西安铁路枢纽北环线重点桥梁运营管理及养护

针对桥梁养护的重要性,结合具体工程实例,详细介绍了连续刚构、拱桥及连续梁的养护维修技术条件与要点,以保证及时处理桥梁缺陷,从而确保桥梁的正常营运,延长桥梁的使用寿命。     

某连续刚构桥梁静力试验检测案例分析

以某连续刚构桥梁静力试验检测案例为依托,详细的介绍了连续刚构桥梁静力荷载试验结构验算及内力计算、主要试验内容、试验截面、试验工况、测试系统、试验分析、桥梁承载力评定,了解结构当前实际工作性能和工程质量,识别结构现有状态,为维修和养护提供依据,该案例为类似工程提供借鉴。     

对连续刚构桥梁施工控制技术的探讨

随着桥梁设计施工技术的进步，连续刚构桥梁的施工质量在逐渐提高，但是当前的连续刚构桥梁施工在控制方面仍然存在一些问题。本文首先简要介绍了连续刚构桥梁施工控制内容，并对控制上存在的问题作简要的分析，进而提出加强施工控制的建议和意见。     

大跨度连续刚构桥梁施工控制关键问题分析与研究

大跨度连续刚构桥梁是桥梁施工过程中应用比较广泛的一种模式,但是对于大跨度连续刚构桥梁的施工过程中易造成一些问题。本文主要针对大跨度连续刚构桥梁施工控制关键问题进行分析和研究,主要从几个方面进行分析,首先基于大跨度连续刚构桥梁施工控制的基本理论和方法进行分析,接着对大跨度连续刚构桥梁施工控制的误差进行分析,并对其主要影响因素进行分析。最后基于大跨度连续刚构桥梁施工控制过程中的线性控制和应力控制进行整体分析,进而满足大跨度连续刚构桥梁施工的相关要求。     

混凝土连续刚构桥梁关键技术研究

针对大跨度预应力混凝土连续刚构桥梁成桥后普遍存在“腹板开裂”、“跨中下挠”等质量问题,综合分析研究了国内外大跨度连续刚构桥梁现状,探讨了大跨度预应力混凝土连续刚构桥梁设计理论和施工工艺的优化和更新。     

大跨度连续刚构桥梁施工控制关键问题的分析

以清川河大桥为例,在大跨度连续刚构桥梁施工控制方法的基础上重点分析了大跨度连续刚构桥梁施工控制的主要影响因素,并提出了相应的控制措施,以期对于大跨度连续刚构桥梁施工的相关要求能够得到满足。     

连续刚构桥梁的施工监测与控制

对连续刚构桥梁的施工监控进行了分析,提出了施工监控系统建立的原则,明确提出了施工监控过程中各参建单位的分工、主要任务及控制程序,以加强连续刚构桥梁的施工监测与控制,保证连续刚构桥梁的质量。     

不等跨连续刚构桥桥梁荷载试验检测技术的发展与应用现状

通过对不等跨连续刚构桥梁和桥梁荷载试验检测技术进行概况分析,探讨不等跨连续刚构桥梁荷载试验检测技术的发展和应用现状。     

大跨度连续刚构桥地震易损性探讨与研究

以大跨度连续刚构桥梁为研究对象,概括了此类桥梁的震害现象,论述了桥梁地震易损性分析的研究进展,并进一步探讨了大跨连续刚构桥梁地震易损性分析方式,研究成果对于此类桥梁结构进行抗震设计和抗震鉴定加固都具有重要的意义。     

诌议连续刚构桥梁的施工管理控制

本文结合具体连续刚构桥梁的施工案例进行分析,总结了连续刚构桥梁施工管理控制的必要性以及施工控制方法等,为施工技术的完善提供了方法和建议。     

浅析公路桥梁养护对策

针对桥梁缺少有效养护与监管的问题,提出了完善组织机构、设立专业养护队伍、严格桥梁检查制度以及建立桥梁档案等来规范桥梁的管养工作,并探讨了搞好危桥改造的措施,从而为桥梁养护工作提供了一些参考依据。     

谈桥梁养护管理存在的问题及相应对策

介绍了已经破坏的桥梁表现出的问题,分析了公路桥梁的改造现状,阐述了桥梁养护管理的对策,提出了加强桥梁养护管理的几点建议,以期指导实际中的桥梁养护和管理工作,确保桥梁结构的安全。     

Bridge Maintenance Level Assessment

Parameters in assessing the effectiveness of maintenance tasks on the overall cost of a bridge or system of bridges are identified and the linkage among maintenance, condition rating, and cost is made by subdividing the subjective process into smaller parts. Experience with New York City bridges is used to develop a life expectancy model once the maintenance and repair protocol is specified. Results for several sample maintenance allocations are given to show how a rapid spreadsheet calculation can provide a basis for comparing maintenance alternatives and to point in the direction of an optimized allocation of limited budgets.     

