Analysis of Deformation Characteristics of Ultra-deep Foundation Pit Excavation Under Complex Environmental Conditions
In order to improve the excavation quality of deep foundation pit under complex conditions,the paper monitored the variation rules of lateral deformation of deep soil,settlement of retaining pile,settlement of road and surrounding surface settlement during the excavation of foundation pit in combination with the practice of a construction project.The results show that with the progress of foundation pit excavation,the increasing rates of settlement are 0.11～0.3,0.03～0.08,0.033～0.054 mm/d,respectively.The maximum lateral displacement occurs at a depth of 1 m and reaches 19.8 mm.The settlement of the largest envelope pile is 28.7 mm;The maximum surrounding road settlement is 8.4mm;The maximum surface settlement is 8.1mm,which is less than the design warning value,indicating that the foundation pit enclosure structure used in this project is safe and reliable.
Deep foundation pitComplex environmentDeformation characteristicsSettling capacity
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