Vacuum saturation device for soil engineering centrifugal model test

Abstract

The invention relates to a vacuum saturation device for a soil engineering centrifugal model test, and the device provided by the invention comprises a vacuum pump used for supplying power to the whole device, wherein one end of the vacuum pump is connected to a power control cabinet while the other end of the vacuum pump is connected to a water vapor separating jar which is used as the energy storage of the whole device; the water vapor separating jar is connected to the power control cabinet through an electric contact vacuum pressure gage; the vacuum pump is turned off and turned on in real time according to the higher and lower limit values of pressure preset by the electric contact vacuum pressure gage; a three-way valve is arranged on the top of the water vapor separating jar; a first vapor outlet of the three-way valve is connected to a saturation box for supplying a saturation space through a first pipeline; the saturation box is separated from the whole device; a second vapor outlet of the three-way valve is connected to an oil supply jar of a saturation system through a second pipeline; and the bottom of the oil supply jar is connected to a model box in the saturation box through a third pipeline. The vacuum saturation device is not limited by the volume of a saturation object, the saturation speed is controllable, and the saturation quality is ensured.

Description

technical field [0001] The invention relates to a geotechnical centrifugal model test vacuum saturation device capable of saturating a model soil sample at a certain rate under a specified vacuum degree. Background technique [0002] At present, there are not many designs of geotechnical centrifugal model test devices, only imaging devices and model test piles for model tests, and no vacuum saturation device suitable for geotechnical centrifugal model tests has been found. [0003] The geotechnical centrifuge model test has special requirements for the saturation of the model soil sample. First, saturated objects have a larger volume. Limited by the maximum centrifugal acceleration of the centrifuge and the strength of existing sensors, the scale of the model should not be too large, resulting in the size of the model box containing the model soil samples not being too small, generally up to 1m 3 level. Second, the saturation time of model soil samples is longer. Since t...

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Problems solved by technology

[0004] The existing saturation device has the disadvantages that the volume of the saturated object is small, the saturation time is short, the specific negative pressure difference cannot be set, and the saturation speed cannot be controlled, and it cannot fully meet the special requirements for the preparation of saturated soil samples for geotechnical centrifugal model tests

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