KR101398915B1 - Reinforcement method for earthfill dam - Google Patents

Reinforcement method for earthfill dam Download PDF

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KR101398915B1
KR101398915B1 KR1020130101512A KR20130101512A KR101398915B1 KR 101398915 B1 KR101398915 B1 KR 101398915B1 KR 1020130101512 A KR1020130101512 A KR 1020130101512A KR 20130101512 A KR20130101512 A KR 20130101512A KR 101398915 B1 KR101398915 B1 KR 101398915B1
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dam
slope
filter material
filter
present
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KR1020130101512A
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Korean (ko)
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정규정
이종근
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이종근
정규정
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/02—Fixed barrages
    • E02B7/04—Dams across valleys
    • E02B7/06—Earth-fill dams; Rock-fill dams
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
    • E02B8/06—Spillways; Devices for dissipation of energy, e.g. for reducing eddies also for lock or dry-dock gates

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Revetment (AREA)

Abstract

The present invention relates to a maintenance method for an earthfill dam. The objective of the present invention is to suppress the loss of soil particles of a levee body (10) while securing smooth drainage by modifying the lower end of a slope of the downstream levee body (10) of an existing earthfill dam or the peripheral part of a buried through structure (40) such as a discharge pipe with a water permeable filter material (20) and forming a covering layer (30) on the corresponding slope part with riprap, rubble, or gabions. According to the method of the present invention, the loss of the soil particles in the levee body (10) can be effectively suppressed without extensive reconstruction or repair of the existing earthfill dam, thus securing the structural stability and durability of the levee body (10) and extending the available term of the levee.

Description

흙댐의 보강공법{REINFORCEMENT METHOD FOR EARTHFILL DAM}{REINFORCEMENT METHOD FOR EARTHFILL DAM}

본 발명은 흙댐(earthfill dam)의 유지보수 공법에 관한 것으로, 기설 흙댐의 하류측 제체(10) 사면 하단부 또는 방류관 등의 매설 관통구조물(40) 주변부를 투수성 필터재(20)로 개질(改質)한 후, 해당 부위 사면에 사석, 쇄석 또는 돌망태 등으로 피복층(30)을 구축함으로써, 원활한 배수성은 확보하면서도 제체(10) 토립자의 유실은 억제할 수 있도록 한 것이다.
The present invention relates to a method for maintenance of an earth dam dam and a method for repairing an earthfill dam by modifying a peripheral portion of a buried through structure 40 such as a lower end of a slope of a downstream side body 10 of a foundation dam or a discharge pipe by a permeable filter material 20 And the coating layer 30 is formed of stones, crushed stone, gabbros, or the like on the slope of the site, thereby ensuring smooth drainage and suppressing the loss of the grains of the grains 10.

토사(土砂)가 주 축제(築堤) 재료로 사용되어 구축되는 흙댐은 콘크리트에 비하여 단위중량이 작으므로 기초암반이 취약한 지점에도 축조가 가능한 장점이 있으며, 유연성 또한 상대적으로 우수하여 기초지반의 부등침하 또는 직접적인 물리적 타격에 대한 안정성이 양호한 장점이 있다.
The soil dam constructed by using soil as the main festival material has a small unit weight compared to concrete, so it can be constructed at the point where the foundation rock is weak, and the flexibility is also relatively good, Or good stability against direct physical strikes.

도 1은 전형적인 흙댐의 횡단면을 예시한 것으로, 도면상 점선으로 표시된 선은 제체(10)내 공극수의 가상 자유수면을 나타내는 침윤선(浸潤線)으로서, 정상적인 상태의 흙댐에서는 도 1의 상부 도면에서와 같은 단면이 형성된다.Figure 1 illustrates a cross section of a typical dirt dam wherein the line indicated by the dashed line is a line of infiltration that represents the imaginary free water surface of the void water in the body 10, The same cross section is formed.

