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一、工程情况中日友好医院内部道路,绝大部分在当年回填的建筑物基坑和管线废槽上修筑。地下管线错综复杂,施工场地狭窄而且管线回填土大部分在冬季完成,道路完成后须立即通车放行。为加强道路底层的整体性,原想采用厂拌石灰、粉煤灰、砂砾混合料代替天然级配砂砾。由于拌合料场供应量有限,而现场拌合又受场地和机械条件限制,为此参照厂拌料的配比,在中日医院道路工程中试用了“生石灰粉与粉煤灰稳定天然级配砂砾”代替天然级配砂砾底层。
First, the project situation Sino-Japanese friendly hospitals within the road, most of the backfill of the building pit and pipeline waste trench construction. The underground pipeline is intricate, the construction site is narrow and most of the pipeline backfill is completed in winter. After the completion of the road, it must be opened to traffic immediately. In order to strengthen the integrity of the road bottom, originally wanted to use factory mixed lime, fly ash, grit mixture instead of graded natural grading. Due to the limited supply of mixing yard, and site mixing and site conditions and mechanical constraints, this reference to the ratio of plant materials, road test in the Sino-Japanese hospital trial of “lime and fly ash stabilized natural grade With gravel ”instead of graded natural gravel bottom.