灌注桩中后压浆技术的应用及效果

介绍了后压浆技术在桩基工程中的应用情况;对基桩的静载对比试验表明,采用桩端和桩侧后压浆技术,可提高基桩承载力44%以上基桩的下沉量减小42.5%:根据应用结果,提出了适用的桩基后压浆施工工艺和设计参数.     

桥梁灌注桩后压浆施工技术

本文结合工程实例,介绍了桥梁后压浆施工工艺在铁路客运专线中的应用,通过对已施工的桩基进行桩底和桩侧压注水泥浆的方法,从而提高总桩侧阻力和总桩端阻力,有效控制了工后沉降,实现了提高桩基承载力的目标。     

后压浆组合桩竖向承载性能现场静载试验研究

本文依托现场工程,介绍桩侧及桩端组合后压浆工艺关键控制技术,开展竖向受荷作用下后压浆组合桩现场静载试验研究,分析其承载性能及后压浆工艺对桩基承载力的增强作用机理.试验结果表明,试桩桩顶荷载-沉降曲线为缓变型,竖向承载力大于6300kN,满足工程设计要求.后压浆组合桩可通过浆液对桩端持力层及桩周泥皮的渗透、压密、劈裂作用改善桩-土界面及桩周土体力学性能,从而提高桩基承载力,减少沉降量,具有显著的经济和社会效益.     

钻孔灌注桩后压浆技术在天津生态城地区的工程应用

文章通过工程实例介绍了后压浆钻孔灌注桩施工技术的应用,阐述了后压浆钻孔灌注桩的加固机理及施工技术要点,同时说明后压浆技术对于改善桩端及桩侧阻力的有效性。     

钻孔灌注桩后压浆技术的应用与研究

钻孔灌注桩后压浆技术是在灌注桩施工完成后对桩底、桩侧进行注浆处理,从而提高单桩承载力,以减弱或消除桩底沉渣、桩侧泥皮等缺陷对基桩承载力的影响,在保证单桩承载力的前提下对桩基础设计施工进行合理优化,缩短桩身长度,降低施工难度和工程造价。本文结合工程经验,对后压浆施工工艺进行研究和探讨,较系统分析了后压浆桩承载力的增强效应与机理,对钻孔灌注桩后压浆工程提供理论指导与实践参考。     

民用建筑中的桩基础运用

桩的应用提高了房屋建筑的质量，缩短了工期。本文通过阐述桩的分类，分析、研究预制桩和灌注桩的施工技术，丰富和完善了我国房建工程桩基技术，为以后的施工过程中桩基础技术广泛的运用奠定基础。     

后压浆技术在桩基中的应用

在桩基领域里,为了提高桩的承载力,出现了后压浆灌注桩这一新技术。文章介绍了后压浆灌注桩的主要施工工艺,并且通对后压浆灌注桩工程特性进行了全面的分析和研究。研究表明,后压浆灌注桩明显地改善灌注桩的工程特性,具有良好的工程应用前景、社会效益和经济效益。     

公路桥梁后注浆钻孔灌注桩施工工法研究

文中通过对国内公路桥梁工程中钻孔灌注桩施工现状分析,指出了目前设计与施工中普遍存在的不足之处.基于后压浆技术的工程实践应用,开展了后注浆钻孔灌注桩在公路桥梁建设工程中施工工法的系统研究,得到了标准化操作规程与质量控制标准.文中研究成果可供同类型桩基设计施工实践中应用参考.     

微型钢管混凝土桩加固软弱地基

微型桩是一种采用压浆成桩的灌注施工技术,在边坡工程中得到广泛的应用。本文在介绍微型桩的定义、对其特点进行分析的基础之上,结合T76L迈式微型桩的施工参数以及施工过程中需要控制的技术要点对微型桩的施工工艺以及防侵蚀措施等进行了较为详细的论述和分析,以期给从事微型桩施工的工作人员起到一定的参考作用。     

微型钢管混凝土桩加固软弱地基

微型桩是一种采用压浆成桩的灌注施工技术，在边坡工程中得到广泛的应用。本文在介绍微型桩的定义、对其特点进行分析的基础之上，结合T76L迈式微型桩的施工参数以及施工过程中需要控制的技术要点对微型桩的施工工艺以及防侵蚀措施等进行了较为详细的论述和分析，以期给从事微型桩施工的工作人员起到一定的参考作用。     

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.