摘要
采用慢速维持荷载堆载法,分析采用3种不同后注浆条件(桩端注浆,桩侧注浆,联合注浆)及未注浆条件的桩基沉降特性,结果表明桩基采用后注浆能有效控制桩基桩顶沉降;与未注浆桩相比,桩端注浆桩可减少沉降0.86mm,桩侧注浆桩可减少沉降1.32mm,联合注浆桩可减少沉降1.42mm;采用后注浆后,桩基荷载-沉降曲线近似为直线,其极限荷载较未注浆有较大提高。
Based on the large-scale field test, the accumulation load methods adopted to study the influence of different post-grouted methods （post-tip-grouting, post-side-grouting, tip and side post-grouting） on settlement of pile top. The field tests show that the post-grouted method could decrease the settlement effectively. Compared with the non-grouted pile M1, the settlement of post-tip-grouted pile M2 decreases 0.86mm; the settlement of post-side-grouted pile M3 decreases 1.32mm; the settlement of tip and side post-grouted pile M4 decreases 1.42mm. After adopting post-grouting, the loading-settlement curves are similar to lines, the limited loading of which will increase dramatically.
出处
《建筑技术》
北大核心
2017年第3期233-235,共3页
Architecture Technology
基金
国家重点基础研究发展计划(2013CB036004)
关键词
堆载法
后注浆
沉降
荷载-沉降曲线
accumulation load method
post-grouting
settlement
loading-settlement curve
