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结合四川盆地北部地区特殊地质条件和软土物理力学性质,针对新建巴中～南部高速公路实际工程中不同的软基类型,运用地基沉降、深层水平位移及路堤工后沉降等监测手段对塑料排水板和碎石桩两种软土地基处理方法的效果进行对比分析,确定两种软基处理方法对地基沉降和水平位移的影响规律。监测结果表明,塑料排水板处理软土地基,软土排水能力强,软土固结较快;碎石桩处理软土地基能有效控制地基深层水平位移值的进一步扩大。结合研究成果,提出了针对软土地基层厚度和路基填筑高度合理选择软基处理措施的办法,为软基处理设计与施工提供技术参考。
According to the special geological conditions and the physical and mechanical properties of soft soil in the northern part of Sichuan Basin, according to the different soft foundation types in the actual project of Bazhong ~ Southern Expressway, by using the monitoring methods of foundation settlement, deep horizontal displacement and embankment post-construction settlement, Plate and gravel pile two kinds of soft soil foundation treatment methods to compare the effect of the two soft foundation treatment methods on the settlement and horizontal displacement of the law. The monitoring results show that plastic drainage board can deal with soft soil foundation with strong drainage capacity of soft soil and quick consolidation of soft soil. The gravel pile handling soft ground can effectively control the further horizontal displacement of deep foundation. Combined with the research results, the methods of soft foundation treatment for soft ground basement height and subgrade filling height are proposed, which provide technical reference for the design and construction of soft foundation treatment.