| 摘要 |
A crossroad of a double-layered underground road with a simple structure according to the present invention improves constructability and reduces construction costs for a crossroad because of the simple structure in which four connection roads and eight separating and joining parts are formed, compared to a conventional crossroad having six connection roads and twelve separating and joining parts. The present invention reduces construction costs as well as a construction period for the crossroad as the number of connection roads and separating and joining parts in the crossroad decreases and therefore the number of roads in the crossroad decreases. Also, the present invention significantly reduces construction costs for roads (underground roads) by making main roads linked with the crossroad have only three lanes. [Reference numerals] (AA,BB,CC,DD) Three-lane tunnel |
