Anchor cable opposite-puling type supporting and protecting structure system and construction method thereof

Abstract

The invention relates to a tunnel supporting and protecting system, in particular to an anchor cable opposite-puling type supporting and protecting structure system and a construction method thereof.The supporting and protecting structure system comprises a vertical guide hole, a main tunnel, a first opposite-pulling anchor cable and a second opposite-pulling anchor cable; the vertical guide holeis arranged in a rock body above the main tunnel and is arranged parallel to the main tunnel; the first opposite-pulling anchor cable is arranged from top to bottom; the upper end of the first opposite-pulling anchor cable is fixed to the ground surface; the lower end of the first opposite-pulling anchor cable is fixed to the vertical guide hole; the second opposite-pulling anchor cable is arranged from the top to the bottom; the upper end of the second opposite-pulling anchor cable is fixed to the vertical guide hole; and the lower end of the second opposite-pulling anchor cable is fixed tothe main tunnel. The construction method is used for constructing the supporting and protecting structure system. The supporting and protecting structure system and the construction method provided bythe invention can effectively control the overall settlement of a tunnel structure, ensure the operating safety, and provide a new idea and a new method for a tunnel penetrating through a giant cavern hall.

Description

technical field [0001] The invention relates to a tunnel support system, in particular to an anchor cable pair-pull support structure system and a construction method for a tunnel passing through a giant karst cave. Background technique [0002] Since the beginning of the 21st century, my country's railway construction has developed rapidly, and more and more high-standard double-track railways with a speed of more than 200km per hour have been built. In the western region, the development of line lines is restricted by various factors such as large curve radii and complex topographic and geological conditions. The tunnels are getting bigger and bigger. Especially in the southwestern mountainous area, karst is developed, and there are more and more long karst tunnels. It is inevitable to encounter various karst forms during tunnel construction. [0003] Under normal circumstances, when railways pass through small and medium karst caves, schemes such as backfilling, spanning,...

AI Technical Summary

Problems solved by technology

[0003] Under normal circumstances, when railways pass through small and medium karst caves, schemes such as backfilling, spanning, and roof support are often used. None of the schemes can effectively ensure the safety of construction and operation

When the depth of the karst cave is too large and the length along the line is too long, the amount of backfill is too large and the settlement of the foundation cannot be effectively controlled, and the safety and stability of the tunnel structure cannot be guaranteed during construction and operation when the backfilling scheme is used; Pier long-span structures are the most common, and the construction is difficult, and the bridge span structures that bear the train load and the lining structure need to be set up separately, and the project cost is high

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