JPH03287908A - Structure of debris barrier - Google Patents
Structure of debris barrierInfo
- Publication number
- JPH03287908A JPH03287908A JP8904890A JP8904890A JPH03287908A JP H03287908 A JPH03287908 A JP H03287908A JP 8904890 A JP8904890 A JP 8904890A JP 8904890 A JP8904890 A JP 8904890A JP H03287908 A JPH03287908 A JP H03287908A
- Authority
- JP
- Japan
- Prior art keywords
- water
- dam
- soil
- dam body
- sand
- 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.)
- Pending
Links
- 230000004888 barrier function Effects 0.000 title 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 38
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 15
- 239000013049 sediment Substances 0.000 claims description 23
- 230000003628 erosive effect Effects 0.000 claims description 11
- 238000000926 separation method Methods 0.000 claims description 8
- 239000004576 sand Substances 0.000 abstract description 8
- 239000002689 soil Substances 0.000 abstract description 6
- 239000004575 stone Substances 0.000 abstract description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、大雨等により発生する傾斜面の土砂合流水に
よる災害を防止するために構築される砂防ダムの構造に
係るものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the structure of an erosion control dam constructed to prevent disasters caused by confluence of soil and water on slopes caused by heavy rain or the like.
（従来の技術）
従来の砂防ダムは第５図及び第６図に示すように、本ダ
ム堤体（ａ）における垂直、水平両方に亘って所定間隔
毎に小口径の水抜孔（ｂ）を設置して、上流側からの土
砂合流水（Ｃ）を、前記水抜孔（ｂ）を介して下流側に
放流するように槽底されている。(Prior art) As shown in Figures 5 and 6, conventional erosion control dams have small-diameter drainage holes (b) at predetermined intervals both vertically and horizontally in the dam body (a). The tank bottom is installed so that the combined earth and sand water (C) from the upstream side is discharged to the downstream side through the drain hole (b).
図中（イ）は副ダム堤体、（ｅ）は土砂である。In the figure, (a) is the secondary dam body, and (e) is the earth and sand.
（発明が解決しようとする課題）
前記従来の砂防ダムにおいては、本ダム堤体（ａ）の上
流側に土砂（ｅ）が堆積する前は、水抜孔０）が小口径
のために、大雨等による土砂合流水（Ｃ）を下流側に急
速に放流することができず、水頭が上がり、堤体に水圧
がかかる。(Problem to be Solved by the Invention) In the conventional erosion control dam, before the sediment (e) is deposited on the upstream side of the main dam body (a), the drainage hole 0) has a small diameter, so it is difficult to avoid heavy rain. The combined sediment water (C) due to the above cannot be rapidly discharged downstream, and the water head rises, putting water pressure on the embankment body.
また本ダム堤体（ａ）の上流側に土砂（ｅ）が堆積した
場合、下部の水抜孔（ｂ）が閉塞して下流側への放流を
阻害し、また堆積土砂（ｅ）は水切りが悪く安定せず、
本ダム堤体（ａ）へ土圧や水圧がかかり、同堤体の構造
が大型化し、構築費や維持費が嵩む。In addition, if sediment (e) accumulates on the upstream side of the dam body (a), the drain hole (b) at the bottom will become clogged, obstructing the discharge to the downstream side, and the accumulated sediment (e) will not drain properly. bad and unstable,
Earth pressure and water pressure will be applied to the dam body (a), making the structure of the dam body larger and increasing construction and maintenance costs.
本発明は前記従来技術の有する問題点に鑑みて提案され
たもので、その目的とする処は、本ダム堤体の上流側の
土砂合流水の急速な放流が行なわれ、下流側への土砂の
流出量が減少される砂防ダムを提供する点にある。The present invention has been proposed in view of the problems of the prior art described above, and its purpose is to rapidly discharge the combined sediment water on the upstream side of the dam body, and to dissipate the sediment to the downstream side. The purpose of the present invention is to provide an erosion control dam that reduces the amount of runoff.
