大跨度混凝土梁板高架支模施工技术

本文结合实际工程实例,对中软国际项目F1、F2大跨度超高结构混凝土模板支撑体系的设计、施工方案、架体构造、支架拆除等进行了探讨。     

利用BIM技术进行施工可视化交底

正1工程概况成都大源商务核心区F6地块项目位于成都市高新区,项目结构形式主要为框架结构、局部为钢结构。由1栋26层住宅楼、1栋20层写字楼、6层裙房商业及3层地下室组成,建筑面积约17万m~2。2可视化交底的实施过程2. 1施工方案编制可视化交底的第1步是编制严谨合理、具有实际指导意义的施工方案。着重对关键工序进行描述,以简短的关键字进行叙述。     

BIM技术在青岛新机场航站楼施工中的应用研究

青岛新机场是国内在建的4F级机场之一,空间结构复杂多样,专业分包众多,BIM技术正是解决此类大型项目施工问题的关键技术。本文对青岛新机场结构布局进行分析,提出解决相关问题的BIM方案,通过应用BIM技术,项目实现技术升级,加强项目总承包管理,节约工期,社会效益显著提升。     

某商住楼结构方案分析比较

本文通过对一栋18层高层住宅建筑采用三种不同的结构布置方案(框架结构方案、剪力墙结构方案、框架-剪力墙结构方案),进行抗震性能和经济性能的分析比较,对三种结构方案的功能适用性及结构特点进行评析,得出在进行高层住宅结构方案选择时,采用剪力墙结构体系,可以获取良好的经济效益,使项目达到目标最优值;为同类高层住宅建筑的设计选型提供一定的参考。     

武汉某250m超高层建筑混凝土结构和混合结构设计方案及造价对比

对于武汉某250m超高层建筑,在结构设计方案阶段,设计了混凝土结构和混合结构2种结构方案,对2种方案的优势和劣势进行了分析,并对结构材料造价进行了对比.结果表明,2种结构方案均可行,采用混凝土结构方案可大幅降低结构造价,采用混合结构,施工速度快,可缩短项目施工周期,但结构材料造价相对较高.论文分析结果对建设单位、设计单...     

超高层项目结构方案经济性对比

针对深圳市某超高层项目的特点,设定了三个不同结构方案进行了经济性对比,并对结果进行分析,得出对此项目造价最低的结构方案,为今后相似结构的设计提供了参考。     

PPP项目控制权配置研究——基于财金[2014]156号文与发改投资[2014]2724号文

通过分析现有的控制权配置方法,选择基于权利束分解的控制权配置方案。首先,基于Fama Eugene F的决策理论识别出PPP项目交易过程中的决策节点,并对控制权进行分解;其次,基于156号文、2724号文及相关文献得出政府部门与项目公司之间的控制权配置方案;最后,通过项目公司股权配置的情况得出政府部门与私人部门之间最终的控制权配置结果。     

房屋建筑施工中运用结构加固技术的探讨

在建筑工程项目施工过程中,选择适宜的结构加固技术可显著改善建筑物的稳定性。在施工期间,严格按照规定要求施工是开展建筑项目加固作业的前提,结构加固技术的持续发展,技术类型逐渐增加,为改善建筑结构质量,需制定科学合理的施工方案,改善房屋建筑结构的安全性。对此,首先对房屋建筑结构加固技术的使用效果进行介绍,之后对建筑物加固施工技术类型进行分析,并选择某建筑作为研究对象,对结构加固技术施工方案进行详细探究。     

敦煌基地小转盘过街人行天桥工程方案设计研究

从跨度、桥宽、梯道宽度及长度、结构外形、施工难度、投资估算等方面出发,对过街人行天桥工程项目方案设计中提出的三套设计方案进行对比分析,确定方案一、二为推荐方案,通过建立主梁结构仿真模型,从承载能力、变形能力及结构刚度三个方面进行对比,最终得到方案一的承载能力、变形能力及结构刚度均优于方案二,继而确定方案一为项目的推荐方案。     

贵阳未来方舟F3组团T2塔楼结构选型与设计

贵阳未来方舟F3组团T2塔楼地上56层,结构总高度204.8m。核心筒高宽比达到22.0,导致结构宽度方向刚度不足。针对上述情况,提出了三种结构方案,并从建筑要求、经济性和施工难度方面进行比选。对选定方案进行小震弹性分析、整体稳定性分析、搭接牛腿节点分析、大震动力弹塑性分析,并采用性能化设计方法对结构进行抗震设计。结果表明:选定方案的刚度满足整体稳定需求,抗震性能可达到预定的性能目标。     

污泥制砖存在问题浅析

污泥制砖符合国家的环保政策,但在技术方面还待进一步创新和突破。为此分析了污泥制砖在技术方面、环保方面和社会大众认可方面存在问题及相应的改进措施。     

干旱区绿洲环境下的新疆小城镇建设投资

一、研究区域基本现状新疆地处欧亚大陆腹地,地貌轮廓表现为“三山夹两盆”,山地与平原的面积大致各占50%,镶嵌于戈壁沙漠的绿洲仅有7万平方公里。新疆土地面积166.49万平方公里,占全国总面积的六分之一。气候干旱,荒漠广布,是中国最大的干旱区,是亚洲干旱核心区,也是世界上著名的干旱区之一。水资源短缺,生态极度脆弱。新疆2004年底有1950万人,人均GDP已经超过了1000美元,城镇化进入了快速发展阶段,特别是小城镇的发展速度较快。但新疆特殊的干旱区绿洲环境,使得小城镇的发展存在许多问题。一是城镇规模小而散,基础设施配套差,城镇集散和…     

