滇西玄武岩全强风化层工程特性及地基处理方法

Engineering Properties and Ground Treatment Method of Completely-highly Weathered Basalt in Western Yunnan

该文通过滇西某大型工程实践和长期的变形观测,系统地研究了该区玄武岩全风化层和强风化层的分布特征、工程特性和地基处理方法。结果表明:滇西玄武岩全强风化层分布极不均匀,具有高含水量、大孔隙比,高压缩性、低承载力的工程特性;原地面地基适宜处理方法是换填、碾压、冲压、强夯和桩基等,填筑体压实适宜方法是碾压以及冲压和强夯补强。该研究成果目前被当地广泛借鉴,对边贸、旅游飞速发展而建设经验十分缺乏的滇西地区的工程建设具有一定的指导意义。

Based on long-term deformation observation of a large-scale construction in western Yunnan, this paper gives a systematic research about the distributing characteristic, engineering properties and foundation treatment of completely-highly weathered basalt in this area. The results show that the distribu- tion of completely-highly weathered basalt in western Yunnan is uneven, which has the engineering prop- erties of high water content, big void ratio, high compressibility, low bearing capacity. The applicable treatment method of original ground foundation are replacement , compaction by rolling, stamping, dy- namic compaction and pile foundation, while treatments for settlement are compaction by rolling, stam- ping and reinforcing the dynamic compaction. The studies results are widely adopted by local people at present, and it plays an important guiding role for local engineering construction in which the tourisms and cross-border is rapidly developed while the construction experience is lack.