沈阳地区盾构下穿河流段管片上浮控制技术研究

盾构穿越河流段施工过程中发现,管片在脱出盾尾3~4环出现上浮。主要从管片受力、承压水、建筑空隙及同步注浆等方面进行研究并制定相关控制技术措施。经过分析,盾构在刚进入河流下坡段的理论建筑空隙为管片上浮提供了自由空间;盾构在下穿河流的过程中覆土的突然减小、受到向上的合力、为管片上浮提供了动力;同步浆液及注浆的形式造成管片的不稳定性。通过理论结合实际对管片上浮进行控制,保证了后续顺利施工。     

常规盾构隧道质量问题原因分析及防治措施

本文介绍了郑州地铁2号线广~新~国区间EPB盾构在全断面富水粉细砂层掘进中管片出现的一系列质量问题,并针对这些质量问题所采取的一系列补救措施及建议措施。     

软土地层盾构隧道管片上浮规律及控制研究

在采用盾构法施工的隧道中,管片上浮是经常会发生的现象,地层条件、同步注浆、盾构姿态等因素都会引起管片上浮,本文结合台州市域铁路某盾构区间隧道工程实例,分析了盾构管片上浮的规律,在台州软土地层中,盾构管片上浮较为明显,上覆较厚(3)1黄黏土的区段,盾构管片上浮量较大,在施工过程中,应使盾构机保持负姿态掘进,在上覆较厚(3)1黄黏土区段应采取降低盾构施工速度、控制盾构姿态、减小水泥砂浆水灰比、增大水泥用量等措施控制盾构管片上浮.     

某黄土盾构隧道管片上浮原因及控制技术研究

本文结合某黄土盾构隧道施工实例,通过对施工过程中管片上浮问题的总结,分析了黄土盾构隧道管片上浮原因,管片上浮主要受到黄土地层、地下水位、盾构机姿态和同步注浆的影响,并根据黄土施工地质特点,通过控制同步注浆参数、优化二次注浆方式、提升施工严谨性、控制盾构纠偏参数、增加管片姿态测量频数等控制技术,有效抑制了盾构隧道管片上浮趋势,可为类似盾构管片上浮控制问题提供一定工程经验。     

盾构隧道管片上浮原因分析及应对措施

地铁盾构施工时的管片上浮问题非常棘手,难以处理。本文依托长沙地铁盾构区间管片上浮的问题,从水文地质情况、盾构作业影响、管片后压浆等方面进行原因分析及研究,并针对性地提出了控制管片上浮的处理措施及施工对策。     

超大直径预制盾构管片自动化流水生产工艺研究

随着长三角区域高质量一体化发展目标的提出，核心城市基础设施建设不断加速，地下空间工程投入将持续加大。其中，盾构管片得到越来越多的应用，其生产工艺通常分为传统工艺和自动化流水线工艺。传统盾构管片制作多采用固定模台，耗费人力，占地面积大，效率较低；主流管片自动化流水线仅能满足地铁工程小直径盾构管片的生产需求，而对于城市公路隧道、跨江隧道等多车道大直径盾构管片生产工艺的研究仍然较少。本文针对超大直径盾构管片自动化流水生产进行工艺研究，其经济效益和社会效益显著，为国内外类似工程超大直径盾构管片生产实施提供了参考。     

侧压力系数对盾构隧道管片受力的影响

本文旨在以某地铁盾构隧道管片设计为背景,通过ANSYS有限元软件对不同侧压力系数情况下盾构隧道管片受力进行数值模拟,分析侧压力系数对盾构隧道管片受力的影响。     

地下水位高度对盾构隧道管片受力的影响

本文旨在以某地铁盾构隧道管片设计为背景,通过ANSYS有限元软件对不同地下水位高度情况下盾构隧道管片受力进行数值模拟,分析地下水位对盾构隧道管片受力的影响。     

水土分算与合算对盾构隧道管片受力的影响

本文旨在以某地铁盾构隧道管片设计为背景,通过ANSYS有限元软件对不同情况下盾构隧道管片受力进行数值模拟,分析水土分算与合算对盾构隧道管片受力的影响。     

探究管片生产技术现状及自动化创新发展

管片生产企业承担着整个盾构隧道建设工程质量保证和进度要求,然而国内管片生产企业发展的现状并不理想。本文从管片生产企业的技术现状及存在的问题出发,透彻地分析关于未来管片生产的技术、管理等多方面的规划,为实现管片生产自动化流水线式的操作提供建设性的意见,推进管片生产企业全面发展。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.     

Introduction of New Technology with a Sound Transition of the Input-Output Structure

We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.     

The Creation of the Office for National Statistics

A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.     

What helps? Women engineers' accounts of staying on

We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.     

论现代物流企业的发展观

物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。