【简答题】某桥墩为混凝土实体墩刚性扩大基础,荷载组合 II 控制设计:支座反力 P 1 =840kN 及 P 2 =930kN; 桥墩及基础自重 P 3 =5480kN ;设计水位以下墩身及基础浮力 P 4 =1200kN ;制动力 T 1 =84kN ;墩帽与墩身风力分别为 T 2 =2.1kN 和 T 3 =16.8kN 。结构尺寸如图(基底宽 3.1m ,长 9.9m ),已知土质持力层地基容许应力为...
【单选题】T here are mainly four producing areas in China, all distributed in the south : southern areas (华南茶区) , southwestern areas (西南茶区) , Jiangnan areas (江南茶区) , and ( ).