摘要
兰州市一12层住宅楼坐落在厚约40 m的杂填土场地上,地基基础不均匀沉降导致楼体严重倾斜。在分析其倾斜原因的基础上,对复杂深厚填土地区建筑物的纠偏加固措施及控制技术进行了研究。采用桩周应力释放+截桩迫降的综合纠偏方法,并制定科学合理的施工工序,使得大楼最终倾斜率由13.76‰回归到2.8‰,满足规范要求。提出了截桩迫降的基本原理及理论计算公式,该工程填补了国内在深厚杂填土回填场地(包括填土、饱和填土、回填块石层等)上高层建筑纠偏的空白。
A 12-story residential building is located in the complex and about 40 m deep filling area in Lanzhou city.A series of uneven settlement caused it serious inclining.On the basis of cause analysis,the deviation-rectifying and strengthening technologies in filling areas were studied.A comprehensive deviation-rectifying method of stress release around pile and forced settlement by pile cutting was taken. Through scientific and reasonable construction procedures,the final building inclination rate returned from 13. 76‰ to 2. 8‰,and meets the requirements of relevant national codes. The basic principle of forced settlement by pile cutting was expounded and its theoretical calculation formula was put forward.This practice filled in the blank of deviation-rectifying of high-rise building in deep miscellaneous filled soil including filled soil, saturated filled soil,backfill stone layer, etc.
作者
孔德刚
张世径
赵成江
柳勇
张小兵
KONG Degang;ZHANG Shijing;ZHAO Chengjiang;LIU Yong;ZHANG Xiaobing(l.China Railway Academy Co.Ltd.,Chengdu Siehuan 611730,China;Northwest Research Institute Co.Ltd.of China Railway Engineering Corporation,Lanzhou Gansu 730000,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou Gansu 730050,China)
出处
《铁道建筑》
北大核心
2018年第9期88-93,共6页
Railway Engineering
关键词
深厚填土地基
组合纠偏法
现场试验
既有建筑纠偏
桩周应力释放
截桩迫降
Deep filling foundation
Combined correction method
Field test
Existing building deviation-rectifying
Stress release around pile
Forced settlement by pile cutting