Levels of manganese in the urine of female farmers in non-polluted regions in Japan

Nearly 1500 urine samples were collected from female farmers in eight regions widely scattered in the islands of Japan in the winter of 1987-1988. The samples were analysed for manganese by wet ashing and flameless atomic absorption spectrophotometry under strict quality control. The values observed after adjustment for a specific gravity of 1.016 were distributed log-normally with a geometric mean of 0.65 microgram/l and a geometric standard deviation of 2.47. There was no effect of aging or any effect of smoking on the urinary manganese concentration. The inter-regional difference may be present but not yet conclusive. As no sex difference was observed in a previous study, it may be possible to deduce that the value may possibly stand for the "background" level of both men and women, either smoking or non-smoking, among the general Japanese population. The observed value is discussed in comparison with values reported in the literature.     

Typification of Fires in Buildings in Spain

Although the Dirección de General de Protección Civil (DGPC), an agency of the Spanish government, has been responsible for the collection of data and the statistical analysis of fires since 1985, it has not as yet issued any reports. It is true that a couple of studies have been made, but in neither case did they use a standardized methodology but relied simply on the heterogeneous information provided by the fire brigades which cooperated in the studies. At that time Spanish fire brigades did not have special units for professional fire investigation, nor was the information derived from standardized methodologies suited to research purposes. In addition, information was extremely scarce and basic, focussed only on the fire, the use of the building and personal data of the victims. In this context, the project for a Fire Investigation Unit in the Fire Brigade of Málaga (the sixth largest Spanish province in inhabitants) was set up. Although inspired in the methodologies used in the USA and in the UK, the aim was to create a customized methodology for the first scientific investigation of fires in Spain. Our research was conducted in 2007. Using the methodologies of the USA and the UK, our own methodological approach and the Spanish regulations, we drew up a questionnaire with 110 variables arranged into 6 modules. We studied 96 fires out of the 154 emergency fire calls received in 2007, having omitted some emergency calls for various reasons. Our results revealed that it was necessary to generalize the installation of fire extinguishers in residential buildings, to train the general public in the use of these devices, to promote the use of fire and smoke detectors in residential buildings, to encourage the inspection and control of old electric installations and to monitor the new installations, to generalize the implementation of emergency and evacuation plans and to design new systems and materials for the cabinets where hand-held extinguishers are stored.     

分光光度法测水中余氯

介绍了用双硫腙分光光度法测定水中余氯的新方法，阐述了其测定试验过程，根据试验结果显示，其结论符合国家标准，表明该方法可用于自来水等样品中余氯含量的测定，结果比较准确。     

Intersections of inequality in homeownership in Sweden

Abstract

Inequalities relating to ownership of housing have become a major issue de jour in many Western societies. This article examines how the distribution of homeownership in Sweden relates to two factors widely seen as significant to such inequalities, namely parental tenure status and place of birth. We use longitudinal registry data to examine the bearing of these two factors on individual-level tenure progression since the beginning of the 1990s for persons at different stages of their housing careers. We extend existing understandings of Swedish homeownership patterns by demonstrating that inequalities relating to place of birth and parental tenure intersect with one another in ways that substantially advantage certain subgroups while disadvantaging others, and by demonstrating that experiences of entry into homeownership have in recent years been changing in markedly different ways for these different subgroups. Overall, Swedish homeownership inequalities, far from dissipating, appear to be hardening along existing lines.     

莳花在城市绿化中的应用

目的:花化、香化、彩化已成为城市园林绿化的主要趋势,也是为满足人们对环境要求越来越高的一种心境。方法:选择采用莳花能表现出品种繁多,色彩艳丽等不同的方式,从而能在很大程度上丰富了植物造景的层次感要求。结果:能使其达到美化环境、增添节日气氛、提高绿化品质等方面有着突出的作用。结论:莳花造景对城市的美化可达到立杆见影效果,从而提高城市的形象和品位。     

日本城市浅层地下空间利用的新成就

本文结合日本川崎市站前广场和神户市哈巴兰德地区的立体化再开发，分析介绍当前日本浅层地下空间开发利用的成就和特点。     

遗传算法在边坡稳定系数计算中的应用

边坡稳定性的关键问题是确定最危险滑动面(潜在最危险滑动面)和边坡的稳定系数。国内外一般是采用先假定边坡滑移模式,然后近似确定最危险滑动面,再求近似的边坡稳定系数的方法来分析边坡的稳定性,但假设的边坡滑移模式难以反映边坡滑移的实际状态。因此本文探索利用遗传算法搜索最危险滑动面,并得到最小稳定系数及对应的最危险滑动面曲线,取得了较好的效果。     

地质情况复杂地区高速公路隧道地质预报研究

针对地质情况复杂地区垫邻高速公路设计、施工中的具体问题，从地质预报的方法、原理方面入手，对地质情况复杂地区高速公路隧道施工中的地质超前预报工作进行了深入的研究，在分析归纳的基础上，提出合适的工作方法。