砂性土体区下穿立交防水设计要点及渗水整治措施

Waterproofing Designing Key Points and Leakage Treatment for Underpass Interchange in Sandy Soil Area

长三角地区城市路网发达,受道路纵断面线型控制,与铁路立体交叉的道路多采用下穿立交工程;砂性土地段尤其是高地下水位区域,做好下穿立交桥防水及渗漏处理是设计施工需考虑的重点。本文结合宁启铁路沿线下穿立交防水设计及渗水处理方案,介绍了结构自防水、结构外防水等设计要点以及新型渗漏封堵措施,对下穿立交箱体沉降缝进行整治,取得良好的效果。

In Yangtze River delta area, the urban road net is quite developed, the roads across railways mostly adopt underpass interchange due to the road profile linear limitations. Waterproofing and leakage treatments should be attached great importance during the design and construction of underpass interchange in sandy soil section, especially the area with high underground water level. Combining the underpass interchange along Nanjing-Qidong railway, the article introduces the designing key points of structure self-waterproofing, waterproofing outside the structure and new leakage treatments as well. These treatments for settlement ioints of underpass interchange received good effects.