辽东湾吹填土工程适宜性系统综合评价遥感分区研究

根据区域的TM,SPOT影像所持有的宏观性、概括性强、信息丰富、线性影像特征清晰等特点,判别吹填土区域的范围,并结合野外的实际勘察及相关室内试验的结果,使其发挥成图技术快、质量高、成本低的特点。选择场地环境、工程物理性质、力学性质及固结时间4个二级评价影响因素和相对应的地下水水质、成因组合类型、盐渍化、岩土类型、黏粒含量、液性指标、含水量、孔隙比、内聚力、内摩擦力、压缩系数、压缩模量和固结时间13个一级单因素评价指标,本文采用层次分析法,构建多层次分析结构模型,计算出各评价指标的权重,并通过归一化评价指标,建立辽东湾吹填土工程适宜性遥感分区系统综合评判模型。对辽东湾吹填场地工程适宜性优劣提出分区评价Ⅰ区、Ⅱ区、Ⅲ区,以期能给该区的工程建设以及其他吹填地区的工程适宜性分区提供参考并提高经济效益和社会效益。

SYSTEM COMPREHENSIVE EVALUATION OF ENGINEERING GEOLOGICAL REMOTE SENSING ZONING AT LIAODONG BAY

According to the regional TM and SPOT vision, the scope of hydraulic fill region can be decided with embracing strong, information-rich, clear linear imaging features and other characteristics. The hydraulic fill region should be combined with the results of field prospecting and indoor test. Mapping technology can make work fast, high quality and low cost. In addition, the second level evaluating influence factors include field surroundings, project property, mechanics property and consolidation time, and relatively. Another 13 first level single-factor evaluating indicators include groundwater level and quality, type of cause's combination, salinization, type of rock and soil mass, clay content, liquidity index, water content, porosity ratio, cohesion, internal friction, compressibility, compression modulus and consolidation time. They are chosen for the system comprehensive evaluation. The evaluation index weight is determined by AHP.They are normalized for hydraulic fill project of Liaodong Bay. The engineering suitability remote sensing zoning is used to make the zones Ⅰ, Ⅱ and Ⅲ. The results are used to propose zone of the result of hydraulic fill region suitability, to provide the reference for the engineering construction of this region and for engineering suitability zoning of other hydraulic fill region and to improve the economic and social benefits.