钻孔灌注桩和钢撑体系在深基坑支护中的设计与应用

本文针对我国深基坑工程的发展特点,总结了深基坑支护的研究成果。通过对天津空港物流加工区市政污水厂项目深基坑支护结构的研究,总结出了适合滨海新区软土场地条件的深基坑支护方案,希望为其他类似工程积累经验。     

谈商业办公建筑侧窗采光创新设计措施

侧窗采光利用自然光源为建筑内部营造了优越的办公环境,为商业经济的可持续发展提供了设施性保障。本文分析了侧窗采光应用要点,总结了侧窗采光设计需参考的相关标准,提出了侧窗采光设计创新的具体方法。     

关于办公楼装修工程质量控制的探讨

在现代建筑工程中,装修工程以其独特的色彩和线条的科学运用,使建筑物的外观以及功能更加完善,其对办公楼装修工程和质量的控制有着十分重要的意义。     

工程造价影响因素分析及降低工程造价措施

当前,随着城市化进程的不断深化以及人口的增加,建筑行业也相应的增加,并且伴随着国外建筑企业对于我国建筑市场的冲击,我国很多建筑企业面临着非常严峻的竞争形势。因此,在工程建筑过程中必须加强对工程造价的控制。     

房地产经济影响因素及发展策略创新思考

近些年来,我国的房地产业得到了较快地发展。本文从实际出发,分析了我国房地产经济发展中的影响因素以及相关发展策略。     

基于城市区域的微型住宅探究

城市区域人群密集,用于居住的空间已经很少。因此,住宅空间更偏向紧凑智能多变。本文介绍了微型住宅的特征,总结了相关案例,对微型住宅可能的问题进行了评估,并提供了建议。希望微型住宅能够在城市区域中合理健康地存在和发展。     

浅谈电梯轿厢意外移动的原因及其预防

如果电梯到站平层后,乘客正陆续进出开着门的轿厢,这时轿厢突然向上或向下移动,结果会怎样？事实上这种情况在全国时有发生并造成了人员伤亡的严重后果。前不久笔者所在单位的辖区一台使用多年的乘客电梯也发生了类似的情况。业界把电梯轿厢在开着门的情况下的移动（运行或溜车）叫意外移动。那么造成轿厢意外移动的原因有哪些,平时大家如何进行预防呢？笔者结合在电梯检验工作中发现的一些问题,进行一些分析并提出一些建议,供电梯同仁参考。     

荷兰国家基础设施与空间规划战略的评估与启示

荷兰的空间规划作为公共政策的典型,其规划评估体系十分先进成熟,覆盖了规划的编制与运行的全过程。与此对照,我国城镇规划的实施评估刚刚起步,尚未形成连续动态的评估系统。本文介绍了荷兰于2012年出台的《国家基础设施与空间规划战略》的制定过程,并对其实施前后的规划评估体系进行了深入研究,重点评述了实施前评估中的预评估和战略环评的内容、方法及程序,探讨了各阶段评估的意义及对规划的影响,并对我国规划评估机制的完善提出若干建议。     

Legal title,tenure security,and investment—An empirical study in Beijing

Small property rights (SPR) housing is an informal way to provide housing for residents in Chinese cities. In this paper, we examine the institutional framework and development of SPR properties in China. Using survey data collected in Beijing, we investigate perceived tenure security and the relationship between legal title and investment in home improvements. We consider both the importance and the limitations of the legal dimension, as well as de facto situations of urban land uses, in order to gain a better understanding of property rights and urban development issues. Our results reveal that the characteristics of buildings and residents in SPR communities are not much different from those of commercial housing properties. The residents have a fairly high degree of tenure security even when their properties are not formally recognized by the state. Nevertheless, our results indicate that the absence of a legal title is effective to discourage the owners of SPR housing properties to invest in their properties.     

The basic properties of some typical systems’ reliability in interval form

A proper mathematical representation of uncertainties is indispensable for reliability analysis of a practical engineering structural system. A general uncertainty analysis approach is probability bounds analysis (PBA), which propagates constraints on a distribution function through mathematical operations. The uncertainty about a probability distribution is represented by the set of cumulative distribution functions lying entirely within a pair of bounding distribution functions, which is called a P-box. Interval analysis as a special case of PBA is useful when there is no or less probabilistic information. It is common sense that great efforts must be paid to get enough probabilistic information used for probabilistic analysis of large and complex engineering structural systems. Even if there is no or less probabilistic information; the interval of possible values of probability of an event can be easily specified, such as the interval value of each element’s reliability of an engineering structural system.

This paper aims to introduce the concept of system reliability and its relationship to the reliability of its individual elements in an interval form. In terms of extension principle, interval arithmetic and possibility degree formula (PDF) for ranking interval numbers, basic properties of system reliability in interval form are investigated. The conclusion is that relationships between point reliability (point reliability used to describe a precise value of probability reliability is distinct with interval reliability) of some typical systems, such as series system, parallel system, series–parallel system, parallel–series system and r/n(G) system, etc., and point reliability of their individual elements are maintained in their interval forms. This is called quasi-consistency in this paper. A simple review of order relations of interval numbers, which will play an important role in interval reliability analysis, is given. The proposed quasi-consistency establishes the foundations for interval reliability analysis of a complex engineering structural system.