（課題を解決するための手段）
前記の目的を達成するため、本発明に係る砂防ダムは、
砂防ダムにおける本ダム堤体の上流側に土砂分離用集水
塔を配設するとともに、同集水塔の下部に前記本ダム堤
体を貫通する大口径の排水管を接続して構成されている
。(Means for Solving the Problem) In order to achieve the above object, the erosion control dam according to the present invention has the following features:
A water collection tower for sediment separation is disposed upstream of the main dam body in the erosion control dam, and a large diameter drainage pipe that penetrates the main dam body is connected to the lower part of the water collection tower.
（作用）
本発明によれば、砂防ダムの本ダム堤体の上流側の土砂
合流水は、同堤体の上流側に配設された集水基によって
土砂を分離されたのち、同集水塔の下部に接続され、且
つ前記堤体を貫通する大口径の排水管を介して同堤体の
下流側に放流され、前記堤体に対する土圧、水圧が低減
されるとともに、下流側への土砂の流出量も低減する。(Function) According to the present invention, the combined sediment water on the upstream side of the main dam body of an erosion control dam is separated from the sediment by the water collection base disposed upstream of the main dam body, and then separated from the sediment by the water collection tower. The water is discharged to the downstream side of the levee body through a large-diameter drainage pipe that is connected to the lower part of the levee body and penetrates the levee body, reducing earth pressure and water pressure on the levee body, and reducing sediment to the downstream side. It also reduces the amount of runoff.
（実施例） 以下本発明を図示の実施例について説明する。(Example) The present invention will be described below with reference to the illustrated embodiments.
（１）は砂防ダムの本ダム堤体で、同堤体（１）の上流
側に土砂分離用集水塔（２）が配設されている。(1) is the main dam body of the sabo dam, and a water collection tower (2) for sediment separation is installed on the upstream side of the dam body (1).
同集水塔（２）は第３図及び第４図に示すように、平端
部集水桝（３）の上部に、外周に金網（４）が張設され
た鋼製枠（５）が立設され、同集水桝（３）には同調製
枠（５）を貫通する有孔管（６）が連通し、鋼製枠（５
）内に砕石（７）が充填されている。As shown in Figures 3 and 4, the water collection tower (2) has a steel frame (5) with a wire mesh (4) stretched around its outer periphery that stands above the flat end water collection basin (3). A perforated pipe (6) passing through the water preparation frame (5) is connected to the water collection basin (3), and a steel frame (5) is connected to the water collection basin (3).
) is filled with crushed stone (7).
図中（８）は前記有孔管（６）の頂部に嵌装された透水
蓋である。In the figure, (8) is a water-permeable lid fitted onto the top of the perforated pipe (6).
前記集水桝（３）には大口径の排水管（９）が接続され
、同排水管（９）は前記堤体（１）を貫通している。A large-diameter drain pipe (9) is connected to the water collection basin (3), and the drain pipe (9) penetrates the embankment body (1).
図中（１０）は本ダム堤体（１）に設けられた排水孔、
（１１）は副ダム堤体である。In the figure (10) is a drainage hole provided in the main dam body (1).
(11) is the secondary dam body.
図示の実施例は前記したように構成されているので、本
ダム堤体（１）の上流側の土砂合流水（１２）は土砂分
離用集水塔（２）に集められ、同集水塔（２）に充填さ
れた砕石（７）によって土砂が分離された水が、集水桝
（３）から大口径の排水管（９）を経て、前記堤体（１
）の下流側に放流される。Since the illustrated embodiment is configured as described above, the combined sediment water (12) on the upstream side of the dam body (1) is collected in the sediment separation water collection tower (2), ) is filled with crushed stones (7) from which the earth and sand have been separated, and the water passes through the large-diameter drainage pipe (9) from the catchment basin (3) to the embankment body (1).
