The interaction among embankment fill , horizontal geotextile , pile ( cap ) and subsoil was analyzed based on the principle of minimum potential energy , and pile efficacy was obtained 摘要基于最小势能原理，分析了路堤填土、水平加筋体、桩（桩顶托板）及桩间土之间的相互作用，得到了桩体荷载分担比。
A method for shpae estimation of piles by using measured reponse data at the pile head is propsed , which can be used to determine the size , type and site of a defect in a pile 摘要本文提出了一种用实测桩顶脉冲响应信号估计基桩桩身形状的方法，该方法能定量确定桩身缺陷的位置、延伸?围以及严重程度。
The effects of piles interval , embankment height , cap width , shear modulus of embankment fill , horizontal geotextile tensile strength and pile - subsoil stiffness ratio on pile efficacy , were also carried out 研究了桩间距、路堤高度、桩顶托板宽度、路堤填土剪切模量、水平加筋体拉伸强度及桩土相对刚度对桩体荷载分担比的影响。
Some aspects of the current design and calculation methods are still imperfect and to be developed . according to the settlement of the pile top , the vertical bearing capacity theory is analyzed herein 本文在已有理论基础上，对按桩顶沉降量计算基桩竖向承载力的方法进行了研究，并对洞庭湖区大直径桥梁基桩竖向承载力进行了试验研究。
At first , the propagation and influence of stress wave on the top of the pipe pile were discussed in the paper and a formula was obtained about the time difference between two initial signals which were received from two different points 本文首先研究了应力波在管桩顶面的传播及其影响，并提出了计算不同点激励速度峰值时间差的关系式。
Based on these solutions , a parametric study is conducted to determine the main features of the soil - pile system vibration , and the special influence of viscous damping of soil layer around pile is discussed 基于所得解对桩土动力耦合作用的内在机理、粘弹性土层动力反应特性进行了分析，并重点讨论了桩侧土不同形式材料阻尼对桩顶动力响应的影响。
Single stiffness is presented through q - s curve , and the load of the top of pile is computed by circulating many times , so it can avoid man - made rectification . at the end of the paper , the application of the method is introduced on a project 通过单桩的荷载沉降曲线确定群桩中单桩的刚度，并可用逐次逼近的方法求解桩顶反力和基础沉降，避免了对刚度的非理性调整。
The prototype observation shows that because settlement of soil is larger than that of piles , " arch effect " appears in the embankment so that its weight is gradually transferred from the soil to piles and pile - soil stress ratio increases 现场原型观测表明，桩间土的沉降量大于桩顶的沉降量，填土中出现拱效应，填土荷载逐渐从桩问土向桩顶转移，桩土应力比逐渐增加。
Furthermore , it was shown that load - displacement of pile groups and load distribution on pile top were affected by properties of soil and stiffness ratio of piles to soil , and by length , diameter , spacing , and number of piles 在此基础上，分析了刚性承台条件下超大群桩基础的荷载位移曲线变化规律以及桩顶荷载分布规律受桩土刚度比、桩长、桩径、桩距、桩数、土性等因素的影响规律。
Based on the analytical solution , the influence of all relevant parameters on the settlement behavior of single pile was analyzed and discussed . 2 . the time effect of the settlement of single pile in layered soil was studied 采用分离变量法求解得到了均质地基中受静力荷载作用的单桩桩顶沉降与时间关系的解析解，并据此分析讨论了各种参数的变化对单桩的沉降与时间关系的影响。
