Method for producing a loose rock sample body and static triaxial device

摘要

Method for producing a cylindrical fully liquefied specimen (15), the internal structure of which corresponds to a loose rock structure resulting from demonstrably complete liquefaction and subsequent consolidation, characterized by the steps, -transfer an earth-moist, loose and macroporous undiluted sample material into a one-sided open cylindrical cavity formed by a cylindrical specimen base plate (11) arranged at one end of a hollow cylindrical elastic sheath (13), wherein the elastic sheath (13) is held in a hollow cylindrical shape by a hollow cylindrical filling support element arranged on the outer sheath surface of the elastic sheath (13), wherein an inner diameter of the hollow cylinder of the filling support element corresponds to the outer diameter of the elastic sheath (13), -Closure of the elastic sheath (13) at the other end with a cylindrical specimen head plate (3) forming a cylindrical non-liquid specimen (12), -Application of a vacuum in the liquid sample formed as a closed cylinder (12), -Remove the filling support element, -Arranging a test support element formed as a hollow cylinder (4) on the outer sheath surface formed by the elastic sheath (13) of the liquid sample formed as a closed cylinder (12), wherein an inner diameter (di,z) of the hollow cylinder of the test support element (4) is greater than the outer diameter of the elastic sheath (13), -insertion of the closed cylinder filled with the sample material and the test support element (4) into a triaxial cell of a static triaxial device (100), -Consolidation of the undiluted specimen (12) in the static triaxial device (100), -Saturation of the undiluted specimen (12) with water, whereby saturation is increased by applying a counter pressure in the triaxial cell surrounding the specimen (12), -Undrained passive compression of the undiluted specimen (12) until complete liquefaction, whereby the liquefaction of the fully liquefied specimen (15) is controlled by the measurement of the main voltages, -Consolidation of the fully liquefied specimen (15), -Supporting the fully liquefied specimen (15) after consolidation by applying a vacuum in the fully liquefied specimen formed as a closed cylinder (15), -Removal of the fully liquefied sample (15) from the triaxial device (100) -Remove the test support element (4).