Abstract: The deep foundation pit was located in the CBD region in Zhujiang Newtown in Guangzhou, which had the following characteristics, the high excavation depth, the poor property of soil and the complex around environment. The general situation and design of this deep foundation pit was introduced, which included two support structures: the manual hole digging pile and prestressed anchor retaining structure and the manual hole digging pile and concrete internal bracing support structure, and the Finite element method analysis was used to calculate the effect of manual hole digging pile and prestressed anchor retaining structure. The rationality and reliability of design was verified by the comparison between FEM analysis data and monitoring data.

Key words: deep foundation pit, manual hole digging pile, pile\, anchor retaining structure, finite element method, MIDAS-GTS