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针对珠江黄埔大桥南汊悬索桥锚碇基坑支护的工程特点,利用有限元法对其施工过程进行了仿真分析,并与现场监测结果进行对比.结果表明:圆形嵌岩地下连续墙的拱效应显著,能够有效减小墙体竖向应力、侧向位移以及墙后地面沉降;墙体侧向位移和坑底隆起量随开挖深度增大迅速增加并逐渐趋于平缓;基岩的嵌固作用对墙体的变形和受力特性也有显著影响.结论可以为今后类似工程的设计提供理论依据和实践参考.
According to the engineering characteristics of the anchorage foundation pit support for the Nanxun Suspension Bridge of Zhujiang Huangpu Bridge, the construction process is simulated and analyzed with the finite element method and compared with the field monitoring results.The results show that: Which can effectively reduce the vertical stress, lateral displacement and ground settlement behind the wall; the lateral displacement and the pit uplift of the wall rapidly increase and gradually tend to be gentle with the increase of excavation depth; The solidification has a significant influence on the deformation and stress characteristics of the wall.Conclusions can provide theoretical basis and practical reference for the design of similar projects in the future.