Abstract:Because of located in a city, the construction of urban underpass is often limited by many conditions. The design of construction scheme is very important. And the supporting technology of foundation pit is the key of the construction scheme. Taking the tunnel undercrossing Tongting Street in Middle Weixian Road of Weifang City as an example, the construction scheme of Tongting Street Underpass is introduced, and the supporting technology of foundation pit is specially expounded, which can be referred for the similar projects.