鲁北平原地面沉降现状与机理分析

该文详细论述了鲁北地区水文地质条件、工程地质条件。以多期水准测量数据为基础,以校验后的多年insar解译数据辅助,获取了鲁北地区地面沉降速率及多年累积地面沉降量。结果表明,鲁北平原年沉降速率大于50mm/a的地区面积502.73km~2,区内存在2个显著的沉降中心,一个位于德州市城区西北部张庄,地面累积沉降量超过1.3m,一个位于广饶县县城东北部,多年地面累积沉降量达1.605m,200mm沉降等值线圈闭面积14 904km~2,占鲁北平原区面积的34.34%。分析了鲁北平原地区地面沉降机理,建立了地面沉降与地下水水位相关关系,并针对现状问题提出了防治措施与建议。

Present Condition and Mechanism Analysis on Land Subsidence in Northern Shandong Plain

The hydrogeological and engineering geological conditions in northern Shandong area have been discussed in detail. The ground subsidence rate and accumulated land subsidence in northern Shandong area have obtained on the basis of multiperiod leveling data and with the aid of multiyear insar interpretation data after verification. It is showed that the square of sedimentation rate in Lubei plain which is greater than 50mm/a is 502.73km2. There are two significant settlement centers, one is located in Zhangzhuang in the northwest of Dezhou city, and the ground settlement of cumulative amount is more than 1.3m; the other one is in the northeast of Guangrao city with the ground settlement of cumulative amount of 1.605m, and 200mm settlement isoline trap area is 14904km2 which accounts for 34.34% of Lubei plain area. The mechanism of land subsidence in the northern plain of Shandong province has been analyzed, the relationship between ground subsidence and groundwater level has been established, and the prevention countermeasures and suggestions are put forward.