基于模糊多属性决策法的软基加固效果评价

Reinforcing effect assessment of soft foundation based on fuzzy multi-attribute decision method

基于模糊多属性决策法建立了真空联合堆载预压法加固软土地基效果评价模型。选择总沉降、固结度、抗剪强度和侧向位移等4种监测变量作为加固效果评价的影响因素,采用模糊多属性决策方法,对软基加固效果的指标值和权值进行分析计算,确定出其效果评价的模糊指标值和模糊权值,并通过差异度分析和模糊效用值分析与常规堆载预压法进行对比,研究二者的加固效果随时间的变化关系。通过真空联合堆载预压法在广东西部沿海高速公路台山段路基加固工程中的应用,有效地论证了的该法的优势。

Aiming at reinforcing effect assessment of soft foundation with Vacuum and surcharge preloading method （VSPM）, a new quantitative assessment model is proposed, based on fuzzy multi-attribute decision method. Four kinds of monitoring parameters are selected as assessment factors, that is total settlement, consolidation degree, shearing strength and lateral displacement. Fuzzy multi-attribute decision method （FMDM） is adopted to analyze the index and weight of reinforcement effect, which provide the fuzzy index and fuzzy weight. Compared with the general preloading method by the fuzzy effective value and discrepancy analysis, the construction time of 2, 6 and 12 months is selected as the time nodes to investigate the change of reinforcement effect with time of the two methods Applying research results to the foundation treatment project at Taishan section of west coast freeway in Guangdong Province, the advantages of vacuum and surcharge preloading method （VSPM） is demonstrated effectively.