低应变反射波法检测嵌岩桩适用性探讨

根据低应变反射波法测桩工作原理，结合某高速公路建设中失败的检测实例，对高速公路桥梁的桩基低应变反射波法适用性进行了探讨，并对波形判读中的有关问题进行分析，为高速公路桥梁嵌岩桩质量检测提供参考。     

RSM-PRT在桥梁灌注桩检测中的应用

1引言低应变无损测桩方法具有测试成本低、检测速度快、适用性强等优点,在我国公路桥梁的桩基检测中得到较为普遍的应用。桩基低应变无损检测的方法较多,主要有反射波法、机械阻抗法、动力参数法、声波透射法等[1,2]。本文将根据低应变反射波法测桩工作原理,结合某高速公路建设     

低应变法和高应变法在桩基检测中的结合运用及实例分析

低应变反射波法和高应变法是常用的桩基检测方法,低应变反射波法可对桩基完整性进行检测,和高应变法可同时对基桩的单桩竖向抗压承载力和桩身完整性进行检测,现已广泛地应用于工程实践中。本文对低应变反射波法和高应变法的基本原理进行了阐述,对两个典型的工程实例进行了分析,探讨低应变反射波法和高应变法在桩基检测中的结合运用的优点。     

水泥稳定砂砾桩低应变反射波检测技术

低应变反射波法检测技术是对基桩光整性进行无损检测的重要技术之一,本文以前锋农场至嫩江高速公路昆仑气道口至伊春绥棱段为依托工程,以冻土试验段中采用水泥稳定砂砾桩处理软基的桩体为研究对象,论证了低应变反射波法在检测水泥稳定砂砾桩完整性上的可行性,为水泥稳定砂砾桩完整性的检验提供了有利方法。     

低应变动测方法在水泥土搅拌桩测试中的应用探讨

对水泥土搅拌桩强度的影响因素和低应变反射波法与水泥土强度特性的关系进行了分析 ,就低应变反射波法在水泥土搅拌桩检测中的适用性进行了探讨 ,通过实例分析 ,提出利用低应变反射波法检测水泥土搅拌桩具体适用条件 ,为今后水泥土搅拌桩检测提供了有价值的借鉴     

低应变反射波法在闽南地区软土地层基桩检测中的应用研究

文中对国内低应变反射波法测桩技术研究现状进行了分析,从基本理论、存在的问题以及实例说明三个方面分析了低应变反射波法测桩技术研究的必要性.结果表明,国内现阶段对于低应变反射波法测桩技术进行了大量应用,但低应变法的机理尚未完全明确,在检测过程中仍有局限性;结合现场实际应用情况,低应变反射波法在闽南地区软土地层基桩检测是有效...     

用低应变反射波法检测搅拌桩桩身完整性探讨

结合反射波法的基本原理,阐述了低应变反射波法检测搅拌桩的方法,并对水泥土搅拌桩桩身完整性检测方面进行分析,最后得出低应变反射波法检测水泥土搅拌桩还处于探索阶段,还需继续进行探讨的结论。     

谈低应变反射波法在基桩检测中的应用

简单介绍了低应变反射波法的原理及桩身完整性判别标准,在此基础上探讨了低应变反射波法在桩基检测中应注意的一些问题,如桩头处理,传感器的安装等,阐述了反射波法检测桩身质量时的几种影响因素,为今后采用低应变反射波法对桩基进行检测提供了借鉴。     

低应变反射波法检测树根桩桩身完整性

叙述了树根桩的特点,说明用低应变反射波对其进行质量检测的必要性。介绍了低应变反射法检测的特点,从现场采集和室内分析等方面阐述了如何有效地用低应变反射波法检测树根桩的桩身完整性。     

钻孔灌注桩低应变检测方法研究

钻孔桩灌注桩由于其高承载能力,成熟的建筑技术而广泛应用于桥梁、铁路、高速公路和市政隧道等领域。然而,钻孔灌注桩是一个重要的隐蔽工程,成孔、焊接、泥浆、沉渣以及混凝土的浇筑等因素都会影响到工程质量,施工难度大。低应变反射波法可以快速检测基桩的完整性,但结果需要有一定实践经验和理论依据。本文介绍了低应变反射波法的原理和基础,以及桩基检测的必要性。结合具体的工程实例,对低应变反射波法在工程实践中的应用具有一定的解释和指导意义。     

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.