즉, 흙댐은 역학적으로 완전한 불투수체로서 거동하는 것이 아니라, 일정량의 누수는 허용하되 제체(10)내 침윤선의 하강을 통하여 제체(10) 구조를 유지하는 것으로, 정상적인 상태의 흙댐에서는 도 1의 상부 도면에서와 같이, 제체(10) 내부에 형성되는 침윤선이 하류측으로 점차 하강하여 제체(10) 사면의 하류단 하측 지반으로 연결되며, 동 도면에 도시된 바와 같이 제체(10) 하류단에 투수성 여재(濾材)로 구성된 필터드레인(filter drain)(19)이 설치된 경우 필터드레인(19)을 통하여 소량의 물이 배출되게 된다.That is, the dirt dam does not behave as a complete impermeable body mechanically but allows a certain amount of water leakage and maintains the structure of the body 10 through the descent of the infiltration line in the body 10. In the normal state dirt dam, As shown in the upper drawing, the infiltration line formed in the vessel 10 gradually descends to the downstream side and is connected to the lower-side bottom ground of the slope of the vessel 10, and as shown in the figure, A small amount of water is discharged through the filter drain 19 when a filter drain 19 composed of a filtering material is installed.

그러나, 댐 축조후 시간이 경과함에 따라 도 1의 하부 도면에서와 같이, 침윤선이 상승하여 제체(10) 하류측 사면을 통한 누수가 발생될 수 있는데, 이는 제체(10)를 구성하는 토사 중 불투수성을 발현하는 점토질 토립자가 지속적으로 유실됨에 따라 제체(10)의 투수성이 미세하게나마 증가함으로 인한 것이며, 특히 이러한 현상은 제체(10)의 하류측 사면 하단부에 집중된다.However, as time elapses after the dam construction, as shown in the lower view of Fig. 1, the infiltration line may rise and water leakage may occur through the slope on the downstream side of the body 10, which is impervious Due to the continuous loss of the clayey soil particles expressing the clay material 10, which is concentrated on the downstream side of the slope of the downstream side of the body 10.

도 1의 하부 도면에서와 같이, 침윤선이 상승하여 침윤선의 말단부가 제체(10) 하류측 사면에 일단 노출되면 이후 제체(10)내 공극수의 유출 및 토립자의 동반 유출이 급격하게 가속되고, 이는 침윤선을 더욱 상승시키는 악순환이 발생되면서 제체(10)의 안정성을 심각하게 위협하게 된다.1, once the infiltration line has risen and the distal end of the infiltration line has once been exposed to the downstream slope of the body 10, the outflow of the pore water and the accompanying outflow of the body particles in the body 10 are then rapidly accelerated, The stability of the body 10 is seriously threatened.

또한, 도 4에서와 같이, 제체(10)를 횡단하여 관통하는 방류관 등의 매설 관통구조물(40)이 설치된 흙댐의 경우, 관통구조물(40)과 제체(10)간 접촉면이 공극수의 고속 배수로로서 작용함에 따라 관통구조물(40)의 제체(10) 하류측 노출부의 안정성이 심각하게 훼손되는 문제점이 있다.4, the contact surface between the penetrating structure 40 and the bellows 10 is a high-speed drainage pipe having a large number of voids. In the case of an earth dam having a through-hole penetrating structure 40 such as a discharge pipe penetrating across the bellows 10, The stability of the exposed portion on the downstream side of the body 10 of the penetrating structure 40 is severely damaged.

이렇듯, 흙댐의 토립자 유실은 댐 구조 안정성의 심각한 위험요소임에도 불구하고, 노후에 따른 불가피한 현상으로 치부되어 별다른 조치가 취해지지 않고 있는 실정이다.In this way, although the loss of soil particles in the dam dam is a serious risk factor for the stability of the dam structure, it is inevitable due to the old age that no measures have been taken.

특히, 우리나라의 경우 전국에 산재한 대부분의 농업용 저수지가 흙댐 형식으로 축조되었고, 이들 대부분이 이미 상당수준 노후된 상황인 바, 저수지 및 댐의 안정성 확보, 댐의 급격한 붕괴로 인한 하류지역 피해 예방 및 저수지의 안정적 운용을 통한 용수공급 능력 유지를 위하여 흙댐의 토립자 유실을 방지할 수 있는 방안이 절실하게 요구된다 할 수 있다.
In the case of Korea, most of the agricultural reservoirs scattered all over the country were constructed in the form of dirt dams. Most of them have already been considerably obsolete, and the stability of reservoirs and dams, the prevention of damage to downstream areas due to the sudden collapse of dams, In order to maintain the water supply capacity through stable operation, it is urgently required to prevent the loss of the soil particles of the dam dam.

