论文部分内容阅读
特大桥岸坡稳定性问题是控制特大桥建设的关键因素之一。本文结合江凯河特大桥三穗岸的工程实例,查明桥区的工程地质条件;建立稳定性计算模型,采用刚体极限平衡法计算各种工况下岸坡的稳定性;基于离散元(UDEC),建立数值模拟模型,模拟各种工况下岸坡岩体的位移及张开裂的分布。结果表明:拱座底标高位于689.88m时,全部工况的稳定性系数皆达到安全控制标准,且岩体变形均为mm级,适宜桥梁建设。
The stability of the bridge slope is one of the key factors to control the construction of the bridge. Based on the engineering example of the three banks of Jiang Kaihe Super Large Bridge, the engineering geological conditions of the bridge area are identified. The stability calculation model is established and the stability of bank slope under various working conditions is calculated by rigid body limit equilibrium method. UDEC) to establish a numerical simulation model to simulate the displacement and crack distribution of rock mass in bank under various conditions. The results show that when the base height of abutment is at 689.88m, the stability coefficients of all working conditions all reach the safety control standard, and the deformation of the rock mass is in the order of mm, which is suitable for bridge construction.