Tunnel portal structure of crossed road

The utility model belongs to the field of urban road traffic, and particularly relates to a tunnel portal structure of an intersected road, which comprises a tunnel body, the tunnel body is arranged below the intersected road in a penetrating manner, the tunnel body is provided with a tunnel portal, the top of the tunnel portal is of an arc-shaped structure, and a green belt is arranged on the intersected road. And the green belt and the tunnel portal are mutually spaced to form a turning lane. The top of the tunnel portal of the tunnel is of the arc-shaped structure, and compared with a traditional tunnel portal with the top of a linear structure, the tunnel portal can be structurally matched with a U-turn lane on an intersecting road, so that the length of a buried section of the tunnel can be reduced under the condition that the position of the U-turn lane on the top of the tunnel is not changed, and the construction efficiency is improved. The investment is saved. 本实用新型用于城市道路交通领域，特别是涉及一种相交道路的隧道洞口结构，包括隧道本体