０…流入礫石、Ｄ…流入礫石の最大径、Ｓ…土石
流止め工の間隔、Ｗ…土石流止め工の河幅方向の長さ。1 ... Debris flow stop, 2 ... Steel pipe bed, 2L, 2R ... Left and right side members, 3 ... Steel pipe slag, 3A ... Steel pipe grid, 3B ... Gate structure, 3m ... Steel pipe beam (connecting member), 3n ... Steel pipe Slanting material (connecting member), 5 ... Steel pipe pile, 6 ... Bottom plate, 7 ... Pressure receiving fin, 10 ... Inflow gravel stone, D ... Maximum diameter of inflow gravel stone, S ... Interval of debris flow stop work, W ... Debris flow stop work Length in the river width direction.
フロントページの続き (72)発明者 荒牧 浩 兵庫県神戸市中央区小野柄通７丁目１番１ 号 川鉄建材株式会社内 (72)発明者 山口 聖勝 兵庫県神戸市中央区小野柄通７丁目１番１ 号 川鉄建材株式会社内 (72)発明者 打荻 珠男 東京都新宿区市谷砂土原町三丁目４番地 財団法人砂防・地すべり技術センター内 (72)発明者 阿部 宗平 東京都新宿区市谷砂土原町三丁目４番地 財団法人砂防・地すべり技術センター内 (72)発明者 水山 高久 大阪府茨木市新庄町３−14Front page continuation (72) Inventor Hiroshi Aramaki 7-1-1, Onoedori, Chuo-ku, Kobe-shi, Hyogo Within Kawatetsu Construction Materials Co., Ltd. (72) Seikatsu Yamaguchi, 7-chome, Onoedori, Chuo-ku, Kobe-shi, Hyogo 1-1 No. 1 Kawatetsu Kenzai Co., Ltd. (72) Inventor Tamao Uchigi 3-4 Ichigaya Sadohara-cho, Shinjuku-ku, Tokyo Inside Sabo / Landslide Technology Center (72) Inoue Sohei Abe Sohei Ichigaya, Shinjuku-ku, Tokyo 3-4 Tsuchihara-cho, Sabo and Landslide Technology Center (72) Inventor Takahisa Mizuyama 3-14 Shinjo-cho, Ibaraki-shi, Osaka
Claims (7)
動きを抑止する底面板が取りつけられると共に、土中埋
設部分の周囲に受働土圧を増大させて滑り抵抗を付加す
る受圧フィンが固定されている土石流止め工において、 前記底面板と受圧フィンとを備える幾本かの鋼管杭を下
面に備え、河床面に略平行となるように埋設されて土石
流の方向へ延びる鋼管製ベッドと、 該鋼管製ベッドの下流部分に乗載固定され、下部分を前
記鋼管製ベッドと共に埋設した状態で土石流に対面する
ように設置される鋼管製櫓と、 を備えて土石流止め工を形成し、該鋼管製櫓の柱は前記
鋼管製ベッドの左右側材をなす長尺鋼管に立設され、そ
の鋼管製櫓の下流側部分には透水させると共に土石流を
せき止める鋼管格子が形成される一方、上流側部分は土
石流が鋼管製ベッド上を移動して前記鋼管格子へ到るの
を可能とする門形構造となっており、前記鋼管製ベッド
は前記鋼管格子の高さまで土石等が堆積しても土石流止
め工を流失・転倒させることのない量の土砂を乗載する
ことができる長さに選定されていることを特徴とする土
石流止め工。1. A bottom plate for restraining the movement of the steel pipe by utilizing the weight of the top-loaded earth and sand is attached to the lower end of the steel pipe, and a pressure-receiving fin for increasing the passive earth pressure and adding a slip resistance is provided around the portion buried in the soil. In the fixed debris flow stopper, the bottom plate is provided with some steel pipe piles including the bottom plate and the pressure-receiving fins, and the steel pipe bed is embedded so as to be substantially parallel to the riverbed surface and extends in the direction of the debris flow. A steel pipe turret that is mounted and fixed on a downstream portion of the steel pipe bed and is installed so as to face the debris flow in a state where the lower portion is embedded together with the steel pipe bed, and forms a debris flow stopper, The pillars of the steel pipe turret are erected on long steel pipes that form the left and right side members of the steel pipe bed, and a steel pipe grid is formed in the downstream side portion of the steel pipe turret to prevent water and debris flow while being upstream. Debris flow on the side It has a gate-shaped structure that allows it to move on the steel pipe bed to reach the steel pipe grid, and the steel pipe bed has washed away debris flow stop works even if debris, etc., accumulated up to the height of the steel pipe grid.・ Debris flow stop work characterized by being selected to have a length that can carry an amount of earth and sand that will not fall.
