“…This Special Issue of the International Journal of Geosynthetics and Ground Engineering aims to provide the readers with selected contributions that are broadly within the area of underground structures, namely pipelines [1][2][3], tunnels and buried bridges [4,5], culverts [6], and buried wave barriers [7]. The contributions came from both the practicing engineers and the researchers to provide insights into the current state of practice as well as the recent developments in analytical solutions, numerical modeling and data analysis.…”