Abstract: Method and apparatus are described for producing underground installations of concrete pipe, in which a shaft is sunk into the ground at each of two spaced locations between which the concrete pipe is to be installed, an annular slipform-shield is disposed in one shaft, holes are bored through the ground from the other shaft to the slipform-shield, and cables are passed through the holes and are attached to the slipform-shield. The cables are then used for pulling the slipform-shield towards the other shaft while concrete is simultaneously fed to the trailing section of the slipform-shield to thereby fill the resulting void by a cast tubular layer of concrete embedded in and supported by the ground. After the cast concrete has set as a hardened tubular layer, the soil from within it may be removed.