A Hydraulic Experimental Study of a Movable Barrier on a Revetment to Block Wave Overtopping

Abstract

This paper presents a design for a movable barrier on the revetment of the Haeundae Marine City in Busan, the Korea. This movable barrier was developed to use as a tourist deck in a normal state and to block wave overtopping in an abnormal state. To carry out the physical experiment in a wave flume, the model structure was reduced to a scale of 1/36 compared to the field structure. The discharge of the wave overtopping, the uplift pressure acting on the under surface of a non-standing barrier, and the wave pressure acting in front of a standing barrier were measured to analyze the hydraulic characteristics of the movable barrier. The results show that the impulsive pressure acts on the movable barrier, although the overtopping discharge is less than the allowable limit. When designing a movable barrier at a full scale, engineers should consider the impulsive pressure to secure the barrier’s stability on the target site.

Sustainable Management of Urban Water Resources

“…Recharge in urban areas depends on a number of factors, including climate conditions and the dynamics of their changes [52,53], lithology of subsurface sediments [54,55], topography [56], land use and land cover [52,57], and thickness of the aeration zone [55,58].…”

Wave Force Characteristics and Stability of Detached Breakwaters Consisting of Open Cell Caissons Interlocked via Crushed Stones

“…During the experiment, a sampling rate of 600 Hz was set to measure water level fluctuations, wave pressures, and displacements. In generating impulsive pressure by breaking waves, it should be set to be 1 kHz or higher [20][21][22], but our sampling rate is sufficient to acquire data to qualitatively confirm the occurrence of impulsive pressure in this experiment [23].…”

Evaluation of the Hydraulic Performance of a Rear-Parapet Vertical Breakwater under Regular Waves through Hydraulic Experiments

“…The wave channel depth varies as the bottom slope ranges from 10 to 20 m on the left side but is constant at 1.25 m when the slope ranges from 20 to 50 m [21]. A piston-type wavemaker (Vazquez y Torres Ingenieria SL, Leganés, Spain) is installed at the left side of the wave channel [22]. The maximum stroke of the wave paddle is 1.2 m, the possible wave period range is 1.0-7.5 s for a wave height of 20 cm, and the possible maximum wave height is 55 cm in the wave period range of 1.7-3 s. The wavemaker can generate regular waves (i.e., linear and nonlinear waves), irregular waves (i.e., Bretschneider-Mitsuyasu, JONSWAP, TMA spectrum), and solitary waves by a wave generation software, AwaSys 7 [23,24].…”

“…The measuring positions of pressure gauges p01-p09 were, sequentially, 3.25, 24.7, 30.2, 35.7, 41.2, 46.7, 52.25, 57.1, and 61.95 cm from the bottom. The pressure gauge was equipped with a disk-type pressure transducer with a diameter of 10 mm (SSK Company, Tokyo, Japan; Model: P310) [22]. The data sampling rate was set to 600 Hz to measure the wave pressure and water surface elevation.…”

“…p 01 -p 06 were installed in front of the caisson including the concrete cap without the parapet, and p 07 -p 09 were installed in front of the parapet. [22]. The data sampling rate was set to 600 Hz to measure the wave pressure and water surface elevation.…”