KR20080046619A - Structure for preventing scouring of river - Google Patents

Structure for preventing scouring of river Download PDF

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Publication number
KR20080046619A
KR20080046619A KR1020080042208A KR20080042208A KR20080046619A KR 20080046619 A KR20080046619 A KR 20080046619A KR 1020080042208 A KR1020080042208 A KR 1020080042208A KR 20080042208 A KR20080042208 A KR 20080042208A KR 20080046619 A KR20080046619 A KR 20080046619A
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South Korea
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bottom plate
scour
guide channel
prevention structure
scour prevention
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KR1020080042208A
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Korean (ko)
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KR101008188B1 (en
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공혜선
강영구
박은정
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공혜선
강영구
박은정
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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/02—Piers; Abutments ; Protecting same against drifting ice
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Revetment (AREA)

Abstract

A scour prevention structure is provided to intercept or reduce a downward flow and to prevent or reduce scour by centralizing the flow of flowing water upward using an upward inclined guide channel bottom plate and a guide channel wall, to prevent the loss of a scour prevention structure by filling up an empty space on the lower part of a guide channel bottom plate and a diffusion section and increasing the deadweight of a structure and increasing shear frictional force for a riverbed using a shear key, and to keep soil at the side of a pier not to be moved by the flow of water flowing on a riverbed using a diffusion section. A scour prevention structure is installed to the upper stream section at the front of a pier correspondingly to the flow direction and provided with an upward inclined guide channel bottom plate(11) and a guide channel wall(12) at the front, a diffusion section(15) spread radially in a conic shape at the side, and an intermediate wall for supporting the guide channel bottom plate and the guide channel wall at the inside, wherein a shear key(13) is installed at the base of a bottom plate(16) to prevent the scour of the pier effectively and to have no danger of loss.

Description

세굴방지 구조물{structure for preventing scouring of river}Structure for preventing scouring of river}

도1은 세굴발생 현상의 개념도1 is a conceptual diagram of scour occurrence phenomenon

도2는 세굴방지 구조물 전면 사시도Figure 2 is a front perspective view of the scour prevention structure

도3은 세굴방지 구조물 배면 사시도Figure 3 is a perspective view of the back of the scour prevention structure

도4는 세굴방지 구조물을 적용한 경우의 세굴방지 개념도Figure 4 is a conceptual diagram of scour prevention when applying the scour prevention structure

<도면의 주요부분에 대한 부호의 간단한 설명><Brief description of symbols for the main parts of the drawings>

1:수류 2:하강류(downflow)1: water flow 2: downflow

3:하상 4:후류형 와류(wake vortex)3: bed 4: wake vortex

5:세굴공(scour hole) 6:교각5: scour hole 6: piers

7:말굽형 와류(horseshoe vortex) 10:세굴방지 구조물7: Horseshoe vortex 10: Scour resistant structure

11:유도수로 바닥판 12:유도수로 벽체11: guide channel bottom plate 12: guide channel wall

13:전단키 14:중간벽13: shear key 14: middle wall

15:확산부 16:바닥판15: Diffusion part 16: Bottom plate

본 발명은 교각(6)이 시공된 하상(3)의 주변에 발생하는 세굴을 방지하는 구조물에 관한 발명으로서, 유수의 흐름을 조절하여 하강류(downflow)(2)를 차단하거나 또는 감소시키는 세굴방지 구조물(10)에 관한 것이다.The present invention relates to a structure for preventing scour occurring around the riverbed 3 on which the pier 6 is constructed, and scrubbing the flow of flowing water to block or reduce the downflow 2. It relates to the prevention structure (10).

