Anisotropism resonant column system and method in stable and accurate temperature control

Abstract

The invention belongs to the technical field for testing strength characteristic of a solid material by using mechanical stress, and discloses an anisotropism resonant column system and method in stable and accurate temperature control. The system comprises a temperature control pressure chamber part, a torsion excitation part, an axial loading part, a temperature and signal collection and controlpart, and an auxiliary equipment part. The system disclosed by the invention can prevent sample eccentric distance in torsion excitation, and perform back-pressure saturation on original soil or remolded soil, thereby enabling the same to achieve complete saturation; each sensor numerical value is digitally displayed by utilizing a software program, and an axial driver is accurately and effectively controller, and each of a torsion driver and a temperature automatic regulator can achieve a test target value; the device can work as normal at the environment temperature of -20 to 90 DEG C so asto accurately measure and control liquid pressure and liquid volume change and accurately measure and control gas pressure change.

Description

technical field [0001] The invention belongs to the field of environmental geotechnical and energy geotechnical engineering, and in particular relates to a stable and precise temperature-controlled anisotropic resonance column system and method. It is mainly used in the field of environmental geotechnical and energy geotechnical engineering to measure the small strain dynamic characteristics of soil in various stress states under the effect of temperature. Background technique [0002] When bridges, houses and other buildings on the ground are subjected to earthquakes, traffic load vibrations or mechanical vibrations, the soil and these building systems are subjected to vibrations of different amplitudes and frequencies. In the frequency range, resonance will occur, which will cause great harm to the building. It is of great significance to study the dynamic properties of soil in various strain ranges for earthquake prevention, shock absorption and disaster resistance. [...

AI Technical Summary

Problems solved by technology

[0012] (1) The existing anisotropic resonance column device cannot achieve stable and precise temperature control over a wide range (-20°C to 90°C);

[0013] (2) Existing anisotropic resonant column devices cannot saturate undisturbed soil or remolded soil

[0014] (3) Some anisotropic resonance column devices cannot perform torsional vibration on isotropic (equal consolidation) or anisotropic (non-uniform consolidation) consolidated soil samples

In view of these practical problems in existing major projects, there is a lack of an anisotropic resonant column device suitable for engineering practice that can be stabilized and precisely controlled in a wide range (-20°C to 90°C); The remolded soil is saturated, and the isotropic (equal consolidation) or anisotropic (non-uniform consolidation) consolidated soil sample is subjected to torsional vibration, and the temperature of the test environment is precisely controlled to study the effects of various environmental temperatures. Device for Dynamic Characteristics of Soil under Anisotropic Consolidation Conditions at Various Strain Levels (0.0001%~0.1%)

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