l扶壁式钢筋混凝土挡土墙设计

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11、wareness, deepen the County, General Secretary扶壁式挡土墙验算执行标准:公路计算项目: 扶壁挡土墙100803计算时间: 2010-08-03 10:36:05 星期二-原始条件: 墙身尺寸: 墙身总高: 3.200(m) 墙宽: 0.400(m) 墙趾悬挑长DL: 0.600(m) 墙踵悬挑长DL1: 1.800(m) 底板高DH: 0.400(m) 墙趾端部高DH0: 0.300(m) 扶肋间距: 1.200(m) 扶肋厚: 0.400(m) 扶壁两端墙面板悬挑长度: 0.328(m) 钢筋合力点到外皮距离: 50(mm) 墙趾埋深: 0.70

12、0(m) 物理参数: 混凝土墙体容重: 25.000(kN/m3) 混凝土强度等级: C30 纵筋级别: HRB335 抗剪腹筋等级: HPB235 裂缝计算钢筋直径: 20(mm) 挡土墙类型: 一般挡土墙 墙后填土内摩擦角: 35.000(度) 墙后填土粘聚力: 0.000(kPa) 墙后填土容重: 18.000(kN/m3) 墙背与墙后填土摩擦角: 17.500(度) 地基土容重: 18.000(kN/m3) 修正后地基土容许承载力: 160.000(kPa) 地基土容许承载力提高系数: 墙趾值提高系数: 1.200 墙踵值提高系数: 1.300 平均值提高系数: 1.000 墙底摩擦系

13、数: 0.500 地基土类型: 土质地基 地基土内摩擦角: 30.000(度) 土压力计算方法: 库仑 坡线土柱: 坡面线段数: 2 折线序号 水平投影长(m) 竖向投影长(m) 换算土柱数 1 3.000 0.000 0 2 5.000 0.000 0 作用于墙上的附加外荷载数: 1 (作用点坐标相对于墙左上角点) 荷载号 X Y P 作用角 (m) (m) (kN) (度) 1 0.000 0.000 30.000 270.000 地面横坡角度: 20.000(度) 墙顶标高: 0.000(m) 挡墙分段长度: 10.000(m)钢筋混凝土配筋计算依据:混凝土结构设计规范(GB 50010

14、-2002)=第 1 种情况: 组合1= 组合系数: 1.000 1. 挡土墙结构重力 分项系数 = 1.000 2. 填土重力 分项系数 = 1.000 3. 填土侧压力 分项系数 = 1.400 4. 车辆荷载引起的土侧压力 分项系数 = 1.400 5. 附加力 分项系数 = 1.000 = 土压力计算 计算高度为 3.200(m)处的库仑主动土压力 无荷载时的破裂角 = 30.270(度) 按假想墙背计算得到: 第1破裂角: 27.530(度) Ea=57.603 Ex=24.928 Ey=51.930(kN) 作用点高度 Zy=1.067(m) 因为俯斜墙背,需判断第二破裂面是否存在,计算后发现第二破裂面存在: 第2破裂角=27.502(度) 第1破裂角=27.490(度) Ea=54.091 Ex=24.974 Ey=47

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