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By means of field test for the pile of 15 meters length and MARC finite element analysis, this paper studies the bearing mechanism of the reinforced mixing pile, analyzes the law of load transfer and the percentage about cement-soil ring and reinforced concrete core under vertical load, analyzes the change law and interactive behavior about the pile's surface bearing and end bearing. In the end an experiential equation that can be used in Tianjin area to estimate the bearing capacity of single pile is proposed on the basis of test researches and finite element analysis.

分析了劲性搅拌桩在竖向荷载作用下的荷载传递规律及芯桩与水泥土的荷载分担比；分析了劲性搅拌桩在竖向荷载作用下桩侧摩阻力和桩端阻力随桩顶荷载的变化规律；分析了劲性搅拌桩在竖向荷载作用下桩端阻力及桩侧阻力的发挥性状与桩土位移间的关系及端阻力与侧阻力的荷载分担比。

In order to analyze the influence of filled metal particles on impact force for hydraulic pile hammer, analytical solution of mathematic model for pile hammer filled with metal particles considering effects of metal particles was presented. In the solution, lumped mass were used as metal particles, a spring was used as contact stiffness between metal particles and hammer body, different variable lumped masses were used as pile hammer, the ram and anvil, a spring and a dashpot were used as the anvil cushion and pile respectively.

为分析填充金属颗粒对打桩锤锤击力的影响，考虑填充金属颗粒的作用，用集中质量块表示填充的金属颗粒，用弹簧模拟金属颗粒与锤体相碰处的接触刚度，用不同的集中质量块表示桩锤、砧座和桩帽，用并联的弹簧、阻尼器表示锤垫，用弹簧表示桩垫，用阻尼器表示桩，建立了平衡方程。

Then, according to differential equation of pile displacement and algebraic equation of neutral plane, the depth ratio of neutral planeλis solved by semi-analytical method. In the calculation example, the influence of pile compressive modulus, pile length and compressive modulus of subsoil beneath pile-bottom on the parameterλis analyzed. Moreover, the range ofλis also calculated.

然后，根据桩体位移微分方程和中性面代数方程，应用半解析的方法求解了中性面深度比λ，由算例分析了桩体压缩模量、桩长和桩端土压缩模量三个影响因素的变化对中性面深度比λ的影响，及刚性桩复合地基中性面深度比λ的取值范围。

Vesic's solutions to cavity expansion that include cylindrical cavity expansion and spherical cavity expansion are introduced. Then cylindrical cavity expansion theory is applied to study compaction effect of pile driving in saturated soil. Based on the results of conventional triaxial tests, a trilinear curve model is used to simulate stress-strain curve of strain-softening materials. Meanwhile, trilinear curves are also used to simulate curves of volumetric strain, minor principal strain and major principal strain. By using elasto-plastic theory, analytical solutions to cylindrical cavity expansion in strain-softening soil are presented. According to the mechanism of statically pressed pile driving, compaction effect of pile tip can be viewed as hemispheric cavity expansion. Therefore spherical cavity expansion theory is applied to obtain the solutions to stress, strain, displacement fields and final pressure. Resistance force of pile tip is calculated to estimate static pressure.

介绍了Vesic关于圆孔扩张问题的解答，其中包括柱形孔扩张问题和球形孔扩张问题，并应用柱形孔扩张理论分析了饱和软土中的沉桩挤土效应问题；在常规三轴试验成果的基础上，采用三折线模型模拟具有应变软化性质的岩土材料的应力应变关系曲线，分析了在应变软化土体中沉桩时桩周土的位移场、应力场和应变场的变化，得到了解析解答；分析了静压桩的沉桩机理，并利用球形孔扩张理论，视桩端处的挤土为半个球形孔的扩张，分析了桩端处土的位移场、应力场和应变场的变化，并根据最终扩张压力计算出沉桩时的桩端阻力，可作为压桩力的估算。

On the base of the abave analysis,the first reinforce scheme is anti-slide pile to reinforceslope.Design and calculate anti-slide pile on theory of elasticity pile and rigidity pile.

针对上述计算分析的结果，提出边坡加固方案一：抗滑桩加固边坡分别按弹性桩和刚性桩对抗滑桩进行了设计计算。

A calculation method for the ultimate tip resistance of rock socketed pile was conducted. The geostatic stress of soil and rock was considered as homogeneous load on the tip plane of the pile, and then the force of the pile tip was decomposed into some simple forces. According to the theory of slipping line, the most dangerous point on the tip plane of the pile was confirmed, and the stress of the point was obtained according to Mindlin solution.

为求出桩端极限承载力的表达式，本文将嵌岩段以上岩土层自重视为作用在基岩半平面上的均布荷载，把桩端合力分解为相对简单的荷载作用于基岩平面上，利用滑移线理论并通过叠加的方法分析出桩端基岩破坏时的最危险点。

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。

Better numerical prediction of the distributions of shear forces and bend moment within the pile group has also been obtained with the consideration of many stochastic parameters such as the soil properties of sea warf, seismic properties, etc. And then we analyze the dynamic nonlinear seismic pile-soil interaction in sea warf as an example to apply the software of ANSYS to the assessment of the dynamic interaction of soil-structure in the harsh situation of random earthquake. And then we denoted that the soil-pile interaction is too difficult to be expressed in equations because the non-linear interaction between soil and pile.

5桩基由于其本身的优点得以在海洋码头结构中大量的运用，但是海洋码头结构在海洋环境下受多方面的影响，土与桩体的相互作用关系很难清楚的表达，由于影响因素的多样性及复杂性，以及它们与桩基性状之间的非线性和非确定关系，使得关于桩基性状的各种理论解答还不能采用简便的表达式以反映其复杂多变的机理，尤其是难于反映施工及环境因素对桩基性状的影响，而且如何发挥桩基的技术经济效益和如何合理的确定桩的极限承载力，也是一个技术难度很大的问题。

It introduces the development of anchor-pile support skill,discusses the development and actuality of anchor-pile support theory principle, and brings forward the problems existed in anchor-pile support theory ,so as to promote the application of anchor-pile support skill.

介绍了锚杆支护技术的发展，对国内外锚杆支护作用机理研究的发展与现状进行了探讨研究，提出了锚杆支护理论研究中存在的问题，以促进锚杆支护技术的应用。

The residual stress in bent pile can be ignored. The curvature of batter pile has important influence on additional moment to bent pile under vertical load on top. When the radius of curvature on the upper segment of pile is small, the additional moment can not be ignored.

得到以下结论：桩体由于施打而发生的弯曲在桩体中产生的残余应力可以忽略不计；桩顶竖向荷载作用下桩身的弯矩同桩的偏斜曲线有重要关系，桩顶处的曲率较大时，桩身的弯矩在工程中是不能忽视的。

"Please accept this talisman as a token of our thanks."

请收下这个护身符以表达我们的感谢。

If I have that magic, I will be more acceptable in the society.

如果我拥有那种魔法，我将更加被这个社会所容纳。