Abstract
The existing roads, railways can no longer meet the growing expansion of the traffic needs, some newly built roads, railways must be crossed with the old lines, the difficulty of construction is considerable, especially Pro tight both line and rock blasting operations, it is necessary to consider boththe safety of the line, but also to ensure that the construction schedule. Based on an example of the rebuilding of the railway grade crossing to interchange from Loudi Prefecture in Zhuliu highway to dragon section of the sand Huaihua, Hunan Province, the article describes the safety and protection measures construction blasting in conditions close to the complexity of the existing lines, the construction of similar projects the organization, management provide some reference.
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