摘要
坑内土体加固是控制基坑围护结构侧向位移的一项非常有效措施.采用弹性地基梁有限元模型,分析了坑内土体加固对围护结构变形和内力的影响.结果表明:围护结构的位移随加固深度的增大而减小,且存在着临界加固深度;在坑底以下加固能更好地控制围护结构的侧向位移.因此,合理地确定加固深度及空间位置既能保证基坑安全,又能够节省工程造价.
Engineering practice shows that improvement of bottom soil in foundation pits is very effective in lateral deformation control for retaining structure. Adopting finite element model of elastic bar system based on the theory of elastic foundation beam,the effect of improvement soil on lateral deformation and in ternal force of the retaining structure is studied. The results show that lateral deformation reduces with the increase of depth of improvement soil,and it is better to control lateral deformation of retaining wall of improvement soil under bottom of foundation pits. To save the engineering cost and guarantee the pit safety, it is important to decide the depth and space location of improvement soil.
出处
《兰州交通大学学报》
CAS
2008年第1期28-31,共4页
Journal of Lanzhou Jiaotong University
基金
中铁七局集团有限公司科技研究项目(50525)
关键词
土体加固
围护结构
变形和内力
地铁车站
深基坑
improvement soil
retaining structure
deformation and internal force
metro station
deep foundation pit
