第四部分:盾构施工1 单一盾构隧道掘进施工,土体沉降分析 实测结果及其回归曲线与预测计算的比较,如图4—1和4—2所示,预测值系将土体介质按随机理论方法计算。图4—1,4—2中: (1)作业面前后方的地表纵向沉降实测值及其拟合曲线(图4—1) (2)地表纵向沉降实测值与预测计算值的比较(图4—2) Part IV: Shield Construction 1 Single shield tunneling construction, soil settlement analysis of the measured results and regression curves and comparison of predictive calculations, as shown in Figure 4-1 and 4-2, the predictive value of soil media Calculated by random theory method. Figure 4-1 and 4-2: (1) Measured values ​​and their fitted curves of vertical and horizontal ground settlement before and after operation (Figure 4-1) (2) Comparison between measured and predicted values ​​of longitudinal settlement -2)