Humidifying deformation experimental device for large-thickness collapsible loess

Abstract

The invention discloses a large-thickness collapsible loess humidifying deformation experiment device which comprises a closed shell, a bearing table, a supporting humidifying assembly, a vibration assembly and a loading assembly; the bottom end of the closed shell is fixedly embedded in the bearing table, a central connecting block is fixedly arranged in the middle of the closed shell, four vibration assemblies are evenly installed on the upper circumference of the central connecting block, a loading assembly is fixedly connected to the upper portion of the inner wall of the closed shell, an annular pipe is fixedly arranged on the circumferential side face of a bearing table, and a plurality of supporting and humidifying assemblies are evenly and fixedly communicated with the circumference of the lower end of the bearing table; an annular sealing sleeve is arranged at the joint of the closed shell and the bearing table; a plurality of sensors are arranged in the bearing platform and comprise a humidity sensor, a strain sensor, an internal force monitoring sensor and a static force level gauge, and the plurality of sensors and the plurality of vibration assemblies which are arranged in the bearing platform are connected with a controller through wire harnesses.

Description

technical field [0001] The invention belongs to the technical field of collapsible loess experiment devices, in particular to a large-thickness collapsible loess humidification deformation experiment device. Background technique [0002] Collapsible loess refers to the soil that undergoes significant additional deformation due to the structural damage of the soil after immersion under the action of the self-weight stress of the overlying soil layer, or under the combined action of self-weight stress and additional stress, while large-thickness collapsible loess is The thick collapsible loess formed under the influence of accumulation environment, geographical location, geology and climate conditions in various regions will cause significant damage to the buildings on its surface due to significant subsidence when it meets water. Therefore, it is necessary to conduct a humidification deformation test on the collapsible loess in the target area before construction. However, ac...

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Problems solved by technology

[0003]1. Water injection and humidification is carried out from the outside of the buried experimental device, and the humidification of the target area is uneven and the humidification rate is slow, which makes the experiment cycle longer and the test results not representative;

[0004]2. Many collapsible loess humidification experimental devices are tested in a static state, without taking into account the natural environment factors, which will affect the experimental results. Of course , there are also a small number of vertical vibration components used to simulate experiments under seismic conditions, but they only have up and down vibration components, which can only simulate longitudinal waves of earthquakes, but cannot simulate real seismic conditions. There will be a certain deviation in the evaluation of the region;

[0005]3. The center of gravity of the overall design of the experimental device is offset, which makes the device tilted when the experiment starts to be buried, which will affect the subsequent experimental data. At the same time, increase the load in the middle of the device , since the support points of the device are all on the outside, the device itself will be deformed, resulting in inaccurate experimental results

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