A two-way enhanced freezing device and working method

Abstract

The invention discloses a two-way enhanced freezing device and a working method, which are suitable for the technical field of artificial freezing of underground engineering. It includes a spiral coil and a straight freezing tube. The straight freezing tube and the spiral coil are arranged vertically. The freezing directions of the two are superimposed to form a two-way freezing effect. During the freezing construction, directly insert the two-way enhanced freezing device into the weak ground or the frozen wall The low-temperature refrigerant input through the inlet flows along the spiral coil, passes through the direct freezing tube and the spiral coil respectively, and then flows out along the coil outlet to complete the freezing cycle process. The straight freezing pipe of the two-way enhanced freezing device is inserted into the weak formation or the weak position of the freezing wall, and the device is directly fixed on the surface of the formation without additional support. The two-way freezing superposition of the spiral coil and the straight freezing pipe forms a three-dimensional freezing mode. The freezing effect can be strengthened, the freezing efficiency can be improved, and the construction cost can be saved.

Description

technical field [0001] The invention relates to a freezing device and a working method, in particular to a two-way enhanced freezing device and a working method which are suitable for use in underground engineering construction for soft strata or weak positions of frozen walls. Background technique [0002] In underground engineering construction, when encountering complex geological conditions such as water-rich soft soil strata, artificial freezing technology is often used to reinforce the soil layer to improve the performance of the stratum, so as to complete excavation and structure construction in the water-rich stratum. However, when freezing, some areas often have weak frozen walls, or when there are weak strata around the excavation, it becomes a safety hazard in the project, and it is necessary to strengthen the freezing of the area. The traditional enhanced freezing method is to arrange the freezing tube on the steel plate to form a "cold plate", attach the cold pl...

AI Technical Summary

Problems solved by technology

Therefore, the cold plate can only be frozen in a single direction vertical to the plate surface, the freezing efficiency is low and the effect is poor, and a long freezing time is required

Moreover, when the cold plate is arranged vertically, it is necessary to adopt a support structure to fix the frozen cold plate, which will affect the construction space inside the frozen wall and hinder other construction processes such as excavation. Large amount, very inconvenient to operate

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