In the project of deep excavation pit supported by piles with prestressed anchors

the soil pressures acting on the pile and pile body displacement are nonlinearly changed. For the nonlinear change issue

based on displacement soil pressure model

considering the influence of the displacement of supporting structure

a calculation formula of mixing method is derived. The mixing method can effectively track the deformation process of supporting structure

and reflect the nonlinear function relationship between soil and the pile. Combining with the engineering practice

the MATLAB program is compiled; the nonlinear relationship between earth pressure and pile body displacement is well reflected by the calculation results; the calculated results are analytically compared with Lizheng software. It is shown that they can anastomose each other well so as to prove that

this calculation method has wide applicability and a good reference value for deep excavation pit supporting structure design.