Detachable remolded silt hollow cylinder sample preparation device and use method thereof

Abstract

The invention discloses a detachable remolded silt hollow cylinder sample preparation device which comprises a bearing platform and outer walls, wherein a bearing platform bracket is arranged at the bottom of the bearing platform; the outer walls are fixed on two sides of the upper surface of the bearing platform; the inner sides of the outer walls are provided with a mechanical device for controlling the disassembly of a sample loading consolidation cylinder; the sample loading consolidation cylinder is arranged in the center of the bearing platform, and a hollow cylindrical drainage body concentric with the sample loading consolidation cylinder 1 is arranged in the center of the sample loading consolidation cylinder 1; the bottom of the drainage body is fixed with the drainage base on the back surface of the bearing platform and the bearing platform through fixing bolts; a drainage hole communicated with the drainage body is formed in the drainage base; and the drainage hole is connected with a drainage hose. The invention has the following technical effects: 1, the demoulding disturbance is reduced, and the uniformity of the sample is protected; and 2, moving and secondary sample cutting are avoided, and interference of other factors is avoided. The whole sample preparation process is carried out on the device bearing platform, no movement or secondary sample cutting is carried out on the sample, the sample preparation period is shortened, and the working efficiency of related tests is effectively improved.

Description

technical field [0001] The invention relates to the field of rock and soil engineering indoor test sample preparation, in particular to a device and method for preparing a remolded silt hollow cylinder sample. Background technique [0002] In the actual research of geotechnical engineering, in order to explore the mechanical properties of the soil under the conditions of earthquake load, traffic load, wave load, etc., it is often necessary to use the hollow cylindrical torsional shear instrument to carry out the test of the hollow cylindrical sample under the rotation path of the principal stress axis. Research. Among them, the most ideal sample is the undisturbed soil sample deposited naturally, because the undisturbed soil sample can truly reflect various mechanical properties of the soil under natural conditions. However, the existing undisturbed soil sample preparation methods significantly disturb the soil, easily produce cracks and are difficult to restore. Moreover,...

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Problems solved by technology

[0003] In the prior art, the preparation method of the hollow cylinder remolding soil sample is generally to form a hollow cylinder sample by compaction method, and add saturation measures before the test, such as the publication number is CN206671021U, and the name of the invention is: a hollow cylinder remolding soil The patent document of the sample preparation device; the operation in the actual application process recorded in this document involves the movement of the sample and secondary cutting, which is easy to cause damage to the sample, and the uniformity of the sample is difficult to be guaranteed.

Or through direct pressurization such as the vacuum preloading method, the sample is further processed after the mud is pressurized and consolidated, such as the publication number is CN103900872A, and the name of the invention is: vacuum preloading of remodeling soft clay hollow cylinder sample However, it does not take into account the interference of the sample stability caused by the direct removal of the mold during the demolding process and the error of artificially controlled demoulding.

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