Calculating method of earth pressure against retaining piles of pile-row retaining structure

On the basis of arching effect analysis, the earth pressure against the retaining pile of deep excavation can be divided into two parts: direct and indirect earth pressures. The direct earth pressure should be calculated by analysis of minor principal stress arch while the indirect earth pressure by analysis of major principal stress arch. The earth pressure calculated by arching rationale, which is curvilinear, is different from classical theory, and the proposed method it is properer by comparing to the measured data. The error of the calculation is checked and the application conditions of the equation is proposed.