特殊地质情况下D型便梁加固线路的工艺研究

在铁路既有线路框构桥及管涵顶进时,常采用D型便梁进行铁路线路加固,使线路轨道结构在施工过程中保持正常的几何形状和位置,保证既有铁路的正常运营,从而广泛应用于既有铁路线路的建设中。特殊地质条件下,如地下水位较高时,无法采用人工挖孔支护桩施工,则D型便梁往往无法实施。因此,为了保证施工期间铁路运营的安全,采用新型的支撑方案便成为加固线路的关键步骤。

D-type temporary beam is used for railway roadbed settlement when the frame bridge and pipe culvert along the operating railway line are jacked in,so that the track structure of the line can maintain the normal geometric shape and position in the construction process,which ensures the normal operation of the existing railway line,thus widely used in the construction of the existing railway line.If there is a special geological condition with high groundwater level,and it is impossible to use manual hole digging for supporting the pile construction,the D-type temporary beam often cannot be implemented.Therefore,in order to ensure the safety of railway operation during construction,the new implementation of supporting pile becomes a key factor to realize railway roadbed settlement.