發(fā)布時間：2018-05-14 19:38

  本文選題：振沖碎石樁 + 軟土復(fù)合地基　； 參考：《水運工程》2016年05期

【摘要】：振沖碎石樁作為散體材料樁與周圍的軟土形成的復(fù)合地基,同鋼筋混凝土樁、鋼管樁等剛性樁形成的復(fù)合地基在工作原理、承載力分析等方面存在著本質(zhì)的不同。與剛性樁相比,碎石樁作為垂直排水通道,能夠加快周圍軟土的排水固結(jié),提高樁間土的整體強(qiáng)度。同時碎石樁自身的承載力發(fā)揮又取決于周圍土體的側(cè)向支撐作用。如何確定碎石樁復(fù)合地基的整體抗剪強(qiáng)度對于發(fā)揮碎石樁的作用至關(guān)重要。以港珠澳大橋香港口岸人工島項目碎石樁的工程應(yīng)用為例,對比碎石樁軟土復(fù)合地基整體抗剪強(qiáng)度計算的異同,通過數(shù)值模擬和現(xiàn)場監(jiān)測等手段對參數(shù)取值進(jìn)行分析,對今后類似工況條件下碎石樁復(fù)合地基的抗剪強(qiáng)度計算具有指導(dǎo)意義。
[Abstract]:As a composite foundation formed by bulk material pile and surrounding soft soil, vibro-impact gravel pile is essentially different from rigid pile such as reinforced concrete pile and steel pipe pile in working principle and bearing capacity analysis. Compared with rigid pile, gravel pile, as a vertical drainage channel, can accelerate the drainage consolidation of surrounding soft soil and improve the overall strength of soil between piles. At the same time, the bearing capacity of gravel pile depends on the lateral support of surrounding soil. How to determine the overall shear strength of gravel pile composite foundation is very important to play the role of gravel pile. Taking the application of gravel pile in artificial island project of Hong Kong Port of Hongkong-Zhuhai-Macao Bridge as an example, this paper compares the differences and similarities of the calculation of overall shear strength of gravel pile soft soil composite foundation, and analyzes the parameters by means of numerical simulation and on-site monitoring. It is of guiding significance for the calculation of shear strength of gravel pile composite foundation under similar working conditions in the future.
【作者單位】： 中國港灣工程有限責(zé)任公司;河海大學(xué);
【分類號】：P75;TU470

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本文編號：1889201