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柔性基础下复合地基已广泛应用于公路和铁路路堤、水利土石坝、尾矿坝及各类堆场等工程领域,但其理论尚落后于工程实践。结合解析法研究现状分析,对所推导的柔性基础下复合地基沉降的简化解析解给予介绍,并通过工程实例对该解析解的可靠性进行验证。然后,基于该解析解和标准算例,对系统8个影响因素与等沉面高度、中性点位置、向上和向下的刺入变形及桩和土的沉降等内在联系作了分析。结果表明:系统8个因素对各沉降特性指标都有不程度的影响,必须重视对系统上、下部共同作用的深入研究。
The composite foundations under the flexible foundation have been widely used in engineering fields such as highway and railway embankments, hydraulic earth-rock dams, tailings dams and various yard areas, but their theories are still lagging behind engineering practice. Based on the analysis of the present situation of analytic method, the simplified analytic solution of composite foundation settlement based on the deduced flexible foundation is introduced, and the reliability of the analytical solution is verified through engineering examples. Then, based on the analytical solution and the standard examples, the influence of eight factors on the system is analyzed, such as the height of isoplankton, the location of neutral point, the upward and downward piercing deformation and the settlement of pile and soil. The results show that: the system of eight factors on the settlement characteristics of indicators have a degree of impact, we must pay attention to the system, the lower part of the in-depth study.