Tunnel invert repair secondary lining reinforcing structure and construction method

Abstract

The invention discloses a tunnel invert repair secondary lining reinforcing structure and a construction method and belongs to the technical field of tunnel construction. The construction method includes that a steel pipe anchor bar pile composed of a foot-locking anchor pipe and a bar bundle is inserted into a reinforcing hole at a corner of a secondary lining side wall, cement mortar is poured for reinforcing, and the steel pipe anchor bar pile penetrates secondary lining reinforced concrete and extends into surrounding rock, so that balance of an invert and integral structural of a tunnel after the invert is removed can be maintained effectively, inward sliding of the secondary lining structure and cracking are avoided, safety of construction personnel and equipment is ensured, construction progress is improved, project quality can be ensured greatly, and project life can be prolonged greatly.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a tunnel inverted arch repair secondary lining reinforcement structure and a construction method. Background technique [0002] The inverted arch of the tunnel is one of the main components of the tunnel. The upper formation pressure can effectively transmit the load on the road surface to the underground through the tunnel side wall structure or effectively resist the reaction force from the lower formation of the tunnel. The inverted arch and the secondary lining constitute the tunnel as a whole, increasing the structural stability. [0003] Defects of inverted arches in highway tunnels include inverted arch slag, insufficient concrete thickness, uncompacted concrete, floor heaves, cracks in the inverted arch backfill road surface area, mud turning, etc. The inverted arch is reinforced by slurry method. [0004] The above-mentioned inverted arch defec...

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Problems solved by technology

[0004] The above-mentioned inverted arch defects can be sealed and sealed to the existing cracks or groundwater after grouting treatment, so that the lower defects such as virtual slag can form a whole. , the inverted arch and the backfilled concrete surface of the inverted arch are not clean, and cannot form an overall structure in an absolute sense. The durability of the repaired structure is difficult to guarantee. Many tunnels will still have the same or new diseases after several years of operation after treatment.

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