To restore plural underground water veins cut off by steel pipe column row earth retaining walls.

Steel pipe column row earth retaining walls A, A having earth retaining walls A2 of only soil cement are created by sandwiching the construction ground C. In that case, in execution work for respectively cutting off underground water veins D1, D2 by the steel pipe column row parts A1 and the soil cement wall parts A2, mutual steel pipes 1, 1 are connected by using drivable joints 2 of grand anchors, and water passing pipes 6 are arranged in the joints to the cutoff underground water veins D1 of the steel pipe column row parts A1. Water passing holes 5 are excavated and formed through the steel pipes 1 to the cutoff underground water veins D2 of the soil cement walls A2 to individually flow and restore the respective underground water veins D1, D2.