Tunnel heat preservation center ditch structure

The utility model discloses a tunnel heat preservation center ditch structure which comprises an inverted arch filler, a center drainage pipe is arranged in the middle of the inverted arch filler, andthe center drainage pipe is positioned through a concrete base and a leveling layer. A heat preservation layer is arranged on the outer side of the center drainage pipe and the outer side of the concrete base and comprises a polyurethane heat preservation plate and a waterproof plate wrapping the polyurethane heat preservation plate. The tunnel central drainage pipe is novel in design concept, reasonable in heat preservation scheme, small in investment, convenient to construct, capable of well solving the freezing problem of the tunnel central drainage pipe in the cold region, capable of guaranteeing smooth drainage in the tunnel and wide in application prospect. 本实用新型公开了一种隧道保温中心水沟结构，包括仰拱填充，在所述仰拱填充中部设置中心排水管，所述中心排水管通过混凝土基座及找平层对其进行定位；所述中心排水管及混凝土基座外侧设置保温层，所述保温层包括聚氨酯保温板以及外部包覆的防水板。本实用新型设计理念新颖，保温方案合理，投资较小，便于施工，能很好的解决寒区