一、混凝土梁道碴槽宽度存在的问题 据调查,目前多数圬工梁桥面道碴散溢到两侧人行道板上,或道碴落于桥下,道碴肩宽严重不足(特别是预应力梁跨中道床不足,两端道碴散溢),桥上线路稳定受到威胁。说明道碴 First, the concrete beam ballast tank width problems According to the survey, at present, most of the girder bridge deck ballast scattered to both sides of the sidewalk board, or ballast falls under the bridge, ballast shoulder width is not enough (especially the pre Stress beam across the middle of the bed is not enough, both ends of ballast scattered), the line stability of the bridge under threat. Explain ballast