多年以来,我们单位在营业线上开始采用管涵顶进法,经过多年来施工实践,证明管涵顶进法在营业线上施工是较好的施工方法,深受广大群众欢迎。去年我们又在徐州枢纽孟家沟区段先后顶进管涵三处,质量良好地完成了任务。通过以上实践,有了一些体会,现介绍如下: 一.挖土顶进法的主要工序是挖土,这一环很重要,它是在管节顶进前端方向先挖土,然后靠 Over the years, our unit began to adopt pipe culvert jacking method in business lines. After many years of construction practice, it was proved that pipe culvert top-in method is a good construction method in business line and welcomed by the masses. Last year we again in the Xuzhou hub Mengjiagou section has culvert three culverts, completed the task in good quality. Through the above practice, with some experience, are presented as follows: First, the main process of excavation Top Method is to dig soil, this ring is very important, it is in the pipe heading to the front of the first excavation, and then rely on