关于现浇混凝土管桩技术在市政道路中的运用

由于我国地域辽阔,具有较大的南北方地区的地质条件差异,所以在市政道路施工过程中所采用的施工技术也应按照当地的地质条件状况进行合理选择。通过对公路建设施工经验问题的总结及研究中,促使现浇混凝土管桩技术逐渐产生,并且随着公路行业的发展,现浇混凝土管桩技术在市政道路施工中的应用也逐渐扩宽。本文主要论述了市政道路中现浇混凝土管桩技术的应用。     

软基加固技术在市政道路施工中的应用

文章阐述了软土地基的特点,指出了软土地基施工中的处理原则,探究了软基加固技术在市政道路中的具体应用,包括预应力管桩技术、强夯加固技术、塑料排水板施工工艺、现浇混凝土管桩、粉煤灰碎石桩。     

现浇混凝土薄壁管桩施工试验研究

文章以实际工程为例,考虑天津地区软土特性及工程特点对现浇混凝土薄壁管桩施工工法相关问题进行研究。结合现场试验,研究了混凝土坍落度、拔管速度对管桩施工质量的影响,得出了相关结论并对管桩进行了小应变动力测试,研究了小应变检测在现浇混凝土薄壁管桩中的应用。     

现浇混凝土薄壁管桩在软土地基中的应用

介绍了现浇混凝土薄壁管桩的优点和施工原理,结合工程概况,通过方案的经济技术分析,说明了现浇薄壁管桩方案的优越性和可行性,并对现浇混凝土管桩的设计和施工进行了详细阐述,施工质量检测结果表明该方案完全满足工程要求,值得推广使用。     

道路施工中的软基加固施工技术应用

对道路施工中软基的特点进行了分析,并通过现浇混凝土管桩技术、强夯法加固技术对软基进行加固处理,在工程实例中进行应用,以保障道路施工方法的完善性,促进现代道路施工行业的稳定发展。     

软土地基施工技术在路桥施工中的应用

在路桥工程施工中,软土地基施工技术包括强夯法、预应力管桩技术、水泥搅拌桩技术、现浇混凝土管桩技术、塑料排水板技术以及土工合成材料技术等,施工单位应根据实际情况选择合适的软土地基施工技术,合理编制施工计划,加强技术交底.严格控制软土地基施工各个环节的施工质量,切实保障软土地基处理效果,确保建筑整体质量安全.     

市政道路的软基施工技术探析

运用软基施工技术处理沿海地区、内地湖河沉积地区的软土地基是市政道路施工的一个重要课题.解决这个问题应主要从现浇混凝土管桩技术、真空预压技术、对强夯技术等几方面入手.     

分析市政道路施工中的软基加固技术

软基加固技术是市政道路施工过程中的重要技术,较为常见的加固技术包括粉煤灰碎石桩加固、现浇混凝土管桩施工、水泥搅拌桩加固等。通过对市政道路进行软基加固处理,能够提高路基承载能力,确保市政道路工程质量。     

PHC管桩静压法施工技术

介绍了预应力高强度混凝土管桩(PHC管桩)静压法施工的技术特点、工作原理、施工作业条件、施工技术、安全措施和工程应用情况。     

建筑地基处理中混凝土管桩的设计问题

文章阐述了预应力混凝土管桩限制使用情况,说明了预应力混凝土管桩结构设计,并对具体工程实践进行了分析,包括工程概况、管桩施工组织管理、合理运用预应力混凝土管桩施工技术、加强管桩施工质量检查、注重管桩质量问题的防治。     

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。     

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…     

Developments in immersed tunnelling in Holland

Holland has 22 immersed tunnels (14 road, 5 rail and 3 utilities tunnels). Another three are under construction, and more are foreseen. The tunnels are of the concrete type, i.e., constructed without a steel shell. The paper describes developments in technology and in design philosophy since the first immersed tunnel was completed 52 years ago. These developments include, amongst others: the introduction of the Gina rubber gasket between elements; the division of elements into sections divided by flexible joints; the application (if possible) of longer elements (up to 268 m); the use of precast sections for tunnels that have a small cross-section; the omission of the watertight lining (made possible by cooling the concrete of the walls during the first days after pouring); various foundation methods (e.g., sand flow instead of sand jet system; piled foundations when necessary); the use of the excavation for the open ramps (or the part of the tunnel built on land) as a casting basin for the elements; the changed approach to casting basins now that well pumping is usually forbidden; and the transport of the elements across shallow locations and across the sea. It is emphasized that the current state of immersed tunnel technology is the result of a continuous international exchange of ideas and experiences.     

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。