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P-S曲线

P-S曲线的相关文献在1989年到2018年内共计82篇,主要集中在建筑科学、公路运输、一般工业技术 等领域,其中期刊论文79篇、会议论文3篇、专利文献19290篇;相关期刊58种,包括西安科技大学学报、岩石力学与工程学报、甘肃科技等; 相关会议3种,包括2014年全国工程勘察学术大会、第十三届全国桩基工程学术会议 、第十四届全国结构工程学术会议等;P-S曲线的相关文献由170位作者贡献,包括李金华、陈国政、何湘宁等。

P-S曲线—发文量

期刊论文>

论文:79 占比:0.41%

会议论文>

论文:3 占比:0.02%

专利文献>

论文:19290 占比:99.58%

总计:19372篇

P-S曲线—发文趋势图

P-S曲线

-研究学者

  • 李金华
  • 陈国政
  • 何湘宁
  • 刘伟军
  • 尚岳全
  • 张嘉易
  • 张旭梁
  • 李忠华
  • 牛腾飞
  • 王闪闪
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 施瑞; 王旭; 刘德仁; 蒋代军
    • 摘要: 散体材料桩处理软弱地基有较好的效果及经济效益,因而应用广泛.在深厚土层中,桩体无法穿透上覆软弱土层而达到下部较稳定层,此时增强体竖向承载力主要来自于桩体与桩周一定范围内土体的相互作用.散体材料桩竖向极限承载力大都采用桩周土体最大侧向约束力乘以被动土压力系数来计算,介绍了若干计算方法后,提出了一种基于天然地基土荷载-变形曲线的散体材料桩竖向极限承载力计算方法.该方法是假定桩周土体侧向变形达到某一既定值时,该值在天然地基土荷载-变形曲线上对应的土压力值即为桩周土对桩的最大侧向约束力.考虑到成桩作用对土体的强化作用,引入系数λ,表征桩周土体较天然土体的强化程度.考虑到地基土的成层性,推荐采用旁压试验(PMT)或扁铲侧胀试验(DMT)获取荷载-变形曲线.%With the good results and economic benefits,the granular column is widely used in the soft foun-dation treatment.Considering that the pile body is unable to penetrate the upper soft soil layer and reach the lower stable layer in the thick soil layer,the vertical bearing capacity of reinforcement mainly comes from the interaction between pile body and pile circumference within certain scope.Generally,the vertical ultimate bearing capacity of granular column is calculated by multiplying the maximum lateral binding force of pile circumstance body by the coefficient of passive earth pressure.After introducing several com-putational methods,the author will put forward a kind of computational method for the vertical ultimate bearing capacity on the granular column on the basis of the foundation soil load-deformation curve of natu-ral earth.In this method,it is supposed that the lateral deformation on the pile circumference body has reached a certain value,at this moment,the pressure value exerted by the certain value on the natural foun-dation soil load-deformation curve is called as the maximum lateral binding force on the pile body exerted by the pile circumference soil.In consideration of the reinforcement effect on the soil body exerted by pile, the reinforcement degree between the pile soil and natural soil body will be embodied by the incoming coef-ficients λ.In view of the foundation soil stratification,it is recommended to carry out the pressure-meter test (PMT)or flat dilatometer test (DMT)to get the load-deformation curve.
    • 李丹; 王吉霖; 谭玄; 汪洪平
    • 摘要: In order to discuss stress characteristics and moving tendency of cushion of the concrete -cored DCM pile foundation in soft soil foundation,the concrete-cored DCM pile reinforcing soft soil foundation pile group com-posite foundation of indoor model test was carried on.By monitoring the settlement of composite foundation under rating load,the pile top, the bottom of the pile and soil between piles at different positions of the change of the stress distribution to load-bearing characteristics of composite foundation is discussed, and the surface of the soil around the A pile top is embedded with markers,analyzed the cushion material moving trend and settlement law of soil between piles.The experimental results show that the initial loading of the load is carried by the pile while the composite foundation under upper load.Due to the adjustment of the cushion,the stress ratio of pile soil in the top of the pile is increasing gradually, after peaking the ratio decreases until stabilized.The settlement curve(P-S curve)of the composite foundation under the upper load is a slow variation;The cushion is moved to the center of the piles,the horizontal displacement and vertical subsidence of the soil are the trend of the near and far decrea -sing.The research results provide useful reference for engineering practice.