| 1. | Vibration of inhomogeneous viscous - elastic pile embedded in layered soils with general voigt model
端承桩与土纵向耦合振动时桩顶响应解析研究 |
| 2. | Using high - strain dynamic tentative piling technique ， one can obtain the pile endpoint resistance at each hit in the process of hammering , which is the bearing capacity of the pile endpoint soil against the pile
运用高应变动力试桩法，可以获得桩在打入过程中的每一锤击下的桩端阻力，即桩端土对桩的端承力。 |
| 3. | The main original work is as the followings : 1 . longitudinal vibration of an integral pile in an uniform soil with end bearing boundary or elastic bottom boundary undergoing vertical harmonic load is theoretically investigated
主要工作如下： 1 、分别对均质土中完整端承桩和弹性支承桩在垂直谐和激振力作用下的纵向振动特性进行了研究。 |
| 4. | At first , based on the results of field pile tests , conclusions are made that the resistance of expanded branches or plates behaves mainly as end - bearing force , and this new type of pile can be classified as multi - end - bearing piles with friction
首先，通过现场试验结果，深入分析了挤扩支盘桩单桩的荷载传递机理，指出挤扩支盘桩的支盘阻力主要体现端承力的性质，并将挤扩支盘桩定性为摩擦多支点端承桩。 |
| 5. | A dynamic interaction schematic of an end bearing or elastic bearing pile with arbitrary force at pile top is founded . by using helmholtz resolution and the operator decomposition method , biot ' s equations governing motions of a porous solid saturated with interstitial fluid are decoupled
建立饱和土中端承桩和摩擦桩在任意激振力作用下的理论模型，利用位移势函数及微分算子分解方法，得到饱和土层biot动力固结方程的分离变量解。 |
| 6. | Novak layer method is introduced to obtain the vertical dynamic impedances of both an end - bearing pile and a floating pile in a homogenous stratum . and the vertical dynamic impedances of single pile are analyzed in homogenous elastic soil , inhomogenous viscoelastic soil homogenous viscoelastic soil . at the same time , the factors to influence the impedances of single pile are examined
本论文采用novak薄层法，推导了在均质地基中，端承单桩和摩擦单桩的动阻抗；并全面分析和对比了均质弹性、均质粘弹性和非均质粘弹性地基模型中的单桩的动力阻抗，考察了各种因素对单桩动力阻抗的影响程度。 |
| 7. | On this foundation the article inducts in detail the method which is based on the relative settlement of calculating unit area end support ( qb ) force at the same time considering the feature of pedestal pile ' s " arch effect " the article introduces conception of pile effective length and finally obtain t he formula of calculating man - made pipe with bulb - shaped axial carrying capacity . the article uses marc program to calculate and analyze foundation soil ' s stress and displacement and gets the change curve chart and the proportion that is shared by king - pipe side soil friction resistance and pipe end counterforce respectively . the article inducts the structure of pedestal in detail on the basis of generalizing pedestal application cases of many countries
在此基础上论文详细归纳了以相对沉降为依据确定单位面积端承力q _ b的计算方法，并考虑扩底桩的“拱效应”特点引入了有效桩长的概念，最后结合公路规范推出了比较实用的人工挖孔扩底桩轴向承载力计算公式。论文运用了marc程序对地基土的应力和位移进行了有限元数值计算分析，得到了地基土的应力和位移场的变化曲线和在加载过程中桩侧土摩阻力和桩端反力各自所承担的比例；本文还在总结各国挖孔扩底桩应用情况的基础上就扩底桩的构造进行了详细的归纳。 |
