浅谈公路不良地基处理措施

介绍了公路工程中不良地基的加固处理方法,指出只有根据不同的地基采用不同的处理措施,才能使地基得到最佳的承载效果。     

大型非锚固原油储罐地基材料选用与应力分布规律研究

建立了大型非锚固原油储罐三维空间非线性有限元模型,采用罐底和地基材料接触单元的方法替代罐底和地基材料弹性杆单元的方法模拟罐底和地基材料的接触力。以一台新建15×104m3储罐为分析对象,分析了储罐采用不同地基材料以及采用不同地基材料不同分布的情况下,壁板、开孔边缘和大角焊缝应力分布规律。为大型原油储罐应力分布最优化,地基材料的排布和选用提供了理论依据。     

复合地基的工程应用分析

由于地质条件的不同，建筑地基的处理也不相同，文章以具体实例分析了复合地基在工程中的应用情况，针对不同地基提出了不同的处理方法。     

液化地基常见处理方法及工程案例

液化地基给城市市政建设带来不同程度的危害,严重影响了人们的正常生活。简述了液化地基的判别方法,重点介绍了液化地基的处理方法及优缺点,并举例说明了液化地基处理方法的选择。     

复合地基工程理论研究回顾与展望

复合地基的理论与应用是当前土木工程中比较活跃的研究领域。近十多年来,复合地基技术得到了较大的发展。由于复合地基中设置的增强体不同,因此,各类复合地基的承载机理也不完全相同。本文综述了复合地基的发展和研究现状,指出了复合地基存在的主要问题。     

高速铁路地基刚度的合理取值范围

利用动力有限元 ,通过对地基的不同刚度值对轨底动应力、基床表层动应力衰减规律的研究 ,并结合已有的不同路堤高度和地基变形情况下的地基临界刚度值 ,提出了高速铁路地基刚度的合理取值范围     

湿陷性黄土区不同复合地基处理效果探究

在进行路基施工时,需要合理进行施工设计,采用多种地基处理方法,以消除黄土湿陷性。本文总结分析了湿陷性黄土区不同复合地基处理方法,并依托宝兰客运专线天水南站工程采用的不同地基处理措施及参数对复合地基的承载特性和沉降变形的影响效果进行了分析和总结。     

软土地基上的路基施工技术探析

在软土地基上的路基施工过程中,若对软土地基处理不好将导致路基失稳或沉陷。本文详尽阐述了软土地基的处治措施及软土地基上的路基施工方法,通过对软土地基不同处治措施和路基施工方法的分析,提出了软土地基上路基施工关键点,对工程实践中软土地基的处治及软土地基上的路基施工有一定的指导意义。     

黄土地基的湿陷机理及其地基处理方法

为了深入分析黄土地基的湿陷机理及其地基处的理方法,分析了黄土的湿陷机理和影响黄土湿陷性的因素,并对在不同的地区,根据不同的地基土质和不同的结构物,湿陷性黄土地基处理应选用不同的处理方法进行分析。结果表明:影响黄土湿陷系数的因素是天然含水量和干密度。因而,在湿陷性黄土地区修建房屋若采用简单地基处理的浅基础形式,随着使用年限的增加,大部分建筑物或构筑物由于地下管网漏水或雨水沉积、地基长期泡水等原因会引起地基湿陷,导致基础出现不均匀沉降,使上部结构发生倾斜,影响建筑物的正常使用。     

一种经济的软弱地基处理方法

软弱地基是一种不良地基,因此在软土地基上修建建筑物,必须重视地基的变形和稳定问题。目前,针对软弱地基的不同构成有很多不同的处理方法,本文结合作者自身的工程实践,对用松木桩处理软弱地基的问题作一些探讨。     

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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