钢支撑指运用钢管、H型钢、角钢等增强工程结构的稳定性，一般情况是倾斜的连接构件，最常见的是人字形和交叉形状。目前钢支撑在地铁、基坑围护方面被广泛应用。因钢支撑可回收再利用，具有经济性、环保性等特征。
1、钢支撑（格栅）应采用工厂预制，要按1：1放样，严格控制轴线、尺寸、接头拼接板对位的准确，要满足规范对焊缝的要求。
2、钢支撑（格栅）定位、锁脚锚杆的布设，要在检查开挖断面合格后进行，要严格按设计部位安设，锚杆的钻眼方位、方向、角度、深度要达到设计要求。
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