Steel-FRP composite corrugated plate tunnel secondary lining structure and construction method thereof

Abstract

The invention discloses a steel-FRP composite corrugated plate tunnel secondary lining structure and a construction method thereof and belongs to the technical field of tunnel engineering. The secondary lining structure is formed by prefabricating and splicing steel-FRP composite corrugated plates, the middles of the corrugated plates are inlaid steel cores, and the inlaid steel cores are wrappedwith FRP. The FRP and the inlaid steel cores are composited and formed though a heat curing forming technique, the thickness of the inlaid steel cores is 60-70% of that of the corrugated plates, and the thickness of the FRP is 30-40% of that of the corrugated plates. The thickness of the corrugated plates is calculated and determined according to stress. The direction of corrugated lines is perpendicular to the longitudinal direction of a tunnel. The curve radian of the corrugated plates accords with the designed outline of the tunnel. Bolt holes and grouting holes are reserved in corrugated plate bodies. Flanges for connection are arranged on the two sides of the corrugated plates in the longitudinal direction. Water-stop belts are arranged at the connecting positions of the corrugated plates, so that underground water seepage is prevented. Supports adopt prefabricated component splicing type construction, and the construction period is shortened. The construction environment is improved, the tunnel outline is optimized, the excavation area is reduced under the premise that the building boundary is ensured, and the engineering manufacturing cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering, and particularly relates to a secondary lining structure of a steel-FRP composite corrugated plate tunnel for tunnel engineering and an application method thereof. The invention has the characteristics of high strength, fast construction, good corrosion resistance and high cost performance. Background technique [0002] At present, the secondary lining support of the tunnel is mostly supported by reinforced concrete. Reinforced concrete support has good durability and mature construction technology, but the production efficiency of steel mesh is low. The tunnel support structure of the steel corrugated plate is an assembled support structure, which can quickly seal the excavation surface and reduce the construction period. [0003] In the traditional design process, due to the conservative design of the nature of the concrete material, the thickness of the lining is large, which incr...

AI Technical Summary

Problems solved by technology

However, the corrosion resistance of steel is poor, and it cannot meet the corrosion requirements of tunnel engineering in areas with developed groundwater.

Fiber-reinforced plastic (FRP) has good corrosion resistance, but has the problems of low elastic modulus, large deformation, high price and brittle failure

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