云南省高原型岩溶地基稳定性和适宜性评价

Evaluation on stability and suitability of plateau-type karst foundations in Yunnan Province

昆明长水国际机场位于云南省昆明市官渡区大板桥,区域内地理环境复杂,南部主要为高原型岩溶地质,北部为构造剥蚀丘陵和山前洪积扇、山间凹地,以此区域的扩建工程为例,对场地岩溶分布特征、发育规律进行探究,通过定性分析和理论计算对扩建场地地基岩溶稳定性进行初步评价,再结合经验判断提出相关建议,最后对研究区进行工程建设适宜性评价。结果表明:区域内发生岩溶塌陷的可能性小,大部分地段基本稳定,仅需对部分区域进行特殊处理,86.3%的研究区工程建设适宜性为适宜和基本适宜。研究结果可为项目可行性研究提供依据。

Kunming Changshui International Airport is located in Dabanqiao Street,Guandu District,Kunming City,Yunnan Province,with complex geographical environment,where its southern part is mainly karst geologic of plateau type,and the northern part is tectonic erosion hills and piedmont alluvial fans.Taking a extension project of this region as an example,we studied the distribution characteristics and development regularity of karst.Through qualitative analysis and theoretical calculation,the karst stability of the expansion site was preliminarily evaluated,and relevant suggestions were made based on empirical judgment.Finally,the suitability of engineering construction in the research area was evaluated.The results show that the possibility of karst collapse in the area is small,and most of the areas are basically stable,only some areas need special treatment,and 86.3%of the research area is suitable for the expansion project.The research results can provide basis for project feasibility research.