在广东国际大厦、京津塘高速公路和北京二、三环路立交桥工程中,取得良好效果的YCJ20型前卡千斤顶最近在北京通过鉴定,并已投入批量生产。中国建研院结构所自1985年开始研制的这种小型千斤顶,主要是为解决在高空、野外和狭小空间内施工时,钢丝、钢绞线的张拉、滑丝处理、卸锚、测力和重复张拉问题。 In the Guangdong International Building, Beijing-Tianjin-Tanggu Expressway and the Beijing 2nd and 3rd Ring Road overpass projects, the YCJ20 type front jacks which have achieved good results were recently approved in Beijing and have been put into mass production. The small jack developed by the China Construction Research Institute’s Institute of Structures since 1985 is mainly designed to solve the tension, wire slipping, unloading, and force measurement of wire and strand during construction in high altitude, in the wild, and in narrow spaces. And repeat tension problems.