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During design of pile raft foundation, reacting force raft board bottom is very important,and it not only suffers the stiffness influence of upper structure,and the degree of solidifying that still suffers the constantly change of base soil along with the increase of time reaches and the influence that time efficiency of base stiffness.

桩 -筏基础设计时,筏板底部的地基反力的确定是十分关键的,它不仅受到上部结构的刚度影响,还受到地基土的固结度随着时间的增长而不断变化及地基刚度的时效性等的影响。设计时其计算模型的建立又和桩-筏的刚度有关。根据地基土在桩-筏基础的作用下的实际受力状况,结合工程实例,提出桩-筏基础设计时简化计算的 3种模型及 3种型使用时的注意事项

Accord-ing to engineering example,the load condition of pulling resistance pile design,pile capacity design of floatage resistance pile,pile body texture design of floatage resistance pile,monolithic stability of grouped piles foundation,floatage resistance per unit area,c...

依据工程实例对抗拔桩设计荷载条件、抗浮桩单桩承载力设计、抗浮桩桩身结构设计、群桩地基整体稳定性、单位面积抗浮力、抗拔桩抗裂分别进行了阐述,以及抗拔桩设计中应考虑的问题进行了论述。

Based on the previous viewpoints and the testing project of Shanghai Metro, the research on the theory and design method of the secant pile wall composite structure used as permanent structure is studied in the paper.

基于这样的观点,本文结合上海地铁某咬合桩试验段工程,对咬合桩作为永久结构使用的咬合桩复合结构设计理论和方法进行了研究。

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。

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。

In this method the random variables that mainly affect the response characteristics of offshore piles were selected and sampled. The result of this simulation is good and it shows that the neural network method can be helpful to the controlling of warf pile's designation.

在此基础上提出了地震作用下码头桩-土相互作用的神经网络控振方法,分析了地震作用下的海洋港湾码头桩-土结构,同时,考虑场地土的不确定性和地震作用的随机性(地震烈度、地震作用方向、不同地震波)、结构-桩-土相互作用等因素的影响。

With plain strain finite element method,the characteristic of double-row pile of excavation of foundation pit in soil clay is studied.

采用平面应变有限元方法研究了软粘土地基基坑开挖双排桩支护结构的性状,重点分析了桩土界面特性、前后排桩间距等因素对支护结构的内力和变形的影响。

According to the characteristics of large span structure design, such as big diffrence of collumn force, large span and spacious roof, week linkness of different parts and large displacement of bearing, spacil structure methods such as different types of concrete pile with different length, suitable joint and bearing are adopted to achieve the economical and safe demand

提要]针对西北农林科技大学体育馆类大跨度空旷建筑结构的设计特点,如柱底内力差别很大、上部结构空旷、各部分之间的连接较弱、屋盖结构跨度大、支座位移大等,采取差异化的桩型和桩长,适当分缝,合理配置支座等有效的结构措施,达到既安全可靠、又经济性好的目的。

Structure computation of sheet-pile wall is a major part in design of sheet pile bulkhead, which is a main form of quay.

板桩码头是一种主要的码头结构形式,其中板桩墙结构计算又是板桩码头的一个重要内容。

According to fully expounding the geologic condition of the location of the bridge and the structure of pile foundation and the research level of the bearing capacity of group pile foundation in the present, the paper analyzes the mechanism of group effect and the impact on bearing capacity of pile foundation. The finite-element numerical analyses and self-balanced method are adopted in the present paper to calculate and analyze the vertical bearing capacity of pile group of north main-tower is cleared up and analyzed.

在全面阐述桥位区工程地质条件和桩基础组成结构以及群桩基础承载力研究现状的基础上,深入探讨了群桩效应及其对桩基础承载力影响的机理,分别采用自平衡试桩测试技术和三维土工有限元模拟方法研究了单桩竖向承载力问题,通过对试验和计算结果的整理、对比分析,确定了能够客观反映地基土工程特性的地基土计算参数。

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With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务,乐队在现实中树立了重要的影响。

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不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐,因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。

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关闭眼睛,深呼吸,一切不再是梦想,犹如。。。。。。