【摘要】：大直徑灌注樁存在有效樁長,其計算公式與所假設(shè)的樁側(cè)阻力分布形式有關(guān),針對不同的樁側(cè)阻力分布形式,有效樁長的計算結(jié)果往往差別較大.基于Mindlin位移解的基本原理和考慮樁徑的影響,確定樁側(cè)摩阻力呈拋物線形分布時所得的有效樁長優(yōu)化計算方法,并根據(jù)計算結(jié)果對其影響因素進(jìn)行分析;最后,結(jié)合工程實例對推導(dǎo)公式進(jìn)行驗證.結(jié)果表明:土體泊松比和樁徑變化均對有效樁長造成影響,而樁徑對有效樁長的影響更顯著.樁徑一定時,土體泊松比對有效樁長的影響隨著E/G的增大而減弱,土體泊松比一定時,樁徑對有效樁長的影響隨著E/G的增大而加強.因此,該假設(shè)下考慮樁徑影響而優(yōu)化的有效樁長計算結(jié)果更接近于工程實際,合理可行.
[Abstract]:There is an effective pile length in large diameter cast-in-place pile, and its calculation formula is related to the assumed pile side resistance distribution form. according to different pile side resistance distribution forms, the calculation results of effective pile length are often quite different. Based on the basic principle of Mindlin displacement solution and considering the influence of pile diameter, the effective pile length optimization method is determined when the pile side friction is paraboloid distribution, and the influencing factors are analyzed according to the calculation results. Finally, the derivation formula is verified by an engineering example. The results show that the Poisson's ratio and pile diameter of soil have influence on the effective pile length, and the pile diameter has a more significant effect on the effective pile length. When the pile diameter is constant, the influence of soil Poisson's ratio on the effective pile length decreases with the increase of E 鈮，

本文編號：2486770