Abstract
The purpose of this paper is to comprehensively quantify model error in geotechnical structural design methods, e.g. structural foundations, earth structures and retaining walls. Model errors for structural foundations and earth structures are summarized based on an extensive review of literature, and model errors in retaining walls are quantified in detail by statistical analysis based on collecting actual construction data and model experiment data. From the above, the basic information for conducting a geotechnical reliability analysis is presented. Furthermore, the challenges in geotechnical structural design are indicated from a model error perspective.