多节挤扩支盘灌注桩在高层建筑中的应用

分析了支盘的受力特点及多节挤扩支盘桩在成桩过程中的影响因素、施工要点,并对比其经济价值.结合工程实例,介绍了在高层建筑的桩基施工中采用多节挤扩支盘灌注桩的施工技术.     

南通大学图书馆挤扩多支盘桩的施工技术

针对在粉质粘土中进行挤扩多支盘灌注桩施工难度大,且在南通地区尚无先例的问题,制定了合理的施工工艺流程.从桩孔定位、钻进参数选择、孔深控制、泥浆性能参数、灌注混凝土高度控制等方面说明了挤扩多支盘桩在这种地质条件下的施工技术要点.通过采取各项有效措施,从技术上保证了成桩质量.施工结果为在南通地区的地质条件下实施挤扩多支盘灌注桩施工提供了有益的参考价值.     

南通大学图书馆挤扩多支盘桩的施工技术

针对在粉质粘土中进行挤扩多支盘灌注桩施工难度大,且在南通地区尚无先例的问题,制定了合理的施工工艺流程.从桩孔定位、钻进参数选择、孔深控制、泥浆性能参数、灌注混凝土高度控制等方面说明了挤扩多支盘桩在这种地质条件下的施工技术要点.通过采取各项有效措施,从技术上保证了成桩质量.施工结果为在南通地区的地质条件下实施挤扩多支盘灌注桩施工提供了有益的参考价值.     

多支盘钻孔灌注桩应用实例分析

结合周口市电业局调度通信及综合试验楼工程实例,对多支盘钻孔灌注桩做了简要的分析,探讨了多支盘桩设计、施工、注意事项及应用该桩型取得的经济效益。     

多支盘钻孔灌注桩承载力与桩身结构设计

分析了多支盘钻孔灌注桩的工作性状和承载力计算 ,在此基础上探讨了多支盘钻孔灌注桩的适用条件及支盘直径与高度、支盘净距、桩长等结构的设计思路     

浅析挤扩支盘桩的设计

挤扩支盘桩是混凝土灌注桩中的一种新桩型,其桩体由主桩、若干个承力盘和数对分支组成。与普通混凝土灌注桩相比,由于充分发挥了桩土共同承担上部荷载的作用,挤扩支盘桩的承栽力高,沉降小。本文介绍了支盘桩的特点、受力机理、设计方法及施工工艺流程,使设计和施工人员能对这种新桩型有初步了解,便于在工程实践中应用。     

挤扩支盘桩的设计与施工研究

挤扩支盘桩是混凝土灌注桩中的一种新桩型，其桩体由主桩、若干个承力盘和数对分支组成。与普通混凝土灌注桩相比，由于充分发挥了桩土共同承担上部荷载的作用，挤扩支盘桩的承载力高，沉降小。本文介绍了支盘桩的特点、受力机理、设计方法及施工工艺流程，使设计和施工人员能对这种新桩型有初步了解，便于在工程实践中应用。     

挤扩支盘桩的设计与施工研究

挤扩支盘桩是混凝土灌注桩中的一种新桩型,其桩体由主桩、若干个承力盘和数对分支组成.与普通混凝土灌注桩相比,由于充分发挥了桩土共同承担上部荷载的作用,挤扩支盘桩的承载力高,沉降小.本文介绍了支盘桩的特点,受力机理、设计方法及施工工艺流程,使设计和施工人员能对这种新桩型有初步了解,便于在工程实践中应用.     

Matlab图像处理技术研究单支盘桩工作机理

挤扩支盘灌注桩是在直桩的基础上,通过在适宜的土层加设承力盘而形成的一种变截面桩。目前,理论上对支盘桩的研究尚不够成熟,对其荷载的传递特性和承载机理等方面的问题存在不同见解。进行单支盘桩的模型试验,其荷载-沉降关系表明单支盘桩的前期沉降较小;运用MATLAB图像处理工具箱,编制图像分析程序,处理试验过程中拍摄的照片,得到模型桩周围土体的变化情况,根据土体变化,分析支盘桩受力情况,结果表明,支盘桩工作过程可分为三个阶段:桩侧摩阻力承载大部分荷载阶段、支盘承载大部分荷载阶段、支盘下土体发生剪切破坏后桩端阻力承载大部分荷载的阶段。     

不同成桩工艺对支盘桩承载性能影响的模型试验研究

介绍了新型变直径灌注桩——挤扩支盘桩和旋扩珠盘桩的工作原理、主要优缺点.设计了模拟挤扩和旋扩成盘的模型试验方案并进行了一系列的模型试验,根据试验结果分析了新型变直径灌注桩在承载和抵抗变形方面与普通等直径桩相比的优越性,同时还比较了挤扩和旋扩这两种不同施工方法对变直径桩承载力和变形的影响,讨论了它们在荷载传递上的区别.研究表明,挤扩成盘时由于施工期间挤密盘周土体使盘的承载力高于旋扩成盘的承载力,从而使挤扩支盘桩盘的承载作用大于旋扩珠盘桩的承载力,同时前者盘的作用也要明显大于后者,因此在设计和施工时应充分注意各自的特点.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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