河北曹妃甸岛区工程地质环境稳定性评价研究

Evaluation research of engineering geological environment stability in Caofeidian island area of Hebei province

港口区工程地质环境安全关系着国计民生,对稳定社会和促进港口经济发展具有重要意义,因此研究和探讨港口区工程地质环境稳定性并进行综合评价就显得尤为重要。本文在总结相关研究成果并分析曹妃甸岛区地质环境数据的基础上,构建了工程地质环境稳定性评价指标体系,并采用专家打分法进行了综合评价。评价结果与研究区地质环境变化规律和后期观测结果基本一致,稳定性较差的地区主要分布在岛区东部及西南部曹妃甸深槽区域,主要为大规模的吹沙造地、工业建设,改变了原有的海洋动力系统,从而引起港区周围洋流、地貌特征、冲淤过程、泥沙运动的改变,导致航道的冲於,特别是深槽冲刷的加剧是影响地质环境稳定的主要因素。评价结果可作为研究区工程维护的参考依据,也为我国其它沿海港口重大工程地质环境稳定性评价提供了借鉴。

The safety of engineering geological environment in port area is closely related to the national economy and people’s livelihood,and is of great significance for stabilizing society and promoting the development of port economy.Therefore,it is of great historical significance and practice to study and discuss the comprehensive evaluation of the stability of engineering geological environment in port area.The paper based on the relevant research results and the geological environment data in this study area,the engineering geological environment stability evaluation index system was constructed.By using the expert scoring method,comprehensive assessment were accomplished to evaluate the geological environment stability.The research results were basically consistent with the law of regional geological environment change and later observation results.The areas with poor stability mainly distribute in the eastern and southwestern deep trough areas of the Caofeidian island area,mainly for large-scale sand-blowing land-making and industrial construction,which has changed the original marine dynamic system,thus causing changes in ocean currents,geomorphological characteristics,scouring and silting processes and sediment movement around the harbor area,leading to erosion and silting of the waterway,especially in the case of large-scale sand-blowing land-making and industrial construction.The intensification of deep trough erosion is the main factor affecting the stability of geological environment.The research results can be used as a reference for engineering maintenance and provided the basis for the assessment of major engineering geological environment stability in other coastal ports in China.