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针对真空-堆载联合预压法各设计参数敏感性分析研究的不足,应用Biot固结理论及ABAQUS软件,建立了真空-堆载联合预压分析模型.选取某实际公路试验段进行了真空值大小,塑料排水板打设深度、打设间距、透水性等设计参数的敏感性分析,研究了软土地基在经过真空-堆载联合预压处理后的加固效果及变形位移随各设计参数的变化规律,给出了各种设计参数对加固效果的影响程度.基于设计参数的敏感性分析,提出了各种加快软土固结沉降速率以及尽量减少工程对周围环境影响等的工程措施.研究成果可为真空-堆载联合预压法处理软土地基的设计提供参考依据.
Aiming at the shortcomings of the research on the sensitivity of the design parameters of the vacuum preloading, the Biot consolidation theory and the ABAQUS software were used to establish the vacuum preloading analysis model.Selecting an actual highway test section, the vacuum value Size, plastic drainage board set depth, spacing, water permeability and other design parameters of the sensitivity analysis of the soft soil foundation after vacuum - pile preload consolidation treatment effect and deformation displacement with the design parameters The influence of various design parameters on the reinforcement effect is given.According to the sensitivity analysis of the design parameters, various engineering measures are put forward to speed up consolidation settlement rate of the soft soil and minimize the impact of the project on the surrounding environment. The results can provide references for the design of soft soil foundation by vacuum-surcharge combined preloading method.