A method and device for designing a freezing method model under the action of seepage in combined formations

Abstract

A method and apparatus for designing a freezing method model under that action of combine formation seepage includes such steps as designing each similar design constant of model accord to similarityprinciple, including geometrical similarity constant, seepage similarity constant and heat transfer similarity constant, and designing freezing method and device for freezing method under action of combined formation seepage. Designing model soil system; calculating The theoretical seepage flow of the model soil system, designing the seepage circulation system, and obtaining the control parametersof the seepage circulation system. Designing The freezing circulation system is designed, and calculating and designing the control parameters of the freezing circulation system. Designing the type of sensor and its layout in the model soil system. In accordance with that prior art, The invention simulates and monitors the freezing temperature field, the deformation field and the pressure distribution of the surrounding soft clay through the distribution of the sensors by establishing a model and combining different seepage conditions of the stratum design, which provides a reference for engineering control of uneven deformation, prevention of excessive local frost heaving force, enhancement of safety and optimization of construction scheme, etc., and has great significance.

Description

technical field [0001] The invention relates to the technical field of geotechnical engineering, in particular to a design method and device of a freezing method model under the seepage action of combined formations. Background technique [0002] The artificial ground freezing method ("freezing method" for short) is an effective construction method for strengthening soft clay strata. all play a vital role. In the application of general soft clay stratum freezing method, the seepage velocity of groundwater is very small, and the influence of seepage on the freezing method is basically not considered. However, as the underground space in coastal cities and coastal areas continues to be further developed, when the project is When cross-river (cross-sea) tunnels, or karst caves exist around engineering excavation, engineering construction is near the surface / groundwater drainage channel, or engineering excavation is adjacent to the water-resistant roof / floor of the aquifer, the...

AI Technical Summary

Problems solved by technology

[0004] However, the above technologies all have the following disadvantages: 1. They can only be simulated and studied for a single sand layer, and are not suitable for the study of the application of the soft clay freezing method in coastal soft clay areas. The freeze-thaw characteristics and viscosity of sandy strata Soils are very different, and seepage conditions are also very different

2. All of them only proposed a theoretical experimental model and operation method, lacking specific application methods on how to completely carry out model design and build models according to the construction status of the site when targeting specific engineering objects

Images