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首页> 外文期刊>Australian Geomechanics >PERFORMANCE EVALUATION OF A 21 M DEEP EXCAVATION STABILISED BY COMBINED SOIL NAILS AND ANCHORS - A CASE STUDY
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PERFORMANCE EVALUATION OF A 21 M DEEP EXCAVATION STABILISED BY COMBINED SOIL NAILS AND ANCHORS - A CASE STUDY

机译：土钉与锚杆结合稳定的21m深基坑的性能评价-案例研究。

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摘要

The design and construction of deep basement excavations requires careful analysis with respect to the staging and support of the excavation works. In urban environments, these issues are even more critical due to the potential for settlement of adjacent structures. Hence an understanding of the overall stability and ground deformation becomes paramount. In this paper, case study of a 21 m deep excavation adjacent to a 4 story residential building in soil alluviums in Tehran is presented. A combination of high pressure grouted soil nails and anchors was adopted to provide lateral support. Finite element and limit equilibrium analyses were conducted to predict the performance of this deep excavation and to evaluate the impact of the excavation on the existing adjacent structure. Displacements and anchor loads were monitored during various stages of the construction. Monitoring results and numerical predictions of displacements and reinforcement forces correlate well. The level of correlation between the parameters predicted in design and the measured results from monitoring lends credibility to the design methods adopted and should give confidence in their use to achieve safe design and construction of future excavations.
机译：深地下室开挖的设计和施工需要对开挖工程的阶段性和支护进行仔细的分析。在城市环境中，由于可能存在相邻结构的沉降，这些问题甚至变得更加关键。因此，对整体稳定性和地面变形的理解变得至关重要。本文以德黑兰土壤冲积层中一栋四层居民楼附近的21 m深开挖为例。采用高压灌浆土钉和锚钉的组合来提供侧向支撑。进行了有限元和极限平衡分析，以预测该深基坑的性能，并评估该基坑对现有相邻结构的影响。在施工的各个阶段均监测位移和锚固载荷。位移和增强力的监测结果与数值预测之间具有很好的相关性。设计中预测的参数与监测测量结果之间的相关性水平使所采用的设计方法具有可信度，并应使他们相信它们的使用可实现安全的设计和未来挖掘的施工。

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