Author(s): Sundaravadivelu Ranganathan; Sakthivel Sundaravadivelu; Kavitha Perumalsamy

Linked Author(s): R. Sundaravadivelu

Keywords: Stability of breakwater; Artificial harbour; Training wall; Round head portion

Abstract: Breakwaters are constructed for the purpose of forming an artificial harbour with a water area so protected from the ocean waves. Breakwater provides protection against waves but some of them serve a dual purpose by providing berthing facilities alongside for a ship. The alignment of the breakwater must be considered after examining the predominant direction of approach of waves and winds, degree of protection required, magnitude and direction of littoral drift, and the possible effect of these breakwaters on the shorelines. If natural rock is abundantly available and can be quarried to the required sizes economically, the rubble mound breakwaters offer the best solution. Three main reasons for the failure of breakwater are (a) reasons inherent to the structure itself, (b) reasons inherent to the prevailing hydraulic and loads conditions, and (c) reasons inherent to the foundation and seabed morphology. In this paper, the stability of breakwaters of fishery harbour in Andhra Pradesh are studied through PLAXIS 2D. The proposed harbour in Uppada consists of two breakwaters to be constructed at an angle to the shore line up to −5.0 m and −6.0 m contours forming an enclosing area and in Machilipatnam breakwaters are normal to the shore line up to −4.0 m depth contour. Stability analysis is carried out on five sections of each locations of fishery harbour. The factor of safety required for the stability is 1.3. The design of breakwaters is made safe by replacing the soft clay with rock filling for the depth of 1–2 m in order to ensure the stability of the breakwater.

DOI: https://doi.org/10.1007/978-981-97-6009-1_9

Year: 2022