The amount and cost of concrete account for an important proportion in the quantity and cost of tunnel project and are the key points of cost control.The current budget quota applicable to conventional tunnels cannot entirely consider the overconsumption of concrete in high ground stress and large deformation tunnels.Based on the statistical analysis of the typical sections with excessive large deformation of Yulong Xueshan tunnel on Lixiang Railway,deriving the average overconsumption rate of shotcrete and the average rebound rate of lining concrete,as well as the difference between single-layer and double-layer support in terms of rebound rate of shotcrete and backfill rate of lining concrete.The conclusions obtained have certain reference significance to the budgeting and construction cost control of high stress and large deformation tunnels of single track railroads.
关键词
大变形隧道/混凝土超耗/喷射混凝土回弹率/喷射混凝土回填率
Key words
large deformation tunnel/overconsumption of concrete/rebound rate of sprayed concrete/backfill rate of sprayed concrete
维普
万方数据