桂林市压实混合土填料承载力研究

Research on the Bearing Capacity of Compacted Mixed Soil Filling in Guilin City

桂林地区的混合土以其独特的地区特征、复杂的工程力学性质而引起许多学者的注意,而压实混合土作为地基填料的工程借鉴经验极为缺少。结合桂林市三个工程实例,利用浅平板静力载荷试验分别对三个不同地基的承载力进行计算,研究表明:在没测到极限承载力的情况下,可利用麦随基威克司法与双曲线法,通过多试验点求平均值的方法进行外推,得到的极限承载力与常规选择安全系数方法相近;对比分析三种地基的承载力,混合土填料经碾压后压实效果明显,承载力高,在作为良好的土方填筑材料时,具有一定的工程经验和经济效应。

The mixed soil in the area of Guilin has attracted the attention of many scholars due to its unique regional characteristics and complex engineering mechanical properties,while the engineering reference experience of compacted mixed soil as foundation filler is extremely lacking.Based on three engineering examples in Guilin City,the bearing capacity of three different foundations was calculated using shallow plate static load tests.The study has showed that,in the absence of measured ultimate bearing capacity,the Maxwell method and hyperbolic method can be used to extrapolate the ultimate bearing capacity by averaging multiple test points.The obtained ultimate bearing capacity is similar to the conventional method of selecting safety factors;comparing and analyzing the bearing capacity of three types of foundations,it is found that the mixed soil filling material has a significant compaction effect after rolling and a high bearing capacity.When used as a good soil filling material,it has certain engineering experience and economic effects.