预应力宽混凝土枕轨道施工技术

阐述了预应力宽混凝土枕轨道施工技术。     

High-Speed Rail Operations on an Existing Network: An Assessment Model for China

High-speed rail operations have the potential to reduce the long-term decline in rail passenger travel demand for the medium to long distance inter-urban markets. Such decline has been evident through most of the industrialized countries where air and road transport tend to be the dominant modes. In China, the operations of long distance high-speed rail on fully dedicated track is not very easy to implement, due to the high proportion of passengers who travel between high-speed and conventional railways. An alternative approach would be to allow for mixed operations with trains of various speeds on the same track. This article puts forward a simulation model designed to allow an evaluation of the most efficient distance for high-speed rail operations under mixed train speed scenarios. The model takes into account the main operating parameters such as passenger volumes, train speeds, capital and maintenance costs, train operating costs and energy consumption. The distance of high-speed train running on conventional rail that will yield the most economic benefit can be estimated using the model. The article includes the results of using the model for a specific example. It is concluded that large-scale high-speed trains have the potential to be successfully operated on conventional rail networks.     

大型上建总段双车联吊工艺研究

针对某9 400 TEU集装箱船大型上建总段因结构尺寸和质量超过单台龙门起重机的起吊极限这一问题,根据上建总段的结构特点,结合船厂设备设施的条件,提出双车联吊工艺方案。采用船体吊装模拟分析软件对上建总段吊装过程进行模拟仿真,计算双车联吊工艺条件下船体结构的变形和受力情况,完成吊装方案的校验,从而保证该上建总段的顺利吊装。     

岩溶地区公路工程病害防治技术

通过广泛调研分析,揭示了岩溶地区公路工程病害的成因机理,提出了岩溶地区公路工程病害防治的基本原则,以及岩溶水控制和岩溶地基处理的多种具体防治措施。     

连续箱梁节段预制安装施工技术

文章依托具体工程实例介绍连续箱梁节段预制安装施工方法及原理，详细阐述了架桥机安装施工流程、步骤和方法，分析了预制安装施工的关键技术。     

纤维改性稀浆封层技术在鞍山鞍羊线推广应用

介绍了纤维改性稀浆封层技术在鞍山鞍羊线上的推广应用情况.     

纤维封层技术的引进与应用

纤维封层技术以其优越的性能和广泛的适用性在国外广为应用。营口市公路管理段率先引进纤维封层设备和技术,首次应用于国内路面维修工程,效果良好。结合路面纤维封层施工,介绍纤维封层施工工艺与应用。     

冷再生技术在旧路改造中的应用

沥青路面再生利用,能够节约大量的沥青、砂石等原材料,同时有利于处理废料、保护环境.就地冷再生技术在辽宁特别是营口地区已得到广泛应用,并逐渐被交通领导部门推广,从辽宁省就地冷再生的首例试验路为基础,介绍了就地冷再生的应用过程.     

我国电动汽车的发展现状及对策

分析了国内外电动汽车的发展现状，并从我国电动汽车技术发展状况入手，着重分析了我国电动汽车发展的优势，如燃料电动汽车整车集成技术、电机和驱动系统、电动汽车的4轮驱动、电动机及其控制技术等取得的进展。指出了在整车技术、电动汽车关键技术、电动汽车标准、基础设施建设及知识产权等方面存在的不足，从而有针对性地提出我国电动汽车的发展对策     

农村公路路基防护技术和结构型式的探讨

在分析农村公路防护现状的基础上,结合各地经验和成熟的路基防护技术和结构形式,对农村公路适宜采用的防护技术和结构形式进行了探讨。