浅谈平原地区下穿道路路面结构与排水系统设计

科尔沁平原微丘地区,其土质大部分为粉土,因路基填筑材料较差、道路结构与排水设计不合理,造成了许多已建的公铁立交下穿道路在远未达到设计使用年限就出现了不同程度的破坏,相继出现了唧泥、裂缝断裂、错台、管涌等病害,严重影响了下穿公路的使用,也影响了人们的出行和交通运输安全。基于上述原因,通过对下穿道路损坏机理的调查与分析,结合国内外道路结构和排水设计的研究经验,提出了下穿道路结构与路基排水的设计改进方案,经工程应用,效果良好,具有应用推广价值。

Elementary Discussion on Design of Pavement Structure and Drainage System of Underpass Road in Plain Region

Horqin is a plain hilly area,where the most of soil is the silty soil.Owing to the poorer roadbed construction material,the design of road structure and drainage is unreasonable to cause many underpass roads of highway and railway grade separation damaged to the different extents within the design service life,i.e.mud pumping,fracture,faulted slabs,wrong units,piping and other faults,which seriously affect the use of underpass highway,and also affect the people’s travel and transportation security.For these reasons,according to the investigation and analysis of damage mechanism of underpass road,and combined with the studying experience of road structure and drainage design at home and abroad,the article puts forward the design improvement scheme of underpass road structure and roadbed drainage.Its effect is good after the engineering application,and it is worthy to popularize for application.