摘要
通过FLAC3D对现场工况进行了开挖模拟,与实测结果进行了对比分析。围护结构型式采用单排桩+锚索和双排桩,开挖到坑底时,计算的桩身水平位移最大值分别为8.73 mm和10.19 mm,实测值分别为10.57 mm和12.05 mm,实测值稍大于计算值,桩身整体侧向变形规律一致。围护结构型式采用单排桩+锚索,不同开挖阶段坑外地表沉降的计算值与实测值对比,整体沉降均随着开挖深度增加而增大;沿基坑方向的分布规律也大致相同,都是呈凹槽型分布,最大沉降值出现在距桩后3~4 m范围内。
Simulating the excavation working conditions on site with FLAC3 D,a comparison of numerical results with measured results has been made. Palisade structure using single pile ＋ three anchor cables and double row piles,the excavation to the pit,the calculation of the maximum horizontal displacement of pile is 8. 73 mm and 10. 19 mm respectively,the measured value is 10. 57 mm and 12. 05 mm,measured value is slightly greater than the calculated value,lateral deformation law of piles is the same. Palisade structure using single pile ＋ three anchor cable,comparing the calculated value and the measured value in different stages of the excavation outside the pit,the surface subsidence as a whole settlement as the excavation depth increases,the direction of the foundation pit distribution is roughly same,also is the groove type distribution,maximum subsidence occurred in pile after 3 m to 4 m.
出处
《广东公路交通》
2017年第5期32-38,共7页
Guangdong Highway Communications
基金
国家自然科学基金资助项目(51478484
51678571)
中建五局土木工程有限公司立项项目(02012016YN77
020116D0003009)
关键词
泥炭土
深基坑
FLAC3D数值模拟
peat soil
deep foundation pit
FLAC3D numerical simulation
作者简介
通讯作者：杨果林（1963-）,男,教授,博士生导师,从事道路与铁道工程、岩土工程和结构工程教学与科研工作,E-mail：Yangguolin6301@163.com.
