This paper describes the design, driveability and deflection monitoring results of a piled cantilever retaining wall at Port Hedland, Western Australia. The retaining wall was required to stabilise an existing access road and conveyor foundations to an existing wharf, prior to the dredging operations for a new export facility in the port. By designing the dredging profile (in front of the retaining wall) as an underwater batter, a cantilever retaining type structure made up of steel tubular piles was found to be feasible. The stability and deflection criteria requirements indicated that some of the retaining wall piles were required to be driven to a toe level of-30 mCD, penetrating through approximately 25 m thick very weak to medium strength rock. General experience of driving piles at Port Hedland area is that the piles are very likely to refuse on a 4 m thick medium strength Conglomerate rock layer starting at about -14 mCD. The piles equipped with external and internal shoe thickening were found to be easier to drive. Measured wall deflections were found to be lower than the initially predicted deflection due to difference in the as-built dredging profile and the assumed design dredging profile. The predicted wall deflection was found to be very similar to the measured deflection when a re-analysis was carried out considering the post dredging as-built batter slope profile. Data from static tension load test carried out on a 610 mm OD and a 1050 mm OD piles for wharfs near the retaining wall is also provided.
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机译：本文介绍了西澳大利亚州黑德兰港的一堆悬臂式挡土墙的设计，可驱动性和挠度监测结果。在港口新出口设施的疏operations作业之前，需要使用挡土墙来稳定现有通道和通往码头的输送机基础。通过将挖泥型材（挡土墙的前面）设计为水下击球手，发现由钢管桩组成的悬臂式挡土结构是可行的。稳定性和挠度标准要求表明，一些挡土墙桩需要打入30 mCD的脚趾水平，穿透大约25 m厚的非常弱至中等强度的岩石。在黑德兰港地区打桩的一般经验是，从-14 mCD开始，在4 m厚的中等强度砾岩层上，桩很可能会拒绝。发现带有外部和内部鞋加厚件的桩更容易打桩。由于在建挖泥船轮廓和假定设计挖泥船轮廓之间的差异，发现测得的墙体挠度低于最初预测的挠度。当考虑到疏dr后建成的面糊坡度轮廓进行重新分析时，发现预测的墙体挠度与实测挠度非常相似。还提供了在610 mm外径和1050 mm OD外径的挡土墙附近的码头上进行的静拉力测试的数据。
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