共查询到19条相似文献,搜索用时 140 毫秒
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山东省引黄济青指挥部曾从美国GOMACO(勾马克)公司引进一套C-450型大型渠道衬砌机(见图1),用于山东省引黄济青工程输水渠道工程衬砌施工。 相似文献
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随着高速公路桥梁工程领域的不断发展,扩盘桩逐渐在软土地区得到应用,在地质条件较差且承载力要求较高的施工环境中,固结扩盘桩是一个优良的选择,可提高成桩质量,减少施工风险,但其垂直度不易控制。该文以沾临高速公路引黄济青大桥13#台固结扩盘桩为例,通过超大变径固结扩盘桩施工测量及相关控制措施的研究,提出钻孔施工纠偏、垂直度控制等措施,在实际施工过程中达到控制钻机垂直度偏差的效果,保证施工顺利进行。 相似文献
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陈有令 《制冷空调与电力机械》1988,(4)
由水电部杭州机械设计研究所设计、上海水工机械厂制造的 4m 硬岩屈进机于1987年2月在上海水工机械厂召开现场评议会后,当年年底落实在由水电部五局二分局施工的引黄济青引水工程中使用。设备于88年5月陆续到达工地,经过我所有关工程技术人员及上海水工机械厂工人师傅二个多月的紧张安装、调试,于7月11日初装完毕,此后在作设计工况下,用自行式方案,将整机推进100多 m 到达作业面,在洞口 相似文献
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动态测试技术的发展系列讲座 总被引:1,自引:0,他引:1
随着快速傅立叶变换(FFT)算法和基于FFT的动态测试分析仪的出现,产生了模态分析与试验这一新技术,并逐渐成为机械与结构振动排故和动态设计的重要手段,在机械、航空、航天、汽车、动力、土木等工程领域获得广泛应用。模态分析与试验三十年的发展大致可分成三个阶段。初期阶段(60年代中期到70年代中期)有两项引人注目的“发明创造”:一是振型动画显示,使抽象的结构动力学特性易于为工程人员所理解;二是带力传感器的激振力锤,使模态试验简单易行,并从试验室走向现场。第二阶段(70年代中期到80年代中期),模态分析与试验有了长足的进步,提出了各 相似文献
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锦屏二级水电站进水口拦污栅混凝土浇筑施工,前期浇筑质量较差,单元优良率低,为全面提高混凝土浇筑质量,确保工程创优,项目部成立进水口拦污栅混凝土浇筑质量管理QC小组,通过QC小组的不懈努力,拦污栅混凝土浇筑质量得到极大的提高,为工程创优打下了坚实的基础。 相似文献
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乳化炸药混装车在三峡工程中的应用 总被引:4,自引:4,他引:4
我国自80年代初由冶金部引进炸药混装车技术以来,一直仅限于矿山使用。葛洲坝集团公司在三峡工程施工中,针对水电工程的特点进行了炸药混装车应用技术的研究,在全国首次将其应用于水电工程中。目前,这项技术已大规模应用于三峡主体工程施工中,并经7000多吨制药爆破实践证明具有巨大的技术优势和经济效益,得到了各方人士的高度评价。 相似文献
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Engineering project management is the whole process of project construction management activities up to the point of achieving the goals of engineering construction, which adopts the means of planning, organizing,leading, and controlling. In addition, engineering project management modes are the works of project management and the technical guarantee of project success. For the quality and efficient transformation demands of the Chinese construction industry in the process of marketization, internationalization and informatization, based on the connotation and development path of engineering project management modes, the 16 main and new kinds of project management modes both domestically and abroad are divided into trading mode, financing mode and management mode. These have led to comparative analysis and brief commentary. Finally, it will be pointed out that the engineering project management modes move throughout the whole management process, the combined model and the expansion development of financing model. This work will provide reference for project participants to choose the appropriate project management modes and better understand building company transformation. 相似文献
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Helge A. Sandtorv Per Hokstad David W. Thompson 《Reliability Engineering & System Safety》1996,51(2):159-167
Experience data on the reliability of equipment has become vital to many types of engineering and maintenance analyses. The consequences of incorrect design or poor maintenance may adversely affect: safety, the environment or cost in most categories of process industries, and, in particular, offshore exploration and production industries. The OREDA project is a data collection programme for the offshore industry which has been operating since the early 80's. A high level of knowledge has been gained from this programme on: specification of data, data collection methods and the utilization of data. Some of the results and the knowledge gained from this project are presented in this paper. 相似文献
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《Advanced Powder Technology》2022,33(3):103503
In order to investigate feasibility of waste oyster shell powder (WOSP) as fine aggregate to produce eco-friendly mortar, workability (slump flow and slump flow loss), mechanical properties (compressive strength and flexural strength), durability (sorptivity, volume of permeability coefficient, water permeability coefficient and chloride ion diffusion coefficient) and microstructure (pore size diffusion) were studied. The effect of replacing river sand with different WOSP proportions (0%, 10%, 20% and 30%) in flowability, strength, permeability and microstructure of mortar have been revealed. The results indicate that increasing substitution ratio of WOSP could decrease the mortar slump flow. The utilization of WOSP in mortar enhanced the compressive strength, flexural strength, resistance to water penetration and chloride diffusion. The WOSP addition exhibits a positive contribution to the pore size distribution of the mortar. Furthermore, it is founded that the utilization of WOSP as construction material is a satisfactory way to reduce waste pollution. Based on its superior mechanical property, durability, eco-efficiency and cost-efficiency in mortar, it is recommended to utilize WOSP alternative to river sand at 10–30% in construction engineering. 相似文献
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本文从道路工程成本控制的角度,结合参与的道路工程项目施工与管理经验,分析了目前道路施工成本控制中的影响因素和存在的主要问题,提出了道路工程成本控制方法和改进措施,以期降低施工成本,提高经济效益。 相似文献