Monitoring Analysis on the Internal Action of Pile-Anchor Support System of Deep Excavation of Wangjing SOHO Plaza in Beijing

Abstract:

Based on the oversize deep excavation project of Wangjing Soho in Beijing, the stress monitoring of top beam, soldier piles and anchor strand were carried out, which shows the development process of the internal force caused by spatial member interaction, reflect the differences from the mechanics principal of the traditional design method such as elastic foundation beam or equivalence beam of limit equilibrium state. Monitoring practice reveals that soldier pile were under the combination state of compression and bending, and are proved safe because of low stress; while the top coupled beam is under the combination state of tension and bending, and the tensile stress might goes to the stress limit, which has much relationship to the anchor arrangement, so the design of top beam should be regarded as one of the key control of construction safety. The tensile force of anchor strand are not easy to be hold with the tapered-type anchorage in site, the actual tested tensile force reaches 150~220KN , only the half of the design value.

• Periodical: Applied Mechanics and Materials (Volumes 488-489)
• Pages: 312-315
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.488-489.312
• Online since: January 2014
• Authors: Xiao Min Zhou*, Zeng Fu Lai, Eric Boda
• Keywords: Anchor Support System, Deep Excavation, Oversize Pit, Pile System, Stress Monitoring

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