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10秒装修报价 装修要花多少钱?获得精准报价,省钱30%
168211
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一、确定墙高 二、墙上荷载(主动土压力、墙上移动荷载、振动系数) 三、墙体型式 四、墙底基底承载力 五、计算 1)抗倾覆计算(主动土压力+移动荷载*振动系数) 2)抗滑动计算(同上 ) 3)墙身水平截面强度验算 4)墙身垂直截面变位计算(截面应力校核) 六、设计 1、根据具体情况,通过技术和经济比较,确定墙址位置; 2、测绘墙址处的纵向地面线,核对路基横断面图,收集墙址处的地质和水文等*; 3、选择墙后填料,确定填料的物理力学计算参数和地基计算参数; 4、进行挡土墙断面型式、构造和材料设计,确定有关计算参数; 5、进行挡土墙的纵向布置; 6、用计算法或套用标准图确定挡土墙的断面尺寸; 7、绘制挡土墙立面、横断面和平面图。
与传统倾斜基底抗滑动的措施相比,可节约20%左右的挡土墙圬工体积。可以利用代数法设计挡土墙断面尺寸,那样可以扩大点面积的。
大庄二级公路重力式挡土墙设计 3 山坡墙设置在路堑或路堤上方,用于支撑山坡上可能坍滑的覆盖层、破碎岩层或山体滑坡(图1-1e、图1-1f)。 1挡土墙适用条件 挡土墙类型的划分方法较多,一般以挡土墙的结构形式分类为主,常见的挡土墙形式有:重力式、衡重式、悬臂式、扶壁式、加筋土式、锚杆式和锚定板式。各类挡土墙的适用范围取决于墙址地形、工程地质、水文地质、建筑材料、墙的用途、施工方法、技术经济条件及当地的经济等因素。 重力式挡土墙 重力式挡土墙一般由块石或混凝土材料砌筑。重力式挡土墙是靠墙身自重保证墙身稳定的,因此,墙身截面较大,适用于小型工程,通常墙高小于8米,但结构简单,施工方便,能就地取材,因此广泛应用于实际工程中。 悬臂式挡土墙 当地基土质较差或缺少石料而墙又较高时,通常采用悬臂式挡土墙,一般设计成L型(图1.2a),由钢筋混凝土建造,墙的稳定性主要依靠墙踵悬臂以上土重来维持。墙体内设置钢筋以承受拉应力,故墙身截面较小。 扶壁式挡土墙 由墙面板、墙趾板、墙踵板和扶肋组成,即沿悬臂式挡土墙的墙长方向,每隔一定距离增设一道扶肋,把墙面板和墙踵板连接起来。(图1.2b)适用于缺乏石料的地区或地基承载力较差的地段。当墙高较高时,比悬臂式挡土墙更为经济。