Two-way reinforced freezing device and working method

Abstract

The invention discloses a two-way reinforced freezing device and a working method, and belongs to the technical field of underground engineering artificial freezing. The two-way reinforced freezing device includes a spiral coil tube and straight freezing tubes. The straight freezing tubes and the spiral coil tube are arranged in a perpendicular mode. The overlap of the freezing directions of the straight freezing tubes and the spiral coil tube forms a two-way freezing effect. During freezing construction, the two-way reinforced freezing device is directly inserted into a weak position of a weak stratum or a freezing wall, and a low-temperature refrigerant input through an inlet flows along the spiral coil tube and flows out along a coil tube outlet after through the straight freezing tubesand the spiral coil tube to complete a freezing cycle process. The straight freezing tubes of the two-way reinforced freezing device are inserted into the weak position of the weak stratum or the freezing wall, the device is directly fixed on the surface of the stratum without additional support, the two-way freezing overlap function of the spiral coil tube and the straight freezing tubes forms athree-dimensional freezing mode, the freezing effect can be strengthened, the freezing efficiency is improved, and the construction cost is 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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