排桩+斜撑复合支护设计在某深基坑中的应用

Application of row pile+diagonal bracing composite supporting design in the deep foundation pit

利用有限元数值模拟结合现场施工运用,得到了在"排桩+斜撑"复合支撑作用下的基坑岩土体的受力及稳定性特征,且判断出了基坑最可能的破坏模式并非整体失稳而是上部局部破坏,经现场施工对比,验证了"排桩+斜撑"复合支护设计对基坑支护的合理有效性。

Using finite element numerical simulation,combining with field construction application,the essay concludes the force and stability property of foundation soil-body under ＂row pile＋ diagonal bracing＂ composite bracing,and finds out that the most possible damage mode of the foundation pit is not the overall instability but the upper local damage.Through in-situ construction comparison,it testifies the rationality and effectiveness of ＂row pile＋diagonal bracing＂ composite supporting design on foundation pit support.