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(1 貴陽(yáng)金陽(yáng)建設(shè)投資有限公司，貴陽(yáng) 550001；2 北京市建筑工程研究院，北京 100039；3 中國(guó)航空規(guī)劃建設(shè)發(fā)展有限公司，北京 100120)

［摘要］詳細(xì)介紹了貴陽(yáng)奧體中心主體育場(chǎng)整套預(yù)應(yīng)力施工技術(shù)。采取在拉索兩端拉一根鋼絲繩，由一端向另一端滑移的方法完成拉索安裝；采取對(duì)稱分級(jí)的張拉方法，總體上分為3級(jí)張拉完成，第1級(jí)張拉完成后拆除支撐，而后進(jìn)行第2和第3級(jí)預(yù)應(yīng)力張拉。實(shí)踐證明，方案技術(shù)上合理，降低了施工成本。使用有限元計(jì)算軟件MIDAS，對(duì)預(yù)應(yīng)力施工過(guò)程進(jìn)行了詳細(xì)的仿真計(jì)算分析，計(jì)算結(jié)果表明，張拉過(guò)程中拉索索力相互影響比較小，卸載完成后，結(jié)構(gòu)豎向位移變化較大，張拉完成后，結(jié)構(gòu)豎向位移最大變化為63mm，說(shuō)明預(yù)應(yīng)力施加對(duì)結(jié)構(gòu)豎向變形起到一定控制作用。設(shè)計(jì)了詳細(xì)的施工和安全監(jiān)測(cè)方案，監(jiān)測(cè)數(shù)據(jù)表明索力、結(jié)構(gòu)豎向位移、構(gòu)件內(nèi)力與仿真計(jì)算分析的偏差都在一個(gè)較合理的范圍之內(nèi)，以索力控制為主控參數(shù)，豎向位移為第2控制參數(shù)，并綜合考慮構(gòu)件內(nèi)力，確認(rèn)施工張拉已經(jīng)達(dá)到設(shè)計(jì)及相關(guān)驗(yàn)收標(biāo)準(zhǔn)要求。

［關(guān)鍵詞］   大懸挑預(yù)應(yīng)力鋼結(jié)構(gòu)；仿真計(jì)算；施工監(jiān)測(cè)；施工技術(shù)

Study on prestressing construction technology of the main stadium in Guiyang Olympic Sports Center

Zeng Jun1, Zhou Shunhao2, Wang Zeqiang2, Wu Yuanhua2, Ge Jiaqi3, Fu Yan1

(1 Guiyang Jinyang Construction Investment Co., Ltd., Guiyang 550001, China; 2 Beijing Building Construction Research

Institute, Beijing 100039, China; 3 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China)

Abstract:The prestressing construction technology of the main stadium in Guiyang Olympic Sports Center was introduced. The cables were installed by the steel wire which was from one end to the other end of the cable. Adopting symmetrical classification method, the cables were tensioned in three steps. The support was moved after the first step was finished. Then the second and third steps were carried out. Practice has proved that the technology is reasonable and the cost of construction is reduced. Using MIDAS software, the simulation analysis of prestressing  construction process was carried out. It shows from the result that the cable force is little affecting each other in course of tension. After the support is moved, the vertical displacement is very big. And the change of vertical displacement is about 63mm after the prestressing is finished. It shows that the prestressing plays a certain role in vertical deformation control. The monitoring plan of construction and security was finished. The monitor data show that the cable force, displacement and steel stress are all in reasonable range.With the cable tension as the main control parameter and the vertical displacement as the second control parameter and the stress of steel being taken into account simultaneously, the cable tensioning has reached the design and criteria requirement.

Keywords:large cantilever prestressed steel structure; simulation calculation; construction monitoring; construction technology

貴州省科技廳工業(yè)攻關(guān)項(xiàng)目(［2010］3002),貴陽(yáng)市科技局工業(yè)攻關(guān)項(xiàng)目［2010］。

作者簡(jiǎn)介：曾軍，碩士，高級(jí)工程師，副總經(jīng)理，Email:zjj0521@163.com。

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