中文摘要：

根据勘察资料，采用统计分析方法对广州地铁六号线西段溶洞高度、顶板埋深、顶板厚度进行了研究。分析结果表明：溶洞高度差别较大，高度最大的溶洞位于浔峰岗-沙贝区间，但高度较大溶洞所占比例较小，大部分溶洞高度小于3m。首见溶洞顶板埋深变化较大，最大埋深38．55m，最小埋深7．8m，均位于沙贝-大坦沙区间。六号线西段首见溶洞顶板厚度最大达22．2m，最小为0．2m，均位于浔峰岗-沙贝区间，岩溶属于强发育，对工程影响较大，在地铁设计和施工时应引起足够重视。

英文摘要：

According to the investigation data, cave height, buried depth and thickness of the roof of the west section of Guangzhou Metro Line 6 were studied by using statistical analysis method. The results show that karst cave height difference is bigger, and the highest karst cave is located in the interval of Xungfenggang and Shabei, but the number of karst caves with large height in the total is small, and most of the karst cave height is less than 3 m. Buried depth of the first seen cave roof changes greatly. The maximum buried depth is 38.55 m and the minimum buried depth is 7.8 m, which locate in the Shabei-Datansha interval. The maximum thickness of cave roof is 22.2 m, and the minimum is 0.2 m, which are all in the Xunfenggang-Shabei interval. The influence of strong development karst on the engineering is bigger, which should be paid enough attention during design and construction stage.