도1은 세굴형성 원인의 개념도로서, 교각(6)에서 국부세굴을 일으키는 근본적인 원인은 하상(3)에서 와류의 형성인 바, 교각(6)주위에서 발생하는 와류 중 교각(6) 전면부에서 발생한 하강류(downflow)(2)에 의해 발생되는 와류를 말굽형 와류(horseshoe vortex)(7)라 하고 교각 직하류에서 발생되는 와류를 후류형 와류(wake vortex)(4)라 한다. 세굴은 기초에 유입되는 토사의 퇴적량보다 제거량이 큰 경우 발생하게 되며 시간이 지남에 따라 점차 세굴공(scour hole)(5)과 교각 전면의 세굴심이 증가하게 되어 교각을 파손시킬 수 있을 뿐만 아니라, 이로인해 하상토와 교각과의 마찰력이 떨어지면 다리붕괴의 원인이 될 수 있다. 이 와류계의 구조는 세가지 기본계인 말굽형 와류(horseshoe vortex)(7) 및 후류형 와류(wake vortex)(4) 그리고 트레일링 와류(trailing vortex) 현상으로 구분되며 이들 와류계의 현상이 전부 혹은 한 두가지 현상으로 구성된다.1 is a conceptual diagram of the cause of scour formation, the root cause of local scour in the pier (6) is the formation of vortices in the lower bed (3), the vortex occurring around the pier (6) in front of the pier (6) The vortex generated by the generated downflow 2 is called a horseshoe vortex 7 and the vortex generated immediately downstream of the piers is called a wake vortex 4. The scour occurs when the removal amount is larger than the amount of sediment inflow into the foundation, and as time passes, scour holes (5) and scour depths in front of the piers increase, which can damage the piers. As a result, the friction between the subsoil and the pier can cause bridge collapse. The structure of this vortex system is divided into three basic systems: horseshoe vortex (7), wake vortex (4), and trailing vortex phenomena. It consists of one or two phenomena.

교각이나 기초를 세굴로부터 보호하는 종래의 방법에는 세굴에 대한 하상물질의 저항력을 증가시키는 방법과 하상물질을 세굴시키는 하강류(downflow)(2)와 와류 같은 세굴유발 요인의 능력을 감소시키는 방법이 있다. 첫 번째 방법은 교각주위의 하상(3)에 큰 입경의 재료나 사석, 테트라포드(tetrapod), 케이블 블록 등과 같은 보호층을 부설하는 방법이며, 두 번째 방법은 교각 기둥이나 교각 기초에 교각보호 세굴방지 장치를 일체로 시공하거나, 교각 전면 상류부에 교각보호 세굴방지 장치를 설치하는 방법이다.Conventional methods of protecting pier or foundation from scour include increasing the resistance of the scour material to scour, and reducing the ability of scour-causing factors such as downflows and vortices to scour the scum. have. The first method is to lay a protective layer such as large-diameter materials, sandstones, tetrapods, cable blocks, etc. on the lower bed (3) around the piers, and the second method is to prevent piling protection on piers or foundations. It is a method of constructing the unit integrally, or installing a pier protection scour prevention device upstream of the bridge front.

상기의 세굴에 대한 하상물질의 저항력을 증가시키는 방법 중 상기 사석을 채우는 방법은 적정규모의 사석을 확보하는 것이 어렵고, 석산 개발에 따른 환경파괴가 유발되며, 홍수 시 설치된 사석이 유실되기도 하는 등 많은 문제점을 안고 있다. 또한 콘크리트 블록을 설치하는 경우에도 콘크리트 블록 자체의 형상으로 인하여 교량기초 주변 하상의 굴곡부를 완전하게 보호하지 못하며 시공시 많은 장비와 인력 및 기간이 소요되는 문제점이 있다.Among the methods of increasing the resistance of the bed material to the scour, the method of filling the sandstone is difficult to secure the proper size of the sandstone, causing the destruction of the environment due to the development of quarries, and the loss of the installed sandstone during flooding. I have a problem. In addition, even when installing the concrete block, due to the shape of the concrete block itself does not completely protect the bent portion around the base of the bridge, there is a problem that takes a lot of equipment, manpower and period during construction.

