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1.
车辙是指在渠化交通的道路上,在行车荷栽的反复作用下,路面发生的不可恢复的永久变形,导致行车舒适性降低,影响高速行车的安全。文章介绍了坛百高速公路车辙的分类,分析了病害成因,通过比选维修方案,推荐处治坛百高速路路面车辙深度小于25 mm病害的最佳维修方案。  相似文献   

2.
车辙是指在渠化交通的道路上,在行车荷栽的反复作用下,路面发生的不可恢复的永久变形,导致行车舒适性降低,影响高速行车的安全。文章介绍了坛百高速公路车辙的分类,分析了病害成因,通过比选维修方案,推荐处治坛百高速路路面车辙深度小于25 mm病害的最佳维修方案。  相似文献   

3.
《价值工程》2017,(8):110-112
本文从高速公路沥青路面病害入手,介绍了失稳性车辙产生的原因及处治措施,并以贵州某高速公路为例,通过对其病害情况的实地调查,结合当地气候、地理条件及长大纵坡段较多道路状况,着重分析了山区高速公路沥青路面失稳性车辙病害的成因,并结合目前车辙维修技术,具体提出不同程度车辙病害的处治方法和建议,对类似工程的车辙防治和处理有一定参考价值。  相似文献   

4.
复式微表处填补技术是当今乳化沥青稀浆封层现代化养护技术的一种,具有高抗磨耗和高抗滑性能,适用于交通量大、重载车多的路面车辙修补。本文以处治广西南友高速公路管养桩号K98 100— 970下行线沥青路面车辙病害为例,介绍利用本地英安岩作为集料的复式微表处填补技术的配合比设计及施工过程质量控制。  相似文献   

5.
为评价高速公路沥青路面车辙病害产生的原因,采取钻芯取样法,对试样进行体积参数、动态蠕变、强度、抽提、飞散等试验,确定高速公路沥青混合料体积参数、材料组成、强度性能、高温稳定性,判定车辙形成的成因,为制定沥青路面车辙病害处治方案提供必要的技术支撑。  相似文献   

6.
SMA沥青路面具有高温抗车辙、低温抗裂、抗水损害、抗老化和抗滑等特点,目前被在高等级路面工程中被广泛使用,文章论述了高速公路SMA沥青路面施工过程中拌和、运输、摊铺、碾压等施工控制的一些经验.  相似文献   

7.
为评价高速公路沥青路面车辙病害产生的原因,采取钻芯取样法,对试样进行体积参数、动态蠕变、强度、抽提、飞散等试验,确定高速公路沥青混合料体积参数、材料组成、强度性能、高温稳定性,判定车辙形成的成因,为制定沥青路面车辙病害处治方案提供必要的技术支撑。  相似文献   

8.
目前,车辙已成为我国高速公路沥青路面最主要的破坏形式和沥青路面大修罩面的主要因素.减少沥青路面车辙的较实际途径,是设计出抗车辙性能好的沥青混合料.文章主要对沥青路面车辙抗疲劳性能进行了研究.  相似文献   

9.
文章以广西坛洛—百色高速公路(以下简称坛百高速公路)车辙修复工程为依托,提出了NAC-10薄层罩面矿料级配类型,采用当地的辉绿岩,进行了NAC粗骨料骨架分析和NAC-10配合比优化设计及配合比检验,2011—2012年在坛百高速公路上进行了比较大面积的铺筑。结果表明,NAC-10混合料的矿料级配能够很好地形成骨架,沥青混合料的马歇尔技术指标和路用性能完全能够满足《公路沥青路面施工技术规范》(JTG F40—2004)的要求,2011年铺筑的路段经过1年的使用,尤其是经历一个严酷的夏季和2012年的多场暴雨,路面没有出现任何病害。  相似文献   

10.
目前,车辙已成为我国高速公路沥青路面最主要的破坏形式和沥青路面大修罩面的主要因素。减少沥青路面车辙的较实际途径,是设计出抗车辙性能好的沥青混合料。文章主要对沥青路面车辙抗疲劳性能进行了研究。  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.
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.  相似文献   

17.
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.  相似文献   

18.
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   

19.
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   

20.
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   

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