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1.
在道路桥梁施工中,预应力技术是常用的施工技术,其施工质量的好坏会对施工的整体质量和效率构成直接的影响。文章对道路桥梁施工中预应力施工技术进行了概述,并对道路桥梁中预应力施工技术应用情况进行了分析,制定了预应力施工质量的完善对策,对预应力施工技术应用要点实行了探究。  相似文献   

2.
通过沈阳二环路改造工程50联预应力混凝土连续箱梁的后张法预应力施工实例,对后张法预应力施工张拉技术进行了总结,并对施工中常遇到的问题作了简要分析。  相似文献   

3.
现代预应力技术推动了土木工程的快速发展,同时也是当今大型结构特别是桥梁施工中应用最广泛的施工技术。随着预应力施工技术的不断发展,尤其是预应力材料、锚固体系等技术的出现,丰富了预应力施工技术的应用范围与应用效果。文章对预应力技术的发展历史进行了分析,并对我国目前发展的预应力材料及预应力技术的应用进行了论述。  相似文献   

4.
在现代的大型建筑工程中,通常会应用到高达跨度预应力混凝土梁施工技术,随着高大跨度预应力混凝土梁施工技术在当前建筑工程中的应用,使得这些工程的质量和性能都有了实质性的飞跃,从而为满足人们对建筑质量和性能的要求以及促进高大跨度预应力混凝土梁的发展起到了不可估量的作用。在进行高达跨度预应力混凝土梁的施工时,必须要采取科学合理的施工技术,从而才能够确保其施工质量和性能。而为了使高达跨度预应力混凝土的施工水平能够进一步提升,加大对高大跨度预应力混凝土施工技术的研究力度不仅意义重大,而且迫在眉睫。本文通过对高达跨度预应力混凝土梁的深入研究,然后对其施工中的重点难点以要点进行了详细阐述,以供同行参考。  相似文献   

5.
在孟良河倒虹吸工程中,施工单位进行的"倒虹吸管身预应力施工工艺研究",精确建立了预应力施工工序与模板、钢筋工序的穿插顺序,创造了预应力工序施工时的施工辅助设施,并优化了预应力的张拉顺序,对后续同类工程施工具有指导意义.  相似文献   

6.
预应力技术在公路桥梁施工中的运用   总被引:2,自引:0,他引:2  
预应力技术是如今公路桥梁工程中最为重要的技术之一,为了提高公路桥梁的施工质量,应该充分将预应力技术运用于公路桥梁施工中。文章对我国公路桥梁施工中预应力技术的运用现状进行了说明,并分析了预应力技术在公路桥梁施工中的重要性,最后对其运用的方法进行了探讨。  相似文献   

7.
预应力技术是当今桥梁施工领域发展速度最快、用途最为广泛、最有发展潜力的一门科学技术。然而,预应力张拉施工工艺相对较复杂,要求预应力结构施工的专业性强,在实际施工中存在诸多质量问题。本文针对预应力桥梁施工中的一系列问题,进行了大量的调查和分析,对施工中发生的诸多预应力技术问题提出了相应措施。  相似文献   

8.
刘健 《民营科技》2012,(10):295-296
结合预应力施工实际情况,从波纹管定位,预应力管道定位,预应力筋穿束,张拉,压浆五个方面进行论述。提出了各施工工序控制措施,以实现对悬臂浇筑预应力混凝土连续梁桥施工的有效质量控制。  相似文献   

9.
本文主要对预应力混凝土管桩在公路地基施工中的应用问题进行了研究。本文首先概迷了预应力混凝土管桩的类型,然后分析了预应力混凝土管桩的技术特性,最后探讨了预应力混凝土管桩施工的技术要点。  相似文献   

10.
随着国民经济的高速发展,我国公路运输事业也得到了极大的发展空间。预应力混凝土材料作为路桥工程预应力施工中最主要的施工原料,在路桥工程施工中得到了广泛地应用。本文主要对预应力混凝土结构的施工优势、施工准备及施工技术应用进行了分析。  相似文献   

11.
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.  相似文献   

12.
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.  相似文献   

13.
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.  相似文献   

14.
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.  相似文献   

15.
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.  相似文献   

16.
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.  相似文献   

17.
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.  相似文献   

18.
杨明 《价值工程》2012,31(7):16-17
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。  相似文献   

19.
丛广英  乔炜君 《价值工程》2010,29(6):245-245
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。  相似文献   

20.
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.  相似文献   

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