본 발명은 전술한 문제점을 감안하여 창안된 것으로, 기설(旣設) 흙댐(earth dam)의 보강공법에 있어서, 흙댐의 하류측 제체(堤體)(10) 하단부를 절토하는 절토단계(S11)와, 절토단계(S11)에서 절토된 절토부에 투수성 입상체(粒狀體)인 필터재(20)를 포설한 후 정지(整地)하여 필터재(20)로 구성된 제체(10) 사면을 신설하는 성토단계(S21)와, 필터재(20)로 구성된 제체(10) 사면에 투수성 섬유제 시트인 필터시트(25)를 전개하는 전개단계(S31)와, 필터시트(25) 표면에 침식에 저항하는 피복층(30)을 구축하는 피복단계(S41)로 이루어짐을 특징으로 하는 흙댐의 보강공법이다.DISCLOSURE OF THE INVENTION It is an object of the present invention to provide a method of reinforcing an earth dam in an existing earth dam, comprising the steps of cutting a lower end portion of a downstream dam body 10, And a filter material 20 which is a water-permeable granular material is installed on the cut-out portion cut in the cutting step S11 and is then grounded to form a slope of the material 10 composed of the filter material 20 A developing step S31 for developing a filter sheet 25 which is a water-permeable fiber sheet on the slope of the article 10 composed of the filter material 20, And a covering step (S41) of constructing a covering layer (30) which is resistant to a crack.

또한, 제체(堤體)(10)를 횡단하여 관통하는 관통구조물(40)이 매설된 기설(旣設) 흙댐(earth dam)의 보강공법에 있어서, 관통구조물(40)의 하류측 노출부 주변 제체(10)에 관통구조물(40)과 평행한 굴착공을 관통구조물(40)에 밀착하여 천공하는 천공단계(S12)와, 천공된 굴착공에 투수성 입상체(粒狀體)인 필터재(20)를 충전하는 충전단계(S22)와, 필터재(20)가 충전된 관통구조물(40) 주변 굴착공 표면에 투수성 섬유제 시트인 필터시트(25)를 적층하는 적층단계(S32)와, 필터시트(25) 표면에 관통구조물(40)을 포위하는 피복층(30)을 구축하는 폐합단계(S42)로 이루어짐을 특징으로 하는 흙댐의 보강공법이다.
In the reinforcement method of an existing earth dam in which a penetrating structure 40 penetrating through a tethers 10 is embedded in the vicinity of the exposed portion on the downstream side of the penetrating structure 40, A drilling step (S12) of drilling a drilling hole parallel to the penetrating structure (40) to the through structure (40) in the body (10) A lamination step S32 for laminating a filter sheet 25 which is a water permeable fibrous sheet on the surface of the excavating hole around the penetrating structure 40 filled with the filter material 20 and a charging step S22 for charging the filter material 20, (S42) of constructing a covering layer (30) surrounding the penetrating structure (40) on the surface of the filter sheet (25).

본 발명을 통하여, 기설 흙댐의 대대적인 개축 또는 보수 없이도 제체(10)내 토립자 유실을 효과적으로 억제할 수 있으며, 이로써 제체(10)의 구조적 안정성 및 내구성을 확보하고 가용 연한을 연장하는 효과를 얻을 수 있다.
According to the present invention, it is possible to effectively suppress the loss of the soil particles in the body 10 without large-scale reconstruction or maintenance of the existing earth dam, thereby securing the structural stability and durability of the body 10 and extending the available softness have.

