- 摘 要
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(天津大學建筑設計規(guī)劃研究總院有限公司, 天津 300073)
摘要: 對于臨近地鐵建筑工程的超深地下室,需考慮其建造過程對地鐵運行及周邊環(huán)境的不利影響,逆作法對此類工程有較強的適用性. 重點介紹了某工程樁已經(jīng)施工完畢的臨近地鐵工程逆作法施工設計的兩個方面:利用部分主體結構梁板形成拱形水平支承系統(tǒng),將水平力可靠傳遞至既有結構,保留塔樓核心筒和部分裙房區(qū)域作為順作施工空間;采用在主體柱、墻以外布置豎向支承柱進行支承系統(tǒng)轉換的方法,待逆作完成后,再順作主體結構柱、墻,解決因工程樁已先期施工完畢,而導致無法采用傳統(tǒng)逆作法中豎向支承柱和主體柱、墻合一布置的問題. 該逆作法可最大程度上減小逆作施工范圍,方便出土,提高施工效率. 最后對該逆作法實施過程中特有的結構主框梁和支承梁在不同工況下的因支座條件改變應該注意的事項進行了總結.
關鍵詞: 逆作法; 超深地下室; 豎向支承柱; 豎向支承樁; 支承系統(tǒng)
中圖分類號:TU753 文獻標志碼:A 文章編號:1002?848X(2022)16?0125?07
DOI:10. 19701 / j. jzjg. 20210435
Application of top?down method in a project with completed construction of engineering piles
ZHU Lipeng, ZHANG Shuyuan, FENG Haitao
(Tianjin University Research Institute of Architectural Design and Urban Planning Co. , Ltd. , Tianjin 300073, China)
Abstract: For adjacent subway projects with ultra?deep basement, it is necessary to consider the adverse effects of itsconstruction process on the subway operation and the surrounding environment, and the top?down method has strongapplicability to such projects. Two aspects of the construction and design of top?down method of the adjacent subway projectwith the completed construction of engineering piles were emphatically introduced: the arch horizontal support system isformed by using part main structure’ s beams and slabs, and the horizontal force is reliably transmitted to the existingstructure, then the core tube of the tower and some podium areas are retained as the down?top construction space. A methodof arranging vertical support column outside the main column and the wall to transform the bracing system was adopted,after the top?down construction was completed, the main structural column and the wall are construct with the down?topconstruction process, which solves the problem that the vertical support column, the main column and the wall can not bearranged in the same position which is common in the traditional top?down method because the construction of theengineering pile has been completed in advance. This top?down method can minimize the scope of top?down construction,facilitate excavation and improve construction efficiency. Finally, the matters needing attention due to the change of bearingconditions of the main frame beams and support beams in different working conditions were summarized during theimplementation of this top?down method.
Keywords:top?down method; ultra?deep basement; vertical support column; vertical support pile; bracing system
第一作者:朱黎蓬,碩士,正高級工程師,一級注冊結構工程師,主要從事復雜結構分析設計、減隔震、裝配式設計研究,Email:358501993@ qq. com.
[引用本文] 朱黎蓬,張書鴛,馮海濤. 逆作法在某工程樁已施工完畢工程中的應用[ J]. 建筑結構,2022,52(16):125?131. ZHU Lipeng,ZHANG Shuyuan,FENG Haitao. Application of top?down method in a project with completedconstruction of engineering piles [J]. Building Structure,2022,52(16):125?131.
