Preliminary Research and Suggestions of Qiongzhou Strait Cross-sea Channel Project.

The construction of the Strait Passage is an important part of improving the national comprehensive three-dimensional transportation network, one of the important strategic tasks of promoting the construction of a transportation power, and of special significance for China to construct a new production pattern. This paper focuses on the preliminary study of the Qiongzhou Strait cross-sea channel project, combs the research achievements of the Qiongzhou Strait channel over the years, and analyzes the necessity and feasibility of the Qiongzhou Strait channel construction. The study of the construction scheme of the Qiongzhou Strait channel, comparison and selection of the channel alignment, bridge and tunnel schemes, and highway and railway schemes respectively recommend to "plan once, construct by stages, and build the railway first" and construct midcourt railway of double-line in advance (reserve highway channels), and adopt the four hole parallel scheme of "double hole highway tunnel+single hole double line railway tunnel+service tunnel". It also puts forward suggestions for the construction of the Qiongzhou Strait from the aspects of construction opportunity, financing mode, construction concept, operation and maintenance plan, thematic research, etc. [ABSTRACT FROM AUTHOR]