某高层建筑桩基事故分析与加固处理措施研究  

Analysis on Accident and Corresponding Treatment Measures of Piles Instrumented in a Tall Building

作　　者：吴明[1,2] 彭建兵[1,2] 王淑贤 孟舒然 臧明东 

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]长安大学西部矿产资源与地质工程教育部重点实验室,陕西西安710054 [3]陕西水环境工程勘测设计院,陕西西安710018

出　　处：《施工技术》2014年第16期36-39,共4页Construction Technology

基　　金：西部矿产资源与地质工程教育部重点实验室开放基金(2013G1502006);中央高校基金(创新团队项目)(2013G3294013)

摘　　要：通过低应变动测、钻探取芯、静载试验等检测手段分析了某高层建筑钻孔灌注桩存在的问题及桩基事故产生的原因。在对桩基事故详细分析的基础上,给出了桩基承载力不足和沉降过大桩基事故处理的补打钻孔灌注桩加基础厚底板方案。实践表明,该加固方案是可行的,不仅可满足桩基承载力的要求,且可减小群桩基础的差异沉降。This paper analyzes an accident of bored piles instrumented in a tall building and proposes the cause of the accident using low strain dynamic testing, drilling core and static load test. Based on the detailed analysis of the accident of bored piles, reinforcement scheme composed of bored pile and thick beam-slab raft foundation can be used to treat the accident of large settlement and shortage of bearing capacity of bored piles. Engineering practice indicates that this reinforcement scheme is feasible, and can meet the requirement of pile bearing capacity, as well as decrease the differential settlement of pile groups.

关 键 词：高层建筑 桩 差异沉降 承载力 事故 加固 

分 类 号：TU473.1[建筑科学—结构工程]