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1.
介绍了板、带材压下规程及型材的孔型优化设计问题,并指出了设计特点与方法,给出了优化后的效果。为钢材及其它有色金属轧制规程的设计提供了设计方法。  相似文献   

2.
就工程设计中由于忽视楼梯设计而出现的诸多问题,剖析了产生问题的原因,并阐述了楼梯设计的重要性及如何才能做好楼梯设计。  相似文献   

3.
阐述了梅钢将六西格玛设计方法引入产品研发的基本想法,描述了六西格玛设计的定义及其作用,在研究了六西格玛设计模型的基础上,结合梅钢材料设计及生产的特点,提出了梅钢DCOV的独特设计模型,并以Q450NQR1新产品开发试制为例,详细介绍了梅钢采用该模型在新品开发中应用的全过程,并验证了有效性。  相似文献   

4.
〕针对高层建筑剪力墙中连梁的合理设计问题,以及设计中连梁截面尺寸的限值及配筋进行了分析探讨,给出了连梁截面高度及其刚度的调整公式,并提出了设计建议。  相似文献   

5.
介绍了通过运用PLC和触摸屏技术来设计矿热炉炉顶布料控制系统,并针对该套控制系统的设计、外围电气设备的电控原理,控制系统中的触摸屏页面设计和PLC的原理及作用进行了分析,并通过在12.5MVA矿热炉上的运用,取得了显著的效果。  相似文献   

6.
本文为解决链式碳块输送机设计质量较差问题,对该设备的工艺及结构特点,设计技巧和设计中应注意的关键技术问题作了详细的论述,给出了完整的计算方法,并对设计质量管理提出了建设性意见。  相似文献   

7.
轧制规程优化设计   总被引:1,自引:0,他引:1  
介绍了板、带材压下规程及型材的孔型优化设计问题,并指出了设计特点与方法,给出了优化后的效果。为钢材及其它有色金属轧制规程的设计提供了设计方法。  相似文献   

8.
本文介绍了大法精炼及浇铸的工艺设备与工艺过程,同时围绕火法精炼及浇铸工艺阐述了重油燃烧系统、氧化还原系统、排烟气系统、冷却系统、操作控制系统的设计,并列举了部分设计指标与实际投产指标值,从而证明该设计是成功的。  相似文献   

9.
介绍了一种用于危废处置的等离子体熔融炉工艺及设计原则。从等离子体熔融炉体、等离子体炬及电源、耐火材料及砌筑、熔渣液位控制、排渣系统多个方面对等离子体熔融炉系统进行了详细设计,并结合实践对其设计经验进行了总结。设计的等离子体熔融炉实际运行过程中处置能力达到了额度负荷,总体运行状态良好,达到了设计要求。  相似文献   

10.
方树铭 《云南冶金》1998,27(1):49-53
介绍了引进校直机的结构及工作原理,消化吸收了校直辊的设计和加工方法,并针对各种异型材设计了相应的校直辊系。  相似文献   

11.
李舜 《世界有色金属》2020,(3):285-285,287
在设计地质工程开始之前,对工程地质特征进行详细勘查是保证工程设计和施工合理性最有效的手段之一。为此,进行地质工程勘察在工程设计和施工中的作用分析。地质工程勘察在工程设计中的作用包括:判定施工场地地质条件与工程设计的适宜性以及完善工程设计方案;地质工程勘察在施工中的作用为勘测施工场地地基土均匀性。通过对以上的作用分析,致力于为提升地质工程建设的科学性以及综合质量奠定坚实的基础。  相似文献   

12.
Sensitivity of Construction Activities under Design Uncertainty   总被引:1,自引:0,他引:1  
In the quest to shorten project delivery time, construction professionals have the option of overlapping design and construction activities. Although time savings can be achieved by overlapping, conducting design and construction operations in a nonnatural sequence can carry significant risks. To mitigate these risks and make more appropriate overlapping decisions, concurrent engineering concepts can be used to classify upstream design activities in terms of design evolution and downstream construction activities in terms of sensitivity to upstream design changes. The focus of this work is to determine the factors that contribute to the sensitivity of construction activities. A series of semistructured interviews with experienced construction professionals show that the level of transformation, lead time, modularity, and the interaction of built components are some of the factors that determine the amount of sensitivity in construction activities to upstream design changes. These determinants provide for a quick assessment of an activity’s sensitivity, which can help practitioners limit risk when planning the overlapping of design and construction activities.  相似文献   

13.
A dilemma can face design engineers if they have to choose between their perceived and actual responsibilities during construction of the project they designed. This dilemma can be particularly significant for specialized underground construction involving soild‐structure interaction. Such construction represents unique and unusual situations in which design, inspection, and construction functions cannot be separated. Two cases in which specialized construction quality control was not provided by the designer of subsurface structures are reviewed. In both cases defective construction was later discovered and the projects were abandoned. The design engineer is placed at risk when the owner does not agree to engage a knowledgeable specialist for quality control of the construction work. The engineer should identify in writing the risks the owner is electing to accept by contracting for a lower level of quality control than, in the engineer's judgment, is less than prudent for the project.  相似文献   

