查询词典 pile-planking

Experimental results show that: bearing capacity of JPP is thirty percent higher than that of cast-in-place pile which has the same length and diameter with JPP. The deformation of JPP is controlled by core pile; axial force distribution of PHC is different with soil-cement; and their axial force ratio in same section is their elastic modulus ratio. Distribution of inner and outer friction resistance is similar; and the inner friction is about 1.62 times of the outer one; it is about the ratio of JPP diameter and PHC diameter. Furthermore, the relation between friction resistance and relative displacement is similarly hyperbolic; and the relation between dip resistance and displacement is also hyperbolic.

试验结果表明，JPP桩与同桩长、同桩经灌注桩相比承载力高30%以上；JPP桩变形由芯桩控制，管桩轴力分布与水泥土轴力分布规律不一致，但同一截面上管桩和水泥土的轴力比值约为其弹性模量的比值；内外摩阻沿桩身的分布规律类似，内摩阻是外摩阻的1.62倍左右，约为JPP桩直径和管桩直径的比值；桩侧摩阻力与桩土相对位移近似双曲线分布，桩端阻力和桩端位移也近似双曲线分布。

The new ideas from this paper: using mechanics principle study of soil, create a practical test to prove that it could change the physical mechanics character of base soil completely, reducing distortion, improving strength, and eliminating wet or sinking of base soil by seal extrusion during hole formation process at certain replacement rate; it could strengthen the loessial soil base to high bearing capacity to standard value of 300 to 400kPa through seal extrusion to hole formation technology together with rammed cement soil pile. Some value of the parameters adopted by bearing capacity calculation of the composite base of rammed cement soil pile with seal extrusion to hole formation exceeded the criteria of 'Technical Regulation on Building Ground Treatment'.(JGJ79-2002) This technology meet the design requirements and save investment.

本课题的创新点：1 利用土力学原理进行研究及理论推导，并经实践：证明了在置换率为某一定值的情况下，在成孔过程中通过挤密作用可以从根本上改变地基土的物理力学性质，使地基土的变形减小，强度提高，湿陷性消除；2 挤密成孔工艺与夯实水泥土桩的组合，可使低强度的湿陷性黄土地基变成高强度的复合地基，其承载力特征值可达 300~400kPa；3 挤密成孔法夯实水泥土桩复合地基承载力计算所采用的有关参数取值范围超出了《建筑地基处理技术规范》JGJ79-2002 中的有关规定；4 在节省投资的前提下，解决了地基高承载力、低变形及黄土湿陷性问题，达到了设计要求。

Screw pile ; steel pipe pile ; ultimate bearing capacity ; foundation design ; construction

螺旋桩；钢管桩；极限承载力；基础设计；施工

The time-domain response model of flaw long screw drill and pour pile was established based on the damped wave equation of pile-soil interaction system.

从桩-土系统共同作用的波动阻尼方程入手，建立了成层土中缺陷长螺旋钻孔灌注桩的时域响应模型。

Focused on how to improve the portable performance of the screw pile driver system, a series of research work was done based on the research institution of interaction of pile and soil during piles being driven into soil and bionic reducing adhesion and resistance.

在充分考虑我国防汛抢险桩机研究现状的基础上提出了新型的防汛抢险螺旋桩机系统，然后结合国内外沉桩过程桩—土作用研究现状和仿生防粘减阻研究现状，围绕&如何降低沉桩设备动力消耗，提高防汛抢险螺旋桩机系统的便携性和机动性&展开了一系列的研究工作。

But some problems of designing including failure model of soils, the design of shape of screw piles, the computation of ultimate load for single screw pile or screw pile group, the reasonable ratio of diameter of lamina to pitch of screws or the distance of laminas were seldom researched.

但目前对于极限荷载条件下螺旋桩基础的地基破坏模式、桩型设计、单桩和群桩极限承载力的计算，以及合理的螺距与叶片直径比等问题的研究尚少，有待进一步完善。

Through practical example, this paper introduces construction technique of lime sand pile, discusses preparation and procedure of on-the-spot construction and analyzes advantages of lime sand pile construction .

通过实例对石灰砂桩的施工工艺进行了介绍，论述了施工现场的准备工作及施工工序，分析了石灰砂桩施工的优点。

We study a reasonable method to analyze the force between the pile and surrounding rock, so that the design of anti-sliding pile is secured, precise, economic, reasonable, quick and credible.

从而探讨出一种研究抗滑桩与围岩间作用力的合理方法，使抗滑桩设计具有安全、准确、经济、合理、快速、可靠等突出优点。

In the point of historical view, the bearing capacity of rock-socketed pile is considered mainly being related to the underlying rock of the pile bottom.

以其承载力高、沉降小、群桩效应弱等特点极大地满足了高层建筑，桥梁工程等大型建构筑物的需要。

In design of anti-sliding pile, the most foundation and most important problem is how to determine the distribution feature of the interaction force between anti-sliding pile and surrounding rock under pushing force of sliding body, that is the distribution feature of sliding pushing force and remnant resistant sliding force.

在抗滑桩设计中一个最基本、也是最重要的问题是确定抗滑桩在滑坡体推动下，桩身与周围岩土体之间作用力的分布特征，即滑动面以上滑坡推力与剩余抗滑力的分布特征。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。