水泥混凝土复合垫层结构取承载力按250KPa,扩散角25度。1.垫层承载力验算基底平均压力pk: 112.0(kPa)基底最大压力pkmax: 150.0(kPa)基底自重压力pc: 9.0(kPa)垫层承载力特征值fz: 256.8(kPa)pk<=fz,满足!pkmax<=1.2*fz,满足!因此换土垫层承载力满足要求!2.换填垫层底面处承载力验算垫层应力扩散角瑁 ?20.0(度)垫层底附加应力pz:?98.0(kPa)垫层底自重应力pcz:?36.0(kPa)垫层底pz+pcz:?134.0(kPa)垫层底地基土承载力特征值fz:?137.3(kPa)pz+pcz<=fz,垫层底面地基土的承载力满足要求!3.垫层尺寸验算按构造要求验算垫层顶面宽度:基础底面宽度B: 42.500(m)垫层顶面宽度B1: 49.500(m)(B1-B)/2>=300mm,满足构造要求:垫层顶面宽度超出基础底边宽度不小于300mm!按应力扩散角验算垫层底面宽度:垫层底面宽度B2: 57.500(m)基底压力传递到垫层底的分布宽度B+2ztg瑁 44.684(m)B2>=B+2ztg ,垫层底面宽度满足要求!4.下卧层承载力验算土层号深度 pzpczpz+pczfz是否满足(m)(度)(kPa)(kPa)(kPa)(kPa)35.200.098.046.8144.8163.4满足!411.200.098.0100.8198.8234.4满足!518.2016.589.6163.8253.4359.0满足!628.2023.076.4253.8330.2524.0满足!738.2023.066.5343.8410.3659.0满足!*** --土层的应力扩散角***pz--下卧层顶面处的附加应力值***pcz--下卧层顶面处土的自重压力值***fz--下卧层顶面处经深度修正后的地基承载力特征值
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