Method, system and device for building a wall in the ground

摘要

A wall (43) is built in the ground (2) by pulling a wall building device (30) having cross-sectional dimensions which are substantially equal to the dimensions of at least a part of the cross-section of the wall through the ground, at least a part of the wall being formed by injecting a hardenable material behind the wall building device. A tunnel is made by first making a tunnel wall, leaving the ground inside the tunnel wall substantially intact, followed by excavating the ground inside the tunnel wall.