The differences between calculated and measured values of displacement field are dynamically modified by a load transfer method. And the Duncan Zhang's 3 D nonlinear finite element program is worked out by using the middle increment method. 对开挖过程中实测与计算的位移场差值,采用荷载转移法对其进行动态修正,并采用中点增量法,编制了邓肯-张大型三维非线性有限元程序。