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PHC 管樁在高烈度軟土區(qū)高層建筑中的設(shè)計(jì)與 應(yīng)用研究
王義春1 , 王治海1 , 左恩勝1 , 繆長青2
摘 要

(1 成都基準(zhǔn)方中建筑設(shè)計(jì)有限公司西安分公司, 西安 710054;2 東南大學(xué)土木工程學(xué)院, 南京 211896)

摘要: 以昆明市某高層建筑項(xiàng)目的樁筏基礎(chǔ)設(shè)計(jì)為工程背景,采用 YJK 軟件建立樁筏基礎(chǔ)計(jì)算模型,針對本工程的地質(zhì)狀況,進(jìn)行了高烈度地區(qū)地震組合工況下混凝土 PHC 管樁內(nèi)力研究。 提出了在建筑物輪廓墻體外附近密集布置樁基并適當(dāng)加厚筏板與設(shè)置抗剪彎起鋼筋等提高筏板抗剪承載力的方法,進(jìn)行了 PHC 管樁抗壓優(yōu)化設(shè)計(jì);提出了水浮力與地震組合工況下 PHC 管樁拔力的計(jì)算方法,采用可靠的連接接頭進(jìn)行了 PHC 管樁抗拔優(yōu)化設(shè)計(jì);在分析了樁身拉力對樁身受剪承載力的影響的基礎(chǔ)上,結(jié)合樁頂土體性質(zhì)換填改良與 PHC 管樁填芯的有效措施,進(jìn)行了 PHC 管樁抗剪合理設(shè)計(jì)。 結(jié)果表明該 PHC 管樁適用于高烈度軟土地區(qū)。

關(guān)鍵詞: 高層建筑; PHC 管樁; 高地震烈度軟土地區(qū); 水浮力; 地震拔力; 地震水平力

中圖分類號:TU475+. 1 文獻(xiàn)標(biāo)志碼:A 文章編號:1002?848X(2022)14?0124?07

 

DOI:10?? 19701 / j?? jzjg?? LS202005

 

Research on design and application of PHC pipe pile in high?rise buildings in soft soilarea with high seismic intensity

WANG Yichun1, WANG Zhihai1, ZUO Ensheng1, MIAO Changqing2

(1 Xi’ an Branch of Chengdu Benchmark Fangzhong Architectural Design Co. , Ltd. , Xi’ an 710054, China;2 School of Civil Engineering, Southeast University, Nanjing 211896, China)

Abstract:Taking the piled raft foundation design of a high?rise building project in Kunming as the engineering background,the piled raft foundation calculation model was established by YJK software. According to the geological condition of thisproject, the internal force of concrete PHC pipe piles under combined seismic conditions in high seismic intensity areas wasstudied. A method of densely arranging pile foundations near the outer contour of the building and improving the shearcapacity of the raft by appropriately thickening the raft and setting bent?up bar was proposed, and the optimized design ofthe PHC pipe pile compressing resistance was carried out. A method for calculating the drawing force of PHC pipe pilesunder the combined working conditions of water buoyancy and earthquake action was proposed, and the optimized design ofthe PHC pipe piles drawing resistance was carried out by using reliable connection joints. Based on the analysis of the effectof tension on pile shear capacity, the reasonable design of the PHC pipe piles shearing resistance was carried out bycombining the soil replacement and improvement at the top of the pile and PHC pipe pile core filling measures. The resultsshow that the PHC pipe pile is suitable for soft soil in high seismic intensity area.

Keywords:high?rise building; PHC pipe piles; soft soil area with high seismic intensity; water buoyancy; drawing force ofearthquake; horizontal seismic force

∗國家自然基金項(xiàng)目(51778135),國家重點(diǎn)研發(fā)計(jì)劃項(xiàng)目(2017YFC0806001)。
第一作者:王義春,碩士,工程師,一級注冊結(jié)構(gòu)工程師,主要從事民用建筑結(jié)構(gòu)設(shè)計(jì)與研究,Email:Wangyic87@ 163. com。
 
[引用本文] 王義春,王治海,左恩勝,等. PHC 管樁在高烈度軟土區(qū)高層建筑中的設(shè)計(jì)與應(yīng)用研究[ J]. 建筑結(jié)構(gòu),2022,52(14):124?130,16. WANG Yichun, WANG Zhihai, ZUO Ensheng, et al. Research on design and applicationof PHC pipe pile in high?rise buildings in soft soil area with high seismic intensity[J]. Building Structure,2022,52(14):124?130,16.
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