运营煤矿槽仓高低双排桩的边桩内力计算

Internal Force Calculation to Side Pile of High-Low Double-row-pile Composited Supporting Stucture with Coal Storage in Service

基于一类前排桩处于低位、后排桩处于高位的高低双排桩支护结构型式,建立了将桩视为弹性地基梁、桩底弹簧约束的力学模型,根据所建模型分段分析了挠曲线微分方程和内力方程。考虑槽仓运营状态下竖向承载力,建立力法方程并进行了边桩桩身截面内力求解。结合工程监测实例对某地运营煤矿槽仓高低双排桩的边桩进行了内力计算,与实测对比表明计算方法能满足工程设计,为类似支护结构提供了设计参数依据。

Based on high-low double-row-pile composited supporting stucture which front piles are higher than the back, the mechanical model is established to analyze the space curve differential equations and the equation of Internal forces by assuming that the pile is the elastic foundation-beam and the base pile bears the spring constraint. Considering the coal storage in service, equation of force method is established to solve internal force of section of the side pile. With the monitoring results of a coal storage,internal force of the side pile is calculated and compared with the monitoring results. The comparison shows that the method of calculation can well meet the needs of the engineering designs and can provide design reference for the similar supporting structure.