In-situ test was conducted for the prestressed anchor rope composite soil nailing of a deep foundation pit for the Shenzhen Holiday Plaza to study the characteristics,the mechanism of interaction between soil nailing,prestressed anchor rope and soil,and the response of retaining structure to changes in the external environment,such as foundation pit excavation,anchor rope tension and rainfall.

According to the characteristics of the prestressed composite soil nailing walls,a new type of prediction deformation model is constructed——Verhulst model through analyzing the operation mechanism and influential factors during excavation and use of the walls,which is used to assess the deformation of prestressed composite soil nailing walls to provide effective evidence for the design.