直接加固含软土夹层地基的桩对沉降的影响分析  

Analysis of Influence Degree of High Pressure Jet Grouting Pile Reinforces Soft Interlayer Soil in Aspect of Foundation Settlement

作　　者：许斌[1] 贾宝 Xu bin;Jia bao

机构地区：[1]南京市建筑安装工程质量检测中心,南京210007

出　　处：《建筑技术开发》2020年第18期161-162,共2页Building Technology Development

摘　　要：含软土夹层地基,用高压旋喷桩仅加固中间软土夹层,不仅可提高软土地基承载力,相对于传统的桩基加固方法也降低了造价。结合芜湖高压旋喷桩加固软土夹层工程项目,提出了普通桩和扩大头桩加固含软土夹层地基的加固方式。为研究桩以及桩的扩大头对地基沉降的影响程度,开展了天然地基、高压旋喷桩加固含软土夹层地基、几种类型的扩大头的高压旋喷桩加固含软土夹层地基的数值模拟研究,揭示了桩及桩的扩大头对地基沉降的影响规律。Foundation contains soft clay interlayer.High pressure jet grouting pile only reinforces soft interlayer soil.This not only can improve the bearing capacity of soft soil foundation,but also reduces the cost relatived to traditional pile foundation reinforcement method.In combination with the high pressure jet grouting pile reinforcing soft clay interlayer in Wuhu project,we proposed a construction method that ordinary pile and the pile of expanding head of pile reinforces soft interlayer soil.For the study the influence capacity of the pile and the pile of expanding head in the aspect of the foundation settlement,we carried out the numerical simulation research on the natural foundation,the foundation of high pressure jet grouting pile reinforces soft interlayer soil and the foundation of high pressure jet grouting pile of several types of expanding head reinforces soft interlayer soil.The results reveal a law that the pile and the expanding head influence the foundation settlement.

关 键 词：高压旋喷桩 数值模拟 沉降 软基加固 软土夹层 

分 类 号：TU472.31[建筑科学—结构工程]