摘要
随着我国城市化进程的加快,城市供水、地下空间资源利用、建筑物地基处理、垃圾安全处置等工作,越来越与地质工作紧密相关,特别是许多在第四纪沉积物基础上建设的大都市,都面临着地震、活动断裂、地面沉降、水资源紧缺、建设空间不足、环境恶化等方面的威胁。北京市作为世界上少数几个著名的巨型城市之一,也面临着同样的问题。这些城市的生存和发展与第四纪松散沉积物关系密切,为了预防或减少上述问题的发生,需要详细了解第四系的三维地质结构,提供地质体空间详实的展布资料。本文在详细地介绍了北京平原区第四系的分布、类型和特点的基础上,对北京市平原区第四纪松散沉积物开展三维地质结构调查的方法进行了深入研究,提出了建立三维地质结构模型的步骤和程序。在此基础上建立了北京平原区三维立体地质结构数字模型。为在城市地区开展第四纪地质调查工作进行了新探索,并取得了较好的效果。
With China＇s urbanization speeding up, increasing urban construction such as city water supply, utilization of underground space resources, ground improvement, garbage disposal are closely related to geological work. Especially, metropolitan cities building on the Quaternary are being threatened from earthquake, active faulting, land subsidence, water shortage, scarce land, environmental deterioration, etc. Beijing, as one of the few gigantic metropolitan cities around the world, has no exception. But the subsistence and development of these cities are indispensable to the Quaternary unconsolidated sediments. Therefore, it is essential to understand the 3-D geologic structures of the Quaternary, because it will provide detailed spatial distribution data of geological bodies so as to prevent and reduce the occurrences of above-mentioned disasters. This study based on the distribution, type and features of the Beijing Quaternary plain put forward an approach to establish the 3-D geological structural model, upon which the 3-D digital model of geological bodies in the piedmont plain in Beijing was established. This provides a new mean for conducting geological investigation on the Quaternary and achieved a satisfactory application result.
出处
《地质学报》
EI
CAS
CSCD
北大核心
2009年第7期1047-1057,共11页
Acta Geologica Sinica
基金
国土资源部与北京市政府合作的北京市多参数立体地质调查项目(编号基[2004]011-01)部分资助的成果
关键词
第四纪沉积物
三维地质结构
冲洪积扇
Quaternary sediments
3-D geological structure
alluvial and flood fan
