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(1 筑博設(shè)計(jì)股份有限公司, 深圳 518035; 2 奧雅納工程咨詢 (上海) 有限公司, 上海 200031;3 鐵獅門投資咨詢 (上海) 有限公司, 上海 200041)

摘要: 聯(lián)想后海大廈位于深圳后海中心區(qū),兩棟塔樓在高區(qū)懸挑轉(zhuǎn)換,均采用框架-核心筒( 帶高位轉(zhuǎn)換) 結(jié)構(gòu)體系,對(duì)基礎(chǔ)沉降極為敏感. 項(xiàng)目所在場(chǎng)地基巖面較深,大部分區(qū)域中風(fēng)化巖埋深超過(guò) 120m,超高層建筑采用嵌巖樁施工困難. 項(xiàng)目結(jié)合后海地區(qū)其他項(xiàng)目經(jīng)驗(yàn),最終選用樁端及樁側(cè)均后注漿的灌注樁技術(shù),以強(qiáng)風(fēng)化巖為樁基礎(chǔ)持力層. 通過(guò)在承壓及抗拔試驗(yàn)樁上對(duì)應(yīng)位置設(shè)置壓力應(yīng)變片,靜載試驗(yàn)分級(jí)加載時(shí)同步讀取應(yīng)變數(shù)據(jù)并推算不同樁身處的應(yīng)力,分析后海地區(qū)樁側(cè)不同土層及樁端持力層在后注漿施工工藝下對(duì)應(yīng)的土層后注漿增強(qiáng)系數(shù)與規(guī)范建議值的差異,最終確定后注漿端阻及側(cè)阻參數(shù),優(yōu)化了承壓及抗拔樁,節(jié)約造價(jià)并縮短工期.

關(guān)鍵詞: 超高層建筑; 轉(zhuǎn)換結(jié)構(gòu); 灌注樁; 后注漿工藝; 原位靜載試驗(yàn)

中圖分類號(hào):TU473. 1+4 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)03-0133-05

DOI:10. 19701 / j. jzjg. 20201468

Design of post-grouting piles for super high-rise building of Lenovo Houhai Building

LI Bin1, HE Baohua1, LI Hongbo1, ZHU Ligang2, ZOU Jinlin2, SUN Qiang3

(1 Zhubo Design Co. , Ltd. , Shenzhen 518035, China; 2 Arup Engineering Consulting (Shanghai) Co. , Ltd. ,Shanghai 200031, China; 3 Tishman Speyer Investment Consulting (Shanghai) Co. , Ltd. ,Shanghai 200041, China)

Abstract:Lenovo Houhai Building is located in the central area of Houhai, Shenzhen. The two towers extend and transferin the high area, and both of them adopt the frame-core tube with high level transfer structure system, which is extremelysensitive to the foundation settlement. The bedrock surface of the project site is deep, and the buried depth of moderatelyweathered rock in most areas is more than 120m. Under such situation, it is extremely difficult to adopt rock-socketed pilesfor super high-rise building. Combined with the experience of other projects in Houhai area, the project finally selects thecast-in-place pile technology of post grouting at the pile end and pile side, and take the moderately weathered rock as thepile foundation bearing stratum. By setting pressure strain gauges on the corresponding positions of the bearing and uplifttest piles, synchronously reading the strain stress data and calculating the stresses of different piles during the static loadtest stage loading, the difference between the corresponding soil layer post grouting actual improvement coefficients and therecommended values in the code under the post grouting construction technology of different soil layers at the pile side andalso pile end bearing layers in Houhai area was analyzed. Finally, the post grouting end resistance and side resistanceparameters were determined, the bearing and uplift piles were optimized, the cost was saved and the construction periodwas shortened.

Keywords:super high-rise building; transfer structure; cast-in-place pile; post-grouting technology; in situ static load test

第一作者:李斌,學(xué)士,高級(jí)工程師,一級(jí)注冊(cè)結(jié)構(gòu)工程師,Email:Li. bin2@ zhubo. com.

[引用本文] 李斌,何寶華,李宏波,等. 聯(lián)想后海大廈超高層建筑后注漿灌注樁設(shè)計(jì)[ J]. 建筑結(jié)構(gòu),2023,53(3):133-137,151. LI Bin ,HE Baohua ,LI Hongbo,et al. Design of post-grouting piles for super high-rise building ofLenovo Houhai Building[J]. Building Structure,2023,53(3):133-137,151.