또 상기의 하강류(downflow)(2)를 감소시켜 세굴을 방지하는 방법 중 교각(6)과 일체로 시공되거나 교각(6) 전면에 세굴방지 시설을 부착하는 경우 교각 기둥에 부착된 세굴방지 시설로 인해 교각 기둥의 단면이 국부적으로 확대되어 강성의 불연속이 발생됨에 따라 교각기둥의 거동에 해로운 영향이 발생할 수 있으며, 기둥의 투영면적 증가 및 자중의 증가효과로 인해 수평하중 및 수직하중이 증가되어 교각의 기둥 및 기초단면 설계시 비경제성을 발생시킬 수 있다. 그리고 하상위로 돌출된 확대된 단면과 하상 접합부에 또다른 세굴을 유발시킬 수 있으며, 교각 기둥 위치에서 통수단면을 축소시켜 수축세굴의 발달이 예측된다.In addition, the method to prevent scouring by reducing the downflow (2) of the scrubbing prevention facilities attached to the piers pillars when integrally constructed with the pier (6) or attaching a scour prevention facility in front of the pier (6) As a result, the cross section of the piers can be enlarged locally, resulting in stiff discontinuities, which can have a detrimental effect on the behavior of the piers, and the horizontal and vertical loads are increased due to the increase in the projected area of the piers and the increase of its own weight. Inconsistencies in designing columns and foundations of bridge piers can occur. In addition, it is possible to cause another scour in the enlarged cross-section and the bottom joint protruding to the upper and lower sides, and the development of shrinkage scour is predicted by reducing the communication surface at the position of the piers.

본 발명은 전술한 문제점을 해결하기 위해 고안한 것으로써, 상향경사를 갖는 유도수로 바닥판(11)과 유도수로 벽체(12)를 이용하여 유수의 흐름을 상향으로 집중시켜 흐르게 함으로써 하강류(downflow)(2)를 차단하거나 감소시켜 세굴을 방지하거나 감소시키고, 유도수로 바닥판(11) 및 확산부(15) 하부의 빈 공간에 토사를 채워 구조체 자중 증가와 전단키(13)를 이용한 하상(3)에 대한 전단마찰력 증가를 통해 세굴방지 구조물(10)의 유실을 방지하며, 확산부(15)로 인해 하상면을 흐르는 유수의 흐름이 교각 측면의 토사를 이동시키지 못하도록 고안된 세굴방지 구조물(10)을 제공하는데 목적이 있다.The present invention has been devised to solve the above-described problems, by using the induction channel bottom plate 11 and the induction channel wall 12 having an upward slope to concentrate the flow of flowing water upward flow (downflow) (2) to block or reduce the scour to prevent or reduce, by filling the earth and sand in the empty space under the bottom plate 11 and the diffuser 15 with an induction water to increase the weight of the structure and using the shear key (13) The scour prevention structure designed to prevent loss of the scour prevention structure 10 by increasing shear friction on the bed 3 and prevent the flow of running water flowing through the bed surface due to the diffusion part 15 do not move the soil on the side of the piers. The purpose is to provide (10).

상기의 목적을 달성하고자 하는 본 발명은 교각(6)의 전면 상류부에 유수방향과 대응되도록 세굴방지 구조물(10)을 설치하는 바, 상향경사의 유도수로 바닥판(11)과 유도수로 벽체(12)가 전면에 형성되고, 그 측면으로는 원뿔모양처럼 방사형으로 퍼지는 확산부(15)가 설치되고, 유도수로 바닥판(11) 및 유도수로 벽체(12)를 지지하는 중간벽(14)이 내부에 구비되며, 바닥판(16) 하면에는 전단키(13)가 설치되어 교각(6)의 세굴을 효과적으로 방지하면서도 유실의 위험이 없는 세굴방지 구조물을 제공한다.The present invention to achieve the above object is to install the scour prevention structure 10 so as to correspond to the flow direction in the front upstream of the pier (6), the induction channel of the upward slope bottom plate 11 and the induction channel The wall 12 is formed on the front surface, and the diffusion portion 15 is radially spread like a cone on the side thereof, and the intermediate wall supporting the bottom plate 11 and the guide channel wall 12 in a guide channel. 14 is provided inside, the bottom plate 16 is provided with a shear key 13 is provided to prevent the scour of the pier 6 effectively while providing a scour prevention structure without the risk of loss.

