A STABILITY EVALUATION SYSTEM FOR OFFSHORE ARTIFICIAL ISLANDS
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摘要: 选取地壳稳定性(构造特征、地震、沉降)、海床稳定性(地形、海床液化、海底冲刷)、地基稳定性(持力层性质、工程软弱层、埋藏古河道)和海洋环境稳定性(风暴潮、海流、波高、水深)四大类13个因素作为评价指标,利用层次分析法(AHP)确定各指标权重,采用模糊综合法对人工岛工程地质环境稳定性进行定量评价,建立了一套用于人工岛安全稳定性评价的方法体系。使用该方法,对莱州湾青东区块人工岛工程地质环境稳定性因素进行了系统分析和评价,结果表明,该评价体系对人工岛建设具有一定指导意义。Abstract: A stability evaluation system for artificial islands was established using the fuzzy comprehensive evaluation method, upon the basis of the surrounding engineering geological environment. Thirteen factors were selected as the evaluation index, which were grouped into four categories, i.e.:factors of regional crustal stability (including tectonic features, seismic intensity, and ground subsidence), factors of seabed stability (including topography, liquefaction, and scouring), factors of foundation stability (including bearing strata, engineering soft strata, and buried ancient channels), and factors of marine environment stability (including storm surges, tidal current, wave height, and water depth). AHP method was adopted to weigh those factors. The research results would be useful to the construction of the artificial islands and its safety insurance.
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