Vertical shaft structure and construction method thereof

Abstract

The invention discloses a vertical shaft structure and a construction method thereof. The vertical shaft structure comprises a supporting and blocking structure, wherein the supporting and blocking structure comprises a shield tunnel, a lining supporting structure and a long and short combined underground continuous wall. The long and short combined underground continuous wall is designed, when the bottom of the short underground continuous wall is excavated, namely, when the short underground continuous wall is suspended, the requirements of foundation bearing capacity and stability are met by means of a rock-socketed section of the long underground continuous wall; and when the bottom of the long underground continuous wall is excavated, namely, when the long underground continuous wallis suspended, the requirements of foundation bearing capacity and stability are met by means of a combined structure of the short underground continuous wall and the lining supporting structure, and astaged stress system is realized. The vertical shaft structure and the construction method thereof can be widely applied to the technical field of deep foundation pit construction.

Description

technical field [0001] The invention relates to the technical field of deep foundation pit construction, in particular to a shaft structure and a construction method thereof. Background technique [0002] At present, under the geological conditions of the upper soil and the lower rock, the suspension foot support structure of deep foundation pit is widely used. If the end of the support structure is embedded in strong weathered or moderately weathered rock, especially when the rock strength is high, the construction It will be very difficult to form grooves, resulting in reduced construction efficiency and increased costs. Considering economical and construction factors, the depth of embedded rock is generally limited. If the bottom of the foundation pit is below the bedrock, when the foundation pit is excavated to the base, the retaining structure seems to be hanging in the air, which is commonly known as "hanging feet". The structure of the existing hanging foot type supp...

AI Technical Summary

Problems solved by technology

The limitations and disadvantages of the existing hanging-foot support structure are that the ends of cast-in-place piles or underground connecting walls are at the same elevation, and there are problems such as local instability and insufficient bearing capacity at the end of the support-retaining structure. If it fails, the structural system will fail, and the safety and success of the project depends entirely on the reliability of the anchor cable.

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