矩形型钢弯曲回弹曲率半径r值的确定

文章在分析矩形型钢弯曲变形过程及应力与应变等方面的关系的基础上，推导出工件曲率半径与工件回弹后曲率半径之间的关系，从而确定了凸模半径。     

Development of Full Automatic External Welding Machine for Annular Welds of Pipeline

To meet the demands of rapid development of pipeline constructions in China, a complete set of full automatic external welding machine for annular welds of pipeline and welding procedure have been developed thereof. The system has been applied in the “West-East Pipeline Project” and its performance is proven. With this welding machine the welding parameters can be either preset before or adjusted in real time during the welding process, which avoids the blemishes of same type domestic and international products. Thus it is best propitious to in-situ construction conditions and workers‘ technical level in China. In this article the development of mechanical and control systems of this product is introduced and typical welding procedure parameters are provided.     

钢管单芯棒圆周剪切法的实验研究

介绍钢管圆周剪切的另一种方法－单芯棒圆周剪切法。通过运动学分析阐述了剪切金属的变形原理；实验研究证明了该方法的可行性并对切口断面质量进行了分析。     

Principle of Mangling Correction of Plate-welding Section Steel and its Application

Thanks to the fantastic development of power, transportation, chemical engineering, architecture and other fields, there has been an increasing demand for new type of section steel with large sections used for construction frame, such as type-H, type-T, and type-C section steel. New types of section steel usually are long and with large cross section. Therefore, for the sake of the cost, steel plate welding structure is used home and abroad. During the welding process, welding distortion seems unavoidable. ...     

小区暖气失调原因调查和改造方案的实施

通过对镇苑小区采暖情况的跟踪调查及数据采集，找出了供暖系统不热的原因，据此对系统进行了针对性的改造，取得了良好的改造效果。     

钢结构发展现状与对策

首先简要地介绍了国内外钢结构的发展现状，尤其是我省发展钢结构的前景和存在的主要问题，同时在分析论证的基础上，提出了在我国加入WTO后推广钢结构的对策和措施。     

FBE复合覆盖层天然气管道外防腐施工实践

简述了天然气集输设施腐蚀的危害。结合工程实践。介绍了FBE复合覆盖层天然气管道外防腐施工方法及施工工艺，从防腐材料的选择、施工环境温度的控制、涂料的配制等方面对施工技术措施及质量控制要点进行了重点阐述。     

基于长期计划的动态给水管网优化设计模型

鉴于给水管网的优化设计的重要作用，提出了更符合实际、准确度更高的基于长期计划的动态给水管网优化设计模型。其目标函数中，动力费采用与时间相关的函数计算，折旧大修费采用与管段损坏率相关的函数计算，并建立了相应的动态优化设计模型。可以更精确地得出基于长期计划考虑管网优化设计结果。     

水下沉桩施工新技术

肇庆换流站供水工程之一的五尺峡取水泵站施工中，在受施工条件限制的情况下，采用将钢筋混凝土预制桩改为开口钢管桩，将双排桩改为单排桩，尝试搭设水上竹平台作沉桩施工平台等措施均取得成功，保证了质量、安全、进度，降低了施工成本．