“自稳式”倾斜桩在深基坑中的设计与应用

Design and Application of "Self Stabilizing" Inclined Pile in Deep Foundation Pit

文中以实际落地深基坑工程为例,通过启明星FRWS9.0软件内力与变形计算发现,“自稳式”倾斜桩的受力模式区别于双排桩,更接近于桩锚体系,前排斜桩轴力分解为水平和竖直两个方向,为桩顶提供了一定的水平支撑力。通过实际监测数据分析,得到“自稳式”倾斜桩能够在深基坑中有效地控制土体位移,并且对比前后排桩体在水平和竖直两个方向的变形量可以侧面印证前排斜桩的自撑作用。与传统的围护体系相比,“自稳式”倾斜桩具有施工方便、缩短工期、绿色施工、节约成本等优势。最后对该围护体系在深基坑中的应用问题进行了阐述,对其发展前景进行了展望。

Taking the actual landing deep foundation pit project as an example, through Qixing frws9 0 software internal force and deformation calculation, it can be found that the stress mode of "self stable" inclined pile is different from that of double row pile, which is closer to the pile anchor system. The axial force of the front inclined pile is decomposed into horizontal and vertical directions to provide a certain horizontal support force for the pile top. Through the analysis of the actual monitoring data, it is obtained that the "self stable" inclined pile can effectively control the soil displacement in the deep foundation pit, and the self-supporting effect of the front inclined pile can be confirmed by comparing the deformation of the front and rear rows of piles in the horizontal and vertical directions. Compared with the traditional enclosure system, the "self stabilizing" inclined pile has the advantages of convenient construction, shorter construction period,green construction and cost saving. Finally, the application of the retaining system in deep foundation pit is described and its development prospect is prospected.