对凹折式挡土墙设计推力的探讨  

Discussion on Design Thrust of Concave-Fold Retaining Wall

作　　者：王家豪 高阳[2] 汪学清[1] 胡明明[2] 赵阳[3] WANG Jiahao;GAO Yang;WANG Xueqing;HU Mingming;ZHAO Yang(School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Institute of Rock and Soil Mechanics,Chinese Academy of Science,Wuhan,Hubei 430071,China;School of Environmental and Municipal Engineering,North China University of Water Resources and Electric Power,Zhengzhou,Henan 450011,China)

机构地区：[1]中国矿业大学(北京)力学与建筑工程学院,北京100083 [2]中国科学院武汉岩土力学研究所,湖北武汉430071 [3]华北水利水电大学资源与环境学院,河南郑州450011

出　　处：《矿业研究与开发》2024年第2期157-163,共7页Mining Research and Development

基　　金：国家自然科学基金项目(41941018,52009128)。

摘　　要：挡土墙是整治矿山渣坡的主要措施之一,重力式挡土墙凭借其就地取材、施工方便、经济效果好的优点得到了广泛应用。重力式挡土墙样式繁多,但对于某些高度大于20 m的挡土墙,常规形式无法满足承载力和稳定性要求,实际工程中往往采用凹折式挡土墙。通过分析凹折式挡土墙的形状类型,对凹折式挡土墙墙后土体进行分块,根据块体的应力分析,推导得出凹折式挡土墙滑坡推力和主动土压力的计算公式,并将其应用于某锰渣填埋场2#渣坝。结果表明,天然工况、暴雨工况和地震工况下凹折式挡土墙的主动土压力数值远大于滑坡推力数值,3种工况下计算公式得到的抗滑移稳定安全系数均大于规范要求的抗滑移稳定安全系数,表明计算公式能很好地应用于凹折式挡土墙,也可以推广应用于墙背为弧形的特殊挡土墙。Retaining wall is one of the main measures to renovate mine slag slope.Gravity retaining wall has been widely used because of its advantages of local materials,convenient construction and good economic effect.There are many types of gravity retaining walls,but for some retaining walls with a height of more than 20 m,the conventional type cannot meet the requirements of bearing capacity and stability,and the concave-fold retaining wall is often used in practical projects.By analyzing the shape of the concave-fold retaining wall,the soil behind the concave-fold retaining wall was divided into blocks.According to the stress analysis of the blocks,the calculation formula of the landslide thrust and active earth pressure of the concave-fold retaining wall was derived,and it was applied to a manganese slag landfill site 2~#slag dam.The results show that the active earth pressure value of the concave-fold retaining wall under natural conditions,rainstorm conditions and earthquake conditions is much larger than the landslide thrust value.The anti-slip stability safety factors obtained by the calculation formula under three working conditions are greater than the anti-slip stability safety factor required by the specification.It shows that the calculation formula can be well applied to the concave-folded retaining wall,and can also be applied to the special retaining wall with curved wall back.

关 键 词：凹折式挡土墙 滑坡推力 主动土压力 抗滑移稳定安全系数 

分 类 号：TD228[矿业工程—矿井建设]