Author(s): Zhang Limin; Wang Yongxue; Li Zhijun; Lu Peng; Li Guangwei
Linked Author(s): Yongxue Wang, Zhijun Li
Keywords: No Keywords
Abstract: The sea water splashing onto the wooden footway at the seawall frontier may be frozen into ice due to wave overtopping in cold weather of north China. The wooden footway may be subjected to the frozen-heave loads and lose its stability due to the damage of the clips after several freezing-thawing cycles of the ice. To provide basis for the design and safety operation of the wooden footway at the seawall frontier in winter of north China, a series of freezing-thawing tests on the prototype specimen of the wooden footway were conducted in the low-temperature facility at State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, China. Three working conditions which may produce large frozen-heave loads on the prototype specimen of wooden footway are considered: (1) the water level is the same with the top surface of a slab; (2) the water level is at the half height of the slab; (3) the water level is over the top surface of the slab. The repeated freezing-thawing cycle of the ice was achieved through controlling the environmental temperature in the low-temperature facility. The permanent displacement of the slab was measured and the deformation of clips was observed after the ice melted completely in each run. The test results reveal that the wooden footway is stable as the water level is just under the lower surface of the slab, although the clip deformation occurs. After several freezing-thawing cycles, the clip deformation accumulates to its maximum critical value and the wooden footway tends to lose its stability.
Year: 2014