ABSTRACT

The artificial island project of the Hong Kong-Zhuhai-Macao Bridge includes the island construction project, the island part at the junction of the island and the tunnel, and the transition section between the island and the tunnel. The bearing capacity and deformation characteristics of the compacted sand pile composite foundation are studied through the load test of underwater compacted sand pile composite foundation, and given the parameters such as pile-soil stress ratio of composite foundation. In addition, the numerical simulation analysis of the three-dimensional foundation model of the West artificial Island was carried out. The parameters were adjusted through back analysis of the calculated results and the measured data, and the adjusted parameters were used to calculate the post-construction settlement of the West artificial Island, which met the design requirements of no more than 50 cm.

摘要

港珠澳大桥人工岛工程包括岛建设工程、岛与隧道交界处的岛部、岛与隧道之间的过渡段。通过水下压实砂桩复合地基荷载试验研究压实砂桩复合地基的承载力和变形特性，给出复合地基桩土应力比等参数。此外，还对西部人工岛三维地基模型进行了数值模拟分析。通过对计算结果和实测数据进行反分析，对参数进行调整，并将调整后的参数用于计算西人工岛的工后沉降，