兰州市某深基坑支护坡体变形分析与处理

以兰州市安宁区一深基坑工程为背景,对该基坑在开挖过程中支护坡体的变形原因进行了全面地分析,并及时采取临时处理措施防止坡体继续变形,待变形控制后,通过验算给出了合理的基坑支护方案。通过有限元软件建立有限元计算分析模型,对比分析了锚杆未施加预应力和施加预应力的工况下基坑的变形,计算表明预应力对控制基坑变形有明显的效果,计算分析结果为给出合理的支护方案提供了可靠的依据。经过对比分析找出了基坑变形产生的原因,为了避免类似工程事故的发生,给出了类似基坑工程的设计、施工和管理方面的建议。

Research on Stability Calculation Methods for Grillage Supporting Structure with Pre-stressed Anchor

Aiming at prestressed anchor cable frame in the presence of reinforcement landslide problem, through the selection of test points, the paper study and tested soil pressure, frame internal force and prestress losses under prestressed anchor cable frame beam, reveal the law of internal force distribution, and provides a theory basis for the rational design of prestressed anchor cable in landslide.