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1.
本文结合京港澳高速公路新许段的面层概况,具体论述了该高速公路上面层SBS改性沥青混合料AC-16C的拌制、运输、摊铺和碾压等施工工艺以及质量控制,并根据实际施工情况提出了一些建议,为以后改性沥青混合料的施工积累了宝贵经验.  相似文献   

2.
本文结合京港澳高速公路新许段的面层概况,具体论述了该高速公路上面层SBS改性沥青混合料AC-16C的拌制、运输、摊铺和碾压等施工工艺以及质量控制,并根据实际施工情况提出了一些建议,为以后改性沥青混合料的施工积累了宝贵经验。  相似文献   

3.
本文结合京港澳高速公路新许段的面层概况,具体论述了该高速公路上面层SBS改性沥青混合料AC-16C的拌制、运输、摊铺和碾压等施工工艺以及质量控制,并根据实际施工情况提出了一些建议,为以后改性沥青混合料的施工积累了宝贵经验。  相似文献   

4.
朴顺子 《民营科技》2008,(4):172-173
结合大庆市南三改造工程的面层概况,具体论述了南三路上面层SBS改性沥青混合料AC-16I的拌制、运输、摊铺和碾压等施工工艺以及质量控制,并根据实际施工情况提出了一些建议,为以后改性沥青混合料在大庆地区的施工积累了宝贵经验。  相似文献   

5.
SMA改性沥青混合料可以使沥青路面的高温稳定性和耐久性显著提高,前提是有良好的施工条件和配合比设计。本文简要讲述了由实际工作经验得出在市政道路工程中SMA沥青混合料的配合比设计。针对SMA沥青面层提出了施工质量控制要点和配合比设计。  相似文献   

6.
文章结合陕西省西安至汉中高速公路施工实践,介绍了SBS改性沥青混凝土路面上面层混合料配合比设计方法及过程,提出操作过程中应注意的事项,以供同类工程施工参考.  相似文献   

7.
目前研究表明高速公路许多破坏是由中面层破坏引起,针对这种现状对AC-20型混合料进行了级配优化设计并采用了SBS改性沥青,在级配设计以及最佳沥青含量确定中借鏊了美国SUPERPAVE技术,通过对混合料性能的检验表明优化以后的混合料性能有了很大的提高,证明优化设计是成功的.  相似文献   

8.
文章结合陕西省西安至汉中高速公路施工实践,介绍了SBS改性沥青混凝土路面上面层混合料配合比设计方法及蠢吏程,提出操作过程中应注意的事项,以供同类工程施工参考。  相似文献   

9.
李锋 《价值工程》2022,(21):119-121
高温环境一直以来都是沥青路面最大的影响因素,其影响主要在于高温软化、面层开裂、重载下车辙裂缝等,不仅降低了路面行驶的舒适体验,也增加了沥青路面工程的返修费用,大大缩短了路面的设计使用年限,不利于现代化城市交通的规划发展。本文主要对SMA改性沥青混合料在30℃,40℃,50℃,60℃,70℃,80℃六种温度下(默认其他影响因素相同),SMA改性沥青混合料的温度稳定性及在掺入0.4%木质素纤维后SMA改性沥青混合料的温度稳定性进行比较,发现掺入0.4%木质素纤维后SMA改性沥青混合料的各项试验性能均比未掺入木质素纤维时有所提高,从而达到推荐指导合适的纤维稳定剂在SMA改性沥青混合料沥青路面中的使用目的,提高沥青路面各项性能指标。  相似文献   

10.
本文根据京津高速公路H标段的施工经验,论述了改性沥青混凝土路面上面层材料组成设计,沥青混合料调试、生产及机械摊铺、碾压的施工质量控制要点,以及施工过程中注意的问题。  相似文献   

11.
沈皓婉 《价值工程》2010,29(13):245-247
从社会和政治变化、电子音乐流派的发展,形成了电子音乐,科学和技术的发展对电子音乐有重大的影响。他们是四个不同历史时期的发展——未来派,法西斯主义,达达派、电子音乐的时期。从最早使用:麦架,嘘声,窃窃私语,爆炸等。音乐和表达感情的表现,在阶级斗争,政治变革和经济危机、发展迅速的电子音乐,用在许多不同的零件,例如播放音乐、电影、电视等,都成了一个必不可少的组成部分的音乐市场。  相似文献   

12.
姬鹏程 《价值工程》2014,(15):138-142
本文主要通过接触网软横跨工程传统的施工技术的进行分析、试验、对比优化改进,通过测量、数据采集、计算、预制及安装调试等步骤分析、总结,创新和完善了软横跨施工技术。充分的证实了软横跨优化创新后的施工技术,在接触网工程施工过程中起到了一次到位良好的效果,缩短工期,避免了重复用工,提高了工效,在今后中国电气化铁路接触网新建、大修、扩建及改建工程中具有很强的推广意义。  相似文献   

