拼宽道路的路线、等级、结构形式受原道路制约较大,工程建设环境受原道路通行影响严重。工程施工工艺、施工方法也是以道路拼宽为基础进行。拼宽道路的设计、投标、施工中涉及了许多新建道路中没有的内容。如交通组织、交通安全、道路拆除等。各单位对新建道路的设计、施工、管理较为熟悉;而目前国内拼宽道路较少,其中有许多建设内容与新建道路有所区别。因此,拼宽道路与新建道路在工程施工中存在着较多差异。 The route, grade and structure of widening roads are greatly restricted by the original roads and the construction environment of the project is seriously affected by the original road access. Construction process, construction method is based on the road spell widening. Patchwork wide road design, bidding, construction involves many new roads do not have. Such as traffic organization, traffic safety, road demolition and so on. All units are more familiar with the design, construction and management of new roads; at present, there are fewer roads in the country, many of which are different from those of new roads. Therefore, there are more differences in the road construction and new road construction.