A waterproof well wall shrinkable device and its construction technology

Abstract

The invention discloses a waterproof well wall compressible device and a construction process thereof. The contractible device comprises an annular U-shaped steel structure, a circular ring supporting plate and compressible fillers. The annular U-shaped steel structure is constituted by head-tail connection of a plurality of U-shaped steel structure arc sections. The circular ring supporting plate is further formed by head-tail connection of a plurality of arc-shaped supporting plate bodies and fixedly connected to the inner side of the opening end of the annular U-shaped steel structure. A cavity formed between the annular U-shaped steel structure and the circular ring supporting plate is filled with the compressible fillers. The structure is simple; construction is convenient; airtightness is good; the compression ratio is high, working performance is reliable, the engineering cost and engineering construction difficulty can be effectively reduced; and quite wide practicability in the technical field is achieved.

Description

technical field [0001] The invention relates to a waterproof shaft wall retractable device and a construction process thereof, which are suitable for the inner shaft wall of a double-layer concrete composite shaft wall of a vertical shaft constructed by freezing method. Background technique [0002] As the mining depth continues to deepen, more and more mine shafts need to use the freezing method to pass through the deep topsoil layer or porous soft rock layer. The vertical force is applied to the wellbore, resulting in wellbore damage engineering accidents. [0003] In order to solve the problem of wellbore damage caused by surface subsidence, predecessors developed a variety of retractable devices. When the vertical stress of the well wall is greater than the vertical load allowed by the design of the well wall, the retractable device will produce vertical compression deformation and release Excessive vertical force on the shaft wall keeps the vertical stress of the shaft...

AI Technical Summary

Problems solved by technology

The design compression rate of the existing collapsible device is very high. Due to the complex force of the collapsible device, it is easily constrained by the outer well wall, so that the actual compressibility of the collapsible device is reduced, and the design compressibility cannot be reached.

Due to the harsh conditions of the wellbore, gaps are easily formed between the existing retractable device and the outer well wall, causing serious leakage of water in the formation into the well, resulting in damage to the well wall and unsafe production

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