管桩复合地基联合DPD强夯处理盐渍土的工程应用  

Engineering application of pipe pile composite foundation combined with DPD dynamic compaction to treat saline soil

作　　者：巩磊 刘念 沈勇 Gong Lei;Liu Nian;Shen Yong(China Communication Construction Group Real Esate Development(Bejing)Co.Ltd,Bejing 100016,China;Institute of Foundation Engineering,China Academy of Building Research,Beijing 100013,China;Qinghai Salt Lake Industry Co.Ltd,Golmud 816000,China)

机构地区：[1]中交房地产开发(北京)有限公司,北京100016 [2]建研地基基础工程有限责任公司,北京100013 [3]青海盐湖镁业股份有限公司,青海格尔木816000

出　　处：《建筑科学》2022年第7期157-162,共6页Building Science

摘　　要：青海察尔汗盐湖地区地基多为饱和盐渍软土,具有强腐蚀性,其地基处理是一个行业难题。某烟囱位于察尔汗盐湖,地基承载力要求较高,已有DPD强夯法能解决强腐蚀性问题,但承载力提高幅度有限。为解决其高承载力及变形控制问题,经技术经济比较,在DPD强夯法基础上,创新采用联合预应力混凝土管桩复合地基方案进行处理,将地基承载力从180kPa提高至280kPa。该工程使用多年,效果良好。The foundation of Qarhan Salt Lake in Qinghai Province is saturated soft soil with strong corrosion, and its treatment is an industry problem. A chimney is located in Qarhan Salt Lake, and the bearing capacity of foundation soil is required to be high. DPD dynamic compaction method has been used to solve the problem of strong corrosion, but the increase of bearing capacity is limited. In order to meet the requirements of high bearing capacity and deformation control, through technical and economic comparison, the composite foundation scheme of adding prestressed concrete pipe pile on the basis of DPD dynamic compaction method is proposed. The bearing capacity of the foundation is improved from 180 kPa to 280 kPa. The project has been used for many years with good results.

关 键 词：盐渍土 DPD强夯 预应力管桩 复合地基 

分 类 号：TU448[建筑科学—岩土工程]