徐州市第四纪标准地层划分研究

Study on division of Quaternary standard strata in Xuzhou City

针对城市基础地质调查中的地下空间资源与开发适宜性问题,同时规范工程地质地层层组与层序的划分工作,以徐州市城市调查为基础,对徐州城市规划区内自然地面50 m以浅岩土层进行详细分层,并以层组为基础,岩土工程特性为依据,按沉积环境及沉积顺序进行标准地层科学划分编号,最后结合地貌成因及主要形态进行工程地质结构分区。研究结果表明:研究区第四纪地层按层组可划分为14个层组,其中全新统为1-4层,上更新统为5-10层,下更新统为11-13层,新近系为14层;按工程结构可分为低山丘陵区(A)、山前倾斜平原区(B)、松散堆积平原区(C),第四纪地层主要分布在B区和C区。研究成果为类似城市地下空间资源开发与利用提供了可行的参考依据。

Aiming at the problems of underground space resources and development suitability in urban basic geological surveys,the division of engineering geological stratum groups and sequences is also standardized.Based on the urban survey of Xuzhou City,shallow rocks of 50 m natural ground in the urban planning area of Xuzhou,the soil layer is layered in detail,based on the layer group and based on geotechnical engineering characteristics.Standard stratigraphic scientific division and numbering is carried out according to the sedimentary environment and sedimentary order.Finally,the geological structure of the structure is divided according to the genesis and main forms.Research results show that the Quaternary strata in the study area can be divided into 14 strata by strata,of which the Neogene is 1-4 layers,the Upper Pleistocene is 5-10 layers,the Lower Pleistocene is 11-13 layers,and the Neogene is divided into 14 layers.According to the engineering structure,it can be divided into low mountain hilly area(A),piedmont plain area(B)and loose accumulation plain area(C).Quaternary strata are mainly distributed in areas B and C.The research results provide a feasible reference for the development and utilization of underground space resources in similar cities.