简要分析了位于巨厚冲积层表土下，竖井破坏的特点及力学机理。
The characteristic and mechanical mechanism of shaft failure under mega-thick alluvial surface layer are briefly analysed.
讨论推知：政和石屯附近所见的震旦-寒武纪变质岩地层不是“巨厚的单斜层”，而是单层厚度十分有限的变杂褶皱地层。
The facts show that the Sinian-Cambrian metamorphic rocks in the area is not just a simple monoclinal stratum, bat the complex folded strata with limited thickness of each layer.
晚更新世以来的三次海平面升降变化造成了潍河下游地区海陆沉积环境交替，形成了巨厚的海陆交互相沉积层。
There were three times of sea-level fluctuation corresponding to the paleoclimate evolution, which had formed the sediments of alternative sea and river facies.
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