戈壁细粉砂土地质组合锤强夯地基处理施工技术

Construction Technology of Combined Hammer Dynamic Compaction Foundation Treatment of Gobi Fine Silt Soil Geology

青海省夏日哈木镍钴矿采选项目选矿系统工程总承包项目建筑安装工程位于青海省西部东昆仑西段,柴达木盆地南缘,属东昆仑山脉的分支,地形切割深,拟建场地是山间大滩,地质为戈壁细粉砂土,具有湿陷性。根据详细地勘资料及设计多方案比选,选择采用强夯法处理该地质的地基最为合适,实践证明,强夯法适用于处理碎石土、砂土、低饱和度的粉土与粘性土、湿陷性黄土、杂填土和素填土等地基。对高饱和度的粉土与黏性土等地基,当采用在夯坑内回填块石、碎石或其他粗颗粒材料进行强夯置换也适用。青海夏日哈木镍钴矿选矿项目经过现场试夯及实践验证了其可靠的适用性。本文对此展开详细探讨。

The construction and installation project of mineral processing system engineering general contracting project of Qinghai Province Xiarihamu Nickel-Cobalt Mine is located in the western section of East Kunlun in Qinghai Province,at the southern edge of the Qaidam Basin,which is a branch of the East Kunlun Mountains,with the deep cutting terrain.The proposed site is the mountain beach,the geology is gobi fine silt soil,which is collapsible.According to the detailed geological prospecting data and the design and comparison of multiple schemes,the dynamic compaction method is the most appropriate to treat the geological foundation.The practice has proved that the dynamic compaction method is suitable for the treatment of gravel soil,sand soil,low-saturation silt and clay soil,collapsible loess,miscellaneous filling soil and plain filling soil.For high-saturation silt and clay soil and other foundations,when the compaction pit is backfilled with block stone,gravel or other coarse particle materials,dynamic compaction replacement is also applicable.In mineral processing project of Qinghai Xiarihamu Nickel-Cobalt Mine,the on-site test compaction and practice have proved its reliable applicability.