山东大学学报 (工学版) ›› 2023, Vol. 53 ›› Issue (6): 70-81.doi: 10.6040/j.issn.1672-3961.0.2023.093
王钰鑫1(),吕思忠2,姚望2,林春金1,*(),张明1,李召峰1,张健1,王衍升1
Yuxin WANG1(),Sizhong LÜ2,Wang YAO2,Chunjin LIN1,*(),Ming ZHANG1,Zhaofeng LI1,Jian ZHANG1,Yansheng WANG1
摘要:
针对粉质黏土地层在役桩基础承载力不足问题,采用数值模拟和现场试验相结合的方法实现在役桩基注浆加固参数设计与加固效果评价。通过浆脉施加体积应变的方法建立注浆压力传递有限元模型,研究不同注浆工况下粉质黏土地层桩侧径向压力的分布规律,提出注浆参数设计方法。土压力随距离的衰减是非线性的,在一定的土体参数下注浆压力为2.0 MPa, 注浆孔与桩侧距离为0.5 m时,传递到桩侧的径向压力较大。以京台高速改扩建现场桩基为模型,绘制不同工况下桩基承载力提升幅度等值线图,注浆加固后桩基承载力提高了30.3%~89.4%,为在役桩基加固效果提供参考。
中图分类号:
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