高速铁路隧道塌方处理技术探讨

以金温高铁某隧道Ⅱ级围岩地段大塌方为例,分析出现大塌方的原因及处理大塌方的技术,为以后预防及处理隧道Ⅱ级围岩地段大塌方提供一定的施工经验。     

公路隧道防塌方技术研究

分析了公路隧道塌方的原因和易发生塌方的地段,结合隧道设计和施工过程,从地质、开挖、爆破、支护、监控量测等方面,对隧道防塌方技术进行了研究,以避免隧道事故的发生,确保隧道施工安全。     

隧道塌方的预防及处理

在隧道施工中,遇到围岩破碎、地下水丰富、埋深较浅等不良地段,其施工困难,容易出现塌方现象。本文结合现场施工,总结了隧道塌方的预防及处理方法、措施。     

隧道塌方的预防及处理

在隧道施工中,遇到围岩破碎、地下水丰富、埋深较浅等不良地段,其施工困难,容易出现塌方现象。本文结合现场施工,总结了隧道塌方的预防及处理方法、措施。     

岩石公路隧道塌方风险事故树分析

塌方是岩石隧道施工中的常见灾害.总结了岩石公路隧道塌方发生的几大因素及发生机理.利用事故树理论(Fault Tree Analysis,FTA),结合上述因素分析,编制了岩石公路隧道塌方分析事故树,并结合西部某公路隧道工程,对该隧道中潜在塌方因素进行了定量分析,计算得出塌方事故的发生概率、各底事件的关键重要度,提出了相应的管理措施和控制建议.     

大瑞铁路某隧道变形及塌方病害处理施工技术

在不良地质地段进行隧道施工,容易发生隧道变形及塌方事故。文章结合大瑞铁路某隧道变形及塌方事故案例,进行了详细的隧道塌方原因分析以及方案处理,并在此基础上进行了经验总结,为类似工程提供工程借鉴。     

省道S212线峰山隧道塌方处理

文章针对隧道塌方,结合工程实例,阐述了隧道塌方的原因及处理方法,提出了在相似地质条件下,通过水文地质和工程地质的定性分析,预测可能出现不良地质现象的地段,结合新奥法收敛数据,介绍预防隧道塌方及处理通天塌方的施工经验。     

隧道工程施工中的应急措施分析

隧道工程施工过程中,由于各种原因会导致塌方、突水、岩爆、瓦斯爆炸等灾害的出现,需要采取应急措施对其进行处理,减轻灾害带来的影响。在隧道施工特点的基础上,对隧道施工中常见的灾害及产生原因进行总结,基于工程实例,对隧道施工中常用的突水突泥防塌方应急措施,特殊断层地段突水突泥防塌方应急措施、富水地段防排水应急措施等做出了预案分析,一旦出现灾害,可及时做出应对方案。     

某新建隧道掌子面拱顶塌方处治技术

某隧道出口塌方段地层岩性为炭质千枚岩,岩石较软自稳能力差,且靠近断层破碎带,在隧道施工中出现拱顶塌方现象,本文针对性地提出拱顶塌方处治措施。通过此措施和精心组织施工,保证了施工的安全和隧道永久性结构的稳定。     

余震及强降雨条件下千枚岩隧道施工塌方预防

通过试验研究了千枚岩的力学性能,结合隧道本身的特殊性,分析了在余震、强降雨等条件下千枚岩隧道施工塌方的原因,进而给出了相应的塌方预防措施,为类似条件下的千枚岩地段施工积累了经验。     

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.