ABSTRACT
Horizontal site characterization technologies present a rapidly evolving alternative to traditional vertical site investigation methods for subsurface investigations. This paper presents a rational methodology for the selection and deployment of horizontal site investigation techniques in trenchless construction projects. The methodology enables the user to define and quantify specific risks associated with a particular project, as well as to evaluate the degree to which these risks can be mitigated using various site characterization techniques. The proposed model is demonstrated using a working example. The paper concludes with a discussion of future trends in this field.
