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Optimization of Breakwater and Quay Structures for the Port of Haifa Expansion Using Performance-Based Seismic Design

机译:基于性能的地震设计优化HAIFA扩展港的防水和码头结构

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This paper addresses key considerations for the design of the expansion of the Port of Haifa, Israel container terminal in an area of moderately high seismicity for the development of several breakwaters/revetments and quays. Design-level ground motions were associated with a M 7.0 earthquake. The proposed port development is also exposed to waves from the Mediterranean Sea. The soil conditions posed several challenges for both static and seismic deformation potential. Both the reclaimed sand and some of the underlying dune sand were determined to be potentially liquefiable. In addition, a layer of soft clay resulted in the potential for excessive settlements and/or low bearing capacity for gravity-based structures. Furthermore, there was a shortage of available sand for reclamation in the dredging areas within the Port, requiring the sourcing of significant reclamation fill from an offshore borrow pit which contained sand with a relatively high fines content. Finally, the proposed terminal is located in environmentally sensitive Haifa Bay, resulting in strict limitations on dredging operations to protect marine life. In order to address these challenges and optimize the design, both static and seismic analyses, using a displacement limit approach, were carried out for breakwater, revetment and quay structures, and these, along with coastal and construction considerations, were used to: (1) select the most cost effective structure types, and subsequently, and (2) optimize their configurations. Analyses considered the quality of the reclamation fill, compaction using vibrocompaction and/or stone columns, and environmental concerns related to dredging and reclamation.
机译:本文涉及在适度高地震性地区开发多种击穿和码头的震荡的面积中,展示了海法港口扩张的关键考虑因素。设计级地面运动与M 7.0地震有关。拟议的港口开发也暴露于地中海的波浪。土壤条件为静态和地震变形潜力构成了几个挑战。再生沙子和一些潜在的沙丘砂都被确定为潜在的液化。另外,一层软粘土导致电位过度沉降和/或基于重力的结构的低承载能力。此外,在港口内的疏浚区域中,可用的沙子缺乏可用的沙子,需要从海上借用坑采购含有相对高的罚款含量的砂坑。最后,拟议的终端位于环保敏感的海法湾,导致疏浚操作保护海洋生物的严格局限性。为了解决这些挑战并优化设计,使用位移限制方法的静态和地震分析进行防波堤,护垫和码头结构,以及沿海和施工考虑,习惯于:(1 )选择最具成本效益的结构类型,随后,(2)优化其配置。分析考虑了填海填充的质量,使用振动混合和/或石柱压实,以及与疏浚和填海有关的环境问题。

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