<p>Considering the superposition effect of the deformation field in construction, the interaction mechanism between adjacent excavations can be predicted accurately. A simplified constitutive model has been established to analyze soil movements and evaluate the environmental responses of adjacent excavations. Therefore, a numerical model that accurately characterizes the deflection of retaining structures can assist in evaluating the safety of engineering projects. Through comparing with discrete element simulations, the model is demonstrated to have superior accuracy in characterizing the superposition effect during adjacent excavations. The results derived from the proposed model exhibit a higher degree of correlation with field-measured data. The results indicate that the soil movements follow essentially the same curves under two retaining schemes during each stage of construction. The shear stress and strain behavior of the soil increase with varying distances. The superposition effect between synchronous and asynchronous construction schemes has a significant influence on soil movements between adjacent excavations near water bodies. Different retaining structure systems can be established to effectively control the unbalanced deformation of adjacent excavations.</p>