城市综合管廊工程重要节点设计探讨

随着我国城市基础设施建设的不断完善,城市综合管廊的设计与施工逐渐受到了人们的关注,近年来,城市综合管廊越来越多地应用于市政建设中,然而我国城市综合管廊的建设和设计研究著作较少,基于此文章对城市综合管廊进行了简单概述,分析了城市综合管廊的特点,对城市综合管廊工程的重要节点设计进行了探讨。     

城市综合管廊工程重要节点设计探讨

城市综合管廊工作在城市建设中,逐渐得到了人们的重视,管廊综合型应用能力较强,因常运用于城市基础设施建设。在简述城市综合管廊工程基础上,探索分析了城市综合管廊工作重点节点设计,并结合肇庆新区城市地下综合管廊及同步道路工程项目展开探讨,可供类似工程参考与借鉴。     

PPP模式在城市地下综合管廊工程中的应用

城市地下综合管廊的建设为我国市政基础设施建设工程的重要组成部分,当前PPP模式已经广泛应用到基础设施的建设并且取得了良好的效果,而城市地下综合管廊工程在应用PPP模式的过程中出现了诸多问题,本文针对PPP模式应用于城市地下综合管廊工程的问题进行分析,提出相应的对策建议。     

城市综合管廊工程重要节点设计研究

综合管廊是21世纪新型城市市政基础设施建设现代化的重要标志之一,它避免了由于埋设或维修管线而导致城市道路重复开挖,避免了土壤对管线的腐蚀,延长了管线的使用寿命。同时,由于综合管廊的集中敷设管线方式,为城市的发展节省了宝贵的地下空间,为城市管线实现信息化建设管理创造了良好的条件。文章对城市综合管廊工程重要节点设计做出了分析和阐述,并且对于城市综合管廊工程的设计给出了几点建议,希望能够对大家有所启发。     

城市综合管廊工程标准舱及节点设计探讨

城市综合管廊是我国当前城市基础设施建设的重点推进项目。笔者依据现有规范并参考国内外城市综合管廊建设经验,比较系统地提出了城市综合管廊的标准舱、节点的设计方法和方案,可供相关技术人员参考。     

容纳全部市政管线的城市综合管廊标准舱断面及节点设计探讨

城市综合管廊是我国当前城市基础设施建设的重点推进项目。笔者依据现有规范提出了城市综合管廊满足全部管线入廊的标准舱断面及节点的设计方法和方案,可为城市综合管廊的建设及相关技术人员的工作提供有利参考。     

管廊工程上出线节点与下出线节点优劣分析

城市地下综合管廊的出线节点是综合管廊的重要组成部分,也是管廊设计中的难点和管廊施工的重点。不同出线节点的管廊结构埋深不一,结构受力不同,施工顺序不同等。以六盘水综合管廊工程(下出线)和贵阳白云管廊工程(上出线)为例,从工艺、结构、施工、成本4方面对上出线节点和下出线节点进行简要对比。     

圆形截面综合管廊及节点设计

城市综合管廊是我国当前城市基础设施建设的重点推进项目,笔者依据现有规范,对城市综合管廊圆形标准舱断面及节点的设计做法进行探讨,可供相关技术人员参考。     

基于盖挖法的综合管廊主体结构关键节点设计施工

随着现代化城市建设的快速发展,城市地下管线数量越来越多,规划设计也越来越复杂,综合管廊已作为一种非常重要的市政基础设施存在于城市建设之中,对于整个城市的道路、交通及市民出行等各方面都有着重要影响。根据2015年8月国务院办公厅关于推进城市地下综合管廊建设的指导意见(国办发(2015)61号)综合管廊建设重要性及必要性也已提升至空前高度。论文阐述了一种基于盖挖法的综合管廊主体结构关键节点设计施工方法。     

深圳 因地制宜开展综合管廊建设 奋力推进城市高质量发展

<正>习近平总书记指出,要加强城市基础设施建设,打造宜居、韧性、智慧城市;要统筹各类基础设施布局,提高基础设施全生命周期综合效益。综合管廊建设是解决“拉链路”“蜘蛛网”等问题的重要举措,是推进城市治理能力现代化的基础性工程。作为一座高密度、超大型城市,深圳市深入学习贯彻习近平总书记重要指示精神,在住房城乡建设部的指导支持下,坚持把综合管廊建设作为城市重要“里子”工程、“良心”工程,坚持前瞻性布局、系统化推进、专业化运营,因地制宜、有序有力加快项目建设,着力破解管廊建设难、管线入廊难、实际运营难问题。目前,全市累计在建综合管廊257公里、建成管廊185公里、运营管廊31公里、入廊管线820公里,形成了干支结合的城市地下“大动脉”,为保障城市安全、提升城市品质、提高城市综合承载力提供了有力支撑。     

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。