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近年来,液压滑动模板施工工艺已在国内广泛采用,收到了很好效果。目前所用的HQ-30型千斤顶上下卡头(或称爬升器)一直沿用滚珠式的,这种卡头在设计负荷下自锁性能可靠,具有一定优点。但制作复杂,装
In recent years, hydraulic sliding formwork construction technology has been widely used in China and has received very good results. The currently used HQ-30 jack upper and lower chucks (or climbers) have always been ball-type. This chuck has reliable self-locking performance under design load and has certain advantages. But the production is complicated and installed