文章对杭州湾大桥的勘察工作进行了全面的回顾，并对杭州湾地区地质结构作概略的介绍。
This article has comprehensive looked back the investigation of the Hangzhou gulf Bridge and sketchily introduced the geology texture of the Hangzhou gulf region.
该地区不可预知的地质环境和火山岩结构迫使工程师放弃使用钻孔机，而是通过爆破在津轻海峡挖掘出一条通道。
Theregion's unpredictable geology and its volcanic rock prevented engineers from using boring machines, forcing them to blast and dig their way under the Tsugaru Strait.
对地质结构复杂地区，该法可以避免某些不适当的近似假设条件。
In areas where geologic structures are complicated, this method may avoid some inappropriate approximate hypotheses.
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