상기와 같은 구성으로 이루어진 본 발명은 유수의 흐름이 세굴방지 구조물(10)을 통과하면서 유수의 흐름이 상향으로 변화하도록 하여 하강류(downflow)(2)를 차단하거나 감소시켜 세굴에 효과적으로 대응할 수 있게 하고, 구조물 내부에 토사채움이 가능하므로 구조체 자중이 증가하고 전단키(13)에 의하여 하상 전단마찰력이 커져서 세굴방지 구조물(10)이 유수에 의해 유실 및 위치이탈 될 우려가 적어지며, 확산부(15)에 의해 교각 측면을 흐르는 유수의 흐름이 약화되어 교각 측면부 토사이동이 감소되는 바 이와같은 구성에 의하여 상기한 본 발명의 기술적 과제를 달성할 수 있게 되는 것이다.According to the present invention having the above configuration, the flow of flowing water flows upward while passing through the scour prevention structure 10 so as to block or reduce the downflow 2 so as to effectively cope with scouring. And, because it is possible to fill the soil inside the structure, the weight of the structure is increased and the shear shear friction force is increased by the shear key 13, so that the scour prevention structure 10 is less likely to be lost or dislodged by the running water, diffusion portion 15 The flow of the flowing water flowing through the pier side is weakened by) so that the tosai movement of the pier side portion is reduced, and thus the above technical problem of the present invention can be achieved.

이하 첨부된 도면을 참조하여 상기와 같은 본 발명의 기술적 개념이 바람직하게 구현된 일 실시예와 함께 본 발명을 더욱 상세하게 설명한다. 다만 이는 이 기술 분야에서 통상의 지식을 가진자가 본 발명을 더욱 명확하게 이해하고 용이하게 실시할 수 있게 하기 위한 것으로 본 발명의 보호범위를 이에 한정하고자 하는 것은 아니며, 전술한 사항들 이외에 본 발명이 가지는 또 다른 기술적 특징들 및 장점들은 후술하는 본 발명에 따른 바람직한 실시예에 대한 설명을 통하여 당업자에게 더욱 확실하게 이해될 수 있을 것이다.Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings, with an embodiment in which the technical concept of the present invention is preferably implemented. However, this is intended to enable those skilled in the art to more clearly understand and easily implement the present invention, and are not intended to limit the protection scope of the present invention thereto. Still other technical features and advantages will be more clearly understood by those skilled in the art through the following description of the preferred embodiment according to the present invention.

도2 및 도3은 본 발명의 세굴방지 구조물 전면 및 배면의 구성을 나타낸 사시도이며, 도4는 세굴방지 구조물(10)을 적용한 경우의 세굴방지 개념도이다.2 and 3 are perspective views showing the front and rear structure of the scour prevention structure of the present invention, Figure 4 is a conceptual view of the scour prevention when the scour prevention structure 10 is applied.