石の最大径の少なくとも３倍の幅に選定されていること
を特徴とする請求項１に記載された土石流止め工。2. The debris flow stop according to claim 1, wherein the debris flow stop is selected to have a width at least three times the maximum diameter of the expected inflow gravel.
するとき、隣りあう土石流止め工の間隔は、予想される
流入礫石の最大径の１．５倍以内となっていることを特
徴とする請求項１又は請求項２に記載された土石流止め
工。3. When a plurality of the debris flow stop works are arranged in the river width direction, the interval between the debris flow stop works adjacent to each other is within 1.5 times the expected maximum diameter of the inflowing gravel stones. The debris flow stop work according to claim 1 or claim 2.
していることを特徴とする請求項１ないし請求項３のい
ずれかに記載された土石流止め工。4. The debris flow stop work according to any one of claims 1 to 3, wherein the steel pipe turret has a substantially trapezoidal shape when viewed from a side surface.
していることを特徴とする請求項１ないし請求項３のい
ずれかに記載された土石流止め工。5. The debris flow stop work according to any one of claims 1 to 3, wherein the steel pipe turret has a triangular shape when viewed from the side.
先端部分、前記鋼管製櫓の上流側部分の前記門形構造の
脚部の直下及び下流側部分の前記鋼管格子の脚部の直下
に配置されていることを特徴とする請求項１ないし請求
項５のいずれかに記載された土石流止め工。6. The steel pipe pile includes an upstream end portion of the steel pipe bed, an upstream portion of the steel pipe turret, directly below a leg portion of the gate structure, and a downstream portion of the steel pipe lattice directly below a leg portion of the steel pipe lattice. The debris flow stop work according to any one of claims 1 to 5, wherein the debris flow stop works.
積土砂・礫石の流失を抑制する鋼管製梁や鋼管製斜材が
取りつけられていることを特徴とする請求項１ないし請
求項６のいずれかに記載された土石流止め工。7. A steel pipe beam or a steel pipe diagonal member is attached to the side surface of the steel pipe slag for reinforcement and for suppressing the loss of accumulated sediment and gravel stones. Debris flow stop work described in any of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07349117A JP3087260B2 (en) | 1995-12-19 | 1995-12-19 | Debris stop work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP07349117A JP3087260B2 (en) | 1995-12-19 | 1995-12-19 | Debris stop work |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09170218A true JPH09170218A (en) | 1997-06-30 |
| JP3087260B2 JP3087260B2 (en) | 2000-09-11 |
Family
ID=18401610
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP07349117A Expired - Lifetime JP3087260B2 (en) | 1995-12-19 | 1995-12-19 | Debris stop work |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3087260B2 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006052540A (en) * | 2004-08-10 | 2006-02-23 | Jfe Metal Products & Engineering Inc | Permeable debris barrier and method for capturing gravel |
| KR100747434B1 (en) * | 2006-08-25 | 2007-08-08 | 주식회사 동진이엔지 | Equipment prevention of floods for small-river |
| KR100879973B1 (en) * | 2008-07-28 | 2009-01-23 | 대한민국 | Beamcreen rhombic dam |
| KR100890836B1 (en) * | 2007-08-27 | 2009-03-30 | (주)대흥이엔지 | A Slit Debris Barrier |
| CN105350444A (en) * | 2015-10-30 | 2016-02-24 | 中国电建集团成都勘测设计研究院有限公司 | Pipe bridge protective structure for debris flow high-incidence area |
| JP2017101502A (en) * | 2015-12-04 | 2017-06-08 | 日鐵住金建材株式会社 | Steel slit dam |
| CN113981908A (en) * | 2021-09-13 | 2022-01-28 | 四川省公路规划勘察设计研究院有限公司 | Debris flow accumulation body discharging and guiding structure |
| CN114892593A (en) * | 2022-06-01 | 2022-08-12 | 清华大学 | Bionic energy dissipation and disaster reduction structural unit |
| CN114991068A (en) * | 2022-06-14 | 2022-09-02 | 广西建工第五建筑工程集团有限公司 | Triangular built-in flood drainage and drainage triangular structure system and construction method thereof |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4999657B2 (en) * | 2007-11-22 | 2012-08-15 | Ｊｆｅ建材株式会社 | Driftwood capture structure |
| JP4912348B2 (en) * | 2008-03-31 | 2012-04-11 | 財団法人砂防・地すべり技術センター | Sediment capture structure and sabo dam |
| KR101647297B1 (en) * | 2015-03-19 | 2016-08-10 | 하진석 | Changable chair between lifesaving floater and life vest |
| JP6785056B2 (en) * | 2015-10-06 | 2020-11-18 | Ｊｆｅ建材株式会社 | Installation method of capture body and dam structure |
-
1995
