重力式挡土墙课程设计(通用版).doc

重力式挡土墙课程设计 作者姓名 学号 班级 学科专业 土 木 工 程 指导教师 所在院系 建 筑 工 程 系 提交日期 设计任务书 设计题目 本次课程设计题目：重力式挡土墙设计 设计资料 1、线路资料：建设地点为某一级公路DK23+415.00~DK23+520.00段，在穿过一条深沟时，由于地形限制，无法按规定放坡修筑路堤，而采取了贴坡式（仰斜式）浆砌片石挡土墙。线路经过的此处是丘陵地区，石材比较丰富，挡土墙在设计过程中应就地选材结合当地的地形条件，节省工程费用。 墙后填土为碎石土，重度，内摩擦角；墙后填土表面为水平，即，其上汽车等代荷载值；地基为砾石类土，承载力特征值；外摩擦角取；墙底与岩土摩擦系数。 墙体材料采用MU80片石，M10水泥砂浆，砌体抗压强1.14，砌体重度 4、挡土墙布置形式如下图所示 图4-1　挡土墙参数图（单位：m） 目录 设计任务书·················································2 一、设计题目·············································2 二、设计资料·············································2 设计计算书·················································4 一、设计挡土墙的基础埋深、断面形状和尺寸·················4 二、主动土压力计算·······································4 1、 计算破裂角········································4 2 、计算主动土压力系数K和K1··························4 3、计算主动土压力的合力作用点·························5 三、挡土墙截面计算·······································5 1、计算墙身重G及力臂ZG·······························6 2、抗滑稳定性验算·····································6 3、抗倾覆稳定性验算···································6 4、基底应力验算·······································7 5、墙身截面应力验算···································7 四、设计挡土墙的排水措施·································8 五、设计挡土墙的伸缩缝和沉降缝···························8 六、参考文献·············································8 七、附图·················································8 设计计算书 一、设计挡土墙的基础埋深、断面形状和尺寸 如图所示，挡土墙墙体高为H=8.5m，基础埋置深度d=1.5m,墙身纵向分段长度为L=10m；墙面与墙背平行，墙背仰斜，仰斜坡度1：0.2()，墙底倾斜度0.2:1（ω=11.31°），墙顶宽2.1m，墙底宽2m。 二、主动土压力计算 1、 计算破裂角 经试算，按破裂面交于荷载中部进行计算： 90° tan=-tan+ =-0.667+=0.486 =26° 2 、计算主动土压力系数K和K1 K= = 3、计算主动土压力的合力作用点 kN = 三、挡土墙截面计算 图3-4-1 挡土墙计算图 1、计算墙身重G及力臂ZG 墙身体积计算： 墙身自重计算： 力臂ZG计算： ZG1=0.125H+0.476b1=0.125×8.5+0.476×2.1=2.06m ZG2=0.651b1=0.651×2.1=1.37m 2、抗滑稳定性验算 满足抗滑稳定性要求。 3、抗倾覆稳定性验算 墙底倾斜，需把求得的、修正为、。 满足抗倾覆稳定性要求。 4、基底应力验算