小议钢结构工程的防火措施

本文介绍了钢结构建筑的防火设计方法，主要有浇筑混凝土或砌筑耐火砖、轻质耐火材料包覆、喷涂防火涂料、构件内部充水保护法及自防火楼承板等几种被动耐火保护措施，以及采取主动灭火措施的主动保护措施。     

FRC板力学性能分析和材性结构设计

本文采用预测FRC板的复合材料模型,从表面层到夹芯层进行力学性能分析,并根据工程使用的关键力学性能—抗弯强度进行材性结构设计。     

Effect of increased linings on micro-pressure waves in a high-speed railway tunnel

A micro-pressure wave (MPW) is generated when a train enters a tunnel at high speed, which causes a strong impact on the environment around the tunnel. The increased lining used to repair damage in high-speed railway tunnels changes cross-sections and has a strong influence on the MPW at the tunnel exit. In this paper, the methods of full-scale measurement, numerical simulation and moving-model experiments are used to study the MPW generated in a tunnel whose lining is increased. The rules governing the effect of increased linings on MPWs are obtained, which can be used as a reference for the Tunnel Damage Regulation Project in China.     

盾构通用衬砌环楔形量计算及应用

本文结合长沙地铁通用衬砌环拼装实例，分析了单环衬砌环不同点位拼装对平曲线、竖曲线所提供的空间转角矢量及楔形量的影响值，希望对拼装时点位选择、盾构姿态调整有一定的意义。     

改性聚苯板与传统聚苯板的性能特点分析

解释了膨胀聚苯乙烯泡沫板(EPS板)、石墨模塑聚苯乙烯泡沫塑料板(SEPS板)和热固性改性聚苯乙烯泡沫塑料板(热固性EPS板)的定义,对6个不同厂家生产的EPS板、SEPS板、热固性EPS板的主要物理性能进行了研究,得出了一些有实用价值的结论。     

地面出入式盾构法隧道施工技术研究综述

地面出入式盾构(GPST)由日本株式会社大林组研发,作为一种新型盾构隧道施工方法,无需传统盾构的端头工作井,明显减小对周围环境的影响,同时缩短工期。该技术目前的实践工程较少,存在多方面工程技术难题。根据已有研究资料,阐述地面出入式盾构的相关技术难题,主要从隧道衬砌、盾构姿态、同步注浆等几个方面进行总结,分析现有研究不足之处,提出需要进一步研究的方向和研究思路。     

电路板芯片级修复在X射线荧光光谱仪维护中的应用

X射线荧光光谱仪(XRF)在国内的冶金、矿山等行业的实验室有着广泛的应用。以ARL9900系列X射线光谱仪为例,介绍了其XPS电路板上光耦合芯片和XPSI电路板上IGBT芯片损坏故障的故障现象和报警信息,以及如何利用电路原理和电子知识进行电路板上损坏元件的检查和处理。通过这两个典型的电路板芯片级故障处理方法,为实验室精密仪器的芯片级故障修复提供一种思路,帮助企业快速恢复生产,节约备件成本。     

Rolling Kanban: a new visual tool to schedule family batch manufacturing processes with kanban

Rolling Kanban is the name of a kanban management methodology for batch processes manufacturing environment. Proposed in the early 2000s by FESTO Consulting, for two decades we have lost knowledge both from operative and scientific point of view. Basically, Rolling Kanban means a visual planning methodology based on the production of product-families and variants where: (i) set-up times are reduced between the products of the same family, and (ii) relevant times (dozens of minutes if not even hours) must be considered for changeover between products of different families. In addition, the cyclic production sequence between different product families cannot be maintained. Considering that very few technical information and documents are available about this approach, the main objective of this paper is to retrieve and present, for the first time to the scientific community, the Rolling Kanban methodology. Besides, a real industrial implementation concerning a manufacturer of domestic fittings is discussed as a case study. More specifically, two novel versions of the original Rolling Kanban technique are fully presented to effectively overcome certain limits and criticalities found during its operative use, such as the difficulty to realise a pull production, considering increased set-up time for changeover between products of different families.     

Geosynthetics for waterways and flood protection structures – Controlling the interaction of water and soil

The interaction of water and soil has been both a blessing and a curse in all times within living memory. Water is the origin of life but is also threatening life when appearing unboundedly. Therefore mankind has always worked hard to benefit from water resources on one hand and to deal with the threat of flooding on the other hand. For both, to protect the land and to allow for beneficial uses like irrigation or navigation, often special measures are necessary to keep the water within certain bounds. Structures to achieve a permanently stable situation like irrigation and navigational canals, river training or flood protection measures need suitable material, carefully thought out design and accurate execution. Often a decision has to be made among competitive approaches to optimize such structures. In many cases, geosynthetics can support or improve the functionality and sometimes only with geosynthetics the desired result can be achieved.     

外墙岩棉保温板钢丝网软配筋薄抹灰施工技术

以岩棉保温板、钢丝网软配筋薄抹灰施工技术在某民用建筑工程外墙保温系统施工过程中的应用为例,阐述了此种方法的工艺原理与工艺特点,重点对其工艺流程和操作要点进行了论述,并提出了该工艺的质量与安全控制措施,以促进该方法在行业内的推广应用。