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顏少榮¹，袁國(guó)清¹，張  明²
(1 五邑大學(xué)土木建筑學(xué)院，江門529020; 2 佛利建設(shè)工程有限公司江門分公司，江門529000)

[摘要] 介紹一種高效、快捷的原位提升輸電線路鐵塔的施工方法——“自爬式頂升法”。該法以接長(zhǎng)的原地腳螺栓為爬桿，以螺母為崮定支點(diǎn)，以4個(gè)千斤項(xiàng)為提升設(shè)備，實(shí)施同步協(xié)調(diào)頂升操作。為保證頂升時(shí)螺桿的穩(wěn)定和安全，采用了預(yù)應(yīng)力轉(zhuǎn)換技術(shù)。該技術(shù)成功地把大部分塔腳壓力通過預(yù)應(yīng)力轉(zhuǎn)換結(jié)構(gòu)傳遞給基礎(chǔ)，從而避免螺桿受壓力過大而失穩(wěn)。
[關(guān)鍵詞] 預(yù)應(yīng)力鋼結(jié)構(gòu)；鐵塔；原位項(xiàng)升；壓桿穩(wěn)定

    Prestressed conversion technology application to lift tower in situ
    Yan Shaorong¹, Yuan Guoqing¹, Zhang Ming²
    (1 School of Civil Engineering ,Wuyi University, Jiangmen 529020, China; 2 Foley Construction Co., Ltd., Jiangmen Branch, Jiangmen 529000, China)

Abstract: An efficient, fast and in situ lifting power transmission tower construction method- self-climbing and lifting method was introduced. The method makes the original long bolt as climbing pole, nut as fixed pivot, 4 jacks as the lifting equipment, to implemente of synchronized jacking operation. The prestressed conversion technology is used to ensure the stability and security of the lifting bar. The technology has successfully passed the most pressure to the tower base through prestressed conversion frame, to avoid excessive pressure on the screw instability.
Keywords: prestressed steel frame; steel tower; lifting in situ; bar stability