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。
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.
出处
《工程力学》
EI
CSCD
北大核心
2004年第3期40-43,共4页
Engineering Mechanics
基金
湖南省自然科学基金资助(00JJY2055)
关键词
基坑开挖
三点弯曲
断裂分析
混凝土路面
地表沉降
excavation of foundation pit
three-point-bending
crack analysis
concrete road
ground sinking
