Structural System Evaluation of Jetties

M. Rajkumar; G. V. Satyanarayana; P. Veerabhadra Rao

CALL FOR PAPERS : Apr-2023

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25-Apr-23

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Structural System Evaluation of Jetties

Author(s):

M. Rajkumar , GAYATRI VIDYA PARISHAD COLLEGE OF ENGINEERING (AUTONOMOUS); G. V. Satyanarayana, VISAKHAPATNAM PORT TRUST; P. Veerabhadra Rao, GAYATRI VIDYA PARISHAD COLLEGE OF ENGINEERING (AUTONOMOUS)

Keywords:

Berthing Structures, Diaphragm Wall, Lateral Load, Raker Pile, Vertical Pile

Abstract:

Berthing structures are generally constructed in the ports and harbours to facilitate the berthing and mooring operations of the vessels, loading and unloading of cargo. Due to the berthing of vessels as the dredge level required is more, the lateral movements of soil will also be more. Where the land side forms an approach to the berthing structure, the soil should be retained. Thus in order to achieve the lateral movements of soil and lateral loads caused by the land side earth pressure, the structure consisting of diaphragm wall is to be constructed. The study on the behavior of diaphragm wall is required with respect to the supporting piles of the structure. The analysis was carried out in STAAD-Pro software by idealizing the soil as classical Winkler foundation-beam on elastic springs. In this paper, the behavior of diaphragm wall and supporting piles consisting of four models are discussed. Model 1) T-Diaphragm wall at sea side and Six vertical piles. 2) T-Diaphragm wall at land side and Six vertical piles. 3) T-Diaphragm wall at sea side, Four vertical piles and One raker pile. 4) T-Diaphragm wall at land side, Four vertical piles and One raker pile. From the analysis point of view all the systems are within the permissible limit of deflection, except the Model 2. This is because of surcharge acting in addition to the lateral earth pressures resulting in more deflection. But in case of Model 4, the deflections are controlled to a large extent because of placing the raker pile. From all the systems evaluated, the systems with diaphragm wall located at sea side are favourable than diaphragm wall located at land side. If the diaphragm wall is needed to be constructed at land side, the system with raker pile is more efficient, especially when the soil is weak.