| 雷金山.广州岩溶塌陷形成条件及主要影响因素[J].地质与勘探,2009,45(4):488-492 |
| 广州岩溶塌陷形成条件及主要影响因素 |
| Analysis of Forming Conditions and Main Influential Factors of Karst Collapse in Guanzhou |
| 投稿时间：2009-01-02 修订日期：2009-07-06 |
| DOI： |
| 中文关键词: 岩溶塌陷 形成条件 影响因素 广州市 |
| 英文关键词: karst collapse,forming condition,influential factor,Guanzhou |
| 基金项目:湖南省自然科学基金资助项目(07JJ3104);广州市地下铁道总公司科技计划项目(09A003)。 |
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| 中文摘要: |
| [摘要]广州市岩溶塌陷主要分布在广州西北的广花盆地内,根据大量勘查资料分析,得出岩溶
塌陷形成条件及其主要影响因素是复杂和多方面的,如覆盖层岩土性状与厚度、岩溶发育程度、气候条
件、地下水与人类工程活动等。覆盖层土体结构越疏松、级配越好、强度越低、厚度越小,岩溶越发育,越
容易产生土洞和塌陷;降水季节和持续性的强降雨天气或久旱后的暴雨,极易导致地面塌陷;地下水活
动则促使或加速土洞及岩溶塌陷的形成;工程钻探、地下水的抽取、地下采矿及地下工程施工等人类工
程活动对岩溶塌陷也有重要影响,常作为诱发动力,通过改变基本条件而加速岩溶塌陷的形成。 |
| 英文摘要: |
| Abstract:Karst Collapse in Guanzhou摇mainly occur in the northwest called Guanghua Basin. Based on plenty of prospecting data, It is indicated
that the conditions of formation and main influential factors of karst collapse are complicated and various, including the characteristics and thickness of o鄄
verburden layer, development degree of karst, climate and precipitation, activities of groundwater and mankind engineering activities and so on. The more
loose the structure of overburden layer, the better soil gradation, the lower the sthength, the thiner the layer, the more intensive karst developments, the
more easily earth cavity and collapse occur. The precipitation season and strong rainfall or rainstorm after long period drougth easily causes karst collapse.
And activities of groundwater promote formation of earth cavity and karst collapse. Besides, human engineering activities, such as engineering drilling,
drawing water from the underground, milling, underground construction etc. , also have important influence on karst collapse. As an inducement power,
they speed up formation of karst collapse through changing basic conditions. |
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