The concept of our patented "Stop-End pipes E.L.®" is the base of our technology for building diaphragm walls. Our customers have successfully used this system in recent years. It requires the use of our "Stop-end pipes E.L.®" together with the clamshell grab type "BR", our flat chisel, and possibly "water-stop" seals.

MAIN CHARACTERISTICHS:

Guide channel for digging tools

The excavation of a follow-up panel is carried out by a "BR" clamshell grab, with the help of a special flat chisel if needed, both guided by the channel in the pipe. While digging, these tools clean the exposed side of the pipe. (see pict. C, F, L, M, N)

Stop-end pipe geometry

The trapezoidal design of the pipe, and its constructive characteristics, allows a spontaneous lateral movement after the excavation, making a delayed extraction very easy. (see pict. C)

Continuity of the panels

The continuity of two following panels is guaranteed even in the presence of small vertical deviations, because the excavation is guided along the stop-end pipe.

Working time optimization

With our method as opposed to other working system, there is no urgency to remove the stop end pipe. It can be left in place for days or even weeks before extraction.

Water-Stop

A water stop can be added to the stop-end pipe to improve water tightness between joints. The lateral movement of the pipe during extraction leaves the water-stop fixed in the concrete. (see pict. C)

Width of the pipe

Tecnosoil can supply "Stop-End pipes E.L.®" in various widths.It is also possible to attach plywood or other types of panels so that the same pipe can be used for wider excavations. For example, our 36" Stop-end pipe is commonly used for 48" excavations. (see pict. B, H)

Length of the pipe

The pipe pieces are supplied in various lengths, so that it can be assembled to the desired length in order to fit the depth of the excavation.