이용자 안전을 고려한 호안 월파시 친수공간 배후지 설계에 관한 연구

Abstract

In urban coastal areas, these structures often become major components of the city's waterfront landscape, becoming known as major attractions for local residents and tourists, and are sometimes designed to become tourist attractions. The existing wave overtopping concept was a factor studied for the stability of structures and was continuously applied to breakwater and revetment design. However, recently, as the development of waterfront has been oriented, such as the redevelopment of the North Port, user safety management has become very important. In this situation, Busan North Port is equipped with a marina and water-friendly space within the trade port, and various leisure ships must pass through the trade port. Therefore, in this study, based on information on ships actually entering Busan North Port, we analyzed the characteristics of ship-induced waves through the current status of ships in Busan Port and literature data on sailing waves to determine whether there is an impact on shore overtopping waves, and observed long-term waves in the North Port redevelopment and marina facilities. Based on the wave data around the water-friendly revetment measured in , the wave source incident on the water-friendly revetment was set. Based on this, numerical experiments on wave overtopping were performed on three models with different inclination angles of the embankment applied to the inclined hydrophilic revetment. In this process, we proposed the concept of safety distance, which is a factor that is easy for users to recognize, and set a function combining the sum of wave characteristics, structure inclination angle, overtopping height, and water level at overtopping. To estimate the functional equation, 20 numerical test cases were performed using wave sources invading the entire area of the Busan Port North Port redevelopment, and the overtopping height, water level when overtopping, flow velocity when overtopping, and safety distance were measured. The relational expression obtained through this was applied to Marine City. In this paper, the concept is presented for user safety in the hinterland was proposed as safety distance, and a function form for this was established between wave characteristics and structure inclination angle. As the results of analyzing wave data measured within the Busan North Port Redevelopment Marina facility, waves exceeding the design wave height of 0.5 m lasted for 3 hours, and the maximum significant wave height was 0.9 m and the maximum wave height was 1.13 m. Also, wave analysis in front of the waterfront park where long-term waves were observed, the significant wave height of the waves that invaded in the summer of 2021 was about 0.8 to 1.0 m, the significant period was 7 to 8 sec, and similar waves were observed even in situations where typhoons did not invade. had a lasting impact. Therefore, based on the constant frequency and high wave observation results, incident wave specifications were set and values were calculated using Flow-3D for a model with three inclination angles (1:1, 1:1.5, 1:2) of a simple inclined revetment. As a result of the simulation in North Port Redevelopment, almost no waves occurred at the peak cycle of 7.0 sec, but waves occurred on all three slopes at the peak cycle of 7.5～8.0 sec. The flow speed at the time of overtopping was 1.81～6.53 m/s, and the water level at the time of overtopping was 0.25～1.4 m. the safety distance presented was 1.0 to 25.0 m. Otherwise, the wave overtopping height and overtopping flow velocity were very large, a safety distance exceeding the limit which is the embankment width was 95m occurred in Marine City. Finally, comparing the exponential and linear safety distance correlation equations obtained for the North Port with the Marine City numerical experiment results, the linear correlation equation is more appropriate.