关于建筑地下防烟楼梯间前室送风问题的探析

防烟排烟系统是现代建筑防火的重要组成部分,尤其是地下建筑和高层建筑的兴起,加深了人们对建筑防排烟系统的关注度。《建筑防烟排烟系统技术标准》的出台在建筑防烟排烟领域具有里程碑意义,使得建筑防烟排烟设计的实用性和科学性得到了极大提高。但在建筑地下防烟实地调研中发现,设计和应用还是存有少许不清晰的地方。针对这一问题,本文对该技术标准的某一方面展开探讨,以期为相关工作起到参考作用。     

《建筑防烟排烟系统技术标准》中的防排烟设计研究

国家标准《建筑防烟排烟系统技术标准》GB51251-2017即将实施。主要对《建筑防烟排烟系统技术标准》GB51251-2017的条文中的关于加压送风、储烟仓、防烟设施的设置等一些新提法以及重点内容进行简单分析,重点对比了防烟系统设计计算中新旧标准的不同,并举例说明。对标准中对排烟系统设计的要求进行了简要分析和介绍。     

高层民用建筑防排烟系统设计的几个问题

本文对高层民用建筑地下室排风排烟,防烟楼梯间及其前室、消防电梯前室或合用前室等防排烟系统设计的有关问题进行探讨,并为防排烟系统设计提出建议     

高大空间建筑防烟分区设计方法研究

基于现行规范中的有关条款及工程实际,总结并指出高大空间在进行防烟分区划分时可能出现的问题。结合工程案例,分析了对于高度大于6 m的高大空间采用逻辑防烟分区时的排烟系统设计方法,为大空间建筑排烟系统合理设计提供参考。     

建筑防排烟系统设计中的问题与应对

防排烟系统是建筑中的重要组成部分,意义重大。结合实例,分别对防烟设计和排烟设计进行了分析,指出了其中可能出现的问题,并采取了相应的解决措施。最后,对防排烟系统在多层建筑和高层建筑中的不同做了简单介绍。     

某高层建筑的防排烟设计

本文结合工程实例,探讨高层建筑防烟楼梯间及其前室、防烟楼梯间和消防电梯合用前室的防烟设计;地下储藏室、地上商场大面积空间、自动扶梯、地下汽车库的防排烟设计,阐述高层建筑防排烟系统的设计要点,并且在设计汽车库、商场等大面积场所防排烟系统的同时,兼顾平时通风。     

某高层建筑集中排烟系统优化设计

以某医院病房楼为工程实例,详细介绍了排烟问题的一般设计方法。为了实现建筑防排烟系统性能最优经济最优同时又符合现有规范,在工程设计中采取了细分防烟分区的方法。通过比较得知优化后的排烟系统性能明显提升。同时也验证了细分防烟分区是一个有效解决排烟系统压力分布不均的方法。     

赣江明珠办公楼防烟排烟系统设计

针对新规范GB 50016—2014建筑设计防火规范(2018年版)和GB 51251—2017建筑防烟排烟系统技术标准的实施,论述了超高层建筑如何设计防烟、排烟系统,以及防、排烟系统的控制方法,以供参考。     

丙类厂房的建筑排烟系统设计要点分析

《建筑防烟排烟系统技术标准》(GB51251-2017)发布实施后,丙类厂房的建筑排烟系统的设计内容、设计难度一并增加,文章结合设计实践,从确定厂房净高、划分防烟分区、选择排烟方式、计算排烟口面积、设置补风系统等方面,对丙类厂房的建筑排烟系统设计进行简要探讨。     

中庭烟气分层及其与排烟设计相关性问题探讨

追溯了烟气分层的定义及相关问题的由来,讨论了建筑中庭发生烟气分层的条件和表现形式及其预估方式,分析了分层对排烟系统设计的影响.认为GB 51251-2017《建筑防烟排烟系统技术标准》中有关中庭烟气分层的条文及其说明有不恰当之处.     

浅析高速公路工程招投标中的最低评标价法

结合目前高速公路施工项目招投标活动的实际情况,阐述了最低评标价法的概念,归纳了其优点及存在问题,对完善最低评标价法提出几点策略,以期促进招标投标市场更加规范有序。     

Place-Making in Megaprojects in Melbourne

This article analyses state-led place-making practices in Melbourne. The two levels of government that influence planning in Melbourne make much of the city as ‘culturally vibrant’ and ‘creative’, and have incorporated creative city-inspired place-making principles into many layers of the planning system. An examination of the development of two mixed-use megaprojects in central Melbourne reveals however that ideals of culturally engaging public places, and indeed of creative landscapes for middle-class consumption, wither in the face of more basic imperatives for economic development. In these case studies the ‘creative city’, no matter how the idea is interpreted, has little traction either as a set of inclusive place-making principles or as a gentrification strategy. The article concludes that the creative city-inspired place-making objectives in the planning system at both state and local levels are ambiguous in their overall intents and completely unsupported by statutory controls. Such place-making objectives as are realised are the compromised results of the interplay of uncoordinated decisions, delivered at the pleasure of the developer.     

