| 摘要 |
<p>The hydraulic load-cell with multiple jacks incorporates instruments which measure the displacement and the applied force, and may be deployed in soil mechanics for building foundations. The unit is placed in a pre-bored hole and a hand-lever used to augment hydraulic fluid pressures and effect the moving apart of two opposed vertical test plates. The hydraulic circuit which feeds the jacks may be hermetic and may be controlled by a volumetric jack. The volumetric jack may be controlled by an hydraulic pump and its piston may extend in the form of a rod to support an index pointer. As the piston displaces, so the finger moves over a graduated scale indicating the displacement of the test-plates.</p> |
