高震区声测管兼做注浆管提高桩基承载力  

Pile Foundation in High Earthquake Area Using Acoustic Pipe and Grouting Pipe to Improve Bearing Capacity

作　　者：李波 荣蓉 崔亚军 王维 尹蕴锋 刘俊强 赵金龙 LI Bo;RONG Rong;CUI Yajun;WANG Wei;YIN Yunfeng;LIU Junqiang;ZHAO Jinlong(China State Railway Investment Construction Group Co.,Ltd.,Beijing 100053,China)

机构地区：[1]中建铁路投资建设集团有限公司,北京100053

出　　处：《施工技术》2020年第S01期168-170,共3页Construction Technology

摘　　要：高架桥主要采用桩基承台的基础形式,为确保基础的施工质量,快速、科学、准确的桩基质量检测方法,就显得尤为重要。另一方面,如何提高高架桥的基础承载力,降低不均匀沉降,高震区是目前基础结构设计施工中需着重关注的问题。传统提高灌注桩承载能力的方法有加大桩长、扩大桩径等,虽效果明显,但增加材料及工程量,成本增大,而采用桩端后注浆法,可在不增加桩长桩径的前提下,增强桩基承载力,经济便捷,符合绿色施工要求。The viaduct mainly adopts the foundation form of pile cap,in order to ensure the construction quality of the foundation,a fast,scientific and accurate method of pile quality detection is particularly important.On the other hand,how to improve the bearing capacity of the viaduct foundation and reduce the uneven settlement,especially for the high earthquake area,is the problem that should be paid attention to in the design and construction of the foundation structure.The traditional methods to improve the bearing capacity of the cast-in-place pile include increasing the length and diameter of the pile.Although the effect is obvious,the material and engineering quantity are increased,and the cost is increased.However,the method of post grouting at the end of the pile can enhance the bearing capacity of the concrete pile without increasing the length and diameter of the pile,which is economical and convenient,and meets the requirements of green construction.

关 键 词：高震区 声测法 桩端注浆 桩基 承载力 

分 类 号：U443.15[建筑科学—桥梁与隧道工程]