采用钻孔灌注桩后注浆工艺条件下圆砾层的桩端设计参数取值探讨

摘要

钻孔后注浆工艺能有效提高单桩承载力,但注浆后具体桩端参数难以把握,本文通过杭州地区圆砾层中采用钻孔灌注桩后注浆工艺的工程实例,综合对比各类数据,提出了杭州地区在采用后注浆工艺条件下圆砾层的桩端设计参数的取值建议。%using post grouting for case-in-situ pile can increase the bearing capacity of drill-pouring pile.But the exact data of the ultimate tip resistance is indistinct.According to the project cases of using post grouting for case-in-situ pile in pebbles in Hangzhou district,this article makes the comprehensive comparison of various types of test dada,and gives some suggestions about the reasonable data of ultimate tip resistance after adopting post grouting for case-in-situ pile technology.