铁路客运专线连续梁上跨公路桥施工技术

结合具体工程实例,通过对跨桥施工方案的比选和计算,确定了墩梁式的支撑结构形式,并介绍了客运专线上跨公路桥的施工工艺,可为同类工程施工提供参考和借鉴。     

跨线桥预制梁上跨铁路施工工艺

针对平阳高速太原枢纽BK0＋563．5匝道桥第二联预制梁上跨北同蒲铁路施工工艺作了详细介绍，并借用工程实例进行了剖析，对施工工序、施工方法及注意事项进行了阐述，以供参考。     

Monitoring of traffic action local effects in highway bridge deck slabs and the influence of measurement duration on extreme value estimates

In recent years, monitoring has offered a viable complement or even alternative to traditional analytical safety verification approaches. However, there still remains a lack of guidance for the use of monitored data in safety verification work. Limited resources often necessitate relatively short time frames for safety verification of problematic bridges. While the duration of monitoring is always an important consideration, it is rarely examined explicitly in terms of its influence on the predicted characteristic action effects. This work gives a novel approach for determining if a monitoring regime is sufficiently long to obtain a reliable extreme value estimate of the action effect. A case study of a highway bridge in Switzerland, with one year of continuous high-frequency measurements, is used to exemplify the approaches developed. The focus is on direct measurement of the traffic action effects in the bridge's deck slab reinforcement. A comprehensive statistical approach for determination of site-specific, element-specific extreme traffic action effects is presented.     

CFG桩在桥梁地基处理中的应用

以某扶壁式桥台地基处理为例,介绍了CFG桩在桥梁地基处理中的应用,可为地质条件和建筑环境较差、跨径较大的桥梁设计建造,提供新的墩台基础参考型式。     

基于传统理念和创新意识的意大利城市桥梁

本文系统地介绍了笔者考察南欧国家一意大利期间,对罗马、威尼斯、米兰和佛罗伦萨等城市的城市桥梁建设的总体印象和分类考察情况,重点介绍了其古老桥梁和现代大跨径桥梁的建设概况,并得到了相关的感悟,希望相关内容能为同行们提供有借鉴意义的资料和启示。     

浅谈公路小桥涵工程冬季施工

结合实际需要、施工管理经验及相关技术规范要求,详细介绍了公路小桥涵冬季施工值得注意的几个方面,从而保证冬季施工工程质量,加快施工进度,为保质保量完成工程建设任务创造了条件。     

门式支架法在鳌江大桥简支箱梁施工中的应用

温福铁路鳌江大桥连续梁墩身宽,部分还低于5m。经反复比较,简支箱梁采用已在高速铁路中成熟应用的门式支架法施工。着重介绍了施工中由贝雷梁和钢管支柱构成的门式支架支撑系统以及理论检算和挠度计算。最后介绍了主要施工工序和施工工艺。     

转体施工拱桥合龙误差对全桥影响可靠度分析

探讨了转体施工拱桥合龙误差的成因,深入研究了转动轴的定位误差分析,推导出转动轴定位偏差产生跨中合龙偏差的计算公式。通过结构力学方法和平面有限元模型相结合分析了合龙误差对钢箱拱肋的力学性能影响。     

两河口水电站白孜大桥主桥设计

指出两河口水电站白孜大桥主桥为上承式钢筋混凝土空腹箱形无铰拱桥，较详细地介绍了该桥的设计及构造特点，上部结构内力计算及上、下部结构设计等，以期为类似条件下拱桥的设计积累经验。     

桥头跳车问题探讨

针对目前普遍存在的桥头跳车现象,从路基沉降、设计施工方法和结构体系方面出发,对桥头跳车病害产生原因进行了分析,同时提出减少病害的防治措施,从而改善行车条件,促进经济发展。