14.
An analysis of the construction resource utilization tradeoffs, which occur from constructability improvements, provides insight into the constructability improvement process. Matrices of construction and engineering impacts likely to result from constructability improvements are presented. Constructability improvements collected on a large industrial construction project are analyzed for their impact to the job. Frequencies of occurrence of both desirable and undesirable impacts are noted, as are the cost‐significances of the various impact types. Constructability strategies and methods for achieving the most cost‐beneficial impacts are presented. Numerous findings are presented, such as the following: (1) The likelihood of delays may be decreased most effectively by increasing engineering information availability and understandability; (2) the amount of required construction manpower may be most effectively decreased by simplifying the design, combining design elements, and seeking optimal design‐originated construction techniques such as optimal construction systems, modularization, and improved design details. Of course, additional engineering effort may be required; and (3) construction activity durations may also be most effectively decreased by seeking optimal design‐originated construction techniques.  相似文献   

15.
地震灾害与地震区建筑用钢探讨   总被引:1,自引:0,他引:1  
为进一步研制建筑用钢筋的抗震性能,根据"建筑抗震设计规范"对钢材的规定,提出了地震区建筑用钢的研制开发技术要求。为提高建筑物的安全性,在建筑设计时必须按抗震设防要求进行设计。钢材的选用,必须满足结构件塑性铰区实现转动,以耗散地震时能量,提高建筑物安全系数,减少地震损失。  相似文献   

16.
Concurrent design and construction has been lauded for streamlining projects in terms of time. However, such an approach may actually make projects more uncertain and complex than the traditional sequential design and construction process. The main sources of risk that have been identified with concurrent design and construction are iterative cycles that result from unanticipated errors and changes and their subsequent impacts on project performance. As an effort to address these detrimental impacts, a framework for quality and change management that identifies those negative iterative cycles is proposed. The proposed framework is incorporated into the system dynamics model of dynamic planning and control methodology (DPM), which has been developed to evaluate negative impacts of errors and changes on construction performance. Relevant to practitioners and researchers, the potential of DPM as a robust design and construction planning methodology that could effectively deal with errors and changes inherent in the design and construction process is demonstrated through a case study involving the Treble Cove road bridge in Massachusetts.  相似文献   

17.
Success has always been the ultimate goal of every activity, and a construction project is no exception. Due to the ambiguous definition of project success and the different perceptions of participants toward this concept, it may be difficult to tell whether a project is successful as there is a lack of consensus. Time, cost, and quality have long been the success criteria used to evaluate the performance of a construction project. However, such a list has been criticized as not being comprehensive. Even studies of the project success of a particular construction method, such as the design/build procurement system, are lacking in most previous research considering construction projects in general. This paper sets out to establish criteria for project success for a design/build project in construction, first by identifying relevant measures of project success for a construction project in past studies, with particular emphasis on design/build projects, and then by establishing a comprehensive assessment framework for project success for design/build projects. The significant impacts on the construction field of study, in terms of educational value and practical use, are also presented. With little research in the project success of design/build projects, the writers suggest a research focus for the study.  相似文献   

18.
张瑞华  张庆荣 《包钢科技》2002,28(6):66-67,90
大体积砼裂缝问题是建筑业普通关心的问题.对砼裂缝进行控制,就必须研究砼结构中裂缝产生的原因以及在实际的设计和施工过程中采取合理的、经济的措施来控制裂缝.本文通过对大体积砼裂缝成因的理论研究,提出了合理的裂缝控制的设计和施工措施.  相似文献   

19.
陈豪 《世界有色金属》2020,(3):239-239,241
在地质工程施工之前,都需要进行岩土工程的勘察设计,这是施工的前提条件。最终的施工结果与岩土勘察设计和水文地质问题有关。这些方面出现任何问题,都会影响施工的正常进度,影响施工质量,甚至会发生安全隐患,因而,在工程开始施工之前,必须要对水文地质的勘察工作,详细掌握施工地的水文地质问题,做好防御措施,为工程的顺利开展做基础。  相似文献   

20.
The National Institute for Occupational Safety and Health (NIOSH) has funded the establishment of a Center for Excellence in Construction Safety at West Virginia University. The overall objectives of the Center include: (1) The promotion of hazard control components in engineering curricula; (2) the promotion of hazard awareness and safety‐related knowledge and skills specific to the construction industry; and (3) the promotion of the consideration of safety issues during project design for the purpose of reducing injury during construction. Specific tasks to be accomplished by the Center include: (1) The development of course materials and instruction on construction safety for civil engineering students at the undergraduate and graduate levels; (2) the promotion of such course materials for adoption by other civil engineering academic institutions; (3) the design and conduct of projects related to the improvement of current construction practices that would develop design parameters to reduce trauma during the construction phase; and (4) the establishment of techniques for the collection and dissemination of construction safety information, educational materials, developed guidelines, and design criteria to engineers, architects, contractors, and trade unions.  相似文献   

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