MULTIPLE PIEZOMETER AND APPLICATION OF SUCH A PIEZOMETER

摘要

the system (1) which is intended to be inserted into a drill hole (3), on the one hand, the rigid measurement bands (b1, b2,...) designed to be placed at predetermined distances from the axial direction of the hole, the outer diameter of the ring is smaller than the diameter of the measuring hole drillinginflatable seal and means (e) associated with the band, to be applied against the wall (4) of the drill hole (3) and to determine, in conjunction with the rings.a number of annular zones of measurement (m1, m2...mn) at the level of these rings, as limited in the radial direction of the outer wall of the drill hole (4).these areas were also isolated from the internal volume of the hole and separated from each other, and, on the other hand.the measurement means (12) for measuring the pressure in the annular zones, these measures are related to the surface by pipes (14) or the like.and how to have (25, 18, 15) connected to a fluid pressure sealing means for the inflation thereof.