盾构施工引起的地层变形分析

针对地铁盾构施工的地层变形特征,分析引起地层变形的因素和变形机理,介绍地层变形预测分析方法,结合广州地铁具体实例,对地铁盾构隧道施工中地层变形进行了预测和分析,提出了盾构前方的隆陷控制、盾构通过时的沉降、固结沉降的控制等控制地层变形措施。     

地铁隧道盾构穿越高架桥桩基托换工程计算分析

为有效计算地铁隧道盾构穿越高架桥桩基托换施工前后桥梁承台及桩基受力的变化情况,保证桩基托换工程的顺利进行,本文依托厦门市轨道交通6号线隧道盾构下穿跨杏林湾路高架桩基托换工程,结合桩基托换工程特点和工程现场的实际情况,利用MIDAS/fea与MIDAS/civil建立桥梁桩基托换三维数值模型和梁单元模型,并通过该模型对施工现场的桥梁桩基托换工程进行数值计算,重点分析桩基托换施工中新建承台及桩基承载力的变化情况,据此提出桩基托换施工质量的控制措施,保障桩基托换工程质量,为类似工程的顺利建设提供理论指导与参考。     

Effects on Microstructure and Properties of Brass Treated by Laser Shock Processing

Laser shock processing （LSP） has been proposed as a new surface treatment for improving hardness, wear resistance and fatigue. In this paper, the effect of LSP on brass is investigated with experiment. Micro-hardness, roughness, microstructure, wear resistance and friction coefficient evolution are investigated for different parameters of LSP. The result shows that the roughness increases after LSP; no ablation is observed; the microstructure has no remarkable ehange; hardness and the wear resistance increase as the pulse density increases.     

孤山隧道施工中存在问题的探讨

在孤山隧道前期开挖、支护、量测、通风等施工过程中，工程技术人员贯彻“少扰动、旱喷锚、勤量测、紧封闭”的原则．采用正确和有力的施工措施，使工程得以顺利进行。     

银行监管国际化:理念、模式与方法

在金融全球化和银行国际化的发展趋势下，监管国际化已经成为不可回避的必然选择，本文对这一课题进行了初步的系统化探讨。在回顾我国银行监管国际化的进展及分析现存问题的基础上，本文阐述了监管国际化的基本内涵，并提出了包括理念、模式、方式方法等在内的我国银行监管国际化的总体框架安排。     

Switch Panel wear loading – a parametric study regarding governing train operational factors

The acting forces and resulting material degradation at the running surfaces of wheels and rail are determined by vehicle, track, interface and operational characteristics. To effectively manage the experienced wear, plastic deformation and crack development at wheels and rail, the interaction between vehicle and track demands a system approach both in maintenance and in design. This requires insight into the impact of train operational parameters on rail- and wheel degradation, in particular at switches and crossings due to the complex dynamic behaviour of a railway vehicle at a turnout. A parametric study was carried out by means of vehicle-track simulations within the VAMPIRE® multibody simulation software, performing a sensitivity analysis regarding operational factors and their impact on expected switch panel wear loading. Additionally, theoretical concepts were cross-checked with operational practices by means of a case study in response to a dramatic change in lateral rail wear development at specific switches in Dutch track. Data from train operation, track maintenance and track inspection were analysed, providing further insight into the operational dependencies. From the simulations performed in this study, it was found that switch rail lateral wear loading at the diverging route of a 1:9 type turnout is significantly influenced by the level of wheel–rail friction and to a lesser extent by the direction of travel (facing or trailing). The influence of other investigated parameters, being vehicle speed, traction, gauge widening and track layout is found to be small. Findings from the case study further confirm the simulation outcome. This research clearly demonstrates the contribution flange lubrication can have in preventing abnormal lateral wear at locations where the wheel–rail interface is heavily loaded.     

大体积混凝土的温度监测及控制技术措施

在大体积混凝土施工中,温度裂缝是最易产生的病害,也是施工控制的重点和难点.对于大体积混凝土的浇筑,由于混凝土体积较大,混凝土内水化热作用产生的温度升高较快,而体积大散热较慢,致使混凝土体内温度较高、混凝土表里温差较大,极易引起混凝土开裂.因此,对大体积混凝土进行温度监测并实施有效控制十分必要.通过在混凝土内布设温度传感监测系统进行温度监测,并在混凝土内埋设通水冷却系统,根据温度监测数据实时进行有效的温度控制,以降低混凝土体内温度,减少表里温差,使混凝土表里温差始终处在允许范围内,避免温度裂缝的产生,保证大体积混凝土的工程质量.     

基于汽车生产制造过程的质量管控措施

对于汽车产品顾客关注的主要是产品价格、配置、质量、售后服务、市场口碑等,而在这诸多因素中客户最为关注的还是产品质量。本文就制造过程质量管理的目标、环节、要素和方法来对汽车制造过程质量管理进行分析,结合生产现场对制造过程中力矩管理、工艺参数管理、关键/特殊工序管理、工艺纪律管理、典型质量问题管理5个方面的管理方法和手段进行论述。     

Traffic safety,usability and streetscape effects of new design principles for major urban roads

An important aspect of area-wide traffic calming concepts is the integration of major urban roads, because 70 to 80 percent of all urban accidents occur on major roads. Traffic calming which is primarily based on the locational shift to such main thoroughfares is socially injust, because — in spite of all disturbances on those streets — about one quarter of the urban population live there. Social justice can only be somewhat achieved if the expenditures for traffic calming and streetscaping are not used — as today is most common — for accumulating the advantages in the low traffic side streets, but aimed at a partial balance and compensation for the strains caused by car traffic on the major streets. Some compensatory measures and new design principles will be discussed. Backgrounds are the experience in six German model cities of area-wide traffic calming, several research projects and the discussion about new guidelines for major urban roads. Where traffic and environmental burdens focus, the concentration concept should be extended by compensatory measures. That is the state of discussion in Germany examplified by nine topics.This is an edited version of a speech presented by the author at the International Conference Living and Moving in Cities in Paris, January 1990.     

基于有限元盾构开仓开挖面稳定性及施工技术研究

以广州地铁4号线塘—大区间盾构隧道为依托,针对盾构开仓开挖面稳定及施工技术展开研究。采用有限元分析方法,对盾构开仓开挖面破坏形式、开挖面变形和开挖面前方地表沉降三方面进行稳定性分析,得到相应规律;从盾构开仓刀盘后止水措施、开挖面泥膜质量控制和盾构开仓期间监测措施三方面对盾构开仓开挖面稳定施工技术进行研究,并提出主要相关参数。盾构开仓期间,利用盾构外壳预留孔采用高压注浆方式向盾构周边注入1.10~1.15 g/cm;的高粘度浆液,以免浆液流失;工程遵循"高稠度、高密闭、低比重、易成膜"措施,调整泥浆参数,同时对所选泥浆材料进行优化;采取加密监测频率方式,周边地表监测频率为8次/d。最后给出开挖面异常工况处理措施,并将该方案应用于实际,取得良好效果,为大湾区盾构开仓开挖面稳定提供工程参考。