摘要
本文在分析以往地质资料和完成的武汉市1∶5万岩溶塌陷调查成果的基础上,从武汉市岩溶发育的形态及规模、不同岩溶条带、不同构造条件、不同地层、不同埋深和不同地貌七个方面,分别系统总结了武汉市典型地区岩溶发育的特征。区内岩溶总体中等发育,岩溶形态主要为溶隙、溶孔以及小规模溶洞;在水平方向上存在5个走向NWW—SEE、各自相对独立的碳酸盐岩条带,其中白沙洲条带岩溶最为发育,在垂直方向上浅层溶蚀发育;各地层的岩溶发育强度依次为P2q> T1d> C2h+d> T1-2j;在褶皱核部或转折端、断层带附近、长江一级阶地、山前补给局部地区等地下水交替循环强烈地带和可溶岩与非可溶岩接触带,岩溶发育相对强烈。结论可为武汉市岩溶塌陷地质灾害防治提供地质基础支撑。
On the basis of analyzing the previous geological data including the results from 1∶ 50 000 survey on the karst collapse of Wuhan City,the present paper systematically summarizes the characteristics of karst development at typical areas of Wuhan City in perspectives of seven aspects,including the shape and size of karst development,karst belts,tectonic conditions,strata,burial depth and geomorphology. The results indicate that the karst development is generally moderate,and karst morphology are mainly karst fissure,karst pore and small-size karst cave. There are five NWW-SEE and relatively independent carbonate rock belts in the horizontal direction,among which the karst is the most developed for Baishazhou belt,whereas the shallow corrosion is developed in the vertical direction. The karst development levels for various strata are in order of P2 q,T1 d,C2 h + d and T1-2 j. In general,karst is relatively more developed in two types of zones. One is the active zone of groundwater cycle including the cores or hinge zone of folds,the vicinity of fault zone,the first terrace of Yangtze River and piedmont recharge area,and another is the contact zone between dissoluble rock and insoluble rock. The conclusions of this paper can provide basic supporting geological information for the control on the karst collapse hazards in Wuhan.
引文
[1]官善友,蒙核量,周淼.武汉市岩溶分布与发育规律[J].城市勘测,2008(4):145-149.GUAN Shanyou,MENG Heliang,ZHOU Miao. The distributing and growing rules of Karst in Wuhan[J].Urban Geotechnical Investigation&Surveying,2008(4):145-149.
[2]涂婧,杨涛,刘长宪,等.基于GIS武汉岩溶塌陷区岩溶发育规律研究[J].资源环境与工程,2014,28(1):49-52.TU Jing,YANG Tao,LIU Changxian,et al. Study on karst development law in Wuhan karst collapse area based on GIS[J]. Resources Environment&Engineering,2014,28(1):49-52.
[3]罗小杰.试论武汉地区构造演化与岩溶发育史[J].中国岩溶,2013,32(2):195-202.LUO Xiaojie. On the history of tectonic evolution and karstification in Wuhan[J]. Carsologica Sinica,2013,32(2):195-202.
[4]邓杰,李定远,周鼎,等.武汉地区构造与岩溶发育程度关系的初步探讨[J].资源环境与工程,2014,28(增刊1):58-67.DENG Jie,LI Dingyuan,ZHOU Ding, et al.Preliminary discussion on the relationship between tectonic and karst development level in Wuhan[J].Resources Environment&Engineering,2014,28(S1):58-67.
[5]武汉市轨道交通27号线一期工程岩溶处理项目报告[R]. 2016.Report on karst treatment project of phase I project of rail transit line 27 in Wuhan[R]. 2016.
[6]中国地质环境监测院,湖北省地质环境总站.武汉市岩溶塌陷调查项目成果报告[R]. 2016.China Geological Environmental Monitoring Institute,Hubei Geological Survey. Report on the results of the karst collapse investigation in Wuhan.[R]. 2016.
[7]罗小杰.武汉地区浅层岩溶发育特征与岩溶塌陷灾害防治[J].中国岩溶,2013,32(4):419-432.LUO Xiaojie. Features of the shallow karst development and control of karst collapse in Wuhan[J]. Carsologica Sinica,2013,32(4):419-432.