13.
高洁  张正 《价值工程》2010,29(34):115-115
就目前的社会经济而言,国家拨给医院的资金是很有限的,而正是因为这样,医院更应该在面对经费不足的时候,计划好开源节流,管理好现有的固定资产,并优化资源,努力提高社会效益以及经济效益。本文简单地探讨目前医院固定资产管理中存在的问题以及对策。  相似文献   

14.
赵健博 《价值工程》2014,(5):108-109
近些年,国家对基础性建设的投入越来越大,我们的公路建设也日益增多。公路工程是一项综合性、系统性较强的工程,是集路基、路面、路线、桥涵、隧道等于一体的综合体系。随着经济社会的发展和施工工艺的不断进步,人们对公路工程的要求也更加严格。为了保证公路建设的正常施工,就需要工程设计按时按量完成。而如何处理好质量与工期的矛盾则是公路设计者面临的难题。本文对公路工程设计的重要性,步骤等进行一个分析研究。  相似文献   

15.
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   

16.
The BRICS countries in general, and China and India in particular, are now widely regarded as the areas of the world likely to challenge the economic leadership of the United States (US) and the European Union (EU). A large part of this challenge will come from rapid technological catch‐up by China and India. Yet, despite a recent rise in interest, there is limited knowledge about how and where innovation takes place in these two leading emerging countries and to what extent the Chinese and Indian territorial systems of innovation differ from those in the EU or the US. In this article we explore the geography of innovation in China and India, concentrating on understanding key territorial‐level innovation trends by country, region and technology field, using the US and the EU as benchmarks. We find significant contrasts between the geography of innovation in China and India and that of the US and the EU. First, the degree of concentration of innovative activities in both countries is extremely high. Levels of agglomeration of innovation in the coastal provinces of China, as well as in Delhi and the South of India, significantly exceed the levels of agglomeration found in the USA and the EU. Secondly, China has witnessed a more rapid increase in the degree of concentration of innovation than India. We posit that the differences in the geography of innovation between, on the one hand, China and India and, on the other hand, between these countries and the developed world are rooted in different institutional settings, different systems of innovation and different national innovation strategies.  相似文献   

17.
在国内外,很多优秀企业从愿景和价值观出发,通过工作流程对其进行分解并实现公司标准管理体系,通过管理信息化建设将工作流程加以实施,最终实现企业专业化、标准化、集约化工作流程固化和与之匹配的管理信息化平台。文章从专业化、标准化、集约化与信息化实现之间的关联分析出发,以实现专业化、标准化、集约化统筹规划运作与公司管理信息化系统软件实现为思路,以解决长期提升公司管理运作效率为宗旨,对统筹企业专业化、标准化、集约化与信息化建设进行探讨。  相似文献   

18.
The scientific credibility of economics is itself a scientific question that can be addressed with both theoretical speculations and empirical data. In this review, we examine the major parameters that are expected to affect the credibility of empirical economics: sample size, magnitude of pursued effects, number and pre‐selection of tested relationships, flexibility and lack of standardization in designs, definitions, outcomes and analyses, financial and other interests and prejudices, and the multiplicity and fragmentation of efforts. We summarize and discuss the empirical evidence on the lack of a robust reproducibility culture in economics and business research, the prevalence of potential publication and other selective reporting biases, and other failures and biases in the market of scientific information. Overall, the credibility of the economics literature is likely to be modest or even low.  相似文献   

19.
This symposium opens up new critical insights and analytical perspectives into the relationships between power, politics, materiality and urban engineering. In so doing it demonstrates the central role of engineers in the production and negotiation of everyday life in the city. In contrast to the technocratic exercise engineering often professes to be, the contributors to this symposium argue that the assembling and choreography of cities through the myriad techniques, routines, standards and visions of engineers is inextricably bound up with broader socio‐cultural, material and political urban dynamics and processes. This necessitates investigating the multiple and competing social imaginations, forms of knowledge and regimes of expertise associated with urban engineering. The symposium's five articles, straddling disciplinary backgrounds in geography, anthropology, engineering and history, focus analytical and empirical attention on the figure of the engineer and on the work of engineering in the cities of Paris, Mumbai, Singapore and London. Engineering, we suggest, is a diagnostic for probing the shifting forms of mediation that animate and inhabit contemporary dynamics of urban change. The symposium thus opens up a new avenue for cross‐disciplinary and transregional research for urban studies while also suggesting innovative ways of conceptualizing urban transformation and contestation.  相似文献   

20.
文化发展与科技创新两者交织融合,科技创新是文化发展的重要引擎,文化发展也成为科技创新的引领。文化与科技融合本质是由科技突破和技术创新所带来文化产业在生产方式、消费方式、产业形态和产业结构等方面的变革,融合的核心是价值链重构,融合广泛发生在产业、市场、企业和生产要素等领域。目前,我国文化与科技的融合相对滞后,发展压力与发展机遇并存。从路径上来说,可从产业、市场、企业和人才四个方面实现文化与科技的融合。  相似文献   

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