旧石拱桥加固维修技术的应用

分析了对原有旧石拱桥进行加固维修的必要性,结合具体工程实例,对桥梁的病害情况进行了分析,探讨了旧石拱桥加固设计原理,详细地介绍了旧石拱桥加固维修的施工过程,以积累旧桥加固经验,保障公路行车安全。     

吴江市城市桥梁安全情况调研和管理工作开展

通过对吴江市城市桥梁调查资料的梳理,对吴江市城市桥梁的分布情况和安全状况作了初步的调研。针对现状,对今后城市桥梁的病桥养护、定期检测和管理工作措施的开展作了展望。     

Life-cycle cost analysis of a TPSM applied continuous composite girder bridge

Transverse cracks in composite girder bridges are repeatedly reported because the tensile stresses in the concrete deck induced by the negative bending moment at the intermediate supports of continuous composite girder bridges. The occurred transverse cracks rapidly deteriorate the concrete deck, giving rise to frequent need for maintenance work. Prestressing methods are usually utilized in this kind of situation for the concrete structures, however no effective and feasible method has yet been proposed for steel-concrete composite structures. A new type of prestressing method entitled Thermal prestressing method (TPSM) has been proposed for innovative construction of continuous composite girder bridges, as effective prestressing method to prevent the occurrence of the tensile transverse crack of the concrete deck at the negative bending moment regions. In this study, the methodology for the economic analysis of TPSM applied bridges and case studies are introduced based on the life-cycle cost, considering initial construction cost and maintenance cost, to demonstrate the financial viability of the TPSM applied bridges compared to conventional continuous composite girder bridges.     

Critical issues,condition assessment and monitoring of heavy movable structures: emphasis on movable bridges

In this paper, a relatively less studied class of structures is presented based on the research conducted on Florida's movable bridges over the last several years. Movable bridges consist of complex structural, mechanical and electrical systems that provide versatility to these bridges, but at the same time, create intermittent operational and maintenance challenges. Movable bridges have been designed and constructed for some time; however, there are fewer studies in the literature on movable bridges as compared to other bridge types. In addition, none of these studies provide a comprehensive documentation of issues related to the condition of movable bridge populations in conjunction with possible monitoring applications specific to these bridges. This paper characterises and documents these issues related to movable bridges considering both the mechanical and structural components. Considerations for designing a monitoring system for movable bridges are also presented based on inspection reports and expert opinions. The design and implementation of a monitoring system for a representative bascule bridge are presented along with long-term monitoring data. Various movable bridge characteristics such as opening/closing torque, bridge balance and friction are shown since these are critical for maintenance applications on mechanical components. Finally, the impact of environmental effects (such as wind and temperature) on bridge mechanical characteristics is demonstrated by analysing monitoring data for more than 1000 opening/closing events.     

高速公路混凝土桥梁预防性养护研究

从高速公路混凝土桥梁常见的病害分析着手,论述了桥梁预防性养护的重要性,并从混凝土桥梁预防性养护管理与技术两个层面进行了深入的研究,结合随岳高速公路桥梁养护实际,提出了高速公路混凝土桥梁养护对策。     

湖北京珠高速公路桥梁养护分析

为确保高速公路的安全,桥梁养护至关重要,湖北京珠高速公路全长339 km,全线主线共有桥梁143座,于2004年1月开始全面实施社会化养护。文章对3年来桥梁检查、评定、维修等养护情况进行了分析,从养护效果来看,湖北京珠高速公路桥梁社会化养护模式是可行的。     

农村公路桥梁养护管理的思考

结合海南农村公路桥梁的现状情况,通过对桥梁病害原因的分析,阐述了农村公路桥梁在养护管理过程中存在的问题,并就如何做好农村公路桥梁养护管理提出了具体的建议,以提高农村公路桥梁的技术状况和安全水平。