The construction safety control analysis of super-deep and super-large foundation pit

摘要

The main tower of Wuhan Greenland Center is 600 meters tall and the excavation depth is 30.9 meters deep. The geological sedimentary characteristics and the safety effect of railway line near the Yangtze River should be considered, so the construction has typicality and larger reference value. The engineering support system, the arrangement of monitoring excavation scheme and the monitoring items with its warning value are introduced referring to the foundation pit construction of Wuhan Greenland Center. Then the safety of the excavation itself and influence on surrounding environment are analyzed in terms of the brace force, deep underground continuous wall horizontal displacement, underground water level and the original railway and the Yangtze River levee deformation law and so on. And the measures for safety of foundation pit excavation engineering are discussed at last.