Hydraulic tunnel structure spanning large-scale active fault zone

Abstract

The invention relates to a hydraulic tunnel structure spanning a large-scale active fault zone and belongs to the technical field of water conservancy and hydropower application. According to the technical scheme, the hydraulic tunnel structure comprises an active fault spanning section, a buried type steel penstock section with two connected ends and an overhaul tunnel communicated with the active fault spanning section in the longitudinal direction of a tunnel, a combined type lining structure is adopted in the active fault spanning section, the active fault spanning section is composed of an outer layer structure and an inner layer structure in the radial direction of the tunnel, the outer layer structure comprises a one-stage annular support and a one-stage annular lining on the outer side in the radial direction, the one-stage annular support and the one-stage annular lining are of reinforced concrete lining structures, and the inner layer structure comprises a combined lining structure with steel pipes and corrugate telescopic joints, wherein the steel pipes and the corrugate telescopic joints are connected in series alternatively. The hydraulic tunnel structure spanning the large-scale active fault zone is safe and convenient to construct, has the good seismic capacity and the capacity for resisting large-scale fault creep diastrophism damage and is high in safety.

Description

technical field [0001] The invention relates to a hydraulic tunnel structure spanning a large-scale active fault zone, and belongs to the technical field of water conservancy and hydropower applications. Background technique [0002] In recent years, due to the movement of some large-scale active faults, large earthquakes have occurred in nearby areas, resulting in damage and loss of engineering buildings. In water conservancy and hydropower projects, hydraulic tunnels used to meet the requirements of power generation and irrigation and water delivery, if faults are encountered, avoidance and detour measures should be taken first; After special treatment, it will be difficult to meet the needs of long-term stable operation of the project. The threat of active faults to the safety of engineering buildings mainly comes from fault dislocation, which includes sudden dislocation (stick-slip that generates earthquakes) and slow dislocation (creep that does not generate earthquake...

AI Technical Summary

Problems solved by technology

However, sometimes it is inevitable to encounter some complicated geological conditions, especially in areas with high seismic intensity, some large-scale active fault zones may be encountered, and the above-mentioned lining structure cannot achieve the required seismic capacity and resistance to large-scale fault creep. The ability to manually destroy, thus failing to meet security requirements

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