摘要
在港口工程建设中,快速加固超软弱的吹填地基,采用真空预压法是一个经济有效的方法,再联合以碎石桩加固则能进一步提高地基的承载力、减少地基工后沉降。通过真空预压联合碎石桩加固地基的现场试验以及观测资料的分析,得出真空预压联合碎石桩加固后地基的承载力特征值由原天然地基的60 kPa左右提高到220 kPa,计算结果表明施打碎石桩后的地基变形模量Esp与真空预压后的Ea相比提高了1倍,联合碎石桩加固后的地基沉降量比仅经过真空预压的地基减少1/3。
The vaccum preloading and broken stone pile method is an economic and effective method for quickly consolidating the weak reclamation foundation, and the method can improve the bearing capacity of foundation and reduce the foundation settlement after completion of project. The field test and observation data of foundation consolidation by means of vaccum preloading and broken stone pile were analyzed, and it is shown from the analysis results that the characteristic bearing capacity of the consolidated foundation has increased from 60 kPa of that of original foundation to 220 kPa, the deformation modulus of foundation consolidated by driving broken stone piles and vaccum preloading is twice that consolidated by means of only vaccum preloading, and the settlement volume of foundatioin consolidated by driving broken stone piles and vaccum preloading decreased only by one third compared with that consolidated by means of only vaccum preloading.
出处
《海岸工程》
2007年第1期41-47,共7页
Coastal Engineering
关键词
真空预压联合碎石桩
承载力
变形模量
沉降
vaccum preloading and broken stone pile
bearing capacity
deformation modulus
settlement
