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도로주행의 안전성 확보의 측면에서 우수에 의해 형성되는 노면의 수막두께와 이로 인한 차량주행성능에 관한 사항은 도로 포장설계에서 고려되어야 할 주요 요소이다. 즉, 집중호우시 형성되는 노면의 수막두께는 강우량, 강우강도 및 도로의 종․횡단 경사 이외에도 포장체의 종류에 따라 다양하다. 본 연구에서는 강우강도에 따른 도로에서의 수막두께를 산정하기 위하여 운동파 이론으로 유출량을 산정하기 위하여 SWMM 모형의 RUNOFF 블럭과 FFC2Q 모형을 사용하였다. FFC2Q에서는 보다 정밀한 지표면 유출해석과 수막두께의 산정을 위하여 지표면 저류 수심 변화를 고려한 저류방정식을 구성하여 해석하는 방법을 제안하고, 이에 대한 구체적인 개념과 적용방법을 제시하였다. 포장체의 종류에 따라 불투수성(밀입도) 포장은 침투가 발생하지 않아 수막두께가 크게 산정되었으며, 침투성 포장인 투수성 포장과 배수성 포장은 큰 침투율에 의하여 수막두께는 얇은 것으로 나타났다. 설계빈도 및 강우강도의 증가에 따라 수막은 2.0 ~ 3.6 mm로 두께가 크게 증가하고 있으며, 강우지속시간이 길어질수록 수막두께는 2.9 ~ 1.4 mm로 작아지는 것으로 분석되었다. 침투성 포장(투수성, 배수성)은 불투수성 포장에 비하여 수막을 현저하게 줄일 수 있을 것으로 판단된다.
In terms of securing road driving safety, the water film thickness of road surface formed by rainwater and the resulting vehicle driving performance are the main factors to be considered in the pavement design. In other words, the water film thickness of the road surface formed during heavy rainfall varies depending on the type of pavement, in addition to rainfall, rainfall intensity, and longitudinal and transverse slope of the road. In this study, the runoff block and FFC2Q model of SWMM model were used to estimate the runoff using the kinematic wave theory to estimate the thickness of water on the road according to rainfall intensity. The FFC2Q models proposed a method to construct and analyze the storage equations considering the changes in the surface reservoir depth for more accurate surface runoff analysis and water film thickness. According to the type of package, the permeability (density) package did not penetrate and the water film thickness was largely estimated. The permeable package and the permeable package were thin due to the large penetration rate. As the design frequency and rainfall intensity increase, the thickness of water film is increased to 2.0 ~ 3.6 mm and the thickness of water film decreases to 2.9 ~ 1.4 mm as rainfall duration is longer. Permeable packaging (water permeability, drainage) is expected to significantly reduce the water film compared to impermeable packaging.
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- Publisher :The Society of Convergence Knowledge
- Publisher(Ko) :융복합지식학회
- Journal Title :The Society of Convergence Knowledge Transactions
- Journal Title(Ko) :융복합지식학회논문지
- Volume : 8
- No :1
- Pages :27-39
- DOI :https://doi.org/10.22716/sckt.2020.8.1.004
The Society of Convergence Knowledge Transactions
