Abstract
Taking the design of a deep and large foundation pit near the Yangtze River in Wuhan as an example, combining with the complex environment around the foundation pit and considering the development sequence of the construction unit, the work scheme of "zoning design, zoning construction, supporting pile + internal support" is adopted. In order to reduce the influence of foundation pit excavation on adjacent excavation, piles with large diameter and small pile spacing are used as isolation piles. Using 90 deep dewatering Wells and cement mixing pile (local CSM) as water stop curtain, the calculation can meet the requirements of foundation pit dewatering. The existing monitoring data show that the design of the foundation pit is safe, reasonable and economical, which can provide a certain reference for similar projects.
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