河谷平原跨区域工程地质层序厘定与平面分区方法——以安徽沿江地区为例  

Stratigraphic ordering and regionalization of engineering geology in large area of valley plain:a case study along the Yangtze River in Anhui Province

作　　者：杨洋 苏晶文[1,2] 李云峰 王睿[1,2] 张庆 YANG Yang;SU Jingwen;LI Yunfeng;WANG Rui;ZHANG Qing(Nanjing Center,China Geological Survey,Nanjing 210016,Jiangsu,China;Engineering Innovation Center for Urban Underground Space Exploration and Evaluation,MNR,Nanjing 210016,Jiangsu,China)

机构地区：[1]中国地质调查局南京地质调查中心,江苏南京210016 [2]自然资源部城市地下空间探测评价工程技术创新中心,江苏南京210016

出　　处：《地质通报》2022年第11期2019-2025,共7页Geological Bulletin of China

基　　金：中国地质调查局项目《皖江城市群综合地质调查》(编号:DD20190261);江苏省地质矿产勘查局科研项目《基于地质环境要素的城市地下空间资源三维质量评价研究》(编号:2019KY01)。

摘　　要：随着中国城市群建设的不断深入,城市群一体化开发已上升为国家战略,但跨区域工程建设面临着工程地质层划分标准不统一、工程地质分区不系统等问题,制约了工程地质资料的区域共享与重大工程的一体化开发。提出了以第四系土体的沉积环境演化为基础,综合土体结构特征、物理力学状态及空间分布特征的工程地质层序厘定方法。在此基础上,基于区域沉积环境演化规律提出工程地质分区方法,对重点地区识别影响工程建设的关键地质层,划分工程地质段。以安徽沿江地区为例,结合33个150000标准图幅工程地质调查工作,系统梳理了安徽沿江地区地貌特征和第四纪地层特征,建立了标准工程地质层,共5个主层,17个亚层;建立了河谷平原跨区域工程地质分区,共2个大区,6个亚区,为皖江城市群沿江地区工程规划建设提供了工程地质基础格架。研究成果可为河谷平原型城市群的工程地质层序厘定与平面分区提供新思路。With the development of urban agglomeration in China,the integrated development of urban agglomeration has become a national strategy.However,cross-regional engineering construction is faced with the problems of disunity of engineering geological stratum division standards and unsystematic engineering geological zoning.The regional sharing of engineering geological data and the integrated development of major projects are restricted.Based on the evolution of sedimentary environment of Quaternary soils,an engineering geological sequence determination method is present in this paper,which integrates the structural characteristics,physical-mechanical conditions and spatial distribution characteristics of soils.On this basis,the key geological strata affecting the engineering construction are identified,and the engineering geological zoning method based on the distribution of key engineering geological strata is proposed.Finally,taking the area along the Yangtze River in Anhui Province as an example,the geomorphic characteristics and Quaternary stratigraphic characteristics are systematically analyzed through engineering geological survey of thirtythree 1:50000 standard maps.Standard engineering geological strata have been established,including 5 main layers and 17 sub-layers.Besides,engineering geological zoning has been established,including 2 first-level zones and 6 sub-zones.The results provide an engineering geological foundation framework for engineering planning and construction of along the Yangtze River in Anhui Province.The research results can provide new ideas for stratigraphic ordering and regionalization of engineering geology of urban agglomeration in river valley plain.

关 键 词：河谷平原 沉积环境 工程地质层序 平面分区 

分 类 号：P642.4[天文地球—工程地质学]