) is discharged downstream.
図中（１３）は堆積土砂である。(13) in the figure is the accumulated sediment.
（発明の効果）
本発明によれば前記したように、砂防ダムにおける本ダ
ム堤体の上流側に土砂分離用集水塔を配設するとともに
、同集水塔の下部に前記本ダム堤体を貫通する大口径の
排水管を接続したことによって、本ダム堤体の上流側に
土砂が堆積しても、同上流側の土砂合流水は集水基によ
って土砂と分離されて、流水のみを大口径の排水管を介
して急速に下流側に放流し、本ダム堤体への土庄、水圧
が低減され、本ダム堤体の構築費や維持費が大幅に節減
される。(Effects of the Invention) According to the present invention, as described above, a water collection tower for earth and sand separation is provided on the upstream side of the main dam body in an erosion control dam, and a water collection tower for sediment separation is provided at the lower part of the water collection tower through which the main dam body is penetrated. By connecting a large-diameter drainage pipe, even if sediment accumulates on the upstream side of the dam body, the confluent water on the upstream side is separated from the sediment by the collection base, and only the flowing water is transferred to the large-diameter drainage pipe. The water is rapidly discharged downstream through the drainage pipes, reducing soil pressure and water pressure on the dam body, and significantly reducing construction and maintenance costs for the dam body.
また下流側への土砂の流出量が減少することによって、
河川への土砂の流出量も減少する。In addition, by reducing the amount of sediment flowing downstream,
The amount of sediment flowing into rivers will also decrease.
第１図は本発明に係る砂防ダムの一実施例を示す縦断面
図、第２図はその平面図、第３図及び第４図は夫々土砂
分離用集水塔の縦断面図並に横断平面図、第５図及び第
６図は夫々従来の砂防ダムの縦断面図並に平面図である
。
（１）・・・本ダム堤体、 （２）・・・土砂分離用
集水塔、（９）−・・排水管。
第２図FIG. 1 is a vertical cross-sectional view showing one embodiment of the erosion control dam according to the present invention, FIG. 2 is a plan view thereof, and FIGS. 3 and 4 are a vertical cross-sectional view and a cross-sectional view of a water collection tower for sediment separation, respectively. 5 and 6 are a longitudinal sectional view and a plan view, respectively, of a conventional erosion control dam. (1)... Main dam body, (2)... Sediment separation water collection tower, (9)... Drainage pipe. Figure 2
Claims (1)
水塔を配設するとともに、同集水塔の下部に前記本ダム
堤体を貫通する大口径の排水管を接続してなることを特
徴とする砂防ダムの構造。A water collection tower for sediment separation is arranged on the upstream side of the main dam body of the sabo dam, and a large diameter drainage pipe that penetrates the main dam body is connected to the lower part of the water collection tower. The structure of the erosion control dam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8904890A JPH03287908A (en) | 1990-04-05 | 1990-04-05 | Structure of debris barrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8904890A JPH03287908A (en) | 1990-04-05 | 1990-04-05 | Structure of debris barrier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03287908A true JPH03287908A (en) | 1991-12-18 |
Family
ID=13960000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8904890A Pending JPH03287908A (en) | 1990-04-05 | 1990-04-05 | Structure of debris barrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03287908A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0649827A (en) * | 1992-06-12 | 1994-02-22 | Zeniya Kaiyo Service Kk | Water discharging device for checkdam |
| CN1320213C (en) * | 2005-09-28 | 2007-06-06 | 南京大学 | Sand-trap water-take dam |
-
1990
- 1990-04-05 JP JP8904890A patent/JPH03287908A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0649827A (en) * | 1992-06-12 | 1994-02-22 | Zeniya Kaiyo Service Kk | Water discharging device for checkdam |
| CN1320213C (en) * | 2005-09-28 | 2007-06-06 | 南京大学 | Sand-trap water-take dam |
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