摘要
为了减小新旧桥梁桩基基础沉降差异对桥梁造成的影响,采用桩底后压浆技术对新建桥梁钻孔灌注桩进行处理,通过对加固后的钻孔灌注桩周围的土体进行取样可知,桩底后压浆技术可以有效提高钻孔灌注桩周围土体的摩阻力,提高桩的承载力,减小新旧桥梁基础沉降差,有关经验可供相关专业人员参考。
In order to decrease the influence of the pile foundation settlement difference on old and new bridges, the pile bottom post pressure grouting technology is used to treat the cast-in-situ pile of the newly built bridge. According to the sample of soil surrounding the reinforced cast-in-situ pile, it is shown that this technology can efficiently improve the frictional resistance of soil surrounding the cast-in-situ pile,improve the bearing capacity of pile and decrease the foundation settlement difference of old and new bridges. The relative experience can be referred for the similar projects.
出处
《城市道桥与防洪》
2014年第6期208-210,18,共3页
Urban Roads Bridges & Flood Control
关键词
桩底后压浆
桥梁改扩建
钻孔灌注桩
沉降差
pile bottom post pressure grouting,bridge reconstruction and extension,cast-in-situ pile,settlement difference