도 1은 흙댐의 횡단면도
도 2는 본 발명이 적용된 흙댐의 횡단면도
도 3은 본 발명의 수행과정 설명도
도 4는 관통구조물이 설치된 흙댐의 횡단면도
도 5는 본 발명이 적용된 관통구조물 설치 흙댐의 횡단면도
도 6은 도 5 실시예의 수행과정 설명도
도 7은 본 발명에 있어서 제체 천공 및 필터재 충전 방식 설명도Fig. 1 is a cross-
Fig. 2 is a cross-sectional view of an earth dam to which the present invention is applied
FIG. 3 is a flowchart illustrating the process of the present invention
Fig. 4 is a cross-sectional view of an earth dam installed with a penetrating structure
FIG. 5 is a cross-sectional view of a soil dam installed with a through structure to which the present invention is applied
6 is an explanatory diagram of a process of the embodiment of FIG.
Fig. 7 is a schematic diagram for explaining the method of drilling a hole and recharging a filter in the present invention

본 발명의 상세한 구성 및 수행과정을 첨부된 도면을 통하여 설명하면 다음과 같다.DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

우선, 도 2 및 도 3은 침윤선 상승에 따라 제체(10) 하류측 사면을 통한 토립자 유실이 발생되는 경우, 이를 억제할 수 있도록 해당 부위를 보강하는 본 발명의 실시예를 도시한 것이다.2 and 3 illustrate an embodiment of the present invention in which a site is reinforced so as to suppress the loss of the soil particles through the slope on the downstream side of the article 10 in accordance with the rise of the infiltration line.

도 2는 본 발명이 적용되어 보강이 완료된 상태의 제체(10) 단면도로서, 도시된 바와 같이, 침윤선이 상승하여 누수가 발생되는 제체(10) 하류측 사면에 필터재(20)로 구성되는 개질(改質) 성토부, 필터시트(25) 및 피복층(30)이 구축되어, 제체(10)내 공극수의 원활한 배출은 보장하면서도 제체(10)내 토립자의 동반 유출은 억제하게 된다.FIG. 2 is a cross-sectional view of the article 10 in a state where the reinforcement is applied with the present invention. As shown in FIG. 2, a reforming member 20 made of a filter material 20 is provided on a downstream slope of the article 10, The filter sheet 25 and the cover layer 30 are constructed to prevent the coalesced outflow of the particles in the body 10 while ensuring smooth discharge of the pore water in the body 10.

도 3은 본 발명의 수행과정을 단계별로 도시한 것으로, 도시된 바와 같이, 본 발명은 흙댐의 하류측 제체(堤體)(10) 하단부를 절토하는 절토단계(S11)로 개시된다.FIG. 3 is a flow chart illustrating the process of the present invention. As shown in FIG. 3, the present invention is disclosed as a cutting step S11 for cutting a lower end portion of a downstream dam 10 of a dam.

제체(10)의 절토는 하류측 사면 하단부의 누수 발생 지점에 대하여 실시되며, 절토 사면의 붕괴를 방지하기 위하여 가급적 완만한 경사를 형성하는 것이 바람직하다.It is preferable that the cutting of the body 10 is performed with respect to the leakage point at the downstream side of the slope on the downstream side, and a gentle slope is preferably formed as much as possible in order to prevent collapse of the slope slope.

절토단계(S11)가 완료되면, 절토부에 투수성 입상체(粒狀體)인 필터재(20)를 포설한 후 정지(整地)하여 필터재(20)로 구성된 제체(10) 사면을 신설하는 성토단계(S21)가 수행된다.After the cutting step S11 is completed, a filter material 20, which is a water-permeable granular material, is laid on the cut soil and then grounded to form a slope of the material 10 composed of the filter material 20 The embankment step S21 is performed.

필터재(20)로는 흙댐의 축제 재료인 토사보다 투수성이 양호한 모래가 적용될 수 있으며, 필터재(20)의 성토부를 구획하여 표면측에는 모래보다 상대적으로 입경이 큰 세립질 자갈 등을 적용할 수도 있다.As the filter material 20, sand having better water permeability than that of the soil material that is the fountain material of the dirt dam can be applied, and fine-grained gravels having a relatively larger particle size than the sand can be applied to the surface side of the filter material 20 have.

성토단계(S21)가 완료되면, 필터재(20)로 구성된 제체(10) 사면에 투수성 섬유제 시트인 필터시트(25)를 전개하는 전개단계(S31)가 수행된다.When the embankment step S21 is completed, a developing step S31 for developing the filter sheet 25, which is a water permeable fibrous sheet, is performed on the slope of the article 10 composed of the filter material 20.

