摘要
在总结矩形顶管工程特点的基础上,采用随机介质理论计算了矩形顶管施工引起的地表沉降,并与Peck法进行对比。结果表明:随着顶管埋深增大,Peck法计算结果与均匀收敛模式下随机介质理论计算结果趋于一致,与不均匀收敛模式计算结果始终存在一定差值。在埋深比较大的情况下,圆形和矩形顶管施工引起的地表沉降趋于一致。顶管宽高比和间隙比的增大都会使沉降槽形状趋于宽而浅。与实测值的对比表明,随机介质理论计算结果比Peck法计算结果更接近实际情况。
Based on summarizing characteristics of rectangular pipe-jacking projects, the stochastic medium theory was used to calculate surface settlement induced by rectangular pipe -jacking construction. The results were then compared with Peck Formula. With the increase of pipe depth, the re- sults of Peck Formula comes to according with that of stochastic medium theory under uniform conver- gence condition, while differs from that under non-uniform convergence condition. With high embedment ratio, surface settlement troughs of circular pipe-jacking and rectangular pipe - jacking reach unanimity. The shape of settlement trough turns to wide and shallow with the increase of width - height ratio or gap ratio. Compared with observed values, the results calculated by stochastic medium theory are closer to practical situation than that of Peck Formula.
出处
《公路工程》
北大核心
2017年第4期4-9,共6页
Highway Engineering
基金
中国工程院重点咨询项目(2015-XZ-16)
国家自然科学基金资助项目(51178420)
国家科技支撑计划项目(2012BAJ01B04-3)
关键词
矩形顶管
随机介质理论
收敛模式
PECK公式
rectangular pipe-jacking
stochastic medium theory
convergence mode
peck formula
