特大型桥梁变形监测网的优化设计

Optimum Design of Deformation Mornitoring Network for Big Bridge

本文对特大型桥梁变形监测网的布网方案和优化设计作了论证。提出一级网由基准线上少数点构成直伸型边角网,二级网由一级点之间的变形点构成,并用视准线小角法测定。通过京广黄河双线铁路大桥变形观测实践,证明上述设计思想和优化方案是行之有效的。

Optimum design of network configuration for big bridge deformation mornitoring is evaluated, based on that the first order network is composed of a few points on the bench mark to form straight-stretch triangulation, and the second order network set by the deformed points on the first one, and determined by collimation line method. This approach has been provcd very efficiency in the Yellow River bridge project of Beijing-Guangzhou railway.