桥梁工程转体施工主要技术研究

文章归纳了桥梁转体施工技术的概念和特点,介绍了桥梁转体施工技术的发展历程和国内外发展趋势,阐述了桥梁转体施工的技术要点,如水平转体法和竖向转体法中的工艺流程和质量标准。同时,文章以广西柳州市某立交特大桥为例,分析了球铰法转体施工技术的工程应用情况。     

非对称混合梁转体桥设计研究

转体施工作为一种成熟的桥梁施工工艺,能最大限度地减少桥梁施工对既有铁路线运营的影响,但我国目前施工的转体桥基本为主梁采用单一材料的对称结构,大跨度、大吨位的非对称转体案例较少.文章依托某非对称混合梁转体斜拉桥,建立了全桥杆系模型和钢-混结合段实体模型,通过对其转体阶段、成桥阶段、成桥十年阶段受力特点的分析,为类似工程的...     

浅谈"平面转体法"桥梁施工技术

结合几座“平面转体法”桥梁施工的经验,简要介绍“平面转体法”桥梁施工的应用范围和类型、特点,以及“平面转体法”桥梁施工的技术控制要点。     

跨既有铁路连续箱梁转体法施工技术 ——以大沽河特大桥为例

青连铁路大沽河特大桥一联(48+80+48)m连续箱梁跨越既有铁路,采用转体法施工工艺,本文简明扼要的介绍了该梁转体施工技术,对转体系统安装、梁段施工、转体等工序进行了阐述.     

转体T构梁段挂篮悬壁浇注施工上下转盘临时锁定技术

德安县共安大桥转体重量14510t、转动体长123m,是目前已转体的跨度最大、重量最重的公路预应力混凝土连续梁。其设计采用先挂蓝悬臂浇筑连续梁、然后平转,最后合龙成桥的施工方法。由于并置于同一墩柱上大吨位、大跨度双幅曲线连续梁桥先悬灌、后转体的施工技术尚无成熟经验可借鉴。本文结合江西省德安县共安大桥主桥的施工实例,针对连续梁悬臂浇注施工再转体的特点对上下转盘临时锁定技术进行了研究和总结,将对以后同类的桥梁建设提供一种思路。     

浅谈某跨铁路预应力混凝土桥转体施工质量控制

某跨铁路预应力混凝土桥施工跨度为71m+71m,转体总重量约为7083吨,采用自平衡体系的平面转体施工工法。文章对桥梁转体施工的施工工艺,转体施工测量放线,球铰加工安装、上转盘施工,现浇梁体支架搭设及堆载预压,试转体、正式转体施工等各主要环节质量控制进行了分析总结。     

浅谈某跨铁路预应力混凝土桥转体施工质量控制

某跨铁路预应力混凝土桥施工跨度为71m+71m,转体总重量约为7083吨,采用自平衡体系的平面转体施工工法。文章对桥梁转体施工的施工工艺,转体施工测量放线,球铰加工安装、上转盘施工,现浇梁体支架搭设及堆载预压,试转体、正式转体施工等各主要环节质量控制进行了分析总结。     

严寒地区跨多条高铁T构转体关键参数测试分析

目前,跨铁路桥梁采用转体法施工已成为首选。本文结合吉林市雾凇高架桥主桥20′墩处T构转体施工技术,为确保转体的顺利实施,介绍了转体前对纵向不平衡力矩、摩阻力矩、摩阻系数等参数进行测试方法,确定了转体平转姿态,对严寒地区类似工程提供一定借鉴经验。     

桥梁大吨位(100T)砂筒制作与检验

在工程施工中连续箱梁、简支箱梁及边跨现浇直线段多采用支架现浇施工方式,施工方案一般采用梁柱式支架,该支架须设置卸架设备,采用砂筒作为卸架设备之一,根据当今桥梁现有施工经验,砂筒承载能力仅达50T;但现在桥梁设计及施工中经常会碰到大吨位的砂筒作为常用卸架设备。     

桥梁转体施工关键技术研究及应用

转体施工作为桥梁建造的一项新技术,近些年在桥梁施工领域的应用范围不断扩大。本文针对于其技术原理及应用优势,结合实际案例,重点阐述转体施工的关键技术、力学试验、转体参数计算等内容,以丰富转体理论研究资料,为转体桥梁施工提供参考。     

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.     

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。     

浅谈大体积混凝土裂缝的控制

大体积混凝土的裂缝问题是实际工程中长期困扰工程技术人员的问题,其控制技术的研究是混凝土结构研究的热点问题,具有重大的学术价值和潜伏的工程背景。     

Supply Chain Strategies in the UK Fashion Industry—The Rhetoric of Partnership and Realities of Power

This paper focuses on the fashion industry, one characterised by issues such as dramatic shifts in the scale and power of major retail buyers in the market, the advent of retailer own brands, and the nature of sourcing and supply chain decisions, issues that are increasingly global in nature. The aim of this research is to explore the nature of relationships between UK high street multiple fashion retailers and their contracted suppliers, many of whom are entrepreneurial firms by most definitions of the term. Four core themes emerge from the literature and provide a framework for the research, namely, power, process, partnership, and people. The research approach was qualitative, and conducted over a period of twelve months. The paper ends with an agenda for future research.