도2 및 도3에 도시된 바와같이 본 발명의 세굴방지 구조물(10)은 유도수로 바닥판(11) 및 유도수로 벽체(12)가 전면에서 배면으로 상향경사를 이루며 세굴방지 구조물(10) 전면부를 구성하게 되는데, 유도수로 벽체(12)는 유도수로 바닥판(11) 시점부에서 설치간격을 넓게하고 상향경사 종점부에서 설치간격을 시점부보다 좁게 사다리꼴 형태로 형성되게 된다. 그 양 측면으로는 확산부(15)가 원뿔모양과 같이 방사형으로 퍼져나가는 형태로 구성되고, 확산부(15)와 유도수로 바닥판(11)을 지지하는 중간벽(14)과 바닥판(16)이 하부에 구비된다. 그리고 바닥판(16) 하부에는 직육면체 형태의 전단키(13)가 설치된다.As shown in FIGS. 2 and 3, the scour prevention structure 10 of the present invention has an induction channel bottom plate 11 and an induction channel wall 12 that are inclined upwardly from the front to the rear, and the scour prevention structure 10 ) The front part is configured, the induction channel wall 12 is formed in a trapezoidal shape in the induction channel bottom plate 11 to widen the installation interval and the installation interval at the inclined upward end portion narrower than the viewpoint. On both sides, the diffusion part 15 is radially spread like a cone, and the intermediate wall 14 and the bottom plate supporting the diffusion part 15 and the bottom plate 11 with guided water ( 16) is provided at the bottom. The bottom plate 16 is provided with a shear key 13 having a rectangular parallelepiped shape.

상기에 전술된 바와 같이 세굴방지 구조물(10)에서 유도수로 바닥판(11)은 도4에서와 같이 유수의 흐름을 상향으로 변화시켜주며, 유도수로 벽체(12) 시점부에서는 유도수로 벽체(12) 배치간격이 넓게 되어 있으나 유수가 유도수로 바닥판(11)을 따라서 상향으로 이동할수록 유도수로 벽체(12)의 설치간격이 좁아지고, 이에따라 유도수로의 단면이 축소되어 유도수로 벽체(12) 시점부보다 종점부에서의 유속이 증대되어 경사방향을 따라 빠르게 흐르는 유수에 의해 하강류(downflow)(2)를 효과적으로 감소시킬 수 있도록 하였다.As described above, the guide plate 11 in the scour prevention structure 10 changes the flow of running water upward as shown in FIG. 4, and the guide channel at the time point of the guide channel wall 12. The spacing of the walls 12 is wider, but the flow of the flowing water upwards along the bottom plate 11 becomes narrower, so that the spacing of the walls 12 is reduced. The flow velocity at the end point of the furnace wall 12 was increased so that the downflow 2 could be effectively reduced by the flowing water flowing along the inclined direction.

유도수로 바닥판(11)의 형태는 도2와 같은 평평한 형태 뿐만 아니라 오목한 곡면이나 계곡과 같이 중앙부가 종방향으로 움푹꺼진 형태로 다양하게 제작할 수 있다. 또한 확산부(15)도 원뿔모양 형태 뿐만 아니라 유수의 흐름을 방사형으로 퍼지게 할 수 있는 각뿔과 같은 형태를 적용하면 무방하다.The induction channel bottom plate 11 may be manufactured in various forms such as a flat shape as shown in FIG. 2 as well as a concave curved surface or a valley with a central portion recessed in the longitudinal direction. In addition, the diffusion portion 15 may also be applied to a cone-like shape, such as a pyramid that can radially spread the flow of running water.

본 발명의 세굴방지 구조물(10)은 유수흐름이 상향이 되도록 유도수로 바닥판(11) 및 유도수로 벽체(12)가 구비되어 와류를 형성하는 하강류(downflow)(2)를 차단하거나 감소시킬 수 있어서 세굴현상을 효과적으로 방지할 수 있으며, 그 측면으로 확산부(15)가 설치되어 하상에서 유수의 흐름을 방사형으로 퍼지게 하여 교각 측면의 토사이동을 감소시킬 수 있고, 구조물 내부에 토사를 채울 경우 세굴방지 구조물(10)의 유실이나 위치이탈이 발생하지 않도록 하므로 추가적인 보수없이 지속적인 세굴방지 효과를 볼 수 있다.The scour prevention structure 10 of the present invention is provided with an induction channel bottom plate 11 and an induction channel wall 12 to block the downflow 2 to form a vortex so that the flow of water flows upward. It can reduce the scour phenomenon effectively, and the diffusion part 15 is installed on the side to radially spread the flow of running water in the riverbed to reduce the sediment movement of the side of the piers, and the earth and sand inside the structure When filling so that the loss or positional deviation of the scour prevention structure (10) does not occur, it is possible to see a continuous scour prevention effect without additional repair.

