共查询到20条相似文献,搜索用时 93 毫秒
1.
目前,用玻璃钢保温复合管长距离输送地热水在我国属首次。在保温层的设计、制作及安装方面会遇到一些问题,本文进行了一点探索,并提出了解决办法,供同行参考。 相似文献
2.
介绍了汶河特大桥预应力空心梁板的的制作及安装各道工序及其施工要点,对保证施工质量及施工进度所采取的措施作了总结. 相似文献
3.
介绍了柔性接口管道在农田等没有施工道路的特定地形条件下铺设时所采用的一种水浮安装新工艺。它与其传统常规安装比较,具有减轻劳动强度,加快施工速度,节省安装费用和减少占地宽度等优点,通过实际安装工程说明了水浮安装工艺的可行性。 相似文献
4.
5.
6.
供热管道安装是建筑工程施工中的重点环节,如果在管道安装方面存在质量问题,则会给人们的日常生活造成一定影响。所以,施工企业应注重暖通安装工程的施工控制,从细节入手加强施工质量管理,完善相应的管理体系和规章制度,要求各级人员按照制度要求操作,保证施工质量和施工安全。文章从建筑暖通安装工程的施工角度出发,进一步探讨建筑暖通安装工程施工质量的控制与管理,并提出相应管理措施。 相似文献
7.
文中主要介绍了水下焊接面临的问题,包括水下焊接的可见性差,水环境对焊缝的影响,水对焊件冷却速度的影响和焊件连续性的影响等;介绍了常用水下焊接的主要方法,包括高压干法焊接、常压干法焊接和局部干法焊接等;并结合国内外水下焊接的特点、发展现状及发展趋势,对国内的水下焊接技术的进一步发展进行了探讨。 相似文献
9.
文章通过对美国地下空间的实地考察,扼要地介绍了两点内容(1)结合城市建设,修建地下铁道;(2)立足战备,修建水下隧道.这些内容可供我国开发地下空间时参考. 相似文献
10.
11.
文章以百色市新兴路DN2600暗涵项管施工为例,介绍了泥水平衡式顶管施工方案与顶进施工工艺,指出该施工方法安全、稳定、可靠,可在涵道顶进线路控制工程中取得良好的施工效果。 相似文献
12.
13.
14.
15.
水下混凝土灌注是施工中关键的一道工序,文章针对水下砼灌注施工过程中料斗上浮现象,分析上浮原因,对如何预防料斗的上浮提出了相关的措施,对于水下混凝土快速、连续施工具有借鉴作用。 相似文献
16.
新大瑶山隧道穿越砂岩段揭露一高压出水点,出水点压力为3~4 MPa,流量为430 m3/h左右,水头喷射距离达47m,在突水治理中采取了引排水、施作止水墙、顶水注浆和全断面帷幕注浆综合技术措施,成功地封堵了高压突水,取得了理想的技术经济效果.文章介绍了新大瑶山隧道的工程概况、工程地质及水文地质条件,以及涌突水情况和治理措施. 相似文献
17.
The purpose of this study is to understand the effects of the influential factors that affect the sustainable development of new energy vehicle in China, investigate the cause-effect relationships among them, and propose some appropriate policies and efficacious measures for the policy-makers to promote its sustainable development. Interpretative Structuring Modeling was used to identify the critical factors affecting the sustainability of China’s new energy vehicle industry and to find the potential relationships among the factors; subsequently, fuzzy Decision Making Trial and Evaluation Laboratory was employed to investigate the cause-effect relationships among the influential factors and to prioritize these factors. The results reveal that technological maturity, technological standards for new energy vehicles, and funds on R&D of new energy vehicles are the three most important driving factors for promoting the sustainable development of new energy vehicle industry of China. Some implications were also proposed for China’s authority. The success factors and strategic implications of new energy vehicles in China were investigated in a multi-criteria analysis approach. 相似文献
18.
19.
以哈萨克斯坦盐下油田至让纳诺尔油气混输管线为例,介绍了采用清洁水作为介质进行全线整体试压,投产采取油顶清管球顶水的施工工艺。此方法避免了在哈国办理上水和排水许可证,缩短了施工周期,又满足该国的环保要求。 相似文献
20.
This paper investigates temporal and weather-related variation in taxi trips in New York City. A taxi trip data-set with 147 million records covering 10 months of activity is used. It is shown that there are substantial variations in ridership, taxi supply, trip distance, and pickup frequency for different time periods and weather conditions. These variations, in turn, cause variations in driver revenues which is one of the main measures of taxi supply–demand equilibrium. The findings are then used to discuss the anticipated impacts of two recently enacted taxi regulation changes: the first fare increase since 2006 and the E-Hail pilot program which allows taxi hailing with smart phone applications. The fare increase is estimated to cause varying levels of revenue increase for different time periods. E-Hail apps are not expected to offer considerable improvements at all times, but rather when both adequate taxi supply and demand occur simultaneously. 相似文献