深厚软基刚柔组合桩复合地基变形特性研究  

Deformation Characteristics of Rigid-flexible Composite Foundation in Deep Soft Ground

作　　者：陈丽 CHEN Li(Laboratory of Quality Control of Engineering Projects in Zhenjiang New District,Zhenjiang,Jiangsu 212132,China)

机构地区：[1]镇江新区建设工程质量中心试验室,江苏镇江212132

出　　处：《水利与建筑工程学报》2019年第2期79-82,183,共5页Journal of Water Resources and Architectural Engineering

摘　　要：通过开展刚柔组合桩、水泥搅拌桩和堆载预压处理的现场试验,研究了不同地基处理方式下深厚软基的变形特性。发现:刚柔组合桩处理区域的土体最大沉降分别为水泥搅拌桩和堆载预压处理区域土体最大沉降的79%和49%;刚柔组合桩处理区域的土体最大水平位移仅为水泥搅拌桩处理区域土体最大水平位移的7.3%。这表明刚柔组合桩的深厚软基处理效果明显优于水泥搅拌桩和堆载预压处理。刚柔组合桩的管桩长度明显大于水泥搅拌桩,路堤荷载可以通过管桩传递到深层硬土层,进而减小路堤荷载作用下土体沉降和水平位移。By conducting field studies,deformation characteristics of soft ground treated by RFC composite foundation,cement mixing piles and preloading are revealed.By adopting the RFC foundation,the maximum ground settlements are only 79% and 49% of the maximum settlement of foundation treated by cement mixing piles and preloading,respectively.Moreover,the maximum lateral movement of foundation improved by RFC piles is only 7.3% of that improved by cement mixing piles.Obviously,the strengthening effects due to RFC piles are much better than the cement mixing piles and preloading.This is because the applied load can transfer to the deep soil by using RFC pile foundation.Accordingly,ground settlement and lateral movement are reduced.

关 键 词：刚柔组合桩 深厚软基 沉降 侧向变形 

分 类 号：TU433[建筑科学—岩土工程]