Shield tunnel slab staggering problem handling structure and construction method

Abstract

The invention discloses a shield tunnel slab staggering problem handling structure and a construction method. The shield tunnel slab staggering problem handling structure comprises a staggered slab lifting pipe piece, a staggered slab sinking pipe piece, embedded steel bars, a reinforcing mesh, repairing mortar and a rubber waterstop, wherein a plurality of blind holes are formed in the staggered slab lifting pipe piece, and the embedded steel bars are anchored onto the staggered slab lifting pipe piece through the blind holes in the staggered slab lifting pipe piece and steel bar embedding adhesives; the reinforcing mesh and the embedded steel bars are connected through spot welding; a gap in the slab staggering position repaired through the steel bars and the reinforcing mesh is filled with the repairing mortar; and the rubber waterstop is anchored to the side, closely attached to the repairing mortar, of the staggered slab sinking pipe piece. The construction method comprises the steps that firstly, drilling burrs on the surfaces of the staggered slab pipe pieces are removed; secondly, the steel bars are embedded in the holes after the holes are drilled in the surface of the staggered slab lifting pipe piece, and the reinforcing mesh is laid at the same time; and finally, the staggered slab pipe pieces are repaired by means of the repairing mortar. The shield tunnel slab staggering problem handling structure is simple, construction is convenient, the mechanical property is good, the cost is low, and the shield tunnel slab staggering problem can be effectively handled.

Description

Technical field: [0001] The invention belongs to the field of repairing diseases of shield tunnels, and in particular relates to a structure and a construction method for treating diseases of shield tunnel staggered platforms. Background technique: [0002] Staggered platform is one of the common defects in the construction of subway shield tunnels. Due to improper grouting control and irregular assembly operations of shield segments, the size between adjacent segments of the same ring or between segments of different rings will appear. Deviation, that is, the occurrence of circumferential and longitudinal staggering. If the segment misalignment disease is not repaired in time, it will cause quality problems such as cracking, damage, and chipping at the edge of the segment. In severe cases, it will cause slurry leakage and water seepage in the tunnel, and the shield tail brush will be squeezed and damaged, resulting in slurry leakage at the shield tail, etc. , so invent a s...

AI Technical Summary

Problems solved by technology

The above-mentioned methods all have their disadvantages: for slight misalignment, the repeated vibration of the epoxy mortar used for filling will cause fatigue of the repaired part during vehicle operation, which will easily lead to falling off; for more serious misalignment, only bolts are implanted and Combined with cement-mixed mortar, the bonding force is not strong enough, the overall bearing capacity of the repaired structure is low, and the treatment effect is not significant

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