工程位于台北盆地软弱冲积地盘，为市区捷运交会车站前转弯段堆栈隧道（曲率半径210m）之联络通道。应用超高压三重管 RJP深层喷射搅拌工法理论，于联络通道开挖区四周设计强度型地盘改良区，开挖区内土体则俟潜盾隧道完成后，由隧道预留灌浆孔施灌二重管化学止水灌浆，藉由严谨之监造制度及精确之施工精度，堆栈式联络信道得以顺利且提前完工。

The issue crosspassage between the overlapping tunnels with 210m radius curvature is located in front of the MRT intersection station in soft alluvial Taipei Basin. Soil around the crosspassage was strengthening by the triple pipe jet grouting method (RJPRodin Jet Pile) before boring tunnels. The soil between tunnels was improved by chemical grouting via the preinstalled holes in segments. Under intimate cooperation between the owner conscientious supervision and contractor technical construction , the crosspassage was successfully completed before the date.