투수성 섬유제 시트로는 부직포 등이 적용될 수 있으며, 토립자 유실을 방지하는 최종 여과체 역할을 수행함과 동시에, 후술할 피복단계(S41)에서 구축되는 피복층(30)의 공극을 통한 필터재(20)의 유실 또한 방지하게 된다.A nonwoven fabric or the like may be used as the water-permeable fibrous sheet. The nonwoven fabric may serve as a final filter for preventing the loss of the particles of the soil, and at the same time, the filter material 20 through the pores of the cover layer 30, Thereby preventing the loss of the battery.

이후, 필터시트(25) 표면에 사석, 쇄석 또는 돌망태와 같이 침식에 대한 저항성이 큰 재료로 피복층(30)을 구축하는 피복단계(S41)가 수행된다.Thereafter, a covering step S41 is carried out on the surface of the filter sheet 25 to form a coating layer 30 made of a material resistant to erosion such as stones, crushed stone or gauze.

한편, 도 4는 관통구조물(40)이 설치된 흙댐의 횡단면도로서, 동 도면에는 취수탑과 연결된 방류관이 제체(10)를 횡단 관통하여 설치된 상태가 도시되어 있다.4 is a cross-sectional view of an earth dam in which the penetrating structure 40 is installed. In the figure, the discharge pipe connected to the water taking-in tower is shown passing through the body 10.

이렇듯, 제체(10)를 관통하는 매설 관통구조물(40)이 설치된 흙댐의 경우, 관통구조물(40)과 제체(10)간 접촉면이 공극수의 고속 배수로로서 작용하여 관통구조물(40)의 제체(10) 하류측 노출부에 누수가 발생되고 그에 따른 토립자 유실이 발생될 수 있는 바, 본 발명에서는 도 5에서와 같이, 관통구조물(40) 하류측 노출부 주변 제체(10)를 투수성 필터재(20)로 개질하고, 그 표면을 폐합하는 필터시트(25) 및 피복층(30)을 구축함으로써, 관통구조물(40) 주변 제체(10)내 공극수의 원활한 배출은 보장하면서도 제체(10)내 토립자의 동반 유출은 억제하게 된다.In this case, the contact surface between the penetrating structure 40 and the body 10 acts as a high-speed drainage path of the pore water in the case of an earth dam provided with a through-hole penetration structure 40 penetrating the body 10, The leakage of the soil particles may occur in the downstream side exposed portion. In the present invention, as shown in FIG. 5, the peripheral side exposed portion side peripheral body 10 of the penetrating structure 40 is permeable to the permeable filter material 20 and the filter sheet 25 and the covering layer 30 for closing the surface of the through-hole 40 to ensure smooth discharge of the pore water in the peripheral body 10 of the penetrating structure 40, Associated outflow is inhibited.

도 6은 이러한 본 발명의 관통구조물(40) 주변 제체(10) 보강 수행과정을 단계별로 도시한 것으로, 도시된 바와 같이, 본 발명은 관통구조물(40)의 하류측 노출부 주변 제체(10)에 관통구조물(40)과 평행한 굴착공을 관통구조물(40)에 밀착하여 천공하는 천공단계(S12)로 개시된다.6 is a perspective view illustrating the process of reinforcing the surrounding body 10 around the penetrating structure 40 according to the present invention. As shown in FIG. 6, (S12) in which the drilling hole parallel to the penetrating structure 40 is closely contacted with the penetrating structure 40 and punched.

관통구조물(40)과 평행 밀착된 굴착공은 통상의 댐 제체(10) 관통구조물(40)이 수평 내지 수평에 근사한 상태로 매설됨을 감안하면 수평천공에 의하여 천공되는데, 도 6에 도시된 바와 같이, 터널 발파공 천공용 천공기, 어스앵커 및 소일네일 시공용 사면 천공기 또는 집수정의 수평 집수관 설치용 천공기 등 수평굴착이 가능한 천공기가 적용될 수 있다.The drilling hole in parallel contact with the penetrating structure 40 is perforated by horizontal drilling in consideration of the fact that the penetrating structure 40 of the normal dam body 10 is buried in a horizontally or horizontally approximated state. A horizontal perforator capable of horizontal excavation such as a tunnel perforation tunnel perforator, an earth anchor and a slope perforator for soil nail construction,

관통구조물(40) 주변에 굴착공이 형성되면 천공된 굴착공에 투수성 입상체(粒狀體)인 필터재(20)를 충전하는 충전단계(S22)가 수행된다.When a drilling hole is formed in the vicinity of the penetrating structure 40, a filling step S22 of filling a perforated drilling hole with a filter material 20, which is a porous material, is performed.

