湘江大道改造工程营盘路节点对既有湘江隧道影响研究

Analysis of Effects on the Existing Tunnels During the Construction of Yingpan Road Node of Xiangjiang Road Speediness Renovation Project

湘江大道快捷化改造工程位于长沙市核心城区湘江东岸.研究营盘路节点对既有湘江隧道的影响对于确保工程顺利进行和今后运营安全十分重要.采用数值模拟的方法,根据基坑与隧道的不同相互位置关系,计算了不同工况下的土体主应力、衬砌位移和衬砌弯矩,分析了既有隧道主线及C、D匝道的结构响应特征.最后结合数值分析结果与工程实践经验,对工程提出了建议性处理措施.

Xiangjiang Road speediness renovation project is located in the east coast of Xiangjiang River,which is in the center of Changsha.For the successful project construction and future operation,it is vital to study the adverse effects on adjacent existing tunnels with the construction of Yingpan Road node.Based on the numerical simulation method and according to the different relative locations between tunnel and excavation,the soil principal stresses,tunnel displacements and bending moments of different conditions are calculated.The structural responses of adjacent existing tunnels and C,D ramps are analyzed. In theend,combining the numerical analysis results and engineering practice experience,the corresponding construction advices are put forward to provide guide.