江西省九江市规划区地质灾害易发性评估

Assessment of easy generation of geological hazards in plan regions of Jiujiang City, Jiangxi Province

在阐述九江市规划区的地质背景、地形地貌特征和水文地质、工程地质条件及其地质灾害发育现状的基础上,对规划区的地质灾害易发性进行了较详细的评估,圈定出十里铺、沙河街和狮子3个地面塌陷易发区;国棉二厂、官湖、炼油厂和沙河街4个地面塌陷较易发区。在规划区内选取11个均为土岩混合斜坡,斜坡坡度15°~30°,斜坡高度20m^100m,强风化带厚度和残坡积层厚度均小于3m的自然斜坡进行评估,其中有6个为稳定性中等,占总数的54.5%,稳定性好的5个,占总数的45.5%。并提出了地质灾害防治建议。

Easy generation of geological hazards is detailed evaluated in plan regions on the basis of geological background, geomorphologic characteristics, hydrogeological and engineering geological conditions, and developing actuality of geological hazards. This paper circles three easy generate districst of surface subsidence involve in Shilipu, shahe street and lion, and four more easy generate districts are divided involve in the second cotton factory of nation, Guanhu, oil refining factory and Shahe street. Eleven natural soil- rock mixed slopes are evaluated which of grade froml5 to 30 degree, slope height from 20 to 100 metre, the thickness of strong weathering zone and eluvial- talus isn＇t exceed 3 metre within the plan regions,among them which six slopes are middling stability account percent of 54.5 for totality, and five slopes are better stability account percent of 45.5 for totality. Suggestion of geological hazards is puff forward prevention and cure which geoscience basis is provided for City planning, constructing and social - economical persistent developing.