- 摘 要
-
(大連市建筑設(shè)計研究院有限公司, 大連 116021)
［摘要］結(jié)合實際工程城市經(jīng)緯超高層結(jié)構(gòu)的樁-巖（土）復(fù)合地基基礎(chǔ)設(shè)計，提出了利用樁頂預(yù)留沉降間隙來提高樁-巖（土）復(fù)合地基中巖（土）利用率的技術(shù)。采用有限元分析軟件ABAQUS對此工程建立了上部結(jié)構(gòu)-基礎(chǔ)-地基整體三維有限元模型，通過選擇合理參數(shù)及取值，并考慮上部結(jié)構(gòu)剛度和施工模擬分層加載的影響對此工程進行了模擬分析。通過模擬分析，確定了最優(yōu)樁頂預(yù)留沉降間隙量和樁-巖（土）分擔荷載比例（約為0.2∶1），充分利用強風化板巖較高的承載力，減少了樁用量，縮短了施工工期。
［關(guān)鍵詞］超高層結(jié)構(gòu)； 樁頂預(yù)留間隙； 樁-巖（土）復(fù)合地基； 上部結(jié)構(gòu)-基礎(chǔ)-地基三維有限元模型； 樁-巖（土）分擔荷載比例
中圖分類號：TU473.1文獻標識碼：A文章編號：1002-848X(2016)02-0059-06
Pile-rock(soil) composite foundation technology of improving base rock(soil)
utilization rate by reserving pile-top settlement clearance
Wang Lichang, Qiu Xuguang, Li Zhihui, Zuo Qinglin, Liu Nan
(Dalian Institute of Architectural Design Co., Ltd., Dalian 116021, China)
Abstract:Combining with the pile-rock(soil) composite foundation design of an actual Atlas of Cities super high-rise structure project, the pile-rock (soil) composite foundation technology of improving the rock (soil) utilization rate by reserving pile-top settlement clearance was proposed. The general finite element analysis software ABAQUS was used to set up the overall three-dimensional finite element model of superstructure-foundation-base. Simulation analysis was carried out on the project through reasonable parameter and corresponding value selection as well as considering superstructure stiffness and effect of layer-by-layer loading in construction simulation. Through simulation analysis, the optimal reserved pile-top settlement clearance and pile-rock(soil) bearing load ratio (about 0.2∶1) were determined. And the high carrying capacity of highly weathered soil was taken advantage of to reduce the amount of foundation piles and shorten the construction period.
Keywords:super high-rise structure; reserved pile-top clearance; pile-rock (soil) composite foundation; three-dimensional finite element model of superstructure-foundation-base; pile-rock (soil) bearing load ratio
作者簡介：王立長，教授級高級工程師，Email：wang19490621@sina.com。
