摘要
以"表层岩溶带"地下水为主要研究对象,通过武汉地区主要碳酸盐岩分布区的4189个工程钻孔资料作为分析样本,结合大量水文地质试验数据统计和城市地质调查成果,在前人对区域地质构造格局和可溶岩条带状间隔分布研究的基础上,提出武汉市各岩溶水系统空间相对独立且不存在水量交换,内部两个基本水文地质单元亦无水力联系,总体与长江相互补排。从向斜蓄水构造、古地貌和水化学等研究角度,揭示了不同边界条件下的补给排泄方式和长江Ⅰ级阶地和剥蚀垄岗地貌下的岩溶水动力条件:地下水总体由向斜两翼向核部和轴部汇集,并由向斜扬起端向长江方向缓慢径流;中更新世及以后武汉地区基岩面以上接受第四纪沉积,表层岩溶带地下水循环减弱,现仅在临江地带可能形成水平岩溶水通道而活动性较强;地下水化学反应聚类分析计量关系表明岩溶水化学组份与岩性相关性弱。基于岩溶地下水特征,地下工程建设中的突涌致灾机率和等级不高,水位变化对诱发岩溶地面塌陷和结构防水设计有重要影响。
the"Epi-karst"ground water as the main research object,4189 borehole data from the main carbonate rock distribution area in Wuhan area used as analytical samples.Based on a large number of hydrogeological test data and urban geological survey results,the basis of previous studies on regional geological structure and the interval distribution of dissoluble rock strips,it is considered that the water system of Karst is relatively independent and has no water exchangeis no hydraulic connection between the two basic hydrogeological units in the interior,but there is complementary supply and discharge relationship between them and the Yangtze River.From the perspective of synclinewater-storing structure,paleogeomorphology and hydrochemistry,the way of recharge and discharge in different boundary conditions and the hydrodynamic conditions of karst water runoff in the first terrace of Yangtze River and in the denuded ridgelandform are revealed.The groundwater generally flow fromthe syncline wings to the coreand axis,and slowly runoff from the high point of the syncline to the Yangtze River.In the Middle Pleistocene and later,the surface of bedrock in Wuhan to accept the Quaternary deposition,the cycle of the groundwater in Epi-karst zone.The horizontal karst water channel is probably only formed in the riverside area so that will have more strongly activities.The quantitative analysis relation graph of the chemical reaction of groundwater is given to show that the correlation between the chemical composition of karst water and lithology is weak.Based on the characteristics of karst groundwater,the probability and level of sudden inrush in underground engineering construction is not high,and the water level change has an important impact on the induced karst ground collapse and structural waterproof design.
作者
张三定
朱红霞
王胜波
张召松
朱瑛洁
Zhang Sanding;Zhu Hongxia;Wang Shengbo;Zhang Zhaosong;Zhu Yingjie(Changjiang Geotechnical Engineering Corporation,Wuhan 430010,P.R.China;Wuhan Metro Group Co.,Ltd.,Wuhan 430030,P.R.China)
出处
《地下空间与工程学报》
CSCD
北大核心
2019年第S01期157-164,共8页
Chinese Journal of Underground Space and Engineering
基金
武汉地铁集团岩溶专题研究项目(42010620130628001)
武汉市城建委科技计划(201551).
关键词
岩溶水
表层岩溶带
蓄水构造
水文地单元
水动力条件
突涌
岩溶地面塌陷
karst water
Epi-karst
water storage structure
hydrological unit
hydrodynamic conditions
inrushing
karst collapse
