路堤刚性桩复合地基褥垫层设计探讨  

Research on Cushion Design of Embankment Rigid Pile Composite Foundation

作　　者：王志成[1] WANG Zhicheng(CCCC Second Highway Consultants Co.,Ltd.,Wuhan 430056,China)

机构地区：[1]中交第二公路勘察设计研究院有限公司,武汉430056

出　　处：《路基工程》2022年第2期110-114,共5页Subgrade Engineering

摘　　要：以湖北某沿江高速公路工程为依托,通过对刚、柔性基础下刚性桩复合地基的性状差异分析,对路堤刚性桩复合地基褥垫层设计进行改进,取消传统桩顶加筋碎石褥垫层,在桩顶加设桩帽,桩顶设计一定厚度石灰(水泥)改善土层。从桩土荷载分担、路堤破坏、上刺入量几个方面对方案进行分析与计算。结果表明:从现场观测及调查来看,技术、经济都能达到很好的效果。Based on a riverside expressway project in Hubei, through the analysis of the different performances of rigid pile composite foundation under rigid and flexible foundation, the embankment mattress layer of rigid pile composite foundation design has been improved by canceling the traditional pile top+reinforced gravel mattress,setting the pile caps at the pile top and designing a certain thickness of lime(cement) to improve the soil layer.The scheme has been analyzed and calculated from the aspects of pile and soil load sharing, embankment damage and upward penetration. The result shows that good results of the technical and economic can be achieved from on-site observation and investigation.

关 键 词：复合地基 褥垫层 石灰(水泥)改善土 桩土应力比 路堤破坏 上刺入量 

分 类 号：U418.5[交通运输工程—道路与铁道工程]