A freezing and anchoring combined freezing and cold plate and its method

Abstract

The invention discloses a freezing and anchoring combined freezing and cold plate and a method, which are suitable for the field of underground engineering. A spiral coil is provided in the two steel plates, and a card slot is provided on the two steel plates, and a telescopic freezing and fixing device is provided in the card slot. The spiral coil inlet and the spiral coil outlet are respectively connected to the two ends connected. Through the method of circulating low-temperature refrigerant in the spiral coil, a vertical frozen wall is formed on the surface of the slope to improve the strength of the soil. At the same time, the bottom cone of the cavity is pushed into the deep part of the formation with a liquid supply steel pipe, and the bottom cone connected to the cavity The hose stretches with it, creating a horizontal frozen hose. Thus, an enlarged freezing zone is formed at the bottom cone of the cavity to provide anchorage for the freezing of the cold plate to form a frozen wall, and improve the overall stability of the frozen wall formed by the cold plate. The combined freezing and anchoring combination freezing cold plate can give full play to the combined effect of the freezing wall and the bolt anchoring, and significantly improve the overall stability of the freezing wall.

Description

technical field [0001] The invention relates to a freezing and anchoring combined freezing cold plate and a method thereof, which are especially suitable for use in slope reinforcement engineering in weak strata, and belong to the field of underground engineering construction. Background technique [0002] In the construction of underground engineering, when encountering weak strata rich in groundwater, unstable slopes often occur due to the influence of groundwater movement, which seriously threatens the safety of personnel in underground engineering construction and becomes a major safety hazard. In this case, the artificial freezing method is often used to freeze the surface of the slope by using artificial freezing technology, so as to achieve the purpose of strengthening the soil and preventing the slope from sliding. However, when the slope is steep or the groundwater movement is active, the frozen wall may slide as a whole, which is extremely unsafe. At this time, it...

AI Technical Summary

Problems solved by technology

However, when the slope is steep or the groundwater movement is active, the overall sliding of the frozen wall may occur, which is extremely unsafe

At this time, it is necessary to expand the freezing range, increase the thickness of the frozen wall, or install a lateral support structure on the surface of the frozen wall, which will not only greatly increase the workload and construction cost, but also the lateral support structure will occupy the internal space of the excavation and affect the subsequent excavation. excavation construction

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