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建筑工程部建筑科学研究院钢筋混凝土结构研究室创造成功一种生产预应力混凝土新工艺——热张法。采用热张法既不需要千斤顶,也不需要象电热法似的一套设备。只要在现场砌筑一座特殊设计的加热炉,将构件的应力钢筋的长度事先决定,放入条形的炉槽内进行加热至一定温度时将受热伸长的钢筋由槽中取出穿入构件,并按规定长度装上锚固设备,待钢筋逐渐冷却
Building Engineering Research Institute of Building Science and Technology Reinforced Concrete Structure Laboratory to create a successful production of a new prestressed concrete technology - heat Zhang method. Heat tension method does not require a jack, also do not need to like a set of equipment like electric law. As long as a specially designed heating furnace at the site, the length of the component of the pre-stressed steel bar, placed in a bar-shaped furnace heated to a certain temperature will be heated by the elongation of the bar removed from the slot penetrate the member, And according to the provisions of the length of anchoring equipment installed, until the steel cooling gradually