- 1995-12-19 JP JP07349117A patent/JP3087260B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006052540A (en) * | 2004-08-10 | 2006-02-23 | Jfe Metal Products & Engineering Inc | Permeable debris barrier and method for capturing gravel |
| KR100747434B1 (en) * | 2006-08-25 | 2007-08-08 | 주식회사 동진이엔지 | Equipment prevention of floods for small-river |
| KR100890836B1 (en) * | 2007-08-27 | 2009-03-30 | (주)대흥이엔지 | A Slit Debris Barrier |
| KR100879973B1 (en) * | 2008-07-28 | 2009-01-23 | 대한민국 | Beamcreen rhombic dam |
| CN105350444A (en) * | 2015-10-30 | 2016-02-24 | 中国电建集团成都勘测设计研究院有限公司 | Pipe bridge protective structure for debris flow high-incidence area |
| JP2017101502A (en) * | 2015-12-04 | 2017-06-08 | 日鐵住金建材株式会社 | Steel slit dam |
| CN113981908A (en) * | 2021-09-13 | 2022-01-28 | 四川省公路规划勘察设计研究院有限公司 | Debris flow accumulation body discharging and guiding structure |
| CN113981908B (en) * | 2021-09-13 | 2023-09-22 | 四川省公路规划勘察设计研究院有限公司 | Chip flow accumulation body drainage structure |
| CN114892593A (en) * | 2022-06-01 | 2022-08-12 | 清华大学 | Bionic energy dissipation and disaster reduction structural unit |
| CN114892593B (en) * | 2022-06-01 | 2023-10-27 | 清华大学 | Bionic energy dissipation and disaster reduction structural unit |
| CN114991068A (en) * | 2022-06-14 | 2022-09-02 | 广西建工第五建筑工程集团有限公司 | Triangular built-in flood drainage and drainage triangular structure system and construction method thereof |
| CN114991068B (en) * | 2022-06-14 | 2023-10-24 | 广西建工第五建筑工程集团有限公司 | Triangular built-in flood drainage triangular structure system and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3087260B2 (en) | 2000-09-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5697736A (en) | Seawalls and shoreline reinforcement systems | |
| US9644334B2 (en) | Methods of and systems for controlling water flow, breaking water waves and reducing surface erosion along rivers, streams, waterways and coastal regions | |
| US8177457B2 (en) | Pipeline protection and levee module system | |
| US5252002A (en) | Natural bottom culvert and method for installation | |
| JPH09170218A (en) | Debris flow stopping frame | |
| JP7118709B2 (en) | Weirs and traps | |
| KR101017295B1 (en) | Hybrid type safety structure for preventing falling rocks | |
| JP2002339338A (en) | Capturing construction for catching flow-down matters | |
| JP2007177467A (en) | Debris flow blocking work and its construction method | |
| JPH0782725A (en) | Permeable erosion control weir levee | |
| RU2321701C2 (en) | Weir construction method | |
| JP2002105931A (en) | Passing type dam unit and dam | |
| JP2608018B2 (en) | Transmission type driftwood generation control | |
| CA2225729C (en) | Arch bridge for water crossing | |
| CN210737555U (en) | Underground pipeline in-situ protection mechanism for foundation pit supporting system | |
| JP7112875B2 (en) | Weirs and traps | |
| JP2003313852A (en) | Steel frame weir bank | |
| JP3662186B2 (en) | Transmission type dam unit and transmission type dam | |
| JP2003138545A (en) | Permeable type check dam | |
| CN219992388U (en) | Be applied to simple and easy dirt blocking dam in mountain area nature river course | |
| JP2020117962A (en) | Levee body seepage destruction suppression structure | |
| CN215925986U (en) | Protection architecture under influence of adjacent underground works of existing tunnel | |
| JP7214904B2 (en) | Weirs and traps | |
| CN218322781U (en) | Foundation pit supporting structure of existing pipeline | |
| CN211816340U (en) | Riverway slope protection cofferdam structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20000623 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090714 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090714 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100714 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100714 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110714 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110714 Year of fee payment: 11 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110714 Year of fee payment: 11 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120714 Year of fee payment: 12 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130714 Year of fee payment: 13 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |