JPH0762664A - Method for protecting steep slope face of water reservoir pond - Google Patents
Method for protecting steep slope face of water reservoir pondInfo
- Publication number
- JPH0762664A JPH0762664A JP20808193A JP20808193A JPH0762664A JP H0762664 A JPH0762664 A JP H0762664A JP 20808193 A JP20808193 A JP 20808193A JP 20808193 A JP20808193 A JP 20808193A JP H0762664 A JPH0762664 A JP H0762664A
- Authority
- JP
- Japan
- Prior art keywords
- steep slope
- pond
- slope
- woven fabric
- water reservoir
- 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
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Revetment (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は湛水池の急勾配法面防護
方法に関し、更に詳細には揚水発電所の上池、下池等の
ように、水位が大きく変動する環境下にある湛水池の急
勾配法面防護方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steep slope protection method for a submerged pond, and more particularly, it relates to a submerged pond in an environment where the water level fluctuates greatly, such as the upper and lower ponds of a pumped storage power plant. Regarding steep slope protection method.
【０００２】[0002]
【従来の技術】従来、揚水発電所用の上池等のような湛
水池等では、１日の内に水位が２０ｍも上下することが
ある。このような水位の大きな変動が繰り返し起こる
と、湛水池等の法面に残留水圧が生じ、背面地山土粒子
の結合力を弱め、その結果土粒子が抜け出したり、冬期
は凍結や融解による風化が生じる等して、法面の肌落ち
即ち崩壊が発生する。2. Description of the Related Art Conventionally, in a flooded pond such as the upper pond for a pumped storage power plant, the water level may rise and fall by as much as 20 m within a day. When such a large fluctuation of water level occurs repeatedly, residual water pressure is generated on the slope of the submerged pond, weakening the binding force of the soil particles in the back ground, resulting in the soil particles slipping out, and weathering due to freezing or thawing in winter. As a result, the slope of the slope, that is, collapse, occurs.
【０００３】そこで、従来のこの種の湛水池等の法面に
は、図６に示されるように、ロックフイルダム裏面処理
と同様な方法即ち法面地山１表面に小礫２から大礫３の
粒径を有するフイルターを配し、その上に大石のリップ
ラップ４を配置してなる張石構造の防護工即ち防護方法
が図られ、水抜きと土粒子流出防止がなされていた。Therefore, as shown in FIG. 6, the slope of a conventional pond such as a pond is treated in the same manner as the backside treatment of a rock fil dam, that is, small gravel 2 to large gravel 3 on the surface of the slope ground 1. A filter having a particle size of 4 was arranged, and a large stone lip wrap 4 was arranged on the filter to protect the stone structure, that is, prevent water from draining and soil particles from flowing out.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
張石構造からなる法面防護工は、機能的には非常に望ま
しいものであるが、この防護工は法面の勾配がｉ＝１：
１．０より緩い場合に適用可能であって、ｉ≦１．０の
急勾配には施工不可能なため不適当であった。従って、
このような急勾配法面に対して試みられた従来の被覆工
などの防護工としては、全面張りコンクリート、吹付け
モルタル等の表面被覆工法等が知られている。However, the conventional slope protector consisting of a gantry structure is highly desirable in terms of function, but the slope slope of this protector is i = 1: 1.
It is applicable when it is less than 1.0, and is not suitable because it cannot be applied to a steep gradient of i ≦ 1.0. Therefore,
As a protective work such as a conventional coating work attempted against such a steep slope surface, a surface coating construction method such as full-faced concrete or spray mortar is known.
【０００５】しかし、これらの被覆防護工の場合、極く
僅かな隙間やクラックが生じると、そこから少量の土粒
子流出が発生し、それが拡大して背面地山に空洞を生
じ、ついには崩落に至ると言う現象、即ち防護工背面地
山の抜け出しが主原因となって崩落すると言う問題があ
った。However, in the case of these cover protectors, when a very small gap or crack is generated, a small amount of soil particles flow out, which expands to form a cavity in the back ground and finally, There was a problem that the collapse occurred, that is, the collapse was mainly caused by the escape of the back ground of the protection work.
【０００６】本発明の目的は、かかる従来の問題点を解
決するためになされたもので、水位の変化が繰り返し起
こり且つその変化量が比較的に大きい湛水池等の急勾配
法面において、施工が可能で且つ法面地山の崩落をほぼ
完全に防止し得る防護方法を提供することにある。The object of the present invention is to solve the above-mentioned conventional problems, and to carry out construction on a steep slope of a flooded pond or the like in which water level changes repeatedly and the amount of change is relatively large. It is to provide a protection method which can prevent the collapse of the slope and the ground almost completely.
【０００７】[0007]
【課題を解決するための手段】本発明は湛水池等の急勾
配法面防護方法であり、前述した技術的課題を解決すべ
く以下のように構成されている。すなわち、本発明の湛
水池等の急勾配法面防護方法は、湛水池等の急勾配法面
地山１１全面に不織布１３を敷き、この上に鉄筋コンク
リートとアンカー１７とによりフリーフレーム１５を設
置し、このフリーフレーム１５枠内の前記不織布１３上
に、伸長性及び耐候性のある高引張強度材料の網袋２２
に礫を詰めたグラベルマット１８を配置して覆工するこ
とを特徴とする。The present invention is a steep slope protection method for a pond and the like, and is configured as follows to solve the above-mentioned technical problems. That is, the steep slope protection method for a flooded pond or the like of the present invention is such that a non-woven fabric 13 is laid on the entire surface of a steep slope slope 11 such as a flooded pond, and a free frame 15 is installed on this by reinforced concrete and anchors 17. On the non-woven fabric 13 in the frame of the free frame 15, a mesh bag 22 made of a high tensile strength material having stretchability and weather resistance.
The gravel mat 18 filled with gravel is placed and lined.
【０００８】[0008]
【作用】本発明における湛水池等の急勾配法面防護方法
によると、繰り返し上下する水位変動に対して、不織布
１３は透水性を有すると共に土粒子の通過を阻止するこ
とから、不織布１３背面の残留水は抜け、また土粒子の
流出は阻止される。According to the steep slope protection method for a flooded pond or the like according to the present invention, the nonwoven fabric 13 has water permeability and prevents the passage of soil particles against repeated fluctuations of the water level. Residual water will escape and soil particles will be prevented from flowing out.
【０００９】他方、フリーフレーム１５とその枠内の覆
工とは、不織布１３を覆ってその全面に分布荷重を及ぼ
す働きをし、残留水圧を生じた場合の排水作用を助ける
と共に法面地山１１と不織布１３との間に空隙の発生を
妨いで土粒子の動きを止め、また冬期には法面１１の凍
結を抑え、法面の風化を防ぐ。On the other hand, the free frame 15 and the lining in the frame serve to cover the non-woven fabric 13 and exert a distributed load on the entire surface thereof to assist the drainage action when residual water pressure is generated and also to the slope slope. It prevents the generation of voids between 11 and the non-woven fabric 13 to stop the movement of soil particles, and also suppresses the freezing of the slope 11 in winter to prevent the slope from weathering.
【００１０】[0010]
【実施例】以下、本発明における湛水池等の急勾配法面
防護方法を図に示された実施例について更に詳細に説明
する。図１ないし図５には本発明の一実施例に係る湛水
池等の急勾配法面防護方法によって構成された湛水池の
急勾配法面防護構造１０が示されている。The following is a more detailed description of the steep slope protection method for a flooded pond according to the present invention with reference to the embodiments shown in the drawings. 1 to 5 show a steep slope protection structure 10 for a flood pond constructed by a steep slope protection method for a flood pond according to an embodiment of the present invention.
【００１１】この実施例の急勾配法面防護方法では、最
初に、草、木等を伐採したり、切土として掘削され整形
された法面地山１１に、フリーフレーム用の溝１２を格
子状に掘削する。その後、その全表面に図２に示される
ようにポリプロピレン、ポリエステル等の合成高分子材
料を原料として形成された不織布１３が適当なずれ止め
を打ちながら敷かれる。In the steep slope protection method according to this embodiment, first, grass, trees, etc. are cut down, or a slope 12 for free frame is formed on a slope 11 which is excavated as cut soil and shaped. Excavate into a shape. After that, as shown in FIG. 2, a non-woven fabric 13 formed from a synthetic polymer material such as polypropylene or polyester as a raw material is laid on the entire surface thereof while appropriately preventing slippage.
【００１２】次いで、フリーフレーム用の溝１２におい
て、不織布１３上に鉄筋を組み立て、吹付けコンクリー
ト用型枠を設置してこの型枠内へ吹付けコンクリート１
４を打ち込んでフリーフレーム１５を形成する。そし
て、コンクリート強度の発現後にフリーフレーム１５の
交差部１６にアンカー１７を打設して法面地山１１に設
置固定する。Next, in the groove 12 for the free frame, the reinforcing bars are assembled on the non-woven fabric 13, the formwork for shotcrete is installed, and the shotcast concrete 1 is placed in this formwork.
4 is driven to form the free frame 15. Then, after the concrete strength is developed, an anchor 17 is driven at the intersection 16 of the free frame 15 to set and fix it on the slope 11.
【００１３】その後、予め製作されている多数のグラベ
ルマット１８を図３及び図４の部分的拡大図に示される
ようにフレーム枠内の不織布１３上に並べて配置（フレ
ーム枠内覆工）し、各グラベルマット１８の上端に取り
付けたフック１９とフリーフレーム１５に取り付けたフ
ック２０とを鎖２１で連結して支持する。Thereafter, a large number of pre-fabricated gravel mats 18 are arranged side by side on the nonwoven fabric 13 in the frame frame (lining in the frame frame) as shown in the partially enlarged views of FIGS. 3 and 4. A hook 19 attached to the upper end of each gravel mat 18 and a hook 20 attached to the free frame 15 are connected and supported by a chain 21.
【００１４】ところで、グラベルマット１８は、ポリエ
チレン等の高分子材料を原料とするジオグリッド等の伸
長性、耐候性に優れ、高引張強度のある包括材料による
網目状袋２２に礫を詰めたふとん状のものを言う。これ
らのグラベルマット１８は急斜面に置くため、中のグラ
ベルが下方に移動しないように中間の数カ所で縛られて
いる。By the way, the gravel mat 18 is a futon in which a mesh bag 22 made of a high-strength entrapping material such as geogrid made of a polymer material such as polyethylene is excellent in extensibility and weather resistance and is filled with gravel. Say something like a shape. Since these gravel mats 18 are placed on a steep slope, they are bound at several places in the middle so that the inside gravel does not move downward.
【００１５】このような湛水池等の急勾配法面防護方法
によると、繰り返し上下する水位変動に対して法面地山
１１全面に敷かれた不織布１３は、透水性を有するが土
粒子の通過を阻止する機能を備えていることから、水位
の降下に伴って不織布１３背面の残留水は抜けるが土粒
子の流出を防止することができる。そして、フリーフレ
ーム１５とフレーム枠内覆工とは不織布を覆うと共に全
面に分布荷重としての働きをし、残留圧を生じた場合の
排水作用を助けると共に法面地山１１と不織布１３との
間に空隙の発生を防ぎ、土粒子の動きを止める。また、
冬期には法面の凍土を抑え、法面の風化作用を防ぐ。According to the steep slope protection method for such a pond, the non-woven fabric 13 laid on the entire slope 11 is permeable to the fluctuation of the water level, but the soil particles pass through. Since the residual water on the back surface of the non-woven fabric 13 escapes as the water level drops, the outflow of soil particles can be prevented. The free frame 15 and the inner frame lining cover the non-woven fabric and also serve as a distributed load over the entire surface to assist the drainage action when residual pressure is generated and between the slope 11 and the non-woven fabric 13. Prevents the generation of voids and stops the movement of soil particles. Also,
In winter, it controls the frozen soil on the slope and prevents weathering on the slope.
【００１６】特に、フリーフレーム１５における枠内覆
工即ちグランベルマット１８は、その柔軟な構造から、
フリーフレーム１５の枠内四角形スペースの法面に対し
て下方の不織布１３と一体となって前述した分布荷重の
働きをし、且つ残留水圧による変形（膨れ上がり）を可
能にすると共にこの変形を戻す力（分布荷重）となって
おり、冬期の凍土作用による地山のはらみに対抗する力
を有する。In particular, the inner frame lining of the free frame 15, that is, the granbell mat 18, is
The above-mentioned non-woven fabric 13 is integrated with the lower surface of the quadrangular space in the frame of the free frame 15 so as to function as the above-mentioned distributed load, and enables deformation (swelling) due to residual water pressure and restores this deformation. It is a force (distributed load), and has the force to counteract the freezing of the ground caused by frozen soil in winter.
【００１７】言い換えれば、法面地山に対する覆工の役
割である土粒子流出防止効果のためには不織布１３と法
面地山１１とが常に接していることが要求され、フリー
フレーム１５枠内のグラベルマット１８はその変形能力
と分布荷重とによりその役目を果たしている。In other words, it is required that the nonwoven fabric 13 and the sloped ground 11 are always in contact with each other in order to prevent the outflow of soil particles, which is the role of the lining against the sloped ground, and the inside of the free frame 15 The gravel mat 18 of FIG. 6 plays its role by its deformability and distributed load.
【００１８】[0018]
【発明の効果】以上説明したように、本発明の湛水池等
の急勾配法面防護方法によれば、水位の変化が繰り返し
起こり且つその変化量が比較的に大きい湛水池等の急勾
配法面に対して、防護工背面地山の抜け出しによる地山
の崩落を長期に亘りほぼ完全に防ぐことができ、その結
果再施工等の問題の発生もなくなり、その費用と時間の
浪費がなく非常に経済的となると共に地山崩落による美
観上の問題も解決することができる。As described above, according to the steep slope protection method for a flooded pond or the like of the present invention, a steep slope method for a flooded pond or the like in which water level changes repeatedly and the amount of change is relatively large. On the other hand, it is possible to prevent the collapse of the ground due to the escape of the back ground from the protective work almost completely for a long period of time, and as a result, the problems such as re-construction will not occur and the cost and time will not be wasted. It is economical and can solve aesthetic problems caused by the collapse of natural ground.
【図１】本発明の一実施例に係る湛水池等の急勾配法面
防護方法によって構成された湛水池の急勾配法面防護構
造を部分的に示す平面図である。FIG. 1 is a plan view partially showing a steep slope protection structure for a flood pond constructed by a steep slope protection method for a flood pond according to an embodiment of the present invention.
【図２】図１に示される湛水池の急勾配法面防護構造を
２―２線に沿って切断して示す断面図である。FIG. 2 is a cross-sectional view showing the steep slope slope protection structure of the water pond shown in FIG. 1 taken along line 2-2.
【図３】図１に示される湛水池の急勾配法面防護構造の
一部を拡大して示す部分的な平面図である。FIG. 3 is a partial plan view showing, on an enlarged scale, a part of the steep slope protection structure for the water pond shown in FIG.
【図４】図３に示される湛水池の急勾配法面防護構造を
４―４線に沿って切断して示す断面図である。FIG. 4 is a cross-sectional view showing the steep slope protection structure for the flooded pond shown in FIG. 3, taken along line 4-4.
【図５】図３に示される湛水池の急勾配法面防護構造を
５―５線に沿って切断して示す断面図である。5 is a cross-sectional view showing the steep slope protection structure for the flooded pond shown in FIG. 3, taken along line 5-5.
【図６】従来の湛水池等の法面防護構造を示す部分的な
断面図である。FIG. 6 is a partial cross-sectional view showing a conventional slope protection structure such as a pond.
１０ 湛水池の急勾配法面防護構造 １１ 法面地山 １２ フリーフレーム用溝 １３ 不織布 １４ コンクリート １５ フリーフレーム １６ フリーフレームの交差部 １７ アンカー １８ グラベルマット １９ フック ２０ フック ２１ 連結用の鎖 ２２ ジオグリッド網 10 Steep slope slope protection structure for flooded ponds 11 Slope ground 12 Free frame grooves 13 Nonwoven fabric 14 Concrete 15 Free frame 16 Free frame intersections 17 Anchors 18 Gravel mats 19 Hooks 20 Hooks 21 Chains for connection 22 Geogrid network
Claims (1)
を敷き、この上に鉄筋コンクリートとアンカーとにより
フリーフレームを設置し、このフリーフレームの枠内の
前記不織布上に、伸長性及び耐候性のある高引張強度材
料の網袋に礫を詰めたグラベルマットを配置して覆工す
ることを特徴とする湛水池の急勾配法面防護方法。1. A non-woven fabric is laid on the whole surface of a steep slope ground such as a pond, and a free frame is installed by reinforced concrete and anchors on the non-woven fabric. A steep slope protection method for a flooded pond, which is characterized by placing a gravel mat filled with gravel in a net bag of weatherproof high tensile strength material and lining it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20808193A JPH0762664A (en) | 1993-08-23 | 1993-08-23 | Method for protecting steep slope face of water reservoir pond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20808193A JPH0762664A (en) | 1993-08-23 | 1993-08-23 | Method for protecting steep slope face of water reservoir pond |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0762664A true JPH0762664A (en) | 1995-03-07 |
Family
ID=16550331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20808193A Pending JPH0762664A (en) | 1993-08-23 | 1993-08-23 | Method for protecting steep slope face of water reservoir pond |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0762664A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195978A (en) * | 2014-09-15 | 2014-12-10 | 中国科学院重庆绿色智能技术研究院 | Ecological restoration and water-soil conservation method for wide gentle-slope hydro-fluctuation belt in large-scale water projects |
-
1993
- 1993-08-23 JP JP20808193A patent/JPH0762664A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104195978A (en) * | 2014-09-15 | 2014-12-10 | 中国科学院重庆绿色智能技术研究院 | Ecological restoration and water-soil conservation method for wide gentle-slope hydro-fluctuation belt in large-scale water projects |
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