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首页> 外文期刊>Australian Geomechanics >CLASS A PREDICTION VERSUS PERFORMANCE OF O-CELL PILE LOAD TESTS IN SYDNEY SANDSTONE
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CLASS A PREDICTION VERSUS PERFORMANCE OF O-CELL PILE LOAD TESTS IN SYDNEY SANDSTONE

机译：悉尼砂岩中O形桩荷载测试的A类预测与性能对比

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摘要

As part of the Barangaroo South project, pile load tests were carried out on two prototype rock socketed piles (SC-01 and SC-02) in Sydney Sandstone to validate the design. The pile load tests were carried out using the bi-directional O-Cell method on 750 mm diameter piles having rock socket lengths of 7.85 m (SC-01) and 6.38 m (SC-02). The target O-Cell test load was 17 MN, giving a total potential maximum test load of 34MN (i.e. shaft plus base) on each pile. Once the testing reached the required target test load, the O-Cell was loaded to its maximum capacity of about 26 MN. Assuming the O-Cell load recorded beyond the calibrated range is valid, the maximum test load reached is equivalent to a total capacity of 52MN on each pile. Prior to the O-Cell testing of the first test pile (SC-02), a Class A prediction was carried out. In this paper, actual test pile load-deformation results are compared to the Class A prediction, together with a back-analysis of the O-Cell testing using numerical methods for calibration of rock stiffness and assessment of top-load pile response.
机译：作为Barangaroo South项目的一部分，在Sydney Sandstone的两个原型嵌岩桩（SC-01和SC-02）上进行了桩载荷测试，以验证设计。使用双向O-Cell方法对直径为750 mm的具有7.85 m（SC-01）和6.38 m（SC-02）的嵌岩长度的桩进行桩载荷测试。 O-Cell的目标测试载荷为17 MN，每个桩的总潜在最大测试载荷为34 MN（即轴加基座）。一旦测试达到所需的目标测试负载，O-Cell就会加载到最大容量约26 MN。假设记录的O电池载荷超出校准范围是有效的，则达到的最大测试载荷等于每堆52MN的总容量。在对第一个测试桩（SC-02）进行O-Cell测试之前，进行了A级预测。在本文中，将实际的测试桩荷载变形结果与A类预测进行了比较，并对O-Cell测试进行了反分析，使用数值方法对岩石刚度进行了校准，并评估了最高荷载桩的响应。

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