临近运营铁路干线膨胀岩高路堑施工技术

随着我国铁路网的逐步完善,原修建的各条单线铁路实行客货分流,增加干线铁路网的运量,需对既有单线铁路实施增二线规划,在节约投资及减少占地的前提下,各新建二线铁路均与既有单线并行设计,这就使得在增建二线过程中,防护既有铁路单线运营安全显得尤为重要。由于原单线铁路均修建上世纪七八十年代,铁路两侧施工环境复杂,既有高路堑开挖防护施工就是其中之一。通过对临近既有运营铁路干线高路堑开挖防护施工工艺进行比选、研究、再创新,并付诸实施,总结出一套确保营业线运营安全的施工防护体系,取得了良好的社会效益。

Construction Technology of High Cutting in Expansive Rocks Close to Main Operating Railway Line

With the gradual improvement of China's railway network,the original single-track railways have been implemented to divert passengers and cargoes,increasing the traffic volume of the main-line railway network.It is necessary to implement an additional second-line plan for existing single-track railways to save investment and reduce land occupation.Under the premise,each new second-line railway is designed in parallel with the existing single-line,which makes it particularly important to protect the safety of the existing single-line operation during the construction of the second line.Since the original single-line railways were built in the 1970s and 1980s,the construction environment on both sides of the railways was complicated,and the existing high road cutting excavation protection construction was one of them.By comparing,researching,re-innovating and protecting the construction technology of excavation and protection of high cuttings adjacent to the existing main railway lines,and putting it into practice,a set of construction protection system to ensure the safety of the business line operation was summarized and good social benefits were achieved.