利用MJS工法穿过大断面共同沟加固地基施工技术

在上海世博会地块B片区的地下联络通道基础施工中遇到了共同沟。为了达到止水加固地基、保护共同沟的目的,应用了MJS工法穿过共同沟施工。该工法的采用降低了管线搬迁成本,加固了土体,保证了施工安全,使工程得以顺利进行。     

MJS高压旋喷桩在基坑围护结构断口处的应用

针对基坑施工中无法临时迁改的城市大型主供电管线,导致基坑原设计的围护结构SMW工法桩及冠梁无法封闭,出现断口的问题,文章以实际工程为例,详细介绍了施工过程中采取MJS高压旋喷桩将围护结构断口封闭的施工方法以及施工过程中采取的安全处理技术措施等.工程实践表明,表明MJS高压旋喷桩应用于SMW工法桩断口处进行基坑开挖,安全...     

MJS工法在外包井组合式围护施工中的应用

详细论述了虹梅南路隧道施工期间对原有DN2000污水总管的改造方案,重点分析了改造过程中的难点及解决方案。介绍了施工外包井基坑时采用的MJS工法、SMW工法及旋喷加固构成的组合式围护结构和施工过程。目前该污水总管已顺利完成施工,该方案可供后续同类型大口径管道改造施工中保护管道之参考。     

MJS工法在地层加固施工中的应用分析

MJS工法起源于日本,是一种新型的全方位高压喷射地基处理技术。它采用独特的多孔管排泥及地内压力监测技术,使其具备大直径旋喷加固施工、大深度地基改良及环境影响小等优点。但是MJS工法自从2008年引进中国以来目前仍处于施工参数及工艺的摸索阶段。本文以郑州市某隧道暗挖段工程为依托,分析了MJS工法相较于传统高压旋喷桩在地层加固中的优点以及施工过程中遇到的一些难题。     

MJS及RJP高压旋喷注浆法加固地层技术试验

本工程通过采用MJS及RJP工法对紧邻地铁周边环境基坑围护结构进行微扰动加固,同时对基坑降承压水采用一种RJP工法封底加固替代抽降承压水的新工艺。解决承压水抗突涌稳定问题,可以减少止水帷幕的插入深度,并减少对周边既有设施的扰动。该方法在邻近地铁设施的深基坑工程中取得了良好的实践效果。     

地下通道下穿既有构筑物的明挖法施工技术

城市地下连接通道下穿既有构筑物通常采用以顶管为主的非开挖技术,在上海世博会B片区地下空间开发——下穿博成路3条地下连通道工程中,首次尝试采用明挖法施工工艺,工程下穿上海市目前最大断面共同沟。施工阶段克服了围护结构不封闭、大断面共同沟悬吊保护、共同沟结构开孔等施工难题,在通道施工阶段保障了运营共同沟的安全。     

采用水平MJS工法的盾构端头加固技术

介绍了水平MJS工法在盾构端头加固中的应用，MJS工法具有成桩质量好、可全方位加固等特点，将其应用到盾构端头地层加固，不仅加固效果良好，而且无需地面加固场地，该技术在盾构端头加固中的应用具有一定的推广价值。     

RJP工法与MJS工法的比较分析

介绍了全方位高压喷射工法(MJS工法)与双高压旋喷工法(RJP工法)的施工原理及特点,并结合工程实例,分析了两种旋喷加固工法的优缺点,指出RJP工法与MJS工法相比,具有工艺简单、施工效率高、造价低廉等优点,值得推广应用。     

MJS工法桩施工质量及造价控制措施——以科举博物馆及周边配套项目为例

MJS工法桩以其可以全方位进行高压旋喷施工,桩径大,桩身质量好,对周边环境影响小等优势,在深基坑土体加固工程中广泛应用.文章从MJS桩施工质量及造价控制出发,对MJS桩施工质量及造价控制要点进行分析,为类似工程提供借鉴和参考.     

BIM技术在上海穿越共同沟地下通道建设中的应用分析

本文以穿越上海世博园区博成路共同沟的地下通道施工为背景,应用BIM技术辅助决策、设计、施工,在确保世博园区绿色施工以及确保共同沟内管线正常运营条件下,成功对共同沟围护结构进行了封闭,保证了基坑开挖的安全、共同沟的稳定和地下通道的建成。在穿博成路共同沟三条地下通道项目中应用BIM技术表明:通过全过程BIM虚拟建造,优化了方案、节省了造价、缩短了工期。     

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.