Described is a method for the trenchless underground laying of pipes.
According to said method, a shield tunnel boring machine and then
subsequently pipes are driven through the ground starting from a starting
shaft. The shield tunnel boring machine produces a borehole whose
diameter is slightly greater than the outer diameter of the pipes. The
annular space between the borehole wall and the pipes thereby obtained is
filled with a supporting and lubricating agent. During advance, a
continuous and periodical examination of the composition of the ground is
carried out in the area of the shield tunnel boring machine or the first
pipe following the shield tunnel boring machine or the first lubricating
point. Depending on the result of the examination, the ground in the
examined area is sealed off and/or solidified by a sealing and/or
solidifying agent and/or the composition of the supporting and
lubricating agent is adjusted.