京能十堰电厂铁路路基下穿公路大桥方案研究

依托京能十堰电厂铁路专用线下穿公路桥工程,比选桥梁、路堤桩板墙和轻质泡沫土填筑方案.采用数值模拟和现场监测,分析桩板墙下穿对既有桥的影响;桩板墙设计采用地下圆形、地上方形的组合桩代替传统的人工挖孔桩,结构形式新颖可靠,适应性强,成功解决了邻近既有建筑物震动、地下水位高和软弱土层宜塌孔的难题.

Research on Schemes of Jingneng Shiyan Power Plant Railway Subgrade underpassing the Highway Bridge

Based on the project of Jingneng Shiyan power plant railway special line underpasses the highway bridge, it compares the schemes of bridge, embankment pile-slab wall and lightweight foam soil filling. Numerical simulation and field monitoring are used to analyze the influence of pile-slab wall on the existing bridges. The pile-slab wall design uses underground circular and aboveground square composite piles to replace the traditional manual hole digging pile, which the structure is novel andreliable with strong adaptability. It successfully solves the problems of vibration of adjacent existing buildings, high groundwater level and hole collapse in soft soil layer.