双代号网络图的绘制方法82ppt课件

上海建峰职业技术学院上海建峰职业技术学院主讲：姚奎发主讲：姚奎发2019 2019 年年 5 5 月月 8 8 日日教学目的：教学目的：1 1使学生掌握绘制双代号网络图的根本规使学生掌握绘制双代号网络图的根本规那么；那么；2 2掌握虚箭头的概念及运用；掌握虚箭头的概念及运用；3 3能根据义务的逻辑关系绘制双代号网络能根据义务的逻辑关系绘制双代号网络图图教学过程：教学过程：一、网络图的逻辑关系一、网络图的逻辑关系逻辑关系逻辑关系 包括包括 工艺关系工艺关系组织关系组织关系 一、网络图的逻辑关系一、网络图的逻辑关系如图如图1 1：图图1一、网络图的逻辑关系一、网络图的逻辑关系支模支模1 1 扎筋扎筋1 1 浇混凝土浇混凝土1 1 工工艺关系艺关系支模支模2 2 扎筋扎筋2 2 浇混凝土浇混凝土2 2 支模支模1 1 支模支模2 2扎筋扎筋1 1 扎筋扎筋2 2 组组织关系织关系浇混凝土浇混凝土1 1 浇混凝土浇混凝土2 2二、绘制网络图的根本规那么二、绘制网络图的根本规那么1 1必需正确表达逻辑关系必需正确表达逻辑关系a aA A完成后进展完成后进展B B和和C C 图图b bA A、B B完成后进展完成后进展C C和和D D 图图二、绘制网络图的根本规那么二、绘制网络图的根本规那么1 1必需正确表达逻辑关系必需正确表达逻辑关系c cA A完成后进展完成后进展C C；A A、B B完成后进展完成后进展D D图图d dA A完成后进展完成后进展C C；A A、B B完成后进展完成后进展D D；B B完成后进展完成后进展E E 图图二、绘制网络图的根本规那么二、绘制网络图的根本规那么2 2严禁出现循环回路严禁出现循环回路图图二、绘制网络图的根本规那么二、绘制网络图的根本规那么3在节点之间严禁出现带双向箭头或无在节点之间严禁出现带双向箭头或无箭头的连线箭头的连线 图图7 二、绘制网络图的根本规那么二、绘制网络图的根本规那么4 4严禁出现没有箭头节点或没有严禁出现没有箭头节点或没有箭尾节点的箭线箭尾节点的箭线 图图二、绘制网络图的根本规那么二、绘制网络图的根本规那么5 5严禁出现反复编号的箭线严禁出现反复编号的箭线 图图二、绘制网络图的根本规那么二、绘制网络图的根本规那么6 6当双代号网络图的某些节点有多当双代号网络图的某些节点有多条外向箭线或多条内向箭线时普通条外向箭线或多条内向箭线时普通44条条 图图二、绘制网络图的根本规那么二、绘制网络图的根本规那么7 7交叉箭线画法交叉箭线画法过桥法过桥法 指向法指向法二、绘制网络图的根本规那么二、绘制网络图的根本规那么8 8双代号网络图中应只需一个起点双代号网络图中应只需一个起点节点，在不分期完成义务的网络图中，节点，在不分期完成义务的网络图中，应只需一个终点节点，而其他一切节应只需一个终点节点，而其他一切节点均应是中间节点点均应是中间节点.三、双代号施工网络图的陈列方法三、双代号施工网络图的陈列方法1 1工艺顺序按程度方向陈列工艺顺序按程度方向陈列 图图三、双代号施工网络图的陈列方法三、双代号施工网络图的陈列方法2 2施工段按程度方向陈列施工段按程度方向陈列 图图四、绘图例如四、绘图例如 义务的逻辑关系如表所示，绘制义务的逻辑关系如表所示，绘制双代号网络图双代号网络图义务义务 A B C D E F G H I J紧前紧前 A B B B C C F F H义务义务 D E G I四、绘图例如四、绘图例如如以下图：如以下图：图图11五、布置作业五、布置作业 1 1阅读教材阅读教材P42-P47P42-P472 2思索在绘制双代号网络图时，哪三种思索在绘制双代号网络图时，哪三种情况必需引入虚箭线？情况必需引入虚箭线？3 3绘制双代号网络图，教材绘制双代号网络图，教材P85P85习题习题1 1 欢迎多提珍贵意见！欢迎多提珍贵意见！：mile:shjf_xsshjf 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