The subject of this thesis is the execution construction pit for multi-storey car-park building in
Ljubljana. The supporting structure was made with high pressure grouting (e.q jet grouting),
and anchored with temporary ground anchors in one or two levels. An overview of jet
grouting and temporary ground anchors procedures accoding to current standards is shown.
A special attention is put on the currently valid execution of works in our country. We
primarily examined the problems occurring due to the deviation from technical regulations or
inability to stick to them, which may be the consequence of either old equipment or sticking
to generally accepted procedures of the execution, as well as requirements for a cheaper
The thesis presents the description of experiences gained during the execution works, the
results of control examinations, the problems that occurred during the execution and
appropriate solutions. In the phase of the jet-grouting-piles execution, which were used as a
supporting structure, the attention was on the technology of the single fluid system and its
effectiveness in the ground, while with ground anchors the most attention was paid to ground
anchor installation and.
The problems occurring on the construction site are often result of an incomplete project
documentation, often involving the old and incomplete documentation of neighbouring
buildings. The solution of issues in relation to the unexpected ground conditions, which
significantly delayed the execution of works, is examined.