软弱地质高填方加宽路基地基沉降处理方案探讨

Discussion on Treatment Scheme for Settlement of Widening Subgrade Foundation with High Fill in Weak Geology

辽宁省盘锦地区是比较典型的软弱地质,利用原路路基加宽高填方路基对设计和施工的要求较高,原路路基经过多年的自然沉降和活载的施压已经基本稳定,新加宽部分和原路基部分势必会有不均匀沉降,如何最大程度消除不均匀沉降带来的路基开裂病害是设计和施工面临的难题。结合盘锦市西外环扩建工程施工过程中软弱地质高填方加宽路基施工过程中出现的路基病害问题,从设计及施工方面分析了产生病害的原因,有针对性地提出病害处理方案,最终达到了理想效果,可为类似工程提供参考。

Panjin area in Liaoning province is a typical weak geological area.The design and construction requirements for widening subgrade with high fill by using the original road subgrade are high.The original road subgrade has been basically stable after years of natural settlement and live load pressure.The new widened part and the original subgrade will inevitably have uneven settlement.How to eliminate the subgrade cracking disease caused by the uneven settlement to the greatest extent is the difficult problem for the design and construction.In combination with the subgrade disease problems occurred in the construction of the widening subgrade with high fill in weak geology during the construction of the west outer ring expansion project in Panjin,the causes of the disease are analyzed from the aspects of design and construction,and the treatment scheme for the disease is put forward pertinently,which can finally achieve the ideal effect and provide reference for similar projects.