Claims (2)

교량의 교각에 있어서, 상기 교각의 전면부 상류측 유수방향에 대응되도록 세굴방지구조물을 설치하고, 상기 세굴방지구조물은 상향경사의 유도수로 바닥판과 유도수로벽체가 구비되고, 그 측면에 확산부가 형성되며, 유도수로 바닥판과 확산부 하부에 중간벽이 설치되고, 확산부와 중간벽 하부에 바닥판이 있으며 그 바닥판 하부에 설치되는 전단키를 포함하는 세굴방지 구조물In the bridge piers, the scour prevention structure is provided so as to correspond to the flow direction upstream of the front portion of the bridge, the scour prevention structure is provided with a bottom plate and the guide channel wall of the upward slope induction water, diffused on the side An addition is formed, the scrubbing prevention structure including a shear key is installed in the bottom plate and the bottom of the diffusion portion in the induction water, there is a bottom plate in the diffusion portion and the lower portion of the intermediate wall and installed under the bottom plate 제1항에서 유도수로 벽체는 상기 세굴방지 구조물의 유도수로 바닥판에 형성되며, 상향경사 시점측에서는 유도수로 벽체 사이의 간격이 넓고, 상형경사 종점측에서는 유도수로 벽체 사이의 간격이 좁은 사다리꼴 형태로 이루어지는 것을 특징으로 하는 세굴방지 구조물The induction channel wall in claim 1 is formed in the induction channel bottom plate of the scour prevention structure, the spacing between the induction channel wall on the side of the upward slope is wide, the spacing between the induction channel wall on the side of the upper slope slope Scour prevention structure, characterized in that the trapezoidal form
KR1020080042208A 2008-05-07 2008-05-07 structure for preventing scouring of river KR101008188B1 (en)

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KR100970230B1 (en) * 2009-12-16 2010-07-16 (주)동우구조기술단 The pier safety structure of ground subsidence by flowing water
KR100970226B1 (en) * 2009-12-16 2010-07-16 (주)동우구조기술단 The pier safety supporter of ground subsidence
CN109372006A (en) * 2018-11-27 2019-02-22 中国电建集团华东勘测设计研究院有限公司 Offshore wind turbine foundation scour protection structure and its construction method
CN111945682A (en) * 2020-09-14 2020-11-17 大连理工大学 Energy dissipation pool with inverted triangular wedge tail pier
CN114592421A (en) * 2022-03-10 2022-06-07 合肥工业大学 Local protection method and device for river channel bridge foundation

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US4966491A (en) * 1989-08-01 1990-10-30 Sample Jay W Subsurface dune protection system and method
JP2000204531A (en) * 1999-01-12 2000-07-25 Fujita Corp Curtain type breakwater
KR100690062B1 (en) * 2005-10-07 2007-03-08 이화 A block to prevent flooding soil of a current

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100970230B1 (en) * 2009-12-16 2010-07-16 (주)동우구조기술단 The pier safety structure of ground subsidence by flowing water
KR100970226B1 (en) * 2009-12-16 2010-07-16 (주)동우구조기술단 The pier safety supporter of ground subsidence
CN109372006A (en) * 2018-11-27 2019-02-22 中国电建集团华东勘测设计研究院有限公司 Offshore wind turbine foundation scour protection structure and its construction method
CN109372006B (en) * 2018-11-27 2023-11-10 中国电建集团华东勘测设计研究院有限公司 Scour prevention protection structure for offshore wind turbine foundation and construction method thereof
CN111945682A (en) * 2020-09-14 2020-11-17 大连理工大学 Energy dissipation pool with inverted triangular wedge tail pier
CN114592421A (en) * 2022-03-10 2022-06-07 合肥工业大学 Local protection method and device for river channel bridge foundation
CN114592421B (en) * 2022-03-10 2023-09-26 合肥工业大学 River bridge foundation local protection method and device

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