ABSTRACT
This chapter presents an effective back-analysis model to obtain befitting m-values. Since practical m-values are found, the lateral displacements of foundation pits are well predicted. The chapter discusses a sort of finite elements method adopted in calculating internal forces and lateral displacements for piles in row or diaphragms. The method has been widely used in practical engineering for its convenience and validity. The elastic-reaction method has been widely used in practical engineering for its convenience and validity. The solutions calculated with the method are effective on condition that the m-values, proportional coefficients of lateral subgrade reaction, are consonant with the field soils. Monitoring points should be set as many as possible to ensure reliable results. The soils inside of pits simulate the Winkler soil model for bearing piles. The model is composed of lumped horizontal springs.
