软土地基建筑稳定性模糊综合评价方法研究

软土地基具有高压缩比、低力学性能、较强塑性,不利于上部建筑工程稳定.施工前,对现状条件下建筑的稳定性进行预判,并根据评判结果提出相应的地基处理方案,对工程的安全实施很有必要.基于软基建筑稳定性受多种因素控制,具有一定的模糊性,提出采用模糊综合评价方法.首先通过技术和工程资料分析,建立了有8个主要影响因素组成的评价因子集合,并给出了合理的隶属度.然后运用层次分析方法得到了各因素的比较评判矩阵,并计算得到了权重集.在此基础上,建立了软基建筑稳定性分级与综合评价指数的对应关系集.最后,将方法运用到某软土建筑稳定性评价中,结果表明方法能够较好地适用于软土基地建筑稳定性评价,但需进一步就隶属度、权重、评价集等集合的建立进行完善.

Research on Fuzzy Comprehensive Assessment Method to Stability of Soft Soil Foundation Construction

Soft soil foundation is with high compression ratio,low mechanical properties,strong plasticity and is adverse to stabihty of the structure upon it.Before construction,it is necessary to pre-adjust stability of the structure and propose the foundation process scheme.The stabihty of the structure upon soft soil foundation is affected by multiple factors,and has a certain ambiguity,so this article proposes fuzzy comprehensive assessment method.Firstly,it sets up the assessment set including 8 factors and gives the respective membership degree.Then,it uses the AHP method to get the comparative evaluation matrix of the 8 factors and the weight set.On this base,it sets up the corresponding set between structure's stabihty degree and comprehensive assessment index.Finally,the method is used to the assessment of the soft soil based structure,and the result shows that this method fits the assessment of stabihty to soft soil based structure,but it needs to further improve the methods of setting up the membership degree set,weight degree set,assessment set and etc.