京哈高速公路绥中至沈阳段改扩建风积沙路基削坡方案研究

Research on Scaling Scheme for Aeolian Sand Subgrade of Reconstruction and Expansion Section of Suizhong to Shenyang of Jingha Expressway

京哈高速公路绥中至沈阳段有长约99km利用风积沙填筑的路基,在加宽改造施工过程中如何保证风积沙路基的稳定,将关系到绥沈高速公路保通期的运营安全,关系到改扩建的施工质量和工程造价,直接影响设计和施工方案,是各方面关注的重点。对风积沙路基削坡后路基的稳定、包边土的处理、挖台阶的型式等进行了研究,供设计阶段参考。

There is a subgrade of about 99kin long which utilizes aeolian sand filling Shenyang of Jingha Expressway. The guarantee of stability of aeolian sand subgrad at section of Suizhong to e during the widening reconstruction construction process will influence the operation safety of smoothness guarantee period of Suishen Expressway, construction quality and project cost of reconstruction and expansion as well as design and construction scheme, which are key points of all aspects. The stability of subgrade after scaling of aeolian sand subgrade, treatment of surrounding soil, and type of step excavation are researched, providing reference for design stage.