| 摘要 |
The device comprises: a vertical tube 33 driven in over the entire depth of the zone to be probed, for example alluvial deposits located at right angles to a bridge pile 10; a series of pressure gauges 32 distributed over the entire length of the tube, each comprising a radially deformable element, internally subjected to a permanent static pressure and externally to the local support counter-pressure of the alluvial deposits, means of measuring deformations undergone by the deformable elements of these pressure gauges, this deformation resulting from the lowering of local support in the zone to be probed at the location of the pressure meter. <IMAGE>
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