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在环形预应力混凝土电杆的制造工艺中,普遍受到重视的是混凝土拌制、预应力张拉、离心成型和蒸气养护等工序。然而,作为预应力钢筋的冷拔丝工艺未必受到十分注意。这在当前钢材供货紧缺、产地牌号不一的情况下,如何进一步加强冷拔丝工艺的控制和管理,对于钢筋材性的改善、强度的提高和消耗的降低,更显得十分重要,对此研究也更为迫切。为此,本文就此问题作些探讨。据1984年度全省各电杆厂提供的数字,以梢径?150×40×10000×D级的电杆为例,取其B点截面处的配筋面积与钢材使用指数作比较,可以看出:配筋截面与钢材使用指数成正比——截面小的,用钢少;截面
In the manufacturing process of annular prestressed concrete poles, the commonly-accepted processes are concrete mixing, prestressed tensioning, centrifugal molding and steam curing. However, the cold wire drawing process as a prestressed steel bar is not necessarily paid much attention. In the current situation of tight supply of steel products and different brands, how to further strengthen the control and management of the cold wire drawing process is even more important for improving the properties of steel bars, increasing strength, and reducing consumption. It is also more urgent. For this reason, this article makes some discussion on this issue. According to the figures provided by the pole factories of the province in 1984, taking the pole diameter of 150 × 40 × 10000 × D pole as an example, the area of the reinforcing bars at the B-point cross section can be compared with the steel use index. Out: The cross-section of the reinforcement is proportional to the index of use of the steel - small cross-section, less steel, cross-section