- 摘 要
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(東南大學(xué)巖土工程研究所，南京 210096)
［摘要］軟土地區(qū)多高層建筑在竣工后沉降長期緩慢發(fā)展，嚴(yán)重的將影響建筑物的正常使用甚至造成破壞。通常加固區(qū)的沉降在施工過程中基本完成，長期發(fā)展的沉降主要是樁基礎(chǔ)軟弱下臥層固結(jié)造成的。將樁基的承載體系進(jìn)行簡化，利用修正的荷載傳遞法計(jì)算加固區(qū)沉降，并將樁端荷載作為下臥層的附加應(yīng)力，通過求解固結(jié)方程計(jì)算下臥層沉降，將兩者所計(jì)算的沉降迭加作為高層建筑樁基礎(chǔ)沉降，使其能反映沉降的長期發(fā)展趨勢，并利用工程實(shí)例對(duì)計(jì)算方法的準(zhǔn)確性進(jìn)行了驗(yàn)證。
［關(guān)鍵詞］多高層建筑；加固區(qū)沉降；下臥層沉降；長期沉降；修正荷載傳遞法
A simplified foundation loading system to study post-construction settlement of multi-storey buildings
Wang Fei, Miao Linchang(Institute of Geotechnical Engineering of Southeast University, Nanjing 210096, China)
Abstract:The post-construction settlement of multi-storey buildings on soft soil increases as time，more serious situations can effect the stability of buildings, even cause damage. The long-term developing settlement is mainly induced by the consolidation of the sublayer. This paper presents a method that the summation of reinforcement area settlement and sublayer settlement is recognized as the total foundation settlement. The deformation of reinforced zone is analyzed using improved load transmission method. The load at the pile tip is taken as the additional stress of sublayer and the settlement of sublayer is calculated by solving the consolidation equation. The proposed method can reflect the long-term tendency of deformation development. The results of two cases show that the method is effective for long term settlement prediction.
Keywords:multi-storey building; reinforcement area settlement; sublayer settlement; long-term settlement; improved load transmitssion method
國家自然科學(xué)基金項(xiàng)目(50478072)。
作者簡介：王非，博士研究生，Email:wangfei-1982828@163.com。
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