摘要
浆固碎石桩是一种新型的桩基技术,结合其在宁波绕城高速公路软土路基处理中的工程应用,进行了路堤下浆固碎石桩复合地基现场试验研究,通过实测地基的竖向和侧向变形以及桩、土应力和孔隙水压力,分析了浆固碎石桩复合地基的主要工作性状。试验结果表明,浆固碎石桩复合地基总沉降量小,稳定速度快,工期短;桩顶应力集中现象明显,桩体置换作用明显,同时也发挥了桩间土的承载力特性;孔隙水压力消散速度较快,减小了次固结引起的工后沉降。
Grouted gravel pile is a new technique of pile construction,load-bearing characteristics of grouted gravel pile composite foundation is analyzed based on its application to soft subgrade improvement of Ningbo round-city expressway.The settlement and lateral deformations of the subgrade are monitored in-situ;while the pore pressure,earth pressure between piles and pressure on the top of piles are also monitored.The monitor result indicates that： the total settlements are small and soon became stabilization,which is propitious for the construction;stress concentration on the top of piles is evident,which proved the replacement effect of pile is evident;pore pressure decreased soon,which reduced settlement after construction caused by secondary consolidation.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2010年第5期1559-1563,共5页
Rock and Soil Mechanics
基金
江苏省"六大高峰"人才基金资助(No.50528512)
关键词
浆固碎石桩
软土地基
地基处理
现场试验
复合地基
grouted gravel pile
soft foundation
foundation treatment
monitoring in-situ
complex foundation
