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In this paper, the author sets up the dynamic model of the vibratory extracting-driving piling machine, and carries out the dynamic analysis, parameter calculation and Matlabs simulation for this model. Using the equation reciprocity law to carry out the calculation of soil parameter and simulation, and using the genetic algorithm to make optimization of the machine on the basis of the simulation, the author gets the optimum self-induced vibration frequencies of the machine changing with the depth of the pile and the optimization result of other parameters, thus reaching the conclusion that along with the increase of pile sinking depth, the optimum self-induced vibration frequency becomes bigger, and the vibration mass becomes smaller, hence deepening the knowledge of the dynamic performance of this system.

本文建立了振动沉拔桩机的动力学模型并对这一模型进行了动力学分析、参数计算和Matlab仿真，并利用方程对等法进行土壤参数的计算和仿真，又在仿真的基础上使用遗传算法对桩机进行了优化，从而得出了路基加固振动沉拔桩机随沉桩深度变化而改变的最佳激振频率以及其它参数的优化结果，并得出了随沉桩深度的增加，桩机的最佳激振频率由小变大，最佳参振质量由大变小的结论，深化了对该系统动力学性能规律的认识。

Based on the load transmission mechanism of space truss, and referenced theanalysis of test materials, a formula for calculating the bearing capacity of reinforcedconcrete compression strut is introduced. By using the theory of plastic hinge-line, anupper limit solution of bent bearing capacity for four-pile cap, which coincidesprecisely with the practical measurements, is obtained. By utilizing the reaction ofthe soil under cap and by basing on the method of plastic ultimate analysis, an upperlimit solution of punching shear bearing capacity for pile cap is acquired, which. coincides precisely with the practical measurements, and the formula is similar to thecode.A brief discuss on cooperative work of strip beam of foundation and single rankof piles is made. Separately considering the pile-cap and the pile-group, thencoupling their matrix of rigidity, the inner force of pile-cap is solved by the numericalmethod under some reasonable supposition. In comparison with other method, thecalculating results are exact, reliable and convenient in using. The method provides apowerful tQol fOr further analysis and research on this kind of structure.

本文以空间桁架传力机理为基础，结合试验资料分析，推导了钢筋混凝土等边三桩承台受冲切承载力计算公式；根据塑性铰线理论，导得了与试验结果吻合良好的四桩承台受弯承载力的上限解；利用承台底土反力分布，根据塑性极限分析方法，导得了桩基承台受冲切承载力的上限解，在此基础上，通过简化假定，得到与规范公式相类似的承台受冲切承载力实用公式，该公式能方便考虑台底土反力作用，与试验结果的吻合程度比规范公式好；简要讨论了桩基条形承台梁与单排桩的协同工作分析；在一些合理假定的基础上，将承台与群桩分开考虑，分别得到其刚度矩阵后进行耦合，通过数值方法求解承台内力，算例表明，该方法结果准确，使用方便，为该类结构的进一步分析研究及工程设计提供了强有力的工具。

The load transfer and settlement behavior from the simulation results are also analyzed: most of the column load concentrates on the enlarged column cap, and distributes quickly, there is more load attenuation at the variable section. The skin friction of enlarged column cap develops more adequately than underside column. The column settlement concentrates on enlarged column cap, and soil settlement concentrates on a little area below the variable section.

利用三维数值模拟分析了钉形搅拌桩复合地基的荷载传递和变形特性：钉形搅拌桩桩身荷载主要集中在扩大头部分，且衰减较快，变截面处桩身轴力有较大衰减，扩大头桩侧摩阻力较大，下部桩体侧摩阻力较小；桩身变形集中在扩大头，桩间土变形则集中在变截面以下较短范围内。

According to possible problems in design of multi-pillar pile cap, tension pile ,tie beam,which are all related with pile cap,proper design method is discussed based on author s experience.

针对多柱联合桩承台、抗拔桩及承台、承台间联系梁设计中可能出现的问题，结合个人经验探讨了合理设计方法，并得出在进行抗拨桩的设计时，应特别注意桩与桩之间、桩与承台之间的连接；在联系梁设计中，应根据地质情况和梁跨度，合理选择计算方法的结论。

Combining the construction of the flexible breasting dolphin pile s in the Oil Pier-II Project of Karachi Port in Pakistan,the article mainly expatiates the comparison and selection of construction schemes for large-diameter hole boring and installation of breasting dolphin piles in the case of a lack of construction equipment.

通过对巴基斯坦OP-II码头工程柔性靠船桩的施工实践，阐述在施工设备缺乏的情况下进行大直径钻孔和吊装靠船桩的施工方案比选，以及综合考虑施工情况探讨靠船桩的设计新思路，并在不影响靠船桩正常使用的条件下对柔性靠船桩原设计作出适当变更，供柔性靠船桩设计和施工参考。

In recent years, for effective use of the land, the construction of large civil structures, high-rise buildings with the development of machinery equipment. HThereH HisH HaH HtendencyH using the large and the pile at the deep foundation .In order to understand the pile bear capacity, the pile loading test for confirming the pile design is commonly adapted.

中文摘要近年来为使土地之有效利用，大型土木结构、高层建筑物之兴建且在有效率的机械开发之下，广泛的使用桩径大、桩身长之基桩做为深基础已成为一种趋势，为有效了解基桩承载力，大抵以基桩载重试验来验证基桩设计承载力是否足够。

Dynamic and static comparative analyses of settlements of overlength PHC pipe piles

基于5根桩现场试验资料的分析，对表征管桩承载性状的桩顶荷载-桩顶沉降曲线、桩身压缩-桩顶荷载曲线进行了数学描述。

A new method of calculating stable bearing capacity for overlength pile s;2. Load transfer performance of overlength pile s;3. Considering that there is little study about shaft resistance transfer behavior of overlength pile and the theory is based on short pile yet,shaft load transfer function of overlength single pile which considering depth influence is presented.

考虑到目前的超长桩的桩侧荷载传递性状研究，基本上还是基于短桩理论，提出了考虑超长单桩桩侧摩阻力的深度效应的单桩荷载传递函数，并且将荷载传递法和有限元方法结合起来，采用该荷载传递函数来模拟单桩的桩侧荷载传递规律。

Results of eight investigations make use of the soil experience and analysis form the disaster area of 921 earthquakes, The result of soil investigation and analysis form the disaster area of 921 earthquakes, Understanding such as: 1. The recommand degree depth of drive stake is 40% of stake length for stake and wattling method on dry soil condition. And 58% of stake lengths on unsaturated condition. And 67% of stake length on soil saturated condition.

本研究乃以8个涵盖921集集地震灾区之区域地质样区，采取土样进行试验分析与计算，经研究调查结果得知，乾土时打桩编栅工法桩材的贯入深度建议为桩材长度之40%，半饱和时的桩的贯入深度建议为桩材长度之58%，完全饱和时桩贯入深度建议为桩材长度之67%。

The research of the utility and safety of the hammer was performed. The affecting factors of pile-soil system to the results of dynamic load testing were also analyzed. The results show that there is no tensile force in hammer during impact and it is feasible to utilize the hammer in drilling piles dynamic testing. Drop height, stiffness of cushion, pile length and diameter, and the soil qualities etc. affect the dynamic load testing results considerably.

研究结果表明：锤体冲击过程中基本不受拉力，符合试验要求；特大型组合式基桩高应变动力试桩重锤应用于灌注桩承载力检测是可行的；锤重、落距、桩径、桩长、土阻力分布、桩侧及桩端土弹限、锤垫刚度和力脉冲宽度等因素对检测承载力均有较大影响。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。