【摘要】 利用非线性有限元方法计算了深基坑开挖引起的地表沉降量与地表沉降宽度。首次提出用三点弯曲模型模拟混凝土路面的断裂型式,并建立了路面沉降模型。通过试验研究表明,地表沉降对混凝土路面断裂的影响较大,当沉降宽度达到极限值时,将会引起路面裂纹扩展,导致路面断裂。将三点弯曲模型应用于混凝土路面实际工程断裂分析,计算结果与实际情况吻合较好。更多还原

【Abstract】 The ground sinking depth and width with the excavation of deep foundation pits are calculated by nonlinear FEM. Based on three-point-bending model, the crack of concrete road is simulated and the model of road sinking is established for the first time. The results of the experiment indicate that ground sinking has great influence on road crack. If the ground sinking width attains the maximum value, the road will be damaged. Using the three-point-bending model, the results are shown to be in good agreement with practical case.更多还原