后注浆工艺在BARAKI体育场项目应用的探讨  

Discussion on the post grouting technique used in BARAKI stadium project

作　　者：闫建[1] 许慧 张武[1] 姚晓旭[1] 张波[1] 

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]中铁建工集团国际工程公司,北京100070

出　　处：《工程勘察》2015年第12期27-31,共5页Geotechnical Investigation & Surveying

摘　　要：采用静载荷试验2次循环加载法对阿尔及利亚BARAKI体育场注浆桩和非注浆桩的承载能力进行研究,在桩身不同地质剖面埋设钢筋应力计测量桩身轴力,并获得较好的测试效果。通过对注浆桩与非注浆桩测试数据分析,后注浆工艺在BARAKI体育场项目的应用是可行的,后注浆工艺可显著提高单桩竖向抗压承载力,改善桩身受力状态,可将原设计工程桩的有效桩长80~98m缩减至60m,同时也为阿尔及利亚国家类似工程后注浆钻孔灌注桩的设计和深入研究提供了参考。The bearing capacity with the post grouting and the non-grouting for the cast-in-situ piles by using the static loading tests with the method of twice cyclic loading to the BARAKI stadium project in Algerian is studied. With the wonderful test results,the axial forces of the piles are measured,which embedded reinforcement stress meters in different geological section. The test data could prove that the technique with the post grouting for cast-in-situ piles can be used in BARAKI stadium project. This technique can improve the vertical compressive bearing capacity of single pile,and improve the stress state of the pile. It can decrease the pile length from 80 ~ 98 m to 60 m,and this technique also provides the reference in this area for the similar project with post grouting technical design and the study in future.

关 键 词：桩基 钻孔灌注桩 灌注桩后注浆 桩顶位移 

分 类 号：TU473.1[建筑科学—结构工程]