饱和土中桩水平振动分析  

Horizontal vibration of piles in saturated soil

作　　者：尚守平[1] 余俊[1] 王海东[1] 任慧[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《岩土工程学报》2007年第11期1696-1702,共7页Chinese Journal of Geotechnical Engineering

基　　金：湖南省科技计划重点项目(06SK4057);国家自然科学基金资助项目(50578062);教育部重点项目基金(重点03122)

摘　　要：基于Biot动力固结方程,将Novak薄层法应用于饱和土介质桩土相互作用研究中。首先引入势函数对方程解耦,采用算子分解及分离变量法结合桩土耦合条件求出桩土相互作用阻抗函数。与Novak薄层法得到的单相土层水平振动阻抗系数对比,阐明了两解之间的关系。通过参数分析,表明渗透系数及桩土模量比、桩长径比对单桩水平、摇摆及水平–摇摆耦合振动阻抗有一定影响。Based on the Biot＇s consolidation equation, Novak＇s thin layer method was applied to the study of pile-soil interaction in saturated soil. The potential functions were introduced to decouple governing differential equations, then by virtue of differential operator splitting and variable separation method combined with the assumption of perfect contact between the pile and the soil, impendance function of pile-soil interaction was obtained. The comparisons between Novak＇s single-phase solution and the tow-phase solution were presented. A parametric study was conducted to determine the main features of pile-soil interaction during horizontal vibration. As a result, there were some effects of permeability coefficient, pile-soil modulus ratio and pile slenderness ratio on the impedance of rocking, horizontal and coupled horizontal-rocking vibrations of single pile.

关 键 词：饱和土 桩土相互作用 Novak薄层法 水平振动 阻抗函数 

分 类 号：TU435[建筑科学—岩土工程]