ABSTRACT
Trenchless technologies such as pipe jacking and microtunneling have been used progressively in the installation and renovation of underground pipelines in urban areas owing to little disruption to traffic and nearby businesses (Struzziery et al. 1998). Compared to open-cut methods, the soil data is seen indirectly for trenchless methods, which may bring high risks during construction. Therefore, it is fundamental to develop a favorable method for detecting the subsurface conditions at a site.