Pathogens in septage in Vietnam

Septage is widely acknowledged as a major source of infectious pathogens while disposal of septage, and the operation and maintenance of septic tanks, is not regulated in many developing countries. Twenty untreated septage and septage sludge samples were taken from Can Tho City, Vietnam to examine their pathogen content, and indicator micro-organisms. Escherichia coli and Enterococcus spp. were detected in all samples, regardless of sludge storage time. Phages were detected in 80% of samples. Salmonella spp. were detected in 70% of the untreated septage and 60% of septage sludge samples. Concentrations of phages and bacteria tested in septage sludge after many years of tank storage were much higher than the expected levels. Helminth ova were present in 95% of untreated septage samples with an average of 450 ova l^− 1, and were detected in all septage sludge samples with an average of 16,000 ova l^− 1. Twelve varieties of helminth ova were identified. More helminth ova varieties in higher concentrations were found in septage than those reported from stool samples. The varieties' frequency ranged from 10% to 50% and Ascaris lumbricoides predominated. Results show that pathogens and indicator micro-organisms, especially helminth ova, accumulate in sludge. Thus helminth ova should be considered when septage sludge is treated and used for agriculture. Proper health protection measures must be applied for people handling septage.     

在市场中实践在实践中学习在学习中进步--工程公司市场化进程的回顾与展望

近两年来，工程公司在提高市场竞争意识、推动市场化进程中做了大量工作，其中坚持走出去的方针是我们自我加压、推行加快市场化步伐的一个重要战略步骤。     

新时期广东城市化的新特点

新时期广东城市化出现以下特点:知识源导向、城市由单体向群体化发展、产业集群推动、政府主导自上而下的集约化发展、城镇化向城市化转变、由重“数量”发展向重“质量”发展的转变。     

新形势下高校强化基建财务管理的探讨

在市场条件下高校基建财务人员在加强日常财务管理的同时,必须树立起高度的工作责任心,抓好事前监督、事中监督、事后监督三个环节,全面理解、贯彻执行《高等学校财务制度》,管好用好各项基本建设资金,提高基建财务管理水平,更好地完成高校各项基建任务,以有限的投资,最快的建设速度,获得最大的投资效益。     

2005年北京办公物业市场七大趋势

趋势一:CBD区域写字楼集中放量从各区域规划方案上看,CBD区域多数项目在03～04年处于项目的报批手续及拆阶段,预计2005年正式推向市场,因此2005年CBD区域将成为北京市场供应集中的域,区域即将供应的项目有北京财富中心(二期)、金地国际花园、万达广场、SOHO尚都、万通中心、世纪财富中心、怡禾国际中心、光华国际等。除去未知项目,2005CBD写字楼办公面积的供应量为60万平方米左右。中关村区域经过一段时间的集中供后开始逐步放缓,2005年供应的体量相对较大的项目有中关村金融中心、新中关。金街区域可能开盘的项目只有2个:英蓝国际中…     

浅谈我国工程项目建设成本控制存在的问题

结合目前我国施工企业工程项目成本管理现状,对工程项目成本管理过程中存在的问题进行了较详细的分析,并提出了一些解决问题的办法,以做好项目成本控制工作,进而增强企业经济实力。     

Variation in property taxation in Tulsa

Conclusions It may be reasonably concluded from this study that the range of variation in these ratios of assessed to actual value are of a reasonable size for the great majority of cases. The frequency distribution of these sample ratios was not normal, however, as was assumed a process of this type would produce. On the other hand, the failure of the regression analysis to identify any significant variables which would explain these variations would tend to re-enforce the assumption that the fluctuations were indeed of a random nature.To sum it up in one paragraph, aside from a few extreme cases, the assessing process appears to give estimates which are more consistent than would be expected under the assumption that any errors would be of a random nature, but the regression analysis was unable to isolate any particular socioeconomic characteristics which would explain the variation which was present.Financial support for this research project was furnished by the University of Tulsa.