杭州地铁1号线九-下盾构区间施工技术

结合杭州地铁1号线土压平衡盾构施工实践,对盾构下穿河流、建（构）筑物及已成型盾构隧道的技术措施进行了总结,得出一些土压平衡盾构施工实践经验,希望对类似工程有所帮助。     

多换乘车站盾构长距离穿越建构筑物施工关键技术研究——以杭州地铁7号线5工区为例

盾构施工对换乘车站处的影响较大,而目前对多换乘车站盾构长距离穿越建构筑物施工关键技术的研究尚少。本文以杭州地铁7号线5工区为研究背景,对盾构掘进、盾构穿越建构筑物、明挖法深基坑施工进行分析。     

浅谈盾构出洞施工技术

盾构出洞施工在地铁隧道施工中占有相当重要的地位,确保盾构以正确的姿态顺利出洞和防止出现坍塌等事故是施工的重点。以杭州地铁间盾构出洞施工为例,对盾构出洞施工进行叙述,对类似工程施工具有一定的指导意义。     

大小盾构与顶管工程在同一区域内施工风险控制

结合杭州地铁6号线盾构掘进实际情况,分析杭州地区地铁盾构及江南大道改造提升工程下穿过街通道顶管工程的影响和可能产生的风险,合理制定盾构下穿顶管工程的检测项目和参考标准,提出有效应对措施。在杭州地铁6号线施工中既保证了顶管施工质量,同时也保证了盾构的推进。     

复杂岩溶地层地铁盾构施工影响的关键技术研究

针对复杂岩溶地层中盾构施工对周边环境影响及相应施工关键技术难题,以杭州地铁6号线一期工程河山路站～凤凰公园站区间为例,对灰岩上覆粉细砂地层岩溶段岩溶处理技术及盾构掘进施工技术进行研究,阐述了该标段的工程地质特点和存在问题,分析了原因并给出应对措施。     

钱塘江流域大型隧道工程精益施工技术研究

本文以杭州钱塘江流域某大型越江隧道工程为例,结合盾构隧道精益施工理论,对大直径盾构隧道精益施工进行了分析研究,总结了优化施工和管理的方法,为大型盾构隧道工程寻求改善方法。     

盾构掘进引起的地层沉降槽宽度系数研究

盾构技术在我国地铁建设中得到广泛的应用,盾构施工中由于开挖面支护压力控制不当引起的地面沉降一直是工程关注的重点。在分析盾构施工对地层扰动的基础上,通过Flac3D建立了盾构开挖面稳定分析模型。计算分析了开挖面支护压力与地层损失率的关系,并研究了不同埋深下地面沉降槽曲线形式,得到杭州地区地层沉降槽宽度系数的修正公式。最后将以上研究成果应用于杭州地铁盾构穿越沪杭铁路工程,提出了在开挖面支护压力控制上应尽量减少波动,地层损失率不应超过0.75%,为该工程顺利掘进提供了重要参考。     

复杂地质条件下盾构隧道“绿色施工”技术研究—以杭州地铁 8 号线一期工程为例

杭州地区潜水水位高,砂层、软粘土层交错分布,富含浅层天然气,工程地质条件复杂。本文以杭州轨道交通8号线1期工程为例,分析沿线的地质概况及可能存在的地质问题,探究影响地铁施工的主要不利因素,提出实现复杂地质条件下盾构隧道“绿色施工”的技术措施,研究成果可为复杂地质条件下地铁盾构“绿色施工”技术标准的制定提供借鉴。     

浅谈复杂环境下粉土粉砂地层盾构进洞施工技术

杭州粉土～粉砂地层具有高渗透性,稳定性差特点,盾构进出洞时洞门封堵效果难以保证,极易导致涌水、涌砂现象发生;杭州地铁1号线秋涛路站～城站站区间左线盾构进洞时同时还面临穿越城站站地下出租车道、高架桥,近距离侧穿城站站3A出入口、中间连接通道等复杂环境。故以杭州地铁秋城区间左线盾构进洞施工为例,对进洞施工提出具体的措施和方案,对类似工程施工具有一定借鉴作用。     

粉砂地层土压平衡盾构下穿既有线路的施工实践

杭州地铁粉砂地层具有易液化、高渗透性、稳定性差等特点,盾构穿越既有线时对既有线的保护难度极大;杭州地铁1号线九堡东站—下沙西站区间粉砂地层面临下穿既有线作业,隧道距离既有线最小距离4.95 m。在此以杭州地铁工程粉砂地层土压平衡盾构下穿既有线路为背景,介绍穿越时的既有隧道的保护措施及穿越时的施工技术,对类似工程具有一定的借鉴作用。     

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.     

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。     

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。     

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.     

2008年日本火灾情况

<正>1火灾总数在2008年(1～12月),日本发生的火灾总数为52 394起,与2007年相比减少了2 188起(4.0%)。这相当于平均1天大约发生143起火灾,每10min发生一起火灾。火灾类别(见表1)。     

谈城市历史保护规划的误区

由于缺乏起码的历史文化知识,忽视历史文化遗产的保护,错误的决策导致了建设性的破坏,要加强城市保护的教育,培养合格人才。     

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。