摘要
文章选择京沪高速铁路沿线的北京、廊坊、天津、沧州、德州等几个沉降中心的监测数据及研究资料,对比分析发现地面沉降发展与地下水位变化密切相关,依此建立了地面沉降与地下水位变化的经验关系,进一步分析预测了华北平原各主要沉降区地面沉降发展趋势。结果表明:北京地区地面沉降变化与水位变化线性相关明显,地面沉降对地下水位变化反应较灵敏,无明显临界水位;廊坊、天津及沧州地区显示指数相关,有较明显的临界水位,沉降过程存在初期缓慢沉降和快速沉降两个阶段;德州市在监测时段内显示二次函数相关,可能存在临界水位,但不如天津至沧州地区明显。各主要沉降区除天津市区地面沉降已经得到有效控制外,随着地下水资源的不断超采,过量消耗深层地下水储量,其它沉降区的地面沉降将持续发展,地面沉降灾害问题也必将日趋严重。
By examining the correlation between land subsidence and groundwater level variation, we can predict the development trend of land subsidence in the North China Plain with reasonable accuracy. Contrasting with the monitoring data of land subsidence in such cities as Beijing, Langfang, Tianjin, Cangzhou and Dezhou along the high speed railway form Beijing to Jinan, the relativity between land subsidence and changes in groundwater level analyzed, the correlation formulas between land subsidence and groundwater level drop are further established. The development trend of land subsidence in each of the main subsidence areas of the North China Plain are prodicted. The correlation between land subsidence and groundwater level variation in the Beijing region show an obvious linear relation. The land subsidence increases immediately along with the descending of groundwater level and there is no obvious critical groundwater level in this region. In the Langfang , Tianjin and Cangzhou regions, the relation between land subsidence and the changes in groundwater level indicates an exponent relativity and two stages of decline, the initial stage of slow decline and the subsequent stage of quick decline, and there are obvious critical groundwater levels. In the Dezhou region a quadratic functional relativity is found, indicating a critical groundwater level in the monitoring period, which is not so obvious as those in the Tianjin and Cangzhou regions. In addition to the Tianjin area in which land subsidence has already been controlled, the other main subsidence areas in which the deep groundwater is pumped continuously and the groundwater resources are consumed too much, will subside continuously. As a result, the disaster problem of land subsidence will be more serious than before.
出处
《水文地质工程地质》
CAS
CSCD
北大核心
2008年第6期90-94,98,共6页
Hydrogeology & Engineering Geology
基金
铁三院博士后基金课题“中国华北地区地面沉降对高速铁路桥梁、路基及轨道平顺性影响及对策研究”(720517)
关键词
地面沉降
地下水位
相关性
发展趋势
临界地下水位
land subsidence
groundwater level
correlation
development trend
critical groundwater level
