中文摘要：

黄河三角洲是胜利油田采油的主要区块,海床上分布有大量的输油管线。2005年8月6日至9日台风“麦莎”经过此地形成风暴潮。2005年8月5日和8月12日在风暴潮前后分别对胜利油田106钻井平台附近一条裸置海底管线铺设地区海床土工程性质进行了原位测量,并在管线拆除后于2006年9月5日对该地区进行了复测,发现：①由于管线的存在导致管线两侧潮滩的水动力条件发生改变,继而使得两侧海床土的性质发生了变化;②管线存在使得其影响区海床土强度增高,管线拆除后海床土强度降低均匀性变差;③风暴潮作用使海床土强度提高,均匀性增强。研究结果为波浪与管线共同作用下海床土变化研究提供典型实例。

英文摘要：

The Yellow River Delta is a main area to extract oil of the Shengli Oilfield. There are masswe oll plpehnes on me seaoea, and the existence of the pipelines affected the strength of sea-bed soils. The typhoon ＂Matsa＂ passed through this area from August 6% to 9 in 2005, and a stormtide was formed. Between August 5, 2005 and August 12, 2005, before and after the ＂Matsa＂, there were in-situ measurements in the pipeline affected regions, which were near the Shengli Oilfield＇s 106 Drilling Platform in the Yellow River Estuary, and the pipeline is an abandoned nakedly pipeline which was used to transmit oil. And after the pipeline was removed, a repetitive measurement was carried out on September 5, 2006 in this area. Based on the test results, a series of interesting phenomena were found.. （1）Because of the pipeline＇s existence, the two sides of the pipelines hydrodynamic forces changed, and made seabed soils＇ strength changed; （2）the pipeline raised up the sea-bed soils strength and when the pipelines are reduced, the strength and the uniformity are reduced; （3）after the storm tide, the strength of the sea-bed soils and uniformity is increased. The findings serve as simulation tests about the soils＇ changes under the pipeline-wave conditions.