双排桩支护深基坑受力形态分析

Double Piles Force Morphological Analysis of Deep Foundation

双排桩在支护工程中得到了很好的应用,以基坑开挖为例,建立了数值模型,分析了开挖过程中基坑的变形及双排桩的受力形态,分析结果显示:双排桩支护下即可变形较小,坑壁最大水平位移主要发生在坑壁的中下部,基坑坑底的隆起位移较大,双排桩中内侧外侧桩桩身弯矩分布有所区别,随着开挖步数的增加变形和受力的增加规律也有所不同,应该在基坑开挖过程中注重监测,以便于控制基坑的安全性。

The application of double-row piles in support engineering has been very good. Taking the excavation for example, the numerical model was established to analyze the pit deformation and pile stress patterns during the excavation, and the results show that： under double piles the pit has small deformation, the maximum hori- zontal displacement occurs mainly in the middle and lower walls of the pit, pit crater floor uplift larger displace- ment, double pile medial lateral pile body moment distributions differ, with the excavation deformation and in- crease the number of steps to increase the force of law are different. In order to control the security pit, we should pay attention to monitoring during excavation.