PITCHING PILE INDUCED ENGINEERING GEOLOGY CONDITION CHANGE AT THE YELLOW RIVER SUBAQUEOUS DELTA
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摘要: 黄河三角洲埕岛油田开发中,平台就位作业一般采用插桩基础,对井场的海底地貌、浅表地层产生扰动破坏,拔桩后形成桩穴,桩穴重新充填后,地基土工程性质会发生变化。通过对平台拔桩移走后的海底场地进行水深测量、浅地层剖面特征调查以及场地中桩穴内外地层工程地质条件的对比分析,给出了埕岛油田海域因插桩引起的工程地质条件变化特征,并对桩穴内外工程地质条件的变化成因进行了分析。Abstract: Piles are usually adopted as the foundation for platform location at Chengdao oil field of the Yellow River delta. The operation will disturb submarine geomorphology and structures of shallow sediments during pile pitching and pile pulling out. As the result, the engineering properties of foundation soil will be changed after refilling. Based on the results of water-depth measurement and data from shallow profiling, we made comparison of engineering geology conditions before and after pitching piles in this paper. The origin of the changes is also discussed.
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Key words:
- Yellow River delta /
- platform /
- engineering geology conditions /
- pitching pile
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