基桩工程事故分析及桩端可重复高压注浆沉渣处理  

AN INVESTIGATION FOR SEDIMENT OF BORED PILE BOTTOM AND REPEATED HIGH PRESSURE GROUTING TREATMENT

作　　者：杨新辉[1,2] 陈阵 佟建兴 孙训海[1,2] 国玉娟 YANG Xin-hui;CHEN Zhen;TONG Jian-xing;SUN Xun-hai;GUO Yu-juan(China Academy of Building Research,100013,Beijing,China;National Engineering Research Center of Building Technology,100013,Beijing,China;Jingshui Construction Group,100193,Beijing,China)

机构地区：[1]中国建筑科学研究院地基基础研究所,北京100013 [2]国家建筑工程技术研究中心,北京100013 [3]北京京水建设集团有限公司,北京100193

出　　处：《建筑技术》2022年第2期136-139,共4页Architecture Technology

摘　　要：根据地勘、设计、施工资料及基桩检测成果,深入研究分析造成儋州某住宅项目的钻孔灌注桩桩底沉渣过厚的原因,采用桩底沉渣冲洗及桩端后注浆工艺对其桩底沉渣进行处理,并创新地提出可重复高压注浆技术,用于封闭桩底桩侧松散土层,保证了注浆加固效果。基桩检测成果表明,经处理的基桩承载力满足设计要求。Based on a comprehensive and thorough investigation, some reasons of the sediment of the bored piles of a foundation engineering in the Danzhou of the province Hainan were revealed.According to the test data, the sediment of bored piles were full of the resolution by the sedimentflushing and the technology of repeated high pressure grouting. The testing result demonstrated the bearing capacity of piles that treated by the repeated high pressure grouting satisfying the requirement of design. This paper points thoroughly out some causes of the serious sediments engineering accidents,and brings forward a proper technical solution.

关 键 词：基桩事故 钻孔灌注桩 桩底沉渣 可重复高压注浆 

分 类 号：TU74[建筑科学—建筑技术科学]