【摘要】 在目前众多预测地铁隧道开挖引起地表位移的经验方法中,Peck提出的高斯方程是最简便,也是应用最为广泛的方法。由于这一公式的提出是基于有限地区的实测资料,在应用前应先进行基于当地实测资料的验证工作。根据长沙市地铁开挖的实际观测数据,采用回归分析法引入两个修正系数,即地表最大沉降修正系数和沉降槽宽度修正系数,对Peck公式进行了修正,得出了适用于长沙地区的Peck公式。工程实践表明,修正的Peck公式对长沙地区隧道施工地表沉降预测具有工程指导意义。更多还原

【Abstract】 Gaussian equation suggested by Professor Peck is one of the simplest and most popular-used methods to predict the soft ground movement induced by shallow tunneling work. The application of this method in China should be carefully verified and evaluated since it was suggested based on actual measurements of limited areas.This paper improves the Peck formula and develops an applicable Peck formula for Changsha by focusing on the observed data of Shield Equipment & Project,introducing two correction coefficients by using the regression analysis method: the correction coefficient of the maximum surface subsidence and the correction coefficient of the subsidence groove width. Engineering practices show that the modified Peck formula has an engineering guidance significance to the surface subsidence prediction of the tunnel construction in Changsha.更多还原