이러한 천공단계(S12) 및 충전단계(S22)를 수행함에 있어서는 관통구조물(40) 주변을 포위하는 다수의 굴착공을 모두 천공한 후 필터재(20)를 일괄 충전하는 것이 아니라, 하나의 굴착공을 천공한 후 필터재(20)를 충전하고, 인접한 굴착공의 천공 및 충전을 반복하는 방식으로 즉, 도 7에서와 같이, 천공단계(S12)와 충전단계(S22)를 굴착공별로 실시하고 이를 관통구조물(40) 주변을 따라 반복하는 방식으로 진행하는 것이 공벽유지 및 관통구조물(40)의 안정성 확보 측면에서 유리하다.In performing the drilling step S12 and the filling step S22, not all the drilling holes surrounding the perforated structure 40 are punctured, and the filter material 20 is not collectively charged. Instead, The perforation step S12 and the filling step S22 are performed for each excavator as shown in FIG. 7 in such a manner that the filter material 20 is pierced and the perforation and filling of adjacent excavator holes are repeated It is advantageous in terms of maintaining the pore wall and the stability of the penetrating structure 40 to proceed in a repeated manner along the perimeter of the penetrating structure 40.

또한, 천공단계(S12)에서 천공된 굴착공에 필터재(20)를 투입하는 충전단계(S22)를 수행함에 있어서는 도 7에서와 같이, 일단 오거드릴(auger drill) 등의 굴착장치(51)와 케이싱(52)을 동반 압입하여 천공을 실시한 후, 소정 심도의 천공이 완료되면 굴착장치(51)를 철수하고 케이싱(52)은 존치한 상태에서 트레미관(tremie pipe) 등의 압송관을 케이싱(52) 내부로 투입하여 필터재(20)를 압송, 투입함과 동시에 케이싱(52)을 인발하는 방식을 적용함으로써, 굴착공내 필터재(20)의 신속하고 밀실(密實)한 충전이 가능하다.7, the excavating device 51 such as an auger drill may be used to perform the charging step S22 for charging the filter material 20 into the drilled hole in the drilling step S12, The drilling apparatus 51 is withdrawn when the drilling of the predetermined depth is completed and the pressurization pipe such as a tremie pipe is installed in the casing The filter material 20 in the excavation hole can be rapidly and tightly filled by applying the method of feeding the filter material 20 into the inside of the excavator 52 by press-feeding and injecting the filter material 20 and drawing out the casing 52 .

이와 같은 과정을 통하여 천공단계(S12) 및 충전단계(S22)가 완수되면 도 7 하부의 A-A'선 단면도에서와 같이, 관통구조물(40) 주변을 긴밀하게 포위하는 필터재(20)층이 형성된다.When the drilling step S12 and the filling step S22 are completed through the above process, as shown in the sectional view taken along the line A-A 'in the lower part of FIG. 7, the filter material 20 closely surrounding the penetrating structure 40 .

충전단계(S22)가 완료되면, 필터재(20)가 충전된 관통구조물(40) 주변 굴착공 표면에 투수성 섬유제 시트인 필터시트(25)를 적층하는 적층단계(S32)가 수행되며, 이후 필터시트(25) 표면에 관통구조물(40)을 포위하는 피복층(30)을 사석, 쇄석 또는 돌망태와 같이 침식에 대한 저항성이 큰 재료로 구축하는 폐합단계(S42)가 수행됨으로써 본 발명을 통한 흙댐의 관통구조물(40) 주변부 보강이 완료된다.
When the filling step S22 is completed, a lamination step S32 for laminating the filter sheet 25, which is a water permeable fibrous sheet, on the surface of the excavating hole around the penetrating structure 40 filled with the filter material 20 is performed, The closure step S42 of constructing the covering layer 30 surrounding the penetrating structure 40 on the surface of the filter sheet 25 as a material having high resistance against erosion such as stones, The reinforcement of the periphery of the penetrating structure 40 is completed.

