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分析了20 t桥式抓斗起重吊车常见故障及原因,采取了相应的解决措施,从根本上杜绝了吊车的常见故障、节约了备件、降低了生产成本、减轻了维修人员劳动强度及提高了企业的经济效益. 相似文献
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介绍了Access数据库的特点和优点,在采购管理中应用的意义.使用Access编写了<供应仓储管理系统>,论述了该系统的设计思想、程序结构及应用效果.该系统的应用,减轻了工作人员劳动强度、提高了工作效率、确保了物资及时供应、减少了资金的占压. 相似文献
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济钢中厚板厂3500线粗轧机改造主传动系统采用ACS6000SD变频驱动系统,系统的整流侧和逆变侧采用了对称结构,降低了维护难度;采用了IGCT技术,保证了系统的性能响应;使用了DTC技术,提高了系统的鲁棒性。这种交直交系统做到了对电网的最少谐波运行,既减少了对电网的污染,又省去了无功补偿系统的投资。 相似文献
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2012年1月9日,"智能巡点检仪开发与应用"项目通过了由首钢总公司组织的验收评估。该项目研发的设备智能巡点检仪使用可靠、运行稳定,各项功能和技术指标均达到设计要求,实现了与四级信息化系统的紧密集成和数据共享,提高了数据准确性和人力资源效率;优化了业务流程、加快了信息传递、深化了资源共享,有效减少了设备故障停机时间,提高了设备技术管理水平。 相似文献
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概要介绍了樟东坑矿区的主要地质特征,在前人工作的基础上,对矿床的基本特征(尤其是矿脉的变化特征)进行了分析、探讨和总结;利用这些特性及其变化规律,采用一些新的探矿方法不但找到了一些隐伏盲矿,增加了地质储量,延长了矿山的服务年限,而且降低了探矿费用,减少了采矿的盲目性,节约了成本,增加了经济效益。 相似文献
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针对鞍钢1780工程提升泵站沉箱南侧墙(壁)生产的大面积剥片、碎裂进行了原因分析,认为是由于动压水和不均匀土侧压力等因素造成的,并提出了相应对策。 相似文献
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The monitoring of five precast, prestressed bridge girders during fabrication and service provided the opportunity to observe changes in camber over time. These camber variations were compared with corresponding strain and temperature measurements. Each of the girders was cast outside during the winter. As a result, the cold ground acted as a heat sink, and a significant temperature gradient existed during curing of each of the instrumented girders. These temperature gradients are believed to have caused the wide range in the short- and long-term cambers. A procedure to calculate the effect that curing temperatures have on girder camber is presented. In addition, the measured camber values are compared with predicted values using the multiplier method, improved multiplier method, and a detailed time-step method. It was found for the long-span girders that the measured camber values were on average within 10% of the predicted values using the detailed time-step method, but ranged from 22% lower to 27% higher for the simpler methods. 相似文献
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鞍钢某厂铸钢车间露天跨的10t吊车梁、柱通常在爆池强震条件下工作,使结构的使用寿命受到影响。介绍了在不停产的情况下,对该结构采取的几种加固方法。 相似文献
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通过对地下通廊防水混凝土工程施工工艺的研究,结合长期施工经验,对地下通廊防水混凝土工程施工技术进行了总结,对关键技术环节进行了改进,提出了控制措施. 相似文献
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工业建筑中,由于大部分设备基础及各种构筑物基本都埋设于地下,因此,结构的防水要求较高。对于混凝土壁渗水这个工程上的质量通病,长期以来,工程技术人员一直在寻找有效的解决方法。通过在马钢建设施工中施工缝防水处理的实践应用,总结了一些施工缝的防水处理措施。 相似文献
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针对目前的设计和施工现状,对纵向钢筋的构造和弯曲钢筋的合理设置两个问题进行详细分析。并介绍了悬臂梁中采用弯起钢筋存在的缺陷。 相似文献
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Arturo N. Fontan Jacobo M. Diaz Aitor Baldomir Santiago Hernandez 《Canadian Metallurgical Quarterly》2011,16(3):461-470
The conventional design process of a launching nose of an incrementally launched bridge is based on trial-and-error methods to reduce bending moment of prestressed concrete deck at the foremost support during launch. With this method, there is no guarantee that the obtained solution is the best among all the possible solutions, since they all depend on the experience and intuition of a designer, and they are also restricted by a limited number of possible iterations. Given that launched bridges constitute an important constructive typology, all the available capacities of design innovation should be incorporated, including numerical optimization. This research work proposes an objective and rigorous formulation to optimize the launching nose of a launched bridge under real constraints that a bridge designer can encounter in practice. Comparing the results obtained by conventional process and those obtained by optimization techniques allows us to verify that some of the assumptions considered in classical design methods of a launching nose are not based on any theoretical foundation. This fact demonstrates the utility of numerical optimization to improve a design. 相似文献
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论述了筒仓工程中以部分轻骨料混凝土代替普通混凝土的应用研究,阐述了轻骨料混凝土在工程应用中的配合比设计方法,并对轻骨料混凝土在筒仓工程中的经济效益提出了一些建议,为工程技术人员和轻骨料混凝土研究人员提供了一些数据参考. 相似文献