地下结构抗浮设计讨论

Discussion on Anti-floatation Design of Underground Structure

近年来,大规模的地下空间开发使得抗浮设计越来越受到重视,其中抗浮措施的选择及浮力产生的机理是抗浮设计的关键。由于土体的复杂性,浮力产生的机理尚不明确,有待于进一步的研究。该文通过对浮力机理相关文献的评述,认为综合考虑不同含水层之间的渗流以最终确定浮力的计算原则是合理的。如此计算浮力更加准确,但需详尽的水力勘测资料。最后,以海八路隧道工程为例,确定抗浮措施并按照传统方法进行抗浮设计。

In these years, the design of anti-floatation increasingly attracts people’s eyes due to the development of the underground space by the large scope. The selection of anti-floatation measures and the mechanism of producing the buoyancy are the keys of the anti-floatation design. Through the description of the relative literatures of anti-floatation mechanism, the article considers that it is reasonable to comprehensively consider the seepage among the different containing water layers by the calculating principle of finally determining the buoyancy. It is more correct to calculate the buoyancy thus, but it is required to have the exhaustive hydraulic reconnaissance materials. Finally, the anti-floatation measures are determined according to Haiba Road Tunnel Project and the anti-floatation design is based on the traditional method.