论文部分内容阅读
为了解决华北平原地区高速公路采用低路堤时所面临的下穿道路排水问题,结合河北省大广高速公路衡大段实体工程,针对华北平原地区地下水位低、地层土壤渗透性好、雨量小且集中、饮用水井深的特征,对典型土质进行了渗透试验,研究了集水净化渗滤系统排水的设计;根据不同区域的实际情况,分别提出了集水井加横向排水管加渗透池、集水井加横向排水管加封底的沉淀池加小渗井、集水井加横向排水管加不封底的渗透池加小渗井3种设计方案,并将这3种排水净化渗滤方案实施于实体工程。结果表明:集水净化渗滤系统排水方案一方面可解决低路堤设计理念下高速公路下穿道路的排水问题,另一方面可使路基平均填土高度降低1.5 m左右,节省了造价,减少了对生态环境的影响。
In order to solve the drainage problem of underpassing road when using low embankments in the North China Plain and combining with the large-scale entity of Hengda section of Hebei-Daguang Expressway, this paper aims at the low groundwater level in North China Plain, the good permeability of formation soil, Concentration and the depth of drinking water. The permeability of the typical soil was tested and the drainage design of water purification and percolation system was studied. According to the actual situation in different regions, the water collection wells with horizontal drainage pipes and permeation tanks, water collection wells Plus horizontal drains plus the end of the sedimentation tank with a small seepage wells, water wells plus horizontal drains and impermeable infiltration tank with a small seepage wells 3 kinds of design options, and these three kinds of drainage purification and percolation program implemented in physical engineering. The results show that the drainage scheme of water purification and percolation system can not only solve the drainage problem of the underpass highway under low embankment design concept but also reduce the average embankment height by about 1.5 m, save the cost and reduce the cost Impact on the ecological environment.