在收集渤海海峡的气象水文、地形地貌、地层岩性、地质构造及地震活动等资料，以及现场调研的基础上，分析了渤海海峡跨海工程的建设条件。由于海峡雾大、风大，年平均大风日达67.8 d，故采用桥梁方案不利于全天候通行。由于海峡岛屿众多，且南北向成一字形分布，跨海工程线位可选择连岛方案以减小建设难度和成本。海峡第四系地层稳定性差，且第三系地层主要为玄武岩，大孔隙结构，分布极不均匀，最厚达70 m，这两套地层对隧道埋深的选择有较大影响。对于蓬莱—旅顺线位，场址附近没有活动断层，地层相对稳定。这些资料可为渤海海峡跨海通道方案的初步研究提供参考。

Geological conditions of Bohai Strait is complicated. Meteorological conditions, topography, stratum lithology, geological structure, earthquake activity are directly related to the Bohai Strait cross-sea construction successful or not. Adopting the research method, a lot of engineering geological and hydrogeological data of the bohaistraitwere collected, and detailed analysis has been carried on, the regional stability evaluated. The bridge is not disadvantage of the all-weather horoughfare, for thick fog, high wind and the average gale in year days up to 67.8 days in Bohai Strait;because there are some islands and islets what keep a line along the longitude, the joining islands are choosed for the Bohai Strait cross-sea engineering construction to reduce the difficulty and cost of construction. There are the poor stability Quaternary stratigraphic and third strata mainly basalt, large pore structure,very uneven distributed and up to 70 m cover, and these two sets of strata have great influence on theoption of buried depth of the tunnel. To line of Penglai—Lvshun, there are not active faults in construction site, and the formation of relatively stable. These work can provide reference for the Bohai Strait cross-sea construction.