深层载荷板试验构造和装置研究

通过对传统深层载荷板试验的分析,认清传统深层载荷板试验的缺点。提出了一种改进的深层载荷板试验硐结构和试验装置。应用改进的深层载荷板试验获得了桩端承载力,印证了改进的深层载荷板试验硐结构和试验装置的可靠性和优点。     

进入持力层不同深度对单桩承载力的影响

本文讨论了桩端进入持力层深度对单桩极限承载力的影响,提出了持力层的临界深度和临界厚度的参考数据。这是根据桩端进入粉砂持力层的两根桩（按进入深度变化分11个阶段进行试验）及进入硬粘土持力层的两根桩（按进入深度分12个阶段进行试验）的静载荷试验资料。用静力触探法估算了相应的单桩极限承载力及其侧摩阻力和端阻力。     

用高压注浆法提高桩端承载力

以某综合大楼为例，采用深层平板静载荷试验和N120圆锥动力触探法，对桩端卵石持力层注浆前后的承载力、沉降，击数进行了对比分析，得出了一些有益的结论。     

卵石地区自平衡深层荷载试验的应用

新疆乌鲁木齐地区卵石分布密集,地基承载力高.该地区在桩基础设计中往往忽略侧摩阻力,重视桩端阻力,传统深层荷载试验很难准确获得桩端土的力学性能.利用自平衡静载试验法能准确测试桩端阻力的优点,选用自平衡法进行试桩,测试桩端土的力学性能.根据现场试验结果,结合相关规范,确定了合理的端阻力标准值及桩端持力层承载力特征值,优化了设计方案,获得了卵石地区利用自平衡法进行深层荷载试验的工程经验,以供相似工程借鉴.     

人工挖孔桩岩基载荷试验应注意的问题

人工挖孔桩的承载力可根据终孔时桩端持力层岩性报告结合桩身质量检验报告核验.人工挖孔桩桩端岩石承载力特征值,可用岩基载荷试验确定,本文就岩基载荷试验应注意的问题进行了初步探讨.     

深层平板载荷试验确定桩端土承载力和变形模量

以杭州某基础工程为例,对应用深层平板载荷试验确定人工挖孔灌注桩桩端承载力和变形模量进行了分析。试验结果表明,深层平板载荷试验能够较准确的检验桩端土的极限承载力。     

用自平衡法深层平板载荷试验检测大直径桩的端阻力特征值

文章介绍了采用自平衡法深层平板载荷试验检测大直径桩的端阻力特征值的原理、方法及试验设备,通过对合肥及周边地区300多根基桩采用该方法得到的试验结果加以分类汇总和对比分析,给出本地区不同桩端持力层的端阻力特征值的适用范围。     

自平衡法桩端岩基载荷试验在重庆地区的应用研究

在重庆地区广泛分布的泥岩是建筑基础设计的主要持力层,且多为软质岩,根据岩体特征,采用原位载荷试验所得承载力参数进行基础设计更符合工程实际,但由于常规岩基载荷试验的局限性,阻碍了其推广应用.该文介绍了自平衡法桩端岩基载荷试验的工作原理、试验步骤及成果应用,统计了重庆市内12个项目多达98点的自平衡法桩端岩基载荷试验成果,得出知下结论:该试验方法操作简单、易行,优于常规岩基载荷试验;中风化泥岩桩端岩基承载力fuk与其天然单轴抗压强度frk比值λ主要集中于2.3～3.0之间,其相关性较好;采用该方法所得试验结果进行基桩优化设计,其经济效益显著,且安全可靠.     

高层建筑桩基持力层的选择及承载力分析

通过桩端强、中风化泥质页岩持力层的现场压板载荷试验和桩的承载力与沉降分析计算，最终确定中风化页岩层或微风化层作为桩端持力层，计算与实测所得的沉降很接近。     

同一场地不同持力层桩基静载试验对比分析

通过收集杭州某工程静载试验数据,分析了不同方案中试桩的极限承载力及桩顶桩端沉降,经比较,持力层为中风化基岩的试桩单桩竖向极限承载力与持力层圆砾层桩端后注浆的试桩单桩竖向极限承载力相差不大,桩顶沉降量亦相差不大,但桩长上圆砾持力层注浆试桩则要减少10 m～15 m,节省20%～30%,可优选圆砾持力层结合桩端注浆的设计方案。     

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。     

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.     

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.     

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。     

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。     

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)。     

浅谈建筑施工临时用电安全

针对由于建筑施工临时用电安全管理的不完善和不规范操作而导致大量工伤事故频频发生的问题,为消除用电安全隐患,对建筑施工临时用电安全管理进行了归纳和分析,并提出了整改意见,以确保现场人员及电气设备的安全运行。