城市道路短路桥过渡段路基路面设计与应用研究

Research on the Design and Application of Subgrade Pavement in the Transition Section of Short Bridge of Urban Road

针对徐州睢宁县汇金路建设工程春水河桥西桥头路桥过渡段过短,无法应用当地典型台背回填方案的问题,提出填砂法、泡沫轻质土法两种台背回填方案,并进行优缺点分析与方案比选。在综合考虑建设工程质量、路基强度、运营期桥头稳定性和运行舒适性的情况下,确定采用泡沫轻质土法。给出泡沫轻质土法方案设计要点,并进行抗浮稳定性验算,提出在做好桥头路基过渡的同时,应做好路面结构的刚柔过渡,才能更好地解决桥头跳车问题。

In view of the problem that the transition section of the road bridge in the west bridgehead over Chunshui river of the construction project of Huijin road in Suining county of Xuzhou is too short and the scheme for the local typical abutment backfill cannot be applied,two kinds of schemes for the abutment backfill with sand filling method and foam light soil method are put forward,and the advantages and disadvantages of the schemes are analyzed and compared.In the case of comprehensive consideration of the construction project quality,the subgrade strength,the bridgehead stability and the operation comfort during the operation period,the foam light soil method is determined.The key points of the design of the foam light soil method are given,and the checking calculation on the anti-floating stability is carried out,and it is proposed that the rigid and flexible transition of the pavement structure should be done while doing a good job in the transition of the bridgehead subgrade,so as to better solve the problem of bump at the bridgehead.