珠江口海域区位优势明显，但工程地质条件复杂，灾害地质类型多样。随着该海区海洋工程活动的增加，工程地质环境的研究与评价对未来开发建设的意义越来越重要。文中收集整理了近年来的调查资料，构建了以灾害地质类型和海底土体工程性质为基础的工程地质环境质量评价指标体系，并利用层次分析法确定了各评价指标权重值。将研究区划分为577个评价单元，采用模糊综合评价方法对工程地质环境质量进行了定量评价，将研究区划分为工程地质环境稳定区、较稳定区、基本稳定区、较不稳定区、不稳定区。评价结果表明，稳定区约占研究区的70%；较不稳定和不稳定区约占研究区的26%。该区域除存在大地震、活动断裂等自然灾害地质因素外，受人类活动影响也在不断加剧。%The location advantage of the Pearl River Estuary is obvious, but the geo-engineering and geo-hazardous conditions of the estuary are complicated. It is essential to survey and evaluate the engineering geo-environment with the increasing human engineering activities in the Pearl River Estuary. The results of marine geology and geophysics investigations in recent years are collated. Based on the hazardous geology factors and engineering properties of seabed soil in the study area, the assessment index system of engineering geological environment is established. By hierarchy of analysis methods, the weight value of each assessment index is calculated. The Pearl River Estuary is then divided into 577 cells, and the engineering geological environment quality for each cell is evaluated using the fuzzy synthetic evaluation method. The study area is divided into five zones:stable zone, relatively stable zone, basically stable zone, relatively unstable zone, and unstable zone. The results show that 70% of the research area is stable, while 26% of it is relatively unstable or unstable. In addition to natural geological hazardous factors including active faults and earthquakes, the human engineering activities become more and more important to engineering geological environment quality.
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