10 : 제체
19 : 필터드레인
20 : 필터재
25 : 필터시트
30 : 피복층
40 : 관통구조물
51 : 굴착장치
52 : 케이싱
S11 : 절토단계
S12 : 천공단계
S21 : 성토단계
S22 : 충전단계
S31 : 전개단계
S32 : 적층단계
S41 : 피복단계
S42 : 폐합단계10: Formation
19: Filter drain
20: Filter material
25: Filter sheet
30:
40: Through structure
51: Excavator
52: casing
S11: Cutting step
S12: Perforation step
S21: Embankment stage
S22: Charging step
S31: Deployment step
S32:
S41: coating step
S42: Closing phase

Claims (2)

기설(旣設) 흙댐(earth dam)의 보강공법에 있어서,
흙댐 제체(堤體)(10)의 하류측 사면 하단부를 절토하는 절토단계(S11)와;
절토단계(S11)에서 절토된 절토부에 제체(10)의 축제 재료보다 투수성이 양호한 투수성 입상체(粒狀體)인 필터재(20)를 포설한 후 정지(整地)하여 필터재(20)로 구성된 제체(10) 사면을 신설하는 성토단계(S21)와;
필터재(20)로 구성된 제체(10) 사면에 투수성 섬유제 시트인 필터시트(25)를 전개하는 전개단계(S31)와;
필터시트(25) 표면에 침식에 저항하는 피복층(30)을 구축하는 피복단계(S41)로 이루어짐을 특징으로 하는 흙댐의 보강공법.In an existing earth dam reinforcement method,
A cutting step S11 for cutting off the lower end of the slope on the downstream side of the dam dam body 10;
The filter material 20 which is a water-permeable granular material having better water permeability than the felling material of the body 10 is placed on the cut-out portion cut in the cutting step S11, 20 in the embankment step S21;
A development step (S31) of developing a filter sheet (25), which is a water permeable fibrous sheet, on a slope (10) made of a filter material (20);
And a covering step (S41) of forming a covering layer (30) resistant to erosion on the surface of the filter sheet (25). 삭제delete
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160025670A (en) 2014-08-27 2016-03-09 박동근 Repair-reinforcement method of the reservoir
KR20160112691A (en) 2015-03-20 2016-09-28 영남대학교 산학협력단 Method of earth dam remodeling for ecology and landscape function
KR102654404B1 (en) 2023-07-12 2024-04-05 대한민국 End expansion type horizontal filter to maintain earth dam

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003020625A (en) * 2001-07-11 2003-01-24 National Institute For Rural Engineering Method for reinforcing soil structure bank body
KR20060100315A (en) * 2006-08-16 2006-09-20 (주)인텔리지오 Upstream part retaining wall type fill dam
KR20080102462A (en) * 2007-05-21 2008-11-26 원 회 양 Process and device for preventing outflow of earth and sand in reclaimed ground
JP2010265603A (en) * 2009-05-12 2010-11-25 Officine Maccaferri Spa Earth fill-stabilizing construction method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003020625A (en) * 2001-07-11 2003-01-24 National Institute For Rural Engineering Method for reinforcing soil structure bank body
KR20060100315A (en) * 2006-08-16 2006-09-20 (주)인텔리지오 Upstream part retaining wall type fill dam
KR20080102462A (en) * 2007-05-21 2008-11-26 원 회 양 Process and device for preventing outflow of earth and sand in reclaimed ground
JP2010265603A (en) * 2009-05-12 2010-11-25 Officine Maccaferri Spa Earth fill-stabilizing construction method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20160025670A (en) 2014-08-27 2016-03-09 박동근 Repair-reinforcement method of the reservoir
KR20160112691A (en) 2015-03-20 2016-09-28 영남대학교 산학협력단 Method of earth dam remodeling for ecology and landscape function
KR102654404B1 (en) 2023-07-12 2024-04-05 대한민국 End expansion type horizontal filter to maintain earth dam

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