%为了探讨混凝土芯水泥土搅拌桩群桩基础在软土地基中的受力特征,以及褥垫层的移动趋势,进行混凝土芯水泥土搅拌桩群桩复合地基加固软土地基的室内模型试验.通过监测分级荷载作用下复合地基的沉降和桩顶、桩底以及桩间土不同位置的应力分布的变化来探讨复合地基承载特性.对桩顶平面处A桩周围土层表面埋设标志物,分析了褥垫层材料的移动态势和桩间土体的沉降量的规律.试验结果表明:复合地基在上部荷载作用下,加载初期是由桩来承担大部分上部荷载;由于褥垫层的调节作用,桩顶面处的桩土应力比逐渐增大,达到峰值后比值有所减小直到趋于稳定.混凝土芯水泥土搅拌桩群桩复合地基在上部荷载作用下的沉降曲线(P-S曲线)为缓变型;褥垫层向群桩所围成几何图形的中心移动,桩周土的水平位移和竖向沉降都以桩为中心呈现由近及远不断减少的趋势.研究结果为工程实践提供了有益的参考.
    • 张想军
    • 摘要: 通过FLAC3D对竖直的圆桩进行建模并且进行数值模拟分析,在对桩建模时根据所处土层的不同而进行分段建模,本桩是圆形桩,所以建模时首先根据建模类型进行建模,用圆柱体外环绕放射状网格,初始FLAC3D默认的是创建四分之一的土体网格并进行镜像得到另外一半,所以研究的应该是桩跟土体网格的二分之一;并且在土体与桩之间应该建立接触面便于加载力.对各个土层和桩进行赋值,对赋值后的土层和桩进行初次的检测不平横后进行对桩的加载,通过对桩进行不同力的加载来观察土壤的周围土体的变化和桩的受力变化,通过逐级加载从中提取桩的侧摩阻力并且根据力平衡可知桩端的阻力,通过该计算可以更加精确的设计桩的尺寸和长度.并且可以提取桩的P-S曲线和桩的轴力曲线和桩侧摩阻力曲线以便于能够更加直观的去分析桩的受力.
    • 吴争光
    • 摘要: 由于水平荷载作用下桩土相互作用的复杂性,准确分析桩基水平承载力特性往往较为困难。基于某水平桩现场静载试验,采用有限元软件ABAQUS对试验区单桩进行数值模拟,采用弥散开裂模型模拟混凝土受力性状,用埋入单元模拟混凝土中的钢筋,计算得到位移曲线和桩身弯矩分布曲线并与试验值比较,结果表明:有限元计算P-S曲线与实测P-S曲线表现出较好的吻合性,在临界荷载之前有限元计算结果较实测值偏大;有限元计算与实测弯矩沿桩身分布较为吻合,最大弯矩点位置位于泥面以下1/5桩长范围内,反弯点大致位于深度8~12 m处。%It is difficult to analyze the lateral bearing capacity behavior of pile foundation accurately, for the interactive mechanism of pile-soil system is quite complex under the lateral bearing capacity. Based on field test of a lateral loaded pile, we carried out the numerical simulation on single pile with finite element software ABAQUS. Constitutive model of concrete smeared cracking was adopted to simulate concrete of pile, and the embedded element was used to simulate rebars in concrete. Calculated bending moment of the pile on different height and the deformation results were compared with experimental results. Simulation results show that:the numerical P-S curve has some difference with the experimental P-S curve, but the change rule meets well with the experimental result, the major difference occur at the stage before the critical load;the numerical bending moment meet well with the experimental results. The position of maximum bending moment is located about 1/5 of the pile length below mud line, and the inflection point is located at the depth about 8~12 m.
    • 李金华; 朱海西; 宋涛
    • 摘要: 通过现场预应力锚索拉拔试验,得出了黄土地层中预应力锚索的P-S曲线.研究了不同预应力锚索荷载-位移曲线函数模型对黄土地层的适应性;并对锚索的弹塑性位移进行了分析.结果表明:①在黄土层下,锚索锚固力主要受黄土力学性质的影响,锚固长度与极限拉拔力之间呈非线性增加关系;②指数函数模型能更好地拟合黄土地层预应力锚索的P-S曲线;③在黄土地层中采用塑性位移作为锚索的破坏标准更符合工程实际.
    • 戴吉祥; 司天琪
    • 摘要: 为研究花纹钢管与混凝土间的粘结滑移性能,进行了9个花纹方钢管混凝土试件的推出试验.通过测量荷载、加载端和自由端的钢管与混凝土间相对滑移,得出了试件受荷载过程的P-S曲线.通过对试验曲线的研究分析,结果表明花纹钢管对粘结强度有显著提高作用,为花纹钢管混凝土粘结强度的研究和应用提供依据.
    • 金淑君
    • 摘要: 由于水平荷载作用下桩土相互作用的复杂性,准确分析桩基水平承载力特性往往较为困难.基于某港口挡潮闸工程水平承载桩静载试验,采用有限元软件ABAQUS对试验区单桩进行数值模拟,混凝土采用弥散开裂模型模拟混凝土受力性状,用埋入单元模拟混凝土中的钢筋,计算得到位移曲线和桩身弯矩分布曲线并与试验值比较,结果表明:有限元计算P-S曲线与实测P-S曲线有一定误差,但变化规律与实测表现出较好的吻合性,在临界荷载之前有限元计算结果较实测值偏大;有限元计算与实测弯矩沿桩身分布较为吻合,反弯点大致位于深度8~12m处.
    • 王晓燕
    • 摘要: 通过预埋荷载箱法在四矿储装运系统实际工程中的应用,阐述预埋荷载箱法静载试验方法及原理,分析预埋箱法特点。进行预埋荷载箱法桩基础承载力测试,并对试验结果进行分析。为验证与优化桩基础设计提供有效数据,具有较好的现实意义。
    • 罗旭; 李建峰
    • 摘要: 合理地确定地基承载力是基础设计中一个重要的内容,目前岩石地基载荷试验被认为是确定地基承载力比较可靠的方法,可以更好地帮助设计单位准确、经济地确定桩端持力层.湘潭某广场包括了大量的建(构)筑物,其地基承载力的取值问题对该场地建设将至关重要,通过对该广场人工挖孔桩进行深层平板载荷试验和桩端岩石地基载荷试验,得到了6个试验点的极限荷载取值和与之对应的沉降量,为该场地地基承载力计算提供了数据支撑.
    • 曹文鼎
    • 摘要: PhotoShop是Adobe公司推出的一款经典的图像图形处理软件,有着强大的编辑图像和绘图绘画的功能.尤其是对于图像的后期调色处理它更可以说是这个领域软件的佼佼者.说到PS中的后期调色,就不得不提起它自带的一个调色系统的功能-曲线.曲线命令有着“后期之王”的美誉,所以曲线对于图像的后期颜色处理重要性也就不言而喻了.
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