抗拔桩在抗浮工程中的研究进展

随着城市地下空间的大规模开发,基础埋深不断增大,地下水的浮力也随之加大,易导致施工过程中基坑上浮或影响地下结构正常使用。抗拔桩因施工时对桩周岩土体扰动较小,工艺简单,施工便捷,抗浮效果好等优势,被广泛应用于抗浮工程中。目前,抗拔桩的力学特性、承载能力和变形特征等是现阶段抗拔桩在抗浮工程中的研究热点。本文主要从抗拔桩的作用机理、常见的破坏形式及极限承载力等方面进行了归纳分析,梳理了抗拔桩在数值模拟方面的研究进展,提出了抗拔桩在抗浮工程中存在的一些问题,并为抗拔桩在地下结构抗浮领域的未来发展提供了新的思路。

Research Progress of Uplift Piles in Anti-floating Engineering

With the great development of urban underground space, both the buried depth of the foundation and the buoyancy of the groundwater continue to increase, which may easily cause the foundation pit to float during the construction process or even affect the normal use of the underground structure. Uplift piles are widely used in anti-floating projects due to the advantages of less disturbance to the rock and soil around the pile during construction, simple process, convenient construction, and good anti-floating effect. At present, the mechanical properties, bearing capacity and deformation characteristics of uplift piles are the research hotspots of uplift piles in anti-floating engineering. The action mechanism of the uplift pile, common failure forms and ultimate bearing capacity are summarized and analyzed in this paper. The research progress in numerical simulation of uplift pile is summarized. Some problems of uplift pile in anti-floating engineering are put forward, and a new idea is provided for the future development of uplift pile in anti-floating field of underground structure.