| 广州金沙洲岩溶区地下水位变化与地面塌陷及地面沉降关系探讨 |
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| 引用本文： | 黄健民,邓雄文,胡让全.广州金沙洲岩溶区地下水位变化与地面塌陷及地面沉降关系探讨[J].中国地质,2015(1):300-307. |
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| 作者姓名： | 黄健民 邓雄文 胡让全 |
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| 作者单位： | 广州市地质调查院，广东 广州 510440 |
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| 基金项目： | “广州市白云区金沙洲岩溶地面塌陷、地面沉降地质灾害调查探测与监测”项目（ZX2012411007008）资助。 |
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| 摘 要： | 金沙洲可溶性灰岩分布面积广,岩溶洞隙发育,洞隙及地下水的连通性强,上覆第四系松散土体中软土广泛分布,客观存在岩溶地面塌陷及地面沉降的地质环境条件。2007年4月起,受某高铁隧道施工抽排地下水的影响,金沙洲地下水出现异常波动,引发了地面塌陷及地面沉降。文章根据监测数据,经对比分析结果表明,区内岩溶地面塌陷及地面沉降受控于地下水位的变化,地下水位波动至基岩面附近时,是地面塌陷较活跃的时期,地面沉降与地下水位变化呈正向相关。文章进一步对地面沉降与地下水位变化关系的机理进行了探讨,认为目前地下水位尚未恢复正常的区域仍存在地面塌陷及地面沉降的隐患。
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| 关 键 词： | 岩溶地面塌陷 地面沉降 地下水位 相关 发展趋势 |
The relationship between groundwater and ground collapse and land subsidence in Jinshazhou, Guangzhou City |
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| HUANG Jian-min,DENG Xiong-wen,HU Rang-quan.The relationship between groundwater and ground collapse and land subsidence in Jinshazhou, Guangzhou City[J].Chinese Geology,2015(1):300-307. |
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| Authors: | HUANG Jian-min DENG Xiong-wen HU Rang-quan |
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| Abstract: | Abstract: Soluble limestone and Quaternary loose soft soil are widely distributed in Jinshazhou. The fractures in limestone are rich and well connected with each other, which leads to a good connection of groundwater. All these factors provide objective geological environment conditions for karst ground collapse and land subsidence. Since April 2007, affected by tunnel groundwater pumping in high-speed rail construction, groundwater has fluctuated abnormally, which has resulted in ground subsidence and land collapse in Jinshazhou. The monitoring data and comparative analysis show that the karst ground subsidence and land collapse are controlled by groundwater level changes. When groundwater level fluctuates near the bedrock surface, the ground collapse occurs easily, and the land subsidence is related to groundwater level change positively. The relationship between land subsidence and groundwater level changes was also studied and, on such a basis, it is held that the area where groundwater has not yet returned to the normal level still has the hidden trouble of ground subsidence and land collapse. |
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| Keywords: | karst ground collapse land subsidence groundwater level correlation development trend |
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