ABSTRACT
In engineering construction, due to the large excavation depth of the foundation pit and the close distance between the edge of the foundation pit and the adjacent existing buildings, a single supporting form is often difficult to meet the design requirements. The supporting structure composed of more than two supporting forms is often a better choice. At present, pile-anchor-bracing composite retaining structure has been successfully applied in many deep foundation pit projects. According to the analysis of the measured data of pile displacement in the site, and the expression of the potential energy is derived for the pile-anchor-support composite retaining structures. Based on the principle of minimum potential energy, deriving the analytical solution of the maximum horizontal displacement of the pile head; Using the formula for the calculation of the engineering example in this paper, the relative error between the theoretical calculation value of maximum displacement of the supporting pile head and measured value is only 12.9%, and the calculation result can meet the requirements of engineering precision.
