CPC E21D 11/04 (2013.01) | 10 Claims |
1. A reinforcement system at a railway tunnel section passing through a karst cave with a large dip angle, specifically comprising:
an umbrella arch (1-1), a concrete layer (1-2), a flexible buffer layer (1-3) and a protective layer (1-4) which are sequentially built at a top of a portion, of a main tunnel (1) from bottom to top, passing through the karst cave; and
an arch bridge (4) which is built at a bottom of a portion, of the main tunnel (1), passing through the karst cave, wherein a filling layer (4-1) is arranged over the arch bridge (4), two arched door openings (4-2) are reserved at portions, on two sides of the arch bridge (4), of the filling layer (4-1), a bottom plate (4-3) is arranged over the filling layer (4-1), a foundation pad (3-1) is arranged at a bottom of a foundation pit (3) under the arch bridge (4), and a vertical bearing wall (4-4) is built between the arch bridge (4) and the foundation pad (3-1).
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