真空联合堆载预压加固吹填土地基处理效果分析  

Analysis on the Effect of Foundation Treatment of Dredger Fill Soil Foundation by Vacuum Combined Surcharge Preloading

作　　者：杨磊勇 YANG Leiyong(Guangzhou Urban Planning,Surveying and Design Institute Co.,Ltd.,Guangzhou 510060,China)

机构地区：[1]广州市城市规划勘测设计研究院有限公司,广州510060

出　　处：《路基工程》2025年第1期69-73,共5页Subgrade Engineering

摘　　要：结合广西某工程南区地基加固项目,对真空联合堆载预压加固效果进行分析。分析表明:吹填土地基土层变化较大,相同深度每米淤泥土层压缩量较粉细砂层大60.7 mm;抽真空阶段表层沉降速率最大达到18.2 mm/d,远高于后续的堆载和联合堆载阶段;土层性质对孔隙水压力值稳定具有主导作用;经加固处理后,地基土体物理力学性质得到改善;加固过程中产生向外和向内的水平位移比值与荷载比有关,荷载比越大,位移比值越大,且临界深度越浅。The efficacy of vacuum combined surcharge preloading reinforcement is evaluated in conjunction with a foundation reinforcement project in the south area of a Guangxi-based project.The analysis indicates that the soil layer of the foundation in the blown land has undergone significant changes,with the compression amount of the silt soil layer per meter of the same depth being 60.7 mm greater than that of the fine powder sand layer.Furthermore,the maximum settlement rate of the surface layer in the vacuum stage reached 18.2 mm/d,which is considerably higher than that of The subsequent surcharge and combined surcharge stages;the nature of the soil layer exerts a dominant influence on the stabilization of the pore water pressure value;the physical and mechanical properties of the foundation soil body have been enhanced following treatment by the strengthening process;the ratio of outward and inward horizontal displacement produced during the strengthening process is related to the load ratio,and the load ratio is related to the load ratio.The ratio of outward and inward horizontal displacements generated during the process is related to the load ratio.As the load ratio increases,the displacement ratio and the critical depth decrease.

关 键 词：真空预压 联合堆载 吹填土地基 孔隙水压力 沉降率 含水率 荷载比 

分 类 号：TU433[建筑科学—岩土工程]