软土地基双排钢板桩围堰数值分析

采用Plaxis软件对软土地基双排钢板桩进行数值分析,验证了双排钢板桩两侧设置踢脚的重要性和必要性,论证围堰填筑及降水速率等因素对工程安全的影响并进行微观模拟量化研究。结果表明:为更好地提高工程围堰的安全稳定性,普通软土区域的钢板桩插入深度最好为基坑开挖深度的1倍以上;踢脚应依据软土分布及深度情况合理进行设置;钢板桩围堰的施工期应控制合理的进度。研究成果为类似工程的设计施工提供参考。

Numerical analysis double-row steel sheet pile cofferdam for soft soil foundation

With Plaxis software，a numerical analysis on double-row steel sheet pile cofferdam for soft soil foundation is made，and then the importance and necessity of placing toe-board on both the sides of the double-row steel sheet pile are verified，while a study of micro-simulation and quantification on the impacts from the factors of cofferdam filling and water-lowering rate on the safety of the project is made as well. The result shows that the inserted depth of steel sheet for the conventional soft soil area is better to be more than one times of the excavation depth of the foundation pit，the toe-board must be reasonably placed according to the distribution and depth of the soft soil and the progress of the construction period must be reasonably controlled，so as to enhance the safety and stability of the cofferdam. This provides some references for both the design and the construction of the similar project.