TSP技术在隧道超前地质预报中的应用

介绍TSP超前地质预报的原理和在隧道开挖过程中的应用,并以采集到的超前地质预报数据为基础,结合实际开挖情况,对TSP在隧道超前地质预报中的准确性进行了总结和分析。以TSP预报结果为基础,结合实际开挖的地质情况分析TSP技术对围岩分级、不良地质体的探测能力。研究发现,TSP超前地质预报是一项实用性很强的工作,在隧道开挖过程中,可对掌子面前方危险提前预警,降低施工过程中发生事故的概率,保证施工人员的人身安全。     

隧道地震勘探(TSP)在某隧道含水构造预报中的应用

阐述了隧道地震勘探的基本工程原理和TSP203超前地质预报设备在某隧道突水超前预报中的应用,并通过对某隧道进口段桩号ZK64+918处的超前地质预报结果与实际工程掌子面开挖揭露情况的对比,证明TSP对该处的超前突水预报是准确的,值得在复杂地质条件下隧道工程实践中推广。     

长山隧道不良地质段的TSP超前预报研究

武汉花山大道长山隧道不良地质段主要表现为岩溶和破碎地质带,给施工带来了相当的难度。为赢得时间,利用TSP超前地质预报技术,对不良地质段做了超前预报,探测表明在K3+180～K3+144段发育有溶洞并伴有少量裂隙水,K3+144～K3+114段为破碎地质带。实际地质情况与预报结果吻合较好,为隧道施工方案和施工措施的选择提供了重要的参考依据。     

TSP203plus在隧道超前预报中的应用

TSP203 plus系统是目前国内外在隧道等开挖工程的超前地质预报领域内较为先进的探测设备.本文介绍了该系统在牛车顶隧道施工中的应用,得到探测范围内主要存在节理裂隙发育、局部破碎含水等工程地质问题,为施工方进行安全施工和采取相应超前支护措施提供了良好的技术指导.同时也进一步证实了TSP203plus系统在隧道超前地质预报中具有良好的预报效果,能够比较准确地反映出隧道及地下开挖工程掌子面前方岩体中的不良地质情况及其方位等.     

TSP203系统在永九快速线永龙隧道超前地质预报中的应用

本文通过永龙隧道A标段YK1+480～YK1+600段超前地质预报的应用实例,介绍了TSP203系统在永龙隧道超前地质预报工作中的应用,具体阐述了TSP203系统的基本原理及特点、数据采集、数据处理与分析、探测结论和围岩实际开挖情况对比分析。为确保隧道安全持续挖进,确定隧道施工工艺,合理变更设计和施工计划提供了依据。     

TSP203地质超前预报在北岭山隧道断层中的应用

通过北岭山隧道的超前地质预报,介绍了TSP203的基本原理,分析了TSP203在探测北岭山隧道断层破碎带中的应用情况,结果表明,TSP203隧道地质超前预报技术在隧道建设中发挥了巨大的作用,对隧道安全施工具有重要意义。     

TSP203在重庆铁峰山隧道涌水段超前地质预报中的应用

介绍了TSP203隧道超前地质预报系统的基本原理、技术状况和在隧道隧洞尤其是隧道涌水段超前预报中的应用效果和达到的技术指标,并应用TSP203对重庆铁峰山公路隧道涌水坍塌段进行了的综合分析,其预报结果经验证与实际围岩开挖情况基本吻合,对类似工程有一定的指导意义。     

超前地质预报在斜井挑顶开挖段的应用

斜井与正洞交叉口处三维应力集中,单一的地质预报技术因其局限性难以精确指导施工,不能规避复杂应力环境隧道施工中的风险。以西固隧道1号斜井挑顶施工开挖段为例,先后采用掌子面地质素描、TSP、地质雷达等多种超前地质预报技术,预测了交叉处围岩邻近断层破碎带,且存在基岩裂隙水情况,表明开挖施工可能出现掉渣坍塌,突涌水现象,对隧洞安全开挖容易产生不良影响。研究结果发现,现场开挖结果与综合预报分析结论吻合,综合超前地质预报技术在复杂地质、复杂应力环境下不仅可以弥补单一地质预报技术的不足,还能准确指导现场施工,保障隧道施工安全。     

超前地质预报技术及其在隧道中的应用

本文简要介绍了几种常用的超前地质预报方法,分析了各种地质预报的预报距离及其优缺点,结合地质雷达在实际隧道施工中超前地质预测结果与实际开挖断面岩层的对比,说明在隧道开挖过程中采用科学的、先进的隧道超前地质预报技术预测、预报隧道开挖工作面前方的地质构造,能够较为准确地查出隧道掘进方向的围岩性状、结构面发育情况,特别是溶洞、断层、破碎带和含水情况,可以减少隧道施工的盲目性,进而有效地防止工程事故,加快施工进度以及保证工程质量。     

TSP超前地质预报在膨胀岩隧道施工中的应用

隧道施工特别是复杂地质条件下的施工面临着很多地质灾害问题,如突水突泥、断层破碎带的塌方等,准确地进行隧道超前预报,能有效降低施工风险,确保施工安全和进度,减少工程事故的发生.针对云桂铁路建设中那达1号膨胀岩隧道工程,利用TSP超前地质预报技术,并结合隧道工程地质情况,通过准确预报工作,阐述了TSP超前地质预报的基本原理和方法,探讨了该技术在那达1号隧道施工过程中的应用效果,并将预报结果与实际工程进行对比,验证了该技术的可靠性.     

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.