基于桩土耦合作用的山坡薄壁管桩结构参数变化对力学性能影响分析  

The Impact Analysis of Slopes Thin-wall Pipe Pile Structure Parameters on the Mechanical Properties Based on the Coupling Action of Piles and Soil

作　　者：蒲瑜 

机构地区：[1]重庆建筑工程职业学院,重庆400074

出　　处：《公路工程》2015年第4期261-265,269,共6页Highway Engineering

摘　　要：边坡上的建筑结构,由于山坡坡势的变化,基础一般承受水平荷载。运用桩基在水平荷载作用下的计算理论,对某建筑结构进行了在水平荷载下桩-土共同耦合作用的受力机理及工作性能研究,并建立山坡管桩在水平荷载作用下的有限元模型,通过改变管桩刚度、直径、壁厚、桩长等结构参数,对桩体在桩—土共同作用下的工作状态进行数值模拟,研究山坡薄壁管桩承受水平荷载时的受力、变形规律,结果表明:在横向荷载作用下,桩体的顶部出现的位移最大,且随着入土深度的增加水平位移不断减小,在桩体达到一定深度时,位移值出现了转折点,桩底出现嵌固作用;桩身弯矩随弹性模量、外径、桩长的增加而增大,随桩体壁厚的增加而减小;对桩身水平位移影响最大的为桩体弹性模量、外径、桩长,而壁厚对桩身水平位移基本没有影响;桩身的水平位移随桩体弹性模量、外径、桩长增加而减小。On the slope structures,due to the changes of Shan Po Po potential,foundation under horizontal load. Using the theory of pile foundation under horizontal load,the structure of a building on the pile and soil under horizontal load force mechanism of the mutual coupling effect and performance research,and to establish a finite element model of slope pipe pile under horizontal load,by changing the pile stiffness,diameter,wall thickness,pile length,structure parameters,such as under the action of the pile in the pile-soil common working condition to carry on the numerical simulation,study the stress of the slope when the thin wall pipe pile under horizontal load,deformation regularity,the results show that under horizontal load,the displacement of the top of the pile of the largest,and the horizontal displacement and decreases with the increase of soil depth,when the pile reaches a certain depth,displacement values appeared a turning point,pile bottom a built-in function; Pile bending moment along with the elastic modulus increases with increasing pile length,diameter,and decreases with the increase of the pile body wall thickness. For the greatest influence of horizontal displacement of pile pile elastic modulus,pile length,diameter,and wall thickness has no effect on horizontal displacement of pile is basic; the horizontal displacement of the pile decreases with the elastic modulus、diameter and pile length＇s increasing.

关 键 词：桩土耦合 管桩 受力状态 结构参数 

分 类 号：TU473.16[建筑科学—结构工程]