某建筑楼板裂缝鉴定及处理措施

通过检测某住宅楼楼板混凝土强度、钢筋配置及裂缝情况,验算分析了该住宅楼的承载力与裂缝的形成原因,并提出了裂缝的处理方案和施工工艺流程,从而确保住宅楼的安全性。     

现浇混凝土屋面板板底裂缝成因分析

利用现场检测的数据的来分析裂缝形成的原因,对找出混凝土板面产生裂缝原因的影响因素有一定的帮助。文章对工程现场实际回弹法混凝土抗压强度、楼板钢筋配置、楼板厚度及混凝土游离氧化钙检测结果进行分析,结果对今后的现场检测裂缝成因分析工作具有一定的指导意义。     

浅谈楼面裂缝的防治措施

现浇混凝土裂缝的产生原因是多方面的,设计未采取相应的构造措施,楼板开洞及预埋管线使截面削弱;材料使用不当,质量不满足规定要求;施工混凝土强度未达到设计强度,钢筋配置不符合要求。     

某框剪结构高层住宅楼板裂缝成因分析

本文通过对某框剪结构高层住宅楼板进行裂缝检测,并对楼板裂缝、楼板钢筋配置、楼板钢筋保护层厚度三项检测结果进行分析,从温度应力和施工过程两个方向进行思考,揭示了裂缝产生的原因,并阐述如何使用压力注射法修补裂缝。     

现浇楼板裂缝的原因分析及施工建议

混凝土现浇楼板是一种量大面广的受力构件 ,稍有不慎 ,极易产生裂缝。由于裂缝的产生 ,对建筑的耐久性 ,观瞻性及使用功能等均造成影响。为了彻底消除现浇楼板裂缝 ,各级建设行政主管部门采取了切实有效的措施 ,但现浇板产生裂缝的现象仍时有发生。笔者认为 ,导致现浇楼板产生裂缝的因素较多 ,除了设计方面的原因外 ,与施工组织不当有直接关系。本文主要是探讨因施工方面的原因引起现浇楼板裂缝以及防治措施。1　现浇楼板产生裂缝的原因( 1 )空气干燥 ,混凝土养护不及时 ,混凝土干缩快而导致裂缝。( 2 )日温差大 ,混凝土浇筑初期隔热保温措施不力 ,日膨胀晚收缩量大而导致裂缝。( 3)冬期温差大 ,特别是北方及内陆地区 ,混凝土结构缺少保温保湿措施 ,混凝土楼板收缩变形较大而将平台拉裂。尤其是未采取保温防护措施的框架、框剪结构平台和其他裸露的楼板。( 4 )单向板、单层钢筋网片的混凝土楼板中的分布筋偏少。由于钢筋的阻滞 ,使温度变形、干湿变形不一致 ,而造成上下混凝土开裂。( 5 )楼板厚度小 ,有效抗弯高度不足 ,再加上楼板内管道敷设、配置过多 ,又未采取构造措施 ,导致楼板裂缝。( 6)钢筋保护层厚度偏小 ,沿表层钢...     

住宅楼板开裂原因分析

对某住宅楼板开裂进行检测.检测结果表明混凝土设计强度等级、钢筋保护层厚度、楼板厚度、钢筋直径满足设计要求;钢筋间距不满足设计要求.根据检测结果,应用PKPM系列软件对该住宅楼进行强度复核,计算表明结构满足承载力要求,表明裂缝为非结构性裂缝.提出了对该裂缝处理办法及防治措施.     

现浇混凝土梁、板裂缝成因分析

文章利用现场采取构件的数据来分析可能产生裂缝的原因,对日后分析混凝土梁板产生裂缝原因有一定效果的帮助。文章是结合工程现场实际回弹法混凝土抗压强度、钢筋配置、楼板厚度及裂缝宽度检测结果进行分析,结果对以后的结构裂缝成因分析工作具有一定的指导意义。     

某工程现浇混凝土楼板裂缝的成因及处理措施

以某工程混凝土楼板开裂为例,对混凝土楼板开裂原因进行了分析,指出大风降温且养护不周是产生裂缝的主要原因;分析了裂缝对混凝土楼板造成的影响,此裂缝一般不影响结构的强度,但降低了结构的耐久性,影响了混凝土的外观质量。本工程用抹灰修补裂缝获得了较好的效果。     

某住宅楼楼板裂缝检测

混凝土本身的特性、外界的不可控因素使得混凝土很容易开裂,故需要对开裂的混凝土结构进行检测.混凝土楼板裂缝的检测包含裂缝描绘、混凝土楼板厚度检测、板构件混凝土抗压强度检测、板构件纵向受力钢筋保护层厚度检测、板构件纵向受力钢筋间距检测、板构件钢筋直径、楼板承载力复合验算七个项目.通过现场板厚、混凝土强度、钢筋保护层厚度、钢...     

现浇混凝土楼板裂缝的成因及预防

现浇混凝土楼板裂缝的成因是多方面的,其中施工质量不好是主要原因之一.因此,本文指出加强对混凝土配制、浇筑、养护和模板支设、钢筋绑扎等施工过程管理,严格按照施工图纸和操作规程进行施工,完全可以避免或减少现浇混凝土楼板裂缝的产生.     

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.