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结合珠海市某软基工程中大型深沉井的设计施工实例,分析了侧壁摩阻力的特点,提出了使用阶段侧壁摩阻力采用的模式,分别讨论了大型深沉井在不采取抗浮措施、配重抗浮以及利用侧壁摩阻力来抗浮的三种方案,论证了在使用阶段考虑侧壁摩阻力来抗浮的合理性。经过工程实践证明,按照建议模型考虑使用阶段的侧壁摩阻力,在保证安全的同时能够有效的减小井体的壁厚、底板厚度及配重设置,取得了良好的经济效益,可供类似工程参考。
Combined with the design and construction examples of large deep wells in a soft foundation project of Zhuhai City, the characteristics of the frictional resistance of the sidewall are analyzed and the modes adopted for the frictional resistance of the sidewall are put forward. The effects of antiflation measures, Counterweight floating and the use of the friction resistance of the side wall to float the three options to demonstrate the use of the side wall friction resistance to consider the rationale for anti-floating. After engineering practice, it has been proved that considering the side wall frictional resistance of the use stage according to the proposed model, the wall thickness, floor thickness and weight setting of the well body can be effectively reduced while ensuring safety, and good economic benefits are obtained, Engineering reference.