Seabed soft-soil layer preparation device and method for large-dimension physical model test

Abstract

The invention discloses a seabed soft-soil layer preparation device and method for a large-dimension physical model test, and belongs to the technical field of geotechnical engineering tests. The seabed soft-soil layer preparation device comprises a consolidation and sample preparation system, a monitoring and control system, and a counter-force loading system, wherein the consolidation and samplepreparation system is pressurized from the upper part under a certain water-head condition, and consolidates a soil sample under a double-sided water draining condition, and density of the soil sample is tested; the monitoring and control system can monitor state changes of the soil sample in real time through sensors arranged in a soil sample consolidation region and an upper loading region, sothat various physical and mechanical parameters, such as moisture content, soil pressure, pore water pressure and a pore space ratio, of the soil sample are obtained; and the counter-force loading system can apply stable and uniform consolidation pressure to the soil sample consolidation region, and can reduce and even eliminate influences of unsymmetrical pressure. Three systems cooperatively work, so that real-time feedback is realized, and sample preparation ends while needed sample preparation standards are reached. The device is strong in applicability, is easy in connection, is simple and convenient in operation, is good in sample preparation integrity, is uniform and consistent, and is also suitable for seabed soft soil and ultra-soft soil sample preparation.

Description

technical field [0001] The invention belongs to the technical field of geotechnical engineering tests, and relates to the preparation of saturated soft soil and supersoft soil samples in geotechnical model tests and unit tests, especially for the preparation of seabed supersoft soil samples for large-scale physical model tests of different scales. . Background technique [0002] Indoor geotechnical engineering tests include conventional geotechnical unit tests, normal gravity physical model tests and high gravity centrifugal physical model tests, etc. The development of these geotechnical engineering tests is the prerequisite for understanding the physical and mechanical properties of complex materials such as soil, and is also the basis for the verification, calibration and testing of various geotechnical engineering testing instruments, and it is also the basis for solving various complex geotechnical engineering in reality. the crux of the matter. The operation object o...

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Problems solved by technology

In addition, for seabed soft soil and ultrasoft soil, especially the soil samples in the deep sea area, their formation environment is difficult to simulate. It is even more difficult to prepare this kind of deep sea soft soil with low strength, high water content, high sensitivity and strong structure. Difficult

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