软土地区双排钢板桩围堰计算分析

Calculation and analysis of double-row steel sheet pile cofferdam in soft soil area

双排钢板桩围堰因其具有受力性能好、止水效果好以及施工效率高等优点,而广泛应用于泵站、水闸、堤防等水利工程的施工中。本文结合广州市南沙区某泵站工程的施工围堰,采用工程设计规范中常用的计算方法,将双排钢板桩围堰简化为单排钢板桩+锚杆模型和重力式水泥土墙模型,利用理正深基坑软件对围堰宽度和稳定安全系数进行计算。结果表明,该方法适用于初定双排钢板桩围堰设计方案阶段。

Double-row steel sheet pile cofferdam has the advantages of good mechanical performance, superior water sealing effect and high construction efficiency, so it is widely used in the construction of pump station, sluice and dike. For the construction cofferdam of a pump station project at Nansha District of Guangzhou City, common calculation method in the design specification was used;double-row steel sheet pile cofferdam was simplified into single row steel sheet pile + anchor bar model and gravity cement soil wall model;the width and stability safety coefficient of cofferdam were calculated with Lizheng deep foundation pit software. The results of calculation demonstrate this method is applicable for preliminary determination of double-row steel sheet pile cofferdam scheme.