A TAM pipe is smooth grouting tube with spaced ports (standard spacing is 330 or 500mm). These perforations are covered by rubber sleeves, also called "manchette", which act as non-return valves. With a double packer the injection can be carried out individually and repeatedly.
Injection treatments through sleeved grouting pipes are required in the following cases: Strengthening of foundations, which may be needed due to increased structural load, restoration of ancient buildings or the creation of underground spaces below them. Large excavation pits and earthworks, in order to waterproof or consolidate, as an alternative or in addition to diaphragm walls