某地铁车站围护结构设计

目前地下连续墙在大深基坑工程中应用越来越广泛。就南京地铁茶亭站围护结构的设计中,对钻孔灌注桩加内支撑与地下连续墙加内支撑的围护形式进行了比选,对基坑的稳定性进行了验算,对连续墙内力进行了计算。地下连续墙的计算方法可供类似基坑工程参考。     

有限元数值分析在地下连续墙中的应用

为了研究高层建筑基坑施工中采用逆作法时建筑结构中地下连续墙的受力特性．文章结合工程实例，采用有限元分析软件ANSYS，重点对基坑施工中的地下连续墙进行了各种工况下的有限元数值分析，计算了地下连续墙的内力和位移．根据现有工程经验，用弹性地基杆系有限元法计算多支撑地下连续墙的内力，能反映墙体内力的变化，能满足工程设计要求．但由于影响墙体变形的因素复杂，会影响地下连续墙内力计算的准确性，根据经验对最终计算结果进行调整是十分必要的．     

深浅交替地下连续墙的变形研究

深浅交替地下连续墙作为一种新的地下连续墙形式,其应用较其他形式的地下连续墙更为广泛,研究其在基坑工程中的变形规律具有重要意义。通过对某基坑工程中深浅交替地下连续墙的变形性状进行监测,将不同深度处的水平位移以及地下连续墙墙顶沉降量与时间关系进行分析,采用模拟软件进行支护计算,得到各个开挖工况下深浅交替地下连续墙墙体竖向和水平位移的变形规律。     

盖挖逆作法地铁车站施工中地下连续墙竖向沉降的可靠性研究

将适用于桩基的Poulos弹性理论引入对地下连续墙的沉降计算研究,并结合现阶段对地下连续墙竖向沉降的研究成果,编制了地下连续墙竖向沉降的有限元程序．在此基础上将Monte Carlo模拟法与有限元技术结合,计算地下连续墙竖向沉降对于不同控制值的失效概率．工程实例计算表明,计算所得的结果较符合工程实际．     

深基坑围护中地下连续墙变形的解析计算

旨在更准确地研究深基坑围护中地下连续墙的变形,根据地下连续墙的受力特征,运用弹性薄板理论法对地下连续墙在基坑开挖中的侧向变形进行了分析,导出了其侧向变形的解析计算公式。最后通过工程实例进行了比较分析,结果表明计算值与实测值较为吻合,弹性薄板理论法能考虑空间作用的影响,可为地下连续墙的设计施工提供理论依据。     

支扩式地下连续墙的内力和土体变形计算

本文阐述了作为支护式的地下连续墙，可采用竖向弹性地基梁的基床系数进行了计算的方法和变形分析，提出了内力计算的主要荷载和基本计算公式，可应用于与高层建筑基础工程地下连续墙作为支护结构时的设计和施工计算。     

地下连续墙施工技术研究

地下连续墙是一种基坑工程的支护结构,具有防渗止水和基坑挡土支护的双重作用,在深基坑的支护工程中被广泛使用。该文通过对地下连续墙施工技术的研究,进一步了解和探讨地下连续墙的施工方法,以及地下连续墙在基坑支护方面的应用,积累地下连续墙施工的质量控制方法和施工技术经验,为今后类似工程中的地下连续墙施工提供施工方法选择的依据和经验。     

基坑开挖对T型地下连续墙水平位移的影响

T型地下连续墙是一种新型自立式基坑支护结构,结合新沟河延伸拓竣工程,通过数值模拟和现场监测,分析了基坑开挖对T型地下连续墙侧向变形的影响,将数值分析结果与规范方法计算结果、现场开挖实测数据进行对比分析,研究了T型地下连续墙在基坑开挖至稳定期间墙体水平位移变化规律,验证了T型地下连续墙用于该工程中的合理性。结果表明,相比传统悬臂式地连墙,具有增加墙头抗弯刚度,减小墙顶位移的优点,有利于保证基坑工程的安全与稳定。     

格栅状地下连续墙现场试验与基坑支护性能分析

相比于泥浆成槽法的传统实腹式地下连续墙,采用高频振动沉模成孔方式的格栅状地下连续墙的成墙效果和支护性能研究尚处于空白。首先,开展了软土地质条件下格栅状地下连续墙的成墙现场试验研究,继而采用有限单元方法计算得到了背景工程开挖全过程的墙体变形、地面沉降和坑底隆起等支护性能指标变化规律;分析了嵌固深度、地面超载、支撑截面等参数上述指标的影响性特征。结果表明,格栅状地下连续墙的墙身混凝土浇筑质量能够满足强度和抗渗性能要求;其支护性能与传统的钻孔桩和地下连续墙相近,仅截面刚度存在差异,因此可按照桩、墙结构进行设计;为完善结构构造和结点体系,应进一步开展试点工程的应用性研究。     

地源热泵型地下连续墙内埋管换热器优化设计

根据地下连续墙内埋管换热器传热模型及埋管内流体温度场提出了地下连续墙内埋管换热器换热能力和出水温度的计算方法,并基于正交分析给出了上部建筑负荷最大时地下换热器的换热量及出水温度最高值的回归公式.在此基础上,根据出水温度最高值、单组埋管长度以及地下连续墙单幅宽度等限制条件提出了地下连续墙内埋管换热器的优化设计方法,并以上海自然博物馆地下连续墙内埋管为例进行了计算.分析表明,该优化设计方法计算简便,容易为工程设计人员所接受.     

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.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

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.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

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