广州国际机场浅层淤泥质土地基强夯试验研究

Test Study of Dynamic Compaction in Shallow Muddy Soil at Guangzhou International Airport

广州新白云国际机场拟建三跑道,等级为4F。三跑道北段地基内存在浅层淤泥质土,需要经过处理,才能满足跑道的要求。地基处理设计前,根据地质条件、工程特点与工期要求,选择结构填石强夯法进行地基处理试验。通过观测及检测成果分析,表明结构填石强夯适合浅层淤泥质土地基处理,经处理后的地基能满足跑道的要求,而且工期短、造价低。该试验为三跑道北段地基处理设计与施工提供了可靠的依据、参数和经验,为在高饱和度的软塑～流塑状态的粘性土地基上建设对变形控制要求严格的大面积工程,进行了有效的探索。

There was a 3rd runway of grade 4F planned to be built for the New Baiyun International Airport in Guangzhou. There was a shallow muddy soil in the foundation needed for treatment to satisfy the requirments to run- way. Before the design of soil treatment, the structural stonefill dynamic compaction had been chosen for test based on the geological conditions, engineering features and construction time requirements of the northern part of the 3rd Runway. By observation and analyzing detection results of the shallow muddy soil after dynamic compaction＇ it had been found that the structural stonefill dynamic compaction was suitable to shallow muddy soil treatment, the shallow muddy soil after dynamic compaction could satisfy the requirements of airport runway, so as to shorten construction period with low cost. The test provided reliable bases, parameters and experience to the design and construction of soil treatment for the northern part of the 3rd Runway. The test was an effectively exploratory research of soil treatment to high saturation of flexible plastic - current-state of clay in building large area project in which deformation is controlled strictly.