土工格栅加筋土挡墙稳定性影响因素敏感性分析

以灰关联分析法为手段,通过有限元强度折减法计算加筋土挡墙的稳定安全系数。结合水富—麻柳湾高速公路的土工格栅加筋土挡墙实际工程,分析了各因素对土工格栅加筋土挡墙稳定影响的敏感性,按大小依次为：内摩擦角、筋土间摩擦系数、粘聚力、筋带长度、筋带轴向拉伸刚度、筋带间距和填土密度。建议设计中,如果条件许可应优先选择摩擦角和粘聚力较高的填料,当填料受限制时,要提高加筋土挡墙的稳定性可以优先考虑选择与填土有较高摩擦系数和轴向拉伸刚度较大的土工格栅进行设计。

The Sensibility Analysis of Influencing Factors of the Paddle Slope Stability

The gray correlation analysis methodis taken to calculatestability safety factor of the reinforced soilretaining wall through the finite element strength reduction.Combining the geogrid reinforced soil retaining wallof Shuifu—Maliuwan expressway practical engineering,the paper analyzesvarious factors on the stability of geogrid reinforced soil retaining wall which affectsthe sensitivity,as follows： internal friction angle,soil friction coefficient,cohesion,reinforcement length,theaxial tensile strength of reinforced,reinforcement spacingand the filling density.In the design,if conditions permit,the fill with high friction angle and cohesion should be preference,when the fill isrestricted,to improve the stability of reinforced earth retaining wall,a higher coefficient of friction and axial tensile strength geogrid should be given priority choice todesign.