桩结构

Based on the large-scale model test on soil-pile-structure interaction, as a part of the project financed by nature science national fund, analysis of soil-foundation -structure dynamic interaction (NO.50278033), some issues about modeling of soil-structure interaction system are discussed in this thesis. These issues mainly include simulation of soil infinity, selection of dynamic constitution model of material, simulation of the changing status nonlinearity on soil structure interface, meshing, using of symmetry principle and so on.

结合国家自然科学基金课题《地基-基础-上部结构相互作用体系动力特性研究》(NO.50278033)，以大比例桩筏基础框架模型试验为基础，运用通用有限元软件MARC，首先对土—框架结构动力相互作用体系进行有限元计算建模的一些问题作了研究，主要包括粘—弹性人工边界的施加、土域范围的选取、材料本构模型的选用、土体与结构交界面上状态非线性的模拟、网格划分以及对称性的应用等。

The unballasted track by the pile-plank structure is a relatively new structure.

桩板结构路基-无砟轨道结构是一种相对较新的结构。

For the structural design parameters of flat - slab beamless pile structure which can be directly used for the low embankment of soft weak subgrade of passenger dedicated line, the analyses are made for the all performance indexes of the structure under the static and dynamic conditions by using a space calculation model.

研究方法：根据相关规范和规定，分析了既有特殊路基和桥梁结构工程，研究了各种构造的优缺点，针对客专拟定可直接用于工程的软弱地基低矮路堤的无梁板式桩柱结构设计参数，采用空间计算模型分析该结构在静力和动力情况下的各项性能指标。

Research purposes:Through doing overall researches,it is proposed to adopt flat-slab beamless pile structure for low embankment of soft weak subgrade,which can be suitable for ballast and ballsatless tracks and control the structure s settlement with easy construction and low construction cost.

研究目的：通过全面研究，提出软弱地基低矮路堤采用无梁板桩柱结构，保证结构可适应有碴及无碴轨道，达到结构沉降可控，施工方便，造价经济的目的。

This is generally defined as being identical in the length to the width of the footing in the direction normal to the analytical plane. However, there is little knowledge about whether the results obtained from the historic method analysis are overestimated or underestimated, comparing with those obtained from the applicable values. So in this paper a new methodology considering the soil-pile dynamic interaction for sea warf has been imposed.

在总结理论的基础上，指出土-结构动力相互作用目前的发展水平与工程实用之间仍存在相当大的差距，理论与实际之间也还有距离，这是由于土-结构动力相互作用问题本身的复杂性，不同的计算方法都引进了一些假设和进行了不同程度的简化，以致不同方法给出的结构和地基反应存在有很大的差别，加之计算工作量大，试验验证也比较困难，所以在实际的抗震设计中考虑桩-土共同作用是有很大的研究意义的。

The formula calculating the first frequence of the bridge with the pile foundation is derived by using the Rayleigh Principle.

用Rayleigh法推导了桩基桥梁的第一自振频率的近似计算公式；在动力学效的原则下建立了桩—上—上部结构体系的等代简化模型，导出了动力等效嵌固深度l〓的计算公式，并与静力等效嵌固长度Z〓的计算公式进行对比分析，给出了静力公式的误差范围。

In addition, a pile cap must be designed for flexural shear and punching shear around the heads of piles and the base of columns.

此外，一桩帽结构必须为抗剪、冲切在头上、桩基础的栏目。

The reliability of sheet pile quays is analyzed with reliability theory for engineering structures in this paper.

根据板桩码头的特点，应用工程结构可靠度理论对板桩码头进行了可靠度分析。

In the process of overturning stability analysis of counterforted buttressed quay wall with crane rail bearer,we shall consider the stabilization moment caused by the force of cutting pile.

设置桩支承的起重机轨道梁的扶壁码头结构形式，抗倾稳定性影响分析中应该考虑截桩力的稳定力矩。

The in-water main piers of Sanmenjiang Bridge are elevated pile cap s that were constructed by steel hoisting box cofferdams.

三门江大桥水中主墩系高桩承台，采用钢吊箱围堰法施工，利用简易的型钢拉压柱作为吊箱的吊挂结构，将吊箱吊挂在钻孔桩钢护筒上，施工操作简便，降低工程成本，是一项值得推广和应用的施工技术。

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。