山东省潍坊市区域地壳稳定性分区与评价

Zoning and Evaluation of Regional Crust Stability in Weifang City of Shandong Province

摘要:

潍坊市位于沂沭断裂带北段东西地堑之间，地质构造复杂，地震活动性强，开展区域地壳稳定性评价对潍坊市城市建设及远景规划具有重要意义。该文通过综合断裂、地震地质、构造应力场、工程地质、水文地质、地质灾害等方面的调查研究资料，以ArcGIS为平台，采用模糊数学评判方法，对潍坊市区域地壳稳定性进行了探讨。研究结果表明，潍坊市以不稳定区为主，面积约8139.053km2，主要分布于沂沭断裂带两侧、端部、转折等部位；其次为稳定区，面积约4915.455km2，主要分布在北部平原区以及南部山区；不稳定区面积2328.811km2，主要分布在鄌郚葛沟断裂和昌邑大店断裂间中南部地段；较稳定区面积约1648.077km2，主要分布在西部和东部山区、断裂之间。

Abstract:

Weifang city is located between east and west grabens in north of Yishu fault belt with complex geological structures and strong seismic activities. It is of great significance to the construction of the city to carry out the assessment of regional crust stability and the prospect planning of Weifang city. In this paper, through comprehensive survey of faults, earthquake geology, tectonic stress, engineering geology, hydrogeology and geological disasters, taking ArcGIS as the platform, using the method of fuzzy mathematics, regional crust stability in Weifang city has been studied. It is showed that Weifang city is in the unstable region. The square is about 8139.053km2, and mainly distributed on both sides, the end and the turning parts of the fault zone. The square of the stable region is about 4915.455km2, and mainly distributed in the plain areas in the north and mountainous areas in the south. The square of unstable area is 2328.811km2, and mainly distributed in Tangwu-Gegou fault and Changyi-Dadian fracture between central and southern regions. The square of stable area is about 1648.077km2, and mainly distributed in the western and eastern mountains between the fracture.