Wet and dry freezing and thawing circulation centrifugation simulation system for cold region water delivery channel, and simulation method thereof

Abstract

The invention discloses a wet and dry freezing and thawing circulation centrifugation simulation system for a cold region water delivery channel, and a simulation method thereof. The system comprisesa model box, a water level lifting device, an air drying device, a heat exchange device, an air internal circulation device and a digital collection temperature control device. A simulation method based on the above simulation system comprises the following steps that: assembling experiment equipment; simulating the single-time wet and dry freezing and thawing process of the channel and the repeated wet and dry freezing and thawing circulation process of the channel. The water level lifting simulation process and the field channel water introduction and stopping process of the simulation system are consistent; an air drying process is consistent with a field drying process; and a refrigeration board is positioned on the top in the model box, a cold quantity is downwards transferred to thechannel bottom of the model through a fan from the refrigeration board, the simulation of channel model freezing and thawing process is realized through the surface of a model soil mass from top to bottom, which is consistent with a practical soil mass freezing and thawing process. Therefore, a practical situation is highly reduced and simulated.

Description

technical field [0001] The invention relates to a physical model measurement test system applied to a geotechnical centrifuge, specifically a simulation test system and a simulation method that can realize wet-dry freeze-thaw cycles on the centrifuge, and is used for simulating the deformation and deterioration of water delivery channels in alpine regions Measurement studies of properties. Background technique [0002] my country's water resources are unevenly distributed in time and space, and most of the northern regions are arid and semi-arid regions. Therefore, the implementation of some long-distance water transfer projects and cross-basin water transfer projects has eased the contradiction between supply and demand of water resources in the north. However, channels located in northern alpine regions, especially open water channels, are vulnerable to adverse geological conditions and extreme climates. For example, water channels in seasonally frozen regions have water f...

AI Technical Summary

Problems solved by technology

[0004] Limited by conditions, equipment technology, etc., the centrifugal simulation test technology for engineering in cold regions started relatively late, mainly concentrated in developed countries such as North America, Northern Europe, and Western Europe. Chinese patent application CN104142356A discloses a centrifugal simulation system for freeze-thaw deformation of a geotechnical centrifuge, which promotes the simulation and testing technology of the frost heaving-thawing process of the water delivery channel under the action of the supergravity field, but its heat exchange measures or equipment cannot be realized. Precise control of the amplitude, it is difficult to restore the real temperature amplitude of the prototype

When the test needs to complete the simulation of the wet-dry freeze-thaw cycle process of the water delivery channel without stopping the centrifuge, the invention cannot meet the test requirements

[0005] To simulate the whole process of channel wet-dry freeze-thaw cycle on the centrifuge, the key technology is to realize the

Images