广州临空经济示范区岩溶发育特征研究
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摘要
整理并分析了广州临空经济示范区范围内1790多个钻孔数据,总结了区内岩溶在横向和纵向上的分布规律,进而探讨了岩溶成因机理。结果表明:可溶岩岩性是影响岩溶发育的主要因素,不同岩性间有较显著差别;地下水活动对岩溶发育层位有重要影响,受地下水浅部交替循环影响,随着埋深增加,溶洞规模变大;构造对岩溶发育影响不明显;同一地层中,线岩溶率对比见洞率相对偏低,其主要原因可能是钻孔深度偏小,入岩进尺偏少。
By sorting out and analyzing the data of more than 1790 boreholes in Guangzhou airport economic demonstration zone, this paper summarizes the distribution law of karst in the zone in both horizontal and vertical directions, so as to discuss the karst genetic mechanism. The results show that the lithology of soluble rock is the main factor affecting karst development, and there are significant differences among different lithology. Groundwater activity has an important influence on karst development horizon, which is affected by the alternating circulation of shallow groundwater. The effect of structure on karst development is not obvious. In the same formation, the linear karst rate is relatively low compared with the hole rate.The main reason may be that the drilling depth is relatively small and the penetration is relatively small.
By sorting out and analyzing the data of more than 1790 boreholes in Guangzhou airport economic demonstration zone, this paper summarizes the distribution law of karst in the zone in both horizontal and vertical directions, so as to discuss the karst genetic mechanism. The results show that the lithology of soluble rock is the main factor affecting karst development, and there are significant differences among different lithology. Groundwater activity has an important influence on karst development horizon, which is affected by the alternating circulation of shallow groundwater. The effect of structure on karst development is not obvious. In the same formation, the linear karst rate is relatively low compared with the hole rate.The main reason may be that the drilling depth is relatively small and the penetration is relatively small.
引文
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[2]黄健民,吕镁娜,郭宇,等.广州金沙洲岩溶地面塌陷地质灾害成因分析[J].中国岩溶,2013,32(2):167～174.
[3]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,2015,42(1):300～307.
[4]广州市白云区岩溶塌陷风险初探[J].岩土力学,2013,34(9):2589～2600.
[5]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.