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腐木淤泥混合土是在广东省揭普高速公路修建过程中所发现的一种特殊软土,具有高含水率、高压缩性、低渗透性等特点。通过固结压缩试验、回弹试验、流变试验等室内试验,分析了腐木淤泥混合土的压缩、回弹及次固结变形特性,整理出腐木淤泥混合土的物理性质指标及压缩指标。同时结合工程实例得出,小间距袋装砂井+超载预压是处理腐木淤泥混合土地基的有效手段。研究结论可为以后的类似地基处理设计与施工提供重要依据。
Rotten wood mud mixed soil is a special soft soil discovered during the construction of Jiepu Expressway in Guangdong Province. It has the characteristics of high water content, high compressibility and low permeability. Through compression test, rebound test and rheological test, the compression, rebound and secondary consolidation deformation characteristics of the mixed wood with humus wood were analyzed. The physical properties indexes and compressive indexes . At the same time, with the engineering example, we can conclude that the small spacing bagged sand well + overload preloading is an effective method to deal with the foundation of the rotten silt mixed soil. The conclusion of the study can provide an important basis for the design and construction of similar ground treatment in the future.