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以北京地铁10号线亮马河车站北侧深基坑支护为例,阐述了应用钻孔灌注桩及预应力土层锚杆(索)的设计与施工,并以现场监控量测数据为依据,分析了桩锚护壁体系的安全稳定性,得出了一些初步结论,对土质地层钻孔灌注桩及预应力土层锚杆(索)的设计与施工有一定的参考价值。从施工效果来看,柔性支护比刚性支护更能真实反映基坑变形及安全状态,施工质量和过程支护监测对深基坑安全的控制效果较好,可在同类地下工程中推广应用。
Taking the deep foundation pit support on the north side of Liangmahe Station of Beijing Metro Line 10 as an example, the design and construction of bored piles and prestressed soil anchor bolts (cables) are described. The measured data of on-site monitoring are Based on the analysis, the safety and stability of the pile-anchor system are analyzed and some preliminary conclusions are obtained. It is of some reference value to the design and construction of bored piles and prestressed soil anchor (cable) in the soil layer. From the perspective of construction effect, flexible support can reflect deformation and safety status of foundation pit more accurately than rigid support. Construction quality and process support monitoring have good control effect on safety of deep foundation pit and can be widely applied in similar underground projects .