Test system and test method for super-high frost heaving pore water pressure

Abstract

The invention discloses a test system and test method for ultra-high frost heaving pore water pressure. The system comprises a test system, a loading system, a refrigeration system and a data acquisition system. The refrigeration system is controlled to simulate different freezing modes and conditions and adjust the loading system to control loading, no pressure or high pressure freezing to collect data in real time through the data acquisition system. The system not only can measure the change law of a temperature field, stress inside the soil and deformation of a test tube in different freezing modes with time, but also can directly obtain the ultra-high frost heaving pore water pressure, and indirectly obtains the generation and dissipation process of the frost heaving force on the tubeinner wall.

Description

technical field [0001] The invention relates to a test system and test method for ultra-high frost heaving pore water pressure. Background technique [0002] Shafts are as important to underground mine engineering as throats are to human beings. Whether an underground mine can be built or not depends first on the sinking technology. With the development of coal resources in my country going deep into the strata, it is common to encounter deep topsoil layers, which have low strength, high water content, and high ground pressure. It is difficult to solve problems such as water gushing, mud gushing, and quicksand by ordinary drilling methods. A large number of engineering practices have proved that for such complex formations, the freezing method is one of the most commonly used and most reliable drilling methods, and sometimes even the only reliable drilling method. Although the freezing method solves the problems of water gushing, mud gushing, and quicksand during the sinki...

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Problems solved by technology

In addition, the inner side of the inner tube and the space between the two tubes is a closed space, and the external moisture cannot enter the closed unfrozen zone through the frozen zone. Similarly, the internal closed moisture cannot pass through the frozen zone and be discharged. Therefore, Moisture can only accumulate continuous

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